Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

28 files changed, 19571 insertions, 0 deletions

diff --git a/nsprpub/pr/src/misc/Makefile.in b/nsprpub/pr/src/misc/Makefile.in
new file mode 100644
index 0000000000..3d87da2091
--- /dev/null
+++ b/nsprpub/pr/src/misc/Makefile.in
@@ -0,0 +1,80 @@
+# 
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#! gmake
+
+MOD_DEPTH	= ../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(MOD_DEPTH)/config/autoconf.mk
+
+include $(topsrcdir)/config/config.mk
+
+CSRCS = \
+	pralarm.c  \
+	pratom.c   \
+	prcountr.c \
+	prdtoa.c   \
+	prenv.c    \
+	prerr.c  \
+	prerror.c  \
+	prerrortable.c  \
+	prinit.c   \
+	prinrval.c \
+	pripc.c \
+	prlog2.c   \
+	prlong.c   \
+	prnetdb.c  \
+	praton.c  \
+	prolock.c  \
+	prrng.c    \
+	prsystem.c \
+	prtime.c   \
+	prthinfo.c \
+	prtpool.c \
+	prtrace.c  \
+	$(NULL)
+
+ifndef USE_PTHREADS
+CSRCS += \
+	pripcsem.c \
+	$(NULL)
+endif
+
+TARGETS	= $(OBJS)
+
+INCLUDES = -I$(dist_includedir) -I$(topsrcdir)/pr/include -I$(topsrcdir)/pr/include/private
+
+DEFINES	+= -D_NSPR_BUILD_
+
+RELEASE_BINS = $(srcdir)/compile-et.pl $(srcdir)/prerr.properties
+
+include $(topsrcdir)/config/rules.mk
+
+# Prevent floating point errors caused by MSVC 6.0 Processor Pack
+# optimizations (bug 207421).  This disables optimizations that
+# could change the precision of floating-point calculations for
+# this single compilation unit.
+ifeq ($(NS_USE_GCC)_$(OS_ARCH),_WINNT)
+$(OBJDIR)/prdtoa.$(OBJ_SUFFIX): prdtoa.c
+	@$(MAKE_OBJDIR)
+ifeq (,$(filter-out 1100 1200 1300 1310,$(MSC_VER)))
+	$(CC) -Fo$@ -c $(CFLAGS) -Op $(call pr_abspath,$<)
+else
+	$(CC) -Fo$@ -c $(CFLAGS) -fp:precise $(call pr_abspath,$<)
+endif
+endif
+
+#
+# Generate prerr.h, prerr.c, and prerr.properties from prerr.et.
+#
+build_prerr:
+	cd $(srcdir); $(PERL) compile-et.pl prerr.et
+
+export:: $(TARGETS)
+
+
diff --git a/nsprpub/pr/src/misc/compile-et.pl b/nsprpub/pr/src/misc/compile-et.pl
new file mode 100644
index 0000000000..50855298a4
--- /dev/null
+++ b/nsprpub/pr/src/misc/compile-et.pl
@@ -0,0 +1,108 @@
+#!/usr/bin/perl
+
+# usage: compile-et input.et
+
+# 
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+sub header
+{
+    local($filename, $comment) = @_;
+
+<<EOF
+$comment
+$comment $filename
+$comment This file is automatically generated; please do not edit it.
+EOF
+}
+
+sub table_base
+{
+    local($name) = @_;
+    local($base) = 0;
+
+    for ($i = 0; $i < length($name); $i++) {
+	$base *= 64;
+	$base += index("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_", substr($name, $i, 1)) + 1;
+    }
+    $base -= 0x1000000 if ($base > 0x7fffff);
+    $base*256;
+}
+
+sub code {
+    local($macro, $text) = @_;
+    $code = $table_base + $table_item_count;
+
+    print H "\n";
+    print H "/* ", $text, " */\n";
+    printf H "#define %-40s (%dL)\n", $macro, $code;
+
+    print C "\t{\"", $macro, "\",    \"", $text, "\"},\n";
+
+    print PROPERTIES $macro, "=", $text, "\n";
+
+    $table_item_count++;
+}
+
+
+$filename = $ARGV[0];
+open(INPUT, "< $filename") || die "Can't read $filename: $!\n";
+
+$base = "$filename";
+$base =~ s/\.et$//;
+$base =~ s#.*/##;
+
+open(H, "> ${base}.h") || die "Can't write ${base}.h\n";
+open(C, "> ${base}.c") || die "Can't write ${base}.c\n";
+open(PROPERTIES, "> ${base}.properties") || die "Can't write ${base}.properties\n";
+
+print H "/*\n", &header("${base}.h", " *"), " */\n";
+print C "/*\n", &header("${base}.c", " *"), " */\n";
+print PROPERTIES &header("${base}.properties", "#");
+
+$skipone = 0;
+
+while ($_ = <INPUT>) {
+    next if /^#/;
+
+    if (/^[ \t]*(error_table|et)[ \t]+([a-zA-Z][a-zA-Z0-9_]+) *(-?[0-9]*)/) {
+	$table_name = $2;
+	if ($3) {
+	    $table_base = $3;
+	}
+	else {
+	    $table_base = &table_base($table_name);
+	}
+	$table_item_count = 0;
+
+	print C "#include \"prerror.h\"\n";
+	print C "static const struct PRErrorMessage text[] = {\n";
+    }
+    elsif (/^[ \t]*(error_code|ec)[ \t]+([A-Z_0-9]+),[ \t]*$/) {
+	$skipone = 1;
+	$macro = $2;
+    }
+    elsif (/^[ \t]*(error_code|ec)[ \t]+([A-Z_0-9]+),[ \t]*"(.*)"[ \t]*$/) {
+	&code($2, $3);
+    }
+    elsif ($skipone && /^[ \t]*"(.*)"[ \t]*$/) {
+	&code($macro, $1);
+    }
+}
+
+print H "\n";
+print H "extern void ", $table_name, "_InitializePRErrorTable","(void);\n";
+printf H "#define ERROR_TABLE_BASE_%s (%dL)\n", $table_name, $table_base;
+
+print C "\t{0, 0}\n";
+print C "};\n\n";
+printf C "static const struct PRErrorTable et = { text, \"%s\", %dL, %d };\n",
+    $base, $table_base, $table_item_count;
+print C "\n";
+print C "void ", $table_name, "_InitializePRErrorTable", "(void) {\n";
+print C "    PR_ErrorInstallTable(&et);\n";
+print C "}\n";
+
+0;
diff --git a/nsprpub/pr/src/misc/dtoa.c b/nsprpub/pr/src/misc/dtoa.c
new file mode 100644
index 0000000000..43883aba26
--- /dev/null
+++ b/nsprpub/pr/src/misc/dtoa.c
@@ -0,0 +1,4610 @@
+/****************************************************************
+ *
+ * The author of this software is David M. Gay.
+ *
+ * Copyright (c) 1991, 2000, 2001 by Lucent Technologies.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose without fee is hereby granted, provided that this entire notice
+ * is included in all copies of any software which is or includes a copy
+ * or modification of this software and in all copies of the supporting
+ * documentation for such software.
+ *
+ * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHOR NOR LUCENT MAKES ANY
+ * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
+ * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
+ *
+ ***************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to ".").  */
+
+/* On a machine with IEEE extended-precision registers, it is
+ * necessary to specify double-precision (53-bit) rounding precision
+ * before invoking strtod or dtoa.  If the machine uses (the equivalent
+ * of) Intel 80x87 arithmetic, the call
+ *  _control87(PC_53, MCW_PC);
+ * does this with many compilers.  Whether this or another call is
+ * appropriate depends on the compiler; for this to work, it may be
+ * necessary to #include "float.h" or another system-dependent header
+ * file.
+ */
+
+/* strtod for IEEE-, VAX-, and IBM-arithmetic machines.
+ *
+ * This strtod returns a nearest machine number to the input decimal
+ * string (or sets errno to ERANGE).  With IEEE arithmetic, ties are
+ * broken by the IEEE round-even rule.  Otherwise ties are broken by
+ * biased rounding (add half and chop).
+ *
+ * Inspired loosely by William D. Clinger's paper "How to Read Floating
+ * Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 92-101].
+ *
+ * Modifications:
+ *
+ *  1. We only require IEEE, IBM, or VAX double-precision
+ *      arithmetic (not IEEE double-extended).
+ *  2. We get by with floating-point arithmetic in a case that
+ *      Clinger missed -- when we're computing d * 10^n
+ *      for a small integer d and the integer n is not too
+ *      much larger than 22 (the maximum integer k for which
+ *      we can represent 10^k exactly), we may be able to
+ *      compute (d*10^k) * 10^(e-k) with just one roundoff.
+ *  3. Rather than a bit-at-a-time adjustment of the binary
+ *      result in the hard case, we use floating-point
+ *      arithmetic to determine the adjustment to within
+ *      one bit; only in really hard cases do we need to
+ *      compute a second residual.
+ *  4. Because of 3., we don't need a large table of powers of 10
+ *      for ten-to-e (just some small tables, e.g. of 10^k
+ *      for 0 <= k <= 22).
+ */
+
+/*
+ * #define IEEE_8087 for IEEE-arithmetic machines where the least
+ *  significant byte has the lowest address.
+ * #define IEEE_MC68k for IEEE-arithmetic machines where the most
+ *  significant byte has the lowest address.
+ * #define Long int on machines with 32-bit ints and 64-bit longs.
+ * #define IBM for IBM mainframe-style floating-point arithmetic.
+ * #define VAX for VAX-style floating-point arithmetic (D_floating).
+ * #define No_leftright to omit left-right logic in fast floating-point
+ *  computation of dtoa.  This will cause dtoa modes 4 and 5 to be
+ *  treated the same as modes 2 and 3 for some inputs.
+ * #define Honor_FLT_ROUNDS if FLT_ROUNDS can assume the values 2 or 3
+ *  and strtod and dtoa should round accordingly.  Unless Trust_FLT_ROUNDS
+ *  is also #defined, fegetround() will be queried for the rounding mode.
+ *  Note that both FLT_ROUNDS and fegetround() are specified by the C99
+ *  standard (and are specified to be consistent, with fesetround()
+ *  affecting the value of FLT_ROUNDS), but that some (Linux) systems
+ *  do not work correctly in this regard, so using fegetround() is more
+ *  portable than using FLT_ROUNDS directly.
+ * #define Check_FLT_ROUNDS if FLT_ROUNDS can assume the values 2 or 3
+ *  and Honor_FLT_ROUNDS is not #defined.
+ * #define RND_PRODQUOT to use rnd_prod and rnd_quot (assembly routines
+ *  that use extended-precision instructions to compute rounded
+ *  products and quotients) with IBM.
+ * #define ROUND_BIASED for IEEE-format with biased rounding and arithmetic
+ *  that rounds toward +Infinity.
+ * #define ROUND_BIASED_without_Round_Up for IEEE-format with biased
+ *  rounding when the underlying floating-point arithmetic uses
+ *  unbiased rounding.  This prevent using ordinary floating-point
+ *  arithmetic when the result could be computed with one rounding error.
+ * #define Inaccurate_Divide for IEEE-format with correctly rounded
+ *  products but inaccurate quotients, e.g., for Intel i860.
+ * #define NO_LONG_LONG on machines that do not have a "long long"
+ *  integer type (of >= 64 bits).  On such machines, you can
+ *  #define Just_16 to store 16 bits per 32-bit Long when doing
+ *  high-precision integer arithmetic.  Whether this speeds things
+ *  up or slows things down depends on the machine and the number
+ *  being converted.  If long long is available and the name is
+ *  something other than "long long", #define Llong to be the name,
+ *  and if "unsigned Llong" does not work as an unsigned version of
+ *  Llong, #define #ULLong to be the corresponding unsigned type.
+ * #define KR_headers for old-style C function headers.
+ * #define Bad_float_h if your system lacks a float.h or if it does not
+ *  define some or all of DBL_DIG, DBL_MAX_10_EXP, DBL_MAX_EXP,
+ *  FLT_RADIX, FLT_ROUNDS, and DBL_MAX.
+ * #define MALLOC your_malloc, where your_malloc(n) acts like malloc(n)
+ *  if memory is available and otherwise does something you deem
+ *  appropriate.  If MALLOC is undefined, malloc will be invoked
+ *  directly -- and assumed always to succeed.  Similarly, if you
+ *  want something other than the system's free() to be called to
+ *  recycle memory acquired from MALLOC, #define FREE to be the
+ *  name of the alternate routine.  (FREE or free is only called in
+ *  pathological cases, e.g., in a dtoa call after a dtoa return in
+ *  mode 3 with thousands of digits requested.)
+ * #define Omit_Private_Memory to omit logic (added Jan. 1998) for making
+ *  memory allocations from a private pool of memory when possible.
+ *  When used, the private pool is PRIVATE_MEM bytes long:  2304 bytes,
+ *  unless #defined to be a different length.  This default length
+ *  suffices to get rid of MALLOC calls except for unusual cases,
+ *  such as decimal-to-binary conversion of a very long string of
+ *  digits.  The longest string dtoa can return is about 751 bytes
+ *  long.  For conversions by strtod of strings of 800 digits and
+ *  all dtoa conversions in single-threaded executions with 8-byte
+ *  pointers, PRIVATE_MEM >= 7400 appears to suffice; with 4-byte
+ *  pointers, PRIVATE_MEM >= 7112 appears adequate.
+ * #define NO_INFNAN_CHECK if you do not wish to have INFNAN_CHECK
+ *  #defined automatically on IEEE systems.  On such systems,
+ *  when INFNAN_CHECK is #defined, strtod checks
+ *  for Infinity and NaN (case insensitively).  On some systems
+ *  (e.g., some HP systems), it may be necessary to #define NAN_WORD0
+ *  appropriately -- to the most significant word of a quiet NaN.
+ *  (On HP Series 700/800 machines, -DNAN_WORD0=0x7ff40000 works.)
+ *  When INFNAN_CHECK is #defined and No_Hex_NaN is not #defined,
+ *  strtod also accepts (case insensitively) strings of the form
+ *  NaN(x), where x is a string of hexadecimal digits and spaces;
+ *  if there is only one string of hexadecimal digits, it is taken
+ *  for the 52 fraction bits of the resulting NaN; if there are two
+ *  or more strings of hex digits, the first is for the high 20 bits,
+ *  the second and subsequent for the low 32 bits, with intervening
+ *  white space ignored; but if this results in none of the 52
+ *  fraction bits being on (an IEEE Infinity symbol), then NAN_WORD0
+ *  and NAN_WORD1 are used instead.
+ * #define MULTIPLE_THREADS if the system offers preemptively scheduled
+ *  multiple threads.  In this case, you must provide (or suitably
+ *  #define) two locks, acquired by ACQUIRE_DTOA_LOCK(n) and freed
+ *  by FREE_DTOA_LOCK(n) for n = 0 or 1.  (The second lock, accessed
+ *  in pow5mult, ensures lazy evaluation of only one copy of high
+ *  powers of 5; omitting this lock would introduce a small
+ *  probability of wasting memory, but would otherwise be harmless.)
+ *  You must also invoke freedtoa(s) to free the value s returned by
+ *  dtoa.  You may do so whether or not MULTIPLE_THREADS is #defined.
+ * #define NO_IEEE_Scale to disable new (Feb. 1997) logic in strtod that
+ *  avoids underflows on inputs whose result does not underflow.
+ *  If you #define NO_IEEE_Scale on a machine that uses IEEE-format
+ *  floating-point numbers and flushes underflows to zero rather
+ *  than implementing gradual underflow, then you must also #define
+ *  Sudden_Underflow.
+ * #define USE_LOCALE to use the current locale's decimal_point value.
+ * #define SET_INEXACT if IEEE arithmetic is being used and extra
+ *  computation should be done to set the inexact flag when the
+ *  result is inexact and avoid setting inexact when the result
+ *  is exact.  In this case, dtoa.c must be compiled in
+ *  an environment, perhaps provided by #include "dtoa.c" in a
+ *  suitable wrapper, that defines two functions,
+ *      int get_inexact(void);
+ *      void clear_inexact(void);
+ *  such that get_inexact() returns a nonzero value if the
+ *  inexact bit is already set, and clear_inexact() sets the
+ *  inexact bit to 0.  When SET_INEXACT is #defined, strtod
+ *  also does extra computations to set the underflow and overflow
+ *  flags when appropriate (i.e., when the result is tiny and
+ *  inexact or when it is a numeric value rounded to +-infinity).
+ * #define NO_ERRNO if strtod should not assign errno = ERANGE when
+ *  the result overflows to +-Infinity or underflows to 0.
+ * #define NO_HEX_FP to omit recognition of hexadecimal floating-point
+ *  values by strtod.
+ * #define NO_STRTOD_BIGCOMP (on IEEE-arithmetic systems only for now)
+ *  to disable logic for "fast" testing of very long input strings
+ *  to strtod.  This testing proceeds by initially truncating the
+ *  input string, then if necessary comparing the whole string with
+ *  a decimal expansion to decide close cases. This logic is only
+ *  used for input more than STRTOD_DIGLIM digits long (default 40).
+ */
+
+#ifndef Long
+#define Long long
+#endif
+#ifndef ULong
+typedef unsigned Long ULong;
+#endif
+
+#ifdef DEBUG
+#include "stdio.h"
+#define Bug(x) {fprintf(stderr, "%s\n", x); exit(1);}
+#endif
+
+#include "stdlib.h"
+#include "string.h"
+
+#ifdef USE_LOCALE
+#include "locale.h"
+#endif
+
+#ifdef Honor_FLT_ROUNDS
+#ifndef Trust_FLT_ROUNDS
+#include <fenv.h>
+#endif
+#endif
+
+#ifdef MALLOC
+#ifdef KR_headers
+extern char *MALLOC();
+#else
+extern void *MALLOC(size_t);
+#endif
+#else
+#define MALLOC malloc
+#endif
+
+#ifndef Omit_Private_Memory
+#ifndef PRIVATE_MEM
+#define PRIVATE_MEM 2304
+#endif
+#define PRIVATE_mem ((PRIVATE_MEM+sizeof(double)-1)/sizeof(double))
+static double private_mem[PRIVATE_mem], *pmem_next = private_mem;
+#endif
+
+#undef IEEE_Arith
+#undef Avoid_Underflow
+#ifdef IEEE_MC68k
+#define IEEE_Arith
+#endif
+#ifdef IEEE_8087
+#define IEEE_Arith
+#endif
+
+#ifdef IEEE_Arith
+#ifndef NO_INFNAN_CHECK
+#undef INFNAN_CHECK
+#define INFNAN_CHECK
+#endif
+#else
+#undef INFNAN_CHECK
+#define NO_STRTOD_BIGCOMP
+#endif
+
+#include "errno.h"
+
+#ifdef Bad_float_h
+
+#ifdef IEEE_Arith
+#define DBL_DIG 15
+#define DBL_MAX_10_EXP 308
+#define DBL_MAX_EXP 1024
+#define FLT_RADIX 2
+#endif /*IEEE_Arith*/
+
+#ifdef IBM
+#define DBL_DIG 16
+#define DBL_MAX_10_EXP 75
+#define DBL_MAX_EXP 63
+#define FLT_RADIX 16
+#define DBL_MAX 7.2370055773322621e+75
+#endif
+
+#ifdef VAX
+#define DBL_DIG 16
+#define DBL_MAX_10_EXP 38
+#define DBL_MAX_EXP 127
+#define FLT_RADIX 2
+#define DBL_MAX 1.7014118346046923e+38
+#endif
+
+#ifndef LONG_MAX
+#define LONG_MAX 2147483647
+#endif
+
+#else /* ifndef Bad_float_h */
+#include "float.h"
+#endif /* Bad_float_h */
+
+#ifndef __MATH_H__
+#include "math.h"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef CONST
+#ifdef KR_headers
+#define CONST /* blank */
+#else
+#define CONST const
+#endif
+#endif
+
+#if defined(IEEE_8087) + defined(IEEE_MC68k) + defined(VAX) + defined(IBM) != 1
+Exactly one of IEEE_8087, IEEE_MC68k, VAX, or IBM should be defined.
+#endif
+
+typedef union {
+    double d;
+    ULong L[2];
+} U;
+
+#ifdef IEEE_8087
+#define word0(x) (x)->L[1]
+#define word1(x) (x)->L[0]
+#else
+#define word0(x) (x)->L[0]
+#define word1(x) (x)->L[1]
+#endif
+#define dval(x) (x)->d
+
+#ifndef STRTOD_DIGLIM
+#define STRTOD_DIGLIM 40
+#endif
+
+#ifdef DIGLIM_DEBUG
+extern int strtod_diglim;
+#else
+#define strtod_diglim STRTOD_DIGLIM
+#endif
+
+/* The following definition of Storeinc is appropriate for MIPS processors.
+ * An alternative that might be better on some machines is
+ * #define Storeinc(a,b,c) (*a++ = b << 16 | c & 0xffff)
+ */
+#if defined(IEEE_8087) + defined(VAX)
+#define Storeinc(a,b,c) (((unsigned short *)a)[1] = (unsigned short)b, \
+((unsigned short *)a)[0] = (unsigned short)c, a++)
+#else
+#define Storeinc(a,b,c) (((unsigned short *)a)[0] = (unsigned short)b, \
+((unsigned short *)a)[1] = (unsigned short)c, a++)
+#endif
+
+/* #define P DBL_MANT_DIG */
+/* Ten_pmax = floor(P*log(2)/log(5)) */
+/* Bletch = (highest power of 2 < DBL_MAX_10_EXP) / 16 */
+/* Quick_max = floor((P-1)*log(FLT_RADIX)/log(10) - 1) */
+/* Int_max = floor(P*log(FLT_RADIX)/log(10) - 1) */
+
+#ifdef IEEE_Arith
+#define Exp_shift  20
+#define Exp_shift1 20
+#define Exp_msk1    0x100000
+#define Exp_msk11   0x100000
+#define Exp_mask  0x7ff00000
+#define P 53
+#define Nbits 53
+#define Bias 1023
+#define Emax 1023
+#define Emin (-1022)
+#define Exp_1  0x3ff00000
+#define Exp_11 0x3ff00000
+#define Ebits 11
+#define Frac_mask  0xfffff
+#define Frac_mask1 0xfffff
+#define Ten_pmax 22
+#define Bletch 0x10
+#define Bndry_mask  0xfffff
+#define Bndry_mask1 0xfffff
+#define LSB 1
+#define Sign_bit 0x80000000
+#define Log2P 1
+#define Tiny0 0
+#define Tiny1 1
+#define Quick_max 14
+#define Int_max 14
+#ifndef NO_IEEE_Scale
+#define Avoid_Underflow
+#ifdef Flush_Denorm /* debugging option */
+#undef Sudden_Underflow
+#endif
+#endif
+
+#ifndef Flt_Rounds
+#ifdef FLT_ROUNDS
+#define Flt_Rounds FLT_ROUNDS
+#else
+#define Flt_Rounds 1
+#endif
+#endif /*Flt_Rounds*/
+
+#ifdef Honor_FLT_ROUNDS
+#undef Check_FLT_ROUNDS
+#define Check_FLT_ROUNDS
+#else
+#define Rounding Flt_Rounds
+#endif
+
+#else /* ifndef IEEE_Arith */
+#undef Check_FLT_ROUNDS
+#undef Honor_FLT_ROUNDS
+#undef SET_INEXACT
+#undef  Sudden_Underflow
+#define Sudden_Underflow
+#ifdef IBM
+#undef Flt_Rounds
+#define Flt_Rounds 0
+#define Exp_shift  24
+#define Exp_shift1 24
+#define Exp_msk1   0x1000000
+#define Exp_msk11  0x1000000
+#define Exp_mask  0x7f000000
+#define P 14
+#define Nbits 56
+#define Bias 65
+#define Emax 248
+#define Emin (-260)
+#define Exp_1  0x41000000
+#define Exp_11 0x41000000
+#define Ebits 8 /* exponent has 7 bits, but 8 is the right value in b2d */
+#define Frac_mask  0xffffff
+#define Frac_mask1 0xffffff
+#define Bletch 4
+#define Ten_pmax 22
+#define Bndry_mask  0xefffff
+#define Bndry_mask1 0xffffff
+#define LSB 1
+#define Sign_bit 0x80000000
+#define Log2P 4
+#define Tiny0 0x100000
+#define Tiny1 0
+#define Quick_max 14
+#define Int_max 15
+#else /* VAX */
+#undef Flt_Rounds
+#define Flt_Rounds 1
+#define Exp_shift  23
+#define Exp_shift1 7
+#define Exp_msk1    0x80
+#define Exp_msk11   0x800000
+#define Exp_mask  0x7f80
+#define P 56
+#define Nbits 56
+#define Bias 129
+#define Emax 126
+#define Emin (-129)
+#define Exp_1  0x40800000
+#define Exp_11 0x4080
+#define Ebits 8
+#define Frac_mask  0x7fffff
+#define Frac_mask1 0xffff007f
+#define Ten_pmax 24
+#define Bletch 2
+#define Bndry_mask  0xffff007f
+#define Bndry_mask1 0xffff007f
+#define LSB 0x10000
+#define Sign_bit 0x8000
+#define Log2P 1
+#define Tiny0 0x80
+#define Tiny1 0
+#define Quick_max 15
+#define Int_max 15
+#endif /* IBM, VAX */
+#endif /* IEEE_Arith */
+
+#ifndef IEEE_Arith
+#define ROUND_BIASED
+#else
+#ifdef ROUND_BIASED_without_Round_Up
+#undef  ROUND_BIASED
+#define ROUND_BIASED
+#endif
+#endif
+
+#ifdef RND_PRODQUOT
+#define rounded_product(a,b) a = rnd_prod(a, b)
+#define rounded_quotient(a,b) a = rnd_quot(a, b)
+#ifdef KR_headers
+extern double rnd_prod(), rnd_quot();
+#else
+extern double rnd_prod(double, double), rnd_quot(double, double);
+#endif
+#else
+#define rounded_product(a,b) a *= b
+#define rounded_quotient(a,b) a /= b
+#endif
+
+#define Big0 (Frac_mask1 | Exp_msk1*(DBL_MAX_EXP+Bias-1))
+#define Big1 0xffffffff
+
+#ifndef Pack_32
+#define Pack_32
+#endif
+
+typedef struct BCinfo BCinfo;
+struct
+    BCinfo {
+    int dp0, dp1, dplen, dsign, e0, inexact, nd, nd0, rounding, scale, uflchk;
+};
+
+#ifdef KR_headers
+#define FFFFFFFF ((((unsigned long)0xffff)<<16)|(unsigned long)0xffff)
+#else
+#define FFFFFFFF 0xffffffffUL
+#endif
+
+#ifdef NO_LONG_LONG
+#undef ULLong
+#ifdef Just_16
+#undef Pack_32
+/* When Pack_32 is not defined, we store 16 bits per 32-bit Long.
+ * This makes some inner loops simpler and sometimes saves work
+ * during multiplications, but it often seems to make things slightly
+ * slower.  Hence the default is now to store 32 bits per Long.
+ */
+#endif
+#else   /* long long available */
+#ifndef Llong
+#define Llong long long
+#endif
+#ifndef ULLong
+#define ULLong unsigned Llong
+#endif
+#endif /* NO_LONG_LONG */
+
+#ifndef MULTIPLE_THREADS
+#define ACQUIRE_DTOA_LOCK(n)    /*nothing*/
+#define FREE_DTOA_LOCK(n)   /*nothing*/
+#endif
+
+#define Kmax 7
+
+#ifdef __cplusplus
+extern "C" double strtod(const char *s00, char **se);
+extern "C" char *dtoa(double d, int mode, int ndigits,
+                      int *decpt, int *sign, char **rve);
+#endif
+
+struct
+    Bigint {
+    struct Bigint *next;
+    int k, maxwds, sign, wds;
+    ULong x[1];
+};
+
+typedef struct Bigint Bigint;
+
+static Bigint *freelist[Kmax+1];
+
+static Bigint *
+Balloc
+#ifdef KR_headers
+(k) int k;
+#else
+(int k)
+#endif
+{
+    int x;
+    Bigint *rv;
+#ifndef Omit_Private_Memory
+    unsigned int len;
+#endif
+
+    ACQUIRE_DTOA_LOCK(0);
+    /* The k > Kmax case does not need ACQUIRE_DTOA_LOCK(0), */
+    /* but this case seems very unlikely. */
+    if (k <= Kmax && (rv = freelist[k])) {
+        freelist[k] = rv->next;
+    }
+    else {
+        x = 1 << k;
+#ifdef Omit_Private_Memory
+        rv = (Bigint *)MALLOC(sizeof(Bigint) + (x-1)*sizeof(ULong));
+#else
+        len = (sizeof(Bigint) + (x-1)*sizeof(ULong) + sizeof(double) - 1)
+              /sizeof(double);
+        if (k <= Kmax && pmem_next - private_mem + len <= PRIVATE_mem) {
+            rv = (Bigint*)pmem_next;
+            pmem_next += len;
+        }
+        else {
+            rv = (Bigint*)MALLOC(len*sizeof(double));
+        }
+#endif
+        rv->k = k;
+        rv->maxwds = x;
+    }
+    FREE_DTOA_LOCK(0);
+    rv->sign = rv->wds = 0;
+    return rv;
+}
+
+static void
+Bfree
+#ifdef KR_headers
+(v) Bigint *v;
+#else
+(Bigint *v)
+#endif
+{
+    if (v) {
+        if (v->k > Kmax)
+#ifdef FREE
+            FREE((void*)v);
+#else
+            free((void*)v);
+#endif
+        else {
+            ACQUIRE_DTOA_LOCK(0);
+            v->next = freelist[v->k];
+            freelist[v->k] = v;
+            FREE_DTOA_LOCK(0);
+        }
+    }
+}
+
+#define Bcopy(x,y) memcpy((char *)&x->sign, (char *)&y->sign, \
+y->wds*sizeof(Long) + 2*sizeof(int))
+
+static Bigint *
+multadd
+#ifdef KR_headers
+(b, m, a) Bigint *b; int m, a;
+#else
+(Bigint *b, int m, int a)   /* multiply by m and add a */
+#endif
+{
+    int i, wds;
+#ifdef ULLong
+    ULong *x;
+    ULLong carry, y;
+#else
+    ULong carry, *x, y;
+#ifdef Pack_32
+    ULong xi, z;
+#endif
+#endif
+    Bigint *b1;
+
+    wds = b->wds;
+    x = b->x;
+    i = 0;
+    carry = a;
+    do {
+#ifdef ULLong
+        y = *x * (ULLong)m + carry;
+        carry = y >> 32;
+        *x++ = y & FFFFFFFF;
+#else
+#ifdef Pack_32
+        xi = *x;
+        y = (xi & 0xffff) * m + carry;
+        z = (xi >> 16) * m + (y >> 16);
+        carry = z >> 16;
+        *x++ = (z << 16) + (y & 0xffff);
+#else
+        y = *x * m + carry;
+        carry = y >> 16;
+        *x++ = y & 0xffff;
+#endif
+#endif
+    }
+    while(++i < wds);
+    if (carry) {
+        if (wds >= b->maxwds) {
+            b1 = Balloc(b->k+1);
+            Bcopy(b1, b);
+            Bfree(b);
+            b = b1;
+        }
+        b->x[wds++] = carry;
+        b->wds = wds;
+    }
+    return b;
+}
+
+static Bigint *
+s2b
+#ifdef KR_headers
+(s, nd0, nd, y9, dplen) CONST char *s; int nd0, nd, dplen; ULong y9;
+#else
+(const char *s, int nd0, int nd, ULong y9, int dplen)
+#endif
+{
+    Bigint *b;
+    int i, k;
+    Long x, y;
+
+    x = (nd + 8) / 9;
+    for(k = 0, y = 1; x > y; y <<= 1, k++) ;
+#ifdef Pack_32
+    b = Balloc(k);
+    b->x[0] = y9;
+    b->wds = 1;
+#else
+    b = Balloc(k+1);
+    b->x[0] = y9 & 0xffff;
+    b->wds = (b->x[1] = y9 >> 16) ? 2 : 1;
+#endif
+
+    i = 9;
+    if (9 < nd0) {
+        s += 9;
+        do {
+            b = multadd(b, 10, *s++ - '0');
+        }
+        while(++i < nd0);
+        s += dplen;
+    }
+    else {
+        s += dplen + 9;
+    }
+    for(; i < nd; i++) {
+        b = multadd(b, 10, *s++ - '0');
+    }
+    return b;
+}
+
+static int
+hi0bits
+#ifdef KR_headers
+(x) ULong x;
+#else
+(ULong x)
+#endif
+{
+    int k = 0;
+
+    if (!(x & 0xffff0000)) {
+        k = 16;
+        x <<= 16;
+    }
+    if (!(x & 0xff000000)) {
+        k += 8;
+        x <<= 8;
+    }
+    if (!(x & 0xf0000000)) {
+        k += 4;
+        x <<= 4;
+    }
+    if (!(x & 0xc0000000)) {
+        k += 2;
+        x <<= 2;
+    }
+    if (!(x & 0x80000000)) {
+        k++;
+        if (!(x & 0x40000000)) {
+            return 32;
+        }
+    }
+    return k;
+}
+
+static int
+lo0bits
+#ifdef KR_headers
+(y) ULong *y;
+#else
+(ULong *y)
+#endif
+{
+    int k;
+    ULong x = *y;
+
+    if (x & 7) {
+        if (x & 1) {
+            return 0;
+        }
+        if (x & 2) {
+            *y = x >> 1;
+            return 1;
+        }
+        *y = x >> 2;
+        return 2;
+    }
+    k = 0;
+    if (!(x & 0xffff)) {
+        k = 16;
+        x >>= 16;
+    }
+    if (!(x & 0xff)) {
+        k += 8;
+        x >>= 8;
+    }
+    if (!(x & 0xf)) {
+        k += 4;
+        x >>= 4;
+    }
+    if (!(x & 0x3)) {
+        k += 2;
+        x >>= 2;
+    }
+    if (!(x & 1)) {
+        k++;
+        x >>= 1;
+        if (!x) {
+            return 32;
+        }
+    }
+    *y = x;
+    return k;
+}
+
+static Bigint *
+i2b
+#ifdef KR_headers
+(i) int i;
+#else
+(int i)
+#endif
+{
+    Bigint *b;
+
+    b = Balloc(1);
+    b->x[0] = i;
+    b->wds = 1;
+    return b;
+}
+
+static Bigint *
+mult
+#ifdef KR_headers
+(a, b) Bigint *a, *b;
+#else
+(Bigint *a, Bigint *b)
+#endif
+{
+    Bigint *c;
+    int k, wa, wb, wc;
+    ULong *x, *xa, *xae, *xb, *xbe, *xc, *xc0;
+    ULong y;
+#ifdef ULLong
+    ULLong carry, z;
+#else
+    ULong carry, z;
+#ifdef Pack_32
+    ULong z2;
+#endif
+#endif
+
+    if (a->wds < b->wds) {
+        c = a;
+        a = b;
+        b = c;
+    }
+    k = a->k;
+    wa = a->wds;
+    wb = b->wds;
+    wc = wa + wb;
+    if (wc > a->maxwds) {
+        k++;
+    }
+    c = Balloc(k);
+    for(x = c->x, xa = x + wc; x < xa; x++) {
+        *x = 0;
+    }
+    xa = a->x;
+    xae = xa + wa;
+    xb = b->x;
+    xbe = xb + wb;
+    xc0 = c->x;
+#ifdef ULLong
+    for(; xb < xbe; xc0++) {
+        if ((y = *xb++)) {
+            x = xa;
+            xc = xc0;
+            carry = 0;
+            do {
+                z = *x++ * (ULLong)y + *xc + carry;
+                carry = z >> 32;
+                *xc++ = z & FFFFFFFF;
+            }
+            while(x < xae);
+            *xc = carry;
+        }
+    }
+#else
+#ifdef Pack_32
+    for(; xb < xbe; xb++, xc0++) {
+        if (y = *xb & 0xffff) {
+            x = xa;
+            xc = xc0;
+            carry = 0;
+            do {
+                z = (*x & 0xffff) * y + (*xc & 0xffff) + carry;
+                carry = z >> 16;
+                z2 = (*x++ >> 16) * y + (*xc >> 16) + carry;
+                carry = z2 >> 16;
+                Storeinc(xc, z2, z);
+            }
+            while(x < xae);
+            *xc = carry;
+        }
+        if (y = *xb >> 16) {
+            x = xa;
+            xc = xc0;
+            carry = 0;
+            z2 = *xc;
+            do {
+                z = (*x & 0xffff) * y + (*xc >> 16) + carry;
+                carry = z >> 16;
+                Storeinc(xc, z, z2);
+                z2 = (*x++ >> 16) * y + (*xc & 0xffff) + carry;
+                carry = z2 >> 16;
+            }
+            while(x < xae);
+            *xc = z2;
+        }
+    }
+#else
+    for(; xb < xbe; xc0++) {
+        if (y = *xb++) {
+            x = xa;
+            xc = xc0;
+            carry = 0;
+            do {
+                z = *x++ * y + *xc + carry;
+                carry = z >> 16;
+                *xc++ = z & 0xffff;
+            }
+            while(x < xae);
+            *xc = carry;
+        }
+    }
+#endif
+#endif
+    for(xc0 = c->x, xc = xc0 + wc; wc > 0 && !*--xc; --wc) ;
+    c->wds = wc;
+    return c;
+}
+
+static Bigint *p5s;
+
+static Bigint *
+pow5mult
+#ifdef KR_headers
+(b, k) Bigint *b; int k;
+#else
+(Bigint *b, int k)
+#endif
+{
+    Bigint *b1, *p5, *p51;
+    int i;
+    static int p05[3] = { 5, 25, 125 };
+
+    if ((i = k & 3)) {
+        b = multadd(b, p05[i-1], 0);
+    }
+
+    if (!(k >>= 2)) {
+        return b;
+    }
+    if (!(p5 = p5s)) {
+        /* first time */
+#ifdef MULTIPLE_THREADS
+        ACQUIRE_DTOA_LOCK(1);
+        if (!(p5 = p5s)) {
+            p5 = p5s = i2b(625);
+            p5->next = 0;
+        }
+        FREE_DTOA_LOCK(1);
+#else
+        p5 = p5s = i2b(625);
+        p5->next = 0;
+#endif
+    }
+    for(;;) {
+        if (k & 1) {
+            b1 = mult(b, p5);
+            Bfree(b);
+            b = b1;
+        }
+        if (!(k >>= 1)) {
+            break;
+        }
+        if (!(p51 = p5->next)) {
+#ifdef MULTIPLE_THREADS
+            ACQUIRE_DTOA_LOCK(1);
+            if (!(p51 = p5->next)) {
+                p51 = p5->next = mult(p5,p5);
+                p51->next = 0;
+            }
+            FREE_DTOA_LOCK(1);
+#else
+            p51 = p5->next = mult(p5,p5);
+            p51->next = 0;
+#endif
+        }
+        p5 = p51;
+    }
+    return b;
+}
+
+static Bigint *
+lshift
+#ifdef KR_headers
+(b, k) Bigint *b; int k;
+#else
+(Bigint *b, int k)
+#endif
+{
+    int i, k1, n, n1;
+    Bigint *b1;
+    ULong *x, *x1, *xe, z;
+
+#ifdef Pack_32
+    n = k >> 5;
+#else
+    n = k >> 4;
+#endif
+    k1 = b->k;
+    n1 = n + b->wds + 1;
+    for(i = b->maxwds; n1 > i; i <<= 1) {
+        k1++;
+    }
+    b1 = Balloc(k1);
+    x1 = b1->x;
+    for(i = 0; i < n; i++) {
+        *x1++ = 0;
+    }
+    x = b->x;
+    xe = x + b->wds;
+#ifdef Pack_32
+    if (k &= 0x1f) {
+        k1 = 32 - k;
+        z = 0;
+        do {
+            *x1++ = *x << k | z;
+            z = *x++ >> k1;
+        }
+        while(x < xe);
+        if ((*x1 = z)) {
+            ++n1;
+        }
+    }
+#else
+    if (k &= 0xf) {
+        k1 = 16 - k;
+        z = 0;
+        do {
+            *x1++ = *x << k  & 0xffff | z;
+            z = *x++ >> k1;
+        }
+        while(x < xe);
+        if (*x1 = z) {
+            ++n1;
+        }
+    }
+#endif
+    else do {
+            *x1++ = *x++;
+        }
+        while(x < xe);
+    b1->wds = n1 - 1;
+    Bfree(b);
+    return b1;
+}
+
+static int
+cmp
+#ifdef KR_headers
+(a, b) Bigint *a, *b;
+#else
+(Bigint *a, Bigint *b)
+#endif
+{
+    ULong *xa, *xa0, *xb, *xb0;
+    int i, j;
+
+    i = a->wds;
+    j = b->wds;
+#ifdef DEBUG
+    if (i > 1 && !a->x[i-1]) {
+        Bug("cmp called with a->x[a->wds-1] == 0");
+    }
+    if (j > 1 && !b->x[j-1]) {
+        Bug("cmp called with b->x[b->wds-1] == 0");
+    }
+#endif
+    if (i -= j) {
+        return i;
+    }
+    xa0 = a->x;
+    xa = xa0 + j;
+    xb0 = b->x;
+    xb = xb0 + j;
+    for(;;) {
+        if (*--xa != *--xb) {
+            return *xa < *xb ? -1 : 1;
+        }
+        if (xa <= xa0) {
+            break;
+        }
+    }
+    return 0;
+}
+
+static Bigint *
+diff
+#ifdef KR_headers
+(a, b) Bigint *a, *b;
+#else
+(Bigint *a, Bigint *b)
+#endif
+{
+    Bigint *c;
+    int i, wa, wb;
+    ULong *xa, *xae, *xb, *xbe, *xc;
+#ifdef ULLong
+    ULLong borrow, y;
+#else
+    ULong borrow, y;
+#ifdef Pack_32
+    ULong z;
+#endif
+#endif
+
+    i = cmp(a,b);
+    if (!i) {
+        c = Balloc(0);
+        c->wds = 1;
+        c->x[0] = 0;
+        return c;
+    }
+    if (i < 0) {
+        c = a;
+        a = b;
+        b = c;
+        i = 1;
+    }
+    else {
+        i = 0;
+    }
+    c = Balloc(a->k);
+    c->sign = i;
+    wa = a->wds;
+    xa = a->x;
+    xae = xa + wa;
+    wb = b->wds;
+    xb = b->x;
+    xbe = xb + wb;
+    xc = c->x;
+    borrow = 0;
+#ifdef ULLong
+    do {
+        y = (ULLong)*xa++ - *xb++ - borrow;
+        borrow = y >> 32 & (ULong)1;
+        *xc++ = y & FFFFFFFF;
+    }
+    while(xb < xbe);
+    while(xa < xae) {
+        y = *xa++ - borrow;
+        borrow = y >> 32 & (ULong)1;
+        *xc++ = y & FFFFFFFF;
+    }
+#else
+#ifdef Pack_32
+    do {
+        y = (*xa & 0xffff) - (*xb & 0xffff) - borrow;
+        borrow = (y & 0x10000) >> 16;
+        z = (*xa++ >> 16) - (*xb++ >> 16) - borrow;
+        borrow = (z & 0x10000) >> 16;
+        Storeinc(xc, z, y);
+    }
+    while(xb < xbe);
+    while(xa < xae) {
+        y = (*xa & 0xffff) - borrow;
+        borrow = (y & 0x10000) >> 16;
+        z = (*xa++ >> 16) - borrow;
+        borrow = (z & 0x10000) >> 16;
+        Storeinc(xc, z, y);
+    }
+#else
+    do {
+        y = *xa++ - *xb++ - borrow;
+        borrow = (y & 0x10000) >> 16;
+        *xc++ = y & 0xffff;
+    }
+    while(xb < xbe);
+    while(xa < xae) {
+        y = *xa++ - borrow;
+        borrow = (y & 0x10000) >> 16;
+        *xc++ = y & 0xffff;
+    }
+#endif
+#endif
+    while(!*--xc) {
+        wa--;
+    }
+    c->wds = wa;
+    return c;
+}
+
+static double
+ulp
+#ifdef KR_headers
+(x) U *x;
+#else
+(U *x)
+#endif
+{
+    Long L;
+    U u;
+
+    L = (word0(x) & Exp_mask) - (P-1)*Exp_msk1;
+#ifndef Avoid_Underflow
+#ifndef Sudden_Underflow
+    if (L > 0) {
+#endif
+#endif
+#ifdef IBM
+        L |= Exp_msk1 >> 4;
+#endif
+        word0(&u) = L;
+        word1(&u) = 0;
+#ifndef Avoid_Underflow
+#ifndef Sudden_Underflow
+    }
+    else {
+        L = -L >> Exp_shift;
+        if (L < Exp_shift) {
+            word0(&u) = 0x80000 >> L;
+            word1(&u) = 0;
+        }
+        else {
+            word0(&u) = 0;
+            L -= Exp_shift;
+            word1(&u) = L >= 31 ? 1 : 1 << 31 - L;
+        }
+    }
+#endif
+#endif
+    return dval(&u);
+}
+
+static double
+b2d
+#ifdef KR_headers
+(a, e) Bigint *a; int *e;
+#else
+(Bigint *a, int *e)
+#endif
+{
+    ULong *xa, *xa0, w, y, z;
+    int k;
+    U d;
+#ifdef VAX
+    ULong d0, d1;
+#else
+#define d0 word0(&d)
+#define d1 word1(&d)
+#endif
+
+    xa0 = a->x;
+    xa = xa0 + a->wds;
+    y = *--xa;
+#ifdef DEBUG
+    if (!y) {
+        Bug("zero y in b2d");
+    }
+#endif
+    k = hi0bits(y);
+    *e = 32 - k;
+#ifdef Pack_32
+    if (k < Ebits) {
+        d0 = Exp_1 | y >> (Ebits - k);
+        w = xa > xa0 ? *--xa : 0;
+        d1 = y << ((32-Ebits) + k) | w >> (Ebits - k);
+        goto ret_d;
+    }
+    z = xa > xa0 ? *--xa : 0;
+    if (k -= Ebits) {
+        d0 = Exp_1 | y << k | z >> (32 - k);
+        y = xa > xa0 ? *--xa : 0;
+        d1 = z << k | y >> (32 - k);
+    }
+    else {
+        d0 = Exp_1 | y;
+        d1 = z;
+    }
+#else
+    if (k < Ebits + 16) {
+        z = xa > xa0 ? *--xa : 0;
+        d0 = Exp_1 | y << k - Ebits | z >> Ebits + 16 - k;
+        w = xa > xa0 ? *--xa : 0;
+        y = xa > xa0 ? *--xa : 0;
+        d1 = z << k + 16 - Ebits | w << k - Ebits | y >> 16 + Ebits - k;
+        goto ret_d;
+    }
+    z = xa > xa0 ? *--xa : 0;
+    w = xa > xa0 ? *--xa : 0;
+    k -= Ebits + 16;
+    d0 = Exp_1 | y << k + 16 | z << k | w >> 16 - k;
+    y = xa > xa0 ? *--xa : 0;
+    d1 = w << k + 16 | y << k;
+#endif
+ret_d:
+#ifdef VAX
+    word0(&d) = d0 >> 16 | d0 << 16;
+    word1(&d) = d1 >> 16 | d1 << 16;
+#else
+#undef d0
+#undef d1
+#endif
+    return dval(&d);
+}
+
+static Bigint *
+d2b
+#ifdef KR_headers
+(d, e, bits) U *d; int *e, *bits;
+#else
+(U *d, int *e, int *bits)
+#endif
+{
+    Bigint *b;
+    int de, k;
+    ULong *x, y, z;
+#ifndef Sudden_Underflow
+    int i;
+#endif
+#ifdef VAX
+    ULong d0, d1;
+    d0 = word0(d) >> 16 | word0(d) << 16;
+    d1 = word1(d) >> 16 | word1(d) << 16;
+#else
+#define d0 word0(d)
+#define d1 word1(d)
+#endif
+
+#ifdef Pack_32
+    b = Balloc(1);
+#else
+    b = Balloc(2);
+#endif
+    x = b->x;
+
+    z = d0 & Frac_mask;
+    d0 &= 0x7fffffff;   /* clear sign bit, which we ignore */
+#ifdef Sudden_Underflow
+    de = (int)(d0 >> Exp_shift);
+#ifndef IBM
+    z |= Exp_msk11;
+#endif
+#else
+    if ((de = (int)(d0 >> Exp_shift))) {
+        z |= Exp_msk1;
+    }
+#endif
+#ifdef Pack_32
+    if ((y = d1)) {
+        if ((k = lo0bits(&y))) {
+            x[0] = y | z << (32 - k);
+            z >>= k;
+        }
+        else {
+            x[0] = y;
+        }
+#ifndef Sudden_Underflow
+        i =
+#endif
+            b->wds = (x[1] = z) ? 2 : 1;
+    }
+    else {
+        k = lo0bits(&z);
+        x[0] = z;
+#ifndef Sudden_Underflow
+        i =
+#endif
+            b->wds = 1;
+        k += 32;
+    }
+#else
+    if (y = d1) {
+        if (k = lo0bits(&y))
+            if (k >= 16) {
+                x[0] = y | z << 32 - k & 0xffff;
+                x[1] = z >> k - 16 & 0xffff;
+                x[2] = z >> k;
+                i = 2;
+            }
+            else {
+                x[0] = y & 0xffff;
+                x[1] = y >> 16 | z << 16 - k & 0xffff;
+                x[2] = z >> k & 0xffff;
+                x[3] = z >> k+16;
+                i = 3;
+            }
+        else {
+            x[0] = y & 0xffff;
+            x[1] = y >> 16;
+            x[2] = z & 0xffff;
+            x[3] = z >> 16;
+            i = 3;
+        }
+    }
+    else {
+#ifdef DEBUG
+        if (!z) {
+            Bug("Zero passed to d2b");
+        }
+#endif
+        k = lo0bits(&z);
+        if (k >= 16) {
+            x[0] = z;
+            i = 0;
+        }
+        else {
+            x[0] = z & 0xffff;
+            x[1] = z >> 16;
+            i = 1;
+        }
+        k += 32;
+    }
+    while(!x[i]) {
+        --i;
+    }
+    b->wds = i + 1;
+#endif
+#ifndef Sudden_Underflow
+    if (de) {
+#endif
+#ifdef IBM
+        *e = (de - Bias - (P-1) << 2) + k;
+        *bits = 4*P + 8 - k - hi0bits(word0(d) & Frac_mask);
+#else
+        *e = de - Bias - (P-1) + k;
+        *bits = P - k;
+#endif
+#ifndef Sudden_Underflow
+    }
+    else {
+        *e = de - Bias - (P-1) + 1 + k;
+#ifdef Pack_32
+        *bits = 32*i - hi0bits(x[i-1]);
+#else
+        *bits = (i+2)*16 - hi0bits(x[i]);
+#endif
+    }
+#endif
+    return b;
+}
+#undef d0
+#undef d1
+
+static double
+ratio
+#ifdef KR_headers
+(a, b) Bigint *a, *b;
+#else
+(Bigint *a, Bigint *b)
+#endif
+{
+    U da, db;
+    int k, ka, kb;
+
+    dval(&da) = b2d(a, &ka);
+    dval(&db) = b2d(b, &kb);
+#ifdef Pack_32
+    k = ka - kb + 32*(a->wds - b->wds);
+#else
+    k = ka - kb + 16*(a->wds - b->wds);
+#endif
+#ifdef IBM
+    if (k > 0) {
+        word0(&da) += (k >> 2)*Exp_msk1;
+        if (k &= 3) {
+            dval(&da) *= 1 << k;
+        }
+    }
+    else {
+        k = -k;
+        word0(&db) += (k >> 2)*Exp_msk1;
+        if (k &= 3) {
+            dval(&db) *= 1 << k;
+        }
+    }
+#else
+    if (k > 0) {
+        word0(&da) += k*Exp_msk1;
+    }
+    else {
+        k = -k;
+        word0(&db) += k*Exp_msk1;
+    }
+#endif
+    return dval(&da) / dval(&db);
+}
+
+static CONST double
+tens[] = {
+    1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9,
+    1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19,
+    1e20, 1e21, 1e22
+#ifdef VAX
+    , 1e23, 1e24
+#endif
+};
+
+static CONST double
+#ifdef IEEE_Arith
+bigtens[] = { 1e16, 1e32, 1e64, 1e128, 1e256 };
+static CONST double tinytens[] = { 1e-16, 1e-32, 1e-64, 1e-128,
+#ifdef Avoid_Underflow
+                                   9007199254740992.*9007199254740992.e-256
+                                   /* = 2^106 * 1e-256 */
+#else
+                                   1e-256
+#endif
+                                 };
+/* The factor of 2^53 in tinytens[4] helps us avoid setting the underflow */
+/* flag unnecessarily.  It leads to a song and dance at the end of strtod. */
+#define Scale_Bit 0x10
+#define n_bigtens 5
+#else
+#ifdef IBM
+bigtens[] = { 1e16, 1e32, 1e64 };
+static CONST double tinytens[] = { 1e-16, 1e-32, 1e-64 };
+#define n_bigtens 3
+#else
+bigtens[] = { 1e16, 1e32 };
+static CONST double tinytens[] = { 1e-16, 1e-32 };
+#define n_bigtens 2
+#endif
+#endif
+
+#undef Need_Hexdig
+#ifdef INFNAN_CHECK
+#ifndef No_Hex_NaN
+#define Need_Hexdig
+#endif
+#endif
+
+#ifndef Need_Hexdig
+#ifndef NO_HEX_FP
+#define Need_Hexdig
+#endif
+#endif
+
+#ifdef Need_Hexdig /*{*/
+static unsigned char hexdig[256];
+
+static void
+#ifdef KR_headers
+htinit(h, s, inc) unsigned char *h; unsigned char *s; int inc;
+#else
+htinit(unsigned char *h, unsigned char *s, int inc)
+#endif
+{
+    int i, j;
+    for(i = 0; (j = s[i]) !=0; i++) {
+        h[j] = i + inc;
+    }
+}
+
+static void
+#ifdef KR_headers
+hexdig_init()
+#else
+hexdig_init(void)
+#endif
+{
+#define USC (unsigned char *)
+    htinit(hexdig, USC "0123456789", 0x10);
+    htinit(hexdig, USC "abcdef", 0x10 + 10);
+    htinit(hexdig, USC "ABCDEF", 0x10 + 10);
+}
+#endif /* } Need_Hexdig */
+
+#ifdef INFNAN_CHECK
+
+#ifndef NAN_WORD0
+#define NAN_WORD0 0x7ff80000
+#endif
+
+#ifndef NAN_WORD1
+#define NAN_WORD1 0
+#endif
+
+static int
+match
+#ifdef KR_headers
+(sp, t) char **sp, *t;
+#else
+(const char **sp, const char *t)
+#endif
+{
+    int c, d;
+    CONST char *s = *sp;
+
+    while((d = *t++)) {
+        if ((c = *++s) >= 'A' && c <= 'Z') {
+            c += 'a' - 'A';
+        }
+        if (c != d) {
+            return 0;
+        }
+    }
+    *sp = s + 1;
+    return 1;
+}
+
+#ifndef No_Hex_NaN
+static void
+hexnan
+#ifdef KR_headers
+(rvp, sp) U *rvp; CONST char **sp;
+#else
+(U *rvp, const char **sp)
+#endif
+{
+    ULong c, x[2];
+    CONST char *s;
+    int c1, havedig, udx0, xshift;
+
+    if (!hexdig['0']) {
+        hexdig_init();
+    }
+    x[0] = x[1] = 0;
+    havedig = xshift = 0;
+    udx0 = 1;
+    s = *sp;
+    /* allow optional initial 0x or 0X */
+    while((c = *(CONST unsigned char*)(s+1)) && c <= ' ') {
+        ++s;
+    }
+    if (s[1] == '0' && (s[2] == 'x' || s[2] == 'X')) {
+        s += 2;
+    }
+    while((c = *(CONST unsigned char*)++s)) {
+        if ((c1 = hexdig[c])) {
+            c  = c1 & 0xf;
+        }
+        else if (c <= ' ') {
+            if (udx0 && havedig) {
+                udx0 = 0;
+                xshift = 1;
+            }
+            continue;
+        }
+#ifdef GDTOA_NON_PEDANTIC_NANCHECK
+        else if (/*(*/ c == ')' && havedig) {
+            *sp = s + 1;
+            break;
+        }
+        else {
+            return;    /* invalid form: don't change *sp */
+        }
+#else
+        else {
+            do {
+                if (/*(*/ c == ')') {
+                    *sp = s + 1;
+                    break;
+                }
+            } while((c = *++s));
+            break;
+        }
+#endif
+        havedig = 1;
+        if (xshift) {
+            xshift = 0;
+            x[0] = x[1];
+            x[1] = 0;
+        }
+        if (udx0) {
+            x[0] = (x[0] << 4) | (x[1] >> 28);
+        }
+        x[1] = (x[1] << 4) | c;
+    }
+    if ((x[0] &= 0xfffff) || x[1]) {
+        word0(rvp) = Exp_mask | x[0];
+        word1(rvp) = x[1];
+    }
+}
+#endif /*No_Hex_NaN*/
+#endif /* INFNAN_CHECK */
+
+#ifdef Pack_32
+#define ULbits 32
+#define kshift 5
+#define kmask 31
+#else
+#define ULbits 16
+#define kshift 4
+#define kmask 15
+#endif
+
+#if !defined(NO_HEX_FP) || defined(Honor_FLT_ROUNDS) /*{*/
+static Bigint *
+#ifdef KR_headers
+increment(b) Bigint *b;
+#else
+increment(Bigint *b)
+#endif
+{
+    ULong *x, *xe;
+    Bigint *b1;
+
+    x = b->x;
+    xe = x + b->wds;
+    do {
+        if (*x < (ULong)0xffffffffL) {
+            ++*x;
+            return b;
+        }
+        *x++ = 0;
+    } while(x < xe);
+    {
+        if (b->wds >= b->maxwds) {
+            b1 = Balloc(b->k+1);
+            Bcopy(b1,b);
+            Bfree(b);
+            b = b1;
+        }
+        b->x[b->wds++] = 1;
+    }
+    return b;
+}
+
+#endif /*}*/
+
+#ifndef NO_HEX_FP /*{*/
+
+static void
+#ifdef KR_headers
+rshift(b, k) Bigint *b; int k;
+#else
+rshift(Bigint *b, int k)
+#endif
+{
+    ULong *x, *x1, *xe, y;
+    int n;
+
+    x = x1 = b->x;
+    n = k >> kshift;
+    if (n < b->wds) {
+        xe = x + b->wds;
+        x += n;
+        if (k &= kmask) {
+            n = 32 - k;
+            y = *x++ >> k;
+            while(x < xe) {
+                *x1++ = (y | (*x << n)) & 0xffffffff;
+                y = *x++ >> k;
+            }
+            if ((*x1 = y) !=0) {
+                x1++;
+            }
+        }
+        else
+            while(x < xe) {
+                *x1++ = *x++;
+            }
+    }
+    if ((b->wds = x1 - b->x) == 0) {
+        b->x[0] = 0;
+    }
+}
+
+static ULong
+#ifdef KR_headers
+any_on(b, k) Bigint *b; int k;
+#else
+any_on(Bigint *b, int k)
+#endif
+{
+    int n, nwds;
+    ULong *x, *x0, x1, x2;
+
+    x = b->x;
+    nwds = b->wds;
+    n = k >> kshift;
+    if (n > nwds) {
+        n = nwds;
+    }
+    else if (n < nwds && (k &= kmask)) {
+        x1 = x2 = x[n];
+        x1 >>= k;
+        x1 <<= k;
+        if (x1 != x2) {
+            return 1;
+        }
+    }
+    x0 = x;
+    x += n;
+    while(x > x0)
+        if (*--x) {
+            return 1;
+        }
+    return 0;
+}
+
+enum {  /* rounding values: same as FLT_ROUNDS */
+    Round_zero = 0,
+    Round_near = 1,
+    Round_up = 2,
+    Round_down = 3
+};
+
+void
+#ifdef KR_headers
+gethex(sp, rvp, rounding, sign)
+CONST char **sp; U *rvp; int rounding, sign;
+#else
+gethex( CONST char **sp, U *rvp, int rounding, int sign)
+#endif
+{
+    Bigint *b;
+    CONST unsigned char *decpt, *s0, *s, *s1;
+    Long e, e1;
+    ULong L, lostbits, *x;
+    int big, denorm, esign, havedig, k, n, nbits, up, zret;
+#ifdef IBM
+    int j;
+#endif
+    enum {
+#ifdef IEEE_Arith /*{{*/
+        emax = 0x7fe - Bias - P + 1,
+        emin = Emin - P + 1
+#else /*}{*/
+        emin = Emin - P,
+#ifdef VAX
+        emax = 0x7ff - Bias - P + 1
+#endif
+#ifdef IBM
+               emax = 0x7f - Bias - P
+#endif
+#endif /*}}*/
+    };
+#ifdef USE_LOCALE
+    int i;
+#ifdef NO_LOCALE_CACHE
+    const unsigned char *decimalpoint = (unsigned char*)
+                                        localeconv()->decimal_point;
+#else
+    const unsigned char *decimalpoint;
+    static unsigned char *decimalpoint_cache;
+    if (!(s0 = decimalpoint_cache)) {
+        s0 = (unsigned char*)localeconv()->decimal_point;
+        if ((decimalpoint_cache = (unsigned char*)
+                                  MALLOC(strlen((CONST char*)s0) + 1))) {
+            strcpy((char*)decimalpoint_cache, (CONST char*)s0);
+            s0 = decimalpoint_cache;
+        }
+    }
+    decimalpoint = s0;
+#endif
+#endif
+
+    if (!hexdig['0']) {
+        hexdig_init();
+    }
+    havedig = 0;
+    s0 = *(CONST unsigned char **)sp + 2;
+    while(s0[havedig] == '0') {
+        havedig++;
+    }
+    s0 += havedig;
+    s = s0;
+    decpt = 0;
+    zret = 0;
+    e = 0;
+    if (hexdig[*s]) {
+        havedig++;
+    }
+    else {
+        zret = 1;
+#ifdef USE_LOCALE
+        for(i = 0; decimalpoint[i]; ++i) {
+            if (s[i] != decimalpoint[i]) {
+                goto pcheck;
+            }
+        }
+        decpt = s += i;
+#else
+        if (*s != '.') {
+            goto pcheck;
+        }
+        decpt = ++s;
+#endif
+        if (!hexdig[*s]) {
+            goto pcheck;
+        }
+        while(*s == '0') {
+            s++;
+        }
+        if (hexdig[*s]) {
+            zret = 0;
+        }
+        havedig = 1;
+        s0 = s;
+    }
+    while(hexdig[*s]) {
+        s++;
+    }
+#ifdef USE_LOCALE
+    if (*s == *decimalpoint && !decpt) {
+        for(i = 1; decimalpoint[i]; ++i) {
+            if (s[i] != decimalpoint[i]) {
+                goto pcheck;
+            }
+        }
+        decpt = s += i;
+#else
+    if (*s == '.' && !decpt) {
+        decpt = ++s;
+#endif
+        while(hexdig[*s]) {
+            s++;
+        }
+    }/*}*/
+    if (decpt) {
+        e = -(((Long)(s-decpt)) << 2);
+    }
+pcheck:
+    s1 = s;
+    big = esign = 0;
+    switch(*s) {
+        case 'p':
+        case 'P':
+            switch(*++s) {
+                case '-':
+                    esign = 1;
+                /* no break */
+                case '+':
+                    s++;
+            }
+            if ((n = hexdig[*s]) == 0 || n > 0x19) {
+                s = s1;
+                break;
+            }
+            e1 = n - 0x10;
+            while((n = hexdig[*++s]) !=0 && n <= 0x19) {
+                if (e1 & 0xf8000000) {
+                    big = 1;
+                }
+                e1 = 10*e1 + n - 0x10;
+            }
+            if (esign) {
+                e1 = -e1;
+            }
+            e += e1;
+    }
+    *sp = (char*)s;
+    if (!havedig) {
+        *sp = (char*)s0 - 1;
+    }
+    if (zret) {
+        goto retz1;
+    }
+    if (big) {
+        if (esign) {
+#ifdef IEEE_Arith
+            switch(rounding) {
+                case Round_up:
+                    if (sign) {
+                        break;
+                    }
+                    goto ret_tiny;
+                case Round_down:
+                    if (!sign) {
+                        break;
+                    }
+                    goto ret_tiny;
+            }
+#endif
+            goto retz;
+#ifdef IEEE_Arith
+ret_tiny:
+#ifndef NO_ERRNO
+            errno = ERANGE;
+#endif
+            word0(rvp) = 0;
+            word1(rvp) = 1;
+            return;
+#endif /* IEEE_Arith */
+        }
+        switch(rounding) {
+            case Round_near:
+                goto ovfl1;
+            case Round_up:
+                if (!sign) {
+                    goto ovfl1;
+                }
+                goto ret_big;
+            case Round_down:
+                if (sign) {
+                    goto ovfl1;
+                }
+                goto ret_big;
+        }
+ret_big:
+        word0(rvp) = Big0;
+        word1(rvp) = Big1;
+        return;
+    }
+    n = s1 - s0 - 1;
+    for(k = 0; n > (1 << (kshift-2)) - 1; n >>= 1) {
+        k++;
+    }
+    b = Balloc(k);
+    x = b->x;
+    n = 0;
+    L = 0;
+#ifdef USE_LOCALE
+    for(i = 0; decimalpoint[i+1]; ++i);
+#endif
+    while(s1 > s0) {
+#ifdef USE_LOCALE
+        if (*--s1 == decimalpoint[i]) {
+            s1 -= i;
+            continue;
+        }
+#else
+        if (*--s1 == '.') {
+            continue;
+        }
+#endif
+        if (n == ULbits) {
+            *x++ = L;
+            L = 0;
+            n = 0;
+        }
+        L |= (hexdig[*s1] & 0x0f) << n;
+        n += 4;
+    }
+    *x++ = L;
+    b->wds = n = x - b->x;
+    n = ULbits*n - hi0bits(L);
+    nbits = Nbits;
+    lostbits = 0;
+    x = b->x;
+    if (n > nbits) {
+        n -= nbits;
+        if (any_on(b,n)) {
+            lostbits = 1;
+            k = n - 1;
+            if (x[k>>kshift] & 1 << (k & kmask)) {
+                lostbits = 2;
+                if (k > 0 && any_on(b,k)) {
+                    lostbits = 3;
+                }
+            }
+        }
+        rshift(b, n);
+        e += n;
+    }
+    else if (n < nbits) {
+        n = nbits - n;
+        b = lshift(b, n);
+        e -= n;
+        x = b->x;
+    }
+    if (e > Emax) {
+ovfl:
+        Bfree(b);
+ovfl1:
+#ifndef NO_ERRNO
+        errno = ERANGE;
+#endif
+        word0(rvp) = Exp_mask;
+        word1(rvp) = 0;
+        return;
+    }
+    denorm = 0;
+    if (e < emin) {
+        denorm = 1;
+        n = emin - e;
+        if (n >= nbits) {
+#ifdef IEEE_Arith /*{*/
+            switch (rounding) {
+                case Round_near:
+                    if (n == nbits && (n < 2 || any_on(b,n-1))) {
+                        goto ret_tiny;
+                    }
+                    break;
+                case Round_up:
+                    if (!sign) {
+                        goto ret_tiny;
+                    }
+                    break;
+                case Round_down:
+                    if (sign) {
+                        goto ret_tiny;
+                    }
+            }
+#endif /* } IEEE_Arith */
+            Bfree(b);
+retz:
+#ifndef NO_ERRNO
+            errno = ERANGE;
+#endif
+retz1:
+            rvp->d = 0.;
+            return;
+        }
+        k = n - 1;
+        if (lostbits) {
+            lostbits = 1;
+        }
+        else if (k > 0) {
+            lostbits = any_on(b,k);
+        }
+        if (x[k>>kshift] & 1 << (k & kmask)) {
+            lostbits |= 2;
+        }
+        nbits -= n;
+        rshift(b,n);
+        e = emin;
+    }
+    if (lostbits) {
+        up = 0;
+        switch(rounding) {
+            case Round_zero:
+                break;
+            case Round_near:
+                if (lostbits & 2
+                    && (lostbits & 1) | (x[0] & 1)) {
+                    up = 1;
+                }
+                break;
+            case Round_up:
+                up = 1 - sign;
+                break;
+            case Round_down:
+                up = sign;
+        }
+        if (up) {
+            k = b->wds;
+            b = increment(b);
+            x = b->x;
+            if (denorm) {
+#if 0
+                if (nbits == Nbits - 1
+                    && x[nbits >> kshift] & 1 << (nbits & kmask)) {
+                    denorm = 0;    /* not currently used */
+                }
+#endif
+            }
+            else if (b->wds > k
+                     || ((n = nbits & kmask) !=0
+                         && hi0bits(x[k-1]) < 32-n)) {
+                rshift(b,1);
+                if (++e > Emax) {
+                    goto ovfl;
+                }
+            }
+        }
+    }
+#ifdef IEEE_Arith
+    if (denorm) {
+        word0(rvp) = b->wds > 1 ? b->x[1] & ~0x100000 : 0;
+    }
+    else {
+        word0(rvp) = (b->x[1] & ~0x100000) | ((e + 0x3ff + 52) << 20);
+    }
+    word1(rvp) = b->x[0];
+#endif
+#ifdef IBM
+    if ((j = e & 3)) {
+        k = b->x[0] & ((1 << j) - 1);
+        rshift(b,j);
+        if (k) {
+            switch(rounding) {
+                case Round_up:
+                    if (!sign) {
+                        increment(b);
+                    }
+                    break;
+                case Round_down:
+                    if (sign) {
+                        increment(b);
+                    }
+                    break;
+                case Round_near:
+                    j = 1 << (j-1);
+                    if (k & j && ((k & (j-1)) | lostbits)) {
+                        increment(b);
+                    }
+            }
+        }
+    }
+    e >>= 2;
+    word0(rvp) = b->x[1] | ((e + 65 + 13) << 24);
+    word1(rvp) = b->x[0];
+#endif
+#ifdef VAX
+    /* The next two lines ignore swap of low- and high-order 2 bytes. */
+    /* word0(rvp) = (b->x[1] & ~0x800000) | ((e + 129 + 55) << 23); */
+    /* word1(rvp) = b->x[0]; */
+    word0(rvp) = ((b->x[1] & ~0x800000) >> 16) | ((e + 129 + 55) << 7) | (b->x[1] << 16);
+    word1(rvp) = (b->x[0] >> 16) | (b->x[0] << 16);
+#endif
+    Bfree(b);
+}
+#endif /*!NO_HEX_FP}*/
+
+static int
+#ifdef KR_headers
+dshift(b, p2) Bigint *b; int p2;
+#else
+dshift(Bigint *b, int p2)
+#endif
+{
+    int rv = hi0bits(b->x[b->wds-1]) - 4;
+    if (p2 > 0) {
+        rv -= p2;
+    }
+    return rv & kmask;
+}
+
+static int
+quorem
+#ifdef KR_headers
+(b, S) Bigint *b, *S;
+#else
+(Bigint *b, Bigint *S)
+#endif
+{
+    int n;
+    ULong *bx, *bxe, q, *sx, *sxe;
+#ifdef ULLong
+    ULLong borrow, carry, y, ys;
+#else
+    ULong borrow, carry, y, ys;
+#ifdef Pack_32
+    ULong si, z, zs;
+#endif
+#endif
+
+    n = S->wds;
+#ifdef DEBUG
+    /*debug*/ if (b->wds > n)
+        /*debug*/{
+        Bug("oversize b in quorem");
+    }
+#endif
+    if (b->wds < n) {
+        return 0;
+    }
+    sx = S->x;
+    sxe = sx + --n;
+    bx = b->x;
+    bxe = bx + n;
+    q = *bxe / (*sxe + 1);  /* ensure q <= true quotient */
+#ifdef DEBUG
+#ifdef NO_STRTOD_BIGCOMP
+    /*debug*/ if (q > 9)
+#else
+    /* An oversized q is possible when quorem is called from bigcomp and */
+    /* the input is near, e.g., twice the smallest denormalized number. */
+    /*debug*/ if (q > 15)
+#endif
+        /*debug*/   Bug("oversized quotient in quorem");
+#endif
+    if (q) {
+        borrow = 0;
+        carry = 0;
+        do {
+#ifdef ULLong
+            ys = *sx++ * (ULLong)q + carry;
+            carry = ys >> 32;
+            y = *bx - (ys & FFFFFFFF) - borrow;
+            borrow = y >> 32 & (ULong)1;
+            *bx++ = y & FFFFFFFF;
+#else
+#ifdef Pack_32
+            si = *sx++;
+            ys = (si & 0xffff) * q + carry;
+            zs = (si >> 16) * q + (ys >> 16);
+            carry = zs >> 16;
+            y = (*bx & 0xffff) - (ys & 0xffff) - borrow;
+            borrow = (y & 0x10000) >> 16;
+            z = (*bx >> 16) - (zs & 0xffff) - borrow;
+            borrow = (z & 0x10000) >> 16;
+            Storeinc(bx, z, y);
+#else
+            ys = *sx++ * q + carry;
+            carry = ys >> 16;
+            y = *bx - (ys & 0xffff) - borrow;
+            borrow = (y & 0x10000) >> 16;
+            *bx++ = y & 0xffff;
+#endif
+#endif
+        }
+        while(sx <= sxe);
+        if (!*bxe) {
+            bx = b->x;
+            while(--bxe > bx && !*bxe) {
+                --n;
+            }
+            b->wds = n;
+        }
+    }
+    if (cmp(b, S) >= 0) {
+        q++;
+        borrow = 0;
+        carry = 0;
+        bx = b->x;
+        sx = S->x;
+        do {
+#ifdef ULLong
+            ys = *sx++ + carry;
+            carry = ys >> 32;
+            y = *bx - (ys & FFFFFFFF) - borrow;
+            borrow = y >> 32 & (ULong)1;
+            *bx++ = y & FFFFFFFF;
+#else
+#ifdef Pack_32
+            si = *sx++;
+            ys = (si & 0xffff) + carry;
+            zs = (si >> 16) + (ys >> 16);
+            carry = zs >> 16;
+            y = (*bx & 0xffff) - (ys & 0xffff) - borrow;
+            borrow = (y & 0x10000) >> 16;
+            z = (*bx >> 16) - (zs & 0xffff) - borrow;
+            borrow = (z & 0x10000) >> 16;
+            Storeinc(bx, z, y);
+#else
+            ys = *sx++ + carry;
+            carry = ys >> 16;
+            y = *bx - (ys & 0xffff) - borrow;
+            borrow = (y & 0x10000) >> 16;
+            *bx++ = y & 0xffff;
+#endif
+#endif
+        }
+        while(sx <= sxe);
+        bx = b->x;
+        bxe = bx + n;
+        if (!*bxe) {
+            while(--bxe > bx && !*bxe) {
+                --n;
+            }
+            b->wds = n;
+        }
+    }
+    return q;
+}
+
+#if defined(Avoid_Underflow) || !defined(NO_STRTOD_BIGCOMP) /*{*/
+static double
+sulp
+#ifdef KR_headers
+(x, bc) U *x; BCinfo *bc;
+#else
+(U *x, BCinfo *bc)
+#endif
+{
+    U u;
+    double rv;
+    int i;
+
+    rv = ulp(x);
+    if (!bc->scale || (i = 2*P + 1 - ((word0(x) & Exp_mask) >> Exp_shift)) <= 0) {
+        return rv;    /* Is there an example where i <= 0 ? */
+    }
+    word0(&u) = Exp_1 + (i << Exp_shift);
+    word1(&u) = 0;
+    return rv * u.d;
+}
+#endif /*}*/
+
+#ifndef NO_STRTOD_BIGCOMP
+static void
+bigcomp
+#ifdef KR_headers
+(rv, s0, bc)
+U *rv; CONST char *s0; BCinfo *bc;
+#else
+(U *rv, const char *s0, BCinfo *bc)
+#endif
+{
+    Bigint *b, *d;
+    int b2, bbits, d2, dd, dig, dsign, i, j, nd, nd0, p2, p5, speccase;
+
+    dsign = bc->dsign;
+    nd = bc->nd;
+    nd0 = bc->nd0;
+    p5 = nd + bc->e0 - 1;
+    speccase = 0;
+#ifndef Sudden_Underflow
+    if (rv->d == 0.) {  /* special case: value near underflow-to-zero */
+        /* threshold was rounded to zero */
+        b = i2b(1);
+        p2 = Emin - P + 1;
+        bbits = 1;
+#ifdef Avoid_Underflow
+        word0(rv) = (P+2) << Exp_shift;
+#else
+        word1(rv) = 1;
+#endif
+        i = 0;
+#ifdef Honor_FLT_ROUNDS
+        if (bc->rounding == 1)
+#endif
+        {
+            speccase = 1;
+            --p2;
+            dsign = 0;
+            goto have_i;
+        }
+    }
+    else
+#endif
+        b = d2b(rv, &p2, &bbits);
+#ifdef Avoid_Underflow
+    p2 -= bc->scale;
+#endif
+    /* floor(log2(rv)) == bbits - 1 + p2 */
+    /* Check for denormal case. */
+    i = P - bbits;
+    if (i > (j = P - Emin - 1 + p2)) {
+#ifdef Sudden_Underflow
+        Bfree(b);
+        b = i2b(1);
+        p2 = Emin;
+        i = P - 1;
+#ifdef Avoid_Underflow
+        word0(rv) = (1 + bc->scale) << Exp_shift;
+#else
+        word0(rv) = Exp_msk1;
+#endif
+        word1(rv) = 0;
+#else
+        i = j;
+#endif
+    }
+#ifdef Honor_FLT_ROUNDS
+    if (bc->rounding != 1) {
+        if (i > 0) {
+            b = lshift(b, i);
+        }
+        if (dsign) {
+            b = increment(b);
+        }
+    }
+    else
+#endif
+    {
+        b = lshift(b, ++i);
+        b->x[0] |= 1;
+    }
+#ifndef Sudden_Underflow
+have_i:
+#endif
+    p2 -= p5 + i;
+    d = i2b(1);
+    /* Arrange for convenient computation of quotients:
+     * shift left if necessary so divisor has 4 leading 0 bits.
+     */
+    if (p5 > 0) {
+        d = pow5mult(d, p5);
+    }
+    else if (p5 < 0) {
+        b = pow5mult(b, -p5);
+    }
+    if (p2 > 0) {
+        b2 = p2;
+        d2 = 0;
+    }
+    else {
+        b2 = 0;
+        d2 = -p2;
+    }
+    i = dshift(d, d2);
+    if ((b2 += i) > 0) {
+        b = lshift(b, b2);
+    }
+    if ((d2 += i) > 0) {
+        d = lshift(d, d2);
+    }
+
+    /* Now b/d = exactly half-way between the two floating-point values */
+    /* on either side of the input string.  Compute first digit of b/d. */
+
+    if (!(dig = quorem(b,d))) {
+        b = multadd(b, 10, 0);  /* very unlikely */
+        dig = quorem(b,d);
+    }
+
+    /* Compare b/d with s0 */
+
+    for(i = 0; i < nd0; ) {
+        if ((dd = s0[i++] - '0' - dig)) {
+            goto ret;
+        }
+        if (!b->x[0] && b->wds == 1) {
+            if (i < nd) {
+                dd = 1;
+            }
+            goto ret;
+        }
+        b = multadd(b, 10, 0);
+        dig = quorem(b,d);
+    }
+    for(j = bc->dp1; i++ < nd;) {
+        if ((dd = s0[j++] - '0' - dig)) {
+            goto ret;
+        }
+        if (!b->x[0] && b->wds == 1) {
+            if (i < nd) {
+                dd = 1;
+            }
+            goto ret;
+        }
+        b = multadd(b, 10, 0);
+        dig = quorem(b,d);
+    }
+    if (b->x[0] || b->wds > 1 || dig > 0) {
+        dd = -1;
+    }
+ret:
+    Bfree(b);
+    Bfree(d);
+#ifdef Honor_FLT_ROUNDS
+    if (bc->rounding != 1) {
+        if (dd < 0) {
+            if (bc->rounding == 0) {
+                if (!dsign) {
+                    goto retlow1;
+                }
+            }
+            else if (dsign) {
+                goto rethi1;
+            }
+        }
+        else if (dd > 0) {
+            if (bc->rounding == 0) {
+                if (dsign) {
+                    goto rethi1;
+                }
+                goto ret1;
+            }
+            if (!dsign) {
+                goto rethi1;
+            }
+            dval(rv) += 2.*sulp(rv,bc);
+        }
+        else {
+            bc->inexact = 0;
+            if (dsign) {
+                goto rethi1;
+            }
+        }
+    }
+    else
+#endif
+        if (speccase) {
+            if (dd <= 0) {
+                rv->d = 0.;
+            }
+        }
+        else if (dd < 0) {
+            if (!dsign) /* does not happen for round-near */
+retlow1:
+                dval(rv) -= sulp(rv,bc);
+        }
+        else if (dd > 0) {
+            if (dsign) {
+rethi1:
+                dval(rv) += sulp(rv,bc);
+            }
+        }
+        else {
+            /* Exact half-way case:  apply round-even rule. */
+            if ((j = ((word0(rv) & Exp_mask) >> Exp_shift) - bc->scale) <= 0) {
+                i = 1 - j;
+                if (i <= 31) {
+                    if (word1(rv) & (0x1 << i)) {
+                        goto odd;
+                    }
+                }
+                else if (word0(rv) & (0x1 << (i-32))) {
+                    goto odd;
+                }
+            }
+            else if (word1(rv) & 1) {
+odd:
+                if (dsign) {
+                    goto rethi1;
+                }
+                goto retlow1;
+            }
+        }
+
+#ifdef Honor_FLT_ROUNDS
+ret1:
+#endif
+    return;
+}
+#endif /* NO_STRTOD_BIGCOMP */
+
+double
+strtod
+#ifdef KR_headers
+(s00, se) CONST char *s00; char **se;
+#else
+(const char *s00, char **se)
+#endif
+{
+    int bb2, bb5, bbe, bd2, bd5, bbbits, bs2, c, e, e1;
+    int esign, i, j, k, nd, nd0, nf, nz, nz0, nz1, sign;
+    CONST char *s, *s0, *s1;
+    double aadj, aadj1;
+    Long L;
+    U aadj2, adj, rv, rv0;
+    ULong y, z;
+    BCinfo bc;
+    Bigint *bb, *bb1, *bd, *bd0, *bs, *delta;
+#ifdef Avoid_Underflow
+    ULong Lsb, Lsb1;
+#endif
+#ifdef SET_INEXACT
+    int oldinexact;
+#endif
+#ifndef NO_STRTOD_BIGCOMP
+    int req_bigcomp = 0;
+#endif
+#ifdef Honor_FLT_ROUNDS /*{*/
+#ifdef Trust_FLT_ROUNDS /*{{ only define this if FLT_ROUNDS really works! */
+    bc.rounding = Flt_Rounds;
+#else /*}{*/
+    bc.rounding = 1;
+    switch(fegetround()) {
+        case FE_TOWARDZERO:   bc.rounding = 0; break;
+        case FE_UPWARD:   bc.rounding = 2; break;
+        case FE_DOWNWARD: bc.rounding = 3;
+    }
+#endif /*}}*/
+#endif /*}*/
+#ifdef USE_LOCALE
+    CONST char *s2;
+#endif
+
+    sign = nz0 = nz1 = nz = bc.dplen = bc.uflchk = 0;
+    dval(&rv) = 0.;
+    for(s = s00;; s++) switch(*s) {
+            case '-':
+                sign = 1;
+            /* no break */
+            case '+':
+                if (*++s) {
+                    goto break2;
+                }
+            /* no break */
+            case 0:
+                goto ret0;
+            case '\t':
+            case '\n':
+            case '\v':
+            case '\f':
+            case '\r':
+            case ' ':
+                continue;
+            default:
+                goto break2;
+        }
+break2:
+    if (*s == '0') {
+#ifndef NO_HEX_FP /*{*/
+        switch(s[1]) {
+            case 'x':
+            case 'X':
+#ifdef Honor_FLT_ROUNDS
+                gethex(&s, &rv, bc.rounding, sign);
+#else
+                gethex(&s, &rv, 1, sign);
+#endif
+                goto ret;
+        }
+#endif /*}*/
+        nz0 = 1;
+        while(*++s == '0') ;
+        if (!*s) {
+            goto ret;
+        }
+    }
+    s0 = s;
+    y = z = 0;
+    for(nd = nf = 0; (c = *s) >= '0' && c <= '9'; nd++, s++)
+        if (nd < 9) {
+            y = 10*y + c - '0';
+        }
+        else if (nd < 16) {
+            z = 10*z + c - '0';
+        }
+    nd0 = nd;
+    bc.dp0 = bc.dp1 = s - s0;
+    for(s1 = s; s1 > s0 && *--s1 == '0'; ) {
+        ++nz1;
+    }
+#ifdef USE_LOCALE
+    s1 = localeconv()->decimal_point;
+    if (c == *s1) {
+        c = '.';
+        if (*++s1) {
+            s2 = s;
+            for(;;) {
+                if (*++s2 != *s1) {
+                    c = 0;
+                    break;
+                }
+                if (!*++s1) {
+                    s = s2;
+                    break;
+                }
+            }
+        }
+    }
+#endif
+    if (c == '.') {
+        c = *++s;
+        bc.dp1 = s - s0;
+        bc.dplen = bc.dp1 - bc.dp0;
+        if (!nd) {
+            for(; c == '0'; c = *++s) {
+                nz++;
+            }
+            if (c > '0' && c <= '9') {
+                bc.dp0 = s0 - s;
+                bc.dp1 = bc.dp0 + bc.dplen;
+                s0 = s;
+                nf += nz;
+                nz = 0;
+                goto have_dig;
+            }
+            goto dig_done;
+        }
+        for(; c >= '0' && c <= '9'; c = *++s) {
+have_dig:
+            nz++;
+            if (c -= '0') {
+                nf += nz;
+                for(i = 1; i < nz; i++)
+                    if (nd++ < 9) {
+                        y *= 10;
+                    }
+                    else if (nd <= DBL_DIG + 1) {
+                        z *= 10;
+                    }
+                if (nd++ < 9) {
+                    y = 10*y + c;
+                }
+                else if (nd <= DBL_DIG + 1) {
+                    z = 10*z + c;
+                }
+                nz = nz1 = 0;
+            }
+        }
+    }
+dig_done:
+    e = 0;
+    if (c == 'e' || c == 'E') {
+        if (!nd && !nz && !nz0) {
+            goto ret0;
+        }
+        s00 = s;
+        esign = 0;
+        switch(c = *++s) {
+            case '-':
+                esign = 1;
+            case '+':
+                c = *++s;
+        }
+        if (c >= '0' && c <= '9') {
+            while(c == '0') {
+                c = *++s;
+            }
+            if (c > '0' && c <= '9') {
+                L = c - '0';
+                s1 = s;
+                while((c = *++s) >= '0' && c <= '9') {
+                    L = 10*L + c - '0';
+                }
+                if (s - s1 > 8 || L > 19999)
+                    /* Avoid confusion from exponents
+                     * so large that e might overflow.
+                     */
+                {
+                    e = 19999;    /* safe for 16 bit ints */
+                }
+                else {
+                    e = (int)L;
+                }
+                if (esign) {
+                    e = -e;
+                }
+            }
+            else {
+                e = 0;
+            }
+        }
+        else {
+            s = s00;
+        }
+    }
+    if (!nd) {
+        if (!nz && !nz0) {
+#ifdef INFNAN_CHECK
+            /* Check for Nan and Infinity */
+            if (!bc.dplen)
+                switch(c) {
+                    case 'i':
+                    case 'I':
+                        if (match(&s,"nf")) {
+                            --s;
+                            if (!match(&s,"inity")) {
+                                ++s;
+                            }
+                            word0(&rv) = 0x7ff00000;
+                            word1(&rv) = 0;
+                            goto ret;
+                        }
+                        break;
+                    case 'n':
+                    case 'N':
+                        if (match(&s, "an")) {
+                            word0(&rv) = NAN_WORD0;
+                            word1(&rv) = NAN_WORD1;
+#ifndef No_Hex_NaN
+                            if (*s == '(') { /*)*/
+                                hexnan(&rv, &s);
+                            }
+#endif
+                            goto ret;
+                        }
+                }
+#endif /* INFNAN_CHECK */
+ret0:
+            s = s00;
+            sign = 0;
+        }
+        goto ret;
+    }
+    bc.e0 = e1 = e -= nf;
+
+    /* Now we have nd0 digits, starting at s0, followed by a
+     * decimal point, followed by nd-nd0 digits.  The number we're
+     * after is the integer represented by those digits times
+     * 10**e */
+
+    if (!nd0) {
+        nd0 = nd;
+    }
+    k = nd < DBL_DIG + 1 ? nd : DBL_DIG + 1;
+    dval(&rv) = y;
+    if (k > 9) {
+#ifdef SET_INEXACT
+        if (k > DBL_DIG) {
+            oldinexact = get_inexact();
+        }
+#endif
+        dval(&rv) = tens[k - 9] * dval(&rv) + z;
+    }
+    bd0 = 0;
+    if (nd <= DBL_DIG
+#ifndef RND_PRODQUOT
+#ifndef Honor_FLT_ROUNDS
+        && Flt_Rounds == 1
+#endif
+#endif
+       ) {
+        if (!e) {
+            goto ret;
+        }
+#ifndef ROUND_BIASED_without_Round_Up
+        if (e > 0) {
+            if (e <= Ten_pmax) {
+#ifdef VAX
+                goto vax_ovfl_check;
+#else
+#ifdef Honor_FLT_ROUNDS
+                /* round correctly FLT_ROUNDS = 2 or 3 */
+                if (sign) {
+                    rv.d = -rv.d;
+                    sign = 0;
+                }
+#endif
+                /* rv = */ rounded_product(dval(&rv), tens[e]);
+                goto ret;
+#endif
+            }
+            i = DBL_DIG - nd;
+            if (e <= Ten_pmax + i) {
+                /* A fancier test would sometimes let us do
+                 * this for larger i values.
+                 */
+#ifdef Honor_FLT_ROUNDS
+                /* round correctly FLT_ROUNDS = 2 or 3 */
+                if (sign) {
+                    rv.d = -rv.d;
+                    sign = 0;
+                }
+#endif
+                e -= i;
+                dval(&rv) *= tens[i];
+#ifdef VAX
+                /* VAX exponent range is so narrow we must
+                 * worry about overflow here...
+                 */
+vax_ovfl_check:
+                word0(&rv) -= P*Exp_msk1;
+                /* rv = */ rounded_product(dval(&rv), tens[e]);
+                if ((word0(&rv) & Exp_mask)
+                    > Exp_msk1*(DBL_MAX_EXP+Bias-1-P)) {
+                    goto ovfl;
+                }
+                word0(&rv) += P*Exp_msk1;
+#else
+                /* rv = */ rounded_product(dval(&rv), tens[e]);
+#endif
+                goto ret;
+            }
+        }
+#ifndef Inaccurate_Divide
+        else if (e >= -Ten_pmax) {
+#ifdef Honor_FLT_ROUNDS
+            /* round correctly FLT_ROUNDS = 2 or 3 */
+            if (sign) {
+                rv.d = -rv.d;
+                sign = 0;
+            }
+#endif
+            /* rv = */ rounded_quotient(dval(&rv), tens[-e]);
+            goto ret;
+        }
+#endif
+#endif /* ROUND_BIASED_without_Round_Up */
+    }
+    e1 += nd - k;
+
+#ifdef IEEE_Arith
+#ifdef SET_INEXACT
+    bc.inexact = 1;
+    if (k <= DBL_DIG) {
+        oldinexact = get_inexact();
+    }
+#endif
+#ifdef Avoid_Underflow
+    bc.scale = 0;
+#endif
+#ifdef Honor_FLT_ROUNDS
+    if (bc.rounding >= 2) {
+        if (sign) {
+            bc.rounding = bc.rounding == 2 ? 0 : 2;
+        }
+        else if (bc.rounding != 2) {
+            bc.rounding = 0;
+        }
+    }
+#endif
+#endif /*IEEE_Arith*/
+
+    /* Get starting approximation = rv * 10**e1 */
+
+    if (e1 > 0) {
+        if ((i = e1 & 15)) {
+            dval(&rv) *= tens[i];
+        }
+        if (e1 &= ~15) {
+            if (e1 > DBL_MAX_10_EXP) {
+ovfl:
+                /* Can't trust HUGE_VAL */
+#ifdef IEEE_Arith
+#ifdef Honor_FLT_ROUNDS
+                switch(bc.rounding) {
+                    case 0: /* toward 0 */
+                    case 3: /* toward -infinity */
+                        word0(&rv) = Big0;
+                        word1(&rv) = Big1;
+                        break;
+                    default:
+                        word0(&rv) = Exp_mask;
+                        word1(&rv) = 0;
+                }
+#else /*Honor_FLT_ROUNDS*/
+                word0(&rv) = Exp_mask;
+                word1(&rv) = 0;
+#endif /*Honor_FLT_ROUNDS*/
+#ifdef SET_INEXACT
+                /* set overflow bit */
+                dval(&rv0) = 1e300;
+                dval(&rv0) *= dval(&rv0);
+#endif
+#else /*IEEE_Arith*/
+                word0(&rv) = Big0;
+                word1(&rv) = Big1;
+#endif /*IEEE_Arith*/
+range_err:
+                if (bd0) {
+                    Bfree(bb);
+                    Bfree(bd);
+                    Bfree(bs);
+                    Bfree(bd0);
+                    Bfree(delta);
+                }
+#ifndef NO_ERRNO
+                errno = ERANGE;
+#endif
+                goto ret;
+            }
+            e1 >>= 4;
+            for(j = 0; e1 > 1; j++, e1 >>= 1)
+                if (e1 & 1) {
+                    dval(&rv) *= bigtens[j];
+                }
+            /* The last multiplication could overflow. */
+            word0(&rv) -= P*Exp_msk1;
+            dval(&rv) *= bigtens[j];
+            if ((z = word0(&rv) & Exp_mask)
+                > Exp_msk1*(DBL_MAX_EXP+Bias-P)) {
+                goto ovfl;
+            }
+            if (z > Exp_msk1*(DBL_MAX_EXP+Bias-1-P)) {
+                /* set to largest number */
+                /* (Can't trust DBL_MAX) */
+                word0(&rv) = Big0;
+                word1(&rv) = Big1;
+            }
+            else {
+                word0(&rv) += P*Exp_msk1;
+            }
+        }
+    }
+    else if (e1 < 0) {
+        e1 = -e1;
+        if ((i = e1 & 15)) {
+            dval(&rv) /= tens[i];
+        }
+        if (e1 >>= 4) {
+            if (e1 >= 1 << n_bigtens) {
+                goto undfl;
+            }
+#ifdef Avoid_Underflow
+            if (e1 & Scale_Bit) {
+                bc.scale = 2*P;
+            }
+            for(j = 0; e1 > 0; j++, e1 >>= 1)
+                if (e1 & 1) {
+                    dval(&rv) *= tinytens[j];
+                }
+            if (bc.scale && (j = 2*P + 1 - ((word0(&rv) & Exp_mask)
+                                            >> Exp_shift)) > 0) {
+                /* scaled rv is denormal; clear j low bits */
+                if (j >= 32) {
+                    if (j > 54) {
+                        goto undfl;
+                    }
+                    word1(&rv) = 0;
+                    if (j >= 53) {
+                        word0(&rv) = (P+2)*Exp_msk1;
+                    }
+                    else {
+                        word0(&rv) &= 0xffffffff << (j-32);
+                    }
+                }
+                else {
+                    word1(&rv) &= 0xffffffff << j;
+                }
+            }
+#else
+            for(j = 0; e1 > 1; j++, e1 >>= 1)
+                if (e1 & 1) {
+                    dval(&rv) *= tinytens[j];
+                }
+            /* The last multiplication could underflow. */
+            dval(&rv0) = dval(&rv);
+            dval(&rv) *= tinytens[j];
+            if (!dval(&rv)) {
+                dval(&rv) = 2.*dval(&rv0);
+                dval(&rv) *= tinytens[j];
+#endif
+            if (!dval(&rv)) {
+undfl:
+                dval(&rv) = 0.;
+                goto range_err;
+            }
+#ifndef Avoid_Underflow
+            word0(&rv) = Tiny0;
+            word1(&rv) = Tiny1;
+            /* The refinement below will clean
+             * this approximation up.
+             */
+        }
+#endif
+    }
+}
+
+/* Now the hard part -- adjusting rv to the correct value.*/
+
+/* Put digits into bd: true value = bd * 10^e */
+
+bc.nd = nd - nz1;
+#ifndef NO_STRTOD_BIGCOMP
+bc.nd0 = nd0;   /* Only needed if nd > strtod_diglim, but done here */
+/* to silence an erroneous warning about bc.nd0 */
+/* possibly not being initialized. */
+if (nd > strtod_diglim) {
+    /* ASSERT(strtod_diglim >= 18); 18 == one more than the */
+    /* minimum number of decimal digits to distinguish double values */
+    /* in IEEE arithmetic. */
+    i = j = 18;
+    if (i > nd0) {
+        j += bc.dplen;
+    }
+    for(;;) {
+        if (--j < bc.dp1 && j >= bc.dp0) {
+            j = bc.dp0 - 1;
+        }
+        if (s0[j] != '0') {
+            break;
+        }
+        --i;
+    }
+    e += nd - i;
+    nd = i;
+    if (nd0 > nd) {
+        nd0 = nd;
+    }
+    if (nd < 9) { /* must recompute y */
+        y = 0;
+        for(i = 0; i < nd0; ++i) {
+            y = 10*y + s0[i] - '0';
+        }
+        for(j = bc.dp1; i < nd; ++i) {
+            y = 10*y + s0[j++] - '0';
+        }
+    }
+}
+#endif
+bd0 = s2b(s0, nd0, nd, y, bc.dplen);
+
+for(;;) {
+    bd = Balloc(bd0->k);
+    Bcopy(bd, bd0);
+    bb = d2b(&rv, &bbe, &bbbits);   /* rv = bb * 2^bbe */
+    bs = i2b(1);
+
+    if (e >= 0) {
+        bb2 = bb5 = 0;
+        bd2 = bd5 = e;
+    }
+    else {
+        bb2 = bb5 = -e;
+        bd2 = bd5 = 0;
+    }
+    if (bbe >= 0) {
+        bb2 += bbe;
+    }
+    else {
+        bd2 -= bbe;
+    }
+    bs2 = bb2;
+#ifdef Honor_FLT_ROUNDS
+    if (bc.rounding != 1) {
+        bs2++;
+    }
+#endif
+#ifdef Avoid_Underflow
+    Lsb = LSB;
+    Lsb1 = 0;
+    j = bbe - bc.scale;
+    i = j + bbbits - 1; /* logb(rv) */
+    j = P + 1 - bbbits;
+    if (i < Emin) { /* denormal */
+        i = Emin - i;
+        j -= i;
+        if (i < 32) {
+            Lsb <<= i;
+        }
+        else if (i < 52) {
+            Lsb1 = Lsb << (i-32);
+        }
+        else {
+            Lsb1 = Exp_mask;
+        }
+    }
+#else /*Avoid_Underflow*/
+#ifdef Sudden_Underflow
+#ifdef IBM
+    j = 1 + 4*P - 3 - bbbits + ((bbe + bbbits - 1) & 3);
+#else
+    j = P + 1 - bbbits;
+#endif
+#else /*Sudden_Underflow*/
+    j = bbe;
+    i = j + bbbits - 1; /* logb(rv) */
+    if (i < Emin) { /* denormal */
+        j += P - Emin;
+    }
+    else {
+        j = P + 1 - bbbits;
+    }
+#endif /*Sudden_Underflow*/
+#endif /*Avoid_Underflow*/
+    bb2 += j;
+    bd2 += j;
+#ifdef Avoid_Underflow
+    bd2 += bc.scale;
+#endif
+    i = bb2 < bd2 ? bb2 : bd2;
+    if (i > bs2) {
+        i = bs2;
+    }
+    if (i > 0) {
+        bb2 -= i;
+        bd2 -= i;
+        bs2 -= i;
+    }
+    if (bb5 > 0) {
+        bs = pow5mult(bs, bb5);
+        bb1 = mult(bs, bb);
+        Bfree(bb);
+        bb = bb1;
+    }
+    if (bb2 > 0) {
+        bb = lshift(bb, bb2);
+    }
+    if (bd5 > 0) {
+        bd = pow5mult(bd, bd5);
+    }
+    if (bd2 > 0) {
+        bd = lshift(bd, bd2);
+    }
+    if (bs2 > 0) {
+        bs = lshift(bs, bs2);
+    }
+    delta = diff(bb, bd);
+    bc.dsign = delta->sign;
+    delta->sign = 0;
+    i = cmp(delta, bs);
+#ifndef NO_STRTOD_BIGCOMP /*{*/
+    if (bc.nd > nd && i <= 0) {
+        if (bc.dsign) {
+            /* Must use bigcomp(). */
+            req_bigcomp = 1;
+            break;
+        }
+#ifdef Honor_FLT_ROUNDS
+        if (bc.rounding != 1) {
+            if (i < 0) {
+                req_bigcomp = 1;
+                break;
+            }
+        }
+        else
+#endif
+            i = -1; /* Discarded digits make delta smaller. */
+    }
+#endif /*}*/
+#ifdef Honor_FLT_ROUNDS /*{*/
+    if (bc.rounding != 1) {
+        if (i < 0) {
+            /* Error is less than an ulp */
+            if (!delta->x[0] && delta->wds <= 1) {
+                /* exact */
+#ifdef SET_INEXACT
+                bc.inexact = 0;
+#endif
+                break;
+            }
+            if (bc.rounding) {
+                if (bc.dsign) {
+                    adj.d = 1.;
+                    goto apply_adj;
+                }
+            }
+            else if (!bc.dsign) {
+                adj.d = -1.;
+                if (!word1(&rv)
+                    && !(word0(&rv) & Frac_mask)) {
+                    y = word0(&rv) & Exp_mask;
+#ifdef Avoid_Underflow
+                    if (!bc.scale || y > 2*P*Exp_msk1)
+#else
+                    if (y)
+#endif
+                    {
+                        delta = lshift(delta,Log2P);
+                        if (cmp(delta, bs) <= 0) {
+                            adj.d = -0.5;
+                        }
+                    }
+                }
+apply_adj:
+#ifdef Avoid_Underflow /*{*/
+                if (bc.scale && (y = word0(&rv) & Exp_mask)
+                    <= 2*P*Exp_msk1) {
+                    word0(&adj) += (2*P+1)*Exp_msk1 - y;
+                }
+#else
+#ifdef Sudden_Underflow
+                if ((word0(&rv) & Exp_mask) <=
+                    P*Exp_msk1) {
+                    word0(&rv) += P*Exp_msk1;
+                    dval(&rv) += adj.d*ulp(dval(&rv));
+                    word0(&rv) -= P*Exp_msk1;
+                }
+                else
+#endif /*Sudden_Underflow*/
+#endif /*Avoid_Underflow}*/
+                dval(&rv) += adj.d*ulp(&rv);
+            }
+            break;
+        }
+        adj.d = ratio(delta, bs);
+        if (adj.d < 1.) {
+            adj.d = 1.;
+        }
+        if (adj.d <= 0x7ffffffe) {
+            /* adj = rounding ? ceil(adj) : floor(adj); */
+            y = adj.d;
+            if (y != adj.d) {
+                if (!((bc.rounding>>1) ^ bc.dsign)) {
+                    y++;
+                }
+                adj.d = y;
+            }
+        }
+#ifdef Avoid_Underflow /*{*/
+        if (bc.scale && (y = word0(&rv) & Exp_mask) <= 2*P*Exp_msk1) {
+            word0(&adj) += (2*P+1)*Exp_msk1 - y;
+        }
+#else
+#ifdef Sudden_Underflow
+        if ((word0(&rv) & Exp_mask) <= P*Exp_msk1) {
+            word0(&rv) += P*Exp_msk1;
+            adj.d *= ulp(dval(&rv));
+            if (bc.dsign) {
+                dval(&rv) += adj.d;
+            }
+            else {
+                dval(&rv) -= adj.d;
+            }
+            word0(&rv) -= P*Exp_msk1;
+            goto cont;
+        }
+#endif /*Sudden_Underflow*/
+#endif /*Avoid_Underflow}*/
+        adj.d *= ulp(&rv);
+        if (bc.dsign) {
+            if (word0(&rv) == Big0 && word1(&rv) == Big1) {
+                goto ovfl;
+            }
+            dval(&rv) += adj.d;
+        }
+        else {
+            dval(&rv) -= adj.d;
+        }
+        goto cont;
+    }
+#endif /*}Honor_FLT_ROUNDS*/
+
+    if (i < 0) {
+        /* Error is less than half an ulp -- check for
+         * special case of mantissa a power of two.
+         */
+        if (bc.dsign || word1(&rv) || word0(&rv) & Bndry_mask
+#ifdef IEEE_Arith /*{*/
+#ifdef Avoid_Underflow
+            || (word0(&rv) & Exp_mask) <= (2*P+1)*Exp_msk1
+#else
+            || (word0(&rv) & Exp_mask) <= Exp_msk1
+#endif
+#endif /*}*/
+           ) {
+#ifdef SET_INEXACT
+            if (!delta->x[0] && delta->wds <= 1) {
+                bc.inexact = 0;
+            }
+#endif
+            break;
+        }
+        if (!delta->x[0] && delta->wds <= 1) {
+            /* exact result */
+#ifdef SET_INEXACT
+            bc.inexact = 0;
+#endif
+            break;
+        }
+        delta = lshift(delta,Log2P);
+        if (cmp(delta, bs) > 0) {
+            goto drop_down;
+        }
+        break;
+    }
+    if (i == 0) {
+        /* exactly half-way between */
+        if (bc.dsign) {
+            if ((word0(&rv) & Bndry_mask1) == Bndry_mask1
+                &&  word1(&rv) == (
+#ifdef Avoid_Underflow
+                    (bc.scale && (y = word0(&rv) & Exp_mask) <= 2*P*Exp_msk1)
+                    ? (0xffffffff & (0xffffffff << (2*P+1-(y>>Exp_shift)))) :
+#endif
+                    0xffffffff)) {
+                /*boundary case -- increment exponent*/
+                if (word0(&rv) == Big0 && word1(&rv) == Big1) {
+                    goto ovfl;
+                }
+                word0(&rv) = (word0(&rv) & Exp_mask)
+                             + Exp_msk1
+#ifdef IBM
+                             | Exp_msk1 >> 4
+#endif
+                             ;
+                word1(&rv) = 0;
+#ifdef Avoid_Underflow
+                bc.dsign = 0;
+#endif
+                break;
+            }
+        }
+        else if (!(word0(&rv) & Bndry_mask) && !word1(&rv)) {
+drop_down:
+            /* boundary case -- decrement exponent */
+#ifdef Sudden_Underflow /*{{*/
+            L = word0(&rv) & Exp_mask;
+#ifdef IBM
+            if (L <  Exp_msk1)
+#else
+#ifdef Avoid_Underflow
+            if (L <= (bc.scale ? (2*P+1)*Exp_msk1 : Exp_msk1))
+#else
+            if (L <= Exp_msk1)
+#endif /*Avoid_Underflow*/
+#endif /*IBM*/
+            {
+                if (bc.nd >nd) {
+                    bc.uflchk = 1;
+                    break;
+                }
+                goto undfl;
+            }
+            L -= Exp_msk1;
+#else /*Sudden_Underflow}{*/
+#ifdef Avoid_Underflow
+            if (bc.scale) {
+                L = word0(&rv) & Exp_mask;
+                if (L <= (2*P+1)*Exp_msk1) {
+                    if (L > (P+2)*Exp_msk1)
+                        /* round even ==> */
+                        /* accept rv */
+                    {
+                        break;
+                    }
+                    /* rv = smallest denormal */
+                    if (bc.nd >nd) {
+                        bc.uflchk = 1;
+                        break;
+                    }
+                    goto undfl;
+                }
+            }
+#endif /*Avoid_Underflow*/
+            L = (word0(&rv) & Exp_mask) - Exp_msk1;
+#endif /*Sudden_Underflow}}*/
+            word0(&rv) = L | Bndry_mask1;
+            word1(&rv) = 0xffffffff;
+#ifdef IBM
+            goto cont;
+#else
+#ifndef NO_STRTOD_BIGCOMP
+            if (bc.nd > nd) {
+                goto cont;
+            }
+#endif
+            break;
+#endif
+        }
+#ifndef ROUND_BIASED
+#ifdef Avoid_Underflow
+        if (Lsb1) {
+            if (!(word0(&rv) & Lsb1)) {
+                break;
+            }
+        }
+        else if (!(word1(&rv) & Lsb)) {
+            break;
+        }
+#else
+        if (!(word1(&rv) & LSB)) {
+            break;
+        }
+#endif
+#endif
+        if (bc.dsign)
+#ifdef Avoid_Underflow
+            dval(&rv) += sulp(&rv, &bc);
+#else
+            dval(&rv) += ulp(&rv);
+#endif
+#ifndef ROUND_BIASED
+        else {
+#ifdef Avoid_Underflow
+            dval(&rv) -= sulp(&rv, &bc);
+#else
+            dval(&rv) -= ulp(&rv);
+#endif
+#ifndef Sudden_Underflow
+            if (!dval(&rv)) {
+                if (bc.nd >nd) {
+                    bc.uflchk = 1;
+                    break;
+                }
+                goto undfl;
+            }
+#endif
+        }
+#ifdef Avoid_Underflow
+        bc.dsign = 1 - bc.dsign;
+#endif
+#endif
+        break;
+    }
+    if ((aadj = ratio(delta, bs)) <= 2.) {
+        if (bc.dsign) {
+            aadj = aadj1 = 1.;
+        }
+        else if (word1(&rv) || word0(&rv) & Bndry_mask) {
+#ifndef Sudden_Underflow
+            if (word1(&rv) == Tiny1 && !word0(&rv)) {
+                if (bc.nd >nd) {
+                    bc.uflchk = 1;
+                    break;
+                }
+                goto undfl;
+            }
+#endif
+            aadj = 1.;
+            aadj1 = -1.;
+        }
+        else {
+            /* special case -- power of FLT_RADIX to be */
+            /* rounded down... */
+
+            if (aadj < 2./FLT_RADIX) {
+                aadj = 1./FLT_RADIX;
+            }
+            else {
+                aadj *= 0.5;
+            }
+            aadj1 = -aadj;
+        }
+    }
+    else {
+        aadj *= 0.5;
+        aadj1 = bc.dsign ? aadj : -aadj;
+#ifdef Check_FLT_ROUNDS
+        switch(bc.rounding) {
+            case 2: /* towards +infinity */
+                aadj1 -= 0.5;
+                break;
+            case 0: /* towards 0 */
+            case 3: /* towards -infinity */
+                aadj1 += 0.5;
+        }
+#else
+        if (Flt_Rounds == 0) {
+            aadj1 += 0.5;
+        }
+#endif /*Check_FLT_ROUNDS*/
+    }
+    y = word0(&rv) & Exp_mask;
+
+    /* Check for overflow */
+
+    if (y == Exp_msk1*(DBL_MAX_EXP+Bias-1)) {
+        dval(&rv0) = dval(&rv);
+        word0(&rv) -= P*Exp_msk1;
+        adj.d = aadj1 * ulp(&rv);
+        dval(&rv) += adj.d;
+        if ((word0(&rv) & Exp_mask) >=
+            Exp_msk1*(DBL_MAX_EXP+Bias-P)) {
+            if (word0(&rv0) == Big0 && word1(&rv0) == Big1) {
+                goto ovfl;
+            }
+            word0(&rv) = Big0;
+            word1(&rv) = Big1;
+            goto cont;
+        }
+        else {
+            word0(&rv) += P*Exp_msk1;
+        }
+    }
+    else {
+#ifdef Avoid_Underflow
+        if (bc.scale && y <= 2*P*Exp_msk1) {
+            if (aadj <= 0x7fffffff) {
+                if ((z = aadj) <= 0) {
+                    z = 1;
+                }
+                aadj = z;
+                aadj1 = bc.dsign ? aadj : -aadj;
+            }
+            dval(&aadj2) = aadj1;
+            word0(&aadj2) += (2*P+1)*Exp_msk1 - y;
+            aadj1 = dval(&aadj2);
+            adj.d = aadj1 * ulp(&rv);
+            dval(&rv) += adj.d;
+            if (rv.d == 0.)
+#ifdef NO_STRTOD_BIGCOMP
+                goto undfl;
+#else
+            {
+                if (bc.nd > nd) {
+                    bc.dsign = 1;
+                }
+                break;
+            }
+#endif
+        }
+        else {
+            adj.d = aadj1 * ulp(&rv);
+            dval(&rv) += adj.d;
+        }
+#else
+#ifdef Sudden_Underflow
+        if ((word0(&rv) & Exp_mask) <= P*Exp_msk1) {
+            dval(&rv0) = dval(&rv);
+            word0(&rv) += P*Exp_msk1;
+            adj.d = aadj1 * ulp(&rv);
+            dval(&rv) += adj.d;
+#ifdef IBM
+            if ((word0(&rv) & Exp_mask) <  P*Exp_msk1)
+#else
+            if ((word0(&rv) & Exp_mask) <= P*Exp_msk1)
+#endif
+            {
+                if (word0(&rv0) == Tiny0
+                    && word1(&rv0) == Tiny1) {
+                    if (bc.nd >nd) {
+                        bc.uflchk = 1;
+                        break;
+                    }
+                    goto undfl;
+                }
+                word0(&rv) = Tiny0;
+                word1(&rv) = Tiny1;
+                goto cont;
+            }
+            else {
+                word0(&rv) -= P*Exp_msk1;
+            }
+        }
+        else {
+            adj.d = aadj1 * ulp(&rv);
+            dval(&rv) += adj.d;
+        }
+#else /*Sudden_Underflow*/
+        /* Compute adj so that the IEEE rounding rules will
+         * correctly round rv + adj in some half-way cases.
+         * If rv * ulp(rv) is denormalized (i.e.,
+         * y <= (P-1)*Exp_msk1), we must adjust aadj to avoid
+         * trouble from bits lost to denormalization;
+         * example: 1.2e-307 .
+         */
+        if (y <= (P-1)*Exp_msk1 && aadj > 1.) {
+            aadj1 = (double)(int)(aadj + 0.5);
+            if (!bc.dsign) {
+                aadj1 = -aadj1;
+            }
+        }
+        adj.d = aadj1 * ulp(&rv);
+        dval(&rv) += adj.d;
+#endif /*Sudden_Underflow*/
+#endif /*Avoid_Underflow*/
+    }
+    z = word0(&rv) & Exp_mask;
+#ifndef SET_INEXACT
+    if (bc.nd == nd) {
+#ifdef Avoid_Underflow
+        if (!bc.scale)
+#endif
+            if (y == z) {
+                /* Can we stop now? */
+                L = (Long)aadj;
+                aadj -= L;
+                /* The tolerances below are conservative. */
+                if (bc.dsign || word1(&rv) || word0(&rv) & Bndry_mask) {
+                    if (aadj < .4999999 || aadj > .5000001) {
+                        break;
+                    }
+                }
+                else if (aadj < .4999999/FLT_RADIX) {
+                    break;
+                }
+            }
+    }
+#endif
+cont:
+    Bfree(bb);
+    Bfree(bd);
+    Bfree(bs);
+    Bfree(delta);
+}
+Bfree(bb);
+Bfree(bd);
+Bfree(bs);
+Bfree(bd0);
+Bfree(delta);
+#ifndef NO_STRTOD_BIGCOMP
+if (req_bigcomp) {
+    bd0 = 0;
+    bc.e0 += nz1;
+    bigcomp(&rv, s0, &bc);
+    y = word0(&rv) & Exp_mask;
+    if (y == Exp_mask) {
+        goto ovfl;
+    }
+    if (y == 0 && rv.d == 0.) {
+        goto undfl;
+    }
+}
+#endif
+#ifdef SET_INEXACT
+if (bc.inexact) {
+    if (!oldinexact) {
+        word0(&rv0) = Exp_1 + (70 << Exp_shift);
+        word1(&rv0) = 0;
+        dval(&rv0) += 1.;
+    }
+}
+else if (!oldinexact) {
+    clear_inexact();
+}
+#endif
+#ifdef Avoid_Underflow
+if (bc.scale) {
+    word0(&rv0) = Exp_1 - 2*P*Exp_msk1;
+    word1(&rv0) = 0;
+    dval(&rv) *= dval(&rv0);
+#ifndef NO_ERRNO
+    /* try to avoid the bug of testing an 8087 register value */
+#ifdef IEEE_Arith
+    if (!(word0(&rv) & Exp_mask))
+#else
+    if (word0(&rv) == 0 && word1(&rv) == 0)
+#endif
+        errno = ERANGE;
+#endif
+}
+#endif /* Avoid_Underflow */
+#ifdef SET_INEXACT
+if (bc.inexact && !(word0(&rv) & Exp_mask)) {
+    /* set underflow bit */
+    dval(&rv0) = 1e-300;
+    dval(&rv0) *= dval(&rv0);
+}
+#endif
+ret:
+if (se) {
+    *se = (char *)s;
+}
+return sign ? -dval(&rv) : dval(&rv);
+}
+
+#ifndef MULTIPLE_THREADS
+static char *dtoa_result;
+#endif
+
+static char *
+#ifdef KR_headers
+rv_alloc(i) int i;
+#else
+rv_alloc(int i)
+#endif
+{
+    int j, k, *r;
+
+    j = sizeof(ULong);
+    for(k = 0;
+        sizeof(Bigint) - sizeof(ULong) - sizeof(int) + j <= i;
+        j <<= 1) {
+        k++;
+    }
+    r = (int*)Balloc(k);
+    *r = k;
+    return
+#ifndef MULTIPLE_THREADS
+        dtoa_result =
+#endif
+            (char *)(r+1);
+}
+
+static char *
+#ifdef KR_headers
+nrv_alloc(s, rve, n) char *s, **rve; int n;
+#else
+nrv_alloc(const char *s, char **rve, int n)
+#endif
+{
+    char *rv, *t;
+
+    t = rv = rv_alloc(n);
+    while((*t = *s++)) {
+        t++;
+    }
+    if (rve) {
+        *rve = t;
+    }
+    return rv;
+}
+
+/* freedtoa(s) must be used to free values s returned by dtoa
+ * when MULTIPLE_THREADS is #defined.  It should be used in all cases,
+ * but for consistency with earlier versions of dtoa, it is optional
+ * when MULTIPLE_THREADS is not defined.
+ */
+
+void
+#ifdef KR_headers
+freedtoa(s) char *s;
+#else
+freedtoa(char *s)
+#endif
+{
+    Bigint *b = (Bigint *)((int *)s - 1);
+    b->maxwds = 1 << (b->k = *(int*)b);
+    Bfree(b);
+#ifndef MULTIPLE_THREADS
+    if (s == dtoa_result) {
+        dtoa_result = 0;
+    }
+#endif
+}
+
+/* dtoa for IEEE arithmetic (dmg): convert double to ASCII string.
+ *
+ * Inspired by "How to Print Floating-Point Numbers Accurately" by
+ * Guy L. Steele, Jr. and Jon L. White [Proc. ACM SIGPLAN '90, pp. 112-126].
+ *
+ * Modifications:
+ *  1. Rather than iterating, we use a simple numeric overestimate
+ *     to determine k = floor(log10(d)).  We scale relevant
+ *     quantities using O(log2(k)) rather than O(k) multiplications.
+ *  2. For some modes > 2 (corresponding to ecvt and fcvt), we don't
+ *     try to generate digits strictly left to right.  Instead, we
+ *     compute with fewer bits and propagate the carry if necessary
+ *     when rounding the final digit up.  This is often faster.
+ *  3. Under the assumption that input will be rounded nearest,
+ *     mode 0 renders 1e23 as 1e23 rather than 9.999999999999999e22.
+ *     That is, we allow equality in stopping tests when the
+ *     round-nearest rule will give the same floating-point value
+ *     as would satisfaction of the stopping test with strict
+ *     inequality.
+ *  4. We remove common factors of powers of 2 from relevant
+ *     quantities.
+ *  5. When converting floating-point integers less than 1e16,
+ *     we use floating-point arithmetic rather than resorting
+ *     to multiple-precision integers.
+ *  6. When asked to produce fewer than 15 digits, we first try
+ *     to get by with floating-point arithmetic; we resort to
+ *     multiple-precision integer arithmetic only if we cannot
+ *     guarantee that the floating-point calculation has given
+ *     the correctly rounded result.  For k requested digits and
+ *     "uniformly" distributed input, the probability is
+ *     something like 10^(k-15) that we must resort to the Long
+ *     calculation.
+ */
+
+char *
+dtoa
+#ifdef KR_headers
+(dd, mode, ndigits, decpt, sign, rve)
+double dd; int mode, ndigits, *decpt, *sign; char **rve;
+#else
+(double dd, int mode, int ndigits, int *decpt, int *sign, char **rve)
+#endif
+{
+    /* Arguments ndigits, decpt, sign are similar to those
+    of ecvt and fcvt; trailing zeros are suppressed from
+    the returned string.  If not null, *rve is set to point
+    to the end of the return value.  If d is +-Infinity or NaN,
+    then *decpt is set to 9999.
+
+    mode:
+       0 ==> shortest string that yields d when read in
+           and rounded to nearest.
+       1 ==> like 0, but with Steele & White stopping rule;
+           e.g. with IEEE P754 arithmetic , mode 0 gives
+           1e23 whereas mode 1 gives 9.999999999999999e22.
+       2 ==> max(1,ndigits) significant digits.  This gives a
+           return value similar to that of ecvt, except
+           that trailing zeros are suppressed.
+       3 ==> through ndigits past the decimal point.  This
+           gives a return value similar to that from fcvt,
+           except that trailing zeros are suppressed, and
+           ndigits can be negative.
+       4,5 ==> similar to 2 and 3, respectively, but (in
+           round-nearest mode) with the tests of mode 0 to
+           possibly return a shorter string that rounds to d.
+           With IEEE arithmetic and compilation with
+           -DHonor_FLT_ROUNDS, modes 4 and 5 behave the same
+           as modes 2 and 3 when FLT_ROUNDS != 1.
+       6-9 ==> Debugging modes similar to mode - 4:  don't try
+           fast floating-point estimate (if applicable).
+
+       Values of mode other than 0-9 are treated as mode 0.
+
+       Sufficient space is allocated to the return value
+       to hold the suppressed trailing zeros.
+    */
+
+    int bbits, b2, b5, be, dig, i, ieps, ilim, ilim0, ilim1,
+        j, j1, k, k0, k_check, leftright, m2, m5, s2, s5,
+        spec_case, try_quick;
+    Long L;
+#ifndef Sudden_Underflow
+    int denorm;
+    ULong x;
+#endif
+    Bigint *b, *b1, *delta, *mlo, *mhi, *S;
+    U d2, eps, u;
+    double ds;
+    char *s, *s0;
+#ifndef No_leftright
+#ifdef IEEE_Arith
+    U eps1;
+#endif
+#endif
+#ifdef SET_INEXACT
+    int inexact, oldinexact;
+#endif
+#ifdef Honor_FLT_ROUNDS /*{*/
+    int Rounding;
+#ifdef Trust_FLT_ROUNDS /*{{ only define this if FLT_ROUNDS really works! */
+    Rounding = Flt_Rounds;
+#else /*}{*/
+    Rounding = 1;
+    switch(fegetround()) {
+        case FE_TOWARDZERO:   Rounding = 0; break;
+        case FE_UPWARD:   Rounding = 2; break;
+        case FE_DOWNWARD: Rounding = 3;
+    }
+#endif /*}}*/
+#endif /*}*/
+
+#ifndef MULTIPLE_THREADS
+    if (dtoa_result) {
+        freedtoa(dtoa_result);
+        dtoa_result = 0;
+    }
+#endif
+
+    u.d = dd;
+    if (word0(&u) & Sign_bit) {
+        /* set sign for everything, including 0's and NaNs */
+        *sign = 1;
+        word0(&u) &= ~Sign_bit; /* clear sign bit */
+    }
+    else {
+        *sign = 0;
+    }
+
+#if defined(IEEE_Arith) + defined(VAX)
+#ifdef IEEE_Arith
+    if ((word0(&u) & Exp_mask) == Exp_mask)
+#else
+    if (word0(&u)  == 0x8000)
+#endif
+    {
+        /* Infinity or NaN */
+        *decpt = 9999;
+#ifdef IEEE_Arith
+        if (!word1(&u) && !(word0(&u) & 0xfffff)) {
+            return nrv_alloc("Infinity", rve, 8);
+        }
+#endif
+        return nrv_alloc("NaN", rve, 3);
+    }
+#endif
+#ifdef IBM
+    dval(&u) += 0; /* normalize */
+#endif
+    if (!dval(&u)) {
+        *decpt = 1;
+        return nrv_alloc("0", rve, 1);
+    }
+
+#ifdef SET_INEXACT
+    try_quick = oldinexact = get_inexact();
+    inexact = 1;
+#endif
+#ifdef Honor_FLT_ROUNDS
+    if (Rounding >= 2) {
+        if (*sign) {
+            Rounding = Rounding == 2 ? 0 : 2;
+        }
+        else if (Rounding != 2) {
+            Rounding = 0;
+        }
+    }
+#endif
+
+    b = d2b(&u, &be, &bbits);
+#ifdef Sudden_Underflow
+    i = (int)(word0(&u) >> Exp_shift1 & (Exp_mask>>Exp_shift1));
+#else
+    if ((i = (int)(word0(&u) >> Exp_shift1 & (Exp_mask>>Exp_shift1)))) {
+#endif
+    dval(&d2) = dval(&u);
+    word0(&d2) &= Frac_mask1;
+    word0(&d2) |= Exp_11;
+#ifdef IBM
+    if (j = 11 - hi0bits(word0(&d2) & Frac_mask)) {
+        dval(&d2) /= 1 << j;
+    }
+#endif
+
+    /* log(x)   ~=~ log(1.5) + (x-1.5)/1.5
+     * log10(x)  =  log(x) / log(10)
+     *      ~=~ log(1.5)/log(10) + (x-1.5)/(1.5*log(10))
+     * log10(d) = (i-Bias)*log(2)/log(10) + log10(d2)
+     *
+     * This suggests computing an approximation k to log10(d) by
+     *
+     * k = (i - Bias)*0.301029995663981
+     *  + ( (d2-1.5)*0.289529654602168 + 0.176091259055681 );
+     *
+     * We want k to be too large rather than too small.
+     * The error in the first-order Taylor series approximation
+     * is in our favor, so we just round up the constant enough
+     * to compensate for any error in the multiplication of
+     * (i - Bias) by 0.301029995663981; since |i - Bias| <= 1077,
+     * and 1077 * 0.30103 * 2^-52 ~=~ 7.2e-14,
+     * adding 1e-13 to the constant term more than suffices.
+     * Hence we adjust the constant term to 0.1760912590558.
+     * (We could get a more accurate k by invoking log10,
+     *  but this is probably not worthwhile.)
+     */
+
+    i -= Bias;
+#ifdef IBM
+    i <<= 2;
+    i += j;
+#endif
+#ifndef Sudden_Underflow
+    denorm = 0;
+}
+else {
+    /* d is denormalized */
+
+    i = bbits + be + (Bias + (P-1) - 1);
+    x = i > 32  ? word0(&u) << (64 - i) | word1(&u) >> (i - 32)
+        : word1(&u) << (32 - i);
+    dval(&d2) = x;
+    word0(&d2) -= 31*Exp_msk1; /* adjust exponent */
+    i -= (Bias + (P-1) - 1) + 1;
+    denorm = 1;
+}
+#endif
+ds = (dval(&d2)-1.5)*0.289529654602168 + 0.1760912590558 + i*0.301029995663981;
+k = (int)ds;
+if (ds < 0. && ds != k) {
+    k--;    /* want k = floor(ds) */
+}
+k_check = 1;
+if (k >= 0 && k <= Ten_pmax) {
+    if (dval(&u) < tens[k]) {
+        k--;
+    }
+    k_check = 0;
+}
+j = bbits - i - 1;
+if (j >= 0) {
+    b2 = 0;
+    s2 = j;
+}
+else {
+    b2 = -j;
+    s2 = 0;
+}
+if (k >= 0) {
+    b5 = 0;
+    s5 = k;
+    s2 += k;
+}
+else {
+    b2 -= k;
+    b5 = -k;
+    s5 = 0;
+}
+if (mode < 0 || mode > 9) {
+    mode = 0;
+}
+
+#ifndef SET_INEXACT
+#ifdef Check_FLT_ROUNDS
+try_quick = Rounding == 1;
+#else
+try_quick = 1;
+#endif
+#endif /*SET_INEXACT*/
+
+if (mode > 5) {
+    mode -= 4;
+    try_quick = 0;
+}
+leftright = 1;
+ilim = ilim1 = -1;  /* Values for cases 0 and 1; done here to */
+/* silence erroneous "gcc -Wall" warning. */
+switch(mode) {
+case 0:
+case 1:
+    i = 18;
+    ndigits = 0;
+    break;
+case 2:
+    leftright = 0;
+/* no break */
+case 4:
+    if (ndigits <= 0) {
+        ndigits = 1;
+    }
+    ilim = ilim1 = i = ndigits;
+    break;
+case 3:
+    leftright = 0;
+/* no break */
+case 5:
+    i = ndigits + k + 1;
+    ilim = i;
+    ilim1 = i - 1;
+    if (i <= 0) {
+        i = 1;
+    }
+}
+s = s0 = rv_alloc(i);
+
+#ifdef Honor_FLT_ROUNDS
+if (mode > 1 && Rounding != 1) {
+    leftright = 0;
+}
+#endif
+
+if (ilim >= 0 && ilim <= Quick_max && try_quick) {
+
+    /* Try to get by with floating-point arithmetic. */
+
+    i = 0;
+    dval(&d2) = dval(&u);
+    k0 = k;
+    ilim0 = ilim;
+    ieps = 2; /* conservative */
+    if (k > 0) {
+        ds = tens[k&0xf];
+        j = k >> 4;
+        if (j & Bletch) {
+            /* prevent overflows */
+            j &= Bletch - 1;
+            dval(&u) /= bigtens[n_bigtens-1];
+            ieps++;
+        }
+        for(; j; j >>= 1, i++)
+            if (j & 1) {
+                ieps++;
+                ds *= bigtens[i];
+            }
+        dval(&u) /= ds;
+    }
+    else if ((j1 = -k)) {
+        dval(&u) *= tens[j1 & 0xf];
+        for(j = j1 >> 4; j; j >>= 1, i++)
+            if (j & 1) {
+                ieps++;
+                dval(&u) *= bigtens[i];
+            }
+    }
+    if (k_check && dval(&u) < 1. && ilim > 0) {
+        if (ilim1 <= 0) {
+            goto fast_failed;
+        }
+        ilim = ilim1;
+        k--;
+        dval(&u) *= 10.;
+        ieps++;
+    }
+    dval(&eps) = ieps*dval(&u) + 7.;
+    word0(&eps) -= (P-1)*Exp_msk1;
+    if (ilim == 0) {
+        S = mhi = 0;
+        dval(&u) -= 5.;
+        if (dval(&u) > dval(&eps)) {
+            goto one_digit;
+        }
+        if (dval(&u) < -dval(&eps)) {
+            goto no_digits;
+        }
+        goto fast_failed;
+    }
+#ifndef No_leftright
+    if (leftright) {
+        /* Use Steele & White method of only
+         * generating digits needed.
+         */
+        dval(&eps) = 0.5/tens[ilim-1] - dval(&eps);
+#ifdef IEEE_Arith
+        if (k0 < 0 && j1 >= 307) {
+            eps1.d = 1.01e256; /* 1.01 allows roundoff in the next few lines */
+            word0(&eps1) -= Exp_msk1 * (Bias+P-1);
+            dval(&eps1) *= tens[j1 & 0xf];
+            for(i = 0, j = (j1-256) >> 4; j; j >>= 1, i++)
+                if (j & 1) {
+                    dval(&eps1) *= bigtens[i];
+                }
+            if (eps.d < eps1.d) {
+                eps.d = eps1.d;
+            }
+        }
+#endif
+        for(i = 0;;) {
+            L = dval(&u);
+            dval(&u) -= L;
+            *s++ = '0' + (int)L;
+            if (1. - dval(&u) < dval(&eps)) {
+                goto bump_up;
+            }
+            if (dval(&u) < dval(&eps)) {
+                goto ret1;
+            }
+            if (++i >= ilim) {
+                break;
+            }
+            dval(&eps) *= 10.;
+            dval(&u) *= 10.;
+        }
+    }
+    else {
+#endif
+        /* Generate ilim digits, then fix them up. */
+        dval(&eps) *= tens[ilim-1];
+        for(i = 1;; i++, dval(&u) *= 10.) {
+            L = (Long)(dval(&u));
+            if (!(dval(&u) -= L)) {
+                ilim = i;
+            }
+            *s++ = '0' + (int)L;
+            if (i == ilim) {
+                if (dval(&u) > 0.5 + dval(&eps)) {
+                    goto bump_up;
+                }
+                else if (dval(&u) < 0.5 - dval(&eps)) {
+                    while(*--s == '0');
+                    s++;
+                    goto ret1;
+                }
+                break;
+            }
+        }
+#ifndef No_leftright
+    }
+#endif
+fast_failed:
+    s = s0;
+    dval(&u) = dval(&d2);
+    k = k0;
+    ilim = ilim0;
+}
+
+/* Do we have a "small" integer? */
+
+if (be >= 0 && k <= Int_max) {
+    /* Yes. */
+    ds = tens[k];
+    if (ndigits < 0 && ilim <= 0) {
+        S = mhi = 0;
+        if (ilim < 0 || dval(&u) <= 5*ds) {
+            goto no_digits;
+        }
+        goto one_digit;
+    }
+    for(i = 1;; i++, dval(&u) *= 10.) {
+        L = (Long)(dval(&u) / ds);
+        dval(&u) -= L*ds;
+#ifdef Check_FLT_ROUNDS
+        /* If FLT_ROUNDS == 2, L will usually be high by 1 */
+        if (dval(&u) < 0) {
+            L--;
+            dval(&u) += ds;
+        }
+#endif
+        *s++ = '0' + (int)L;
+        if (!dval(&u)) {
+#ifdef SET_INEXACT
+            inexact = 0;
+#endif
+            break;
+        }
+        if (i == ilim) {
+#ifdef Honor_FLT_ROUNDS
+            if (mode > 1)
+                switch(Rounding) {
+                    case 0: goto ret1;
+                    case 2: goto bump_up;
+                }
+#endif
+            dval(&u) += dval(&u);
+#ifdef ROUND_BIASED
+            if (dval(&u) >= ds)
+#else
+            if (dval(&u) > ds || (dval(&u) == ds && L & 1))
+#endif
+            {
+bump_up:
+                while(*--s == '9')
+                    if (s == s0) {
+                        k++;
+                        *s = '0';
+                        break;
+                    }
+                ++*s++;
+            }
+            break;
+        }
+    }
+    goto ret1;
+}
+
+m2 = b2;
+m5 = b5;
+mhi = mlo = 0;
+if (leftright) {
+    i =
+#ifndef Sudden_Underflow
+        denorm ? be + (Bias + (P-1) - 1 + 1) :
+#endif
+#ifdef IBM
+        1 + 4*P - 3 - bbits + ((bbits + be - 1) & 3);
+#else
+        1 + P - bbits;
+#endif
+    b2 += i;
+    s2 += i;
+    mhi = i2b(1);
+}
+if (m2 > 0 && s2 > 0) {
+    i = m2 < s2 ? m2 : s2;
+    b2 -= i;
+    m2 -= i;
+    s2 -= i;
+}
+if (b5 > 0) {
+    if (leftright) {
+        if (m5 > 0) {
+            mhi = pow5mult(mhi, m5);
+            b1 = mult(mhi, b);
+            Bfree(b);
+            b = b1;
+        }
+        if ((j = b5 - m5)) {
+            b = pow5mult(b, j);
+        }
+    }
+    else {
+        b = pow5mult(b, b5);
+    }
+}
+S = i2b(1);
+if (s5 > 0) {
+    S = pow5mult(S, s5);
+}
+
+/* Check for special case that d is a normalized power of 2. */
+
+spec_case = 0;
+if ((mode < 2 || leftright)
+#ifdef Honor_FLT_ROUNDS
+    && Rounding == 1
+#endif
+   ) {
+    if (!word1(&u) && !(word0(&u) & Bndry_mask)
+#ifndef Sudden_Underflow
+        && word0(&u) & (Exp_mask & ~Exp_msk1)
+#endif
+       ) {
+        /* The special case */
+        b2 += Log2P;
+        s2 += Log2P;
+        spec_case = 1;
+    }
+}
+
+/* Arrange for convenient computation of quotients:
+ * shift left if necessary so divisor has 4 leading 0 bits.
+ *
+ * Perhaps we should just compute leading 28 bits of S once
+ * and for all and pass them and a shift to quorem, so it
+ * can do shifts and ors to compute the numerator for q.
+ */
+i = dshift(S, s2);
+b2 += i;
+m2 += i;
+s2 += i;
+if (b2 > 0) {
+    b = lshift(b, b2);
+}
+if (s2 > 0) {
+    S = lshift(S, s2);
+}
+if (k_check) {
+    if (cmp(b,S) < 0) {
+        k--;
+        b = multadd(b, 10, 0);  /* we botched the k estimate */
+        if (leftright) {
+            mhi = multadd(mhi, 10, 0);
+        }
+        ilim = ilim1;
+    }
+}
+if (ilim <= 0 && (mode == 3 || mode == 5)) {
+    if (ilim < 0 || cmp(b,S = multadd(S,5,0)) <= 0) {
+        /* no digits, fcvt style */
+no_digits:
+        k = -1 - ndigits;
+        goto ret;
+    }
+one_digit:
+    *s++ = '1';
+    k++;
+    goto ret;
+}
+if (leftright) {
+    if (m2 > 0) {
+        mhi = lshift(mhi, m2);
+    }
+
+    /* Compute mlo -- check for special case
+     * that d is a normalized power of 2.
+     */
+
+    mlo = mhi;
+    if (spec_case) {
+        mhi = Balloc(mhi->k);
+        Bcopy(mhi, mlo);
+        mhi = lshift(mhi, Log2P);
+    }
+
+    for(i = 1;; i++) {
+        dig = quorem(b,S) + '0';
+        /* Do we yet have the shortest decimal string
+         * that will round to d?
+         */
+        j = cmp(b, mlo);
+        delta = diff(S, mhi);
+        j1 = delta->sign ? 1 : cmp(b, delta);
+        Bfree(delta);
+#ifndef ROUND_BIASED
+        if (j1 == 0 && mode != 1 && !(word1(&u) & 1)
+#ifdef Honor_FLT_ROUNDS
+            && Rounding >= 1
+#endif
+           ) {
+            if (dig == '9') {
+                goto round_9_up;
+            }
+            if (j > 0) {
+                dig++;
+            }
+#ifdef SET_INEXACT
+            else if (!b->x[0] && b->wds <= 1) {
+                inexact = 0;
+            }
+#endif
+            *s++ = dig;
+            goto ret;
+        }
+#endif
+        if (j < 0 || (j == 0 && mode != 1
+#ifndef ROUND_BIASED
+                      && !(word1(&u) & 1)
+#endif
+                     )) {
+            if (!b->x[0] && b->wds <= 1) {
+#ifdef SET_INEXACT
+                inexact = 0;
+#endif
+                goto accept_dig;
+            }
+#ifdef Honor_FLT_ROUNDS
+            if (mode > 1)
+                switch(Rounding) {
+                    case 0: goto accept_dig;
+                    case 2: goto keep_dig;
+                }
+#endif /*Honor_FLT_ROUNDS*/
+            if (j1 > 0) {
+                b = lshift(b, 1);
+                j1 = cmp(b, S);
+#ifdef ROUND_BIASED
+                if (j1 >= 0 /*)*/
+#else
+                if ((j1 > 0 || (j1 == 0 && dig & 1))
+#endif
+                    && dig++ == '9')
+                    goto round_9_up;
+            }
+accept_dig:
+            *s++ = dig;
+            goto ret;
+        }
+        if (j1 > 0) {
+#ifdef Honor_FLT_ROUNDS
+            if (!Rounding) {
+                goto accept_dig;
+            }
+#endif
+            if (dig == '9') { /* possible if i == 1 */
+round_9_up:
+                *s++ = '9';
+                goto roundoff;
+            }
+            *s++ = dig + 1;
+            goto ret;
+        }
+#ifdef Honor_FLT_ROUNDS
+keep_dig:
+#endif
+        *s++ = dig;
+        if (i == ilim) {
+            break;
+        }
+        b = multadd(b, 10, 0);
+        if (mlo == mhi) {
+            mlo = mhi = multadd(mhi, 10, 0);
+        }
+        else {
+            mlo = multadd(mlo, 10, 0);
+            mhi = multadd(mhi, 10, 0);
+        }
+    }
+}
+else
+    for(i = 1;; i++) {
+        *s++ = dig = quorem(b,S) + '0';
+        if (!b->x[0] && b->wds <= 1) {
+#ifdef SET_INEXACT
+            inexact = 0;
+#endif
+            goto ret;
+        }
+        if (i >= ilim) {
+            break;
+        }
+        b = multadd(b, 10, 0);
+    }
+
+/* Round off last digit */
+
+#ifdef Honor_FLT_ROUNDS
+switch(Rounding) {
+case 0: goto trimzeros;
+case 2: goto roundoff;
+}
+#endif
+b = lshift(b, 1);
+j = cmp(b, S);
+#ifdef ROUND_BIASED
+if (j >= 0)
+#else
+if (j > 0 || (j == 0 && dig & 1))
+#endif
+{
+roundoff:
+    while(*--s == '9')
+        if (s == s0) {
+            k++;
+            *s++ = '1';
+            goto ret;
+        }
+    ++*s++;
+}
+else {
+#ifdef Honor_FLT_ROUNDS
+trimzeros:
+#endif
+    while(*--s == '0');
+    s++;
+}
+ret:
+Bfree(S);
+if (mhi) {
+    if (mlo && mlo != mhi) {
+        Bfree(mlo);
+    }
+    Bfree(mhi);
+}
+ret1:
+#ifdef SET_INEXACT
+if (inexact) {
+    if (!oldinexact) {
+        word0(&u) = Exp_1 + (70 << Exp_shift);
+        word1(&u) = 0;
+        dval(&u) += 1.;
+    }
+}
+else if (!oldinexact) {
+    clear_inexact();
+}
+#endif
+Bfree(b);
+*s = 0;
+*decpt = k + 1;
+if (rve) {
+    *rve = s;
+}
+return s0;
+}
+#ifdef __cplusplus
+}
+#endif
diff --git a/nsprpub/pr/src/misc/pralarm.c b/nsprpub/pr/src/misc/pralarm.c
new file mode 100644
index 0000000000..8130215c24
--- /dev/null
+++ b/nsprpub/pr/src/misc/pralarm.c
@@ -0,0 +1,263 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "primpl.h"
+
+/**********************************************************************/
+/******************************* PRALARM ******************************/
+/**********************************************************************/
+
+#include "obsolete/pralarm.h"
+
+struct PRAlarmID {                       /* typedef'd in pralarm.h       */
+    PRCList list;                        /* circular list linkage        */
+    PRAlarm *alarm;                      /* back pointer to owning alarm */
+    PRPeriodicAlarmFn function;          /* function to call for notify  */
+    void *clientData;                    /* opaque client context        */
+    PRIntervalTime period;               /* the client defined period    */
+    PRUint32 rate;                       /* rate of notification         */
+
+    PRUint32 accumulator;                /* keeps track of # notifies    */
+    PRIntervalTime epoch;                /* when timer was started       */
+    PRIntervalTime nextNotify;           /* when we'll next do our thing */
+    PRIntervalTime lastNotify;           /* when we last did our thing   */
+};
+
+typedef enum {alarm_active, alarm_inactive} _AlarmState;
+
+struct PRAlarm {                         /* typedef'd in pralarm.h       */
+    PRCList timers;                      /* base of alarm ids list       */
+    PRLock *lock;                        /* lock used to protect data    */
+    PRCondVar *cond;                     /* condition that used to wait  */
+    PRThread *notifier;                  /* thread to deliver notifies   */
+    PRAlarmID *current;                  /* current alarm being served   */
+    _AlarmState state;                   /* used to delete the alarm     */
+};
+
+static PRAlarmID *pr_getNextAlarm(PRAlarm *alarm, PRAlarmID *id)
+{
+    /*
+     * Puts 'id' back into the sorted list iff it's not NULL.
+     * Removes the first element from the list and returns it (or NULL).
+     * List is "assumed" to be short.
+     *
+     * NB: Caller is providing locking
+     */
+    PRCList *timer;
+    PRAlarmID *result = id;
+    PRIntervalTime now = PR_IntervalNow();
+
+    if (!PR_CLIST_IS_EMPTY(&alarm->timers))
+    {
+        if (id != NULL)  /* have to put this id back in */
+        {
+            PRIntervalTime idDelta = now - id->nextNotify;
+            timer = alarm->timers.next;
+            do
+            {
+                result = (PRAlarmID*)timer;
+                if ((PRIntervalTime)(now - result->nextNotify) > idDelta)
+                {
+                    PR_INSERT_BEFORE(&id->list, &alarm->timers);
+                    break;
+                }
+                timer = timer->next;
+            } while (timer != &alarm->timers);
+        }
+        result = (PRAlarmID*)(timer = PR_LIST_HEAD(&alarm->timers));
+        PR_REMOVE_LINK(timer);  /* remove it from the list */
+    }
+
+    return result;
+}  /* pr_getNextAlarm */
+
+static PRIntervalTime pr_PredictNextNotifyTime(PRAlarmID *id)
+{
+    PRIntervalTime delta;
+    PRFloat64 baseRate = (PRFloat64)id->period / (PRFloat64)id->rate;
+    PRFloat64 offsetFromEpoch = (PRFloat64)id->accumulator * baseRate;
+
+    id->accumulator += 1;  /* every call advances to next period */
+    id->lastNotify = id->nextNotify;  /* just keeping track of things */
+    id->nextNotify = (PRIntervalTime)(offsetFromEpoch + 0.5);
+
+    delta = id->nextNotify - id->lastNotify;
+    return delta;
+}  /* pr_PredictNextNotifyTime */
+
+static void PR_CALLBACK pr_alarmNotifier(void *arg)
+{
+    /*
+     * This is the root of the notifier thread. There is one such thread
+     * for each PRAlarm. It may service an arbitrary (though assumed to be
+     * small) number of alarms using the same thread and structure. It
+     * continues to run until the alarm is destroyed.
+     */
+    PRAlarmID *id = NULL;
+    PRAlarm *alarm = (PRAlarm*)arg;
+    enum {notify, abort, scan} why = scan;
+
+    while (why != abort)
+    {
+        PRIntervalTime pause;
+
+        PR_Lock(alarm->lock);
+        while (why == scan)
+        {
+            alarm->current = NULL;  /* reset current id */
+            if (alarm->state == alarm_inactive) {
+                why = abort;    /* we're toast */
+            }
+            else if (why == scan)  /* the dominant case */
+            {
+                id = pr_getNextAlarm(alarm, id);  /* even if it's the same */
+                if (id == NULL) { /* there are no alarms set */
+                    (void)PR_WaitCondVar(alarm->cond, PR_INTERVAL_NO_TIMEOUT);
+                }
+                else
+                {
+                    pause = id->nextNotify - (PR_IntervalNow() - id->epoch);
+                    if ((PRInt32)pause <= 0)  /* is this one's time up? */
+                    {
+                        why = notify;  /* set up to do our thing */
+                        alarm->current = id;  /* id we're about to schedule */
+                    }
+                    else {
+                        (void)PR_WaitCondVar(alarm->cond, pause);    /* dally */
+                    }
+                }
+            }
+        }
+        PR_Unlock(alarm->lock);
+
+        if (why == notify)
+        {
+            (void)pr_PredictNextNotifyTime(id);
+            if (!id->function(id, id->clientData, ~pause))
+            {
+                /*
+                 * Notified function decided not to continue. Free
+                 * the alarm id to make sure it doesn't get back on
+                 * the list.
+                 */
+                PR_DELETE(id);  /* free notifier object */
+                id = NULL;  /* so it doesn't get back into the list */
+            }
+            why = scan;  /* so we can cycle through the loop again */
+        }
+    }
+
+}  /* pr_alarm_notifier */
+
+PR_IMPLEMENT(PRAlarm*) PR_CreateAlarm(void)
+{
+    PRAlarm *alarm = PR_NEWZAP(PRAlarm);
+    if (alarm != NULL)
+    {
+        if ((alarm->lock = PR_NewLock()) == NULL) {
+            goto done;
+        }
+        if ((alarm->cond = PR_NewCondVar(alarm->lock)) == NULL) {
+            goto done;
+        }
+        alarm->state = alarm_active;
+        PR_INIT_CLIST(&alarm->timers);
+        alarm->notifier = PR_CreateThread(
+                              PR_USER_THREAD, pr_alarmNotifier, alarm,
+                              PR_GetThreadPriority(PR_GetCurrentThread()),
+                              PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0);
+        if (alarm->notifier == NULL) {
+            goto done;
+        }
+    }
+    return alarm;
+
+done:
+    if (alarm->cond != NULL) {
+        PR_DestroyCondVar(alarm->cond);
+    }
+    if (alarm->lock != NULL) {
+        PR_DestroyLock(alarm->lock);
+    }
+    PR_DELETE(alarm);
+    return NULL;
+}  /* CreateAlarm */
+
+PR_IMPLEMENT(PRStatus) PR_DestroyAlarm(PRAlarm *alarm)
+{
+    PRStatus rv;
+
+    PR_Lock(alarm->lock);
+    alarm->state = alarm_inactive;
+    rv = PR_NotifyCondVar(alarm->cond);
+    PR_Unlock(alarm->lock);
+
+    if (rv == PR_SUCCESS) {
+        rv = PR_JoinThread(alarm->notifier);
+    }
+    if (rv == PR_SUCCESS)
+    {
+        PR_DestroyCondVar(alarm->cond);
+        PR_DestroyLock(alarm->lock);
+        PR_DELETE(alarm);
+    }
+    return rv;
+}  /* PR_DestroyAlarm */
+
+PR_IMPLEMENT(PRAlarmID*) PR_SetAlarm(
+    PRAlarm *alarm, PRIntervalTime period, PRUint32 rate,
+    PRPeriodicAlarmFn function, void *clientData)
+{
+    /*
+     * Create a new periodic alarm an existing current structure.
+     * Set up the context and compute the first notify time (immediate).
+     * Link the new ID into the head of the list (since it's notifying
+     * immediately).
+     */
+
+    PRAlarmID *id = PR_NEWZAP(PRAlarmID);
+
+    if (!id) {
+        return NULL;
+    }
+
+    id->alarm = alarm;
+    PR_INIT_CLIST(&id->list);
+    id->function = function;
+    id->clientData = clientData;
+    id->period = period;
+    id->rate = rate;
+    id->epoch = id->nextNotify = PR_IntervalNow();
+    (void)pr_PredictNextNotifyTime(id);
+
+    PR_Lock(alarm->lock);
+    PR_INSERT_BEFORE(&id->list, &alarm->timers);
+    PR_NotifyCondVar(alarm->cond);
+    PR_Unlock(alarm->lock);
+
+    return id;
+}  /* PR_SetAlarm */
+
+PR_IMPLEMENT(PRStatus) PR_ResetAlarm(
+    PRAlarmID *id, PRIntervalTime period, PRUint32 rate)
+{
+    /*
+     * Can only be called from within the notify routine. Doesn't
+     * need locking because it can only be called from within the
+     * notify routine.
+     */
+    if (id != id->alarm->current) {
+        return PR_FAILURE;
+    }
+    id->period = period;
+    id->rate = rate;
+    id->accumulator = 1;
+    id->epoch = PR_IntervalNow();
+    (void)pr_PredictNextNotifyTime(id);
+    return PR_SUCCESS;
+}  /* PR_ResetAlarm */
+
+
+
diff --git a/nsprpub/pr/src/misc/pratom.c b/nsprpub/pr/src/misc/pratom.c
new file mode 100644
index 0000000000..4f0e3da303
--- /dev/null
+++ b/nsprpub/pr/src/misc/pratom.c
@@ -0,0 +1,384 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+**     PR Atomic operations
+*/
+
+
+#include "pratom.h"
+#include "primpl.h"
+
+#include <string.h>
+
+/*
+ * The following is a fallback implementation that emulates
+ * atomic operations for platforms without atomic operations.
+ * If a platform has atomic operations, it should define the
+ * macro _PR_HAVE_ATOMIC_OPS, and the following will not be
+ * compiled in.
+ */
+
+#if !defined(_PR_HAVE_ATOMIC_OPS)
+
+#if defined(_PR_PTHREADS)
+/*
+ * PR_AtomicDecrement() is used in NSPR's thread-specific data
+ * destructor.  Because thread-specific data destructors may be
+ * invoked after a PR_Cleanup() call, we need an implementation
+ * of the atomic routines that doesn't need NSPR to be initialized.
+ */
+
+/*
+ * We use a set of locks for all the emulated atomic operations.
+ * By hashing on the address of the integer to be locked the
+ * contention between multiple threads should be lessened.
+ *
+ * The number of atomic locks can be set by the environment variable
+ * NSPR_ATOMIC_HASH_LOCKS
+ */
+
+/*
+ * lock counts should be a power of 2
+ */
+#define DEFAULT_ATOMIC_LOCKS    16  /* should be in sync with the number of initializers
+                                        below */
+#define MAX_ATOMIC_LOCKS        (4 * 1024)
+
+static pthread_mutex_t static_atomic_locks[DEFAULT_ATOMIC_LOCKS] = {
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER
+};
+
+#ifdef DEBUG
+static PRInt32 static_hash_lock_counts[DEFAULT_ATOMIC_LOCKS];
+static PRInt32 *hash_lock_counts = static_hash_lock_counts;
+#endif
+
+static PRUint32 num_atomic_locks = DEFAULT_ATOMIC_LOCKS;
+static pthread_mutex_t *atomic_locks = static_atomic_locks;
+static PRUint32 atomic_hash_mask = DEFAULT_ATOMIC_LOCKS - 1;
+
+#define _PR_HASH_FOR_LOCK(ptr)                          \
+            ((PRUint32) (((PRUptrdiff) (ptr) >> 2)  ^   \
+                        ((PRUptrdiff) (ptr) >> 8)) &    \
+                        atomic_hash_mask)
+
+void _PR_MD_INIT_ATOMIC()
+{
+    char *eval;
+    int index;
+
+
+    PR_ASSERT(PR_FloorLog2(MAX_ATOMIC_LOCKS) ==
+              PR_CeilingLog2(MAX_ATOMIC_LOCKS));
+
+    PR_ASSERT(PR_FloorLog2(DEFAULT_ATOMIC_LOCKS) ==
+              PR_CeilingLog2(DEFAULT_ATOMIC_LOCKS));
+
+    if (((eval = getenv("NSPR_ATOMIC_HASH_LOCKS")) != NULL)  &&
+        ((num_atomic_locks = atoi(eval)) != DEFAULT_ATOMIC_LOCKS)) {
+
+        if (num_atomic_locks > MAX_ATOMIC_LOCKS) {
+            num_atomic_locks = MAX_ATOMIC_LOCKS;
+        }
+        else if (num_atomic_locks < 1) {
+            num_atomic_locks = 1;
+        }
+        else {
+            num_atomic_locks = PR_FloorLog2(num_atomic_locks);
+            num_atomic_locks = 1L << num_atomic_locks;
+        }
+        atomic_locks = (pthread_mutex_t *) PR_Malloc(sizeof(pthread_mutex_t) *
+                       num_atomic_locks);
+        if (atomic_locks) {
+            for (index = 0; index < num_atomic_locks; index++) {
+                if (pthread_mutex_init(&atomic_locks[index], NULL)) {
+                    PR_DELETE(atomic_locks);
+                    atomic_locks = NULL;
+                    break;
+                }
+            }
+        }
+#ifdef DEBUG
+        if (atomic_locks) {
+            hash_lock_counts = PR_CALLOC(num_atomic_locks * sizeof(PRInt32));
+            if (hash_lock_counts == NULL) {
+                PR_DELETE(atomic_locks);
+                atomic_locks = NULL;
+            }
+        }
+#endif
+        if (atomic_locks == NULL) {
+            /*
+             *  Use statically allocated locks
+             */
+            atomic_locks = static_atomic_locks;
+            num_atomic_locks = DEFAULT_ATOMIC_LOCKS;
+#ifdef DEBUG
+            hash_lock_counts = static_hash_lock_counts;
+#endif
+        }
+        atomic_hash_mask = num_atomic_locks - 1;
+    }
+    PR_ASSERT(PR_FloorLog2(num_atomic_locks) ==
+              PR_CeilingLog2(num_atomic_locks));
+}
+
+PRInt32
+_PR_MD_ATOMIC_INCREMENT(PRInt32 *val)
+{
+    PRInt32 rv;
+    PRInt32 idx = _PR_HASH_FOR_LOCK(val);
+
+    pthread_mutex_lock(&atomic_locks[idx]);
+    rv = ++(*val);
+#ifdef DEBUG
+    hash_lock_counts[idx]++;
+#endif
+    pthread_mutex_unlock(&atomic_locks[idx]);
+    return rv;
+}
+
+PRInt32
+_PR_MD_ATOMIC_ADD(PRInt32 *ptr, PRInt32 val)
+{
+    PRInt32 rv;
+    PRInt32 idx = _PR_HASH_FOR_LOCK(ptr);
+
+    pthread_mutex_lock(&atomic_locks[idx]);
+    rv = ((*ptr) += val);
+#ifdef DEBUG
+    hash_lock_counts[idx]++;
+#endif
+    pthread_mutex_unlock(&atomic_locks[idx]);
+    return rv;
+}
+
+PRInt32
+_PR_MD_ATOMIC_DECREMENT(PRInt32 *val)
+{
+    PRInt32 rv;
+    PRInt32 idx = _PR_HASH_FOR_LOCK(val);
+
+    pthread_mutex_lock(&atomic_locks[idx]);
+    rv = --(*val);
+#ifdef DEBUG
+    hash_lock_counts[idx]++;
+#endif
+    pthread_mutex_unlock(&atomic_locks[idx]);
+    return rv;
+}
+
+PRInt32
+_PR_MD_ATOMIC_SET(PRInt32 *val, PRInt32 newval)
+{
+    PRInt32 rv;
+    PRInt32 idx = _PR_HASH_FOR_LOCK(val);
+
+    pthread_mutex_lock(&atomic_locks[idx]);
+    rv = *val;
+    *val = newval;
+#ifdef DEBUG
+    hash_lock_counts[idx]++;
+#endif
+    pthread_mutex_unlock(&atomic_locks[idx]);
+    return rv;
+}
+#else  /* _PR_PTHREADS */
+/*
+ * We use a single lock for all the emulated atomic operations.
+ * The lock contention should be acceptable.
+ */
+static PRLock *atomic_lock = NULL;
+void _PR_MD_INIT_ATOMIC(void)
+{
+    if (atomic_lock == NULL) {
+        atomic_lock = PR_NewLock();
+    }
+}
+
+PRInt32
+_PR_MD_ATOMIC_INCREMENT(PRInt32 *val)
+{
+    PRInt32 rv;
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+    PR_Lock(atomic_lock);
+    rv = ++(*val);
+    PR_Unlock(atomic_lock);
+    return rv;
+}
+
+PRInt32
+_PR_MD_ATOMIC_ADD(PRInt32 *ptr, PRInt32 val)
+{
+    PRInt32 rv;
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+    PR_Lock(atomic_lock);
+    rv = ((*ptr) += val);
+    PR_Unlock(atomic_lock);
+    return rv;
+}
+
+PRInt32
+_PR_MD_ATOMIC_DECREMENT(PRInt32 *val)
+{
+    PRInt32 rv;
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+    PR_Lock(atomic_lock);
+    rv = --(*val);
+    PR_Unlock(atomic_lock);
+    return rv;
+}
+
+PRInt32
+_PR_MD_ATOMIC_SET(PRInt32 *val, PRInt32 newval)
+{
+    PRInt32 rv;
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+    PR_Lock(atomic_lock);
+    rv = *val;
+    *val = newval;
+    PR_Unlock(atomic_lock);
+    return rv;
+}
+#endif  /* _PR_PTHREADS */
+
+#endif  /* !_PR_HAVE_ATOMIC_OPS */
+
+void _PR_InitAtomic(void)
+{
+    _PR_MD_INIT_ATOMIC();
+}
+
+PR_IMPLEMENT(PRInt32)
+PR_AtomicIncrement(PRInt32 *val)
+{
+    return _PR_MD_ATOMIC_INCREMENT(val);
+}
+
+PR_IMPLEMENT(PRInt32)
+PR_AtomicDecrement(PRInt32 *val)
+{
+    return _PR_MD_ATOMIC_DECREMENT(val);
+}
+
+PR_IMPLEMENT(PRInt32)
+PR_AtomicSet(PRInt32 *val, PRInt32 newval)
+{
+    return _PR_MD_ATOMIC_SET(val, newval);
+}
+
+PR_IMPLEMENT(PRInt32)
+PR_AtomicAdd(PRInt32 *ptr, PRInt32 val)
+{
+    return _PR_MD_ATOMIC_ADD(ptr, val);
+}
+/*
+ * For platforms, which don't support the CAS (compare-and-swap) instruction
+ * (or an equivalent), the stack operations are implemented by use of PRLock
+ */
+
+PR_IMPLEMENT(PRStack *)
+PR_CreateStack(const char *stack_name)
+{
+    PRStack *stack;
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    if ((stack = PR_NEW(PRStack)) == NULL) {
+        return NULL;
+    }
+    if (stack_name) {
+        stack->prstk_name = (char *) PR_Malloc(strlen(stack_name) + 1);
+        if (stack->prstk_name == NULL) {
+            PR_DELETE(stack);
+            return NULL;
+        }
+        strcpy(stack->prstk_name, stack_name);
+    } else {
+        stack->prstk_name = NULL;
+    }
+
+#ifndef _PR_HAVE_ATOMIC_CAS
+    stack->prstk_lock = PR_NewLock();
+    if (stack->prstk_lock == NULL) {
+        PR_Free(stack->prstk_name);
+        PR_DELETE(stack);
+        return NULL;
+    }
+#endif /* !_PR_HAVE_ATOMIC_CAS */
+
+    stack->prstk_head.prstk_elem_next = NULL;
+
+    return stack;
+}
+
+PR_IMPLEMENT(PRStatus)
+PR_DestroyStack(PRStack *stack)
+{
+    if (stack->prstk_head.prstk_elem_next != NULL) {
+        PR_SetError(PR_INVALID_STATE_ERROR, 0);
+        return PR_FAILURE;
+    }
+
+    if (stack->prstk_name) {
+        PR_Free(stack->prstk_name);
+    }
+#ifndef _PR_HAVE_ATOMIC_CAS
+    PR_DestroyLock(stack->prstk_lock);
+#endif /* !_PR_HAVE_ATOMIC_CAS */
+    PR_DELETE(stack);
+
+    return PR_SUCCESS;
+}
+
+#ifndef _PR_HAVE_ATOMIC_CAS
+
+PR_IMPLEMENT(void)
+PR_StackPush(PRStack *stack, PRStackElem *stack_elem)
+{
+    PR_Lock(stack->prstk_lock);
+    stack_elem->prstk_elem_next = stack->prstk_head.prstk_elem_next;
+    stack->prstk_head.prstk_elem_next = stack_elem;
+    PR_Unlock(stack->prstk_lock);
+    return;
+}
+
+PR_IMPLEMENT(PRStackElem *)
+PR_StackPop(PRStack *stack)
+{
+    PRStackElem *element;
+
+    PR_Lock(stack->prstk_lock);
+    element = stack->prstk_head.prstk_elem_next;
+    if (element != NULL) {
+        stack->prstk_head.prstk_elem_next = element->prstk_elem_next;
+        element->prstk_elem_next = NULL;    /* debugging aid */
+    }
+    PR_Unlock(stack->prstk_lock);
+    return element;
+}
+#endif /* !_PR_HAVE_ATOMIC_CAS */
diff --git a/nsprpub/pr/src/misc/praton.c b/nsprpub/pr/src/misc/praton.c
new file mode 100644
index 0000000000..3e729f5879
--- /dev/null
+++ b/nsprpub/pr/src/misc/praton.c
@@ -0,0 +1,217 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*******************************************************************************
+ * The following function pr_inet_aton is based on the BSD function inet_aton
+ * with some modifications. The license and copyright notices applying to this
+ * function appear below. Modifications are also according to the license below.
+ ******************************************************************************/
+
+#include "prnetdb.h"
+
+/*
+ * Copyright (c) 1983, 1990, 1993
+ *    The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+/*
+ * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
+ * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+ * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#define XX 127
+static const unsigned char index_hex[256] = {
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    0, 1, 2, 3,  4, 5, 6, 7,  8, 9,XX,XX, XX,XX,XX,XX,
+    XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+};
+
+static PRBool _isdigit(char c) {
+    return c >= '0' && c <= '9';
+}
+static PRBool _isxdigit(char c) {
+    return index_hex[(unsigned char) c] != XX;
+}
+static PRBool _isspace(char c) {
+    return c == ' ' || (c >= '\t' && c <= '\r');
+}
+#undef XX
+
+int
+pr_inet_aton(const char *cp, PRUint32 *addr)
+{
+    PRUint32 val;
+    int base, n;
+    char c;
+    PRUint8 parts[4];
+    PRUint8 *pp = parts;
+    int digit;
+
+    c = *cp;
+    for (;;) {
+        /*
+         * Collect number up to ``.''.
+         * Values are specified as for C:
+         * 0x=hex, 0=octal, isdigit=decimal.
+         */
+        if (!_isdigit(c)) {
+            return (0);
+        }
+        val = 0; base = 10; digit = 0;
+        if (c == '0') {
+            c = *++cp;
+            if (c == 'x' || c == 'X') {
+                base = 16, c = *++cp;
+            }
+            else {
+                base = 8;
+                digit = 1;
+            }
+        }
+        for (;;) {
+            if (_isdigit(c)) {
+                if (base == 8 && (c == '8' || c == '9')) {
+                    return (0);
+                }
+                val = (val * base) + (c - '0');
+                c = *++cp;
+                digit = 1;
+            } else if (base == 16 && _isxdigit(c)) {
+                val = (val << 4) + index_hex[(unsigned char) c];
+                c = *++cp;
+                digit = 1;
+            } else {
+                break;
+            }
+        }
+        if (c == '.') {
+            /*
+             * Internet format:
+             *    a.b.c.d
+             *    a.b.c    (with c treated as 16 bits)
+             *    a.b    (with b treated as 24 bits)
+             */
+            if (pp >= parts + 3 || val > 0xffU) {
+                return (0);
+            }
+            *pp++ = val;
+            c = *++cp;
+        } else {
+            break;
+        }
+    }
+    /*
+     * Check for trailing characters.
+     */
+    if (c != '\0' && !_isspace(c)) {
+        return (0);
+    }
+    /*
+     * Did we get a valid digit?
+     */
+    if (!digit) {
+        return (0);
+    }
+    /*
+     * Concoct the address according to
+     * the number of parts specified.
+     */
+    n = pp - parts + 1;
+    switch (n) {
+        case 1:                /*%< a -- 32 bits */
+            break;
+
+        case 2:                /*%< a.b -- 8.24 bits */
+            if (val > 0xffffffU) {
+                return (0);
+            }
+            val |= (unsigned int)parts[0] << 24;
+            break;
+
+        case 3:                /*%< a.b.c -- 8.8.16 bits */
+            if (val > 0xffffU) {
+                return (0);
+            }
+            val |= ((unsigned int)parts[0] << 24) | ((unsigned int)parts[1] << 16);
+            break;
+
+        case 4:                /*%< a.b.c.d -- 8.8.8.8 bits */
+            if (val > 0xffU) {
+                return (0);
+            }
+            val |= ((unsigned int)parts[0] << 24) |
+                   ((unsigned int)parts[1] << 16) |
+                   ((unsigned int)parts[2] << 8);
+            break;
+    }
+    *addr = PR_htonl(val);
+    return (1);
+}
+
diff --git a/nsprpub/pr/src/misc/prcountr.c b/nsprpub/pr/src/misc/prcountr.c
new file mode 100644
index 0000000000..29d7d4ccbe
--- /dev/null
+++ b/nsprpub/pr/src/misc/prcountr.c
@@ -0,0 +1,483 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+** prcountr.c -- NSPR Instrumentation Counters
+**
+** Implement the interface defined in prcountr.h
+**
+** Design Notes:
+**
+** The Counter Facility (CF) has a single anchor: qNameList.
+** The anchor is a PRCList. qNameList is a list of links in QName
+** structures. From qNameList any QName structure and its
+** associated RName structure can be located.
+**
+** For each QName, a list of RName structures is anchored at
+** rnLink in the QName structure.
+**
+** The counter itself is embedded in the RName structure.
+**
+** For manipulating the counter database, single lock is used to
+** protect the entire list: counterLock.
+**
+** A PRCounterHandle, defined in prcountr.h, is really a pointer
+** to a RName structure. References by PRCounterHandle are
+** dead-reconed to the RName structure. The PRCounterHandle is
+** "overloaded" for traversing the QName structures; only the
+** function PR_FindNextQnameHandle() uses this overloading.
+**
+**
+** ToDo (lth): decide on how to lock or atomically update
+** individual counters. Candidates are: the global lock; a lock
+** per RName structure; Atomic operations (Note that there are
+** not adaquate atomic operations (yet) to achieve this goal). At
+** this writing (6/19/98) , the update of the counter variable in
+** a QName structure is unprotected.
+**
+*/
+
+#include "prcountr.h"
+#include "prclist.h"
+#include "prlock.h"
+#include "prlog.h"
+#include "prmem.h"
+#include <string.h>
+
+/*
+**
+*/
+typedef struct QName
+{
+    PRCList link;
+    PRCList rNameList;
+    char    name[PRCOUNTER_NAME_MAX+1];
+} QName;
+
+/*
+**
+*/
+typedef struct RName
+{
+    PRCList link;
+    QName   *qName;
+    PRLock  *lock;
+    volatile PRUint32   counter;
+    char    name[PRCOUNTER_NAME_MAX+1];
+    char    desc[PRCOUNTER_DESC_MAX+1];
+} RName;
+
+
+/*
+** Define the Counter Facility database
+*/
+static PRLock  *counterLock;
+static PRCList qNameList;
+static PRLogModuleInfo *lm;
+
+/*
+** _PR_CounterInitialize() -- Initialize the Counter Facility
+**
+*/
+static void _PR_CounterInitialize( void )
+{
+    /*
+    ** This function should be called only once
+    */
+    PR_ASSERT( counterLock == NULL );
+
+    counterLock = PR_NewLock();
+    PR_INIT_CLIST( &qNameList );
+    lm = PR_NewLogModule("counters");
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: Initialization complete"));
+
+    return;
+} /* end _PR_CounterInitialize() */
+
+/*
+** PR_CreateCounter() -- Create a counter
+**
+**  ValidateArguments
+**  Lock
+**  if (qName not already in database)
+**      NewQname
+**  if (rName already in database )
+**      Assert
+**  else NewRname
+**  NewCounter
+**  link 'em up
+**  Unlock
+**
+*/
+PR_IMPLEMENT(PRCounterHandle)
+PR_CreateCounter(
+    const char *qName,
+    const char *rName,
+    const char *description
+)
+{
+    QName   *qnp;
+    RName   *rnp;
+    PRBool  matchQname = PR_FALSE;
+
+    /* Self initialize, if necessary */
+    if ( counterLock == NULL ) {
+        _PR_CounterInitialize();
+    }
+
+    /* Validate input arguments */
+    PR_ASSERT( strlen(qName) <= PRCOUNTER_NAME_MAX );
+    PR_ASSERT( strlen(rName) <= PRCOUNTER_NAME_MAX );
+    PR_ASSERT( strlen(description) <= PRCOUNTER_DESC_MAX );
+
+    /* Lock the Facility */
+    PR_Lock( counterLock );
+
+    /* Do we already have a matching QName? */
+    if (!PR_CLIST_IS_EMPTY( &qNameList ))
+    {
+        qnp = (QName *) PR_LIST_HEAD( &qNameList );
+        do {
+            if ( strcmp(qnp->name, qName) == 0)
+            {
+                matchQname = PR_TRUE;
+                break;
+            }
+            qnp = (QName *)PR_NEXT_LINK( &qnp->link );
+        } while( qnp != (QName *)&qNameList );
+    }
+    /*
+    ** If we did not find a matching QName,
+    **    allocate one and initialize it.
+    **    link it onto the qNameList.
+    **
+    */
+    if ( matchQname != PR_TRUE )
+    {
+        qnp = PR_NEWZAP( QName );
+        PR_ASSERT( qnp != NULL );
+        PR_INIT_CLIST( &qnp->link );
+        PR_INIT_CLIST( &qnp->rNameList );
+        strcpy( qnp->name, qName );
+        PR_APPEND_LINK( &qnp->link, &qNameList );
+    }
+
+    /* Do we already have a matching RName? */
+    if (!PR_CLIST_IS_EMPTY( &qnp->rNameList ))
+    {
+        rnp = (RName *) PR_LIST_HEAD( &qnp->rNameList );
+        do {
+            /*
+            ** No duplicate RNames are allowed within a QName
+            **
+            */
+            PR_ASSERT( strcmp(rnp->name, rName));
+            rnp = (RName *)PR_NEXT_LINK( &rnp->link );
+        } while( rnp != (RName *)&qnp->rNameList );
+    }
+
+    /* Get a new RName structure; initialize its members */
+    rnp = PR_NEWZAP( RName );
+    PR_ASSERT( rnp != NULL );
+    PR_INIT_CLIST( &rnp->link );
+    strcpy( rnp->name, rName );
+    strcpy( rnp->desc, description );
+    rnp->lock = PR_NewLock();
+    if ( rnp->lock == NULL )
+    {
+        PR_ASSERT(0);
+    }
+
+    PR_APPEND_LINK( &rnp->link, &qnp->rNameList ); /* add RName to QName's rnList */
+    rnp->qName = qnp;                       /* point the RName to the QName */
+
+    /* Unlock the Facility */
+    PR_Unlock( counterLock );
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: Create: QName: %s %p, RName: %s %p\n\t",
+                               qName, qnp, rName, rnp ));
+
+    return((PRCounterHandle)rnp);
+} /*  end PR_CreateCounter() */
+
+
+/*
+**
+*/
+PR_IMPLEMENT(void)
+PR_DestroyCounter(
+    PRCounterHandle handle
+)
+{
+    RName   *rnp = (RName *)handle;
+    QName   *qnp = rnp->qName;
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: Deleting: QName: %s, RName: %s",
+                               qnp->name, rnp->name));
+
+    /* Lock the Facility */
+    PR_Lock( counterLock );
+
+    /*
+    ** Remove RName from the list of RNames in QName
+    ** and free RName
+    */
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: Deleting RName: %s, %p",
+                               rnp->name, rnp));
+    PR_REMOVE_LINK( &rnp->link );
+    PR_Free( rnp->lock );
+    PR_DELETE( rnp );
+
+    /*
+    ** If this is the last RName within QName
+    **   remove QName from the qNameList and free it
+    */
+    if ( PR_CLIST_IS_EMPTY( &qnp->rNameList ) )
+    {
+        PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: Deleting unused QName: %s, %p",
+                                   qnp->name, qnp));
+        PR_REMOVE_LINK( &qnp->link );
+        PR_DELETE( qnp );
+    }
+
+    /* Unlock the Facility */
+    PR_Unlock( counterLock );
+    return;
+} /*  end PR_DestroyCounter() */
+
+/*
+**
+*/
+PR_IMPLEMENT(PRCounterHandle)
+PR_GetCounterHandleFromName(
+    const char *qName,
+    const char *rName
+)
+{
+    const char    *qn, *rn, *desc;
+    PRCounterHandle     qh, rh = NULL;
+    RName   *rnp = NULL;
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: GetCounterHandleFromName:\n\t"
+                               "QName: %s, RName: %s", qName, rName ));
+
+    qh = PR_FindNextCounterQname( NULL );
+    while (qh != NULL)
+    {
+        rh = PR_FindNextCounterRname( NULL, qh );
+        while ( rh != NULL )
+        {
+            PR_GetCounterNameFromHandle( rh, &qn, &rn, &desc );
+            if ( (strcmp( qName, qn ) == 0)
+                 && (strcmp( rName, rn ) == 0 ))
+            {
+                rnp = (RName *)rh;
+                goto foundIt;
+            }
+            rh = PR_FindNextCounterRname( rh, qh );
+        }
+        qh = PR_FindNextCounterQname( NULL );
+    }
+
+foundIt:
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: GetConterHandleFromName: %p", rnp ));
+    return(rh);
+} /*  end PR_GetCounterHandleFromName() */
+
+/*
+**
+*/
+PR_IMPLEMENT(void)
+PR_GetCounterNameFromHandle(
+    PRCounterHandle handle,
+    const char **qName,
+    const char **rName,
+    const char **description
+)
+{
+    RName   *rnp = (RName *)handle;
+    QName   *qnp = rnp->qName;
+
+    *qName = qnp->name;
+    *rName = rnp->name;
+    *description = rnp->desc;
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: GetConterNameFromHandle: "
+                               "QNp: %p, RNp: %p,\n\tQName: %s, RName: %s, Desc: %s",
+                               qnp, rnp, qnp->name, rnp->name, rnp->desc ));
+
+    return;
+} /*  end PR_GetCounterNameFromHandle() */
+
+
+/*
+**
+*/
+PR_IMPLEMENT(void)
+PR_IncrementCounter(
+    PRCounterHandle handle
+)
+{
+    PR_Lock(((RName *)handle)->lock);
+    ((RName *)handle)->counter++;
+    PR_Unlock(((RName *)handle)->lock);
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: Increment: %p, %ld",
+                               handle, ((RName *)handle)->counter ));
+
+    return;
+} /*  end PR_IncrementCounter() */
+
+
+
+/*
+**
+*/
+PR_IMPLEMENT(void)
+PR_DecrementCounter(
+    PRCounterHandle handle
+)
+{
+    PR_Lock(((RName *)handle)->lock);
+    ((RName *)handle)->counter--;
+    PR_Unlock(((RName *)handle)->lock);
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: Decrement: %p, %ld",
+                               handle, ((RName *)handle)->counter ));
+
+    return;
+} /*  end PR_DecrementCounter()  */
+
+
+/*
+**
+*/
+PR_IMPLEMENT(void)
+PR_AddToCounter(
+    PRCounterHandle handle,
+    PRUint32 value
+)
+{
+    PR_Lock(((RName *)handle)->lock);
+    ((RName *)handle)->counter += value;
+    PR_Unlock(((RName *)handle)->lock);
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: AddToCounter: %p, %ld",
+                               handle, ((RName *)handle)->counter ));
+
+    return;
+} /*  end PR_AddToCounter() */
+
+
+/*
+**
+*/
+PR_IMPLEMENT(void)
+PR_SubtractFromCounter(
+    PRCounterHandle handle,
+    PRUint32 value
+)
+{
+    PR_Lock(((RName *)handle)->lock);
+    ((RName *)handle)->counter -= value;
+    PR_Unlock(((RName *)handle)->lock);
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: SubtractFromCounter: %p, %ld",
+                               handle, ((RName *)handle)->counter ));
+
+    return;
+} /*  end  PR_SubtractFromCounter() */
+
+/*
+**
+*/
+PR_IMPLEMENT(PRUint32)
+PR_GetCounter(
+    PRCounterHandle handle
+)
+{
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: GetCounter: %p, %ld",
+                               handle, ((RName *)handle)->counter ));
+
+    return(((RName *)handle)->counter);
+} /*  end  PR_GetCounter() */
+
+/*
+**
+*/
+PR_IMPLEMENT(void)
+PR_SetCounter(
+    PRCounterHandle handle,
+    PRUint32 value
+)
+{
+    ((RName *)handle)->counter = value;
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: SetCounter: %p, %ld",
+                               handle, ((RName *)handle)->counter ));
+
+    return;
+} /*  end  PR_SetCounter() */
+
+/*
+**
+*/
+PR_IMPLEMENT(PRCounterHandle)
+PR_FindNextCounterQname(
+    PRCounterHandle handle
+)
+{
+    QName *qnp = (QName *)handle;
+
+    if ( PR_CLIST_IS_EMPTY( &qNameList )) {
+        qnp = NULL;
+    }
+    else if ( qnp == NULL ) {
+        qnp = (QName *)PR_LIST_HEAD( &qNameList );
+    }
+    else if ( PR_NEXT_LINK( &qnp->link ) ==  &qNameList ) {
+        qnp = NULL;
+    }
+    else {
+        qnp = (QName *)PR_NEXT_LINK( &qnp->link );
+    }
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: FindNextQname: Handle: %p, Returns: %p",
+                               handle, qnp ));
+
+    return((PRCounterHandle)qnp);
+} /*  end  PR_FindNextCounterQname() */
+
+
+/*
+**
+*/
+PR_IMPLEMENT(PRCounterHandle)
+PR_FindNextCounterRname(
+    PRCounterHandle rhandle,
+    PRCounterHandle qhandle
+)
+{
+    RName *rnp = (RName *)rhandle;
+    QName *qnp = (QName *)qhandle;
+
+
+    if ( PR_CLIST_IS_EMPTY( &qnp->rNameList )) {
+        rnp = NULL;
+    }
+    else if ( rnp == NULL ) {
+        rnp = (RName *)PR_LIST_HEAD( &qnp->rNameList );
+    }
+    else if ( PR_NEXT_LINK( &rnp->link ) ==  &qnp->rNameList ) {
+        rnp = NULL;
+    }
+    else {
+        rnp = (RName *)PR_NEXT_LINK( &rnp->link );
+    }
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: FindNextRname: Rhandle: %p, QHandle: %p, Returns: %p",
+                               rhandle, qhandle, rnp ));
+
+    return((PRCounterHandle)rnp);
+} /*  end PR_FindNextCounterRname() */
diff --git a/nsprpub/pr/src/misc/prdtoa.c b/nsprpub/pr/src/misc/prdtoa.c
new file mode 100644
index 0000000000..51b331bac8
--- /dev/null
+++ b/nsprpub/pr/src/misc/prdtoa.c
@@ -0,0 +1,3697 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * This file is based on the third-party code dtoa.c.  We minimize our
+ * modifications to third-party code to make it easy to merge new versions.
+ * The author of dtoa.c was not willing to add the parentheses suggested by
+ * GCC, so we suppress these warnings.
+ */
+#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 2)
+#pragma GCC diagnostic ignored "-Wparentheses"
+#endif
+
+#include "primpl.h"
+#include "prbit.h"
+
+#define MULTIPLE_THREADS
+#define ACQUIRE_DTOA_LOCK(n)    PR_Lock(dtoa_lock[n])
+#define FREE_DTOA_LOCK(n)   PR_Unlock(dtoa_lock[n])
+
+static PRLock *dtoa_lock[2];
+
+void _PR_InitDtoa(void)
+{
+    dtoa_lock[0] = PR_NewLock();
+    dtoa_lock[1] = PR_NewLock();
+}
+
+void _PR_CleanupDtoa(void)
+{
+    PR_DestroyLock(dtoa_lock[0]);
+    dtoa_lock[0] = NULL;
+    PR_DestroyLock(dtoa_lock[1]);
+    dtoa_lock[1] = NULL;
+
+    /* FIXME: deal with freelist and p5s. */
+}
+
+#if !defined(__ARM_EABI__) \
+    && (defined(__arm) || defined(__arm__) || defined(__arm26__) \
+    || defined(__arm32__))
+#define IEEE_ARM
+#elif defined(IS_LITTLE_ENDIAN)
+#define IEEE_8087
+#else
+#define IEEE_MC68k
+#endif
+
+#define Long PRInt32
+#define ULong PRUint32
+#define NO_LONG_LONG
+
+#define No_Hex_NaN
+
+/****************************************************************
+ *
+ * The author of this software is David M. Gay.
+ *
+ * Copyright (c) 1991, 2000, 2001 by Lucent Technologies.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose without fee is hereby granted, provided that this entire notice
+ * is included in all copies of any software which is or includes a copy
+ * or modification of this software and in all copies of the supporting
+ * documentation for such software.
+ *
+ * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHOR NOR LUCENT MAKES ANY
+ * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
+ * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
+ *
+ ***************************************************************/
+
+/* Please send bug reports to David M. Gay (dmg at acm dot org,
+ * with " at " changed at "@" and " dot " changed to ".").  */
+
+/* On a machine with IEEE extended-precision registers, it is
+ * necessary to specify double-precision (53-bit) rounding precision
+ * before invoking strtod or dtoa.  If the machine uses (the equivalent
+ * of) Intel 80x87 arithmetic, the call
+ *  _control87(PC_53, MCW_PC);
+ * does this with many compilers.  Whether this or another call is
+ * appropriate depends on the compiler; for this to work, it may be
+ * necessary to #include "float.h" or another system-dependent header
+ * file.
+ */
+
+/* strtod for IEEE-, VAX-, and IBM-arithmetic machines.
+ *
+ * This strtod returns a nearest machine number to the input decimal
+ * string (or sets errno to ERANGE).  With IEEE arithmetic, ties are
+ * broken by the IEEE round-even rule.  Otherwise ties are broken by
+ * biased rounding (add half and chop).
+ *
+ * Inspired loosely by William D. Clinger's paper "How to Read Floating
+ * Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 92-101].
+ *
+ * Modifications:
+ *
+ *  1. We only require IEEE, IBM, or VAX double-precision
+ *      arithmetic (not IEEE double-extended).
+ *  2. We get by with floating-point arithmetic in a case that
+ *      Clinger missed -- when we're computing d * 10^n
+ *      for a small integer d and the integer n is not too
+ *      much larger than 22 (the maximum integer k for which
+ *      we can represent 10^k exactly), we may be able to
+ *      compute (d*10^k) * 10^(e-k) with just one roundoff.
+ *  3. Rather than a bit-at-a-time adjustment of the binary
+ *      result in the hard case, we use floating-point
+ *      arithmetic to determine the adjustment to within
+ *      one bit; only in really hard cases do we need to
+ *      compute a second residual.
+ *  4. Because of 3., we don't need a large table of powers of 10
+ *      for ten-to-e (just some small tables, e.g. of 10^k
+ *      for 0 <= k <= 22).
+ */
+
+/*
+ * #define IEEE_8087 for IEEE-arithmetic machines where the least
+ *  significant byte has the lowest address.
+ * #define IEEE_MC68k for IEEE-arithmetic machines where the most
+ *  significant byte has the lowest address.
+ * #define IEEE_ARM for IEEE-arithmetic machines where the two words
+ *  in a double are stored in big endian order but the two shorts
+ *  in a word are still stored in little endian order.
+ * #define Long int on machines with 32-bit ints and 64-bit longs.
+ * #define IBM for IBM mainframe-style floating-point arithmetic.
+ * #define VAX for VAX-style floating-point arithmetic (D_floating).
+ * #define No_leftright to omit left-right logic in fast floating-point
+ *  computation of dtoa.
+ * #define Honor_FLT_ROUNDS if FLT_ROUNDS can assume the values 2 or 3
+ *  and strtod and dtoa should round accordingly.
+ * #define Check_FLT_ROUNDS if FLT_ROUNDS can assume the values 2 or 3
+ *  and Honor_FLT_ROUNDS is not #defined.
+ * #define RND_PRODQUOT to use rnd_prod and rnd_quot (assembly routines
+ *  that use extended-precision instructions to compute rounded
+ *  products and quotients) with IBM.
+ * #define ROUND_BIASED for IEEE-format with biased rounding.
+ * #define Inaccurate_Divide for IEEE-format with correctly rounded
+ *  products but inaccurate quotients, e.g., for Intel i860.
+ * #define NO_LONG_LONG on machines that do not have a "long long"
+ *  integer type (of >= 64 bits).  On such machines, you can
+ *  #define Just_16 to store 16 bits per 32-bit Long when doing
+ *  high-precision integer arithmetic.  Whether this speeds things
+ *  up or slows things down depends on the machine and the number
+ *  being converted.  If long long is available and the name is
+ *  something other than "long long", #define Llong to be the name,
+ *  and if "unsigned Llong" does not work as an unsigned version of
+ *  Llong, #define #ULLong to be the corresponding unsigned type.
+ * #define KR_headers for old-style C function headers.
+ * #define Bad_float_h if your system lacks a float.h or if it does not
+ *  define some or all of DBL_DIG, DBL_MAX_10_EXP, DBL_MAX_EXP,
+ *  FLT_RADIX, FLT_ROUNDS, and DBL_MAX.
+ * #define MALLOC your_malloc, where your_malloc(n) acts like malloc(n)
+ *  if memory is available and otherwise does something you deem
+ *  appropriate.  If MALLOC is undefined, malloc will be invoked
+ *  directly -- and assumed always to succeed.  Similarly, if you
+ *  want something other than the system's free() to be called to
+ *  recycle memory acquired from MALLOC, #define FREE to be the
+ *  name of the alternate routine.  (FREE or free is only called in
+ *  pathological cases, e.g., in a dtoa call after a dtoa return in
+ *  mode 3 with thousands of digits requested.)
+ * #define Omit_Private_Memory to omit logic (added Jan. 1998) for making
+ *  memory allocations from a private pool of memory when possible.
+ *  When used, the private pool is PRIVATE_MEM bytes long:  2304 bytes,
+ *  unless #defined to be a different length.  This default length
+ *  suffices to get rid of MALLOC calls except for unusual cases,
+ *  such as decimal-to-binary conversion of a very long string of
+ *  digits.  The longest string dtoa can return is about 751 bytes
+ *  long.  For conversions by strtod of strings of 800 digits and
+ *  all dtoa conversions in single-threaded executions with 8-byte
+ *  pointers, PRIVATE_MEM >= 7400 appears to suffice; with 4-byte
+ *  pointers, PRIVATE_MEM >= 7112 appears adequate.
+ * #define INFNAN_CHECK on IEEE systems to cause strtod to check for
+ *  Infinity and NaN (case insensitively).  On some systems (e.g.,
+ *  some HP systems), it may be necessary to #define NAN_WORD0
+ *  appropriately -- to the most significant word of a quiet NaN.
+ *  (On HP Series 700/800 machines, -DNAN_WORD0=0x7ff40000 works.)
+ *  When INFNAN_CHECK is #defined and No_Hex_NaN is not #defined,
+ *  strtod also accepts (case insensitively) strings of the form
+ *  NaN(x), where x is a string of hexadecimal digits and spaces;
+ *  if there is only one string of hexadecimal digits, it is taken
+ *  for the 52 fraction bits of the resulting NaN; if there are two
+ *  or more strings of hex digits, the first is for the high 20 bits,
+ *  the second and subsequent for the low 32 bits, with intervening
+ *  white space ignored; but if this results in none of the 52
+ *  fraction bits being on (an IEEE Infinity symbol), then NAN_WORD0
+ *  and NAN_WORD1 are used instead.
+ * #define MULTIPLE_THREADS if the system offers preemptively scheduled
+ *  multiple threads.  In this case, you must provide (or suitably
+ *  #define) two locks, acquired by ACQUIRE_DTOA_LOCK(n) and freed
+ *  by FREE_DTOA_LOCK(n) for n = 0 or 1.  (The second lock, accessed
+ *  in pow5mult, ensures lazy evaluation of only one copy of high
+ *  powers of 5; omitting this lock would introduce a small
+ *  probability of wasting memory, but would otherwise be harmless.)
+ *  You must also invoke freedtoa(s) to free the value s returned by
+ *  dtoa.  You may do so whether or not MULTIPLE_THREADS is #defined.
+ * #define NO_IEEE_Scale to disable new (Feb. 1997) logic in strtod that
+ *  avoids underflows on inputs whose result does not underflow.
+ *  If you #define NO_IEEE_Scale on a machine that uses IEEE-format
+ *  floating-point numbers and flushes underflows to zero rather
+ *  than implementing gradual underflow, then you must also #define
+ *  Sudden_Underflow.
+ * #define USE_LOCALE to use the current locale's decimal_point value.
+ * #define SET_INEXACT if IEEE arithmetic is being used and extra
+ *  computation should be done to set the inexact flag when the
+ *  result is inexact and avoid setting inexact when the result
+ *  is exact.  In this case, dtoa.c must be compiled in
+ *  an environment, perhaps provided by #include "dtoa.c" in a
+ *  suitable wrapper, that defines two functions,
+ *      int get_inexact(void);
+ *      void clear_inexact(void);
+ *  such that get_inexact() returns a nonzero value if the
+ *  inexact bit is already set, and clear_inexact() sets the
+ *  inexact bit to 0.  When SET_INEXACT is #defined, strtod
+ *  also does extra computations to set the underflow and overflow
+ *  flags when appropriate (i.e., when the result is tiny and
+ *  inexact or when it is a numeric value rounded to +-infinity).
+ * #define NO_ERRNO if strtod should not assign errno = ERANGE when
+ *  the result overflows to +-Infinity or underflows to 0.
+ */
+
+#ifndef Long
+#define Long long
+#endif
+#ifndef ULong
+typedef unsigned Long ULong;
+#endif
+
+#ifdef DEBUG
+#include "stdio.h"
+#define Bug(x) {fprintf(stderr, "%s\n", x); exit(1);}
+#endif
+
+#include "stdlib.h"
+#include "string.h"
+
+#ifdef USE_LOCALE
+#include "locale.h"
+#endif
+
+#ifdef MALLOC
+#ifdef KR_headers
+extern char *MALLOC();
+#else
+extern void *MALLOC(size_t);
+#endif
+#else
+#define MALLOC malloc
+#endif
+
+#ifndef Omit_Private_Memory
+#ifndef PRIVATE_MEM
+#define PRIVATE_MEM 2304
+#endif
+#define PRIVATE_mem ((PRIVATE_MEM+sizeof(double)-1)/sizeof(double))
+static double private_mem[PRIVATE_mem], *pmem_next = private_mem;
+#endif
+
+#undef IEEE_Arith
+#undef Avoid_Underflow
+#ifdef IEEE_MC68k
+#define IEEE_Arith
+#endif
+#ifdef IEEE_8087
+#define IEEE_Arith
+#endif
+#ifdef IEEE_ARM
+#define IEEE_Arith
+#endif
+
+#include "errno.h"
+
+#ifdef Bad_float_h
+
+#ifdef IEEE_Arith
+#define DBL_DIG 15
+#define DBL_MAX_10_EXP 308
+#define DBL_MAX_EXP 1024
+#define FLT_RADIX 2
+#endif /*IEEE_Arith*/
+
+#ifdef IBM
+#define DBL_DIG 16
+#define DBL_MAX_10_EXP 75
+#define DBL_MAX_EXP 63
+#define FLT_RADIX 16
+#define DBL_MAX 7.2370055773322621e+75
+#endif
+
+#ifdef VAX
+#define DBL_DIG 16
+#define DBL_MAX_10_EXP 38
+#define DBL_MAX_EXP 127
+#define FLT_RADIX 2
+#define DBL_MAX 1.7014118346046923e+38
+#endif
+
+#ifndef LONG_MAX
+#define LONG_MAX 2147483647
+#endif
+
+#else /* ifndef Bad_float_h */
+#include "float.h"
+#endif /* Bad_float_h */
+
+#ifndef __MATH_H__
+#include "math.h"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef CONST
+#ifdef KR_headers
+#define CONST /* blank */
+#else
+#define CONST const
+#endif
+#endif
+
+#if defined(IEEE_8087) + defined(IEEE_MC68k) + defined(IEEE_ARM) + defined(VAX) + defined(IBM) != 1
+Exactly one of IEEE_8087, IEEE_MC68k, IEEE_ARM, VAX, or IBM should be defined.
+#endif
+
+typedef union {
+    double d;
+    ULong L[2];
+} U;
+
+#define dval(x) (x).d
+#ifdef IEEE_8087
+#define word0(x) (x).L[1]
+#define word1(x) (x).L[0]
+#else
+#define word0(x) (x).L[0]
+#define word1(x) (x).L[1]
+#endif
+
+/* The following definition of Storeinc is appropriate for MIPS processors.
+ * An alternative that might be better on some machines is
+ * #define Storeinc(a,b,c) (*a++ = b << 16 | c & 0xffff)
+ */
+#if defined(IEEE_8087) + defined(IEEE_ARM) + defined(VAX)
+#define Storeinc(a,b,c) (((unsigned short *)a)[1] = (unsigned short)b, \
+((unsigned short *)a)[0] = (unsigned short)c, a++)
+#else
+#define Storeinc(a,b,c) (((unsigned short *)a)[0] = (unsigned short)b, \
+((unsigned short *)a)[1] = (unsigned short)c, a++)
+#endif
+
+/* #define P DBL_MANT_DIG */
+/* Ten_pmax = floor(P*log(2)/log(5)) */
+/* Bletch = (highest power of 2 < DBL_MAX_10_EXP) / 16 */
+/* Quick_max = floor((P-1)*log(FLT_RADIX)/log(10) - 1) */
+/* Int_max = floor(P*log(FLT_RADIX)/log(10) - 1) */
+
+#ifdef IEEE_Arith
+#define Exp_shift  20
+#define Exp_shift1 20
+#define Exp_msk1    0x100000
+#define Exp_msk11   0x100000
+#define Exp_mask  0x7ff00000
+#define P 53
+#define Bias 1023
+#define Emin (-1022)
+#define Exp_1  0x3ff00000
+#define Exp_11 0x3ff00000
+#define Ebits 11
+#define Frac_mask  0xfffff
+#define Frac_mask1 0xfffff
+#define Ten_pmax 22
+#define Bletch 0x10
+#define Bndry_mask  0xfffff
+#define Bndry_mask1 0xfffff
+#define LSB 1
+#define Sign_bit 0x80000000
+#define Log2P 1
+#define Tiny0 0
+#define Tiny1 1
+#define Quick_max 14
+#define Int_max 14
+#ifndef NO_IEEE_Scale
+#define Avoid_Underflow
+#ifdef Flush_Denorm /* debugging option */
+#undef Sudden_Underflow
+#endif
+#endif
+
+#ifndef Flt_Rounds
+#ifdef FLT_ROUNDS
+#define Flt_Rounds FLT_ROUNDS
+#else
+#define Flt_Rounds 1
+#endif
+#endif /*Flt_Rounds*/
+
+#ifdef Honor_FLT_ROUNDS
+#define Rounding rounding
+#undef Check_FLT_ROUNDS
+#define Check_FLT_ROUNDS
+#else
+#define Rounding Flt_Rounds
+#endif
+
+#else /* ifndef IEEE_Arith */
+#undef Check_FLT_ROUNDS
+#undef Honor_FLT_ROUNDS
+#undef SET_INEXACT
+#undef  Sudden_Underflow
+#define Sudden_Underflow
+#ifdef IBM
+#undef Flt_Rounds
+#define Flt_Rounds 0
+#define Exp_shift  24
+#define Exp_shift1 24
+#define Exp_msk1   0x1000000
+#define Exp_msk11  0x1000000
+#define Exp_mask  0x7f000000
+#define P 14
+#define Bias 65
+#define Exp_1  0x41000000
+#define Exp_11 0x41000000
+#define Ebits 8 /* exponent has 7 bits, but 8 is the right value in b2d */
+#define Frac_mask  0xffffff
+#define Frac_mask1 0xffffff
+#define Bletch 4
+#define Ten_pmax 22
+#define Bndry_mask  0xefffff
+#define Bndry_mask1 0xffffff
+#define LSB 1
+#define Sign_bit 0x80000000
+#define Log2P 4
+#define Tiny0 0x100000
+#define Tiny1 0
+#define Quick_max 14
+#define Int_max 15
+#else /* VAX */
+#undef Flt_Rounds
+#define Flt_Rounds 1
+#define Exp_shift  23
+#define Exp_shift1 7
+#define Exp_msk1    0x80
+#define Exp_msk11   0x800000
+#define Exp_mask  0x7f80
+#define P 56
+#define Bias 129
+#define Exp_1  0x40800000
+#define Exp_11 0x4080
+#define Ebits 8
+#define Frac_mask  0x7fffff
+#define Frac_mask1 0xffff007f
+#define Ten_pmax 24
+#define Bletch 2
+#define Bndry_mask  0xffff007f
+#define Bndry_mask1 0xffff007f
+#define LSB 0x10000
+#define Sign_bit 0x8000
+#define Log2P 1
+#define Tiny0 0x80
+#define Tiny1 0
+#define Quick_max 15
+#define Int_max 15
+#endif /* IBM, VAX */
+#endif /* IEEE_Arith */
+
+#ifndef IEEE_Arith
+#define ROUND_BIASED
+#endif
+
+#ifdef RND_PRODQUOT
+#define rounded_product(a,b) a = rnd_prod(a, b)
+#define rounded_quotient(a,b) a = rnd_quot(a, b)
+#ifdef KR_headers
+extern double rnd_prod(), rnd_quot();
+#else
+extern double rnd_prod(double, double), rnd_quot(double, double);
+#endif
+#else
+#define rounded_product(a,b) a *= b
+#define rounded_quotient(a,b) a /= b
+#endif
+
+#define Big0 (Frac_mask1 | Exp_msk1*(DBL_MAX_EXP+Bias-1))
+#define Big1 0xffffffff
+
+#ifndef Pack_32
+#define Pack_32
+#endif
+
+#ifdef KR_headers
+#define FFFFFFFF ((((unsigned long)0xffff)<<16)|(unsigned long)0xffff)
+#else
+#define FFFFFFFF 0xffffffffUL
+#endif
+
+#ifdef NO_LONG_LONG
+#undef ULLong
+#ifdef Just_16
+#undef Pack_32
+/* When Pack_32 is not defined, we store 16 bits per 32-bit Long.
+ * This makes some inner loops simpler and sometimes saves work
+ * during multiplications, but it often seems to make things slightly
+ * slower.  Hence the default is now to store 32 bits per Long.
+ */
+#endif
+#else   /* long long available */
+#ifndef Llong
+#define Llong long long
+#endif
+#ifndef ULLong
+#define ULLong unsigned Llong
+#endif
+#endif /* NO_LONG_LONG */
+
+#ifndef MULTIPLE_THREADS
+#define ACQUIRE_DTOA_LOCK(n)    /*nothing*/
+#define FREE_DTOA_LOCK(n)   /*nothing*/
+#endif
+
+#define Kmax 7
+
+struct
+    Bigint {
+    struct Bigint *next;
+    int k, maxwds, sign, wds;
+    ULong x[1];
+};
+
+typedef struct Bigint Bigint;
+
+static Bigint *freelist[Kmax+1];
+
+static Bigint *
+Balloc
+#ifdef KR_headers
+(k) int k;
+#else
+(int k)
+#endif
+{
+    int x;
+    Bigint *rv;
+#ifndef Omit_Private_Memory
+    unsigned int len;
+#endif
+
+    ACQUIRE_DTOA_LOCK(0);
+    /* The k > Kmax case does not need ACQUIRE_DTOA_LOCK(0), */
+    /* but this case seems very unlikely. */
+    if (k <= Kmax && (rv = freelist[k])) {
+        freelist[k] = rv->next;
+    }
+    else {
+        x = 1 << k;
+#ifdef Omit_Private_Memory
+        rv = (Bigint *)MALLOC(sizeof(Bigint) + (x-1)*sizeof(ULong));
+#else
+        len = (sizeof(Bigint) + (x-1)*sizeof(ULong) + sizeof(double) - 1)
+              /sizeof(double);
+        if (k <= Kmax && pmem_next - private_mem + len <= PRIVATE_mem) {
+            rv = (Bigint*)pmem_next;
+            pmem_next += len;
+        }
+        else {
+            rv = (Bigint*)MALLOC(len*sizeof(double));
+        }
+#endif
+        rv->k = k;
+        rv->maxwds = x;
+    }
+    FREE_DTOA_LOCK(0);
+    rv->sign = rv->wds = 0;
+    return rv;
+}
+
+static void
+Bfree
+#ifdef KR_headers
+(v) Bigint *v;
+#else
+(Bigint *v)
+#endif
+{
+    if (v) {
+        if (v->k > Kmax)
+#ifdef FREE
+            FREE((void*)v);
+#else
+            free((void*)v);
+#endif
+        else {
+            ACQUIRE_DTOA_LOCK(0);
+            v->next = freelist[v->k];
+            freelist[v->k] = v;
+            FREE_DTOA_LOCK(0);
+        }
+    }
+}
+
+#define Bcopy(x,y) memcpy((char *)&x->sign, (char *)&y->sign, \
+y->wds*sizeof(Long) + 2*sizeof(int))
+
+static Bigint *
+multadd
+#ifdef KR_headers
+(b, m, a) Bigint *b; int m, a;
+#else
+(Bigint *b, int m, int a)   /* multiply by m and add a */
+#endif
+{
+    int i, wds;
+#ifdef ULLong
+    ULong *x;
+    ULLong carry, y;
+#else
+    ULong carry, *x, y;
+#ifdef Pack_32
+    ULong xi, z;
+#endif
+#endif
+    Bigint *b1;
+
+    wds = b->wds;
+    x = b->x;
+    i = 0;
+    carry = a;
+    do {
+#ifdef ULLong
+        y = *x * (ULLong)m + carry;
+        carry = y >> 32;
+        *x++ = y & FFFFFFFF;
+#else
+#ifdef Pack_32
+        xi = *x;
+        y = (xi & 0xffff) * m + carry;
+        z = (xi >> 16) * m + (y >> 16);
+        carry = z >> 16;
+        *x++ = (z << 16) + (y & 0xffff);
+#else
+        y = *x * m + carry;
+        carry = y >> 16;
+        *x++ = y & 0xffff;
+#endif
+#endif
+    }
+    while(++i < wds);
+    if (carry) {
+        if (wds >= b->maxwds) {
+            b1 = Balloc(b->k+1);
+            Bcopy(b1, b);
+            Bfree(b);
+            b = b1;
+        }
+        b->x[wds++] = carry;
+        b->wds = wds;
+    }
+    return b;
+}
+
+static Bigint *
+s2b
+#ifdef KR_headers
+(s, nd0, nd, y9) CONST char *s; int nd0, nd; ULong y9;
+#else
+(CONST char *s, int nd0, int nd, ULong y9)
+#endif
+{
+    Bigint *b;
+    int i, k;
+    Long x, y;
+
+    x = (nd + 8) / 9;
+    for(k = 0, y = 1; x > y; y <<= 1, k++) ;
+#ifdef Pack_32
+    b = Balloc(k);
+    b->x[0] = y9;
+    b->wds = 1;
+#else
+    b = Balloc(k+1);
+    b->x[0] = y9 & 0xffff;
+    b->wds = (b->x[1] = y9 >> 16) ? 2 : 1;
+#endif
+
+    i = 9;
+    if (9 < nd0) {
+        s += 9;
+        do {
+            b = multadd(b, 10, *s++ - '0');
+        }
+        while(++i < nd0);
+        s++;
+    }
+    else {
+        s += 10;
+    }
+    for(; i < nd; i++) {
+        b = multadd(b, 10, *s++ - '0');
+    }
+    return b;
+}
+
+static int
+hi0bits
+#ifdef KR_headers
+(x) register ULong x;
+#else
+(register ULong x)
+#endif
+{
+#ifdef PR_HAVE_BUILTIN_BITSCAN32
+    return( (!x) ? 32 : pr_bitscan_clz32(x) );
+#else
+    register int k = 0;
+
+    if (!(x & 0xffff0000)) {
+        k = 16;
+        x <<= 16;
+    }
+    if (!(x & 0xff000000)) {
+        k += 8;
+        x <<= 8;
+    }
+    if (!(x & 0xf0000000)) {
+        k += 4;
+        x <<= 4;
+    }
+    if (!(x & 0xc0000000)) {
+        k += 2;
+        x <<= 2;
+    }
+    if (!(x & 0x80000000)) {
+        k++;
+        if (!(x & 0x40000000)) {
+            return 32;
+        }
+    }
+    return k;
+#endif /* PR_HAVE_BUILTIN_BITSCAN32 */
+}
+
+static int
+lo0bits
+#ifdef KR_headers
+(y) ULong *y;
+#else
+(ULong *y)
+#endif
+{
+#ifdef PR_HAVE_BUILTIN_BITSCAN32
+    int k;
+    ULong x = *y;
+
+    if (x>1) {
+        *y = ( x >> (k = pr_bitscan_ctz32(x)) );
+    }
+    else {
+        k = ((x ^ 1) << 5);
+    }
+#else
+    register int k;
+    register ULong x = *y;
+
+    if (x & 7) {
+        if (x & 1) {
+            return 0;
+        }
+        if (x & 2) {
+            *y = x >> 1;
+            return 1;
+        }
+        *y = x >> 2;
+        return 2;
+    }
+    k = 0;
+    if (!(x & 0xffff)) {
+        k = 16;
+        x >>= 16;
+    }
+    if (!(x & 0xff)) {
+        k += 8;
+        x >>= 8;
+    }
+    if (!(x & 0xf)) {
+        k += 4;
+        x >>= 4;
+    }
+    if (!(x & 0x3)) {
+        k += 2;
+        x >>= 2;
+    }
+    if (!(x & 1)) {
+        k++;
+        x >>= 1;
+        if (!x) {
+            return 32;
+        }
+    }
+    *y = x;
+#endif /* PR_HAVE_BUILTIN_BITSCAN32 */
+    return k;
+}
+
+static Bigint *
+i2b
+#ifdef KR_headers
+(i) int i;
+#else
+(int i)
+#endif
+{
+    Bigint *b;
+
+    b = Balloc(1);
+    b->x[0] = i;
+    b->wds = 1;
+    return b;
+}
+
+static Bigint *
+mult
+#ifdef KR_headers
+(a, b) Bigint *a, *b;
+#else
+(Bigint *a, Bigint *b)
+#endif
+{
+    Bigint *c;
+    int k, wa, wb, wc;
+    ULong *x, *xa, *xae, *xb, *xbe, *xc, *xc0;
+    ULong y;
+#ifdef ULLong
+    ULLong carry, z;
+#else
+    ULong carry, z;
+#ifdef Pack_32
+    ULong z2;
+#endif
+#endif
+
+    if (a->wds < b->wds) {
+        c = a;
+        a = b;
+        b = c;
+    }
+    k = a->k;
+    wa = a->wds;
+    wb = b->wds;
+    wc = wa + wb;
+    if (wc > a->maxwds) {
+        k++;
+    }
+    c = Balloc(k);
+    for(x = c->x, xa = x + wc; x < xa; x++) {
+        *x = 0;
+    }
+    xa = a->x;
+    xae = xa + wa;
+    xb = b->x;
+    xbe = xb + wb;
+    xc0 = c->x;
+#ifdef ULLong
+    for(; xb < xbe; xc0++) {
+        if (y = *xb++) {
+            x = xa;
+            xc = xc0;
+            carry = 0;
+            do {
+                z = *x++ * (ULLong)y + *xc + carry;
+                carry = z >> 32;
+                *xc++ = z & FFFFFFFF;
+            }
+            while(x < xae);
+            *xc = carry;
+        }
+    }
+#else
+#ifdef Pack_32
+    for(; xb < xbe; xb++, xc0++) {
+        if (y = *xb & 0xffff) {
+            x = xa;
+            xc = xc0;
+            carry = 0;
+            do {
+                z = (*x & 0xffff) * y + (*xc & 0xffff) + carry;
+                carry = z >> 16;
+                z2 = (*x++ >> 16) * y + (*xc >> 16) + carry;
+                carry = z2 >> 16;
+                Storeinc(xc, z2, z);
+            }
+            while(x < xae);
+            *xc = carry;
+        }
+        if (y = *xb >> 16) {
+            x = xa;
+            xc = xc0;
+            carry = 0;
+            z2 = *xc;
+            do {
+                z = (*x & 0xffff) * y + (*xc >> 16) + carry;
+                carry = z >> 16;
+                Storeinc(xc, z, z2);
+                z2 = (*x++ >> 16) * y + (*xc & 0xffff) + carry;
+                carry = z2 >> 16;
+            }
+            while(x < xae);
+            *xc = z2;
+        }
+    }
+#else
+    for(; xb < xbe; xc0++) {
+        if (y = *xb++) {
+            x = xa;
+            xc = xc0;
+            carry = 0;
+            do {
+                z = *x++ * y + *xc + carry;
+                carry = z >> 16;
+                *xc++ = z & 0xffff;
+            }
+            while(x < xae);
+            *xc = carry;
+        }
+    }
+#endif
+#endif
+    for(xc0 = c->x, xc = xc0 + wc; wc > 0 && !*--xc; --wc) ;
+    c->wds = wc;
+    return c;
+}
+
+static Bigint *p5s;
+
+static Bigint *
+pow5mult
+#ifdef KR_headers
+(b, k) Bigint *b; int k;
+#else
+(Bigint *b, int k)
+#endif
+{
+    Bigint *b1, *p5, *p51;
+    int i;
+    static int p05[3] = { 5, 25, 125 };
+
+    if (i = k & 3) {
+        b = multadd(b, p05[i-1], 0);
+    }
+
+    if (!(k >>= 2)) {
+        return b;
+    }
+    if (!(p5 = p5s)) {
+        /* first time */
+#ifdef MULTIPLE_THREADS
+        ACQUIRE_DTOA_LOCK(1);
+        if (!(p5 = p5s)) {
+            p5 = p5s = i2b(625);
+            p5->next = 0;
+        }
+        FREE_DTOA_LOCK(1);
+#else
+        p5 = p5s = i2b(625);
+        p5->next = 0;
+#endif
+    }
+    for(;;) {
+        if (k & 1) {
+            b1 = mult(b, p5);
+            Bfree(b);
+            b = b1;
+        }
+        if (!(k >>= 1)) {
+            break;
+        }
+        if (!(p51 = p5->next)) {
+#ifdef MULTIPLE_THREADS
+            ACQUIRE_DTOA_LOCK(1);
+            if (!(p51 = p5->next)) {
+                p51 = p5->next = mult(p5,p5);
+                p51->next = 0;
+            }
+            FREE_DTOA_LOCK(1);
+#else
+            p51 = p5->next = mult(p5,p5);
+            p51->next = 0;
+#endif
+        }
+        p5 = p51;
+    }
+    return b;
+}
+
+static Bigint *
+lshift
+#ifdef KR_headers
+(b, k) Bigint *b; int k;
+#else
+(Bigint *b, int k)
+#endif
+{
+    int i, k1, n, n1;
+    Bigint *b1;
+    ULong *x, *x1, *xe, z;
+
+#ifdef Pack_32
+    n = k >> 5;
+#else
+    n = k >> 4;
+#endif
+    k1 = b->k;
+    n1 = n + b->wds + 1;
+    for(i = b->maxwds; n1 > i; i <<= 1) {
+        k1++;
+    }
+    b1 = Balloc(k1);
+    x1 = b1->x;
+    for(i = 0; i < n; i++) {
+        *x1++ = 0;
+    }
+    x = b->x;
+    xe = x + b->wds;
+#ifdef Pack_32
+    if (k &= 0x1f) {
+        k1 = 32 - k;
+        z = 0;
+        do {
+            *x1++ = *x << k | z;
+            z = *x++ >> k1;
+        }
+        while(x < xe);
+        if (*x1 = z) {
+            ++n1;
+        }
+    }
+#else
+    if (k &= 0xf) {
+        k1 = 16 - k;
+        z = 0;
+        do {
+            *x1++ = *x << k  & 0xffff | z;
+            z = *x++ >> k1;
+        }
+        while(x < xe);
+        if (*x1 = z) {
+            ++n1;
+        }
+    }
+#endif
+    else do {
+            *x1++ = *x++;
+        }
+        while(x < xe);
+    b1->wds = n1 - 1;
+    Bfree(b);
+    return b1;
+}
+
+static int
+cmp
+#ifdef KR_headers
+(a, b) Bigint *a, *b;
+#else
+(Bigint *a, Bigint *b)
+#endif
+{
+    ULong *xa, *xa0, *xb, *xb0;
+    int i, j;
+
+    i = a->wds;
+    j = b->wds;
+#ifdef DEBUG
+    if (i > 1 && !a->x[i-1]) {
+        Bug("cmp called with a->x[a->wds-1] == 0");
+    }
+    if (j > 1 && !b->x[j-1]) {
+        Bug("cmp called with b->x[b->wds-1] == 0");
+    }
+#endif
+    if (i -= j) {
+        return i;
+    }
+    xa0 = a->x;
+    xa = xa0 + j;
+    xb0 = b->x;
+    xb = xb0 + j;
+    for(;;) {
+        if (*--xa != *--xb) {
+            return *xa < *xb ? -1 : 1;
+        }
+        if (xa <= xa0) {
+            break;
+        }
+    }
+    return 0;
+}
+
+static Bigint *
+diff
+#ifdef KR_headers
+(a, b) Bigint *a, *b;
+#else
+(Bigint *a, Bigint *b)
+#endif
+{
+    Bigint *c;
+    int i, wa, wb;
+    ULong *xa, *xae, *xb, *xbe, *xc;
+#ifdef ULLong
+    ULLong borrow, y;
+#else
+    ULong borrow, y;
+#ifdef Pack_32
+    ULong z;
+#endif
+#endif
+
+    i = cmp(a,b);
+    if (!i) {
+        c = Balloc(0);
+        c->wds = 1;
+        c->x[0] = 0;
+        return c;
+    }
+    if (i < 0) {
+        c = a;
+        a = b;
+        b = c;
+        i = 1;
+    }
+    else {
+        i = 0;
+    }
+    c = Balloc(a->k);
+    c->sign = i;
+    wa = a->wds;
+    xa = a->x;
+    xae = xa + wa;
+    wb = b->wds;
+    xb = b->x;
+    xbe = xb + wb;
+    xc = c->x;
+    borrow = 0;
+#ifdef ULLong
+    do {
+        y = (ULLong)*xa++ - *xb++ - borrow;
+        borrow = y >> 32 & (ULong)1;
+        *xc++ = y & FFFFFFFF;
+    }
+    while(xb < xbe);
+    while(xa < xae) {
+        y = *xa++ - borrow;
+        borrow = y >> 32 & (ULong)1;
+        *xc++ = y & FFFFFFFF;
+    }
+#else
+#ifdef Pack_32
+    do {
+        y = (*xa & 0xffff) - (*xb & 0xffff) - borrow;
+        borrow = (y & 0x10000) >> 16;
+        z = (*xa++ >> 16) - (*xb++ >> 16) - borrow;
+        borrow = (z & 0x10000) >> 16;
+        Storeinc(xc, z, y);
+    }
+    while(xb < xbe);
+    while(xa < xae) {
+        y = (*xa & 0xffff) - borrow;
+        borrow = (y & 0x10000) >> 16;
+        z = (*xa++ >> 16) - borrow;
+        borrow = (z & 0x10000) >> 16;
+        Storeinc(xc, z, y);
+    }
+#else
+    do {
+        y = *xa++ - *xb++ - borrow;
+        borrow = (y & 0x10000) >> 16;
+        *xc++ = y & 0xffff;
+    }
+    while(xb < xbe);
+    while(xa < xae) {
+        y = *xa++ - borrow;
+        borrow = (y & 0x10000) >> 16;
+        *xc++ = y & 0xffff;
+    }
+#endif
+#endif
+    while(!*--xc) {
+        wa--;
+    }
+    c->wds = wa;
+    return c;
+}
+
+static double
+ulp
+#ifdef KR_headers
+(dx) double dx;
+#else
+(double dx)
+#endif
+{
+    register Long L;
+    U x, a;
+
+    dval(x) = dx;
+    L = (word0(x) & Exp_mask) - (P-1)*Exp_msk1;
+#ifndef Avoid_Underflow
+#ifndef Sudden_Underflow
+    if (L > 0) {
+#endif
+#endif
+#ifdef IBM
+        L |= Exp_msk1 >> 4;
+#endif
+        word0(a) = L;
+        word1(a) = 0;
+#ifndef Avoid_Underflow
+#ifndef Sudden_Underflow
+    }
+    else {
+        L = -L >> Exp_shift;
+        if (L < Exp_shift) {
+            word0(a) = 0x80000 >> L;
+            word1(a) = 0;
+        }
+        else {
+            word0(a) = 0;
+            L -= Exp_shift;
+            word1(a) = L >= 31 ? 1 : 1 << 31 - L;
+        }
+    }
+#endif
+#endif
+    return dval(a);
+}
+
+static double
+b2d
+#ifdef KR_headers
+(a, e) Bigint *a; int *e;
+#else
+(Bigint *a, int *e)
+#endif
+{
+    ULong *xa, *xa0, w, y, z;
+    int k;
+    U d;
+#ifdef VAX
+    ULong d0, d1;
+#else
+#define d0 word0(d)
+#define d1 word1(d)
+#endif
+
+    xa0 = a->x;
+    xa = xa0 + a->wds;
+    y = *--xa;
+#ifdef DEBUG
+    if (!y) {
+        Bug("zero y in b2d");
+    }
+#endif
+    k = hi0bits(y);
+    *e = 32 - k;
+#ifdef Pack_32
+    if (k < Ebits) {
+        d0 = Exp_1 | y >> Ebits - k;
+        w = xa > xa0 ? *--xa : 0;
+        d1 = y << (32-Ebits) + k | w >> Ebits - k;
+        goto ret_d;
+    }
+    z = xa > xa0 ? *--xa : 0;
+    if (k -= Ebits) {
+        d0 = Exp_1 | y << k | z >> 32 - k;
+        y = xa > xa0 ? *--xa : 0;
+        d1 = z << k | y >> 32 - k;
+    }
+    else {
+        d0 = Exp_1 | y;
+        d1 = z;
+    }
+#else
+    if (k < Ebits + 16) {
+        z = xa > xa0 ? *--xa : 0;
+        d0 = Exp_1 | y << k - Ebits | z >> Ebits + 16 - k;
+        w = xa > xa0 ? *--xa : 0;
+        y = xa > xa0 ? *--xa : 0;
+        d1 = z << k + 16 - Ebits | w << k - Ebits | y >> 16 + Ebits - k;
+        goto ret_d;
+    }
+    z = xa > xa0 ? *--xa : 0;
+    w = xa > xa0 ? *--xa : 0;
+    k -= Ebits + 16;
+    d0 = Exp_1 | y << k + 16 | z << k | w >> 16 - k;
+    y = xa > xa0 ? *--xa : 0;
+    d1 = w << k + 16 | y << k;
+#endif
+ret_d:
+#ifdef VAX
+    word0(d) = d0 >> 16 | d0 << 16;
+    word1(d) = d1 >> 16 | d1 << 16;
+#else
+#undef d0
+#undef d1
+#endif
+    return dval(d);
+}
+
+static Bigint *
+d2b
+#ifdef KR_headers
+(dd, e, bits) double dd; int *e, *bits;
+#else
+(double dd, int *e, int *bits)
+#endif
+{
+    U d;
+    Bigint *b;
+    int de, k;
+    ULong *x, y, z;
+#ifndef Sudden_Underflow
+    int i;
+#endif
+#ifdef VAX
+    ULong d0, d1;
+#endif
+
+    dval(d) = dd;
+#ifdef VAX
+    d0 = word0(d) >> 16 | word0(d) << 16;
+    d1 = word1(d) >> 16 | word1(d) << 16;
+#else
+#define d0 word0(d)
+#define d1 word1(d)
+#endif
+
+#ifdef Pack_32
+    b = Balloc(1);
+#else
+    b = Balloc(2);
+#endif
+    x = b->x;
+
+    z = d0 & Frac_mask;
+    d0 &= 0x7fffffff;   /* clear sign bit, which we ignore */
+#ifdef Sudden_Underflow
+    de = (int)(d0 >> Exp_shift);
+#ifndef IBM
+    z |= Exp_msk11;
+#endif
+#else
+    if (de = (int)(d0 >> Exp_shift)) {
+        z |= Exp_msk1;
+    }
+#endif
+#ifdef Pack_32
+    if (y = d1) {
+        if (k = lo0bits(&y)) {
+            x[0] = y | z << 32 - k;
+            z >>= k;
+        }
+        else {
+            x[0] = y;
+        }
+#ifndef Sudden_Underflow
+        i =
+#endif
+            b->wds = (x[1] = z) ? 2 : 1;
+    }
+    else {
+        k = lo0bits(&z);
+        x[0] = z;
+#ifndef Sudden_Underflow
+        i =
+#endif
+            b->wds = 1;
+        k += 32;
+    }
+#else
+    if (y = d1) {
+        if (k = lo0bits(&y))
+            if (k >= 16) {
+                x[0] = y | z << 32 - k & 0xffff;
+                x[1] = z >> k - 16 & 0xffff;
+                x[2] = z >> k;
+                i = 2;
+            }
+            else {
+                x[0] = y & 0xffff;
+                x[1] = y >> 16 | z << 16 - k & 0xffff;
+                x[2] = z >> k & 0xffff;
+                x[3] = z >> k+16;
+                i = 3;
+            }
+        else {
+            x[0] = y & 0xffff;
+            x[1] = y >> 16;
+            x[2] = z & 0xffff;
+            x[3] = z >> 16;
+            i = 3;
+        }
+    }
+    else {
+#ifdef DEBUG
+        if (!z) {
+            Bug("Zero passed to d2b");
+        }
+#endif
+        k = lo0bits(&z);
+        if (k >= 16) {
+            x[0] = z;
+            i = 0;
+        }
+        else {
+            x[0] = z & 0xffff;
+            x[1] = z >> 16;
+            i = 1;
+        }
+        k += 32;
+    }
+    while(!x[i]) {
+        --i;
+    }
+    b->wds = i + 1;
+#endif
+#ifndef Sudden_Underflow
+    if (de) {
+#endif
+#ifdef IBM
+        *e = (de - Bias - (P-1) << 2) + k;
+        *bits = 4*P + 8 - k - hi0bits(word0(d) & Frac_mask);
+#else
+        *e = de - Bias - (P-1) + k;
+        *bits = P - k;
+#endif
+#ifndef Sudden_Underflow
+    }
+    else {
+        *e = de - Bias - (P-1) + 1 + k;
+#ifdef Pack_32
+        *bits = 32*i - hi0bits(x[i-1]);
+#else
+        *bits = (i+2)*16 - hi0bits(x[i]);
+#endif
+    }
+#endif
+    return b;
+}
+#undef d0
+#undef d1
+
+static double
+ratio
+#ifdef KR_headers
+(a, b) Bigint *a, *b;
+#else
+(Bigint *a, Bigint *b)
+#endif
+{
+    U da, db;
+    int k, ka, kb;
+
+    dval(da) = b2d(a, &ka);
+    dval(db) = b2d(b, &kb);
+#ifdef Pack_32
+    k = ka - kb + 32*(a->wds - b->wds);
+#else
+    k = ka - kb + 16*(a->wds - b->wds);
+#endif
+#ifdef IBM
+    if (k > 0) {
+        word0(da) += (k >> 2)*Exp_msk1;
+        if (k &= 3) {
+            dval(da) *= 1 << k;
+        }
+    }
+    else {
+        k = -k;
+        word0(db) += (k >> 2)*Exp_msk1;
+        if (k &= 3) {
+            dval(db) *= 1 << k;
+        }
+    }
+#else
+    if (k > 0) {
+        word0(da) += k*Exp_msk1;
+    }
+    else {
+        k = -k;
+        word0(db) += k*Exp_msk1;
+    }
+#endif
+    return dval(da) / dval(db);
+}
+
+static CONST double
+tens[] = {
+    1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9,
+    1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19,
+    1e20, 1e21, 1e22
+#ifdef VAX
+    , 1e23, 1e24
+#endif
+};
+
+static CONST double
+#ifdef IEEE_Arith
+bigtens[] = { 1e16, 1e32, 1e64, 1e128, 1e256 };
+static CONST double tinytens[] = { 1e-16, 1e-32, 1e-64, 1e-128,
+#ifdef Avoid_Underflow
+                                   9007199254740992.*9007199254740992.e-256
+                                   /* = 2^106 * 1e-53 */
+#else
+                                   1e-256
+#endif
+                                 };
+/* The factor of 2^53 in tinytens[4] helps us avoid setting the underflow */
+/* flag unnecessarily.  It leads to a song and dance at the end of strtod. */
+#define Scale_Bit 0x10
+#define n_bigtens 5
+#else
+#ifdef IBM
+bigtens[] = { 1e16, 1e32, 1e64 };
+static CONST double tinytens[] = { 1e-16, 1e-32, 1e-64 };
+#define n_bigtens 3
+#else
+bigtens[] = { 1e16, 1e32 };
+static CONST double tinytens[] = { 1e-16, 1e-32 };
+#define n_bigtens 2
+#endif
+#endif
+
+#ifndef IEEE_Arith
+#undef INFNAN_CHECK
+#endif
+
+#ifdef INFNAN_CHECK
+
+#ifndef NAN_WORD0
+#define NAN_WORD0 0x7ff80000
+#endif
+
+#ifndef NAN_WORD1
+#define NAN_WORD1 0
+#endif
+
+static int
+match
+#ifdef KR_headers
+(sp, t) char **sp, *t;
+#else
+(CONST char **sp, char *t)
+#endif
+{
+    int c, d;
+    CONST char *s = *sp;
+
+    while(d = *t++) {
+        if ((c = *++s) >= 'A' && c <= 'Z') {
+            c += 'a' - 'A';
+        }
+        if (c != d) {
+            return 0;
+        }
+    }
+    *sp = s + 1;
+    return 1;
+}
+
+#ifndef No_Hex_NaN
+static void
+hexnan
+#ifdef KR_headers
+(rvp, sp) double *rvp; CONST char **sp;
+#else
+(double *rvp, CONST char **sp)
+#endif
+{
+    ULong c, x[2];
+    CONST char *s;
+    int havedig, udx0, xshift;
+
+    x[0] = x[1] = 0;
+    havedig = xshift = 0;
+    udx0 = 1;
+    s = *sp;
+    while(c = *(CONST unsigned char*)++s) {
+        if (c >= '0' && c <= '9') {
+            c -= '0';
+        }
+        else if (c >= 'a' && c <= 'f') {
+            c += 10 - 'a';
+        }
+        else if (c >= 'A' && c <= 'F') {
+            c += 10 - 'A';
+        }
+        else if (c <= ' ') {
+            if (udx0 && havedig) {
+                udx0 = 0;
+                xshift = 1;
+            }
+            continue;
+        }
+        else if (/*(*/ c == ')' && havedig) {
+            *sp = s + 1;
+            break;
+        }
+        else {
+            return;    /* invalid form: don't change *sp */
+        }
+        havedig = 1;
+        if (xshift) {
+            xshift = 0;
+            x[0] = x[1];
+            x[1] = 0;
+        }
+        if (udx0) {
+            x[0] = (x[0] << 4) | (x[1] >> 28);
+        }
+        x[1] = (x[1] << 4) | c;
+    }
+    if ((x[0] &= 0xfffff) || x[1]) {
+        word0(*rvp) = Exp_mask | x[0];
+        word1(*rvp) = x[1];
+    }
+}
+#endif /*No_Hex_NaN*/
+#endif /* INFNAN_CHECK */
+
+PR_IMPLEMENT(double)
+PR_strtod
+#ifdef KR_headers
+(s00, se) CONST char *s00; char **se;
+#else
+(CONST char *s00, char **se)
+#endif
+{
+#ifdef Avoid_Underflow
+    int scale;
+#endif
+    int bb2, bb5, bbe, bd2, bd5, bbbits, bs2, c, dsign,
+        e, e1, esign, i, j, k, nd, nd0, nf, nz, nz0, sign;
+    CONST char *s, *s0, *s1;
+    double aadj, aadj1, adj;
+    U aadj2, rv, rv0;
+    Long L;
+    ULong y, z;
+    Bigint *bb, *bb1, *bd, *bd0, *bs, *delta;
+#ifdef SET_INEXACT
+    int inexact, oldinexact;
+#endif
+#ifdef Honor_FLT_ROUNDS
+    int rounding;
+#endif
+#ifdef USE_LOCALE
+    CONST char *s2;
+#endif
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    sign = nz0 = nz = 0;
+    dval(rv) = 0.;
+    for(s = s00;; s++) switch(*s) {
+            case '-':
+                sign = 1;
+            /* no break */
+            case '+':
+                if (*++s) {
+                    goto break2;
+                }
+            /* no break */
+            case 0:
+                goto ret0;
+            case '\t':
+            case '\n':
+            case '\v':
+            case '\f':
+            case '\r':
+            case ' ':
+                continue;
+            default:
+                goto break2;
+        }
+break2:
+    if (*s == '0') {
+        nz0 = 1;
+        while(*++s == '0') ;
+        if (!*s) {
+            goto ret;
+        }
+    }
+    s0 = s;
+    y = z = 0;
+    for(nd = nf = 0; (c = *s) >= '0' && c <= '9'; nd++, s++)
+        if (nd < 9) {
+            y = 10*y + c - '0';
+        }
+        else if (nd < 16) {
+            z = 10*z + c - '0';
+        }
+    nd0 = nd;
+#ifdef USE_LOCALE
+    s1 = localeconv()->decimal_point;
+    if (c == *s1) {
+        c = '.';
+        if (*++s1) {
+            s2 = s;
+            for(;;) {
+                if (*++s2 != *s1) {
+                    c = 0;
+                    break;
+                }
+                if (!*++s1) {
+                    s = s2;
+                    break;
+                }
+            }
+        }
+    }
+#endif
+    if (c == '.') {
+        c = *++s;
+        if (!nd) {
+            for(; c == '0'; c = *++s) {
+                nz++;
+            }
+            if (c > '0' && c <= '9') {
+                s0 = s;
+                nf += nz;
+                nz = 0;
+                goto have_dig;
+            }
+            goto dig_done;
+        }
+        for(; c >= '0' && c <= '9'; c = *++s) {
+have_dig:
+            nz++;
+            if (c -= '0') {
+                nf += nz;
+                for(i = 1; i < nz; i++)
+                    if (nd++ < 9) {
+                        y *= 10;
+                    }
+                    else if (nd <= DBL_DIG + 1) {
+                        z *= 10;
+                    }
+                if (nd++ < 9) {
+                    y = 10*y + c;
+                }
+                else if (nd <= DBL_DIG + 1) {
+                    z = 10*z + c;
+                }
+                nz = 0;
+            }
+        }
+    }
+dig_done:
+    if (nd > 64 * 1024) {
+        goto ret0;
+    }
+    e = 0;
+    if (c == 'e' || c == 'E') {
+        if (!nd && !nz && !nz0) {
+            goto ret0;
+        }
+        s00 = s;
+        esign = 0;
+        switch(c = *++s) {
+            case '-':
+                esign = 1;
+            case '+':
+                c = *++s;
+        }
+        if (c >= '0' && c <= '9') {
+            while(c == '0') {
+                c = *++s;
+            }
+            if (c > '0' && c <= '9') {
+                L = c - '0';
+                s1 = s;
+                while((c = *++s) >= '0' && c <= '9') {
+                    L = 10*L + c - '0';
+                }
+                if (s - s1 > 8 || L > 19999)
+                    /* Avoid confusion from exponents
+                     * so large that e might overflow.
+                     */
+                {
+                    e = 19999;    /* safe for 16 bit ints */
+                }
+                else {
+                    e = (int)L;
+                }
+                if (esign) {
+                    e = -e;
+                }
+            }
+            else {
+                e = 0;
+            }
+        }
+        else {
+            s = s00;
+        }
+    }
+    if (!nd) {
+        if (!nz && !nz0) {
+#ifdef INFNAN_CHECK
+            /* Check for Nan and Infinity */
+            switch(c) {
+                case 'i':
+                case 'I':
+                    if (match(&s,"nf")) {
+                        --s;
+                        if (!match(&s,"inity")) {
+                            ++s;
+                        }
+                        word0(rv) = 0x7ff00000;
+                        word1(rv) = 0;
+                        goto ret;
+                    }
+                    break;
+                case 'n':
+                case 'N':
+                    if (match(&s, "an")) {
+                        word0(rv) = NAN_WORD0;
+                        word1(rv) = NAN_WORD1;
+#ifndef No_Hex_NaN
+                        if (*s == '(') { /*)*/
+                            hexnan(&rv, &s);
+                        }
+#endif
+                        goto ret;
+                    }
+            }
+#endif /* INFNAN_CHECK */
+ret0:
+            s = s00;
+            sign = 0;
+        }
+        goto ret;
+    }
+    e1 = e -= nf;
+
+    /* Now we have nd0 digits, starting at s0, followed by a
+     * decimal point, followed by nd-nd0 digits.  The number we're
+     * after is the integer represented by those digits times
+     * 10**e */
+
+    if (!nd0) {
+        nd0 = nd;
+    }
+    k = nd < DBL_DIG + 1 ? nd : DBL_DIG + 1;
+    dval(rv) = y;
+    if (k > 9) {
+#ifdef SET_INEXACT
+        if (k > DBL_DIG) {
+            oldinexact = get_inexact();
+        }
+#endif
+        dval(rv) = tens[k - 9] * dval(rv) + z;
+    }
+    bd0 = 0;
+    if (nd <= DBL_DIG
+#ifndef RND_PRODQUOT
+#ifndef Honor_FLT_ROUNDS
+        && Flt_Rounds == 1
+#endif
+#endif
+       ) {
+        if (!e) {
+            goto ret;
+        }
+        if (e > 0) {
+            if (e <= Ten_pmax) {
+#ifdef VAX
+                goto vax_ovfl_check;
+#else
+#ifdef Honor_FLT_ROUNDS
+                /* round correctly FLT_ROUNDS = 2 or 3 */
+                if (sign) {
+                    rv = -rv;
+                    sign = 0;
+                }
+#endif
+                /* rv = */ rounded_product(dval(rv), tens[e]);
+                goto ret;
+#endif
+            }
+            i = DBL_DIG - nd;
+            if (e <= Ten_pmax + i) {
+                /* A fancier test would sometimes let us do
+                 * this for larger i values.
+                 */
+#ifdef Honor_FLT_ROUNDS
+                /* round correctly FLT_ROUNDS = 2 or 3 */
+                if (sign) {
+                    rv = -rv;
+                    sign = 0;
+                }
+#endif
+                e -= i;
+                dval(rv) *= tens[i];
+#ifdef VAX
+                /* VAX exponent range is so narrow we must
+                 * worry about overflow here...
+                 */
+vax_ovfl_check:
+                word0(rv) -= P*Exp_msk1;
+                /* rv = */ rounded_product(dval(rv), tens[e]);
+                if ((word0(rv) & Exp_mask)
+                    > Exp_msk1*(DBL_MAX_EXP+Bias-1-P)) {
+                    goto ovfl;
+                }
+                word0(rv) += P*Exp_msk1;
+#else
+                /* rv = */ rounded_product(dval(rv), tens[e]);
+#endif
+                goto ret;
+            }
+        }
+#ifndef Inaccurate_Divide
+        else if (e >= -Ten_pmax) {
+#ifdef Honor_FLT_ROUNDS
+            /* round correctly FLT_ROUNDS = 2 or 3 */
+            if (sign) {
+                rv = -rv;
+                sign = 0;
+            }
+#endif
+            /* rv = */ rounded_quotient(dval(rv), tens[-e]);
+            goto ret;
+        }
+#endif
+    }
+    e1 += nd - k;
+
+#ifdef IEEE_Arith
+#ifdef SET_INEXACT
+    inexact = 1;
+    if (k <= DBL_DIG) {
+        oldinexact = get_inexact();
+    }
+#endif
+#ifdef Avoid_Underflow
+    scale = 0;
+#endif
+#ifdef Honor_FLT_ROUNDS
+    if ((rounding = Flt_Rounds) >= 2) {
+        if (sign) {
+            rounding = rounding == 2 ? 0 : 2;
+        }
+        else if (rounding != 2) {
+            rounding = 0;
+        }
+    }
+#endif
+#endif /*IEEE_Arith*/
+
+    /* Get starting approximation = rv * 10**e1 */
+
+    if (e1 > 0) {
+        if (i = e1 & 15) {
+            dval(rv) *= tens[i];
+        }
+        if (e1 &= ~15) {
+            if (e1 > DBL_MAX_10_EXP) {
+ovfl:
+#ifndef NO_ERRNO
+                PR_SetError(PR_RANGE_ERROR, 0);
+#endif
+                /* Can't trust HUGE_VAL */
+#ifdef IEEE_Arith
+#ifdef Honor_FLT_ROUNDS
+                switch(rounding) {
+                    case 0: /* toward 0 */
+                    case 3: /* toward -infinity */
+                        word0(rv) = Big0;
+                        word1(rv) = Big1;
+                        break;
+                    default:
+                        word0(rv) = Exp_mask;
+                        word1(rv) = 0;
+                }
+#else /*Honor_FLT_ROUNDS*/
+                word0(rv) = Exp_mask;
+                word1(rv) = 0;
+#endif /*Honor_FLT_ROUNDS*/
+#ifdef SET_INEXACT
+                /* set overflow bit */
+                dval(rv0) = 1e300;
+                dval(rv0) *= dval(rv0);
+#endif
+#else /*IEEE_Arith*/
+                word0(rv) = Big0;
+                word1(rv) = Big1;
+#endif /*IEEE_Arith*/
+                if (bd0) {
+                    goto retfree;
+                }
+                goto ret;
+            }
+            e1 >>= 4;
+            for(j = 0; e1 > 1; j++, e1 >>= 1)
+                if (e1 & 1) {
+                    dval(rv) *= bigtens[j];
+                }
+            /* The last multiplication could overflow. */
+            word0(rv) -= P*Exp_msk1;
+            dval(rv) *= bigtens[j];
+            if ((z = word0(rv) & Exp_mask)
+                > Exp_msk1*(DBL_MAX_EXP+Bias-P)) {
+                goto ovfl;
+            }
+            if (z > Exp_msk1*(DBL_MAX_EXP+Bias-1-P)) {
+                /* set to largest number */
+                /* (Can't trust DBL_MAX) */
+                word0(rv) = Big0;
+                word1(rv) = Big1;
+            }
+            else {
+                word0(rv) += P*Exp_msk1;
+            }
+        }
+    }
+    else if (e1 < 0) {
+        e1 = -e1;
+        if (i = e1 & 15) {
+            dval(rv) /= tens[i];
+        }
+        if (e1 >>= 4) {
+            if (e1 >= 1 << n_bigtens) {
+                goto undfl;
+            }
+#ifdef Avoid_Underflow
+            if (e1 & Scale_Bit) {
+                scale = 2*P;
+            }
+            for(j = 0; e1 > 0; j++, e1 >>= 1)
+                if (e1 & 1) {
+                    dval(rv) *= tinytens[j];
+                }
+            if (scale && (j = 2*P + 1 - ((word0(rv) & Exp_mask)
+                                         >> Exp_shift)) > 0) {
+                /* scaled rv is denormal; zap j low bits */
+                if (j >= 32) {
+                    word1(rv) = 0;
+                    if (j >= 53) {
+                        word0(rv) = (P+2)*Exp_msk1;
+                    }
+                    else {
+                        word0(rv) &= 0xffffffff << j-32;
+                    }
+                }
+                else {
+                    word1(rv) &= 0xffffffff << j;
+                }
+            }
+#else
+            for(j = 0; e1 > 1; j++, e1 >>= 1)
+                if (e1 & 1) {
+                    dval(rv) *= tinytens[j];
+                }
+            /* The last multiplication could underflow. */
+            dval(rv0) = dval(rv);
+            dval(rv) *= tinytens[j];
+            if (!dval(rv)) {
+                dval(rv) = 2.*dval(rv0);
+                dval(rv) *= tinytens[j];
+#endif
+            if (!dval(rv)) {
+undfl:
+                dval(rv) = 0.;
+#ifndef NO_ERRNO
+                PR_SetError(PR_RANGE_ERROR, 0);
+#endif
+                if (bd0) {
+                    goto retfree;
+                }
+                goto ret;
+            }
+#ifndef Avoid_Underflow
+            word0(rv) = Tiny0;
+            word1(rv) = Tiny1;
+            /* The refinement below will clean
+             * this approximation up.
+             */
+        }
+#endif
+    }
+}
+
+/* Now the hard part -- adjusting rv to the correct value.*/
+
+/* Put digits into bd: true value = bd * 10^e */
+
+bd0 = s2b(s0, nd0, nd, y);
+
+for(;;) {
+    bd = Balloc(bd0->k);
+    Bcopy(bd, bd0);
+    bb = d2b(dval(rv), &bbe, &bbbits);  /* rv = bb * 2^bbe */
+    bs = i2b(1);
+
+    if (e >= 0) {
+        bb2 = bb5 = 0;
+        bd2 = bd5 = e;
+    }
+    else {
+        bb2 = bb5 = -e;
+        bd2 = bd5 = 0;
+    }
+    if (bbe >= 0) {
+        bb2 += bbe;
+    }
+    else {
+        bd2 -= bbe;
+    }
+    bs2 = bb2;
+#ifdef Honor_FLT_ROUNDS
+    if (rounding != 1) {
+        bs2++;
+    }
+#endif
+#ifdef Avoid_Underflow
+    j = bbe - scale;
+    i = j + bbbits - 1; /* logb(rv) */
+    if (i < Emin) { /* denormal */
+        j += P - Emin;
+    }
+    else {
+        j = P + 1 - bbbits;
+    }
+#else /*Avoid_Underflow*/
+#ifdef Sudden_Underflow
+#ifdef IBM
+    j = 1 + 4*P - 3 - bbbits + ((bbe + bbbits - 1) & 3);
+#else
+    j = P + 1 - bbbits;
+#endif
+#else /*Sudden_Underflow*/
+    j = bbe;
+    i = j + bbbits - 1; /* logb(rv) */
+    if (i < Emin) { /* denormal */
+        j += P - Emin;
+    }
+    else {
+        j = P + 1 - bbbits;
+    }
+#endif /*Sudden_Underflow*/
+#endif /*Avoid_Underflow*/
+    bb2 += j;
+    bd2 += j;
+#ifdef Avoid_Underflow
+    bd2 += scale;
+#endif
+    i = bb2 < bd2 ? bb2 : bd2;
+    if (i > bs2) {
+        i = bs2;
+    }
+    if (i > 0) {
+        bb2 -= i;
+        bd2 -= i;
+        bs2 -= i;
+    }
+    if (bb5 > 0) {
+        bs = pow5mult(bs, bb5);
+        bb1 = mult(bs, bb);
+        Bfree(bb);
+        bb = bb1;
+    }
+    if (bb2 > 0) {
+        bb = lshift(bb, bb2);
+    }
+    if (bd5 > 0) {
+        bd = pow5mult(bd, bd5);
+    }
+    if (bd2 > 0) {
+        bd = lshift(bd, bd2);
+    }
+    if (bs2 > 0) {
+        bs = lshift(bs, bs2);
+    }
+    delta = diff(bb, bd);
+    dsign = delta->sign;
+    delta->sign = 0;
+    i = cmp(delta, bs);
+#ifdef Honor_FLT_ROUNDS
+    if (rounding != 1) {
+        if (i < 0) {
+            /* Error is less than an ulp */
+            if (!delta->x[0] && delta->wds <= 1) {
+                /* exact */
+#ifdef SET_INEXACT
+                inexact = 0;
+#endif
+                break;
+            }
+            if (rounding) {
+                if (dsign) {
+                    adj = 1.;
+                    goto apply_adj;
+                }
+            }
+            else if (!dsign) {
+                adj = -1.;
+                if (!word1(rv)
+                    && !(word0(rv) & Frac_mask)) {
+                    y = word0(rv) & Exp_mask;
+#ifdef Avoid_Underflow
+                    if (!scale || y > 2*P*Exp_msk1)
+#else
+                    if (y)
+#endif
+                    {
+                        delta = lshift(delta,Log2P);
+                        if (cmp(delta, bs) <= 0) {
+                            adj = -0.5;
+                        }
+                    }
+                }
+apply_adj:
+#ifdef Avoid_Underflow
+                if (scale && (y = word0(rv) & Exp_mask)
+                    <= 2*P*Exp_msk1) {
+                    word0(adj) += (2*P+1)*Exp_msk1 - y;
+                }
+#else
+#ifdef Sudden_Underflow
+                if ((word0(rv) & Exp_mask) <=
+                    P*Exp_msk1) {
+                    word0(rv) += P*Exp_msk1;
+                    dval(rv) += adj*ulp(dval(rv));
+                    word0(rv) -= P*Exp_msk1;
+                }
+                else
+#endif /*Sudden_Underflow*/
+#endif /*Avoid_Underflow*/
+                dval(rv) += adj*ulp(dval(rv));
+            }
+            break;
+        }
+        adj = ratio(delta, bs);
+        if (adj < 1.) {
+            adj = 1.;
+        }
+        if (adj <= 0x7ffffffe) {
+            /* adj = rounding ? ceil(adj) : floor(adj); */
+            y = adj;
+            if (y != adj) {
+                if (!((rounding>>1) ^ dsign)) {
+                    y++;
+                }
+                adj = y;
+            }
+        }
+#ifdef Avoid_Underflow
+        if (scale && (y = word0(rv) & Exp_mask) <= 2*P*Exp_msk1) {
+            word0(adj) += (2*P+1)*Exp_msk1 - y;
+        }
+#else
+#ifdef Sudden_Underflow
+        if ((word0(rv) & Exp_mask) <= P*Exp_msk1) {
+            word0(rv) += P*Exp_msk1;
+            adj *= ulp(dval(rv));
+            if (dsign) {
+                dval(rv) += adj;
+            }
+            else {
+                dval(rv) -= adj;
+            }
+            word0(rv) -= P*Exp_msk1;
+            goto cont;
+        }
+#endif /*Sudden_Underflow*/
+#endif /*Avoid_Underflow*/
+        adj *= ulp(dval(rv));
+        if (dsign) {
+            dval(rv) += adj;
+        }
+        else {
+            dval(rv) -= adj;
+        }
+        goto cont;
+    }
+#endif /*Honor_FLT_ROUNDS*/
+
+    if (i < 0) {
+        /* Error is less than half an ulp -- check for
+         * special case of mantissa a power of two.
+         */
+        if (dsign || word1(rv) || word0(rv) & Bndry_mask
+#ifdef IEEE_Arith
+#ifdef Avoid_Underflow
+            || (word0(rv) & Exp_mask) <= (2*P+1)*Exp_msk1
+#else
+            || (word0(rv) & Exp_mask) <= Exp_msk1
+#endif
+#endif
+           ) {
+#ifdef SET_INEXACT
+            if (!delta->x[0] && delta->wds <= 1) {
+                inexact = 0;
+            }
+#endif
+            break;
+        }
+        if (!delta->x[0] && delta->wds <= 1) {
+            /* exact result */
+#ifdef SET_INEXACT
+            inexact = 0;
+#endif
+            break;
+        }
+        delta = lshift(delta,Log2P);
+        if (cmp(delta, bs) > 0) {
+            goto drop_down;
+        }
+        break;
+    }
+    if (i == 0) {
+        /* exactly half-way between */
+        if (dsign) {
+            if ((word0(rv) & Bndry_mask1) == Bndry_mask1
+                &&  word1(rv) == (
+#ifdef Avoid_Underflow
+                    (scale && (y = word0(rv) & Exp_mask) <= 2*P*Exp_msk1)
+                    ? (0xffffffff & (0xffffffff << (2*P+1-(y>>Exp_shift)))) :
+#endif
+                    0xffffffff)) {
+                /*boundary case -- increment exponent*/
+                word0(rv) = (word0(rv) & Exp_mask)
+                            + Exp_msk1
+#ifdef IBM
+                            | Exp_msk1 >> 4
+#endif
+                            ;
+                word1(rv) = 0;
+#ifdef Avoid_Underflow
+                dsign = 0;
+#endif
+                break;
+            }
+        }
+        else if (!(word0(rv) & Bndry_mask) && !word1(rv)) {
+drop_down:
+            /* boundary case -- decrement exponent */
+#ifdef Sudden_Underflow /*{{*/
+            L = word0(rv) & Exp_mask;
+#ifdef IBM
+            if (L <  Exp_msk1)
+#else
+#ifdef Avoid_Underflow
+            if (L <= (scale ? (2*P+1)*Exp_msk1 : Exp_msk1))
+#else
+            if (L <= Exp_msk1)
+#endif /*Avoid_Underflow*/
+#endif /*IBM*/
+                goto undfl;
+            L -= Exp_msk1;
+#else /*Sudden_Underflow}{*/
+#ifdef Avoid_Underflow
+            if (scale) {
+                L = word0(rv) & Exp_mask;
+                if (L <= (2*P+1)*Exp_msk1) {
+                    if (L > (P+2)*Exp_msk1)
+                        /* round even ==> */
+                        /* accept rv */
+                    {
+                        break;
+                    }
+                    /* rv = smallest denormal */
+                    goto undfl;
+                }
+            }
+#endif /*Avoid_Underflow*/
+            L = (word0(rv) & Exp_mask) - Exp_msk1;
+#endif /*Sudden_Underflow}}*/
+            word0(rv) = L | Bndry_mask1;
+            word1(rv) = 0xffffffff;
+#ifdef IBM
+            goto cont;
+#else
+            break;
+#endif
+        }
+#ifndef ROUND_BIASED
+        if (!(word1(rv) & LSB)) {
+            break;
+        }
+#endif
+        if (dsign) {
+            dval(rv) += ulp(dval(rv));
+        }
+#ifndef ROUND_BIASED
+        else {
+            dval(rv) -= ulp(dval(rv));
+#ifndef Sudden_Underflow
+            if (!dval(rv)) {
+                goto undfl;
+            }
+#endif
+        }
+#ifdef Avoid_Underflow
+        dsign = 1 - dsign;
+#endif
+#endif
+        break;
+    }
+    if ((aadj = ratio(delta, bs)) <= 2.) {
+        if (dsign) {
+            aadj = aadj1 = 1.;
+        }
+        else if (word1(rv) || word0(rv) & Bndry_mask) {
+#ifndef Sudden_Underflow
+            if (word1(rv) == Tiny1 && !word0(rv)) {
+                goto undfl;
+            }
+#endif
+            aadj = 1.;
+            aadj1 = -1.;
+        }
+        else {
+            /* special case -- power of FLT_RADIX to be */
+            /* rounded down... */
+
+            if (aadj < 2./FLT_RADIX) {
+                aadj = 1./FLT_RADIX;
+            }
+            else {
+                aadj *= 0.5;
+            }
+            aadj1 = -aadj;
+        }
+    }
+    else {
+        aadj *= 0.5;
+        aadj1 = dsign ? aadj : -aadj;
+#ifdef Check_FLT_ROUNDS
+        switch(Rounding) {
+            case 2: /* towards +infinity */
+                aadj1 -= 0.5;
+                break;
+            case 0: /* towards 0 */
+            case 3: /* towards -infinity */
+                aadj1 += 0.5;
+        }
+#else
+        if (Flt_Rounds == 0) {
+            aadj1 += 0.5;
+        }
+#endif /*Check_FLT_ROUNDS*/
+    }
+    y = word0(rv) & Exp_mask;
+
+    /* Check for overflow */
+
+    if (y == Exp_msk1*(DBL_MAX_EXP+Bias-1)) {
+        dval(rv0) = dval(rv);
+        word0(rv) -= P*Exp_msk1;
+        adj = aadj1 * ulp(dval(rv));
+        dval(rv) += adj;
+        if ((word0(rv) & Exp_mask) >=
+            Exp_msk1*(DBL_MAX_EXP+Bias-P)) {
+            if (word0(rv0) == Big0 && word1(rv0) == Big1) {
+                goto ovfl;
+            }
+            word0(rv) = Big0;
+            word1(rv) = Big1;
+            goto cont;
+        }
+        else {
+            word0(rv) += P*Exp_msk1;
+        }
+    }
+    else {
+#ifdef Avoid_Underflow
+        if (scale && y <= 2*P*Exp_msk1) {
+            if (aadj <= 0x7fffffff) {
+                if ((z = aadj) <= 0) {
+                    z = 1;
+                }
+                aadj = z;
+                aadj1 = dsign ? aadj : -aadj;
+            }
+            dval(aadj2) = aadj1;
+            word0(aadj2) += (2*P+1)*Exp_msk1 - y;
+            aadj1 = dval(aadj2);
+        }
+        adj = aadj1 * ulp(dval(rv));
+        dval(rv) += adj;
+#else
+#ifdef Sudden_Underflow
+        if ((word0(rv) & Exp_mask) <= P*Exp_msk1) {
+            dval(rv0) = dval(rv);
+            word0(rv) += P*Exp_msk1;
+            adj = aadj1 * ulp(dval(rv));
+            dval(rv) += adj;
+#ifdef IBM
+            if ((word0(rv) & Exp_mask) <  P*Exp_msk1)
+#else
+            if ((word0(rv) & Exp_mask) <= P*Exp_msk1)
+#endif
+            {
+                if (word0(rv0) == Tiny0
+                    && word1(rv0) == Tiny1) {
+                    goto undfl;
+                }
+                word0(rv) = Tiny0;
+                word1(rv) = Tiny1;
+                goto cont;
+            }
+            else {
+                word0(rv) -= P*Exp_msk1;
+            }
+        }
+        else {
+            adj = aadj1 * ulp(dval(rv));
+            dval(rv) += adj;
+        }
+#else /*Sudden_Underflow*/
+        /* Compute adj so that the IEEE rounding rules will
+         * correctly round rv + adj in some half-way cases.
+         * If rv * ulp(rv) is denormalized (i.e.,
+         * y <= (P-1)*Exp_msk1), we must adjust aadj to avoid
+         * trouble from bits lost to denormalization;
+         * example: 1.2e-307 .
+         */
+        if (y <= (P-1)*Exp_msk1 && aadj > 1.) {
+            aadj1 = (double)(int)(aadj + 0.5);
+            if (!dsign) {
+                aadj1 = -aadj1;
+            }
+        }
+        adj = aadj1 * ulp(dval(rv));
+        dval(rv) += adj;
+#endif /*Sudden_Underflow*/
+#endif /*Avoid_Underflow*/
+    }
+    z = word0(rv) & Exp_mask;
+#ifndef SET_INEXACT
+#ifdef Avoid_Underflow
+    if (!scale)
+#endif
+        if (y == z) {
+            /* Can we stop now? */
+            L = (Long)aadj;
+            aadj -= L;
+            /* The tolerances below are conservative. */
+            if (dsign || word1(rv) || word0(rv) & Bndry_mask) {
+                if (aadj < .4999999 || aadj > .5000001) {
+                    break;
+                }
+            }
+            else if (aadj < .4999999/FLT_RADIX) {
+                break;
+            }
+        }
+#endif
+cont:
+    Bfree(bb);
+    Bfree(bd);
+    Bfree(bs);
+    Bfree(delta);
+}
+#ifdef SET_INEXACT
+if (inexact) {
+    if (!oldinexact) {
+        word0(rv0) = Exp_1 + (70 << Exp_shift);
+        word1(rv0) = 0;
+        dval(rv0) += 1.;
+    }
+}
+else if (!oldinexact) {
+    clear_inexact();
+}
+#endif
+#ifdef Avoid_Underflow
+if (scale) {
+    word0(rv0) = Exp_1 - 2*P*Exp_msk1;
+    word1(rv0) = 0;
+    dval(rv) *= dval(rv0);
+#ifndef NO_ERRNO
+    /* try to avoid the bug of testing an 8087 register value */
+    if (word0(rv) == 0 && word1(rv) == 0) {
+        PR_SetError(PR_RANGE_ERROR, 0);
+    }
+#endif
+}
+#endif /* Avoid_Underflow */
+#ifdef SET_INEXACT
+if (inexact && !(word0(rv) & Exp_mask)) {
+    /* set underflow bit */
+    dval(rv0) = 1e-300;
+    dval(rv0) *= dval(rv0);
+}
+#endif
+retfree:
+Bfree(bb);
+Bfree(bd);
+Bfree(bs);
+Bfree(bd0);
+Bfree(delta);
+ret:
+if (se) {
+    *se = (char *)s;
+}
+return sign ? -dval(rv) : dval(rv);
+}
+
+static int
+quorem
+#ifdef KR_headers
+(b, S) Bigint *b, *S;
+#else
+(Bigint *b, Bigint *S)
+#endif
+{
+    int n;
+    ULong *bx, *bxe, q, *sx, *sxe;
+#ifdef ULLong
+    ULLong borrow, carry, y, ys;
+#else
+    ULong borrow, carry, y, ys;
+#ifdef Pack_32
+    ULong si, z, zs;
+#endif
+#endif
+
+    n = S->wds;
+#ifdef DEBUG
+    /*debug*/ if (b->wds > n)
+        /*debug*/{
+        Bug("oversize b in quorem");
+    }
+#endif
+    if (b->wds < n) {
+        return 0;
+    }
+    sx = S->x;
+    sxe = sx + --n;
+    bx = b->x;
+    bxe = bx + n;
+    q = *bxe / (*sxe + 1);  /* ensure q <= true quotient */
+#ifdef DEBUG
+    /*debug*/ if (q > 9)
+        /*debug*/{
+        Bug("oversized quotient in quorem");
+    }
+#endif
+    if (q) {
+        borrow = 0;
+        carry = 0;
+        do {
+#ifdef ULLong
+            ys = *sx++ * (ULLong)q + carry;
+            carry = ys >> 32;
+            y = *bx - (ys & FFFFFFFF) - borrow;
+            borrow = y >> 32 & (ULong)1;
+            *bx++ = y & FFFFFFFF;
+#else
+#ifdef Pack_32
+            si = *sx++;
+            ys = (si & 0xffff) * q + carry;
+            zs = (si >> 16) * q + (ys >> 16);
+            carry = zs >> 16;
+            y = (*bx & 0xffff) - (ys & 0xffff) - borrow;
+            borrow = (y & 0x10000) >> 16;
+            z = (*bx >> 16) - (zs & 0xffff) - borrow;
+            borrow = (z & 0x10000) >> 16;
+            Storeinc(bx, z, y);
+#else
+            ys = *sx++ * q + carry;
+            carry = ys >> 16;
+            y = *bx - (ys & 0xffff) - borrow;
+            borrow = (y & 0x10000) >> 16;
+            *bx++ = y & 0xffff;
+#endif
+#endif
+        }
+        while(sx <= sxe);
+        if (!*bxe) {
+            bx = b->x;
+            while(--bxe > bx && !*bxe) {
+                --n;
+            }
+            b->wds = n;
+        }
+    }
+    if (cmp(b, S) >= 0) {
+        q++;
+        borrow = 0;
+        carry = 0;
+        bx = b->x;
+        sx = S->x;
+        do {
+#ifdef ULLong
+            ys = *sx++ + carry;
+            carry = ys >> 32;
+            y = *bx - (ys & FFFFFFFF) - borrow;
+            borrow = y >> 32 & (ULong)1;
+            *bx++ = y & FFFFFFFF;
+#else
+#ifdef Pack_32
+            si = *sx++;
+            ys = (si & 0xffff) + carry;
+            zs = (si >> 16) + (ys >> 16);
+            carry = zs >> 16;
+            y = (*bx & 0xffff) - (ys & 0xffff) - borrow;
+            borrow = (y & 0x10000) >> 16;
+            z = (*bx >> 16) - (zs & 0xffff) - borrow;
+            borrow = (z & 0x10000) >> 16;
+            Storeinc(bx, z, y);
+#else
+            ys = *sx++ + carry;
+            carry = ys >> 16;
+            y = *bx - (ys & 0xffff) - borrow;
+            borrow = (y & 0x10000) >> 16;
+            *bx++ = y & 0xffff;
+#endif
+#endif
+        }
+        while(sx <= sxe);
+        bx = b->x;
+        bxe = bx + n;
+        if (!*bxe) {
+            while(--bxe > bx && !*bxe) {
+                --n;
+            }
+            b->wds = n;
+        }
+    }
+    return q;
+}
+
+#ifndef MULTIPLE_THREADS
+static char *dtoa_result;
+#endif
+
+static char *
+#ifdef KR_headers
+rv_alloc(i) int i;
+#else
+rv_alloc(int i)
+#endif
+{
+    int j, k, *r;
+
+    j = sizeof(ULong);
+    for(k = 0;
+        sizeof(Bigint) - sizeof(ULong) - sizeof(int) + j <= i;
+        j <<= 1) {
+        k++;
+    }
+    r = (int*)Balloc(k);
+    *r = k;
+    return
+#ifndef MULTIPLE_THREADS
+        dtoa_result =
+#endif
+            (char *)(r+1);
+}
+
+static char *
+#ifdef KR_headers
+nrv_alloc(s, rve, n) char *s, **rve; int n;
+#else
+nrv_alloc(char *s, char **rve, int n)
+#endif
+{
+    char *rv, *t;
+
+    t = rv = rv_alloc(n);
+    while(*t = *s++) {
+        t++;
+    }
+    if (rve) {
+        *rve = t;
+    }
+    return rv;
+}
+
+/* freedtoa(s) must be used to free values s returned by dtoa
+ * when MULTIPLE_THREADS is #defined.  It should be used in all cases,
+ * but for consistency with earlier versions of dtoa, it is optional
+ * when MULTIPLE_THREADS is not defined.
+ */
+
+static void
+#ifdef KR_headers
+freedtoa(s) char *s;
+#else
+freedtoa(char *s)
+#endif
+{
+    Bigint *b = (Bigint *)((int *)s - 1);
+    b->maxwds = 1 << (b->k = *(int*)b);
+    Bfree(b);
+#ifndef MULTIPLE_THREADS
+    if (s == dtoa_result) {
+        dtoa_result = 0;
+    }
+#endif
+}
+
+/* dtoa for IEEE arithmetic (dmg): convert double to ASCII string.
+ *
+ * Inspired by "How to Print Floating-Point Numbers Accurately" by
+ * Guy L. Steele, Jr. and Jon L. White [Proc. ACM SIGPLAN '90, pp. 112-126].
+ *
+ * Modifications:
+ *  1. Rather than iterating, we use a simple numeric overestimate
+ *     to determine k = floor(log10(d)).  We scale relevant
+ *     quantities using O(log2(k)) rather than O(k) multiplications.
+ *  2. For some modes > 2 (corresponding to ecvt and fcvt), we don't
+ *     try to generate digits strictly left to right.  Instead, we
+ *     compute with fewer bits and propagate the carry if necessary
+ *     when rounding the final digit up.  This is often faster.
+ *  3. Under the assumption that input will be rounded nearest,
+ *     mode 0 renders 1e23 as 1e23 rather than 9.999999999999999e22.
+ *     That is, we allow equality in stopping tests when the
+ *     round-nearest rule will give the same floating-point value
+ *     as would satisfaction of the stopping test with strict
+ *     inequality.
+ *  4. We remove common factors of powers of 2 from relevant
+ *     quantities.
+ *  5. When converting floating-point integers less than 1e16,
+ *     we use floating-point arithmetic rather than resorting
+ *     to multiple-precision integers.
+ *  6. When asked to produce fewer than 15 digits, we first try
+ *     to get by with floating-point arithmetic; we resort to
+ *     multiple-precision integer arithmetic only if we cannot
+ *     guarantee that the floating-point calculation has given
+ *     the correctly rounded result.  For k requested digits and
+ *     "uniformly" distributed input, the probability is
+ *     something like 10^(k-15) that we must resort to the Long
+ *     calculation.
+ */
+
+static char *
+dtoa
+#ifdef KR_headers
+(dd, mode, ndigits, decpt, sign, rve)
+double dd; int mode, ndigits, *decpt, *sign; char **rve;
+#else
+(double dd, int mode, int ndigits, int *decpt, int *sign, char **rve)
+#endif
+{
+    /* Arguments ndigits, decpt, sign are similar to those
+    of ecvt and fcvt; trailing zeros are suppressed from
+    the returned string.  If not null, *rve is set to point
+    to the end of the return value.  If d is +-Infinity or NaN,
+    then *decpt is set to 9999.
+
+    mode:
+       0 ==> shortest string that yields d when read in
+           and rounded to nearest.
+       1 ==> like 0, but with Steele & White stopping rule;
+           e.g. with IEEE P754 arithmetic , mode 0 gives
+           1e23 whereas mode 1 gives 9.999999999999999e22.
+       2 ==> max(1,ndigits) significant digits.  This gives a
+           return value similar to that of ecvt, except
+           that trailing zeros are suppressed.
+       3 ==> through ndigits past the decimal point.  This
+           gives a return value similar to that from fcvt,
+           except that trailing zeros are suppressed, and
+           ndigits can be negative.
+       4,5 ==> similar to 2 and 3, respectively, but (in
+           round-nearest mode) with the tests of mode 0 to
+           possibly return a shorter string that rounds to d.
+           With IEEE arithmetic and compilation with
+           -DHonor_FLT_ROUNDS, modes 4 and 5 behave the same
+           as modes 2 and 3 when FLT_ROUNDS != 1.
+       6-9 ==> Debugging modes similar to mode - 4:  don't try
+           fast floating-point estimate (if applicable).
+
+       Values of mode other than 0-9 are treated as mode 0.
+
+       Sufficient space is allocated to the return value
+       to hold the suppressed trailing zeros.
+    */
+
+    int bbits, b2, b5, be, dig, i, ieps, ilim, ilim0, ilim1,
+        j, j1, k, k0, k_check, leftright, m2, m5, s2, s5,
+        spec_case, try_quick;
+    Long L;
+#ifndef Sudden_Underflow
+    int denorm;
+    ULong x;
+#endif
+    Bigint *b, *b1, *delta, *mlo, *mhi, *S;
+    U d, d2, eps;
+    double ds;
+    char *s, *s0;
+#ifdef Honor_FLT_ROUNDS
+    int rounding;
+#endif
+#ifdef SET_INEXACT
+    int inexact, oldinexact;
+#endif
+
+#ifndef MULTIPLE_THREADS
+    if (dtoa_result) {
+        freedtoa(dtoa_result);
+        dtoa_result = 0;
+    }
+#endif
+
+    dval(d) = dd;
+    if (word0(d) & Sign_bit) {
+        /* set sign for everything, including 0's and NaNs */
+        *sign = 1;
+        word0(d) &= ~Sign_bit;  /* clear sign bit */
+    }
+    else {
+        *sign = 0;
+    }
+
+#if defined(IEEE_Arith) + defined(VAX)
+#ifdef IEEE_Arith
+    if ((word0(d) & Exp_mask) == Exp_mask)
+#else
+    if (word0(d)  == 0x8000)
+#endif
+    {
+        /* Infinity or NaN */
+        *decpt = 9999;
+#ifdef IEEE_Arith
+        if (!word1(d) && !(word0(d) & 0xfffff)) {
+            return nrv_alloc("Infinity", rve, 8);
+        }
+#endif
+        return nrv_alloc("NaN", rve, 3);
+    }
+#endif
+#ifdef IBM
+    dval(d) += 0; /* normalize */
+#endif
+    if (!dval(d)) {
+        *decpt = 1;
+        return nrv_alloc("0", rve, 1);
+    }
+
+#ifdef SET_INEXACT
+    try_quick = oldinexact = get_inexact();
+    inexact = 1;
+#endif
+#ifdef Honor_FLT_ROUNDS
+    if ((rounding = Flt_Rounds) >= 2) {
+        if (*sign) {
+            rounding = rounding == 2 ? 0 : 2;
+        }
+        else if (rounding != 2) {
+            rounding = 0;
+        }
+    }
+#endif
+
+    b = d2b(dval(d), &be, &bbits);
+#ifdef Sudden_Underflow
+    i = (int)(word0(d) >> Exp_shift1 & (Exp_mask>>Exp_shift1));
+#else
+    if (i = (int)(word0(d) >> Exp_shift1 & (Exp_mask>>Exp_shift1))) {
+#endif
+    dval(d2) = dval(d);
+    word0(d2) &= Frac_mask1;
+    word0(d2) |= Exp_11;
+#ifdef IBM
+    if (j = 11 - hi0bits(word0(d2) & Frac_mask)) {
+        dval(d2) /= 1 << j;
+    }
+#endif
+
+    /* log(x)   ~=~ log(1.5) + (x-1.5)/1.5
+     * log10(x)  =  log(x) / log(10)
+     *      ~=~ log(1.5)/log(10) + (x-1.5)/(1.5*log(10))
+     * log10(d) = (i-Bias)*log(2)/log(10) + log10(d2)
+     *
+     * This suggests computing an approximation k to log10(d) by
+     *
+     * k = (i - Bias)*0.301029995663981
+     *  + ( (d2-1.5)*0.289529654602168 + 0.176091259055681 );
+     *
+     * We want k to be too large rather than too small.
+     * The error in the first-order Taylor series approximation
+     * is in our favor, so we just round up the constant enough
+     * to compensate for any error in the multiplication of
+     * (i - Bias) by 0.301029995663981; since |i - Bias| <= 1077,
+     * and 1077 * 0.30103 * 2^-52 ~=~ 7.2e-14,
+     * adding 1e-13 to the constant term more than suffices.
+     * Hence we adjust the constant term to 0.1760912590558.
+     * (We could get a more accurate k by invoking log10,
+     *  but this is probably not worthwhile.)
+     */
+
+    i -= Bias;
+#ifdef IBM
+    i <<= 2;
+    i += j;
+#endif
+#ifndef Sudden_Underflow
+    denorm = 0;
+}
+else {
+    /* d is denormalized */
+
+    i = bbits + be + (Bias + (P-1) - 1);
+    x = i > 32  ? word0(d) << 64 - i | word1(d) >> i - 32
+        : word1(d) << 32 - i;
+    dval(d2) = x;
+    word0(d2) -= 31*Exp_msk1; /* adjust exponent */
+    i -= (Bias + (P-1) - 1) + 1;
+    denorm = 1;
+}
+#endif
+ds = (dval(d2)-1.5)*0.289529654602168 + 0.1760912590558 + i*0.301029995663981;
+k = (int)ds;
+if (ds < 0. && ds != k) {
+    k--;    /* want k = floor(ds) */
+}
+k_check = 1;
+if (k >= 0 && k <= Ten_pmax) {
+    if (dval(d) < tens[k]) {
+        k--;
+    }
+    k_check = 0;
+}
+j = bbits - i - 1;
+if (j >= 0) {
+    b2 = 0;
+    s2 = j;
+}
+else {
+    b2 = -j;
+    s2 = 0;
+}
+if (k >= 0) {
+    b5 = 0;
+    s5 = k;
+    s2 += k;
+}
+else {
+    b2 -= k;
+    b5 = -k;
+    s5 = 0;
+}
+if (mode < 0 || mode > 9) {
+    mode = 0;
+}
+
+#ifndef SET_INEXACT
+#ifdef Check_FLT_ROUNDS
+try_quick = Rounding == 1;
+#else
+try_quick = 1;
+#endif
+#endif /*SET_INEXACT*/
+
+if (mode > 5) {
+    mode -= 4;
+    try_quick = 0;
+}
+leftright = 1;
+switch(mode) {
+case 0:
+case 1:
+    ilim = ilim1 = -1;
+    i = 18;
+    ndigits = 0;
+    break;
+case 2:
+    leftright = 0;
+/* no break */
+case 4:
+    if (ndigits <= 0) {
+        ndigits = 1;
+    }
+    ilim = ilim1 = i = ndigits;
+    break;
+case 3:
+    leftright = 0;
+/* no break */
+case 5:
+    i = ndigits + k + 1;
+    ilim = i;
+    ilim1 = i - 1;
+    if (i <= 0) {
+        i = 1;
+    }
+}
+s = s0 = rv_alloc(i);
+
+#ifdef Honor_FLT_ROUNDS
+if (mode > 1 && rounding != 1) {
+    leftright = 0;
+}
+#endif
+
+if (ilim >= 0 && ilim <= Quick_max && try_quick) {
+
+    /* Try to get by with floating-point arithmetic. */
+
+    i = 0;
+    dval(d2) = dval(d);
+    k0 = k;
+    ilim0 = ilim;
+    ieps = 2; /* conservative */
+    if (k > 0) {
+        ds = tens[k&0xf];
+        j = k >> 4;
+        if (j & Bletch) {
+            /* prevent overflows */
+            j &= Bletch - 1;
+            dval(d) /= bigtens[n_bigtens-1];
+            ieps++;
+        }
+        for(; j; j >>= 1, i++)
+            if (j & 1) {
+                ieps++;
+                ds *= bigtens[i];
+            }
+        dval(d) /= ds;
+    }
+    else if (j1 = -k) {
+        dval(d) *= tens[j1 & 0xf];
+        for(j = j1 >> 4; j; j >>= 1, i++)
+            if (j & 1) {
+                ieps++;
+                dval(d) *= bigtens[i];
+            }
+    }
+    if (k_check && dval(d) < 1. && ilim > 0) {
+        if (ilim1 <= 0) {
+            goto fast_failed;
+        }
+        ilim = ilim1;
+        k--;
+        dval(d) *= 10.;
+        ieps++;
+    }
+    dval(eps) = ieps*dval(d) + 7.;
+    word0(eps) -= (P-1)*Exp_msk1;
+    if (ilim == 0) {
+        S = mhi = 0;
+        dval(d) -= 5.;
+        if (dval(d) > dval(eps)) {
+            goto one_digit;
+        }
+        if (dval(d) < -dval(eps)) {
+            goto no_digits;
+        }
+        goto fast_failed;
+    }
+#ifndef No_leftright
+    if (leftright) {
+        /* Use Steele & White method of only
+         * generating digits needed.
+         */
+        dval(eps) = 0.5/tens[ilim-1] - dval(eps);
+        for(i = 0;;) {
+            L = dval(d);
+            dval(d) -= L;
+            *s++ = '0' + (int)L;
+            if (dval(d) < dval(eps)) {
+                goto ret1;
+            }
+            if (1. - dval(d) < dval(eps)) {
+                goto bump_up;
+            }
+            if (++i >= ilim) {
+                break;
+            }
+            dval(eps) *= 10.;
+            dval(d) *= 10.;
+        }
+    }
+    else {
+#endif
+        /* Generate ilim digits, then fix them up. */
+        dval(eps) *= tens[ilim-1];
+        for(i = 1;; i++, dval(d) *= 10.) {
+            L = (Long)(dval(d));
+            if (!(dval(d) -= L)) {
+                ilim = i;
+            }
+            *s++ = '0' + (int)L;
+            if (i == ilim) {
+                if (dval(d) > 0.5 + dval(eps)) {
+                    goto bump_up;
+                }
+                else if (dval(d) < 0.5 - dval(eps)) {
+                    while(*--s == '0');
+                    s++;
+                    goto ret1;
+                }
+                break;
+            }
+        }
+#ifndef No_leftright
+    }
+#endif
+fast_failed:
+    s = s0;
+    dval(d) = dval(d2);
+    k = k0;
+    ilim = ilim0;
+}
+
+/* Do we have a "small" integer? */
+
+if (be >= 0 && k <= Int_max) {
+    /* Yes. */
+    ds = tens[k];
+    if (ndigits < 0 && ilim <= 0) {
+        S = mhi = 0;
+        if (ilim < 0 || dval(d) <= 5*ds) {
+            goto no_digits;
+        }
+        goto one_digit;
+    }
+    for(i = 1; i <= k+1; i++, dval(d) *= 10.) {
+        L = (Long)(dval(d) / ds);
+        dval(d) -= L*ds;
+#ifdef Check_FLT_ROUNDS
+        /* If FLT_ROUNDS == 2, L will usually be high by 1 */
+        if (dval(d) < 0) {
+            L--;
+            dval(d) += ds;
+        }
+#endif
+        *s++ = '0' + (int)L;
+        if (!dval(d)) {
+#ifdef SET_INEXACT
+            inexact = 0;
+#endif
+            break;
+        }
+        if (i == ilim) {
+#ifdef Honor_FLT_ROUNDS
+            if (mode > 1)
+                switch(rounding) {
+                    case 0: goto ret1;
+                    case 2: goto bump_up;
+                }
+#endif
+            dval(d) += dval(d);
+            if (dval(d) > ds || dval(d) == ds && L & 1) {
+bump_up:
+                while(*--s == '9')
+                    if (s == s0) {
+                        k++;
+                        *s = '0';
+                        break;
+                    }
+                ++*s++;
+            }
+            break;
+        }
+    }
+    goto ret1;
+}
+
+m2 = b2;
+m5 = b5;
+mhi = mlo = 0;
+if (leftright) {
+    i =
+#ifndef Sudden_Underflow
+        denorm ? be + (Bias + (P-1) - 1 + 1) :
+#endif
+#ifdef IBM
+        1 + 4*P - 3 - bbits + ((bbits + be - 1) & 3);
+#else
+        1 + P - bbits;
+#endif
+    b2 += i;
+    s2 += i;
+    mhi = i2b(1);
+}
+if (m2 > 0 && s2 > 0) {
+    i = m2 < s2 ? m2 : s2;
+    b2 -= i;
+    m2 -= i;
+    s2 -= i;
+}
+if (b5 > 0) {
+    if (leftright) {
+        if (m5 > 0) {
+            mhi = pow5mult(mhi, m5);
+            b1 = mult(mhi, b);
+            Bfree(b);
+            b = b1;
+        }
+        if (j = b5 - m5) {
+            b = pow5mult(b, j);
+        }
+    }
+    else {
+        b = pow5mult(b, b5);
+    }
+}
+S = i2b(1);
+if (s5 > 0) {
+    S = pow5mult(S, s5);
+}
+
+/* Check for special case that d is a normalized power of 2. */
+
+spec_case = 0;
+if ((mode < 2 || leftright)
+#ifdef Honor_FLT_ROUNDS
+    && rounding == 1
+#endif
+   ) {
+    if (!word1(d) && !(word0(d) & Bndry_mask)
+#ifndef Sudden_Underflow
+        && word0(d) & (Exp_mask & ~Exp_msk1)
+#endif
+       ) {
+        /* The special case */
+        b2 += Log2P;
+        s2 += Log2P;
+        spec_case = 1;
+    }
+}
+
+/* Arrange for convenient computation of quotients:
+ * shift left if necessary so divisor has 4 leading 0 bits.
+ *
+ * Perhaps we should just compute leading 28 bits of S once
+ * and for all and pass them and a shift to quorem, so it
+ * can do shifts and ors to compute the numerator for q.
+ */
+#ifdef Pack_32
+if (i = ((s5 ? 32 - hi0bits(S->x[S->wds-1]) : 1) + s2) & 0x1f) {
+    i = 32 - i;
+}
+#else
+if (i = ((s5 ? 32 - hi0bits(S->x[S->wds-1]) : 1) + s2) & 0xf) {
+    i = 16 - i;
+}
+#endif
+if (i > 4) {
+    i -= 4;
+    b2 += i;
+    m2 += i;
+    s2 += i;
+}
+else if (i < 4) {
+    i += 28;
+    b2 += i;
+    m2 += i;
+    s2 += i;
+}
+if (b2 > 0) {
+    b = lshift(b, b2);
+}
+if (s2 > 0) {
+    S = lshift(S, s2);
+}
+if (k_check) {
+    if (cmp(b,S) < 0) {
+        k--;
+        b = multadd(b, 10, 0);  /* we botched the k estimate */
+        if (leftright) {
+            mhi = multadd(mhi, 10, 0);
+        }
+        ilim = ilim1;
+    }
+}
+if (ilim <= 0 && (mode == 3 || mode == 5)) {
+    if (ilim < 0 || cmp(b,S = multadd(S,5,0)) <= 0) {
+        /* no digits, fcvt style */
+no_digits:
+        k = -1 - ndigits;
+        goto ret;
+    }
+one_digit:
+    *s++ = '1';
+    k++;
+    goto ret;
+}
+if (leftright) {
+    if (m2 > 0) {
+        mhi = lshift(mhi, m2);
+    }
+
+    /* Compute mlo -- check for special case
+     * that d is a normalized power of 2.
+     */
+
+    mlo = mhi;
+    if (spec_case) {
+        mhi = Balloc(mhi->k);
+        Bcopy(mhi, mlo);
+        mhi = lshift(mhi, Log2P);
+    }
+
+    for(i = 1;; i++) {
+        dig = quorem(b,S) + '0';
+        /* Do we yet have the shortest decimal string
+         * that will round to d?
+         */
+        j = cmp(b, mlo);
+        delta = diff(S, mhi);
+        j1 = delta->sign ? 1 : cmp(b, delta);
+        Bfree(delta);
+#ifndef ROUND_BIASED
+        if (j1 == 0 && mode != 1 && !(word1(d) & 1)
+#ifdef Honor_FLT_ROUNDS
+            && rounding >= 1
+#endif
+           ) {
+            if (dig == '9') {
+                goto round_9_up;
+            }
+            if (j > 0) {
+                dig++;
+            }
+#ifdef SET_INEXACT
+            else if (!b->x[0] && b->wds <= 1) {
+                inexact = 0;
+            }
+#endif
+            *s++ = dig;
+            goto ret;
+        }
+#endif
+        if (j < 0 || j == 0 && mode != 1
+#ifndef ROUND_BIASED
+            && !(word1(d) & 1)
+#endif
+           ) {
+            if (!b->x[0] && b->wds <= 1) {
+#ifdef SET_INEXACT
+                inexact = 0;
+#endif
+                goto accept_dig;
+            }
+#ifdef Honor_FLT_ROUNDS
+            if (mode > 1)
+                switch(rounding) {
+                    case 0: goto accept_dig;
+                    case 2: goto keep_dig;
+                }
+#endif /*Honor_FLT_ROUNDS*/
+            if (j1 > 0) {
+                b = lshift(b, 1);
+                j1 = cmp(b, S);
+                if ((j1 > 0 || j1 == 0 && dig & 1)
+                    && dig++ == '9') {
+                    goto round_9_up;
+                }
+            }
+accept_dig:
+            *s++ = dig;
+            goto ret;
+        }
+        if (j1 > 0) {
+#ifdef Honor_FLT_ROUNDS
+            if (!rounding) {
+                goto accept_dig;
+            }
+#endif
+            if (dig == '9') { /* possible if i == 1 */
+round_9_up:
+                *s++ = '9';
+                goto roundoff;
+            }
+            *s++ = dig + 1;
+            goto ret;
+        }
+#ifdef Honor_FLT_ROUNDS
+keep_dig:
+#endif
+        *s++ = dig;
+        if (i == ilim) {
+            break;
+        }
+        b = multadd(b, 10, 0);
+        if (mlo == mhi) {
+            mlo = mhi = multadd(mhi, 10, 0);
+        }
+        else {
+            mlo = multadd(mlo, 10, 0);
+            mhi = multadd(mhi, 10, 0);
+        }
+    }
+}
+else
+    for(i = 1;; i++) {
+        *s++ = dig = quorem(b,S) + '0';
+        if (!b->x[0] && b->wds <= 1) {
+#ifdef SET_INEXACT
+            inexact = 0;
+#endif
+            goto ret;
+        }
+        if (i >= ilim) {
+            break;
+        }
+        b = multadd(b, 10, 0);
+    }
+
+/* Round off last digit */
+
+#ifdef Honor_FLT_ROUNDS
+switch(rounding) {
+case 0: goto trimzeros;
+case 2: goto roundoff;
+}
+#endif
+b = lshift(b, 1);
+j = cmp(b, S);
+if (j > 0 || j == 0 && dig & 1) {
+roundoff:
+    while(*--s == '9')
+        if (s == s0) {
+            k++;
+            *s++ = '1';
+            goto ret;
+        }
+    ++*s++;
+}
+else {
+#ifdef Honor_FLT_ROUNDS
+trimzeros:
+#endif
+    while(*--s == '0');
+    s++;
+}
+ret:
+Bfree(S);
+if (mhi) {
+    if (mlo && mlo != mhi) {
+        Bfree(mlo);
+    }
+    Bfree(mhi);
+}
+ret1:
+#ifdef SET_INEXACT
+if (inexact) {
+    if (!oldinexact) {
+        word0(d) = Exp_1 + (70 << Exp_shift);
+        word1(d) = 0;
+        dval(d) += 1.;
+    }
+}
+else if (!oldinexact) {
+    clear_inexact();
+}
+#endif
+Bfree(b);
+*s = 0;
+*decpt = k + 1;
+if (rve) {
+    *rve = s;
+}
+return s0;
+}
+#ifdef __cplusplus
+}
+#endif
+
+PR_IMPLEMENT(PRStatus)
+PR_dtoa(PRFloat64 d, PRIntn mode, PRIntn ndigits,
+        PRIntn *decpt, PRIntn *sign, char **rve, char *buf, PRSize bufsize)
+{
+    char *result;
+    PRSize resultlen;
+    PRStatus rv = PR_FAILURE;
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    if (mode < 0 || mode > 3) {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return rv;
+    }
+    result = dtoa(d, mode, ndigits, decpt, sign, rve);
+    if (!result) {
+        PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+        return rv;
+    }
+    resultlen = strlen(result)+1;
+    if (bufsize < resultlen) {
+        PR_SetError(PR_BUFFER_OVERFLOW_ERROR, 0);
+    } else {
+        memcpy(buf, result, resultlen);
+        if (rve) {
+            *rve = buf + (*rve - result);
+        }
+        rv = PR_SUCCESS;
+    }
+    freedtoa(result);
+    return rv;
+}
+
+/*
+** conversion routines for floating point
+** prcsn - number of digits of precision to generate floating
+** point value.
+** This should be reparameterized so that you can send in a
+**   prcn for the positive and negative ranges.  For now,
+**   conform to the ECMA JavaScript spec which says numbers
+**   less than 1e-6 are in scientific notation.
+** Also, the ECMA spec says that there should always be a
+**   '+' or '-' after the 'e' in scientific notation
+*/
+PR_IMPLEMENT(void)
+PR_cnvtf(char *buf, int bufsz, int prcsn, double dfval)
+{
+    PRIntn decpt, sign, numdigits;
+    char *num, *nump;
+    char *bufp = buf;
+    char *endnum;
+    U fval;
+
+    dval(fval) = dfval;
+    /* If anything fails, we store an empty string in 'buf' */
+    num = (char*)PR_MALLOC(bufsz);
+    if (num == NULL) {
+        buf[0] = '\0';
+        return;
+    }
+    /* XXX Why use mode 1? */
+    if (PR_dtoa(dval(fval),1,prcsn,&decpt,&sign,&endnum,num,bufsz)
+        == PR_FAILURE) {
+        buf[0] = '\0';
+        goto done;
+    }
+    numdigits = endnum - num;
+    nump = num;
+
+    if (sign &&
+        !(word0(fval) == Sign_bit && word1(fval) == 0) &&
+        !((word0(fval) & Exp_mask) == Exp_mask &&
+          (word1(fval) || (word0(fval) & 0xfffff)))) {
+        *bufp++ = '-';
+    }
+
+    if (decpt == 9999) {
+        while ((*bufp++ = *nump++) != 0) {} /* nothing to execute */
+        goto done;
+    }
+
+    if (decpt > (prcsn+1) || decpt < -(prcsn-1) || decpt < -5) {
+        *bufp++ = *nump++;
+        if (numdigits != 1) {
+            *bufp++ = '.';
+        }
+
+        while (*nump != '\0') {
+            *bufp++ = *nump++;
+        }
+        *bufp++ = 'e';
+        PR_snprintf(bufp, bufsz - (bufp - buf), "%+d", decpt-1);
+    } else if (decpt >= 0) {
+        if (decpt == 0) {
+            *bufp++ = '0';
+        } else {
+            while (decpt--) {
+                if (*nump != '\0') {
+                    *bufp++ = *nump++;
+                } else {
+                    *bufp++ = '0';
+                }
+            }
+        }
+        if (*nump != '\0') {
+            *bufp++ = '.';
+            while (*nump != '\0') {
+                *bufp++ = *nump++;
+            }
+        }
+        *bufp++ = '\0';
+    } else if (decpt < 0) {
+        *bufp++ = '0';
+        *bufp++ = '.';
+        while (decpt++) {
+            *bufp++ = '0';
+        }
+
+        while (*nump != '\0') {
+            *bufp++ = *nump++;
+        }
+        *bufp++ = '\0';
+    }
+done:
+    PR_DELETE(num);
+}
diff --git a/nsprpub/pr/src/misc/prenv.c b/nsprpub/pr/src/misc/prenv.c
new file mode 100644
index 0000000000..b057a1c89a
--- /dev/null
+++ b/nsprpub/pr/src/misc/prenv.c
@@ -0,0 +1,170 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <string.h>
+#include <stdlib.h>
+#include "primpl.h"
+#include "prmem.h"
+
+#if defined(XP_UNIX)
+#include <unistd.h>
+#if defined(DARWIN)
+#if defined(HAVE_CRT_EXTERNS_H)
+#include <crt_externs.h>
+#endif /* HAVE_CRT_EXTERNS_H */
+#else  /* DARWIN */
+PR_IMPORT_DATA(char **) environ;
+#endif /* DARWIN */
+#endif /* XP_UNIX */
+
+#if !defined(HAVE_SECURE_GETENV) && defined(HAVE___SECURE_GETENV)
+#define secure_getenv __secure_getenv
+#define HAVE_SECURE_GETENV 1
+#endif
+
+/* Lock used to lock the environment */
+#if defined(_PR_NO_PREEMPT)
+#define _PR_NEW_LOCK_ENV()
+#define _PR_DELETE_LOCK_ENV()
+#define _PR_LOCK_ENV()
+#define _PR_UNLOCK_ENV()
+#elif defined(_PR_LOCAL_THREADS_ONLY)
+extern _PRCPU * _pr_primordialCPU;
+static PRIntn _is;
+#define _PR_NEW_LOCK_ENV()
+#define _PR_DELETE_LOCK_ENV()
+#define _PR_LOCK_ENV() if (_pr_primordialCPU) _PR_INTSOFF(_is);
+#define _PR_UNLOCK_ENV() if (_pr_primordialCPU) _PR_INTSON(_is);
+#else
+static PRLock *_pr_envLock = NULL;
+#define _PR_NEW_LOCK_ENV() {_pr_envLock = PR_NewLock();}
+#define _PR_DELETE_LOCK_ENV() \
+    { if (_pr_envLock) { PR_DestroyLock(_pr_envLock); _pr_envLock = NULL; } }
+#define _PR_LOCK_ENV() { if (_pr_envLock) PR_Lock(_pr_envLock); }
+#define _PR_UNLOCK_ENV() { if (_pr_envLock) PR_Unlock(_pr_envLock); }
+#endif
+
+/************************************************************************/
+
+void _PR_InitEnv(void)
+{
+    _PR_NEW_LOCK_ENV();
+}
+
+void _PR_CleanupEnv(void)
+{
+    _PR_DELETE_LOCK_ENV();
+}
+
+PR_IMPLEMENT(char*) PR_GetEnv(const char *var)
+{
+    char *ev;
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    _PR_LOCK_ENV();
+    ev = _PR_MD_GET_ENV(var);
+    _PR_UNLOCK_ENV();
+    return ev;
+}
+
+PR_IMPLEMENT(char*) PR_GetEnvSecure(const char *var)
+{
+#ifdef HAVE_SECURE_GETENV
+    char *ev;
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    _PR_LOCK_ENV();
+    ev = secure_getenv(var);
+    _PR_UNLOCK_ENV();
+
+    return ev;
+#else
+#ifdef XP_UNIX
+    /*
+    ** Fall back to checking uids and gids.  This won't detect any other
+    ** privilege-granting mechanisms the platform may have.  This also
+    ** can't detect the case where the process already called
+    ** setuid(geteuid()) and/or setgid(getegid()).
+    */
+    if (getuid() != geteuid() || getgid() != getegid()) {
+        return NULL;
+    }
+#endif /* XP_UNIX */
+    return PR_GetEnv(var);
+#endif /* HAVE_SECURE_GETENV */
+}
+
+PR_IMPLEMENT(PRStatus) PR_SetEnv(const char *string)
+{
+    PRIntn result;
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    if (!strchr(string, '=')) {
+        return(PR_FAILURE);
+    }
+
+    _PR_LOCK_ENV();
+    result = _PR_MD_PUT_ENV((char*)string);
+    _PR_UNLOCK_ENV();
+    return result ? PR_FAILURE : PR_SUCCESS;
+}
+
+#if defined(XP_UNIX) && (!defined(DARWIN) || defined(HAVE_CRT_EXTERNS_H))
+PR_IMPLEMENT(char **) PR_DuplicateEnvironment(void)
+{
+    char **the_environ, **result, **end, **src, **dst;
+
+    _PR_LOCK_ENV();
+#ifdef DARWIN
+    the_environ = *(_NSGetEnviron());
+#else
+    the_environ = environ;
+#endif
+
+    for (end = the_environ; *end != NULL; end++)
+        /* empty loop body */;
+
+    result = (char **)PR_Malloc(sizeof(char *) * (end - the_environ + 1));
+    if (result != NULL) {
+        for (src = the_environ, dst = result; src != end; src++, dst++) {
+            size_t len;
+
+            len = strlen(*src) + 1;
+            *dst = PR_Malloc(len);
+            if (*dst == NULL) {
+                /* Allocation failed.  Must clean up the half-copied env. */
+                char **to_delete;
+
+                for (to_delete = result; to_delete != dst; to_delete++) {
+                    PR_Free(*to_delete);
+                }
+                PR_Free(result);
+                result = NULL;
+                goto out;
+            }
+            memcpy(*dst, *src, len);
+        }
+        *dst = NULL;
+    }
+out:
+    _PR_UNLOCK_ENV();
+    return result;
+}
+#else
+/* This platform doesn't support raw access to the environ block. */
+PR_IMPLEMENT(char **) PR_DuplicateEnvironment(void)
+{
+    return NULL;
+}
+#endif
diff --git a/nsprpub/pr/src/misc/prerr.c b/nsprpub/pr/src/misc/prerr.c
new file mode 100644
index 0000000000..99cf39f8c2
--- /dev/null
+++ b/nsprpub/pr/src/misc/prerr.c
@@ -0,0 +1,97 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ *
+ * prerr.c
+ * This file is automatically generated; please do not edit it.
+ */
+#include "prerror.h"
+static const struct PRErrorMessage text[] = {
+    {"PR_OUT_OF_MEMORY_ERROR",    "Memory allocation attempt failed"},
+    {"PR_BAD_DESCRIPTOR_ERROR",    "Invalid file descriptor"},
+    {"PR_WOULD_BLOCK_ERROR",    "The operation would have blocked"},
+    {"PR_ACCESS_FAULT_ERROR",    "Invalid memory address argument"},
+    {"PR_INVALID_METHOD_ERROR",    "Invalid function for file type"},
+    {"PR_ILLEGAL_ACCESS_ERROR",    "Invalid memory address argument"},
+    {"PR_UNKNOWN_ERROR",    "Some unknown error has occurred"},
+    {"PR_PENDING_INTERRUPT_ERROR",    "Operation interrupted by another thread"},
+    {"PR_NOT_IMPLEMENTED_ERROR",    "function not implemented"},
+    {"PR_IO_ERROR",    "I/O function error"},
+    {"PR_IO_TIMEOUT_ERROR",    "I/O operation timed out"},
+    {"PR_IO_PENDING_ERROR",    "I/O operation on busy file descriptor"},
+    {"PR_DIRECTORY_OPEN_ERROR",    "The directory could not be opened"},
+    {"PR_INVALID_ARGUMENT_ERROR",    "Invalid function argument"},
+    {"PR_ADDRESS_NOT_AVAILABLE_ERROR",    "Network address not available (in use?)"},
+    {"PR_ADDRESS_NOT_SUPPORTED_ERROR",    "Network address type not supported"},
+    {"PR_IS_CONNECTED_ERROR",    "Already connected"},
+    {"PR_BAD_ADDRESS_ERROR",    "Network address is invalid"},
+    {"PR_ADDRESS_IN_USE_ERROR",    "Local Network address is in use"},
+    {"PR_CONNECT_REFUSED_ERROR",    "Connection refused by peer"},
+    {"PR_NETWORK_UNREACHABLE_ERROR",    "Network address is presently unreachable"},
+    {"PR_CONNECT_TIMEOUT_ERROR",    "Connection attempt timed out"},
+    {"PR_NOT_CONNECTED_ERROR",    "Network file descriptor is not connected"},
+    {"PR_LOAD_LIBRARY_ERROR",    "Failure to load dynamic library"},
+    {"PR_UNLOAD_LIBRARY_ERROR",    "Failure to unload dynamic library"},
+    {"PR_FIND_SYMBOL_ERROR",    "Symbol not found in any of the loaded dynamic libraries"},
+    {"PR_INSUFFICIENT_RESOURCES_ERROR",    "Insufficient system resources"},
+    {"PR_DIRECTORY_LOOKUP_ERROR",    "A directory lookup on a network address has failed"},
+    {"PR_TPD_RANGE_ERROR",    "Attempt to access a TPD key that is out of range"},
+    {"PR_PROC_DESC_TABLE_FULL_ERROR",    "Process open FD table is full"},
+    {"PR_SYS_DESC_TABLE_FULL_ERROR",    "System open FD table is full"},
+    {"PR_NOT_SOCKET_ERROR",    "Network operation attempted on non-network file descriptor"},
+    {"PR_NOT_TCP_SOCKET_ERROR",    "TCP-specific function attempted on a non-TCP file descriptor"},
+    {"PR_SOCKET_ADDRESS_IS_BOUND_ERROR",    "TCP file descriptor is already bound"},
+    {"PR_NO_ACCESS_RIGHTS_ERROR",    "Access Denied"},
+    {"PR_OPERATION_NOT_SUPPORTED_ERROR",    "The requested operation is not supported by the platform"},
+    {"PR_PROTOCOL_NOT_SUPPORTED_ERROR",    "The host operating system does not support the protocol requested"},
+    {"PR_REMOTE_FILE_ERROR",    "Access to the remote file has been severed"},
+    {"PR_BUFFER_OVERFLOW_ERROR",    "The value requested is too large to be stored in the data buffer provided"},
+    {"PR_CONNECT_RESET_ERROR",    "TCP connection reset by peer"},
+    {"PR_RANGE_ERROR",    "Unused"},
+    {"PR_DEADLOCK_ERROR",    "The operation would have deadlocked"},
+    {"PR_FILE_IS_LOCKED_ERROR",    "The file is already locked"},
+    {"PR_FILE_TOO_BIG_ERROR",    "Write would result in file larger than the system allows"},
+    {"PR_NO_DEVICE_SPACE_ERROR",    "The device for storing the file is full"},
+    {"PR_PIPE_ERROR",    "Unused"},
+    {"PR_NO_SEEK_DEVICE_ERROR",    "Unused"},
+    {"PR_IS_DIRECTORY_ERROR",    "Cannot perform a normal file operation on a directory"},
+    {"PR_LOOP_ERROR",    "Symbolic link loop"},
+    {"PR_NAME_TOO_LONG_ERROR",    "File name is too long"},
+    {"PR_FILE_NOT_FOUND_ERROR",    "File not found"},
+    {"PR_NOT_DIRECTORY_ERROR",    "Cannot perform directory operation on a normal file"},
+    {"PR_READ_ONLY_FILESYSTEM_ERROR",    "Cannot write to a read-only file system"},
+    {"PR_DIRECTORY_NOT_EMPTY_ERROR",    "Cannot delete a directory that is not empty"},
+    {"PR_FILESYSTEM_MOUNTED_ERROR",    "Cannot delete or rename a file object while the file system is busy"},
+    {"PR_NOT_SAME_DEVICE_ERROR",    "Cannot rename a file to a file system on another device"},
+    {"PR_DIRECTORY_CORRUPTED_ERROR",    "The directory object in the file system is corrupted"},
+    {"PR_FILE_EXISTS_ERROR",    "Cannot create or rename a filename that already exists"},
+    {"PR_MAX_DIRECTORY_ENTRIES_ERROR",    "Directory is full.  No additional filenames may be added"},
+    {"PR_INVALID_DEVICE_STATE_ERROR",    "The required device was in an invalid state"},
+    {"PR_DEVICE_IS_LOCKED_ERROR",    "The device is locked"},
+    {"PR_NO_MORE_FILES_ERROR",    "No more entries in the directory"},
+    {"PR_END_OF_FILE_ERROR",    "Encountered end of file"},
+    {"PR_FILE_SEEK_ERROR",    "Seek error"},
+    {"PR_FILE_IS_BUSY_ERROR",    "The file is busy"},
+    {"PR_OPERATION_ABORTED_ERROR",    "The I/O operation was aborted"},
+    {"PR_IN_PROGRESS_ERROR",    "Operation is still in progress (probably a non-blocking connect)"},
+    {"PR_ALREADY_INITIATED_ERROR",    "Operation has already been initiated (probably a non-blocking connect)"},
+    {"PR_GROUP_EMPTY_ERROR",    "The wait group is empty"},
+    {"PR_INVALID_STATE_ERROR",    "Object state improper for request"},
+    {"PR_NETWORK_DOWN_ERROR",    "Network is down"},
+    {"PR_SOCKET_SHUTDOWN_ERROR",    "Socket shutdown"},
+    {"PR_CONNECT_ABORTED_ERROR",    "Connection aborted"},
+    {"PR_HOST_UNREACHABLE_ERROR",    "Host is unreachable"},
+    {"PR_LIBRARY_NOT_LOADED_ERROR",    "The library is not loaded"},
+    {"PR_CALL_ONCE_ERROR",    "The one-time function was previously called and failed. Its error code is no longer available"},
+    {"PR_MAX_ERROR",    "Placeholder for the end of the list"},
+    {0, 0}
+};
+
+static const struct PRErrorTable et = { text, "prerr", -6000L, 77 };
+
+void nspr_InitializePRErrorTable(void) {
+    PR_ErrorInstallTable(&et);
+}
diff --git a/nsprpub/pr/src/misc/prerr.et b/nsprpub/pr/src/misc/prerr.et
new file mode 100644
index 0000000000..fa81aafcf6
--- /dev/null
+++ b/nsprpub/pr/src/misc/prerr.et
@@ -0,0 +1,108 @@
+# 
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+et nspr -6000
+
+ec PR_OUT_OF_MEMORY_ERROR,      "Memory allocation attempt failed"
+ec PR_BAD_DESCRIPTOR_ERROR,     "Invalid file descriptor"
+ec PR_WOULD_BLOCK_ERROR,        "The operation would have blocked"
+ec PR_ACCESS_FAULT_ERROR,       "Invalid memory address argument"
+ec PR_INVALID_METHOD_ERROR,     "Invalid function for file type"
+ec PR_ILLEGAL_ACCESS_ERROR,     "Invalid memory address argument"
+ec PR_UNKNOWN_ERROR,            "Some unknown error has occurred"
+ec PR_PENDING_INTERRUPT_ERROR,"Operation interrupted by another thread"
+ec PR_NOT_IMPLEMENTED_ERROR,    "function not implemented"
+ec PR_IO_ERROR,                 "I/O function error"
+ec PR_IO_TIMEOUT_ERROR,         "I/O operation timed out"
+ec PR_IO_PENDING_ERROR,         "I/O operation on busy file descriptor"
+ec PR_DIRECTORY_OPEN_ERROR,     "The directory could not be opened"
+ec PR_INVALID_ARGUMENT_ERROR, "Invalid function argument"
+ec PR_ADDRESS_NOT_AVAILABLE_ERROR, "Network address not available (in use?)"
+ec PR_ADDRESS_NOT_SUPPORTED_ERROR, "Network address type not supported"
+ec PR_IS_CONNECTED_ERROR,       "Already connected"
+ec PR_BAD_ADDRESS_ERROR,        "Network address is invalid"
+ec PR_ADDRESS_IN_USE_ERROR,     "Local Network address is in use"
+ec PR_CONNECT_REFUSED_ERROR,    "Connection refused by peer"
+ec PR_NETWORK_UNREACHABLE_ERROR, "Network address is presently unreachable"
+ec PR_CONNECT_TIMEOUT_ERROR,    "Connection attempt timed out"
+ec PR_NOT_CONNECTED_ERROR,      "Network file descriptor is not connected"
+ec PR_LOAD_LIBRARY_ERROR,       "Failure to load dynamic library"
+ec PR_UNLOAD_LIBRARY_ERROR,     "Failure to unload dynamic library"
+ec PR_FIND_SYMBOL_ERROR,
+"Symbol not found in any of the loaded dynamic libraries"
+ec PR_INSUFFICIENT_RESOURCES_ERROR, "Insufficient system resources"
+ec PR_DIRECTORY_LOOKUP_ERROR,
+"A directory lookup on a network address has failed"
+ec PR_TPD_RANGE_ERROR,
+"Attempt to access a TPD key that is out of range"
+ec PR_PROC_DESC_TABLE_FULL_ERROR, "Process open FD table is full"
+ec PR_SYS_DESC_TABLE_FULL_ERROR, "System open FD table is full"
+ec PR_NOT_SOCKET_ERROR,
+"Network operation attempted on non-network file descriptor"
+ec PR_NOT_TCP_SOCKET_ERROR,
+"TCP-specific function attempted on a non-TCP file descriptor"
+ec PR_SOCKET_ADDRESS_IS_BOUND_ERROR, "TCP file descriptor is already bound"
+ec PR_NO_ACCESS_RIGHTS_ERROR, "Access Denied"
+ec PR_OPERATION_NOT_SUPPORTED_ERROR,
+"The requested operation is not supported by the platform"
+ec PR_PROTOCOL_NOT_SUPPORTED_ERROR,
+"The host operating system does not support the protocol requested"
+ec PR_REMOTE_FILE_ERROR,        "Access to the remote file has been severed"
+ec PR_BUFFER_OVERFLOW_ERROR,
+"The value requested is too large to be stored in the data buffer provided"
+ec PR_CONNECT_RESET_ERROR,      "TCP connection reset by peer"
+ec PR_RANGE_ERROR,              "Unused"
+ec PR_DEADLOCK_ERROR,   "The operation would have deadlocked"
+ec PR_FILE_IS_LOCKED_ERROR,     "The file is already locked"
+ec PR_FILE_TOO_BIG_ERROR,
+"Write would result in file larger than the system allows"
+ec PR_NO_DEVICE_SPACE_ERROR,    "The device for storing the file is full"
+ec PR_PIPE_ERROR,               "Unused"
+ec PR_NO_SEEK_DEVICE_ERROR,     "Unused"
+ec PR_IS_DIRECTORY_ERROR,
+"Cannot perform a normal file operation on a directory"
+ec PR_LOOP_ERROR,               "Symbolic link loop"
+ec PR_NAME_TOO_LONG_ERROR,      "File name is too long"
+ec PR_FILE_NOT_FOUND_ERROR,     "File not found"
+ec PR_NOT_DIRECTORY_ERROR,
+"Cannot perform directory operation on a normal file"
+ec PR_READ_ONLY_FILESYSTEM_ERROR,
+"Cannot write to a read-only file system"
+ec PR_DIRECTORY_NOT_EMPTY_ERROR,
+"Cannot delete a directory that is not empty"
+ec PR_FILESYSTEM_MOUNTED_ERROR,
+"Cannot delete or rename a file object while the file system is busy"
+ec PR_NOT_SAME_DEVICE_ERROR,
+"Cannot rename a file to a file system on another device"
+ec PR_DIRECTORY_CORRUPTED_ERROR,
+"The directory object in the file system is corrupted"
+ec PR_FILE_EXISTS_ERROR,
+"Cannot create or rename a filename that already exists"
+ec PR_MAX_DIRECTORY_ENTRIES_ERROR,
+"Directory is full.  No additional filenames may be added"
+ec PR_INVALID_DEVICE_STATE_ERROR,
+"The required device was in an invalid state"
+ec PR_DEVICE_IS_LOCKED_ERROR, "The device is locked"
+ec PR_NO_MORE_FILES_ERROR,      "No more entries in the directory"
+ec PR_END_OF_FILE_ERROR,        "Encountered end of file"
+ec PR_FILE_SEEK_ERROR,  "Seek error"
+ec PR_FILE_IS_BUSY_ERROR,       "The file is busy"
+ec PR_OPERATION_ABORTED_ERROR,  "The I/O operation was aborted"
+ec PR_IN_PROGRESS_ERROR,
+"Operation is still in progress (probably a non-blocking connect)"
+ec PR_ALREADY_INITIATED_ERROR,
+"Operation has already been initiated (probably a non-blocking connect)"
+ec PR_GROUP_EMPTY_ERROR,        "The wait group is empty"
+ec PR_INVALID_STATE_ERROR,      "Object state improper for request"
+ec PR_NETWORK_DOWN_ERROR,       "Network is down"
+ec PR_SOCKET_SHUTDOWN_ERROR,    "Socket shutdown"
+ec PR_CONNECT_ABORTED_ERROR,    "Connection aborted"
+ec PR_HOST_UNREACHABLE_ERROR,   "Host is unreachable"
+ec PR_LIBRARY_NOT_LOADED_ERROR, "The library is not loaded"
+ec PR_CALL_ONCE_ERROR, "The one-time function was previously called and failed. Its error code is no longer available"
+
+ec PR_MAX_ERROR,                "Placeholder for the end of the list"
+
+end
diff --git a/nsprpub/pr/src/misc/prerr.properties b/nsprpub/pr/src/misc/prerr.properties
new file mode 100644
index 0000000000..ef236b138a
--- /dev/null
+++ b/nsprpub/pr/src/misc/prerr.properties
@@ -0,0 +1,85 @@
+# 
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#
+# prerr.properties
+# This file is automatically generated; please do not edit it.
+PR_OUT_OF_MEMORY_ERROR=Memory allocation attempt failed
+PR_BAD_DESCRIPTOR_ERROR=Invalid file descriptor
+PR_WOULD_BLOCK_ERROR=The operation would have blocked
+PR_ACCESS_FAULT_ERROR=Invalid memory address argument
+PR_INVALID_METHOD_ERROR=Invalid function for file type
+PR_ILLEGAL_ACCESS_ERROR=Invalid memory address argument
+PR_UNKNOWN_ERROR=Some unknown error has occurred
+PR_PENDING_INTERRUPT_ERROR=Operation interrupted by another thread
+PR_NOT_IMPLEMENTED_ERROR=function not implemented
+PR_IO_ERROR=I/O function error
+PR_IO_TIMEOUT_ERROR=I/O operation timed out
+PR_IO_PENDING_ERROR=I/O operation on busy file descriptor
+PR_DIRECTORY_OPEN_ERROR=The directory could not be opened
+PR_INVALID_ARGUMENT_ERROR=Invalid function argument
+PR_ADDRESS_NOT_AVAILABLE_ERROR=Network address not available (in use?)
+PR_ADDRESS_NOT_SUPPORTED_ERROR=Network address type not supported
+PR_IS_CONNECTED_ERROR=Already connected
+PR_BAD_ADDRESS_ERROR=Network address is invalid
+PR_ADDRESS_IN_USE_ERROR=Local Network address is in use
+PR_CONNECT_REFUSED_ERROR=Connection refused by peer
+PR_NETWORK_UNREACHABLE_ERROR=Network address is presently unreachable
+PR_CONNECT_TIMEOUT_ERROR=Connection attempt timed out
+PR_NOT_CONNECTED_ERROR=Network file descriptor is not connected
+PR_LOAD_LIBRARY_ERROR=Failure to load dynamic library
+PR_UNLOAD_LIBRARY_ERROR=Failure to unload dynamic library
+PR_FIND_SYMBOL_ERROR=Symbol not found in any of the loaded dynamic libraries
+PR_INSUFFICIENT_RESOURCES_ERROR=Insufficient system resources
+PR_DIRECTORY_LOOKUP_ERROR=A directory lookup on a network address has failed
+PR_TPD_RANGE_ERROR=Attempt to access a TPD key that is out of range
+PR_PROC_DESC_TABLE_FULL_ERROR=Process open FD table is full
+PR_SYS_DESC_TABLE_FULL_ERROR=System open FD table is full
+PR_NOT_SOCKET_ERROR=Network operation attempted on non-network file descriptor
+PR_NOT_TCP_SOCKET_ERROR=TCP-specific function attempted on a non-TCP file descriptor
+PR_SOCKET_ADDRESS_IS_BOUND_ERROR=TCP file descriptor is already bound
+PR_NO_ACCESS_RIGHTS_ERROR=Access Denied
+PR_OPERATION_NOT_SUPPORTED_ERROR=The requested operation is not supported by the platform
+PR_PROTOCOL_NOT_SUPPORTED_ERROR=The host operating system does not support the protocol requested
+PR_REMOTE_FILE_ERROR=Access to the remote file has been severed
+PR_BUFFER_OVERFLOW_ERROR=The value requested is too large to be stored in the data buffer provided
+PR_CONNECT_RESET_ERROR=TCP connection reset by peer
+PR_RANGE_ERROR=Unused
+PR_DEADLOCK_ERROR=The operation would have deadlocked
+PR_FILE_IS_LOCKED_ERROR=The file is already locked
+PR_FILE_TOO_BIG_ERROR=Write would result in file larger than the system allows
+PR_NO_DEVICE_SPACE_ERROR=The device for storing the file is full
+PR_PIPE_ERROR=Unused
+PR_NO_SEEK_DEVICE_ERROR=Unused
+PR_IS_DIRECTORY_ERROR=Cannot perform a normal file operation on a directory
+PR_LOOP_ERROR=Symbolic link loop
+PR_NAME_TOO_LONG_ERROR=File name is too long
+PR_FILE_NOT_FOUND_ERROR=File not found
+PR_NOT_DIRECTORY_ERROR=Cannot perform directory operation on a normal file
+PR_READ_ONLY_FILESYSTEM_ERROR=Cannot write to a read-only file system
+PR_DIRECTORY_NOT_EMPTY_ERROR=Cannot delete a directory that is not empty
+PR_FILESYSTEM_MOUNTED_ERROR=Cannot delete or rename a file object while the file system is busy
+PR_NOT_SAME_DEVICE_ERROR=Cannot rename a file to a file system on another device
+PR_DIRECTORY_CORRUPTED_ERROR=The directory object in the file system is corrupted
+PR_FILE_EXISTS_ERROR=Cannot create or rename a filename that already exists
+PR_MAX_DIRECTORY_ENTRIES_ERROR=Directory is full.  No additional filenames may be added
+PR_INVALID_DEVICE_STATE_ERROR=The required device was in an invalid state
+PR_DEVICE_IS_LOCKED_ERROR=The device is locked
+PR_NO_MORE_FILES_ERROR=No more entries in the directory
+PR_END_OF_FILE_ERROR=Encountered end of file
+PR_FILE_SEEK_ERROR=Seek error
+PR_FILE_IS_BUSY_ERROR=The file is busy
+PR_OPERATION_ABORTED_ERROR=The I/O operation was aborted
+PR_IN_PROGRESS_ERROR=Operation is still in progress (probably a non-blocking connect)
+PR_ALREADY_INITIATED_ERROR=Operation has already been initiated (probably a non-blocking connect)
+PR_GROUP_EMPTY_ERROR=The wait group is empty
+PR_INVALID_STATE_ERROR=Object state improper for request
+PR_NETWORK_DOWN_ERROR=Network is down
+PR_SOCKET_SHUTDOWN_ERROR=Socket shutdown
+PR_CONNECT_ABORTED_ERROR=Connection aborted
+PR_HOST_UNREACHABLE_ERROR=Host is unreachable
+PR_LIBRARY_NOT_LOADED_ERROR=The library is not loaded
+PR_CALL_ONCE_ERROR=The one-time function was previously called and failed. Its error code is no longer available
+PR_MAX_ERROR=Placeholder for the end of the list
diff --git a/nsprpub/pr/src/misc/prerror.c b/nsprpub/pr/src/misc/prerror.c
new file mode 100644
index 0000000000..a06b78ddbc
--- /dev/null
+++ b/nsprpub/pr/src/misc/prerror.c
@@ -0,0 +1,78 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "primpl.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+PR_IMPLEMENT(PRErrorCode) PR_GetError(void)
+{
+    PRThread *thread = PR_GetCurrentThread();
+    return thread->errorCode;
+}
+
+PR_IMPLEMENT(PRInt32) PR_GetOSError(void)
+{
+    PRThread *thread = PR_GetCurrentThread();
+    return thread->osErrorCode;
+}
+
+PR_IMPLEMENT(void) PR_SetError(PRErrorCode code, PRInt32 osErr)
+{
+    PRThread *thread = PR_GetCurrentThread();
+    thread->errorCode = code;
+    thread->osErrorCode = osErr;
+    thread->errorStringLength = 0;
+}
+
+PR_IMPLEMENT(void) PR_SetErrorText(PRIntn textLength, const char *text)
+{
+    PRThread *thread = PR_GetCurrentThread();
+
+    if (0 == textLength)
+    {
+        if (NULL != thread->errorString) {
+            PR_DELETE(thread->errorString);
+        }
+        thread->errorStringSize = 0;
+    }
+    else
+    {
+        PRIntn size = textLength + 31;  /* actual length to allocate. Plus a little extra */
+        if (thread->errorStringSize < textLength+1)  /* do we have room? */
+        {
+            if (NULL != thread->errorString) {
+                PR_DELETE(thread->errorString);
+            }
+            thread->errorString = (char*)PR_MALLOC(size);
+            if ( NULL == thread->errorString ) {
+                thread->errorStringSize = 0;
+                thread->errorStringLength = 0;
+                return;
+            }
+            thread->errorStringSize = size;
+        }
+        memcpy(thread->errorString, text, textLength+1 );
+    }
+    thread->errorStringLength = textLength;
+}
+
+PR_IMPLEMENT(PRInt32) PR_GetErrorTextLength(void)
+{
+    PRThread *thread = PR_GetCurrentThread();
+    return thread->errorStringLength;
+}  /* PR_GetErrorTextLength */
+
+PR_IMPLEMENT(PRInt32) PR_GetErrorText(char *text)
+{
+    PRThread *thread = PR_GetCurrentThread();
+    if (0 != thread->errorStringLength) {
+        memcpy(text, thread->errorString, thread->errorStringLength+1);
+    }
+    return thread->errorStringLength;
+}  /* PR_GetErrorText */
+
+
diff --git a/nsprpub/pr/src/misc/prerrortable.c b/nsprpub/pr/src/misc/prerrortable.c
new file mode 100644
index 0000000000..a7ff4f0eb5
--- /dev/null
+++ b/nsprpub/pr/src/misc/prerrortable.c
@@ -0,0 +1,209 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+
+
+/*
+
+Copyright 1987, 1988 by the Student Information Processing Board
+    of the Massachusetts Institute of Technology
+
+Permission to use, copy, modify, and distribute this software
+and its documentation for any purpose and without fee is
+hereby granted, provided that the above copyright notice
+appear in all copies and that both that copyright notice and
+this permission notice appear in supporting documentation,
+and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
+used in advertising or publicity pertaining to distribution
+of the software without specific, written prior permission.
+M.I.T. and the M.I.T. S.I.P.B. make no representations about
+the suitability of this software for any purpose.  It is
+provided "as is" without express or implied warranty.
+
+*/
+
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+#include "prmem.h"
+#include "prerror.h"
+
+#define ERRCODE_RANGE   8   /* # of bits to shift table number */
+#define BITS_PER_CHAR   6   /* # bits to shift per character in name */
+
+#ifdef NEED_SYS_ERRLIST
+extern char const * const sys_errlist[];
+extern const int sys_nerr;
+#endif
+
+/* List of error tables */
+struct PRErrorTableList {
+    struct PRErrorTableList *next;
+    const struct PRErrorTable *table;
+    struct PRErrorCallbackTablePrivate *table_private;
+};
+static struct PRErrorTableList * Table_List = (struct PRErrorTableList *) NULL;
+
+/* Supported languages */
+static const char * default_languages[] = { "i-default", "en", 0 };
+static const char * const * callback_languages = default_languages;
+
+/* Callback info */
+static struct PRErrorCallbackPrivate *callback_private = 0;
+static PRErrorCallbackLookupFn *callback_lookup = 0;
+static PRErrorCallbackNewTableFn *callback_newtable = 0;
+
+
+static const char char_set[] =
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
+
+static const char *
+error_table_name (PRErrorCode num)
+{
+    static char buf[6]; /* only used if internal code problems exist */
+
+    long ch;
+    int i;
+    char *p;
+
+    /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */
+    p = buf;
+    num >>= ERRCODE_RANGE;
+    /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */
+    num &= 077777777;
+    /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */
+    for (i = 4; i >= 0; i--) {
+        ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1);
+        if (ch != 0) {
+            *p++ = char_set[ch-1];
+        }
+    }
+    *p = '\0';
+    return(buf);
+}
+
+PR_IMPLEMENT(const char *)
+PR_ErrorToString(PRErrorCode code, PRLanguageCode language)
+{
+    /* static buffer only used if code is using inconsistent error message
+     * numbers, so just ignore the possible thread contention
+     */
+    static char buffer[25];
+
+    const char *msg;
+    int offset;
+    PRErrorCode table_num;
+    struct PRErrorTableList *et;
+    int started = 0;
+    char *cp;
+
+    for (et = Table_List; et; et = et->next) {
+        if (et->table->base <= code &&
+            et->table->base + et->table->n_msgs > code) {
+            /* This is the right table */
+            if (callback_lookup) {
+                msg = callback_lookup(code, language, et->table,
+                                      callback_private, et->table_private);
+                if (msg) {
+                    return msg;
+                }
+            }
+
+            return(et->table->msgs[code - et->table->base].en_text);
+        }
+    }
+
+    if (code >= 0 && code < 256) {
+        return strerror(code);
+    }
+
+    offset = (int) (code & ((1<<ERRCODE_RANGE)-1));
+    table_num = code - offset;
+    strcpy (buffer, "Unknown code ");
+    if (table_num) {
+        strcat(buffer, error_table_name (table_num));
+        strcat(buffer, " ");
+    }
+    for (cp = buffer; *cp; cp++)
+        ;
+    if (offset >= 100) {
+        *cp++ = (char)('0' + offset / 100);
+        offset %= 100;
+        started++;
+    }
+    if (started || offset >= 10) {
+        *cp++ = (char)('0' + offset / 10);
+        offset %= 10;
+    }
+    *cp++ = (char)('0' + offset);
+    *cp = '\0';
+    return(buffer);
+}
+
+PR_IMPLEMENT(const char *)
+PR_ErrorToName(PRErrorCode code)
+{
+    struct PRErrorTableList *et;
+
+    for (et = Table_List; et; et = et->next) {
+        if (et->table->base <= code &&
+            et->table->base + et->table->n_msgs > code) {
+            /* This is the right table */
+            return(et->table->msgs[code - et->table->base].name);
+        }
+    }
+
+    return 0;
+}
+
+PR_IMPLEMENT(const char * const *)
+PR_ErrorLanguages(void)
+{
+    return callback_languages;
+}
+
+PR_IMPLEMENT(PRErrorCode)
+PR_ErrorInstallTable(const struct PRErrorTable *table)
+{
+    struct PRErrorTableList * new_et;
+
+    new_et = (struct PRErrorTableList *)
+             PR_Malloc(sizeof(struct PRErrorTableList));
+    if (!new_et) {
+        return errno;    /* oops */
+    }
+    new_et->table = table;
+    if (callback_newtable) {
+        new_et->table_private = callback_newtable(table, callback_private);
+    } else {
+        new_et->table_private = 0;
+    }
+    new_et->next = Table_List;
+    Table_List = new_et;
+    return 0;
+}
+
+PR_IMPLEMENT(void)
+PR_ErrorInstallCallback(const char * const * languages,
+                        PRErrorCallbackLookupFn *lookup,
+                        PRErrorCallbackNewTableFn *newtable,
+                        struct PRErrorCallbackPrivate *cb_private)
+{
+    struct PRErrorTableList *et;
+
+    assert(strcmp(languages[0], "i-default") == 0);
+    assert(strcmp(languages[1], "en") == 0);
+
+    callback_languages = languages;
+    callback_lookup = lookup;
+    callback_newtable = newtable;
+    callback_private = cb_private;
+
+    if (callback_newtable) {
+        for (et = Table_List; et; et = et->next) {
+            et->table_private = callback_newtable(et->table, callback_private);
+        }
+    }
+}
diff --git a/nsprpub/pr/src/misc/prinit.c b/nsprpub/pr/src/misc/prinit.c
new file mode 100644
index 0000000000..a952ad6554
--- /dev/null
+++ b/nsprpub/pr/src/misc/prinit.c
@@ -0,0 +1,857 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "primpl.h"
+#include <ctype.h>
+#include <string.h>
+
+PRLogModuleInfo *_pr_clock_lm;
+PRLogModuleInfo *_pr_cmon_lm;
+PRLogModuleInfo *_pr_io_lm;
+PRLogModuleInfo *_pr_cvar_lm;
+PRLogModuleInfo *_pr_mon_lm;
+PRLogModuleInfo *_pr_linker_lm;
+PRLogModuleInfo *_pr_sched_lm;
+PRLogModuleInfo *_pr_thread_lm;
+PRLogModuleInfo *_pr_gc_lm;
+PRLogModuleInfo *_pr_shm_lm;
+PRLogModuleInfo *_pr_shma_lm;
+
+PRFileDesc *_pr_stdin;
+PRFileDesc *_pr_stdout;
+PRFileDesc *_pr_stderr;
+
+#if !defined(_PR_PTHREADS) && !defined(_PR_BTHREADS)
+
+PRCList _pr_active_local_threadQ =
+    PR_INIT_STATIC_CLIST(&_pr_active_local_threadQ);
+PRCList _pr_active_global_threadQ =
+    PR_INIT_STATIC_CLIST(&_pr_active_global_threadQ);
+
+_MDLock  _pr_cpuLock;           /* lock for the CPU Q */
+PRCList _pr_cpuQ = PR_INIT_STATIC_CLIST(&_pr_cpuQ);
+
+PRUint32 _pr_utid;
+
+PRInt32 _pr_userActive;
+PRInt32 _pr_systemActive;
+PRUintn _pr_maxPTDs;
+
+#ifdef _PR_LOCAL_THREADS_ONLY
+
+struct _PRCPU   *_pr_currentCPU;
+PRThread    *_pr_currentThread;
+PRThread    *_pr_lastThread;
+PRInt32     _pr_intsOff;
+
+#endif /* _PR_LOCAL_THREADS_ONLY */
+
+/* Lock protecting all "termination" condition variables of all threads */
+PRLock *_pr_terminationCVLock;
+
+#endif /* !defined(_PR_PTHREADS) */
+
+PRLock *_pr_sleeplock;  /* used in PR_Sleep(), classic and pthreads */
+
+static void _PR_InitCallOnce(void);
+
+PRBool _pr_initialized = PR_FALSE;
+
+
+PR_IMPLEMENT(PRBool) PR_VersionCheck(const char *importedVersion)
+{
+    /*
+    ** This is the secret handshake algorithm.
+    **
+    ** This release has a simple version compatibility
+    ** check algorithm.  This release is not backward
+    ** compatible with previous major releases.  It is
+    ** not compatible with future major, minor, or
+    ** patch releases.
+    */
+    int vmajor = 0, vminor = 0, vpatch = 0;
+    const char *ptr = importedVersion;
+
+    while (isdigit(*ptr)) {
+        vmajor = 10 * vmajor + *ptr - '0';
+        ptr++;
+    }
+    if (*ptr == '.') {
+        ptr++;
+        while (isdigit(*ptr)) {
+            vminor = 10 * vminor + *ptr - '0';
+            ptr++;
+        }
+        if (*ptr == '.') {
+            ptr++;
+            while (isdigit(*ptr)) {
+                vpatch = 10 * vpatch + *ptr - '0';
+                ptr++;
+            }
+        }
+    }
+
+    if (vmajor != PR_VMAJOR) {
+        return PR_FALSE;
+    }
+    if (vmajor == PR_VMAJOR && vminor > PR_VMINOR) {
+        return PR_FALSE;
+    }
+    if (vmajor == PR_VMAJOR && vminor == PR_VMINOR && vpatch > PR_VPATCH) {
+        return PR_FALSE;
+    }
+    return PR_TRUE;
+}  /* PR_VersionCheck */
+
+PR_IMPLEMENT(const char*) PR_GetVersion(void)
+{
+    return PR_VERSION;
+}
+
+PR_IMPLEMENT(PRBool) PR_Initialized(void)
+{
+    return _pr_initialized;
+}
+
+PRInt32 _native_threads_only = 0;
+
+#ifdef WINNT
+static void _pr_SetNativeThreadsOnlyMode(void)
+{
+    HMODULE mainExe;
+    PRBool *globalp;
+    char *envp;
+
+    mainExe = GetModuleHandle(NULL);
+    PR_ASSERT(NULL != mainExe);
+    globalp = (PRBool *) GetProcAddress(mainExe, "nspr_native_threads_only");
+    if (globalp) {
+        _native_threads_only = (*globalp != PR_FALSE);
+    } else if (envp = getenv("NSPR_NATIVE_THREADS_ONLY")) {
+        _native_threads_only = (atoi(envp) == 1);
+    }
+}
+#endif
+
+static void _PR_InitStuff(void)
+{
+
+    if (_pr_initialized) {
+        return;
+    }
+    _pr_initialized = PR_TRUE;
+#ifdef _PR_ZONE_ALLOCATOR
+    _PR_InitZones();
+#endif
+#ifdef WINNT
+    _pr_SetNativeThreadsOnlyMode();
+#endif
+
+
+    (void) PR_GetPageSize();
+
+    _pr_clock_lm = PR_NewLogModule("clock");
+    _pr_cmon_lm = PR_NewLogModule("cmon");
+    _pr_io_lm = PR_NewLogModule("io");
+    _pr_mon_lm = PR_NewLogModule("mon");
+    _pr_linker_lm = PR_NewLogModule("linker");
+    _pr_cvar_lm = PR_NewLogModule("cvar");
+    _pr_sched_lm = PR_NewLogModule("sched");
+    _pr_thread_lm = PR_NewLogModule("thread");
+    _pr_gc_lm = PR_NewLogModule("gc");
+    _pr_shm_lm = PR_NewLogModule("shm");
+    _pr_shma_lm = PR_NewLogModule("shma");
+
+    /* NOTE: These init's cannot depend on _PR_MD_CURRENT_THREAD() */
+    _PR_MD_EARLY_INIT();
+
+    _PR_InitLocks();
+    _PR_InitAtomic();
+    _PR_InitSegs();
+    _PR_InitStacks();
+    _PR_InitTPD();
+    _PR_InitEnv();
+    _PR_InitLayerCache();
+    _PR_InitClock();
+
+    _pr_sleeplock = PR_NewLock();
+    PR_ASSERT(NULL != _pr_sleeplock);
+
+    _PR_InitThreads(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);
+
+#ifdef WIN16
+    {
+        PRInt32 top;   /* artificial top of stack, win16 */
+        _pr_top_of_task_stack = (char *) &top;
+    }
+#endif
+
+#ifndef _PR_GLOBAL_THREADS_ONLY
+    _PR_InitCPUs();
+#endif
+
+    /*
+     * XXX: call _PR_InitMem only on those platforms for which nspr implements
+     *  malloc, for now.
+     */
+#ifdef _PR_OVERRIDE_MALLOC
+    _PR_InitMem();
+#endif
+
+    _PR_InitCMon();
+    _PR_InitIO();
+    _PR_InitNet();
+    _PR_InitTime();
+    _PR_InitLog();
+    _PR_InitLinker();
+    _PR_InitCallOnce();
+    _PR_InitDtoa();
+    _PR_InitMW();
+    _PR_InitRWLocks();
+
+    nspr_InitializePRErrorTable();
+
+    _PR_MD_FINAL_INIT();
+}
+
+void _PR_ImplicitInitialization(void)
+{
+    _PR_InitStuff();
+
+    /* Enable interrupts */
+#if !defined(_PR_PTHREADS) && !defined(_PR_GLOBAL_THREADS_ONLY)
+    _PR_MD_START_INTERRUPTS();
+#endif
+
+}
+
+PR_IMPLEMENT(void) PR_DisableClockInterrupts(void)
+{
+#if !defined(_PR_PTHREADS) && !defined(_PR_BTHREADS)
+    if (!_pr_initialized) {
+        _PR_InitStuff();
+    } else {
+        _PR_MD_DISABLE_CLOCK_INTERRUPTS();
+    }
+#endif
+}
+
+PR_IMPLEMENT(void) PR_EnableClockInterrupts(void)
+{
+#if !defined(_PR_PTHREADS) && !defined(_PR_BTHREADS)
+    if (!_pr_initialized) {
+        _PR_InitStuff();
+    }
+    _PR_MD_ENABLE_CLOCK_INTERRUPTS();
+#endif
+}
+
+PR_IMPLEMENT(void) PR_BlockClockInterrupts(void)
+{
+#if !defined(_PR_PTHREADS) && !defined(_PR_BTHREADS)
+    _PR_MD_BLOCK_CLOCK_INTERRUPTS();
+#endif
+}
+
+PR_IMPLEMENT(void) PR_UnblockClockInterrupts(void)
+{
+#if !defined(_PR_PTHREADS) && !defined(_PR_BTHREADS)
+    _PR_MD_UNBLOCK_CLOCK_INTERRUPTS();
+#endif
+}
+
+PR_IMPLEMENT(void) PR_Init(
+    PRThreadType type, PRThreadPriority priority, PRUintn maxPTDs)
+{
+    _PR_ImplicitInitialization();
+}
+
+PR_IMPLEMENT(PRIntn) PR_Initialize(
+    PRPrimordialFn prmain, PRIntn argc, char **argv, PRUintn maxPTDs)
+{
+    PRIntn rv;
+    _PR_ImplicitInitialization();
+    rv = prmain(argc, argv);
+    PR_Cleanup();
+    return rv;
+}  /* PR_Initialize */
+
+/*
+ *-----------------------------------------------------------------------
+ *
+ * _PR_CleanupBeforeExit --
+ *
+ *   Perform the cleanup work before exiting the process.
+ *   We first do the cleanup generic to all platforms.  Then
+ *   we call _PR_MD_CLEANUP_BEFORE_EXIT(), where platform-dependent
+ *   cleanup is done.  This function is used by PR_Cleanup().
+ *
+ * See also: PR_Cleanup().
+ *
+ *-----------------------------------------------------------------------
+ */
+#if defined(_PR_PTHREADS) || defined(_PR_BTHREADS)
+/* see ptthread.c */
+#else
+static void
+_PR_CleanupBeforeExit(void)
+{
+    /*
+    Do not make any calls here other than to destroy resources.  For example,
+    do not make any calls that eventually may end up in PR_Lock.  Because the
+    thread is destroyed, can not access current thread any more.
+    */
+    _PR_CleanupTPD();
+    if (_pr_terminationCVLock)
+        /*
+         * In light of the comment above, this looks real suspicious.
+         * I'd go so far as to say it's just a problem waiting to happen.
+         */
+    {
+        PR_DestroyLock(_pr_terminationCVLock);
+    }
+
+    _PR_MD_CLEANUP_BEFORE_EXIT();
+}
+#endif /* defined(_PR_PTHREADS) */
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * PR_Cleanup --
+ *
+ *   Perform a graceful shutdown of the NSPR runtime.  PR_Cleanup() may
+ *   only be called from the primordial thread, typically at the
+ *   end of the main() function.  It returns when it has completed
+ *   its platform-dependent duty and the process must not make any other
+ *   NSPR library calls prior to exiting from main().
+ *
+ *   PR_Cleanup() first blocks the primordial thread until all the
+ *   other user (non-system) threads, if any, have terminated.
+ *   Then it performs cleanup in preparation for exiting the process.
+ *   PR_Cleanup() does not exit the primordial thread (which would
+ *   in turn exit the process).
+ *
+ *   PR_Cleanup() only responds when it is called by the primordial
+ *   thread. Calls by any other thread are silently ignored.
+ *
+ * See also: PR_ExitProcess()
+ *
+ *----------------------------------------------------------------------
+ */
+#if defined(_PR_PTHREADS) || defined(_PR_BTHREADS)
+/* see ptthread.c */
+#else
+
+PR_IMPLEMENT(PRStatus) PR_Cleanup()
+{
+    PRThread *me = PR_GetCurrentThread();
+    PR_ASSERT((NULL != me) && (me->flags & _PR_PRIMORDIAL));
+    if ((NULL != me) && (me->flags & _PR_PRIMORDIAL))
+    {
+        PR_LOG(_pr_thread_lm, PR_LOG_MIN, ("PR_Cleanup: shutting down NSPR"));
+
+        /*
+         * No more recycling of threads
+         */
+        _pr_recycleThreads = 0;
+
+        /*
+         * Wait for all other user (non-system/daemon) threads
+         * to terminate.
+         */
+        PR_Lock(_pr_activeLock);
+        while (_pr_userActive > _pr_primordialExitCount) {
+            PR_WaitCondVar(_pr_primordialExitCVar, PR_INTERVAL_NO_TIMEOUT);
+        }
+        if (me->flags & _PR_SYSTEM) {
+            _pr_systemActive--;
+        } else {
+            _pr_userActive--;
+        }
+        PR_Unlock(_pr_activeLock);
+
+        _PR_MD_EARLY_CLEANUP();
+
+        _PR_CleanupMW();
+        _PR_CleanupTime();
+        _PR_CleanupDtoa();
+        _PR_CleanupCallOnce();
+        _PR_ShutdownLinker();
+        _PR_CleanupNet();
+        _PR_CleanupIO();
+        /* Release the primordial thread's private data, etc. */
+        _PR_CleanupThread(me);
+
+        _PR_MD_STOP_INTERRUPTS();
+
+        PR_LOG(_pr_thread_lm, PR_LOG_MIN,
+               ("PR_Cleanup: clean up before destroying thread"));
+        _PR_LogCleanup();
+
+        /*
+         * This part should look like the end of _PR_NativeRunThread
+         * and _PR_UserRunThread.
+         */
+        if (_PR_IS_NATIVE_THREAD(me)) {
+            _PR_MD_EXIT_THREAD(me);
+            _PR_NativeDestroyThread(me);
+        } else {
+            _PR_UserDestroyThread(me);
+            PR_DELETE(me->stack);
+            PR_DELETE(me);
+        }
+
+        /*
+         * XXX: We are freeing the heap memory here so that Purify won't
+         * complain, but we should also free other kinds of resources
+         * that are allocated by the _PR_InitXXX() functions.
+         * Ideally, for each _PR_InitXXX(), there should be a corresponding
+         * _PR_XXXCleanup() that we can call here.
+         */
+#ifdef WINNT
+        _PR_CleanupCPUs();
+#endif
+        _PR_CleanupThreads();
+        _PR_CleanupCMon();
+        PR_DestroyLock(_pr_sleeplock);
+        _pr_sleeplock = NULL;
+        _PR_CleanupLayerCache();
+        _PR_CleanupEnv();
+        _PR_CleanupStacks();
+        _PR_CleanupBeforeExit();
+        _pr_initialized = PR_FALSE;
+        return PR_SUCCESS;
+    }
+    return PR_FAILURE;
+}
+#endif /* defined(_PR_PTHREADS) */
+
+/*
+ *------------------------------------------------------------------------
+ * PR_ProcessExit --
+ *
+ *   Cause an immediate, nongraceful, forced termination of the process.
+ *   It takes a PRIntn argument, which is the exit status code of the
+ *   process.
+ *
+ * See also: PR_Cleanup()
+ *
+ *------------------------------------------------------------------------
+ */
+
+#if defined(_PR_PTHREADS) || defined(_PR_BTHREADS)
+/* see ptthread.c */
+#else
+PR_IMPLEMENT(void) PR_ProcessExit(PRIntn status)
+{
+    _PR_MD_EXIT(status);
+}
+
+#endif /* defined(_PR_PTHREADS) */
+
+PR_IMPLEMENT(PRProcessAttr *)
+PR_NewProcessAttr(void)
+{
+    PRProcessAttr *attr;
+
+    attr = PR_NEWZAP(PRProcessAttr);
+    if (!attr) {
+        PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+    }
+    return attr;
+}
+
+PR_IMPLEMENT(void)
+PR_ResetProcessAttr(PRProcessAttr *attr)
+{
+    PR_FREEIF(attr->currentDirectory);
+    PR_FREEIF(attr->fdInheritBuffer);
+    memset(attr, 0, sizeof(*attr));
+}
+
+PR_IMPLEMENT(void)
+PR_DestroyProcessAttr(PRProcessAttr *attr)
+{
+    PR_FREEIF(attr->currentDirectory);
+    PR_FREEIF(attr->fdInheritBuffer);
+    PR_DELETE(attr);
+}
+
+PR_IMPLEMENT(void)
+PR_ProcessAttrSetStdioRedirect(
+    PRProcessAttr *attr,
+    PRSpecialFD stdioFd,
+    PRFileDesc *redirectFd)
+{
+    switch (stdioFd) {
+        case PR_StandardInput:
+            attr->stdinFd = redirectFd;
+            break;
+        case PR_StandardOutput:
+            attr->stdoutFd = redirectFd;
+            break;
+        case PR_StandardError:
+            attr->stderrFd = redirectFd;
+            break;
+        default:
+            PR_ASSERT(0);
+    }
+}
+
+/*
+ * OBSOLETE
+ */
+PR_IMPLEMENT(void)
+PR_SetStdioRedirect(
+    PRProcessAttr *attr,
+    PRSpecialFD stdioFd,
+    PRFileDesc *redirectFd)
+{
+#if defined(DEBUG)
+    static PRBool warn = PR_TRUE;
+    if (warn) {
+        warn = _PR_Obsolete("PR_SetStdioRedirect()",
+                            "PR_ProcessAttrSetStdioRedirect()");
+    }
+#endif
+    PR_ProcessAttrSetStdioRedirect(attr, stdioFd, redirectFd);
+}
+
+PR_IMPLEMENT(PRStatus)
+PR_ProcessAttrSetCurrentDirectory(
+    PRProcessAttr *attr,
+    const char *dir)
+{
+    PR_FREEIF(attr->currentDirectory);
+    attr->currentDirectory = (char *) PR_MALLOC(strlen(dir) + 1);
+    if (!attr->currentDirectory) {
+        PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+        return PR_FAILURE;
+    }
+    strcpy(attr->currentDirectory, dir);
+    return PR_SUCCESS;
+}
+
+PR_IMPLEMENT(PRStatus)
+PR_ProcessAttrSetInheritableFD(
+    PRProcessAttr *attr,
+    PRFileDesc *fd,
+    const char *name)
+{
+    /* We malloc the fd inherit buffer in multiples of this number. */
+#define FD_INHERIT_BUFFER_INCR 128
+    /* The length of "NSPR_INHERIT_FDS=" */
+#define NSPR_INHERIT_FDS_STRLEN 17
+    /* The length of osfd (PROsfd) printed in hexadecimal with 0x prefix */
+#ifdef _WIN64
+#define OSFD_STRLEN 18
+#else
+#define OSFD_STRLEN 10
+#endif
+    /* The length of fd type (PRDescType) printed in decimal */
+#define FD_TYPE_STRLEN 1
+    PRSize newSize;
+    int remainder;
+    char *newBuffer;
+    int nwritten;
+    char *cur;
+    int freeSize;
+
+    if (fd->identity != PR_NSPR_IO_LAYER) {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return PR_FAILURE;
+    }
+    if (fd->secret->inheritable == _PR_TRI_UNKNOWN) {
+        _PR_MD_QUERY_FD_INHERITABLE(fd);
+    }
+    if (fd->secret->inheritable != _PR_TRI_TRUE) {
+        PR_SetError(PR_NO_ACCESS_RIGHTS_ERROR, 0);
+        return PR_FAILURE;
+    }
+
+    /*
+     * We also need to account for the : separators and the
+     * terminating null byte.
+     */
+    if (NULL == attr->fdInheritBuffer) {
+        /* The first time, we print "NSPR_INHERIT_FDS=<name>:<type>:<val>" */
+        newSize = NSPR_INHERIT_FDS_STRLEN + strlen(name)
+                  + FD_TYPE_STRLEN + OSFD_STRLEN + 2 + 1;
+    } else {
+        /* At other times, we print ":<name>:<type>:<val>" */
+        newSize = attr->fdInheritBufferUsed + strlen(name)
+                  + FD_TYPE_STRLEN + OSFD_STRLEN + 3 + 1;
+    }
+    if (newSize > attr->fdInheritBufferSize) {
+        /* Make newSize a multiple of FD_INHERIT_BUFFER_INCR */
+        remainder = newSize % FD_INHERIT_BUFFER_INCR;
+        if (remainder != 0) {
+            newSize += (FD_INHERIT_BUFFER_INCR - remainder);
+        }
+        if (NULL == attr->fdInheritBuffer) {
+            newBuffer = (char *) PR_MALLOC(newSize);
+        } else {
+            newBuffer = (char *) PR_REALLOC(attr->fdInheritBuffer, newSize);
+        }
+        if (NULL == newBuffer) {
+            PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+            return PR_FAILURE;
+        }
+        attr->fdInheritBuffer = newBuffer;
+        attr->fdInheritBufferSize = newSize;
+    }
+    cur = attr->fdInheritBuffer + attr->fdInheritBufferUsed;
+    freeSize = attr->fdInheritBufferSize - attr->fdInheritBufferUsed;
+    if (0 == attr->fdInheritBufferUsed) {
+        nwritten = PR_snprintf(cur, freeSize,
+                               "NSPR_INHERIT_FDS=%s:%d:0x%" PR_PRIxOSFD,
+                               name, (PRIntn)fd->methods->file_type, fd->secret->md.osfd);
+    } else {
+        nwritten = PR_snprintf(cur, freeSize, ":%s:%d:0x%" PR_PRIxOSFD,
+                               name, (PRIntn)fd->methods->file_type, fd->secret->md.osfd);
+    }
+    attr->fdInheritBufferUsed += nwritten;
+    return PR_SUCCESS;
+}
+
+PR_IMPLEMENT(PRFileDesc *) PR_GetInheritedFD(
+    const char *name)
+{
+    PRFileDesc *fd;
+    const char *envVar;
+    const char *ptr;
+    int len = strlen(name);
+    PROsfd osfd;
+    int nColons;
+    PRIntn fileType;
+
+    envVar = PR_GetEnv("NSPR_INHERIT_FDS");
+    if (NULL == envVar || '\0' == envVar[0]) {
+        PR_SetError(PR_UNKNOWN_ERROR, 0);
+        return NULL;
+    }
+
+    ptr = envVar;
+    while (1) {
+        if ((ptr[len] == ':') && (strncmp(ptr, name, len) == 0)) {
+            ptr += len + 1;
+            if (PR_sscanf(ptr, "%d:0x%" PR_SCNxOSFD, &fileType, &osfd) != 2) {
+                PR_SetError(PR_UNKNOWN_ERROR, 0);
+                return NULL;
+            }
+            switch ((PRDescType)fileType) {
+                case PR_DESC_FILE:
+                    fd = PR_ImportFile(osfd);
+                    break;
+                case PR_DESC_PIPE:
+                    fd = PR_ImportPipe(osfd);
+                    break;
+                case PR_DESC_SOCKET_TCP:
+                    fd = PR_ImportTCPSocket(osfd);
+                    break;
+                case PR_DESC_SOCKET_UDP:
+                    fd = PR_ImportUDPSocket(osfd);
+                    break;
+                default:
+                    PR_ASSERT(0);
+                    PR_SetError(PR_UNKNOWN_ERROR, 0);
+                    fd = NULL;
+                    break;
+            }
+            if (fd) {
+                /*
+                 * An inherited FD is inheritable by default.
+                 * The child process needs to call PR_SetFDInheritable
+                 * to make it non-inheritable if so desired.
+                 */
+                fd->secret->inheritable = _PR_TRI_TRUE;
+            }
+            return fd;
+        }
+        /* Skip three colons */
+        nColons = 0;
+        while (*ptr) {
+            if (*ptr == ':') {
+                if (++nColons == 3) {
+                    break;
+                }
+            }
+            ptr++;
+        }
+        if (*ptr == '\0') {
+            PR_SetError(PR_UNKNOWN_ERROR, 0);
+            return NULL;
+        }
+        ptr++;
+    }
+}
+
+PR_IMPLEMENT(PRProcess*) PR_CreateProcess(
+    const char *path,
+    char *const *argv,
+    char *const *envp,
+    const PRProcessAttr *attr)
+{
+    return _PR_MD_CREATE_PROCESS(path, argv, envp, attr);
+}  /* PR_CreateProcess */
+
+PR_IMPLEMENT(PRStatus) PR_CreateProcessDetached(
+    const char *path,
+    char *const *argv,
+    char *const *envp,
+    const PRProcessAttr *attr)
+{
+    PRProcess *process;
+    PRStatus rv;
+
+    process = PR_CreateProcess(path, argv, envp, attr);
+    if (NULL == process) {
+        return PR_FAILURE;
+    }
+    rv = PR_DetachProcess(process);
+    PR_ASSERT(PR_SUCCESS == rv);
+    if (rv == PR_FAILURE) {
+        PR_DELETE(process);
+        return PR_FAILURE;
+    }
+    return PR_SUCCESS;
+}
+
+PR_IMPLEMENT(PRStatus) PR_DetachProcess(PRProcess *process)
+{
+    return _PR_MD_DETACH_PROCESS(process);
+}
+
+PR_IMPLEMENT(PRStatus) PR_WaitProcess(PRProcess *process, PRInt32 *exitCode)
+{
+    return _PR_MD_WAIT_PROCESS(process, exitCode);
+}  /* PR_WaitProcess */
+
+PR_IMPLEMENT(PRStatus) PR_KillProcess(PRProcess *process)
+{
+    return _PR_MD_KILL_PROCESS(process);
+}
+
+/*
+ ********************************************************************
+ *
+ * Module initialization
+ *
+ ********************************************************************
+ */
+
+static struct {
+    PRLock *ml;
+    PRCondVar *cv;
+} mod_init;
+
+static void _PR_InitCallOnce(void) {
+    mod_init.ml = PR_NewLock();
+    PR_ASSERT(NULL != mod_init.ml);
+    mod_init.cv = PR_NewCondVar(mod_init.ml);
+    PR_ASSERT(NULL != mod_init.cv);
+}
+
+void _PR_CleanupCallOnce()
+{
+    PR_DestroyLock(mod_init.ml);
+    mod_init.ml = NULL;
+    PR_DestroyCondVar(mod_init.cv);
+    mod_init.cv = NULL;
+}
+
+PR_IMPLEMENT(PRStatus) PR_CallOnce(
+    PRCallOnceType *once,
+    PRCallOnceFN    func)
+{
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    PR_Lock(mod_init.ml);
+    PRIntn initialized = once->initialized;
+    PRStatus status = once->status;
+    PR_Unlock(mod_init.ml);
+    if (!initialized) {
+        if (PR_ATOMIC_SET(&once->inProgress, 1) == 0) {
+            status = (*func)();
+            PR_Lock(mod_init.ml);
+            once->status = status;
+            once->initialized = 1;
+            PR_NotifyAllCondVar(mod_init.cv);
+            PR_Unlock(mod_init.ml);
+        } else {
+            PR_Lock(mod_init.ml);
+            while (!once->initialized) {
+                PR_WaitCondVar(mod_init.cv, PR_INTERVAL_NO_TIMEOUT);
+            }
+            status = once->status;
+            PR_Unlock(mod_init.ml);
+            if (PR_SUCCESS != status) {
+                PR_SetError(PR_CALL_ONCE_ERROR, 0);
+            }
+        }
+        return status;
+    }
+    if (PR_SUCCESS != status) {
+        PR_SetError(PR_CALL_ONCE_ERROR, 0);
+    }
+    return status;
+}
+
+PR_IMPLEMENT(PRStatus) PR_CallOnceWithArg(
+    PRCallOnceType      *once,
+    PRCallOnceWithArgFN  func,
+    void                *arg)
+{
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    PR_Lock(mod_init.ml);
+    PRIntn initialized = once->initialized;
+    PRStatus status = once->status;
+    PR_Unlock(mod_init.ml);
+    if (!initialized) {
+        if (PR_ATOMIC_SET(&once->inProgress, 1) == 0) {
+            status = (*func)(arg);
+            PR_Lock(mod_init.ml);
+            once->status = status;
+            once->initialized = 1;
+            PR_NotifyAllCondVar(mod_init.cv);
+            PR_Unlock(mod_init.ml);
+        } else {
+            PR_Lock(mod_init.ml);
+            while (!once->initialized) {
+                PR_WaitCondVar(mod_init.cv, PR_INTERVAL_NO_TIMEOUT);
+            }
+            status = once->status;
+            PR_Unlock(mod_init.ml);
+            if (PR_SUCCESS != status) {
+                PR_SetError(PR_CALL_ONCE_ERROR, 0);
+            }
+        }
+        return status;
+    }
+    if (PR_SUCCESS != status) {
+        PR_SetError(PR_CALL_ONCE_ERROR, 0);
+    }
+    return status;
+}
+
+PRBool _PR_Obsolete(const char *obsolete, const char *preferred)
+{
+#if defined(DEBUG)
+    PR_fprintf(
+        PR_STDERR, "'%s' is obsolete. Use '%s' instead.\n",
+        obsolete, (NULL == preferred) ? "something else" : preferred);
+#endif
+    return PR_FALSE;
+}  /* _PR_Obsolete */
+
+/* prinit.c */
+
+
diff --git a/nsprpub/pr/src/misc/prinrval.c b/nsprpub/pr/src/misc/prinrval.c
new file mode 100644
index 0000000000..79ff2cbca4
--- /dev/null
+++ b/nsprpub/pr/src/misc/prinrval.c
@@ -0,0 +1,122 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * file:            prinrval.c
+ * description:     implementation for the kernel interval timing functions
+ */
+
+#include "primpl.h"
+
+/*
+ *-----------------------------------------------------------------------
+ *
+ * _PR_InitClock --
+ *
+ *
+ *-----------------------------------------------------------------------
+ */
+
+void _PR_InitClock(void)
+{
+    _PR_MD_INTERVAL_INIT();
+#ifdef DEBUG
+    {
+        PRIntervalTime ticksPerSec = PR_TicksPerSecond();
+
+        PR_ASSERT(ticksPerSec >= PR_INTERVAL_MIN);
+        PR_ASSERT(ticksPerSec <= PR_INTERVAL_MAX);
+    }
+#endif /* DEBUG */
+}
+
+PR_IMPLEMENT(PRIntervalTime) PR_IntervalNow(void)
+{
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+    return _PR_MD_GET_INTERVAL();
+}  /* PR_IntervalNow */
+
+PR_EXTERN(PRUint32) PR_TicksPerSecond(void)
+{
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+    return _PR_MD_INTERVAL_PER_SEC();
+}  /* PR_TicksPerSecond */
+
+PR_IMPLEMENT(PRIntervalTime) PR_SecondsToInterval(PRUint32 seconds)
+{
+    return seconds * PR_TicksPerSecond();
+}  /* PR_SecondsToInterval */
+
+PR_IMPLEMENT(PRIntervalTime) PR_MillisecondsToInterval(PRUint32 milli)
+{
+    PRIntervalTime ticks;
+    PRUint64 tock, tps, msecPerSec, rounding;
+    LL_UI2L(tock, milli);
+    LL_I2L(msecPerSec, PR_MSEC_PER_SEC);
+    LL_I2L(rounding, (PR_MSEC_PER_SEC >> 1));
+    LL_I2L(tps, PR_TicksPerSecond());
+    LL_MUL(tock, tock, tps);
+    LL_ADD(tock, tock, rounding);
+    LL_DIV(tock, tock, msecPerSec);
+    LL_L2UI(ticks, tock);
+    return ticks;
+}  /* PR_MillisecondsToInterval */
+
+PR_IMPLEMENT(PRIntervalTime) PR_MicrosecondsToInterval(PRUint32 micro)
+{
+    PRIntervalTime ticks;
+    PRUint64 tock, tps, usecPerSec, rounding;
+    LL_UI2L(tock, micro);
+    LL_I2L(usecPerSec, PR_USEC_PER_SEC);
+    LL_I2L(rounding, (PR_USEC_PER_SEC >> 1));
+    LL_I2L(tps, PR_TicksPerSecond());
+    LL_MUL(tock, tock, tps);
+    LL_ADD(tock, tock, rounding);
+    LL_DIV(tock, tock, usecPerSec);
+    LL_L2UI(ticks, tock);
+    return ticks;
+}  /* PR_MicrosecondsToInterval */
+
+PR_IMPLEMENT(PRUint32) PR_IntervalToSeconds(PRIntervalTime ticks)
+{
+    return ticks / PR_TicksPerSecond();
+}  /* PR_IntervalToSeconds */
+
+PR_IMPLEMENT(PRUint32) PR_IntervalToMilliseconds(PRIntervalTime ticks)
+{
+    PRUint32 milli;
+    PRUint64 tock, tps, msecPerSec, rounding;
+    LL_UI2L(tock, ticks);
+    LL_I2L(msecPerSec, PR_MSEC_PER_SEC);
+    LL_I2L(tps, PR_TicksPerSecond());
+    LL_USHR(rounding, tps, 1);
+    LL_MUL(tock, tock, msecPerSec);
+    LL_ADD(tock, tock, rounding);
+    LL_DIV(tock, tock, tps);
+    LL_L2UI(milli, tock);
+    return milli;
+}  /* PR_IntervalToMilliseconds */
+
+PR_IMPLEMENT(PRUint32) PR_IntervalToMicroseconds(PRIntervalTime ticks)
+{
+    PRUint32 micro;
+    PRUint64 tock, tps, usecPerSec, rounding;
+    LL_UI2L(tock, ticks);
+    LL_I2L(usecPerSec, PR_USEC_PER_SEC);
+    LL_I2L(tps, PR_TicksPerSecond());
+    LL_USHR(rounding, tps, 1);
+    LL_MUL(tock, tock, usecPerSec);
+    LL_ADD(tock, tock, rounding);
+    LL_DIV(tock, tock, tps);
+    LL_L2UI(micro, tock);
+    return micro;
+}  /* PR_IntervalToMicroseconds */
+
+/* prinrval.c */
+
diff --git a/nsprpub/pr/src/misc/pripc.c b/nsprpub/pr/src/misc/pripc.c
new file mode 100644
index 0000000000..64415dd631
--- /dev/null
+++ b/nsprpub/pr/src/misc/pripc.c
@@ -0,0 +1,100 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * File: pripc.c
+ *
+ * Description: functions for IPC support
+ */
+
+#include "primpl.h"
+
+#include <string.h>
+
+/*
+ * A POSIX IPC name must begin with a '/'.
+ * A POSIX IPC name on Solaris cannot contain any '/' except
+ * the required leading '/'.
+ * A POSIX IPC name on HP-UX must be a valid pathname
+ * in the file system.
+ *
+ * The ftok() function for System V IPC requires a valid pathname
+ * in the file system.
+ *
+ * A Win32 IPC name cannot contain '\'.
+ */
+
+static void _pr_ConvertSemName(char *result)
+{
+#ifdef _PR_HAVE_POSIX_SEMAPHORES
+#if defined(SOLARIS)
+    char *p;
+
+    /* Convert '/' to '_' except for the leading '/' */
+    for (p = result+1; *p; p++) {
+        if (*p == '/') {
+            *p = '_';
+        }
+    }
+    return;
+#else
+    return;
+#endif
+#elif defined(_PR_HAVE_SYSV_SEMAPHORES)
+    return;
+#elif defined(WIN32)
+    return;
+#endif
+}
+
+static void _pr_ConvertShmName(char *result)
+{
+#if defined(PR_HAVE_POSIX_NAMED_SHARED_MEMORY)
+#if defined(SOLARIS)
+    char *p;
+
+    /* Convert '/' to '_' except for the leading '/' */
+    for (p = result+1; *p; p++) {
+        if (*p == '/') {
+            *p = '_';
+        }
+    }
+    return;
+#else
+    return;
+#endif
+#elif defined(PR_HAVE_SYSV_NAMED_SHARED_MEMORY)
+    return;
+#elif defined(WIN32)
+    return;
+#else
+    return;
+#endif
+}
+
+PRStatus _PR_MakeNativeIPCName(
+    const char *name,
+    char *result,
+    PRIntn size,
+    _PRIPCType type)
+{
+    if (strlen(name) >= (PRSize)size) {
+        PR_SetError(PR_BUFFER_OVERFLOW_ERROR, 0);
+        return PR_FAILURE;
+    }
+    strcpy(result, name);
+    switch (type) {
+        case _PRIPCSem:
+            _pr_ConvertSemName(result);
+            break;
+        case _PRIPCShm:
+            _pr_ConvertShmName(result);
+            break;
+        default:
+            PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+            return PR_FAILURE;
+    }
+    return PR_SUCCESS;
+}
diff --git a/nsprpub/pr/src/misc/pripcsem.c b/nsprpub/pr/src/misc/pripcsem.c
new file mode 100644
index 0000000000..49b051b74d
--- /dev/null
+++ b/nsprpub/pr/src/misc/pripcsem.c
@@ -0,0 +1,102 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * File: pripcsem.c
+ *
+ * Description: implements the named semaphores API in prsemipc.h
+ * for classic NSPR.  If _PR_HAVE_NAMED_SEMAPHORES is not defined,
+ * the named semaphore functions all fail with the error code
+ * PR_NOT_IMPLEMENTED_ERROR.
+ */
+
+#include "primpl.h"
+
+#ifdef _PR_PTHREADS
+
+#error "This file should not be compiled for the pthreads version"
+
+#else
+
+#ifndef _PR_HAVE_NAMED_SEMAPHORES
+
+PRSem * _PR_MD_OPEN_SEMAPHORE(
+    const char *osname, PRIntn flags, PRIntn mode, PRUintn value)
+{
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+    return NULL;
+}
+
+PRStatus _PR_MD_WAIT_SEMAPHORE(PRSem *sem)
+{
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+    return PR_FAILURE;
+}
+
+PRStatus _PR_MD_POST_SEMAPHORE(PRSem *sem)
+{
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+    return PR_FAILURE;
+}
+
+PRStatus _PR_MD_CLOSE_SEMAPHORE(PRSem *sem)
+{
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+    return PR_FAILURE;
+}
+
+PRStatus _PR_MD_DELETE_SEMAPHORE(const char *osname)
+{
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+    return PR_FAILURE;
+}
+
+#endif /* !_PR_HAVE_NAMED_SEMAPHORES */
+
+PR_IMPLEMENT(PRSem *) PR_OpenSemaphore(
+    const char *name, PRIntn flags, PRIntn mode, PRUintn value)
+{
+    char osname[PR_IPC_NAME_SIZE];
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+    if (_PR_MakeNativeIPCName(name, osname, sizeof(osname), _PRIPCSem)
+        == PR_FAILURE) {
+        return NULL;
+    }
+    return _PR_MD_OPEN_SEMAPHORE(osname, flags, mode, value);
+}
+
+PR_IMPLEMENT(PRStatus) PR_WaitSemaphore(PRSem *sem)
+{
+    return _PR_MD_WAIT_SEMAPHORE(sem);
+}
+
+PR_IMPLEMENT(PRStatus) PR_PostSemaphore(PRSem *sem)
+{
+    return _PR_MD_POST_SEMAPHORE(sem);
+}
+
+PR_IMPLEMENT(PRStatus) PR_CloseSemaphore(PRSem *sem)
+{
+    return _PR_MD_CLOSE_SEMAPHORE(sem);
+}
+
+PR_IMPLEMENT(PRStatus) PR_DeleteSemaphore(const char *name)
+{
+    char osname[PR_IPC_NAME_SIZE];
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+    if (_PR_MakeNativeIPCName(name, osname, sizeof(osname), _PRIPCSem)
+        == PR_FAILURE) {
+        return PR_FAILURE;
+    }
+    return _PR_MD_DELETE_SEMAPHORE(osname);
+}
+
+#endif /* _PR_PTHREADS */
diff --git a/nsprpub/pr/src/misc/prlog2.c b/nsprpub/pr/src/misc/prlog2.c
new file mode 100644
index 0000000000..2d476cd711
--- /dev/null
+++ b/nsprpub/pr/src/misc/prlog2.c
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "prbit.h"
+
+/*
+** Compute the log of the least power of 2 greater than or equal to n
+*/
+PR_IMPLEMENT(PRIntn) PR_CeilingLog2(PRUint32 n)
+{
+    PRIntn log2;
+    PR_CEILING_LOG2(log2, n);
+    return log2;
+}
+
+/*
+** Compute the log of the greatest power of 2 less than or equal to n.
+** This really just finds the highest set bit in the word.
+*/
+PR_IMPLEMENT(PRIntn) PR_FloorLog2(PRUint32 n)
+{
+    PRIntn log2;
+    PR_FLOOR_LOG2(log2, n);
+    return log2;
+}
diff --git a/nsprpub/pr/src/misc/prlong.c b/nsprpub/pr/src/misc/prlong.c
new file mode 100644
index 0000000000..9c5abf06bb
--- /dev/null
+++ b/nsprpub/pr/src/misc/prlong.c
@@ -0,0 +1,254 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "prlong.h"
+
+static PRInt64 ll_zero = PR_INT64(0x0000000000000000);
+static PRInt64 ll_maxint = PR_INT64(0x7fffffffffffffff);
+static PRInt64 ll_minint = PR_INT64(0x8000000000000000);
+static PRUint64 ll_maxuint = PR_UINT64(0xffffffffffffffff);
+
+PR_IMPLEMENT(PRInt64) LL_Zero(void) {
+    return ll_zero;
+}
+PR_IMPLEMENT(PRInt64) LL_MaxInt(void) {
+    return ll_maxint;
+}
+PR_IMPLEMENT(PRInt64) LL_MinInt(void) {
+    return ll_minint;
+}
+PR_IMPLEMENT(PRUint64) LL_MaxUint(void) {
+    return ll_maxuint;
+}
+
+#ifndef HAVE_LONG_LONG
+/*
+** Divide 64-bit a by 32-bit b, which must be normalized so its high bit is 1.
+*/
+static void norm_udivmod32(PRUint32 *qp, PRUint32 *rp, PRUint64 a, PRUint32 b)
+{
+    PRUint32 d1, d0, q1, q0;
+    PRUint32 r1, r0, m;
+
+    d1 = _hi16(b);
+    d0 = _lo16(b);
+    r1 = a.hi % d1;
+    q1 = a.hi / d1;
+    m = q1 * d0;
+    r1 = (r1 << 16) | _hi16(a.lo);
+    if (r1 < m) {
+        q1--, r1 += b;
+        if (r1 >= b /* i.e., we didn't get a carry when adding to r1 */
+            && r1 < m) {
+            q1--, r1 += b;
+        }
+    }
+    r1 -= m;
+    r0 = r1 % d1;
+    q0 = r1 / d1;
+    m = q0 * d0;
+    r0 = (r0 << 16) | _lo16(a.lo);
+    if (r0 < m) {
+        q0--, r0 += b;
+        if (r0 >= b
+            && r0 < m) {
+            q0--, r0 += b;
+        }
+    }
+    *qp = (q1 << 16) | q0;
+    *rp = r0 - m;
+}
+
+static PRUint32 CountLeadingZeros(PRUint32 a)
+{
+    PRUint32 t;
+    PRUint32 r = 32;
+
+    if ((t = a >> 16) != 0) {
+        r -= 16, a = t;
+    }
+    if ((t = a >> 8) != 0) {
+        r -= 8, a = t;
+    }
+    if ((t = a >> 4) != 0) {
+        r -= 4, a = t;
+    }
+    if ((t = a >> 2) != 0) {
+        r -= 2, a = t;
+    }
+    if ((t = a >> 1) != 0) {
+        r -= 1, a = t;
+    }
+    if (a & 1) {
+        r--;
+    }
+    return r;
+}
+
+PR_IMPLEMENT(void) ll_udivmod(PRUint64 *qp, PRUint64 *rp, PRUint64 a, PRUint64 b)
+{
+    PRUint32 n0, n1, n2;
+    PRUint32 q0, q1;
+    PRUint32 rsh, lsh;
+
+    n0 = a.lo;
+    n1 = a.hi;
+
+    if (b.hi == 0) {
+        if (b.lo > n1) {
+            /* (0 q0) = (n1 n0) / (0 D0) */
+
+            lsh = CountLeadingZeros(b.lo);
+
+            if (lsh) {
+                /*
+                 * Normalize, i.e. make the most significant bit of the
+                 * denominator be set.
+                 */
+                b.lo = b.lo << lsh;
+                n1 = (n1 << lsh) | (n0 >> (32 - lsh));
+                n0 = n0 << lsh;
+            }
+
+            a.lo = n0, a.hi = n1;
+            norm_udivmod32(&q0, &n0, a, b.lo);
+            q1 = 0;
+
+            /* remainder is in n0 >> lsh */
+        } else {
+            /* (q1 q0) = (n1 n0) / (0 d0) */
+
+            if (b.lo == 0) {    /* user wants to divide by zero! */
+                b.lo = 1 / b.lo;    /* so go ahead and crash */
+            }
+
+            lsh = CountLeadingZeros(b.lo);
+
+            if (lsh == 0) {
+                /*
+                 * From (n1 >= b.lo)
+                 *   && (the most significant bit of b.lo is set),
+                 * conclude that
+                 *  (the most significant bit of n1 is set)
+                 *   && (the leading quotient digit q1 = 1).
+                 *
+                 * This special case is necessary, not an optimization
+                 * (Shifts counts of 32 are undefined).
+                 */
+                n1 -= b.lo;
+                q1 = 1;
+            } else {
+                /*
+                 * Normalize.
+                 */
+                rsh = 32 - lsh;
+
+                b.lo = b.lo << lsh;
+                n2 = n1 >> rsh;
+                n1 = (n1 << lsh) | (n0 >> rsh);
+                n0 = n0 << lsh;
+
+                a.lo = n1, a.hi = n2;
+                norm_udivmod32(&q1, &n1, a, b.lo);
+            }
+
+            /* n1 != b.lo... */
+
+            a.lo = n0, a.hi = n1;
+            norm_udivmod32(&q0, &n0, a, b.lo);
+
+            /* remainder in n0 >> lsh */
+        }
+
+        if (rp) {
+            rp->lo = n0 >> lsh;
+            rp->hi = 0;
+        }
+    } else {
+        if (b.hi > n1) {
+            /* (0 0) = (n1 n0) / (D1 d0) */
+
+            q0 = 0;
+            q1 = 0;
+
+            /* remainder in (n1 n0) */
+            if (rp) {
+                rp->lo = n0;
+                rp->hi = n1;
+            }
+        } else {
+            /* (0 q0) = (n1 n0) / (d1 d0) */
+
+            lsh = CountLeadingZeros(b.hi);
+            if (lsh == 0) {
+                /*
+                 * From (n1 >= b.hi)
+                 *   && (the most significant bit of b.hi is set),
+                 * conclude that
+                 *      (the most significant bit of n1 is set)
+                 *   && (the quotient digit q0 = 0 or 1).
+                 *
+                 * This special case is necessary, not an optimization.
+                 */
+
+                /*
+                 * The condition on the next line takes advantage of that
+                 * n1 >= b.hi (true due to control flow).
+                 */
+                if (n1 > b.hi || n0 >= b.lo) {
+                    q0 = 1;
+                    a.lo = n0, a.hi = n1;
+                    LL_SUB(a, a, b);
+                } else {
+                    q0 = 0;
+                }
+                q1 = 0;
+
+                if (rp) {
+                    rp->lo = n0;
+                    rp->hi = n1;
+                }
+            } else {
+                PRInt64 m;
+
+                /*
+                 * Normalize.
+                 */
+                rsh = 32 - lsh;
+
+                b.hi = (b.hi << lsh) | (b.lo >> rsh);
+                b.lo = b.lo << lsh;
+                n2 = n1 >> rsh;
+                n1 = (n1 << lsh) | (n0 >> rsh);
+                n0 = n0 << lsh;
+
+                a.lo = n1, a.hi = n2;
+                norm_udivmod32(&q0, &n1, a, b.hi);
+                LL_MUL32(m, q0, b.lo);
+
+                if ((m.hi > n1) || ((m.hi == n1) && (m.lo > n0))) {
+                    q0--;
+                    LL_SUB(m, m, b);
+                }
+
+                q1 = 0;
+
+                /* Remainder is ((n1 n0) - (m1 m0)) >> lsh */
+                if (rp) {
+                    a.lo = n0, a.hi = n1;
+                    LL_SUB(a, a, m);
+                    rp->lo = (a.hi << rsh) | (a.lo >> lsh);
+                    rp->hi = a.hi >> lsh;
+                }
+            }
+        }
+    }
+
+    if (qp) {
+        qp->lo = q0;
+        qp->hi = q1;
+    }
+}
+#endif /* !HAVE_LONG_LONG */
diff --git a/nsprpub/pr/src/misc/prnetdb.c b/nsprpub/pr/src/misc/prnetdb.c
new file mode 100644
index 0000000000..7decd96751
--- /dev/null
+++ b/nsprpub/pr/src/misc/prnetdb.c
@@ -0,0 +1,2549 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "primpl.h"
+
+#include <string.h>
+
+#if defined(LINUX)
+#include <sys/un.h>
+#endif
+
+/*
+ * On Unix, the error code for gethostbyname() and gethostbyaddr()
+ * is returned in the global variable h_errno, instead of the usual
+ * errno.
+ */
+#if defined(XP_UNIX)
+#if defined(_PR_NEED_H_ERRNO)
+extern int h_errno;
+#endif
+#define _MD_GETHOST_ERRNO() h_errno
+#else
+#define _MD_GETHOST_ERRNO() _MD_ERRNO()
+#endif
+
+/*
+ * The meaning of the macros related to gethostbyname, gethostbyaddr,
+ * and gethostbyname2 is defined below.
+ * - _PR_HAVE_THREADSAFE_GETHOST: the gethostbyXXX functions return
+ *   the result in thread specific storage.  For example, AIX, HP-UX.
+ * -  _PR_HAVE_GETHOST_R: have the gethostbyXXX_r functions. See next
+ *   two macros.
+ * - _PR_HAVE_GETHOST_R_INT: the gethostbyXXX_r functions return an
+ *   int.  For example, Linux glibc.
+ * - _PR_HAVE_GETHOST_R_POINTER: the gethostbyXXX_r functions return
+ *   a struct hostent* pointer.  For example, Solaris.
+ */
+#if defined(_PR_NO_PREEMPT) || defined(_PR_HAVE_GETHOST_R) \
+    || defined(_PR_HAVE_THREADSAFE_GETHOST)
+#define _PR_NO_DNS_LOCK
+#endif
+
+#if defined(_PR_NO_DNS_LOCK)
+#define LOCK_DNS()
+#define UNLOCK_DNS()
+#else
+PRLock *_pr_dnsLock = NULL;
+#define LOCK_DNS() PR_Lock(_pr_dnsLock)
+#define UNLOCK_DNS() PR_Unlock(_pr_dnsLock)
+#endif  /* defined(_PR_NO_DNS_LOCK) */
+
+/*
+ * Some platforms have the reentrant getprotobyname_r() and
+ * getprotobynumber_r().  However, they come in three flavors.
+ * Some return a pointer to struct protoent, others return
+ * an int, and glibc's flavor takes five arguments.
+ */
+
+#if defined(SOLARIS) || (defined(BSDI) && defined(_REENTRANT)) \
+    || (defined(LINUX) && defined(_REENTRANT) \
+        && defined(__GLIBC__) && __GLIBC__ < 2)
+#define _PR_HAVE_GETPROTO_R
+#define _PR_HAVE_GETPROTO_R_POINTER
+#endif
+
+#if defined(AIX4_3_PLUS) || (defined(AIX) && defined(_THREAD_SAFE)) \
+    || (defined(HPUX10_10) && defined(_REENTRANT)) \
+        || (defined(HPUX10_20) && defined(_REENTRANT)) \
+        || defined(OPENBSD)
+#define _PR_HAVE_GETPROTO_R
+#define _PR_HAVE_GETPROTO_R_INT
+#endif
+
+#if __FreeBSD_version >= 602000
+#define _PR_HAVE_GETPROTO_R
+#define _PR_HAVE_5_ARG_GETPROTO_R
+#endif
+
+/* BeOS has glibc but not the glibc-style getprotobyxxx_r functions. */
+#if (defined(__GLIBC__) && __GLIBC__ >= 2)
+#define _PR_HAVE_GETPROTO_R
+#define _PR_HAVE_5_ARG_GETPROTO_R
+#endif
+
+#if !defined(_PR_HAVE_GETPROTO_R)
+PRLock* _getproto_lock = NULL;
+#endif
+
+#if defined(_PR_INET6_PROBE)
+extern PRBool _pr_ipv6_is_present(void);
+#endif
+
+#define _PR_IN6_IS_ADDR_UNSPECIFIED(a)              \
+                (((a)->pr_s6_addr32[0] == 0) && \
+                ((a)->pr_s6_addr32[1] == 0) &&      \
+                ((a)->pr_s6_addr32[2] == 0) &&      \
+                ((a)->pr_s6_addr32[3] == 0))
+
+#define _PR_IN6_IS_ADDR_LOOPBACK(a)                 \
+               (((a)->pr_s6_addr32[0] == 0) &&  \
+               ((a)->pr_s6_addr32[1] == 0)      &&  \
+               ((a)->pr_s6_addr32[2] == 0)      &&  \
+               ((a)->pr_s6_addr[12] == 0)       &&  \
+               ((a)->pr_s6_addr[13] == 0)       &&  \
+               ((a)->pr_s6_addr[14] == 0)       &&  \
+               ((a)->pr_s6_addr[15] == 0x1U))
+
+const PRIPv6Addr _pr_in6addr_any =  {{{
+            0, 0, 0, 0,
+            0, 0, 0, 0,
+            0, 0, 0, 0,
+            0, 0, 0, 0
+        }
+    }
+};
+
+const PRIPv6Addr _pr_in6addr_loopback = {{{
+            0, 0, 0, 0,
+            0, 0, 0, 0,
+            0, 0, 0, 0,
+            0, 0, 0, 0x1U
+        }
+    }
+};
+/*
+ * The values at bytes 10 and 11 are compared using pointers to
+ * 8-bit fields, and not 32-bit fields, to make the comparison work on
+ * both big-endian and little-endian systems
+ */
+
+#define _PR_IN6_IS_ADDR_V4MAPPED(a)         \
+        (((a)->pr_s6_addr32[0] == 0)    &&  \
+        ((a)->pr_s6_addr32[1] == 0) &&  \
+        ((a)->pr_s6_addr[8] == 0)       &&  \
+        ((a)->pr_s6_addr[9] == 0)       &&  \
+        ((a)->pr_s6_addr[10] == 0xff)   &&  \
+        ((a)->pr_s6_addr[11] == 0xff))
+
+#define _PR_IN6_IS_ADDR_V4COMPAT(a)         \
+        (((a)->pr_s6_addr32[0] == 0) && \
+        ((a)->pr_s6_addr32[1] == 0) &&      \
+        ((a)->pr_s6_addr32[2] == 0))
+
+#define _PR_IN6_V4MAPPED_TO_IPADDR(a) ((a)->pr_s6_addr32[3])
+
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
+
+/*
+ * The _pr_QueryNetIfs() function finds out if the system has
+ * IPv4 or IPv6 source addresses configured and sets _pr_have_inet_if
+ * and _pr_have_inet6_if accordingly.
+ *
+ * We have an implementation using SIOCGIFCONF ioctl and a
+ * default implementation that simply sets _pr_have_inet_if
+ * and _pr_have_inet6_if to true.  A better implementation
+ * would be to use the routing sockets (see Chapter 17 of
+ * W. Richard Stevens' Unix Network Programming, Vol. 1, 2nd. Ed.)
+ */
+
+static PRLock *_pr_query_ifs_lock = NULL;
+static PRBool _pr_have_inet_if = PR_FALSE;
+static PRBool _pr_have_inet6_if = PR_FALSE;
+
+#undef DEBUG_QUERY_IFS
+
+#if defined(AIX) \
+    || (defined(DARWIN) && !defined(HAVE_GETIFADDRS))
+
+/*
+ * Use SIOCGIFCONF ioctl on platforms that don't have routing
+ * sockets.  Warning: whether SIOCGIFCONF ioctl returns AF_INET6
+ * network interfaces is not portable.
+ *
+ * The _pr_QueryNetIfs() function is derived from the code in
+ * src/lib/libc/net/getifaddrs.c in BSD Unix and the code in
+ * Section 16.6 of W. Richard Stevens' Unix Network Programming,
+ * Vol. 1, 2nd. Ed.
+ */
+
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <net/if.h>
+
+#ifdef DEBUG_QUERY_IFS
+static void
+_pr_PrintIfreq(struct ifreq *ifr)
+{
+    PRNetAddr addr;
+    struct sockaddr *sa;
+    const char* family;
+    char addrstr[64];
+
+    sa = &ifr->ifr_addr;
+    if (sa->sa_family == AF_INET) {
+        struct sockaddr_in *sin = (struct sockaddr_in *)sa;
+        family = "inet";
+        memcpy(&addr.inet.ip, &sin->sin_addr, sizeof(sin->sin_addr));
+    } else if (sa->sa_family == AF_INET6) {
+        struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
+        family = "inet6";
+        memcpy(&addr.ipv6.ip, &sin6->sin6_addr, sizeof(sin6->sin6_addr));
+    } else {
+        return;  /* skip if not AF_INET or AF_INET6 */
+    }
+    addr.raw.family = sa->sa_family;
+    PR_NetAddrToString(&addr, addrstr, sizeof(addrstr));
+    printf("%s: %s %s\n", ifr->ifr_name, family, addrstr);
+}
+#endif
+
+static void
+_pr_QueryNetIfs(void)
+{
+    int sock;
+    int rv;
+    struct ifconf ifc;
+    struct ifreq *ifr;
+    struct ifreq *lifr;
+    PRUint32 len, lastlen;
+    char *buf;
+
+    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
+        return;
+    }
+
+    /* Issue SIOCGIFCONF request in a loop. */
+    lastlen = 0;
+    len = 100 * sizeof(struct ifreq);  /* initial buffer size guess */
+    for (;;) {
+        buf = (char *)PR_Malloc(len);
+        if (NULL == buf) {
+            close(sock);
+            return;
+        }
+        ifc.ifc_buf = buf;
+        ifc.ifc_len = len;
+        rv = ioctl(sock, SIOCGIFCONF, &ifc);
+        if (rv < 0) {
+            if (errno != EINVAL || lastlen != 0) {
+                close(sock);
+                PR_Free(buf);
+                return;
+            }
+        } else {
+            if (ifc.ifc_len == lastlen) {
+                break;    /* success, len has not changed */
+            }
+            lastlen = ifc.ifc_len;
+        }
+        len += 10 * sizeof(struct ifreq);  /* increment */
+        PR_Free(buf);
+    }
+    close(sock);
+
+    ifr = ifc.ifc_req;
+    lifr = (struct ifreq *)&ifc.ifc_buf[ifc.ifc_len];
+
+    while (ifr < lifr) {
+        struct sockaddr *sa;
+        int sa_len;
+
+#ifdef DEBUG_QUERY_IFS
+        _pr_PrintIfreq(ifr);
+#endif
+        sa = &ifr->ifr_addr;
+        if (sa->sa_family == AF_INET) {
+            struct sockaddr_in *sin = (struct sockaddr_in *) sa;
+            if (sin->sin_addr.s_addr != htonl(INADDR_LOOPBACK)) {
+                _pr_have_inet_if = PR_TRUE;
+            }
+        } else if (sa->sa_family == AF_INET6) {
+            struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) sa;
+            if (!IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)
+                && !IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
+                _pr_have_inet6_if = PR_TRUE;
+            }
+        }
+
+#ifdef _PR_HAVE_SOCKADDR_LEN
+        sa_len = PR_MAX(sa->sa_len, sizeof(struct sockaddr));
+#else
+        switch (sa->sa_family) {
+#ifdef AF_LINK
+            case AF_LINK:
+                sa_len = sizeof(struct sockaddr_dl);
+                break;
+#endif
+            case AF_INET6:
+                sa_len = sizeof(struct sockaddr_in6);
+                break;
+            default:
+                sa_len = sizeof(struct sockaddr);
+                break;
+        }
+#endif
+        ifr = (struct ifreq *)(((char *)sa) + sa_len);
+    }
+    PR_Free(buf);
+}
+
+#elif (defined(DARWIN) && defined(HAVE_GETIFADDRS)) || defined(FREEBSD) \
+    || defined(NETBSD) || defined(OPENBSD)
+
+/*
+ * Use the BSD getifaddrs function.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <ifaddrs.h>
+#include <netinet/in.h>
+
+#ifdef DEBUG_QUERY_IFS
+static void
+_pr_PrintIfaddrs(struct ifaddrs *ifa)
+{
+    struct sockaddr *sa;
+    const char* family;
+    void *addrp;
+    char addrstr[64];
+
+    sa = ifa->ifa_addr;
+    if (sa->sa_family == AF_INET) {
+        struct sockaddr_in *sin = (struct sockaddr_in *)sa;
+        family = "inet";
+        addrp = &sin->sin_addr;
+    } else if (sa->sa_family == AF_INET6) {
+        struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
+        family = "inet6";
+        addrp = &sin6->sin6_addr;
+    } else {
+        return;  /* skip if not AF_INET or AF_INET6 */
+    }
+    inet_ntop(sa->sa_family, addrp, addrstr, sizeof(addrstr));
+    printf("%s: %s %s\n", ifa->ifa_name, family, addrstr);
+}
+#endif
+
+static void
+_pr_QueryNetIfs(void)
+{
+    struct ifaddrs *ifp;
+    struct ifaddrs *ifa;
+
+    if (getifaddrs(&ifp) == -1) {
+        return;
+    }
+    for (ifa = ifp; ifa; ifa = ifa->ifa_next) {
+        struct sockaddr *sa;
+
+#ifdef DEBUG_QUERY_IFS
+        _pr_PrintIfaddrs(ifa);
+#endif
+        sa = ifa->ifa_addr;
+        if (sa->sa_family == AF_INET) {
+            struct sockaddr_in *sin = (struct sockaddr_in *) sa;
+            if (sin->sin_addr.s_addr != htonl(INADDR_LOOPBACK)) {
+                _pr_have_inet_if = 1;
+            }
+        } else if (sa->sa_family == AF_INET6) {
+            struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) sa;
+            if (!IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)
+                && !IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
+                _pr_have_inet6_if = 1;
+            }
+        }
+    }
+    freeifaddrs(ifp);
+}
+
+#else  /* default */
+
+/*
+ * Emulate the code in NSPR 4.2 or older.  PR_GetIPNodeByName behaves
+ * as if the system had both IPv4 and IPv6 source addresses configured.
+ */
+static void
+_pr_QueryNetIfs(void)
+{
+    _pr_have_inet_if = PR_TRUE;
+    _pr_have_inet6_if = PR_TRUE;
+}
+
+#endif
+
+#endif  /* _PR_INET6 && _PR_HAVE_GETHOSTBYNAME2 */
+
+void _PR_InitNet(void)
+{
+#if defined(XP_UNIX)
+#ifdef HAVE_NETCONFIG
+    /*
+     * This one-liner prevents the endless re-open's and re-read's of
+     * /etc/netconfig on EACH and EVERY call to accept(), connect(), etc.
+     */
+    (void)setnetconfig();
+#endif
+#endif
+#if !defined(_PR_NO_DNS_LOCK)
+    _pr_dnsLock = PR_NewLock();
+#endif
+#if !defined(_PR_HAVE_GETPROTO_R)
+    _getproto_lock = PR_NewLock();
+#endif
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
+    _pr_query_ifs_lock = PR_NewLock();
+#endif
+}
+
+void _PR_CleanupNet(void)
+{
+#if !defined(_PR_NO_DNS_LOCK)
+    if (_pr_dnsLock) {
+        PR_DestroyLock(_pr_dnsLock);
+        _pr_dnsLock = NULL;
+    }
+#endif
+#if !defined(_PR_HAVE_GETPROTO_R)
+    if (_getproto_lock) {
+        PR_DestroyLock(_getproto_lock);
+        _getproto_lock = NULL;
+    }
+#endif
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
+    if (_pr_query_ifs_lock) {
+        PR_DestroyLock(_pr_query_ifs_lock);
+        _pr_query_ifs_lock = NULL;
+    }
+#endif
+}
+
+/*
+** Allocate space from the buffer, aligning it to "align" before doing
+** the allocation. "align" must be a power of 2.
+*/
+static char *Alloc(PRIntn amount, char **bufp, PRIntn *buflenp, PRIntn align)
+{
+    char *buf = *bufp;
+    PRIntn buflen = *buflenp;
+
+    if (align && ((long)buf & (align - 1))) {
+        PRIntn skip = align - ((ptrdiff_t)buf & (align - 1));
+        if (buflen < skip) {
+            return 0;
+        }
+        buf += skip;
+        buflen -= skip;
+    }
+    if (buflen < amount) {
+        return 0;
+    }
+    *bufp = buf + amount;
+    *buflenp = buflen - amount;
+    return buf;
+}
+
+typedef enum _PRIPAddrConversion {
+    _PRIPAddrNoConversion,
+    _PRIPAddrIPv4Mapped,
+    _PRIPAddrIPv4Compat
+} _PRIPAddrConversion;
+
+/*
+** Convert an IPv4 address (v4) to an IPv4-mapped IPv6 address (v6).
+*/
+static void MakeIPv4MappedAddr(const char *v4, char *v6)
+{
+    memset(v6, 0, 10);
+    memset(v6 + 10, 0xff, 2);
+    memcpy(v6 + 12, v4, 4);
+}
+
+/*
+** Convert an IPv4 address (v4) to an IPv4-compatible IPv6 address (v6).
+*/
+static void MakeIPv4CompatAddr(const char *v4, char *v6)
+{
+    memset(v6, 0, 12);
+    memcpy(v6 + 12, v4, 4);
+}
+
+/*
+** Copy a hostent, and all of the memory that it refers to into
+** (hopefully) stacked buffers.
+*/
+static PRStatus CopyHostent(
+    struct hostent *from,
+    char **buf,
+    PRIntn *bufsize,
+    _PRIPAddrConversion conversion,
+    PRHostEnt *to)
+{
+    PRIntn len, na;
+    char **ap;
+
+    if (conversion != _PRIPAddrNoConversion
+        && from->h_addrtype == AF_INET) {
+        PR_ASSERT(from->h_length == 4);
+        to->h_addrtype = PR_AF_INET6;
+        to->h_length = 16;
+    } else {
+#if defined(_PR_INET6) || defined(_PR_INET6_PROBE)
+        if (AF_INET6 == from->h_addrtype) {
+            to->h_addrtype = PR_AF_INET6;
+        }
+        else
+#endif
+            to->h_addrtype = from->h_addrtype;
+        to->h_length = from->h_length;
+    }
+
+    /* Copy the official name */
+    if (!from->h_name) {
+        return PR_FAILURE;
+    }
+    len = strlen(from->h_name) + 1;
+    to->h_name = Alloc(len, buf, bufsize, 0);
+    if (!to->h_name) {
+        return PR_FAILURE;
+    }
+    memcpy(to->h_name, from->h_name, len);
+
+    /* Count the aliases, then allocate storage for the pointers */
+    if (!from->h_aliases) {
+        na = 1;
+    } else {
+        for (na = 1, ap = from->h_aliases; *ap != 0; na++, ap++) {;} /* nothing to execute */
+    }
+    to->h_aliases = (char**)Alloc(
+                        na * sizeof(char*), buf, bufsize, sizeof(char**));
+    if (!to->h_aliases) {
+        return PR_FAILURE;
+    }
+
+    /* Copy the aliases, one at a time */
+    if (!from->h_aliases) {
+        to->h_aliases[0] = 0;
+    } else {
+        for (na = 0, ap = from->h_aliases; *ap != 0; na++, ap++) {
+            len = strlen(*ap) + 1;
+            to->h_aliases[na] = Alloc(len, buf, bufsize, 0);
+            if (!to->h_aliases[na]) {
+                return PR_FAILURE;
+            }
+            memcpy(to->h_aliases[na], *ap, len);
+        }
+        to->h_aliases[na] = 0;
+    }
+
+    /* Count the addresses, then allocate storage for the pointers */
+    for (na = 1, ap = from->h_addr_list; *ap != 0; na++, ap++) {;} /* nothing to execute */
+    to->h_addr_list = (char**)Alloc(
+                          na * sizeof(char*), buf, bufsize, sizeof(char**));
+    if (!to->h_addr_list) {
+        return PR_FAILURE;
+    }
+
+    /* Copy the addresses, one at a time */
+    for (na = 0, ap = from->h_addr_list; *ap != 0; na++, ap++) {
+        to->h_addr_list[na] = Alloc(to->h_length, buf, bufsize, 0);
+        if (!to->h_addr_list[na]) {
+            return PR_FAILURE;
+        }
+        if (conversion != _PRIPAddrNoConversion
+            && from->h_addrtype == AF_INET) {
+            if (conversion == _PRIPAddrIPv4Mapped) {
+                MakeIPv4MappedAddr(*ap, to->h_addr_list[na]);
+            } else {
+                PR_ASSERT(conversion == _PRIPAddrIPv4Compat);
+                MakeIPv4CompatAddr(*ap, to->h_addr_list[na]);
+            }
+        } else {
+            memcpy(to->h_addr_list[na], *ap, to->h_length);
+        }
+    }
+    to->h_addr_list[na] = 0;
+    return PR_SUCCESS;
+}
+
+#if !defined(_PR_HAVE_GETPROTO_R)
+/*
+** Copy a protoent, and all of the memory that it refers to into
+** (hopefully) stacked buffers.
+*/
+static PRStatus CopyProtoent(
+    struct protoent *from, char *buf, PRIntn bufsize, PRProtoEnt *to)
+{
+    PRIntn len, na;
+    char **ap;
+
+    /* Do the easy stuff */
+    to->p_num = from->p_proto;
+
+    /* Copy the official name */
+    if (!from->p_name) {
+        return PR_FAILURE;
+    }
+    len = strlen(from->p_name) + 1;
+    to->p_name = Alloc(len, &buf, &bufsize, 0);
+    if (!to->p_name) {
+        return PR_FAILURE;
+    }
+    memcpy(to->p_name, from->p_name, len);
+
+    /* Count the aliases, then allocate storage for the pointers */
+    for (na = 1, ap = from->p_aliases; *ap != 0; na++, ap++) {;} /* nothing to execute */
+    to->p_aliases = (char**)Alloc(
+                        na * sizeof(char*), &buf, &bufsize, sizeof(char**));
+    if (!to->p_aliases) {
+        return PR_FAILURE;
+    }
+
+    /* Copy the aliases, one at a time */
+    for (na = 0, ap = from->p_aliases; *ap != 0; na++, ap++) {
+        len = strlen(*ap) + 1;
+        to->p_aliases[na] = Alloc(len, &buf, &bufsize, 0);
+        if (!to->p_aliases[na]) {
+            return PR_FAILURE;
+        }
+        memcpy(to->p_aliases[na], *ap, len);
+    }
+    to->p_aliases[na] = 0;
+
+    return PR_SUCCESS;
+}
+#endif /* !defined(_PR_HAVE_GETPROTO_R) */
+
+/*
+ * #################################################################
+ * NOTE: tmphe, tmpbuf, bufsize, h, and h_err are local variables
+ * or arguments of PR_GetHostByName, PR_GetIPNodeByName, and
+ * PR_GetHostByAddr.  DO NOT CHANGE THE NAMES OF THESE LOCAL
+ * VARIABLES OR ARGUMENTS.
+ * #################################################################
+ */
+#if defined(_PR_HAVE_GETHOST_R_INT)
+
+#define GETHOSTBYNAME(name) \
+    (gethostbyname_r(name, &tmphe, tmpbuf, bufsize, &h, &h_err), h)
+#define GETHOSTBYNAME2(name, af) \
+    (gethostbyname2_r(name, af, &tmphe, tmpbuf, bufsize, &h, &h_err), h)
+#define GETHOSTBYADDR(addr, addrlen, af) \
+    (gethostbyaddr_r(addr, addrlen, af, \
+    &tmphe, tmpbuf, bufsize, &h, &h_err), h)
+
+#elif defined(_PR_HAVE_GETHOST_R_POINTER)
+
+#define GETHOSTBYNAME(name) \
+    gethostbyname_r(name, &tmphe, tmpbuf, bufsize, &h_err)
+#define GETHOSTBYNAME2(name, af) \
+    gethostbyname2_r(name, af, &tmphe, tmpbuf, bufsize, &h_err)
+#define GETHOSTBYADDR(addr, addrlen, af) \
+    gethostbyaddr_r(addr, addrlen, af, &tmphe, tmpbuf, bufsize, &h_err)
+
+#else
+
+#define GETHOSTBYNAME(name) gethostbyname(name)
+#define GETHOSTBYNAME2(name, af) gethostbyname2(name, af)
+#define GETHOSTBYADDR(addr, addrlen, af) gethostbyaddr(addr, addrlen, af)
+
+#endif  /* definition of GETHOSTBYXXX */
+
+PR_IMPLEMENT(PRStatus) PR_GetHostByName(
+    const char *name, char *buf, PRIntn bufsize, PRHostEnt *hp)
+{
+    struct hostent *h;
+    PRStatus rv = PR_FAILURE;
+#if defined(_PR_HAVE_GETHOST_R)
+    char localbuf[PR_NETDB_BUF_SIZE];
+    char *tmpbuf;
+    struct hostent tmphe;
+    int h_err;
+#endif
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+#if defined(_PR_HAVE_GETHOST_R)
+    tmpbuf = localbuf;
+    if (bufsize > sizeof(localbuf))
+    {
+        tmpbuf = (char *)PR_Malloc(bufsize);
+        if (NULL == tmpbuf)
+        {
+            PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+            return rv;
+        }
+    }
+#endif
+
+    LOCK_DNS();
+
+    h = GETHOSTBYNAME(name);
+
+    if (NULL == h)
+    {
+        PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
+    }
+    else
+    {
+        _PRIPAddrConversion conversion = _PRIPAddrNoConversion;
+        rv = CopyHostent(h, &buf, &bufsize, conversion, hp);
+        if (PR_SUCCESS != rv) {
+            PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
+        }
+    }
+    UNLOCK_DNS();
+#if defined(_PR_HAVE_GETHOST_R)
+    if (tmpbuf != localbuf) {
+        PR_Free(tmpbuf);
+    }
+#endif
+    return rv;
+}
+
+#if !defined(_PR_INET6) && \
+        defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
+typedef struct hostent  * (*_pr_getipnodebyname_t)(const char *, int,
+        int, int *);
+typedef struct hostent  * (*_pr_getipnodebyaddr_t)(const void *, size_t,
+        int, int *);
+typedef void (*_pr_freehostent_t)(struct hostent *);
+static void * _pr_getipnodebyname_fp;
+static void * _pr_getipnodebyaddr_fp;
+static void * _pr_freehostent_fp;
+
+/*
+ * Look up the addresses of getipnodebyname, getipnodebyaddr,
+ * and freehostent.
+ */
+PRStatus
+_pr_find_getipnodebyname(void)
+{
+    PRLibrary *lib;
+    PRStatus rv;
+#define GETIPNODEBYNAME "getipnodebyname"
+#define GETIPNODEBYADDR "getipnodebyaddr"
+#define FREEHOSTENT     "freehostent"
+
+    _pr_getipnodebyname_fp = PR_FindSymbolAndLibrary(GETIPNODEBYNAME, &lib);
+    if (NULL != _pr_getipnodebyname_fp) {
+        _pr_freehostent_fp = PR_FindSymbol(lib, FREEHOSTENT);
+        if (NULL != _pr_freehostent_fp) {
+            _pr_getipnodebyaddr_fp = PR_FindSymbol(lib, GETIPNODEBYADDR);
+            if (NULL != _pr_getipnodebyaddr_fp) {
+                rv = PR_SUCCESS;
+            }
+            else {
+                rv = PR_FAILURE;
+            }
+        } else {
+            rv = PR_FAILURE;
+        }
+        (void)PR_UnloadLibrary(lib);
+    } else {
+        rv = PR_FAILURE;
+    }
+    return rv;
+}
+#endif
+
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
+/*
+** Append the V4 addresses to the end of the list
+*/
+static PRStatus AppendV4AddrsToHostent(
+    struct hostent *from,
+    char **buf,
+    PRIntn *bufsize,
+    PRHostEnt *to)
+{
+    PRIntn na, na_old;
+    char **ap;
+    char **new_addr_list;
+
+    /* Count the addresses, then grow storage for the pointers */
+    for (na_old = 0, ap = to->h_addr_list; *ap != 0; na_old++, ap++)
+    {;} /* nothing to execute */
+    for (na = na_old + 1, ap = from->h_addr_list; *ap != 0; na++, ap++)
+    {;} /* nothing to execute */
+    new_addr_list = (char**)Alloc(
+                        na * sizeof(char*), buf, bufsize, sizeof(char**));
+    if (!new_addr_list) {
+        return PR_FAILURE;
+    }
+
+    /* Copy the V6 addresses, one at a time */
+    for (na = 0, ap = to->h_addr_list; *ap != 0; na++, ap++) {
+        new_addr_list[na] = to->h_addr_list[na];
+    }
+    to->h_addr_list = new_addr_list;
+
+    /* Copy the V4 addresses, one at a time */
+    for (ap = from->h_addr_list; *ap != 0; na++, ap++) {
+        to->h_addr_list[na] = Alloc(to->h_length, buf, bufsize, 0);
+        if (!to->h_addr_list[na]) {
+            return PR_FAILURE;
+        }
+        MakeIPv4MappedAddr(*ap, to->h_addr_list[na]);
+    }
+    to->h_addr_list[na] = 0;
+    return PR_SUCCESS;
+}
+#endif
+
+PR_IMPLEMENT(PRStatus) PR_GetIPNodeByName(
+    const char *name, PRUint16 af, PRIntn flags,
+    char *buf, PRIntn bufsize, PRHostEnt *hp)
+{
+    struct hostent *h = 0;
+    PRStatus rv = PR_FAILURE;
+#if defined(_PR_HAVE_GETHOST_R)
+    char localbuf[PR_NETDB_BUF_SIZE];
+    char *tmpbuf;
+    struct hostent tmphe;
+    int h_err;
+#endif
+#if defined(_PR_HAVE_GETIPNODEBYNAME)
+    PRUint16 md_af = af;
+    int error_num;
+    int tmp_flags = 0;
+#endif
+#if defined(_PR_HAVE_GETHOSTBYNAME2)
+    PRBool did_af_inet = PR_FALSE;
+#endif
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    if (af != PR_AF_INET && af != PR_AF_INET6) {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return PR_FAILURE;
+    }
+
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
+    PR_Lock(_pr_query_ifs_lock);
+    /*
+     * Keep querying the presence of IPv4 and IPv6 interfaces until
+     * at least one is up.  This allows us to detect the local
+     * machine going from offline to online.
+     */
+    if (!_pr_have_inet_if && !_pr_have_inet6_if) {
+        _pr_QueryNetIfs();
+#ifdef DEBUG_QUERY_IFS
+        if (_pr_have_inet_if) {
+            printf("Have IPv4 source address\n");
+        }
+        if (_pr_have_inet6_if) {
+            printf("Have IPv6 source address\n");
+        }
+#endif
+    }
+    PR_Unlock(_pr_query_ifs_lock);
+#endif
+
+#if defined(_PR_HAVE_GETIPNODEBYNAME)
+    if (flags & PR_AI_V4MAPPED) {
+        tmp_flags |= AI_V4MAPPED;
+    }
+    if (flags & PR_AI_ADDRCONFIG) {
+        tmp_flags |= AI_ADDRCONFIG;
+    }
+    if (flags & PR_AI_ALL) {
+        tmp_flags |= AI_ALL;
+    }
+    if (af == PR_AF_INET6) {
+        md_af = AF_INET6;
+    }
+    else {
+        md_af = af;
+    }
+#endif
+
+#if defined(_PR_HAVE_GETHOST_R)
+    tmpbuf = localbuf;
+    if (bufsize > sizeof(localbuf))
+    {
+        tmpbuf = (char *)PR_Malloc(bufsize);
+        if (NULL == tmpbuf)
+        {
+            PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+            return rv;
+        }
+    }
+#endif
+
+    /* Do not need to lock the DNS lock if getipnodebyname() is called */
+#ifdef _PR_INET6
+#ifdef _PR_HAVE_GETHOSTBYNAME2
+    LOCK_DNS();
+    if (af == PR_AF_INET6)
+    {
+        if ((flags & PR_AI_ADDRCONFIG) == 0 || _pr_have_inet6_if)
+        {
+#ifdef _PR_INET6_PROBE
+            if (_pr_ipv6_is_present())
+#endif
+                h = GETHOSTBYNAME2(name, AF_INET6);
+        }
+        if ((NULL == h) && (flags & PR_AI_V4MAPPED)
+            && ((flags & PR_AI_ADDRCONFIG) == 0 || _pr_have_inet_if))
+        {
+            did_af_inet = PR_TRUE;
+            h = GETHOSTBYNAME2(name, AF_INET);
+        }
+    }
+    else
+    {
+        if ((flags & PR_AI_ADDRCONFIG) == 0 || _pr_have_inet_if)
+        {
+            did_af_inet = PR_TRUE;
+            h = GETHOSTBYNAME2(name, af);
+        }
+    }
+#elif defined(_PR_HAVE_GETIPNODEBYNAME)
+    h = getipnodebyname(name, md_af, tmp_flags, &error_num);
+#else
+#error "Unknown name-to-address translation function"
+#endif  /* _PR_HAVE_GETHOSTBYNAME2 */
+#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
+    if (_pr_ipv6_is_present())
+    {
+#ifdef PR_GETIPNODE_NOT_THREADSAFE
+        LOCK_DNS();
+#endif
+        h = (*((_pr_getipnodebyname_t)_pr_getipnodebyname_fp))(name, md_af, tmp_flags, &error_num);
+    }
+    else
+    {
+        LOCK_DNS();
+        h = GETHOSTBYNAME(name);
+    }
+#else /* _PR_INET6 */
+    LOCK_DNS();
+    h = GETHOSTBYNAME(name);
+#endif /* _PR_INET6 */
+
+    if (NULL == h)
+    {
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYNAME)
+        PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, error_num);
+#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
+        if (_pr_ipv6_is_present()) {
+            PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, error_num);
+        }
+        else {
+            PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
+        }
+#else
+        PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
+#endif
+    }
+    else
+    {
+        _PRIPAddrConversion conversion = _PRIPAddrNoConversion;
+
+        if (af == PR_AF_INET6) {
+            conversion = _PRIPAddrIPv4Mapped;
+        }
+        rv = CopyHostent(h, &buf, &bufsize, conversion, hp);
+        if (PR_SUCCESS != rv) {
+            PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
+        }
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYNAME)
+        freehostent(h);
+#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
+        if (_pr_ipv6_is_present()) {
+            (*((_pr_freehostent_t)_pr_freehostent_fp))(h);
+        }
+#endif
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
+        if ((PR_SUCCESS == rv) && (flags & PR_AI_V4MAPPED)
+            && ((flags & PR_AI_ALL)
+                || ((flags & PR_AI_ADDRCONFIG) && _pr_have_inet_if))
+            && !did_af_inet && (h = GETHOSTBYNAME2(name, AF_INET)) != 0) {
+            rv = AppendV4AddrsToHostent(h, &buf, &bufsize, hp);
+            if (PR_SUCCESS != rv) {
+                PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
+            }
+        }
+#endif
+    }
+
+    /* Must match the convoluted logic above for LOCK_DNS() */
+#ifdef _PR_INET6
+#ifdef _PR_HAVE_GETHOSTBYNAME2
+    UNLOCK_DNS();
+#endif  /* _PR_HAVE_GETHOSTBYNAME2 */
+#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
+#ifdef PR_GETIPNODE_NOT_THREADSAFE
+    UNLOCK_DNS();
+#else
+    if (!_pr_ipv6_is_present()) {
+        UNLOCK_DNS();
+    }
+#endif
+#else /* _PR_INET6 */
+    UNLOCK_DNS();
+#endif /* _PR_INET6 */
+
+#if defined(_PR_HAVE_GETHOST_R)
+    if (tmpbuf != localbuf) {
+        PR_Free(tmpbuf);
+    }
+#endif
+
+    return rv;
+}
+
+PR_IMPLEMENT(PRStatus) PR_GetHostByAddr(
+    const PRNetAddr *hostaddr, char *buf, PRIntn bufsize, PRHostEnt *hostentry)
+{
+    struct hostent *h;
+    PRStatus rv = PR_FAILURE;
+    const void *addr;
+    PRUint32 tmp_ip;
+    int addrlen;
+    PRInt32 af;
+#if defined(_PR_HAVE_GETHOST_R)
+    char localbuf[PR_NETDB_BUF_SIZE];
+    char *tmpbuf;
+    struct hostent tmphe;
+    int h_err;
+#endif
+#if defined(_PR_HAVE_GETIPNODEBYADDR)
+    int error_num;
+#endif
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    if (hostaddr->raw.family == PR_AF_INET6)
+    {
+#if defined(_PR_INET6_PROBE)
+        af = _pr_ipv6_is_present() ? AF_INET6 : AF_INET;
+#elif defined(_PR_INET6)
+        af = AF_INET6;
+#else
+        af = AF_INET;
+#endif
+#if defined(_PR_GHBA_DISALLOW_V4MAPPED)
+        if (_PR_IN6_IS_ADDR_V4MAPPED(&hostaddr->ipv6.ip)) {
+            af = AF_INET;
+        }
+#endif
+    }
+    else
+    {
+        PR_ASSERT(hostaddr->raw.family == AF_INET);
+        af = AF_INET;
+    }
+    if (hostaddr->raw.family == PR_AF_INET6) {
+#if defined(_PR_INET6) || defined(_PR_INET6_PROBE)
+        if (af == AF_INET6) {
+            addr = &hostaddr->ipv6.ip;
+            addrlen = sizeof(hostaddr->ipv6.ip);
+        }
+        else
+#endif
+        {
+            PR_ASSERT(af == AF_INET);
+            if (!_PR_IN6_IS_ADDR_V4MAPPED(&hostaddr->ipv6.ip)) {
+                PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+                return rv;
+            }
+            tmp_ip = _PR_IN6_V4MAPPED_TO_IPADDR((PRIPv6Addr *)
+                                                &hostaddr->ipv6.ip);
+            addr = &tmp_ip;
+            addrlen = sizeof(tmp_ip);
+        }
+    } else {
+        PR_ASSERT(hostaddr->raw.family == AF_INET);
+        PR_ASSERT(af == AF_INET);
+        addr = &hostaddr->inet.ip;
+        addrlen = sizeof(hostaddr->inet.ip);
+    }
+
+#if defined(_PR_HAVE_GETHOST_R)
+    tmpbuf = localbuf;
+    if (bufsize > sizeof(localbuf))
+    {
+        tmpbuf = (char *)PR_Malloc(bufsize);
+        if (NULL == tmpbuf)
+        {
+            PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+            return rv;
+        }
+    }
+#endif
+
+    /* Do not need to lock the DNS lock if getipnodebyaddr() is called */
+#if defined(_PR_HAVE_GETIPNODEBYADDR) && defined(_PR_INET6)
+    h = getipnodebyaddr(addr, addrlen, af, &error_num);
+#elif defined(_PR_HAVE_GETIPNODEBYADDR) && defined(_PR_INET6_PROBE)
+    if (_pr_ipv6_is_present())
+    {
+#ifdef PR_GETIPNODE_NOT_THREADSAFE
+        LOCK_DNS();
+#endif
+        h = (*((_pr_getipnodebyaddr_t)_pr_getipnodebyaddr_fp))(addr, addrlen,
+                af, &error_num);
+    }
+    else
+    {
+        LOCK_DNS();
+        h = GETHOSTBYADDR(addr, addrlen, af);
+    }
+#else   /* _PR_HAVE_GETIPNODEBYADDR */
+    LOCK_DNS();
+    h = GETHOSTBYADDR(addr, addrlen, af);
+#endif /* _PR_HAVE_GETIPNODEBYADDR */
+    if (NULL == h)
+    {
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYADDR)
+        PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, error_num);
+#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYADDR)
+        if (_pr_ipv6_is_present()) {
+            PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, error_num);
+        }
+        else {
+            PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
+        }
+#else
+        PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
+#endif
+    }
+    else
+    {
+        _PRIPAddrConversion conversion = _PRIPAddrNoConversion;
+        if (hostaddr->raw.family == PR_AF_INET6) {
+            if (af == AF_INET) {
+                if (_PR_IN6_IS_ADDR_V4MAPPED((PRIPv6Addr*)
+                                             &hostaddr->ipv6.ip)) {
+                    conversion = _PRIPAddrIPv4Mapped;
+                } else if (_PR_IN6_IS_ADDR_V4COMPAT((PRIPv6Addr *)
+                                                    &hostaddr->ipv6.ip)) {
+                    conversion = _PRIPAddrIPv4Compat;
+                }
+            }
+        }
+        rv = CopyHostent(h, &buf, &bufsize, conversion, hostentry);
+        if (PR_SUCCESS != rv) {
+            PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
+        }
+#if defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYADDR)
+        freehostent(h);
+#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYADDR)
+        if (_pr_ipv6_is_present()) {
+            (*((_pr_freehostent_t)_pr_freehostent_fp))(h);
+        }
+#endif
+    }
+
+    /* Must match the convoluted logic above for LOCK_DNS() */
+#if defined(_PR_HAVE_GETIPNODEBYADDR) && defined(_PR_INET6)
+#elif defined(_PR_HAVE_GETIPNODEBYADDR) && defined(_PR_INET6_PROBE)
+#ifdef PR_GETIPNODE_NOT_THREADSAFE
+    UNLOCK_DNS();
+#else
+    if (!_pr_ipv6_is_present()) {
+        UNLOCK_DNS();
+    }
+#endif
+#else   /* _PR_HAVE_GETIPNODEBYADDR */
+    UNLOCK_DNS();
+#endif /* _PR_HAVE_GETIPNODEBYADDR */
+
+#if defined(_PR_HAVE_GETHOST_R)
+    if (tmpbuf != localbuf) {
+        PR_Free(tmpbuf);
+    }
+#endif
+
+    return rv;
+}
+
+/******************************************************************************/
+/*
+ * Some systems define a reentrant version of getprotobyname(). Too bad
+ * the signature isn't always the same. But hey, they tried. If there
+ * is such a definition, use it. Otherwise, grab a lock and do it here.
+ */
+/******************************************************************************/
+
+#if !defined(_PR_HAVE_GETPROTO_R)
+/*
+ * This may seem like a silly thing to do, but the compiler SHOULD
+ * complain if getprotobyname_r() is implemented on some system and
+ * we're not using it. For sure these signatures are different than
+ * any usable implementation.
+ */
+
+#if defined(ANDROID)
+/* Android's Bionic libc system includes prototypes for these in netdb.h,
+ * but doesn't actually include implementations.  It uses the 5-arg form,
+ * so these functions end up not matching the prototype.  So just rename
+ * them if not found.
+ */
+#define getprotobyname_r _pr_getprotobyname_r
+#define getprotobynumber_r _pr_getprotobynumber_r
+#endif
+
+static struct protoent *getprotobyname_r(const char* name)
+{
+    return getprotobyname(name);
+} /* getprotobyname_r */
+
+static struct protoent *getprotobynumber_r(PRInt32 number)
+{
+    return getprotobynumber(number);
+} /* getprotobynumber_r */
+
+#endif /* !defined(_PR_HAVE_GETPROTO_R) */
+
+PR_IMPLEMENT(PRStatus) PR_GetProtoByName(
+    const char* name, char* buffer, PRInt32 buflen, PRProtoEnt* result)
+{
+    PRStatus rv = PR_SUCCESS;
+#if defined(_PR_HAVE_GETPROTO_R)
+    struct protoent* res = (struct protoent*)result;
+#endif
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+#if defined(_PR_HAVE_GETPROTO_R_INT)
+    {
+        /*
+        ** The protoent_data has a pointer as the first field.
+        ** That implies the buffer better be aligned, and char*
+        ** doesn't promise much.
+        */
+        PRUptrdiff aligned = (PRUptrdiff)buffer;
+        if (0 != (aligned & (sizeof(struct protoent_data*) - 1)))
+        {
+            aligned += sizeof(struct protoent_data*) - 1;
+            aligned &= ~(sizeof(struct protoent_data*) - 1);
+            buflen -= (aligned - (PRUptrdiff)buffer);
+            buffer = (char*)aligned;
+        }
+    }
+#endif  /* defined(_PR_HAVE_GETPROTO_R_INT) */
+
+    if (PR_MIN_NETDB_BUF_SIZE > buflen)
+    {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return PR_FAILURE;
+    }
+
+#if defined(_PR_HAVE_GETPROTO_R_POINTER)
+    if (NULL == getprotobyname_r(name, res, buffer, buflen))
+    {
+        PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+        return PR_FAILURE;
+    }
+#elif defined(_PR_HAVE_GETPROTO_R_INT)
+    /*
+    ** The buffer needs to be zero'd, and it should be
+    ** at least the size of a struct protoent_data.
+    */
+    memset(buffer, 0, buflen);
+    if (-1 == getprotobyname_r(name, res, (struct protoent_data*)buffer))
+    {
+        PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+        return PR_FAILURE;
+    }
+#elif defined(_PR_HAVE_5_ARG_GETPROTO_R)
+    /* The 5th argument for getprotobyname_r() cannot be NULL */
+    if (-1 == getprotobyname_r(name, res, buffer, buflen, &res))
+    {
+        PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+        return PR_FAILURE;
+    }
+#else  /* do it the hard way */
+    {
+        struct protoent *staticBuf;
+        PR_Lock(_getproto_lock);
+        staticBuf = getprotobyname_r(name);
+        if (NULL == staticBuf)
+        {
+            rv = PR_FAILURE;
+            PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+        }
+        else
+        {
+            rv = CopyProtoent(staticBuf, buffer, buflen, result);
+            if (PR_FAILURE == rv) {
+                PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
+            }
+        }
+        PR_Unlock(_getproto_lock);
+    }
+#endif  /* all that */
+    return rv;
+}
+
+PR_IMPLEMENT(PRStatus) PR_GetProtoByNumber(
+    PRInt32 number, char* buffer, PRInt32 buflen, PRProtoEnt* result)
+{
+    PRStatus rv = PR_SUCCESS;
+#if defined(_PR_HAVE_GETPROTO_R)
+    struct protoent* res = (struct protoent*)result;
+#endif
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+#if defined(_PR_HAVE_GETPROTO_R_INT)
+    {
+        /*
+        ** The protoent_data has a pointer as the first field.
+        ** That implies the buffer better be aligned, and char*
+        ** doesn't promise much.
+        */
+        PRUptrdiff aligned = (PRUptrdiff)buffer;
+        if (0 != (aligned & (sizeof(struct protoent_data*) - 1)))
+        {
+            aligned += sizeof(struct protoent_data*) - 1;
+            aligned &= ~(sizeof(struct protoent_data*) - 1);
+            buflen -= (aligned - (PRUptrdiff)buffer);
+            buffer = (char*)aligned;
+        }
+    }
+#endif /* defined(_PR_HAVE_GETPROTO_R_INT) */
+
+    if (PR_MIN_NETDB_BUF_SIZE > buflen)
+    {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return PR_FAILURE;
+    }
+
+#if defined(_PR_HAVE_GETPROTO_R_POINTER)
+    if (NULL == getprotobynumber_r(number, res, buffer, buflen))
+    {
+        PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+        return PR_FAILURE;
+    }
+
+#elif defined(_PR_HAVE_GETPROTO_R_INT)
+    /*
+    ** The buffer needs to be zero'd for these OS's.
+    */
+    memset(buffer, 0, buflen);
+    if (-1 == getprotobynumber_r(number, res, (struct protoent_data*)buffer))
+    {
+        PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+        return PR_FAILURE;
+    }
+#elif defined(_PR_HAVE_5_ARG_GETPROTO_R)
+    /* The 5th argument for getprotobynumber_r() cannot be NULL */
+    if (-1 == getprotobynumber_r(number, res, buffer, buflen, &res))
+    {
+        PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+        return PR_FAILURE;
+    }
+#else  /* do it the hard way */
+    {
+        struct protoent *staticBuf;
+        PR_Lock(_getproto_lock);
+        staticBuf = getprotobynumber_r(number);
+        if (NULL == staticBuf)
+        {
+            rv = PR_FAILURE;
+            PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
+        }
+        else
+        {
+            rv = CopyProtoent(staticBuf, buffer, buflen, result);
+            if (PR_FAILURE == rv) {
+                PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
+            }
+        }
+        PR_Unlock(_getproto_lock);
+    }
+#endif  /* all that crap */
+    return rv;
+
+}
+
+PRUintn _PR_NetAddrSize(const PRNetAddr* addr)
+{
+    PRUintn addrsize;
+
+    /*
+     * RFC 2553 added a new field (sin6_scope_id) to
+     * struct sockaddr_in6.  PRNetAddr's ipv6 member has a
+     * scope_id field to match the new field.  In order to
+     * work with older implementations supporting RFC 2133,
+     * we take the size of struct sockaddr_in6 instead of
+     * addr->ipv6.
+     */
+    if (AF_INET == addr->raw.family) {
+        addrsize = sizeof(addr->inet);
+    }
+    else if (PR_AF_INET6 == addr->raw.family)
+#if defined(_PR_INET6)
+        addrsize = sizeof(struct sockaddr_in6);
+#else
+        addrsize = sizeof(addr->ipv6);
+#endif
+#if defined(XP_UNIX) || defined(XP_OS2)
+    else if (AF_UNIX == addr->raw.family)
+    {
+#if defined(LINUX)
+        if (addr->local.path[0] == 0)
+            /* abstract socket address is supported on Linux only */
+            addrsize = strnlen(addr->local.path + 1,
+                               sizeof(addr->local.path)) +
+                       offsetof(struct sockaddr_un, sun_path) + 1;
+        else
+#endif
+            addrsize = sizeof(addr->local);
+    }
+#endif
+    else {
+        addrsize = 0;
+    }
+
+    return addrsize;
+}  /* _PR_NetAddrSize */
+
+PR_IMPLEMENT(PRIntn) PR_EnumerateHostEnt(
+    PRIntn enumIndex, const PRHostEnt *hostEnt, PRUint16 port, PRNetAddr *address)
+{
+    void *addr = hostEnt->h_addr_list[enumIndex++];
+    memset(address, 0, sizeof(PRNetAddr));
+    if (NULL == addr) {
+        enumIndex = 0;
+    }
+    else
+    {
+        address->raw.family = hostEnt->h_addrtype;
+        if (PR_AF_INET6 == hostEnt->h_addrtype)
+        {
+            address->ipv6.port = htons(port);
+            address->ipv6.flowinfo = 0;
+            address->ipv6.scope_id = 0;
+            memcpy(&address->ipv6.ip, addr, hostEnt->h_length);
+        }
+        else
+        {
+            PR_ASSERT(AF_INET == hostEnt->h_addrtype);
+            address->inet.port = htons(port);
+            memcpy(&address->inet.ip, addr, hostEnt->h_length);
+        }
+    }
+    return enumIndex;
+}  /* PR_EnumerateHostEnt */
+
+PR_IMPLEMENT(PRStatus) PR_InitializeNetAddr(
+    PRNetAddrValue val, PRUint16 port, PRNetAddr *addr)
+{
+    PRStatus rv = PR_SUCCESS;
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    if (val != PR_IpAddrNull) {
+        memset(addr, 0, sizeof(*addr));
+    }
+    addr->inet.family = AF_INET;
+    addr->inet.port = htons(port);
+    switch (val)
+    {
+        case PR_IpAddrNull:
+            break;  /* don't overwrite the address */
+        case PR_IpAddrAny:
+            addr->inet.ip = htonl(INADDR_ANY);
+            break;
+        case PR_IpAddrLoopback:
+            addr->inet.ip = htonl(INADDR_LOOPBACK);
+            break;
+        default:
+            PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+            rv = PR_FAILURE;
+    }
+    return rv;
+}  /* PR_InitializeNetAddr */
+
+PR_IMPLEMENT(PRStatus) PR_SetNetAddr(
+    PRNetAddrValue val, PRUint16 af, PRUint16 port, PRNetAddr *addr)
+{
+    PRStatus rv = PR_SUCCESS;
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    if (af == PR_AF_INET6)
+    {
+        if (val != PR_IpAddrNull) {
+            memset(addr, 0, sizeof(addr->ipv6));
+        }
+        addr->ipv6.family = af;
+        addr->ipv6.port = htons(port);
+        addr->ipv6.flowinfo = 0;
+        addr->ipv6.scope_id = 0;
+        switch (val)
+        {
+            case PR_IpAddrNull:
+                break;  /* don't overwrite the address */
+            case PR_IpAddrAny:
+                addr->ipv6.ip = _pr_in6addr_any;
+                break;
+            case PR_IpAddrLoopback:
+                addr->ipv6.ip = _pr_in6addr_loopback;
+                break;
+            default:
+                PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+                rv = PR_FAILURE;
+        }
+    }
+    else
+    {
+        if (val != PR_IpAddrNull) {
+            memset(addr, 0, sizeof(addr->inet));
+        }
+        addr->inet.family = af;
+        addr->inet.port = htons(port);
+        switch (val)
+        {
+            case PR_IpAddrNull:
+                break;  /* don't overwrite the address */
+            case PR_IpAddrAny:
+                addr->inet.ip = htonl(INADDR_ANY);
+                break;
+            case PR_IpAddrLoopback:
+                addr->inet.ip = htonl(INADDR_LOOPBACK);
+                break;
+            default:
+                PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+                rv = PR_FAILURE;
+        }
+    }
+    return rv;
+}  /* PR_SetNetAddr */
+
+PR_IMPLEMENT(PRBool)
+PR_IsNetAddrType(const PRNetAddr *addr, PRNetAddrValue val)
+{
+    if (addr->raw.family == PR_AF_INET6) {
+        if (val == PR_IpAddrAny) {
+            if (_PR_IN6_IS_ADDR_UNSPECIFIED((PRIPv6Addr *)&addr->ipv6.ip)) {
+                return PR_TRUE;
+            }
+            if (_PR_IN6_IS_ADDR_V4MAPPED((PRIPv6Addr *)&addr->ipv6.ip)
+                && _PR_IN6_V4MAPPED_TO_IPADDR((PRIPv6Addr *)&addr->ipv6.ip)
+                == htonl(INADDR_ANY)) {
+                return PR_TRUE;
+            }
+        } else if (val == PR_IpAddrLoopback) {
+            if (_PR_IN6_IS_ADDR_LOOPBACK((PRIPv6Addr *)&addr->ipv6.ip)) {
+                return PR_TRUE;
+            }
+            if (_PR_IN6_IS_ADDR_V4MAPPED((PRIPv6Addr *)&addr->ipv6.ip)
+                && _PR_IN6_V4MAPPED_TO_IPADDR((PRIPv6Addr *)&addr->ipv6.ip)
+                == htonl(INADDR_LOOPBACK)) {
+                return PR_TRUE;
+            }
+        } else if (val == PR_IpAddrV4Mapped
+                   && _PR_IN6_IS_ADDR_V4MAPPED((PRIPv6Addr *)&addr->ipv6.ip)) {
+            return PR_TRUE;
+        }
+    } else {
+        if (addr->raw.family == AF_INET) {
+            if (val == PR_IpAddrAny && addr->inet.ip == htonl(INADDR_ANY)) {
+                return PR_TRUE;
+            }
+            if (val == PR_IpAddrLoopback
+                && addr->inet.ip == htonl(INADDR_LOOPBACK)) {
+                return PR_TRUE;
+            }
+        }
+    }
+    return PR_FALSE;
+}
+
+extern int pr_inet_aton(const char *cp, PRUint32 *addr);
+
+#define XX 127
+static const unsigned char index_hex[256] = {
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    0, 1, 2, 3,  4, 5, 6, 7,  8, 9,XX,XX, XX,XX,XX,XX,
+    XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+    XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
+};
+
+/*
+ * StringToV6Addr() returns 1 if the conversion succeeds,
+ * or 0 if the input is not a valid IPv6 address string.
+ * (Same as inet_pton(AF_INET6, string, addr).)
+ */
+static int StringToV6Addr(const char *string, PRIPv6Addr *addr)
+{
+    const unsigned char *s = (const unsigned char *)string;
+    int section = 0;        /* index of the current section (a 16-bit
+                             * piece of the address */
+    int double_colon = -1;  /* index of the section after the first
+                             * 16-bit group of zeros represented by
+                             * the double colon */
+    unsigned int val;
+    int len;
+
+    /* Handle initial (double) colon */
+    if (*s == ':') {
+        if (s[1] != ':') {
+            return 0;
+        }
+        s += 2;
+        addr->pr_s6_addr16[0] = 0;
+        section = double_colon = 1;
+    }
+
+    while (*s) {
+        if (section == 8) {
+            return 0;    /* too long */
+        }
+        if (*s == ':') {
+            if (double_colon != -1) {
+                return 0;    /* two double colons */
+            }
+            addr->pr_s6_addr16[section++] = 0;
+            double_colon = section;
+            s++;
+            continue;
+        }
+        for (len = val = 0; len < 4 && index_hex[*s] != XX; len++) {
+            val = (val << 4) + index_hex[*s++];
+        }
+        if (*s == '.') {
+            if (len == 0) {
+                return 0;    /* nothing between : and . */
+            }
+            break;
+        }
+        if (*s == ':') {
+            s++;
+            if (!*s) {
+                return 0;    /* cannot end with single colon */
+            }
+        } else if (*s) {
+            return 0; /* bad character */
+        }
+        addr->pr_s6_addr16[section++] = htons((unsigned short)val);
+    }
+
+    if (*s == '.') {
+        /* Have a trailing v4 format address */
+        if (section > 6) {
+            return 0;    /* not enough room */
+        }
+
+        /*
+         * The number before the '.' is decimal, but we parsed it
+         * as hex.  That means it is in BCD.  Check it for validity
+         * and convert it to binary.
+         */
+        if (val > 0x0255 || (val & 0xf0) > 0x90 || (val & 0xf) > 9) {
+            return 0;
+        }
+        val = (val >> 8) * 100 + ((val >> 4) & 0xf) * 10 + (val & 0xf);
+        addr->pr_s6_addr[2 * section] = val;
+
+        s++;
+        val = index_hex[*s++];
+        if (val > 9) {
+            return 0;
+        }
+        while (*s >= '0' && *s <= '9') {
+            val = val * 10 + *s++ - '0';
+            if (val > 255) {
+                return 0;
+            }
+        }
+        if (*s != '.') {
+            return 0;    /* must have exactly 4 decimal numbers */
+        }
+        addr->pr_s6_addr[2 * section + 1] = val;
+        section++;
+
+        s++;
+        val = index_hex[*s++];
+        if (val > 9) {
+            return 0;
+        }
+        while (*s >= '0' && *s <= '9') {
+            val = val * 10 + *s++ - '0';
+            if (val > 255) {
+                return 0;
+            }
+        }
+        if (*s != '.') {
+            return 0;    /* must have exactly 4 decimal numbers */
+        }
+        addr->pr_s6_addr[2 * section] = val;
+
+        s++;
+        val = index_hex[*s++];
+        if (val > 9) {
+            return 0;
+        }
+        while (*s >= '0' && *s <= '9') {
+            val = val * 10 + *s++ - '0';
+            if (val > 255) {
+                return 0;
+            }
+        }
+        if (*s) {
+            return 0;    /* must have exactly 4 decimal numbers */
+        }
+        addr->pr_s6_addr[2 * section + 1] = val;
+        section++;
+    }
+
+    if (double_colon != -1) {
+        /* Stretch the double colon */
+        int tosection;
+        int ncopy = section - double_colon;
+        for (tosection = 7; ncopy--; tosection--) {
+            addr->pr_s6_addr16[tosection] =
+                addr->pr_s6_addr16[double_colon + ncopy];
+        }
+        while (tosection >= double_colon) {
+            addr->pr_s6_addr16[tosection--] = 0;
+        }
+    } else if (section != 8) {
+        return 0; /* too short */
+    }
+    return 1;
+}
+#undef XX
+
+#ifndef _PR_HAVE_INET_NTOP
+static const char *basis_hex = "0123456789abcdef";
+
+/*
+ * V6AddrToString() returns a pointer to the buffer containing
+ * the text string if the conversion succeeds, and NULL otherwise.
+ * (Same as inet_ntop(AF_INET6, addr, buf, size), except that errno
+ * is not set on failure.)
+ */
+static const char *V6AddrToString(
+    const PRIPv6Addr *addr, char *buf, PRUint32 size)
+{
+#define STUFF(c) do { \
+    if (!size--) return NULL; \
+    *buf++ = (c); \
+} while (0)
+
+    int double_colon = -1;          /* index of the first 16-bit
+                                     * group of zeros represented
+                                     * by the double colon */
+    int double_colon_length = 1;    /* use double colon only if
+                                     * there are two or more 16-bit
+                                     * groups of zeros */
+    int zero_length;
+    int section;
+    unsigned int val;
+    const char *bufcopy = buf;
+
+    /* Scan to find the placement of the double colon */
+    for (section = 0; section < 8; section++) {
+        if (addr->pr_s6_addr16[section] == 0) {
+            zero_length = 1;
+            section++;
+            while (section < 8 && addr->pr_s6_addr16[section] == 0) {
+                zero_length++;
+                section++;
+            }
+            /* Select the longest sequence of zeros */
+            if (zero_length > double_colon_length) {
+                double_colon = section - zero_length;
+                double_colon_length = zero_length;
+            }
+        }
+    }
+
+    /* Now start converting to a string */
+    section = 0;
+
+    if (double_colon == 0) {
+        if (double_colon_length == 6 ||
+            (double_colon_length == 5 && addr->pr_s6_addr16[5] == 0xffff)) {
+            /* ipv4 format address */
+            STUFF(':');
+            STUFF(':');
+            if (double_colon_length == 5) {
+                STUFF('f');
+                STUFF('f');
+                STUFF('f');
+                STUFF('f');
+                STUFF(':');
+            }
+            if (addr->pr_s6_addr[12] > 99) {
+                STUFF(addr->pr_s6_addr[12]/100 + '0');
+            }
+            if (addr->pr_s6_addr[12] > 9) {
+                STUFF((addr->pr_s6_addr[12]%100)/10 + '0');
+            }
+            STUFF(addr->pr_s6_addr[12]%10 + '0');
+            STUFF('.');
+            if (addr->pr_s6_addr[13] > 99) {
+                STUFF(addr->pr_s6_addr[13]/100 + '0');
+            }
+            if (addr->pr_s6_addr[13] > 9) {
+                STUFF((addr->pr_s6_addr[13]%100)/10 + '0');
+            }
+            STUFF(addr->pr_s6_addr[13]%10 + '0');
+            STUFF('.');
+            if (addr->pr_s6_addr[14] > 99) {
+                STUFF(addr->pr_s6_addr[14]/100 + '0');
+            }
+            if (addr->pr_s6_addr[14] > 9) {
+                STUFF((addr->pr_s6_addr[14]%100)/10 + '0');
+            }
+            STUFF(addr->pr_s6_addr[14]%10 + '0');
+            STUFF('.');
+            if (addr->pr_s6_addr[15] > 99) {
+                STUFF(addr->pr_s6_addr[15]/100 + '0');
+            }
+            if (addr->pr_s6_addr[15] > 9) {
+                STUFF((addr->pr_s6_addr[15]%100)/10 + '0');
+            }
+            STUFF(addr->pr_s6_addr[15]%10 + '0');
+            STUFF('\0');
+            return bufcopy;
+        }
+    }
+
+    while (section < 8) {
+        if (section == double_colon) {
+            STUFF(':');
+            STUFF(':');
+            section += double_colon_length;
+            continue;
+        }
+        val = ntohs(addr->pr_s6_addr16[section]);
+        if (val > 0xfff) {
+            STUFF(basis_hex[val >> 12]);
+        }
+        if (val > 0xff) {
+            STUFF(basis_hex[(val >> 8) & 0xf]);
+        }
+        if (val > 0xf) {
+            STUFF(basis_hex[(val >> 4) & 0xf]);
+        }
+        STUFF(basis_hex[val & 0xf]);
+        section++;
+        if (section < 8 && section != double_colon) {
+            STUFF(':');
+        }
+    }
+    STUFF('\0');
+    return bufcopy;
+#undef STUFF
+}
+#endif /* !_PR_HAVE_INET_NTOP */
+
+/*
+ * Convert an IPv4 addr to an (IPv4-mapped) IPv6 addr
+ */
+PR_IMPLEMENT(void) PR_ConvertIPv4AddrToIPv6(PRUint32 v4addr, PRIPv6Addr *v6addr)
+{
+    PRUint8 *dstp;
+    dstp = v6addr->pr_s6_addr;
+    memset(dstp, 0, 10);
+    memset(dstp + 10, 0xff, 2);
+    memcpy(dstp + 12,(char *) &v4addr, 4);
+}
+
+PR_IMPLEMENT(PRUint16) PR_ntohs(PRUint16 n) {
+    return ntohs(n);
+}
+PR_IMPLEMENT(PRUint32) PR_ntohl(PRUint32 n) {
+    return ntohl(n);
+}
+PR_IMPLEMENT(PRUint16) PR_htons(PRUint16 n) {
+    return htons(n);
+}
+PR_IMPLEMENT(PRUint32) PR_htonl(PRUint32 n) {
+    return htonl(n);
+}
+PR_IMPLEMENT(PRUint64) PR_ntohll(PRUint64 n)
+{
+#ifdef IS_BIG_ENDIAN
+    return n;
+#else
+    PRUint32 hi, lo;
+    lo = (PRUint32)n;
+    hi = (PRUint32)(n >> 32);
+    hi = PR_ntohl(hi);
+    lo = PR_ntohl(lo);
+    return ((PRUint64)lo << 32) + (PRUint64)hi;
+#endif
+}  /* ntohll */
+
+PR_IMPLEMENT(PRUint64) PR_htonll(PRUint64 n)
+{
+#ifdef IS_BIG_ENDIAN
+    return n;
+#else
+    PRUint32 hi, lo;
+    lo = (PRUint32)n;
+    hi = (PRUint32)(n >> 32);
+    hi = htonl(hi);
+    lo = htonl(lo);
+    return ((PRUint64)lo << 32) + (PRUint64)hi;
+#endif
+}  /* htonll */
+
+
+/*
+ * Implementation of PR_GetAddrInfoByName and friends
+ *
+ * Compile-time options:
+ *
+ *  _PR_HAVE_GETADDRINFO  Define this macro if the target system provides
+ *                        getaddrinfo. With this defined, NSPR will require
+ *                        getaddrinfo at run time. If this if not defined,
+ *                        then NSPR will attempt to dynamically resolve
+ *                        getaddrinfo, falling back to PR_GetHostByName if
+ *                        getaddrinfo does not exist on the target system.
+ *
+ * Since getaddrinfo is a relatively new system call on many systems,
+ * we are forced to dynamically resolve it at run time in most cases.
+ * The exception includes any system (such as Mac OS X) that is known to
+ * provide getaddrinfo in all versions that NSPR cares to support.
+ */
+
+#if defined(_PR_HAVE_GETADDRINFO)
+
+#if defined(_PR_INET6)
+
+typedef struct addrinfo PRADDRINFO;
+#define GETADDRINFO getaddrinfo
+#define FREEADDRINFO freeaddrinfo
+#define GETNAMEINFO getnameinfo
+
+#elif defined(_PR_INET6_PROBE)
+
+typedef struct addrinfo PRADDRINFO;
+
+/* getaddrinfo/freeaddrinfo/getnameinfo prototypes */
+#if defined(WIN32)
+#define FUNC_MODIFIER __stdcall
+#else
+#define FUNC_MODIFIER
+#endif
+typedef int (FUNC_MODIFIER * FN_GETADDRINFO)
+(const char *nodename,
+ const char *servname,
+ const PRADDRINFO *hints,
+ PRADDRINFO **res);
+typedef int (FUNC_MODIFIER * FN_FREEADDRINFO)
+(PRADDRINFO *ai);
+typedef int (FUNC_MODIFIER * FN_GETNAMEINFO)
+(const struct sockaddr *addr, int addrlen,
+ char *host, int hostlen,
+ char *serv, int servlen, int flags);
+
+/* global state */
+static FN_GETADDRINFO   _pr_getaddrinfo   = NULL;
+static FN_FREEADDRINFO  _pr_freeaddrinfo  = NULL;
+static FN_GETNAMEINFO   _pr_getnameinfo   = NULL;
+
+#define GETADDRINFO_SYMBOL "getaddrinfo"
+#define FREEADDRINFO_SYMBOL "freeaddrinfo"
+#define GETNAMEINFO_SYMBOL "getnameinfo"
+
+PRStatus
+_pr_find_getaddrinfo(void)
+{
+    PRLibrary *lib;
+#ifdef WIN32
+    /*
+     * On windows, we need to search ws2_32.dll or wship6.dll
+     * (Microsoft IPv6 Technology Preview for Windows 2000) for
+     * getaddrinfo and freeaddrinfo.  These libraries might not
+     * be loaded yet.
+     */
+    const char *libname[] = { "ws2_32.dll", "wship6.dll" };
+    int i;
+
+    for (i = 0; i < sizeof(libname)/sizeof(libname[0]); i++) {
+        lib = PR_LoadLibrary(libname[i]);
+        if (!lib) {
+            continue;
+        }
+        _pr_getaddrinfo = (FN_GETADDRINFO)
+                          PR_FindFunctionSymbol(lib, GETADDRINFO_SYMBOL);
+        if (!_pr_getaddrinfo) {
+            PR_UnloadLibrary(lib);
+            continue;
+        }
+        _pr_freeaddrinfo = (FN_FREEADDRINFO)
+                           PR_FindFunctionSymbol(lib, FREEADDRINFO_SYMBOL);
+        _pr_getnameinfo = (FN_GETNAMEINFO)
+                          PR_FindFunctionSymbol(lib, GETNAMEINFO_SYMBOL);
+        if (!_pr_freeaddrinfo || !_pr_getnameinfo) {
+            PR_UnloadLibrary(lib);
+            continue;
+        }
+        /* Keep the library loaded. */
+        return PR_SUCCESS;
+    }
+    return PR_FAILURE;
+#else
+    /*
+     * Resolve getaddrinfo by searching all loaded libraries.  Then
+     * search library containing getaddrinfo for freeaddrinfo.
+     */
+    _pr_getaddrinfo = (FN_GETADDRINFO)
+                      PR_FindFunctionSymbolAndLibrary(GETADDRINFO_SYMBOL, &lib);
+    if (!_pr_getaddrinfo) {
+        return PR_FAILURE;
+    }
+    _pr_freeaddrinfo = (FN_FREEADDRINFO)
+                       PR_FindFunctionSymbol(lib, FREEADDRINFO_SYMBOL);
+    _pr_getnameinfo = (FN_GETNAMEINFO)
+                      PR_FindFunctionSymbol(lib, GETNAMEINFO_SYMBOL);
+    PR_UnloadLibrary(lib);
+    if (!_pr_freeaddrinfo || !_pr_getnameinfo) {
+        return PR_FAILURE;
+    }
+    return PR_SUCCESS;
+#endif
+}
+
+#define GETADDRINFO (*_pr_getaddrinfo)
+#define FREEADDRINFO (*_pr_freeaddrinfo)
+#define GETNAMEINFO (*_pr_getnameinfo)
+
+#endif /* _PR_INET6 */
+
+#endif /* _PR_HAVE_GETADDRINFO */
+
+#if !defined(_PR_HAVE_GETADDRINFO) || defined(_PR_INET6_PROBE)
+/*
+ * If getaddrinfo does not exist, then we will fall back on
+ * PR_GetHostByName, which requires that we allocate a buffer for the
+ * PRHostEnt data structure and its members.
+ */
+typedef struct PRAddrInfoFB {
+    char      buf[PR_NETDB_BUF_SIZE];
+    PRHostEnt hostent;
+    PRBool    has_cname;
+} PRAddrInfoFB;
+
+static PRAddrInfo *
+pr_GetAddrInfoByNameFB(const char  *hostname,
+                       PRUint16     af,
+                       PRIntn       flags)
+{
+    PRStatus rv;
+    PRAddrInfoFB *ai;
+    /* fallback on PR_GetHostByName */
+    ai = PR_NEW(PRAddrInfoFB);
+    if (!ai) {
+        PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+        return NULL;
+    }
+    rv = PR_GetHostByName(hostname, ai->buf, sizeof ai->buf, &ai->hostent);
+    if (rv == PR_FAILURE) {
+        PR_Free(ai);
+        return NULL;
+    }
+    ai->has_cname = !(flags & PR_AI_NOCANONNAME);
+
+    return (PRAddrInfo *) ai;
+}
+#endif /* !_PR_HAVE_GETADDRINFO || _PR_INET6_PROBE */
+
+PR_IMPLEMENT(PRAddrInfo *) PR_GetAddrInfoByName(const char  *hostname,
+        PRUint16     af,
+        PRIntn       flags)
+{
+    /* restrict input to supported values */
+    if ((af != PR_AF_INET && af != PR_AF_UNSPEC) ||
+        (flags & ~ PR_AI_NOCANONNAME) != PR_AI_ADDRCONFIG) {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return NULL;
+    }
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+#if !defined(_PR_HAVE_GETADDRINFO)
+    return pr_GetAddrInfoByNameFB(hostname, af, flags);
+#else
+#if defined(_PR_INET6_PROBE)
+    if (!_pr_ipv6_is_present()) {
+        return pr_GetAddrInfoByNameFB(hostname, af, flags);
+    }
+#endif
+    {
+        PRADDRINFO *res, hints;
+        int rv;
+
+        /*
+         * we assume a RFC 2553 compliant getaddrinfo.  this may at some
+         * point need to be customized as platforms begin to adopt the
+         * RFC 3493.
+         */
+
+        memset(&hints, 0, sizeof(hints));
+        if (!(flags & PR_AI_NOCANONNAME)) {
+            hints.ai_flags |= AI_CANONNAME;
+        }
+#ifdef AI_ADDRCONFIG
+        /*
+         * Propagate AI_ADDRCONFIG to the GETADDRINFO call if PR_AI_ADDRCONFIG
+         * is set.
+         *
+         * Need a workaround for loopback host addresses:
+         * The problem is that in glibc and Windows, AI_ADDRCONFIG applies the
+         * existence of an outgoing network interface to IP addresses of the
+         * loopback interface, due to a strict interpretation of the
+         * specification.  For example, if a computer does not have any
+         * outgoing IPv6 network interface, but its loopback network interface
+         * supports IPv6, a getaddrinfo call on "localhost" with AI_ADDRCONFIG
+         * won't return the IPv6 loopback address "::1", because getaddrinfo
+         * thinks the computer cannot connect to any IPv6 destination,
+         * ignoring the remote vs. local/loopback distinction.
+         */
+        if ((flags & PR_AI_ADDRCONFIG) &&
+            strcmp(hostname, "localhost") != 0 &&
+            strcmp(hostname, "localhost.localdomain") != 0 &&
+            strcmp(hostname, "localhost6") != 0 &&
+            strcmp(hostname, "localhost6.localdomain6") != 0) {
+            hints.ai_flags |= AI_ADDRCONFIG;
+        }
+#endif
+        hints.ai_family = (af == PR_AF_INET) ? AF_INET : AF_UNSPEC;
+
+        /*
+         * it is important to select a socket type in the hints, otherwise we
+         * will get back repetitive entries: one for each socket type.  since
+         * we do not expose ai_socktype through our API, it is okay to do this
+         * here.  the application may still choose to create a socket of some
+         * other type.
+         */
+        hints.ai_socktype = SOCK_STREAM;
+
+        rv = GETADDRINFO(hostname, NULL, &hints, &res);
+#ifdef AI_ADDRCONFIG
+        if (rv == EAI_BADFLAGS && (hints.ai_flags & AI_ADDRCONFIG)) {
+            hints.ai_flags &= ~AI_ADDRCONFIG;
+            rv = GETADDRINFO(hostname, NULL, &hints, &res);
+        }
+#endif
+        if (rv == 0) {
+            return (PRAddrInfo *) res;
+        }
+
+        PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, rv);
+    }
+    return NULL;
+#endif
+}
+
+PR_IMPLEMENT(PRStatus)
+PR_GetPrefLoopbackAddrInfo(PRNetAddr *result,
+                           PRUint16 port)
+{
+    char          tmpBuf[ 40 ];
+    const int     tmpBufSize = sizeof( tmpBuf );
+
+    if (!result) {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return PR_FAILURE;
+    }
+
+    if (!_pr_initialized) _PR_ImplicitInitialization();
+
+    PR_snprintf(tmpBuf, tmpBufSize, "%u", port );
+
+#if !defined(_PR_HAVE_GETADDRINFO) || !defined(AI_PASSIVE)
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+    return PR_FAILURE;
+#else
+
+    PRADDRINFO *res, hints;
+    PRStatus rv;
+
+    memset(&hints, 0, sizeof(hints));
+
+    rv = GETADDRINFO(NULL, tmpBuf, &hints, &res);
+    if (rv == 0) {
+        PRBool result_still_empty = PR_TRUE;
+        PRADDRINFO *ai = res;
+        do {
+            PRNetAddr aNetAddr;
+
+            while (ai && ai->ai_addrlen > sizeof(PRNetAddr))
+                ai = ai->ai_next;
+
+            if (ai) {
+                /* copy sockaddr to PRNetAddr */
+                memcpy(&aNetAddr, ai->ai_addr, ai->ai_addrlen);
+                aNetAddr.raw.family = ai->ai_addr->sa_family;
+#ifdef _PR_INET6
+                if (AF_INET6 == aNetAddr.raw.family)
+                    aNetAddr.raw.family = PR_AF_INET6;
+#endif
+                if (ai->ai_addrlen < sizeof(PRNetAddr))
+                    memset(((char*)result)+ai->ai_addrlen, 0,
+                           sizeof(PRNetAddr) - ai->ai_addrlen);
+            }
+
+            /* If we obtain more than one result, prefer IPv6. */
+            if (result_still_empty || aNetAddr.raw.family == PR_AF_INET6) {
+                memcpy(result, &aNetAddr, sizeof(PRNetAddr));
+            }
+            result_still_empty = PR_FALSE;
+            ai = ai->ai_next;
+        }
+        while (ai);
+
+        FREEADDRINFO(res);
+        return PR_SUCCESS;
+    }
+
+    PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, rv);
+    return PR_FAILURE;
+#endif
+}
+
+PR_IMPLEMENT(void) PR_FreeAddrInfo(PRAddrInfo *ai)
+{
+#if defined(_PR_HAVE_GETADDRINFO)
+#if defined(_PR_INET6_PROBE)
+    if (!_pr_ipv6_is_present()) {
+        PR_Free((PRAddrInfoFB *) ai);
+    }
+    else
+#endif
+        FREEADDRINFO((PRADDRINFO *) ai);
+#else
+    PR_Free((PRAddrInfoFB *) ai);
+#endif
+}
+
+PR_IMPLEMENT(void *) PR_EnumerateAddrInfo(void             *iterPtr,
+        const PRAddrInfo *base,
+        PRUint16          port,
+        PRNetAddr        *result)
+{
+#if defined(_PR_HAVE_GETADDRINFO)
+    PRADDRINFO *ai;
+#if defined(_PR_INET6_PROBE)
+    if (!_pr_ipv6_is_present()) {
+        /* using PRAddrInfoFB */
+        PRIntn iter = (PRIntn)(PRPtrdiff) iterPtr;
+        iter = PR_EnumerateHostEnt(iter, &((PRAddrInfoFB *) base)->hostent, port, result);
+        if (iter < 0) {
+            iter = 0;
+        }
+        return (void *)(PRPtrdiff) iter;
+    }
+#endif
+
+    if (iterPtr) {
+        ai = ((PRADDRINFO *) iterPtr)->ai_next;
+    }
+    else {
+        ai = (PRADDRINFO *) base;
+    }
+
+    while (ai && ai->ai_addrlen > sizeof(PRNetAddr)) {
+        ai = ai->ai_next;
+    }
+
+    if (ai) {
+        /* copy sockaddr to PRNetAddr */
+        memcpy(result, ai->ai_addr, ai->ai_addrlen);
+        result->raw.family = ai->ai_addr->sa_family;
+#ifdef _PR_INET6
+        if (AF_INET6 == result->raw.family) {
+            result->raw.family = PR_AF_INET6;
+        }
+#endif
+        if (ai->ai_addrlen < sizeof(PRNetAddr)) {
+            memset(((char*)result)+ai->ai_addrlen, 0, sizeof(PRNetAddr) - ai->ai_addrlen);
+        }
+
+        if (result->raw.family == PR_AF_INET) {
+            result->inet.port = htons(port);
+        }
+        else {
+            result->ipv6.port = htons(port);
+        }
+    }
+
+    return ai;
+#else
+    /* using PRAddrInfoFB */
+    PRIntn iter = (PRIntn) iterPtr;
+    iter = PR_EnumerateHostEnt(iter, &((PRAddrInfoFB *) base)->hostent, port, result);
+    if (iter < 0) {
+        iter = 0;
+    }
+    return (void *) iter;
+#endif
+}
+
+PR_IMPLEMENT(const char *) PR_GetCanonNameFromAddrInfo(const PRAddrInfo *ai)
+{
+#if defined(_PR_HAVE_GETADDRINFO)
+#if defined(_PR_INET6_PROBE)
+    if (!_pr_ipv6_is_present()) {
+        const PRAddrInfoFB *fb = (const PRAddrInfoFB *) ai;
+        return fb->has_cname ? fb->hostent.h_name : NULL;
+    }
+#endif
+    return ((const PRADDRINFO *) ai)->ai_canonname;
+#else
+    const PRAddrInfoFB *fb = (const PRAddrInfoFB *) ai;
+    return fb->has_cname ? fb->hostent.h_name : NULL;
+#endif
+}
+
+#if defined(_PR_HAVE_GETADDRINFO)
+static PRStatus pr_StringToNetAddrGAI(const char *string, PRNetAddr *addr)
+{
+    PRADDRINFO *res, hints;
+    int rv;  /* 0 for success, or the error code EAI_xxx */
+    PRNetAddr laddr;
+    PRStatus status = PR_SUCCESS;
+
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_flags = AI_NUMERICHOST;
+    hints.ai_family = AF_UNSPEC;
+    hints.ai_socktype = SOCK_STREAM;
+
+    rv = GETADDRINFO(string, NULL, &hints, &res);
+    if (rv != 0)
+    {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, rv);
+        return PR_FAILURE;
+    }
+
+    /* pick up the first addr */
+    memcpy(&laddr, res->ai_addr, res->ai_addrlen);
+    if (AF_INET6 == res->ai_addr->sa_family)
+    {
+        addr->ipv6.family = PR_AF_INET6;
+        addr->ipv6.ip = laddr.ipv6.ip;
+        addr->ipv6.scope_id = laddr.ipv6.scope_id;
+    }
+    else if (AF_INET == res->ai_addr->sa_family)
+    {
+        addr->inet.family = PR_AF_INET;
+        addr->inet.ip = laddr.inet.ip;
+    }
+    else
+    {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        status = PR_FAILURE;
+    }
+
+    FREEADDRINFO(res);
+    return status;
+}
+#endif  /* _PR_HAVE_GETADDRINFO */
+
+static PRStatus pr_StringToNetAddrFB(const char *string, PRNetAddr *addr)
+{
+    PRIntn rv;
+
+    rv = pr_inet_aton(string, &addr->inet.ip);
+    if (1 == rv)
+    {
+        addr->raw.family = AF_INET;
+        return PR_SUCCESS;
+    }
+
+    PR_ASSERT(0 == rv);
+    /* clean up after the failed call */
+    memset(&addr->inet.ip, 0, sizeof(addr->inet.ip));
+
+    rv = StringToV6Addr(string, &addr->ipv6.ip);
+    if (1 == rv)
+    {
+        addr->raw.family = PR_AF_INET6;
+        return PR_SUCCESS;
+    }
+
+    PR_ASSERT(0 == rv);
+    PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+    return PR_FAILURE;
+}
+
+PR_IMPLEMENT(PRStatus) PR_StringToNetAddr(const char *string, PRNetAddr *addr)
+{
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    if (!addr || !string || !*string)
+    {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return PR_FAILURE;
+    }
+
+#if !defined(_PR_HAVE_GETADDRINFO)
+    return pr_StringToNetAddrFB(string, addr);
+#else
+    /*
+     * getaddrinfo with AI_NUMERICHOST is much slower than pr_inet_aton on some
+     * platforms, such as Mac OS X (bug 404399), Linux glibc 2.10 (bug 344809),
+     * and most likely others. So we only use it to convert literal IP addresses
+     * that contain IPv6 scope IDs, which pr_inet_aton cannot convert.
+     */
+    if (!strchr(string, '%')) {
+        return pr_StringToNetAddrFB(string, addr);
+    }
+
+#if defined(_PR_INET6_PROBE)
+    if (!_pr_ipv6_is_present()) {
+        return pr_StringToNetAddrFB(string, addr);
+    }
+#endif
+
+    return pr_StringToNetAddrGAI(string, addr);
+#endif
+}
+
+#if defined(_PR_HAVE_GETADDRINFO)
+static PRStatus pr_NetAddrToStringGNI(
+    const PRNetAddr *addr, char *string, PRUint32 size)
+{
+    int addrlen;
+    const PRNetAddr *addrp = addr;
+#if defined(_PR_HAVE_SOCKADDR_LEN) || defined(_PR_INET6)
+    PRUint16 md_af = addr->raw.family;
+    PRNetAddr addrcopy;
+#endif
+    int rv;  /* 0 for success, or the error code EAI_xxx */
+
+#ifdef _PR_INET6
+    if (addr->raw.family == PR_AF_INET6)
+    {
+        md_af = AF_INET6;
+#ifndef _PR_HAVE_SOCKADDR_LEN
+        addrcopy = *addr;
+        addrcopy.raw.family = md_af;
+        addrp = &addrcopy;
+#endif
+    }
+#endif
+
+    addrlen = PR_NETADDR_SIZE(addr);
+#ifdef _PR_HAVE_SOCKADDR_LEN
+    addrcopy = *addr;
+    ((struct sockaddr*)&addrcopy)->sa_len = addrlen;
+    ((struct sockaddr*)&addrcopy)->sa_family = md_af;
+    addrp = &addrcopy;
+#endif
+    rv = GETNAMEINFO((const struct sockaddr *)addrp, addrlen,
+                     string, size, NULL, 0, NI_NUMERICHOST);
+    if (rv != 0)
+    {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, rv);
+        return PR_FAILURE;
+    }
+    return PR_SUCCESS;
+}
+#endif  /* _PR_HAVE_GETADDRINFO */
+
+#if !defined(_PR_HAVE_GETADDRINFO) || defined(_PR_INET6_PROBE)
+static PRStatus pr_NetAddrToStringFB(
+    const PRNetAddr *addr, char *string, PRUint32 size)
+{
+    if (PR_AF_INET6 == addr->raw.family)
+    {
+#if defined(_PR_HAVE_INET_NTOP)
+        if (NULL == inet_ntop(AF_INET6, &addr->ipv6.ip, string, size))
+#else
+        if (NULL == V6AddrToString(&addr->ipv6.ip, string, size))
+#endif
+        {
+            /* the size of the result buffer is inadequate */
+            PR_SetError(PR_BUFFER_OVERFLOW_ERROR, 0);
+            return PR_FAILURE;
+        }
+    }
+    else
+    {
+        if (size < 16) {
+            goto failed;
+        }
+        if (AF_INET != addr->raw.family) {
+            goto failed;
+        }
+        else
+        {
+            unsigned char *byte = (unsigned char*)&addr->inet.ip;
+            PR_snprintf(string, size, "%u.%u.%u.%u",
+                        byte[0], byte[1], byte[2], byte[3]);
+        }
+    }
+
+    return PR_SUCCESS;
+
+failed:
+    PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+    return PR_FAILURE;
+
+}  /* pr_NetAddrToStringFB */
+#endif  /* !_PR_HAVE_GETADDRINFO || _PR_INET6_PROBE */
+
+PR_IMPLEMENT(PRStatus) PR_NetAddrToString(
+    const PRNetAddr *addr, char *string, PRUint32 size)
+{
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+#if !defined(_PR_HAVE_GETADDRINFO)
+    return pr_NetAddrToStringFB(addr, string, size);
+#else
+#if defined(_PR_INET6_PROBE)
+    if (!_pr_ipv6_is_present()) {
+        return pr_NetAddrToStringFB(addr, string, size);
+    }
+#endif
+    return pr_NetAddrToStringGNI(addr, string, size);
+#endif
+}  /* PR_NetAddrToString */
diff --git a/nsprpub/pr/src/misc/prolock.c b/nsprpub/pr/src/misc/prolock.c
new file mode 100644
index 0000000000..77a26bb2f7
--- /dev/null
+++ b/nsprpub/pr/src/misc/prolock.c
@@ -0,0 +1,56 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+**  prolock.c -- NSPR Ordered Lock
+**
+**  Implement the API defined in prolock.h
+**
+*/
+#include "prolock.h"
+#include "prlog.h"
+#include "prerror.h"
+
+PR_IMPLEMENT(PROrderedLock *)
+PR_CreateOrderedLock(
+    PRInt32 order,
+    const char *name
+)
+{
+    PR_NOT_REACHED("Not implemented"); /* Not implemented yet */
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+    return NULL;
+} /*  end PR_CreateOrderedLock() */
+
+
+PR_IMPLEMENT(void)
+PR_DestroyOrderedLock(
+    PROrderedLock *lock
+)
+{
+    PR_NOT_REACHED("Not implemented"); /* Not implemented yet */
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+} /*  end PR_DestroyOrderedLock() */
+
+
+PR_IMPLEMENT(void)
+PR_LockOrderedLock(
+    PROrderedLock *lock
+)
+{
+    PR_NOT_REACHED("Not implemented"); /* Not implemented yet */
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+} /*  end PR_LockOrderedLock() */
+
+
+PR_IMPLEMENT(PRStatus)
+PR_UnlockOrderedLock(
+    PROrderedLock *lock
+)
+{
+    PR_NOT_REACHED("Not implemented"); /* Not implemented yet */
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+    return PR_FAILURE;
+} /*  end PR_UnlockOrderedLock() */
diff --git a/nsprpub/pr/src/misc/prrng.c b/nsprpub/pr/src/misc/prrng.c
new file mode 100644
index 0000000000..b3e3d4878b
--- /dev/null
+++ b/nsprpub/pr/src/misc/prrng.c
@@ -0,0 +1,44 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "primpl.h"
+
+/*
+ * We were not including <string.h> in optimized builds.  On AIX this
+ * caused libnspr4.so to export memcpy and some binaries linked with
+ * libnspr4.so resolved their memcpy references with libnspr4.so.  To
+ * be backward compatible with old libnspr4.so binaries, we do not
+ * include <string.h> in optimized builds for AIX.  (bug 200561)
+ */
+#if !(defined(AIX) && !defined(DEBUG))
+#include <string.h>
+#endif
+
+PRSize _pr_CopyLowBits(
+    void *dst,
+    PRSize dstlen,
+    void *src,
+    PRSize srclen )
+{
+    if (srclen <= dstlen) {
+        memcpy(dst, src, srclen);
+        return srclen;
+    }
+#if defined IS_BIG_ENDIAN
+    memcpy(dst, (char*)src + (srclen - dstlen), dstlen);
+#else
+    memcpy(dst, src, dstlen);
+#endif
+    return dstlen;
+}
+
+PR_IMPLEMENT(PRSize) PR_GetRandomNoise(
+    void    *buf,
+    PRSize  size
+)
+{
+    return( _PR_MD_GET_RANDOM_NOISE( buf, size ));
+} /* end PR_GetRandomNoise() */
+/* end prrng.c */
diff --git a/nsprpub/pr/src/misc/prsystem.c b/nsprpub/pr/src/misc/prsystem.c
new file mode 100644
index 0000000000..dba093e9b1
--- /dev/null
+++ b/nsprpub/pr/src/misc/prsystem.c
@@ -0,0 +1,373 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "primpl.h"
+#include "prsystem.h"
+#include "prprf.h"
+#include "prlong.h"
+
+#if defined(OS2)
+#define INCL_DOS
+#define INCL_DOSMISC
+#include <os2.h>
+/* define the required constant if it is not already defined in the headers */
+#ifndef QSV_NUMPROCESSORS
+#define QSV_NUMPROCESSORS 26
+#endif
+#endif
+
+/* BSD-derived systems use sysctl() to get the number of processors */
+#if defined(BSDI) || defined(FREEBSD) || defined(NETBSD) \
+    || defined(OPENBSD) || defined(DRAGONFLY) || defined(DARWIN)
+#define _PR_HAVE_SYSCTL
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#endif
+
+#if defined(DARWIN)
+#include <mach/mach_init.h>
+#include <mach/mach_host.h>
+#include <mach/mach_port.h>
+#endif
+
+#if defined(HPUX)
+#include <sys/mpctl.h>
+#include <sys/pstat.h>
+#endif
+
+#if defined(XP_UNIX)
+#include <unistd.h>
+#include <sys/utsname.h>
+#endif
+
+#if defined(LINUX)
+#include <string.h>
+#include <ctype.h>
+#define MAX_LINE 512
+#endif
+
+#if defined(AIX)
+#include <cf.h>
+#include <sys/cfgodm.h>
+#endif
+
+PR_IMPLEMENT(char) PR_GetDirectorySeparator(void)
+{
+    return PR_DIRECTORY_SEPARATOR;
+}  /* PR_GetDirectorySeparator */
+
+/*
+** OBSOLETE -- the function name is misspelled.
+*/
+PR_IMPLEMENT(char) PR_GetDirectorySepartor(void)
+{
+#if defined(DEBUG)
+    static PRBool warn = PR_TRUE;
+    if (warn) {
+        warn = _PR_Obsolete("PR_GetDirectorySepartor()",
+                            "PR_GetDirectorySeparator()");
+    }
+#endif
+    return PR_GetDirectorySeparator();
+}  /* PR_GetDirectorySepartor */
+
+PR_IMPLEMENT(char) PR_GetPathSeparator(void)
+{
+    return PR_PATH_SEPARATOR;
+}  /* PR_GetPathSeparator */
+
+PR_IMPLEMENT(PRStatus) PR_GetSystemInfo(PRSysInfo cmd, char *buf, PRUint32 buflen)
+{
+    PRUintn len = 0;
+
+    if (!_pr_initialized) {
+        _PR_ImplicitInitialization();
+    }
+
+    switch(cmd)
+    {
+        case PR_SI_HOSTNAME:
+        case PR_SI_HOSTNAME_UNTRUNCATED:
+            if (PR_FAILURE == _PR_MD_GETHOSTNAME(buf, (PRUintn)buflen)) {
+                return PR_FAILURE;
+            }
+
+            if (cmd == PR_SI_HOSTNAME_UNTRUNCATED) {
+                break;
+            }
+            /*
+             * On some platforms a system does not have a hostname and
+             * its IP address is returned instead.   The following code
+             * should be skipped on those platforms.
+             */
+#ifndef _PR_GET_HOST_ADDR_AS_NAME
+            /* Return the unqualified hostname */
+            while (buf[len] && (len < buflen)) {
+                if (buf[len] == '.') {
+                    buf[len] = '\0';
+                    break;
+                }
+                len += 1;
+            }
+#endif
+            break;
+
+        case PR_SI_SYSNAME:
+            /* Return the operating system name */
+#if defined(XP_UNIX) || defined(WIN32)
+            if (PR_FAILURE == _PR_MD_GETSYSINFO(cmd, buf, (PRUintn)buflen)) {
+                return PR_FAILURE;
+            }
+#else
+            (void)PR_snprintf(buf, buflen, _PR_SI_SYSNAME);
+#endif
+            break;
+
+        case PR_SI_RELEASE:
+            /* Return the version of the operating system */
+#if defined(XP_UNIX) || defined(WIN32)
+            if (PR_FAILURE == _PR_MD_GETSYSINFO(cmd, buf, (PRUintn)buflen)) {
+                return PR_FAILURE;
+            }
+#endif
+#if defined(XP_OS2)
+            {
+                ULONG os2ver[2] = {0};
+                DosQuerySysInfo(QSV_VERSION_MINOR, QSV_VERSION_REVISION,
+                                &os2ver, sizeof(os2ver));
+                /* Formatting for normal usage (2.11, 3.0, 4.0, 4.5); officially,
+                   Warp 4 is version 2.40.00, WSeB 2.45.00 */
+                if (os2ver[0] < 30)
+                    (void)PR_snprintf(buf, buflen, "%s%lu",
+                                      "2.", os2ver[0]);
+                else if (os2ver[0] < 45)
+                    (void)PR_snprintf(buf, buflen, "%lu%s%lu",
+                                      os2ver[0]/10, ".", os2ver[1]);
+                else
+                    (void)PR_snprintf(buf, buflen, "%.1f",
+                                      os2ver[0]/10.0);
+            }
+#endif /* OS2 */
+            break;
+
+        case PR_SI_RELEASE_BUILD:
+          /* Return the version of the operating system */
+#if defined(XP_UNIX) || defined(WIN32)
+            if (PR_FAILURE == _PR_MD_GETSYSINFO(cmd, buf, (PRUintn)buflen)) {
+              return PR_FAILURE;
+            }
+#else
+            if (buflen) {
+                *buf = 0;
+            }
+#endif /* XP_UNIX || WIN32 */
+            break;
+
+        case PR_SI_ARCHITECTURE:
+            /* Return the architecture of the machine (ie. x86, mips, alpha, ...)*/
+            (void)PR_snprintf(buf, buflen, _PR_SI_ARCHITECTURE);
+            break;
+        default:
+            PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+            return PR_FAILURE;
+    }
+    return PR_SUCCESS;
+}
+
+/*
+** PR_GetNumberOfProcessors()
+**
+** Implementation notes:
+**   Every platform does it a bit different.
+**     numCpus is the returned value.
+**   for each platform's "if defined" section
+**     declare your local variable
+**     do your thing, assign to numCpus
+**   order of the if defined()s may be important,
+**     especially for unix variants. Do platform
+**     specific implementations before XP_UNIX.
+**
+*/
+PR_IMPLEMENT(PRInt32) PR_GetNumberOfProcessors( void )
+{
+    PRInt32     numCpus;
+#if defined(WIN32)
+    SYSTEM_INFO     info;
+
+    GetSystemInfo( &info );
+    numCpus = info.dwNumberOfProcessors;
+#elif defined(OS2)
+    DosQuerySysInfo( QSV_NUMPROCESSORS, QSV_NUMPROCESSORS, &numCpus, sizeof(numCpus));
+#elif defined(_PR_HAVE_SYSCTL)
+    int mib[2];
+    int rc;
+    size_t len = sizeof(numCpus);
+
+    mib[0] = CTL_HW;
+#ifdef HW_NCPUONLINE
+    mib[1] = HW_NCPUONLINE;
+#else
+    mib[1] = HW_NCPU;
+#endif
+    rc = sysctl( mib, 2, &numCpus, &len, NULL, 0 );
+    if ( -1 == rc )  {
+        numCpus = -1; /* set to -1 for return value on error */
+        _PR_MD_MAP_DEFAULT_ERROR( _MD_ERRNO() );
+    }
+#elif defined(HPUX)
+    numCpus = mpctl( MPC_GETNUMSPUS, 0, 0 );
+    if ( numCpus < 1 )  {
+        numCpus = -1; /* set to -1 for return value on error */
+        _PR_MD_MAP_DEFAULT_ERROR( _MD_ERRNO() );
+    }
+#elif defined(RISCOS)
+    numCpus = 1;
+#elif defined(LINUX)
+    /* for the benefit of devices with advanced power-saving, that
+       actually hotplug their cpus in heavy load, try to figure out
+       the real number of CPUs */
+    char buf[MAX_LINE];
+    FILE *fin;
+    const char *cpu_present = "/sys/devices/system/cpu/present";
+    size_t strsize;
+    numCpus = 0;
+    fin = fopen(cpu_present, "r");
+    if (fin != NULL) {
+        if (fgets(buf, MAX_LINE, fin) != NULL) {
+            /* check that the format is what we expect */
+            if (buf[0] == '0') {
+                strsize = strlen(buf);
+                if (strsize == 1) {
+                    /* single core */
+                    numCpus = 1;
+                } else if (strsize >= 3 && strsize <= 5) {
+                    /* should be of the form 0-999 */
+                    /* parse the part after the 0-, note count is 0-based */
+                    if (buf[1] == '-' && isdigit(buf[2])) {
+                        numCpus = 1 + atoi(buf + 2);
+                    }
+                }
+            }
+        }
+        fclose(fin);
+    }
+    /* if that fails, fall back to more standard methods */
+    if (!numCpus) {
+        numCpus = sysconf( _SC_NPROCESSORS_CONF );
+    }
+#elif defined(XP_UNIX)
+    numCpus = sysconf( _SC_NPROCESSORS_CONF );
+#else
+#error "An implementation is required"
+#endif
+    return(numCpus);
+} /* end PR_GetNumberOfProcessors() */
+
+/*
+** PR_GetPhysicalMemorySize()
+**
+** Implementation notes:
+**   Every platform does it a bit different.
+**     bytes is the returned value.
+**   for each platform's "if defined" section
+**     declare your local variable
+**     do your thing, assign to bytes.
+**
+*/
+PR_IMPLEMENT(PRUint64) PR_GetPhysicalMemorySize(void)
+{
+    PRUint64 bytes = 0;
+
+#if defined(LINUX) || defined(SOLARIS)
+
+    long pageSize = sysconf(_SC_PAGESIZE);
+    long pageCount = sysconf(_SC_PHYS_PAGES);
+    if (pageSize >= 0 && pageCount >= 0) {
+        bytes = (PRUint64) pageSize * pageCount;
+    }
+
+#elif defined(NETBSD) || defined(OPENBSD) \
+    || defined(FREEBSD) || defined(DRAGONFLY)
+
+    int mib[2];
+    int rc;
+#ifdef HW_PHYSMEM64
+    uint64_t memSize;
+#else
+    unsigned long memSize;
+#endif
+    size_t len = sizeof(memSize);
+
+    mib[0] = CTL_HW;
+#ifdef HW_PHYSMEM64
+    mib[1] = HW_PHYSMEM64;
+#else
+    mib[1] = HW_PHYSMEM;
+#endif
+    rc = sysctl(mib, 2, &memSize, &len, NULL, 0);
+    if (-1 != rc)  {
+        bytes = memSize;
+    }
+
+#elif defined(HPUX)
+
+    struct pst_static info;
+    int result = pstat_getstatic(&info, sizeof(info), 1, 0);
+    if (result == 1) {
+        bytes = (PRUint64) info.physical_memory * info.page_size;
+    }
+
+#elif defined(DARWIN)
+
+    mach_port_t mach_host = mach_host_self();
+    struct host_basic_info hInfo;
+    mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
+
+    int result = host_info(mach_host,
+                           HOST_BASIC_INFO,
+                           (host_info_t) &hInfo,
+                           &count);
+    mach_port_deallocate(mach_task_self(), mach_host);
+    if (result == KERN_SUCCESS) {
+        bytes = hInfo.max_mem;
+    }
+
+#elif defined(WIN32)
+
+    MEMORYSTATUSEX memStat;
+    memStat.dwLength = sizeof(memStat);
+    if (GlobalMemoryStatusEx(&memStat)) {
+        bytes = memStat.ullTotalPhys;
+    }
+
+#elif defined(OS2)
+
+    ULONG ulPhysMem;
+    DosQuerySysInfo(QSV_TOTPHYSMEM,
+                    QSV_TOTPHYSMEM,
+                    &ulPhysMem,
+                    sizeof(ulPhysMem));
+    bytes = ulPhysMem;
+
+#elif defined(AIX)
+
+    if (odm_initialize() == 0) {
+        int how_many;
+        struct CuAt *obj = getattr("sys0", "realmem", 0, &how_many);
+        if (obj != NULL) {
+            bytes = (PRUint64) atoi(obj->value) * 1024;
+            free(obj);
+        }
+        odm_terminate();
+    }
+
+#else
+
+    PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+
+#endif
+
+    return bytes;
+} /* end PR_GetPhysicalMemorySize() */
diff --git a/nsprpub/pr/src/misc/prthinfo.c b/nsprpub/pr/src/misc/prthinfo.c
new file mode 100644
index 0000000000..14602df0be
--- /dev/null
+++ b/nsprpub/pr/src/misc/prthinfo.c
@@ -0,0 +1,211 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "prlog.h"
+#include "prthread.h"
+#include "private/pprthred.h"
+#include "primpl.h"
+
+PR_IMPLEMENT(PRWord *)
+PR_GetGCRegisters(PRThread *t, int isCurrent, int *np)
+{
+    return _MD_HomeGCRegisters(t, isCurrent, np);
+}
+
+PR_IMPLEMENT(PRStatus)
+PR_ThreadScanStackPointers(PRThread* t,
+                           PRScanStackFun scanFun, void* scanClosure)
+{
+    PRThread* current = PR_GetCurrentThread();
+    PRWord *sp, *esp, *p0;
+    int n;
+    void **ptd;
+    PRStatus status;
+    PRUint32 index;
+    int stack_end;
+
+    /*
+    ** Store the thread's registers in the thread structure so the GC
+    ** can scan them. Then scan them.
+    */
+    p0 = _MD_HomeGCRegisters(t, t == current, &n);
+    status = scanFun(t, (void**)p0, n, scanClosure);
+    if (status != PR_SUCCESS) {
+        return status;
+    }
+
+    /* Scan the C stack for pointers into the GC heap */
+#if defined(XP_PC) && defined(WIN16)
+    /*
+    ** Under WIN16, the stack of the current thread is always mapped into
+    ** the "task stack" (at SS:xxxx).  So, if t is the current thread, scan
+    ** the "task stack".  Otherwise, scan the "cached stack" of the inactive
+    ** thread...
+    */
+    if (t == current) {
+        sp  = (PRWord*) &stack_end;
+        esp = (PRWord*) _pr_top_of_task_stack;
+
+        PR_ASSERT(sp <= esp);
+    } else {
+        sp  = (PRWord*) PR_GetSP(t);
+        esp = (PRWord*) t->stack->stackTop;
+
+        PR_ASSERT((t->stack->stackSize == 0) ||
+                  ((sp >  (PRWord*)t->stack->stackBottom) &&
+                   (sp <= (PRWord*)t->stack->stackTop)));
+    }
+#else   /* ! WIN16 */
+#ifdef HAVE_STACK_GROWING_UP
+    if (t == current) {
+        esp = (PRWord*) &stack_end;
+    } else {
+        esp = (PRWord*) PR_GetSP(t);
+    }
+    sp = (PRWord*) t->stack->stackTop;
+    if (t->stack->stackSize) {
+        PR_ASSERT((esp > (PRWord*)t->stack->stackTop) &&
+                  (esp < (PRWord*)t->stack->stackBottom));
+    }
+#else   /* ! HAVE_STACK_GROWING_UP */
+    if (t == current) {
+        sp = (PRWord*) &stack_end;
+    } else {
+        sp = (PRWord*) PR_GetSP(t);
+    }
+    esp = (PRWord*) t->stack->stackTop;
+    if (t->stack->stackSize) {
+        PR_ASSERT((sp > (PRWord*)t->stack->stackBottom) &&
+                  (sp < (PRWord*)t->stack->stackTop));
+    }
+#endif  /* ! HAVE_STACK_GROWING_UP */
+#endif  /* ! WIN16 */
+
+#if defined(WIN16)
+    {
+        prword_t scan;
+        prword_t limit;
+
+        scan = (prword_t) sp;
+        limit = (prword_t) esp;
+        while (scan < limit) {
+            prword_t *test;
+
+            test = *((prword_t **)scan);
+            status = scanFun(t, (void**)&test, 1, scanClosure);
+            if (status != PR_SUCCESS) {
+                return status;
+            }
+            scan += sizeof(char);
+        }
+    }
+#else
+    if (sp < esp) {
+        status = scanFun(t, (void**)sp, esp - sp, scanClosure);
+        if (status != PR_SUCCESS) {
+            return status;
+        }
+    }
+#endif
+
+    /*
+    ** Mark all of the per-thread-data items attached to this thread
+    **
+    ** The execution environment better be accounted for otherwise it
+    ** will be collected
+    */
+    status = scanFun(t, (void**)&t->environment, 1, scanClosure);
+    if (status != PR_SUCCESS) {
+        return status;
+    }
+
+    /* if thread is not allocated on stack, this is redundant. */
+    ptd = t->privateData;
+    for (index = 0; index < t->tpdLength; index++, ptd++) {
+        status = scanFun(t, (void**)ptd, 1, scanClosure);
+        if (status != PR_SUCCESS) {
+            return status;
+        }
+    }
+
+    return PR_SUCCESS;
+}
+
+/* transducer for PR_EnumerateThreads */
+typedef struct PRScanStackData {
+    PRScanStackFun      scanFun;
+    void*               scanClosure;
+} PRScanStackData;
+
+static PRStatus PR_CALLBACK
+pr_ScanStack(PRThread* t, int i, void* arg)
+{
+    PRScanStackData* data = (PRScanStackData*)arg;
+    return PR_ThreadScanStackPointers(t, data->scanFun, data->scanClosure);
+}
+
+PR_IMPLEMENT(PRStatus)
+PR_ScanStackPointers(PRScanStackFun scanFun, void* scanClosure)
+{
+    PRScanStackData data;
+    data.scanFun = scanFun;
+    data.scanClosure = scanClosure;
+    return PR_EnumerateThreads(pr_ScanStack, &data);
+}
+
+PR_IMPLEMENT(PRUword)
+PR_GetStackSpaceLeft(PRThread* t)
+{
+    PRThread *current = PR_GetCurrentThread();
+    PRWord *sp, *esp;
+    int stack_end;
+
+#if defined(WIN16)
+    /*
+    ** Under WIN16, the stack of the current thread is always mapped into
+    ** the "task stack" (at SS:xxxx).  So, if t is the current thread, scan
+    ** the "task stack".  Otherwise, scan the "cached stack" of the inactive
+    ** thread...
+    */
+    if (t == current) {
+        sp  = (PRWord*) &stack_end;
+        esp = (PRWord*) _pr_top_of_task_stack;
+
+        PR_ASSERT(sp <= esp);
+    } else {
+        sp  = (PRWord*) PR_GetSP(t);
+        esp = (PRWord*) t->stack->stackTop;
+
+        PR_ASSERT((t->stack->stackSize == 0) ||
+                  ((sp >  (PRWord*)t->stack->stackBottom) &&
+                   (sp <= (PRWord*)t->stack->stackTop)));
+    }
+#else   /* ! WIN16 */
+#ifdef HAVE_STACK_GROWING_UP
+    if (t == current) {
+        esp = (PRWord*) &stack_end;
+    } else {
+        esp = (PRWord*) PR_GetSP(t);
+    }
+    sp = (PRWord*) t->stack->stackTop;
+    if (t->stack->stackSize) {
+        PR_ASSERT((esp > (PRWord*)t->stack->stackTop) &&
+                  (esp < (PRWord*)t->stack->stackBottom));
+    }
+#else   /* ! HAVE_STACK_GROWING_UP */
+    if (t == current) {
+        sp = (PRWord*) &stack_end;
+    } else {
+        sp = (PRWord*) PR_GetSP(t);
+    }
+    esp = (PRWord*) t->stack->stackTop;
+    if (t->stack->stackSize) {
+        PR_ASSERT((sp > (PRWord*)t->stack->stackBottom) &&
+                  (sp < (PRWord*)t->stack->stackTop));
+    }
+#endif  /* ! HAVE_STACK_GROWING_UP */
+#endif  /* ! WIN16 */
+    return (PRUword)t->stack->stackSize - ((PRWord)esp - (PRWord)sp);
+}
diff --git a/nsprpub/pr/src/misc/prtime.c b/nsprpub/pr/src/misc/prtime.c
new file mode 100644
index 0000000000..6d711a6b8d
--- /dev/null
+++ b/nsprpub/pr/src/misc/prtime.c
@@ -0,0 +1,2150 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * prtime.c --
+ *
+ *     NSPR date and time functions
+ *
+ */
+
+#include "prinit.h"
+#include "prtime.h"
+#include "prlock.h"
+#include "prprf.h"
+#include "prlog.h"
+
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>  /* for EINVAL */
+#include <time.h>
+
+/*
+ * The COUNT_LEAPS macro counts the number of leap years passed by
+ * till the start of the given year Y.  At the start of the year 4
+ * A.D. the number of leap years passed by is 0, while at the start of
+ * the year 5 A.D. this count is 1. The number of years divisible by
+ * 100 but not divisible by 400 (the non-leap years) is deducted from
+ * the count to get the correct number of leap years.
+ *
+ * The COUNT_DAYS macro counts the number of days since 01/01/01 till the
+ * start of the given year Y. The number of days at the start of the year
+ * 1 is 0 while the number of days at the start of the year 2 is 365
+ * (which is ((2)-1) * 365) and so on. The reference point is 01/01/01
+ * midnight 00:00:00.
+ */
+
+#define COUNT_LEAPS(Y)   ( ((Y)-1)/4 - ((Y)-1)/100 + ((Y)-1)/400 )
+#define COUNT_DAYS(Y)  ( ((Y)-1)*365 + COUNT_LEAPS(Y) )
+#define DAYS_BETWEEN_YEARS(A, B)  (COUNT_DAYS(B) - COUNT_DAYS(A))
+
+/*
+ * Static variables used by functions in this file
+ */
+
+/*
+ * The following array contains the day of year for the last day of
+ * each month, where index 1 is January, and day 0 is January 1.
+ */
+
+static const int lastDayOfMonth[2][13] = {
+    {-1, 30, 58, 89, 119, 150, 180, 211, 242, 272, 303, 333, 364},
+    {-1, 30, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365}
+};
+
+/*
+ * The number of days in a month
+ */
+
+static const PRInt8 nDays[2][12] = {
+    {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
+    {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
+};
+
+/*
+ * Declarations for internal functions defined later in this file.
+ */
+
+static void        ComputeGMT(PRTime time, PRExplodedTime *gmt);
+static int         IsLeapYear(PRInt16 year);
+static void        ApplySecOffset(PRExplodedTime *time, PRInt32 secOffset);
+
+/*
+ *------------------------------------------------------------------------
+ *
+ * ComputeGMT --
+ *
+ *     Caveats:
+ *     - we ignore leap seconds
+ *
+ *------------------------------------------------------------------------
+ */
+
+static void
+ComputeGMT(PRTime time, PRExplodedTime *gmt)
+{
+    PRInt32 tmp, rem;
+    PRInt32 numDays;
+    PRInt64 numDays64, rem64;
+    int isLeap;
+    PRInt64 sec;
+    PRInt64 usec;
+    PRInt64 usecPerSec;
+    PRInt64 secPerDay;
+
+    /*
+     * We first do the usec, sec, min, hour thing so that we do not
+     * have to do LL arithmetic.
+     */
+
+    LL_I2L(usecPerSec, 1000000L);
+    LL_DIV(sec, time, usecPerSec);
+    LL_MOD(usec, time, usecPerSec);
+    LL_L2I(gmt->tm_usec, usec);
+    /* Correct for weird mod semantics so the remainder is always positive */
+    if (gmt->tm_usec < 0) {
+        PRInt64 one;
+
+        LL_I2L(one, 1L);
+        LL_SUB(sec, sec, one);
+        gmt->tm_usec += 1000000L;
+    }
+
+    LL_I2L(secPerDay, 86400L);
+    LL_DIV(numDays64, sec, secPerDay);
+    LL_MOD(rem64, sec, secPerDay);
+    /* We are sure both of these numbers can fit into PRInt32 */
+    LL_L2I(numDays, numDays64);
+    LL_L2I(rem, rem64);
+    if (rem < 0) {
+        numDays--;
+        rem += 86400L;
+    }
+
+    /* Compute day of week.  Epoch started on a Thursday. */
+
+    gmt->tm_wday = (numDays + 4) % 7;
+    if (gmt->tm_wday < 0) {
+        gmt->tm_wday += 7;
+    }
+
+    /* Compute the time of day. */
+
+    gmt->tm_hour = rem / 3600;
+    rem %= 3600;
+    gmt->tm_min = rem / 60;
+    gmt->tm_sec = rem % 60;
+
+    /*
+     * Compute the year by finding the 400 year period, then working
+     * down from there.
+     *
+     * Since numDays is originally the number of days since January 1, 1970,
+     * we must change it to be the number of days from January 1, 0001.
+     */
+
+    numDays += 719162;       /* 719162 = days from year 1 up to 1970 */
+    tmp = numDays / 146097;  /* 146097 = days in 400 years */
+    rem = numDays % 146097;
+    gmt->tm_year = tmp * 400 + 1;
+
+    /* Compute the 100 year period. */
+
+    tmp = rem / 36524;    /* 36524 = days in 100 years */
+    rem %= 36524;
+    if (tmp == 4) {       /* the 400th year is a leap year */
+        tmp = 3;
+        rem = 36524;
+    }
+    gmt->tm_year += tmp * 100;
+
+    /* Compute the 4 year period. */
+
+    tmp = rem / 1461;     /* 1461 = days in 4 years */
+    rem %= 1461;
+    gmt->tm_year += tmp * 4;
+
+    /* Compute which year in the 4. */
+
+    tmp = rem / 365;
+    rem %= 365;
+    if (tmp == 4) {       /* the 4th year is a leap year */
+        tmp = 3;
+        rem = 365;
+    }
+
+    gmt->tm_year += tmp;
+    gmt->tm_yday = rem;
+    isLeap = IsLeapYear(gmt->tm_year);
+
+    /* Compute the month and day of month. */
+
+    for (tmp = 1; lastDayOfMonth[isLeap][tmp] < gmt->tm_yday; tmp++) {
+    }
+    gmt->tm_month = --tmp;
+    gmt->tm_mday = gmt->tm_yday - lastDayOfMonth[isLeap][tmp];
+
+    gmt->tm_params.tp_gmt_offset = 0;
+    gmt->tm_params.tp_dst_offset = 0;
+}
+
+
+/*
+ *------------------------------------------------------------------------
+ *
+ * PR_ExplodeTime --
+ *
+ *     Cf. struct tm *gmtime(const time_t *tp) and
+ *         struct tm *localtime(const time_t *tp)
+ *
+ *------------------------------------------------------------------------
+ */
+
+PR_IMPLEMENT(void)
+PR_ExplodeTime(
+    PRTime usecs,
+    PRTimeParamFn params,
+    PRExplodedTime *exploded)
+{
+    ComputeGMT(usecs, exploded);
+    exploded->tm_params = params(exploded);
+    ApplySecOffset(exploded, exploded->tm_params.tp_gmt_offset
+                   + exploded->tm_params.tp_dst_offset);
+}
+
+
+/*
+ *------------------------------------------------------------------------
+ *
+ * PR_ImplodeTime --
+ *
+ *     Cf. time_t mktime(struct tm *tp)
+ *     Note that 1 year has < 2^25 seconds.  So an PRInt32 is large enough.
+ *
+ *------------------------------------------------------------------------
+ */
+PR_IMPLEMENT(PRTime)
+PR_ImplodeTime(const PRExplodedTime *exploded)
+{
+    PRExplodedTime copy;
+    PRTime retVal;
+    PRInt64 secPerDay, usecPerSec;
+    PRInt64 temp;
+    PRInt64 numSecs64;
+    PRInt32 numDays;
+    PRInt32 numSecs;
+
+    /* Normalize first.  Do this on our copy */
+    copy = *exploded;
+    PR_NormalizeTime(&copy, PR_GMTParameters);
+
+    numDays = DAYS_BETWEEN_YEARS(1970, copy.tm_year);
+
+    numSecs = copy.tm_yday * 86400 + copy.tm_hour * 3600
+              + copy.tm_min * 60 + copy.tm_sec;
+
+    LL_I2L(temp, numDays);
+    LL_I2L(secPerDay, 86400);
+    LL_MUL(temp, temp, secPerDay);
+    LL_I2L(numSecs64, numSecs);
+    LL_ADD(numSecs64, numSecs64, temp);
+
+    /* apply the GMT and DST offsets */
+    LL_I2L(temp,  copy.tm_params.tp_gmt_offset);
+    LL_SUB(numSecs64, numSecs64, temp);
+    LL_I2L(temp,  copy.tm_params.tp_dst_offset);
+    LL_SUB(numSecs64, numSecs64, temp);
+
+    LL_I2L(usecPerSec, 1000000L);
+    LL_MUL(temp, numSecs64, usecPerSec);
+    LL_I2L(retVal, copy.tm_usec);
+    LL_ADD(retVal, retVal, temp);
+
+    return retVal;
+}
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * IsLeapYear --
+ *
+ *     Returns 1 if the year is a leap year, 0 otherwise.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+static int IsLeapYear(PRInt16 year)
+{
+    if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
+        return 1;
+    }
+    return 0;
+}
+
+/*
+ * 'secOffset' should be less than 86400 (i.e., a day).
+ * 'time' should point to a normalized PRExplodedTime.
+ */
+
+static void
+ApplySecOffset(PRExplodedTime *time, PRInt32 secOffset)
+{
+    time->tm_sec += secOffset;
+
+    /* Note that in this implementation we do not count leap seconds */
+    if (time->tm_sec < 0 || time->tm_sec >= 60) {
+        time->tm_min += time->tm_sec / 60;
+        time->tm_sec %= 60;
+        if (time->tm_sec < 0) {
+            time->tm_sec += 60;
+            time->tm_min--;
+        }
+    }
+
+    if (time->tm_min < 0 || time->tm_min >= 60) {
+        time->tm_hour += time->tm_min / 60;
+        time->tm_min %= 60;
+        if (time->tm_min < 0) {
+            time->tm_min += 60;
+            time->tm_hour--;
+        }
+    }
+
+    if (time->tm_hour < 0) {
+        /* Decrement mday, yday, and wday */
+        time->tm_hour += 24;
+        time->tm_mday--;
+        time->tm_yday--;
+        if (time->tm_mday < 1) {
+            time->tm_month--;
+            if (time->tm_month < 0) {
+                time->tm_month = 11;
+                time->tm_year--;
+                if (IsLeapYear(time->tm_year)) {
+                    time->tm_yday = 365;
+                }
+                else {
+                    time->tm_yday = 364;
+                }
+            }
+            time->tm_mday = nDays[IsLeapYear(time->tm_year)][time->tm_month];
+        }
+        time->tm_wday--;
+        if (time->tm_wday < 0) {
+            time->tm_wday = 6;
+        }
+    } else if (time->tm_hour > 23) {
+        /* Increment mday, yday, and wday */
+        time->tm_hour -= 24;
+        time->tm_mday++;
+        time->tm_yday++;
+        if (time->tm_mday >
+            nDays[IsLeapYear(time->tm_year)][time->tm_month]) {
+            time->tm_mday = 1;
+            time->tm_month++;
+            if (time->tm_month > 11) {
+                time->tm_month = 0;
+                time->tm_year++;
+                time->tm_yday = 0;
+            }
+        }
+        time->tm_wday++;
+        if (time->tm_wday > 6) {
+            time->tm_wday = 0;
+        }
+    }
+}
+
+PR_IMPLEMENT(void)
+PR_NormalizeTime(PRExplodedTime *time, PRTimeParamFn params)
+{
+    int daysInMonth;
+    PRInt32 numDays;
+
+    /* Get back to GMT */
+    time->tm_sec -= time->tm_params.tp_gmt_offset
+                    + time->tm_params.tp_dst_offset;
+    time->tm_params.tp_gmt_offset = 0;
+    time->tm_params.tp_dst_offset = 0;
+
+    /* Now normalize GMT */
+
+    if (time->tm_usec < 0 || time->tm_usec >= 1000000) {
+        time->tm_sec +=  time->tm_usec / 1000000;
+        time->tm_usec %= 1000000;
+        if (time->tm_usec < 0) {
+            time->tm_usec += 1000000;
+            time->tm_sec--;
+        }
+    }
+
+    /* Note that we do not count leap seconds in this implementation */
+    if (time->tm_sec < 0 || time->tm_sec >= 60) {
+        time->tm_min += time->tm_sec / 60;
+        time->tm_sec %= 60;
+        if (time->tm_sec < 0) {
+            time->tm_sec += 60;
+            time->tm_min--;
+        }
+    }
+
+    if (time->tm_min < 0 || time->tm_min >= 60) {
+        time->tm_hour += time->tm_min / 60;
+        time->tm_min %= 60;
+        if (time->tm_min < 0) {
+            time->tm_min += 60;
+            time->tm_hour--;
+        }
+    }
+
+    if (time->tm_hour < 0 || time->tm_hour >= 24) {
+        time->tm_mday += time->tm_hour / 24;
+        time->tm_hour %= 24;
+        if (time->tm_hour < 0) {
+            time->tm_hour += 24;
+            time->tm_mday--;
+        }
+    }
+
+    /* Normalize month and year before mday */
+    if (time->tm_month < 0 || time->tm_month >= 12) {
+        time->tm_year += time->tm_month / 12;
+        time->tm_month %= 12;
+        if (time->tm_month < 0) {
+            time->tm_month += 12;
+            time->tm_year--;
+        }
+    }
+
+    /* Now that month and year are in proper range, normalize mday */
+
+    if (time->tm_mday < 1) {
+        /* mday too small */
+        do {
+            /* the previous month */
+            time->tm_month--;
+            if (time->tm_month < 0) {
+                time->tm_month = 11;
+                time->tm_year--;
+            }
+            time->tm_mday += nDays[IsLeapYear(time->tm_year)][time->tm_month];
+        } while (time->tm_mday < 1);
+    } else {
+        daysInMonth = nDays[IsLeapYear(time->tm_year)][time->tm_month];
+        while (time->tm_mday > daysInMonth) {
+            /* mday too large */
+            time->tm_mday -= daysInMonth;
+            time->tm_month++;
+            if (time->tm_month > 11) {
+                time->tm_month = 0;
+                time->tm_year++;
+            }
+            daysInMonth = nDays[IsLeapYear(time->tm_year)][time->tm_month];
+        }
+    }
+
+    /* Recompute yday and wday */
+    time->tm_yday = time->tm_mday +
+                    lastDayOfMonth[IsLeapYear(time->tm_year)][time->tm_month];
+
+    numDays = DAYS_BETWEEN_YEARS(1970, time->tm_year) + time->tm_yday;
+    time->tm_wday = (numDays + 4) % 7;
+    if (time->tm_wday < 0) {
+        time->tm_wday += 7;
+    }
+
+    /* Recompute time parameters */
+
+    time->tm_params = params(time);
+
+    ApplySecOffset(time, time->tm_params.tp_gmt_offset
+                   + time->tm_params.tp_dst_offset);
+}
+
+
+/*
+ *-------------------------------------------------------------------------
+ *
+ * PR_LocalTimeParameters --
+ *
+ *     returns the time parameters for the local time zone
+ *
+ *     The following uses localtime() from the standard C library.
+ *     (time.h)  This is our fallback implementation.  Unix, PC, and BeOS
+ *     use this version.  A platform may have its own machine-dependent
+ *     implementation of this function.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#if defined(HAVE_INT_LOCALTIME_R)
+
+/*
+ * In this case we could define the macro as
+ *     #define MT_safe_localtime(timer, result) \
+ *             (localtime_r(timer, result) == 0 ? result : NULL)
+ * I chose to compare the return value of localtime_r with -1 so
+ * that I can catch the cases where localtime_r returns a pointer
+ * to struct tm.  The macro definition above would not be able to
+ * detect such mistakes because it is legal to compare a pointer
+ * with 0.
+ */
+
+#define MT_safe_localtime(timer, result) \
+        (localtime_r(timer, result) == -1 ? NULL: result)
+
+#elif defined(HAVE_POINTER_LOCALTIME_R)
+
+#define MT_safe_localtime localtime_r
+
+#elif defined(_MSC_VER)
+
+/* Visual C++ has had localtime_s() since Visual C++ 2005. */
+
+static struct tm *MT_safe_localtime(const time_t *clock, struct tm *result)
+{
+    errno_t err = localtime_s(result, clock);
+    if (err != 0) {
+        errno = err;
+        return NULL;
+    }
+    return result;
+}
+
+#else
+
+#define HAVE_LOCALTIME_MONITOR 1  /* We use 'monitor' to serialize our calls
+                                   * to localtime(). */
+static PRLock *monitor = NULL;
+
+static struct tm *MT_safe_localtime(const time_t *clock, struct tm *result)
+{
+    struct tm *tmPtr;
+    int needLock = PR_Initialized();  /* We need to use a lock to protect
+                                       * against NSPR threads only when the
+                                       * NSPR thread system is activated. */
+
+    if (needLock) {
+        PR_Lock(monitor);
+    }
+
+    /*
+     * Microsoft (all flavors) localtime() returns a NULL pointer if 'clock'
+     * represents a time before midnight January 1, 1970.  In
+     * that case, we also return a NULL pointer and the struct tm
+     * object pointed to by 'result' is not modified.
+     *
+     * Watcom C/C++ 11.0 localtime() treats time_t as unsigned long
+     * hence, does not recognize negative values of clock as pre-1/1/70.
+     * We have to manually check (WIN16 only) for negative value of
+     * clock and return NULL.
+     *
+     * With negative values of clock, OS/2 returns the struct tm for
+     * clock plus ULONG_MAX. So we also have to check for the invalid
+     * structs returned for timezones west of Greenwich when clock == 0.
+     */
+
+    tmPtr = localtime(clock);
+
+#if defined(WIN16) || defined(XP_OS2)
+    if ( (PRInt32) *clock < 0 ||
+         ( (PRInt32) *clock == 0 && tmPtr->tm_year != 70)) {
+        result = NULL;
+    }
+    else {
+        *result = *tmPtr;
+    }
+#else
+    if (tmPtr) {
+        *result = *tmPtr;
+    } else {
+        result = NULL;
+    }
+#endif /* WIN16 */
+
+    if (needLock) {
+        PR_Unlock(monitor);
+    }
+
+    return result;
+}
+
+#endif  /* definition of MT_safe_localtime() */
+
+void _PR_InitTime(void)
+{
+#ifdef HAVE_LOCALTIME_MONITOR
+    monitor = PR_NewLock();
+#endif
+#ifdef WINCE
+    _MD_InitTime();
+#endif
+}
+
+void _PR_CleanupTime(void)
+{
+#ifdef HAVE_LOCALTIME_MONITOR
+    if (monitor) {
+        PR_DestroyLock(monitor);
+        monitor = NULL;
+    }
+#endif
+#ifdef WINCE
+    _MD_CleanupTime();
+#endif
+}
+
+#if defined(XP_UNIX) || defined(XP_PC)
+
+PR_IMPLEMENT(PRTimeParameters)
+PR_LocalTimeParameters(const PRExplodedTime *gmt)
+{
+
+    PRTimeParameters retVal;
+    struct tm localTime;
+    struct tm *localTimeResult;
+    time_t secs;
+    PRTime secs64;
+    PRInt64 usecPerSec;
+    PRInt64 usecPerSec_1;
+    PRInt64 maxInt32;
+    PRInt64 minInt32;
+    PRInt32 dayOffset;
+    PRInt32 offset2Jan1970;
+    PRInt32 offsetNew;
+    int isdst2Jan1970;
+
+    /*
+     * Calculate the GMT offset.  First, figure out what is
+     * 00:00:00 Jan. 2, 1970 GMT (which is exactly a day, or 86400
+     * seconds, since the epoch) in local time.  Then we calculate
+     * the difference between local time and GMT in seconds:
+     *     gmt_offset = local_time - GMT
+     *
+     * Caveat: the validity of this calculation depends on two
+     * assumptions:
+     * 1. Daylight saving time was not in effect on Jan. 2, 1970.
+     * 2. The time zone of the geographic location has not changed
+     *    since Jan. 2, 1970.
+     */
+
+    secs = 86400L;
+    localTimeResult = MT_safe_localtime(&secs, &localTime);
+    PR_ASSERT(localTimeResult != NULL);
+    if (localTimeResult == NULL) {
+        /* Shouldn't happen. Use safe fallback for optimized builds. */
+        return PR_GMTParameters(gmt);
+    }
+
+    /* GMT is 00:00:00, 2nd of Jan. */
+
+    offset2Jan1970 = (PRInt32)localTime.tm_sec
+                     + 60L * (PRInt32)localTime.tm_min
+                     + 3600L * (PRInt32)localTime.tm_hour
+                     + 86400L * (PRInt32)((PRInt32)localTime.tm_mday - 2L);
+
+    isdst2Jan1970 = localTime.tm_isdst;
+
+    /*
+     * Now compute DST offset.  We calculate the overall offset
+     * of local time from GMT, similar to above.  The overall
+     * offset has two components: gmt offset and dst offset.
+     * We subtract gmt offset from the overall offset to get
+     * the dst offset.
+     *     overall_offset = local_time - GMT
+     *     overall_offset = gmt_offset + dst_offset
+     * ==> dst_offset = local_time - GMT - gmt_offset
+     */
+
+    secs64 = PR_ImplodeTime(gmt);    /* This is still in microseconds */
+    LL_I2L(usecPerSec, PR_USEC_PER_SEC);
+    LL_I2L(usecPerSec_1, PR_USEC_PER_SEC - 1);
+    /* Convert to seconds, truncating down (3.1 -> 3 and -3.1 -> -4) */
+    if (LL_GE_ZERO(secs64)) {
+        LL_DIV(secs64, secs64, usecPerSec);
+    } else {
+        LL_NEG(secs64, secs64);
+        LL_ADD(secs64, secs64, usecPerSec_1);
+        LL_DIV(secs64, secs64, usecPerSec);
+        LL_NEG(secs64, secs64);
+    }
+    LL_I2L(maxInt32, PR_INT32_MAX);
+    LL_I2L(minInt32, PR_INT32_MIN);
+    if (LL_CMP(secs64, >, maxInt32) || LL_CMP(secs64, <, minInt32)) {
+        /* secs64 is too large or too small for time_t (32-bit integer) */
+        retVal.tp_gmt_offset = offset2Jan1970;
+        retVal.tp_dst_offset = 0;
+        return retVal;
+    }
+    LL_L2I(secs, secs64);
+
+    /*
+     * On Windows, localtime() (and our MT_safe_localtime() too)
+     * returns a NULL pointer for time before midnight January 1,
+     * 1970 GMT.  In that case, we just use the GMT offset for
+     * Jan 2, 1970 and assume that DST was not in effect.
+     */
+
+    if (MT_safe_localtime(&secs, &localTime) == NULL) {
+        retVal.tp_gmt_offset = offset2Jan1970;
+        retVal.tp_dst_offset = 0;
+        return retVal;
+    }
+
+    /*
+     * dayOffset is the offset between local time and GMT in
+     * the day component, which can only be -1, 0, or 1.  We
+     * use the day of the week to compute dayOffset.
+     */
+
+    dayOffset = (PRInt32) localTime.tm_wday - gmt->tm_wday;
+
+    /*
+     * Need to adjust for wrapping around of day of the week from
+     * 6 back to 0.
+     */
+
+    if (dayOffset == -6) {
+        /* Local time is Sunday (0) and GMT is Saturday (6) */
+        dayOffset = 1;
+    } else if (dayOffset == 6) {
+        /* Local time is Saturday (6) and GMT is Sunday (0) */
+        dayOffset = -1;
+    }
+
+    offsetNew = (PRInt32)localTime.tm_sec - gmt->tm_sec
+                + 60L * ((PRInt32)localTime.tm_min - gmt->tm_min)
+                + 3600L * ((PRInt32)localTime.tm_hour - gmt->tm_hour)
+                + 86400L * (PRInt32)dayOffset;
+
+    if (localTime.tm_isdst <= 0) {
+        /* DST is not in effect */
+        retVal.tp_gmt_offset = offsetNew;
+        retVal.tp_dst_offset = 0;
+    } else {
+        /* DST is in effect */
+        if (isdst2Jan1970 <=0) {
+            /*
+             * DST was not in effect back in 2 Jan. 1970.
+             * Use the offset back then as the GMT offset,
+             * assuming the time zone has not changed since then.
+             */
+            retVal.tp_gmt_offset = offset2Jan1970;
+            retVal.tp_dst_offset = offsetNew - offset2Jan1970;
+        } else {
+            /*
+             * DST was also in effect back in 2 Jan. 1970.
+             * Then our clever trick (or rather, ugly hack) fails.
+             * We will just assume DST offset is an hour.
+             */
+            retVal.tp_gmt_offset = offsetNew - 3600;
+            retVal.tp_dst_offset = 3600;
+        }
+    }
+
+    return retVal;
+}
+
+#endif    /* defined(XP_UNIX) || defined(XP_PC) */
+
+/*
+ *------------------------------------------------------------------------
+ *
+ * PR_USPacificTimeParameters --
+ *
+ *     The time parameters function for the US Pacific Time Zone.
+ *
+ *------------------------------------------------------------------------
+ */
+
+/*
+ * Returns the mday of the first sunday of the month, where
+ * mday and wday are for a given day in the month.
+ * mdays start with 1 (e.g. 1..31).
+ * wdays start with 0 and are in the range 0..6.  0 = Sunday.
+ */
+#define firstSunday(mday, wday) (((mday - wday + 7 - 1) % 7) + 1)
+
+/*
+ * Returns the mday for the N'th Sunday of the month, where
+ * mday and wday are for a given day in the month.
+ * mdays start with 1 (e.g. 1..31).
+ * wdays start with 0 and are in the range 0..6.  0 = Sunday.
+ * N has the following values: 0 = first, 1 = second (etc), -1 = last.
+ * ndays is the number of days in that month, the same value as the
+ * mday of the last day of the month.
+ */
+static PRInt32
+NthSunday(PRInt32 mday, PRInt32 wday, PRInt32 N, PRInt32 ndays)
+{
+    PRInt32 firstSun = firstSunday(mday, wday);
+
+    if (N < 0) {
+        N = (ndays - firstSun) / 7;
+    }
+    return firstSun + (7 * N);
+}
+
+typedef struct DSTParams {
+    PRInt8 dst_start_month;       /* 0 = January */
+    PRInt8 dst_start_Nth_Sunday;  /* N as defined above */
+    PRInt8 dst_start_month_ndays; /* ndays as defined above */
+    PRInt8 dst_end_month;         /* 0 = January */
+    PRInt8 dst_end_Nth_Sunday;    /* N as defined above */
+    PRInt8 dst_end_month_ndays;   /* ndays as defined above */
+} DSTParams;
+
+static const DSTParams dstParams[2] = {
+    /* year < 2007:  First April Sunday - Last October Sunday */
+    { 3, 0, 30, 9, -1, 31 },
+    /* year >= 2007: Second March Sunday - First November Sunday */
+    { 2, 1, 31, 10, 0, 30 }
+};
+
+PR_IMPLEMENT(PRTimeParameters)
+PR_USPacificTimeParameters(const PRExplodedTime *gmt)
+{
+    const DSTParams *dst;
+    PRTimeParameters retVal;
+    PRExplodedTime st;
+
+    /*
+     * Based on geographic location and GMT, figure out offset of
+     * standard time from GMT.  In this example implementation, we
+     * assume the local time zone is US Pacific Time.
+     */
+
+    retVal.tp_gmt_offset = -8L * 3600L;
+
+    /*
+     * Make a copy of GMT.  Note that the tm_params field of this copy
+     * is ignored.
+     */
+
+    st.tm_usec = gmt->tm_usec;
+    st.tm_sec = gmt->tm_sec;
+    st.tm_min = gmt->tm_min;
+    st.tm_hour = gmt->tm_hour;
+    st.tm_mday = gmt->tm_mday;
+    st.tm_month = gmt->tm_month;
+    st.tm_year = gmt->tm_year;
+    st.tm_wday = gmt->tm_wday;
+    st.tm_yday = gmt->tm_yday;
+
+    /* Apply the offset to GMT to obtain the local standard time */
+    ApplySecOffset(&st, retVal.tp_gmt_offset);
+
+    if (st.tm_year < 2007) { /* first April Sunday - Last October Sunday */
+        dst = &dstParams[0];
+    } else {                 /* Second March Sunday - First November Sunday */
+        dst = &dstParams[1];
+    }
+
+    /*
+     * Apply the rules on standard time or GMT to obtain daylight saving
+     * time offset.  In this implementation, we use the US DST rule.
+     */
+    if (st.tm_month < dst->dst_start_month) {
+        retVal.tp_dst_offset = 0L;
+    } else if (st.tm_month == dst->dst_start_month) {
+        int NthSun = NthSunday(st.tm_mday, st.tm_wday,
+                               dst->dst_start_Nth_Sunday,
+                               dst->dst_start_month_ndays);
+        if (st.tm_mday < NthSun) {              /* Before starting Sunday */
+            retVal.tp_dst_offset = 0L;
+        } else if (st.tm_mday == NthSun) {      /* Starting Sunday */
+            /* 01:59:59 PST -> 03:00:00 PDT */
+            if (st.tm_hour < 2) {
+                retVal.tp_dst_offset = 0L;
+            } else {
+                retVal.tp_dst_offset = 3600L;
+            }
+        } else {                                /* After starting Sunday */
+            retVal.tp_dst_offset = 3600L;
+        }
+    } else if (st.tm_month < dst->dst_end_month) {
+        retVal.tp_dst_offset = 3600L;
+    } else if (st.tm_month == dst->dst_end_month) {
+        int NthSun = NthSunday(st.tm_mday, st.tm_wday,
+                               dst->dst_end_Nth_Sunday,
+                               dst->dst_end_month_ndays);
+        if (st.tm_mday < NthSun) {              /* Before ending Sunday */
+            retVal.tp_dst_offset = 3600L;
+        } else if (st.tm_mday == NthSun) {      /* Ending Sunday */
+            /* 01:59:59 PDT -> 01:00:00 PST */
+            if (st.tm_hour < 1) {
+                retVal.tp_dst_offset = 3600L;
+            } else {
+                retVal.tp_dst_offset = 0L;
+            }
+        } else {                                /* After ending Sunday */
+            retVal.tp_dst_offset = 0L;
+        }
+    } else {
+        retVal.tp_dst_offset = 0L;
+    }
+    return retVal;
+}
+
+/*
+ *------------------------------------------------------------------------
+ *
+ * PR_GMTParameters --
+ *
+ *     Returns the PRTimeParameters for Greenwich Mean Time.
+ *     Trivially, both the tp_gmt_offset and tp_dst_offset fields are 0.
+ *
+ *------------------------------------------------------------------------
+ */
+
+PR_IMPLEMENT(PRTimeParameters)
+PR_GMTParameters(const PRExplodedTime *gmt)
+{
+    PRTimeParameters retVal = { 0, 0 };
+    return retVal;
+}
+
+/*
+ * The following code implements PR_ParseTimeString().  It is based on
+ * ns/lib/xp/xp_time.c, revision 1.25, by Jamie Zawinski <jwz@netscape.com>.
+ */
+
+/*
+ * We only recognize the abbreviations of a small subset of time zones
+ * in North America, Europe, and Japan.
+ *
+ * PST/PDT: Pacific Standard/Daylight Time
+ * MST/MDT: Mountain Standard/Daylight Time
+ * CST/CDT: Central Standard/Daylight Time
+ * EST/EDT: Eastern Standard/Daylight Time
+ * AST: Atlantic Standard Time
+ * NST: Newfoundland Standard Time
+ * GMT: Greenwich Mean Time
+ * BST: British Summer Time
+ * MET: Middle Europe Time
+ * EET: Eastern Europe Time
+ * JST: Japan Standard Time
+ */
+
+typedef enum
+{
+    TT_UNKNOWN,
+
+    TT_SUN, TT_MON, TT_TUE, TT_WED, TT_THU, TT_FRI, TT_SAT,
+
+    TT_JAN, TT_FEB, TT_MAR, TT_APR, TT_MAY, TT_JUN,
+    TT_JUL, TT_AUG, TT_SEP, TT_OCT, TT_NOV, TT_DEC,
+
+    TT_PST, TT_PDT, TT_MST, TT_MDT, TT_CST, TT_CDT, TT_EST, TT_EDT,
+    TT_AST, TT_NST, TT_GMT, TT_BST, TT_MET, TT_EET, TT_JST
+} TIME_TOKEN;
+
+/*
+ * This parses a time/date string into a PRTime
+ * (microseconds after "1-Jan-1970 00:00:00 GMT").
+ * It returns PR_SUCCESS on success, and PR_FAILURE
+ * if the time/date string can't be parsed.
+ *
+ * Many formats are handled, including:
+ *
+ *   14 Apr 89 03:20:12
+ *   14 Apr 89 03:20 GMT
+ *   Fri, 17 Mar 89 4:01:33
+ *   Fri, 17 Mar 89 4:01 GMT
+ *   Mon Jan 16 16:12 PDT 1989
+ *   Mon Jan 16 16:12 +0130 1989
+ *   6 May 1992 16:41-JST (Wednesday)
+ *   22-AUG-1993 10:59:12.82
+ *   22-AUG-1993 10:59pm
+ *   22-AUG-1993 12:59am
+ *   22-AUG-1993 12:59 PM
+ *   Friday, August 04, 1995 3:54 PM
+ *   06/21/95 04:24:34 PM
+ *   20/06/95 21:07
+ *   95-06-08 19:32:48 EDT
+ *
+ * If the input string doesn't contain a description of the timezone,
+ * we consult the `default_to_gmt' to decide whether the string should
+ * be interpreted relative to the local time zone (PR_FALSE) or GMT (PR_TRUE).
+ * The correct value for this argument depends on what standard specified
+ * the time string which you are parsing.
+ */
+
+PR_IMPLEMENT(PRStatus)
+PR_ParseTimeStringToExplodedTime(
+    const char *string,
+    PRBool default_to_gmt,
+    PRExplodedTime *result)
+{
+    TIME_TOKEN dotw = TT_UNKNOWN;
+    TIME_TOKEN month = TT_UNKNOWN;
+    TIME_TOKEN zone = TT_UNKNOWN;
+    int zone_offset = -1;
+    int dst_offset = 0;
+    int date = -1;
+    PRInt32 year = -1;
+    int hour = -1;
+    int min = -1;
+    int sec = -1;
+    struct tm *localTimeResult;
+
+    const char *rest = string;
+
+    int iterations = 0;
+
+    PR_ASSERT(string && result);
+    if (!string || !result) {
+        return PR_FAILURE;
+    }
+
+    while (*rest)
+    {
+
+        if (iterations++ > 1000)
+        {
+            return PR_FAILURE;
+        }
+
+        switch (*rest)
+        {
+            case 'a': case 'A':
+                if (month == TT_UNKNOWN &&
+                    (rest[1] == 'p' || rest[1] == 'P') &&
+                    (rest[2] == 'r' || rest[2] == 'R')) {
+                    month = TT_APR;
+                }
+                else if (zone == TT_UNKNOWN &&
+                         (rest[1] == 's' || rest[1] == 'S') &&
+                         (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_AST;
+                }
+                else if (month == TT_UNKNOWN &&
+                         (rest[1] == 'u' || rest[1] == 'U') &&
+                         (rest[2] == 'g' || rest[2] == 'G')) {
+                    month = TT_AUG;
+                }
+                break;
+            case 'b': case 'B':
+                if (zone == TT_UNKNOWN &&
+                    (rest[1] == 's' || rest[1] == 'S') &&
+                    (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_BST;
+                }
+                break;
+            case 'c': case 'C':
+                if (zone == TT_UNKNOWN &&
+                    (rest[1] == 'd' || rest[1] == 'D') &&
+                    (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_CDT;
+                }
+                else if (zone == TT_UNKNOWN &&
+                         (rest[1] == 's' || rest[1] == 'S') &&
+                         (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_CST;
+                }
+                break;
+            case 'd': case 'D':
+                if (month == TT_UNKNOWN &&
+                    (rest[1] == 'e' || rest[1] == 'E') &&
+                    (rest[2] == 'c' || rest[2] == 'C')) {
+                    month = TT_DEC;
+                }
+                break;
+            case 'e': case 'E':
+                if (zone == TT_UNKNOWN &&
+                    (rest[1] == 'd' || rest[1] == 'D') &&
+                    (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_EDT;
+                }
+                else if (zone == TT_UNKNOWN &&
+                         (rest[1] == 'e' || rest[1] == 'E') &&
+                         (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_EET;
+                }
+                else if (zone == TT_UNKNOWN &&
+                         (rest[1] == 's' || rest[1] == 'S') &&
+                         (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_EST;
+                }
+                break;
+            case 'f': case 'F':
+                if (month == TT_UNKNOWN &&
+                    (rest[1] == 'e' || rest[1] == 'E') &&
+                    (rest[2] == 'b' || rest[2] == 'B')) {
+                    month = TT_FEB;
+                }
+                else if (dotw == TT_UNKNOWN &&
+                         (rest[1] == 'r' || rest[1] == 'R') &&
+                         (rest[2] == 'i' || rest[2] == 'I')) {
+                    dotw = TT_FRI;
+                }
+                break;
+            case 'g': case 'G':
+                if (zone == TT_UNKNOWN &&
+                    (rest[1] == 'm' || rest[1] == 'M') &&
+                    (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_GMT;
+                }
+                break;
+            case 'j': case 'J':
+                if (month == TT_UNKNOWN &&
+                    (rest[1] == 'a' || rest[1] == 'A') &&
+                    (rest[2] == 'n' || rest[2] == 'N')) {
+                    month = TT_JAN;
+                }
+                else if (zone == TT_UNKNOWN &&
+                         (rest[1] == 's' || rest[1] == 'S') &&
+                         (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_JST;
+                }
+                else if (month == TT_UNKNOWN &&
+                         (rest[1] == 'u' || rest[1] == 'U') &&
+                         (rest[2] == 'l' || rest[2] == 'L')) {
+                    month = TT_JUL;
+                }
+                else if (month == TT_UNKNOWN &&
+                         (rest[1] == 'u' || rest[1] == 'U') &&
+                         (rest[2] == 'n' || rest[2] == 'N')) {
+                    month = TT_JUN;
+                }
+                break;
+            case 'm': case 'M':
+                if (month == TT_UNKNOWN &&
+                    (rest[1] == 'a' || rest[1] == 'A') &&
+                    (rest[2] == 'r' || rest[2] == 'R')) {
+                    month = TT_MAR;
+                }
+                else if (month == TT_UNKNOWN &&
+                         (rest[1] == 'a' || rest[1] == 'A') &&
+                         (rest[2] == 'y' || rest[2] == 'Y')) {
+                    month = TT_MAY;
+                }
+                else if (zone == TT_UNKNOWN &&
+                         (rest[1] == 'd' || rest[1] == 'D') &&
+                         (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_MDT;
+                }
+                else if (zone == TT_UNKNOWN &&
+                         (rest[1] == 'e' || rest[1] == 'E') &&
+                         (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_MET;
+                }
+                else if (dotw == TT_UNKNOWN &&
+                         (rest[1] == 'o' || rest[1] == 'O') &&
+                         (rest[2] == 'n' || rest[2] == 'N')) {
+                    dotw = TT_MON;
+                }
+                else if (zone == TT_UNKNOWN &&
+                         (rest[1] == 's' || rest[1] == 'S') &&
+                         (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_MST;
+                }
+                break;
+            case 'n': case 'N':
+                if (month == TT_UNKNOWN &&
+                    (rest[1] == 'o' || rest[1] == 'O') &&
+                    (rest[2] == 'v' || rest[2] == 'V')) {
+                    month = TT_NOV;
+                }
+                else if (zone == TT_UNKNOWN &&
+                         (rest[1] == 's' || rest[1] == 'S') &&
+                         (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_NST;
+                }
+                break;
+            case 'o': case 'O':
+                if (month == TT_UNKNOWN &&
+                    (rest[1] == 'c' || rest[1] == 'C') &&
+                    (rest[2] == 't' || rest[2] == 'T')) {
+                    month = TT_OCT;
+                }
+                break;
+            case 'p': case 'P':
+                if (zone == TT_UNKNOWN &&
+                    (rest[1] == 'd' || rest[1] == 'D') &&
+                    (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_PDT;
+                }
+                else if (zone == TT_UNKNOWN &&
+                         (rest[1] == 's' || rest[1] == 'S') &&
+                         (rest[2] == 't' || rest[2] == 'T')) {
+                    zone = TT_PST;
+                }
+                break;
+            case 's': case 'S':
+                if (dotw == TT_UNKNOWN &&
+                    (rest[1] == 'a' || rest[1] == 'A') &&
+                    (rest[2] == 't' || rest[2] == 'T')) {
+                    dotw = TT_SAT;
+                }
+                else if (month == TT_UNKNOWN &&
+                         (rest[1] == 'e' || rest[1] == 'E') &&
+                         (rest[2] == 'p' || rest[2] == 'P')) {
+                    month = TT_SEP;
+                }
+                else if (dotw == TT_UNKNOWN &&
+                         (rest[1] == 'u' || rest[1] == 'U') &&
+                         (rest[2] == 'n' || rest[2] == 'N')) {
+                    dotw = TT_SUN;
+                }
+                break;
+            case 't': case 'T':
+                if (dotw == TT_UNKNOWN &&
+                    (rest[1] == 'h' || rest[1] == 'H') &&
+                    (rest[2] == 'u' || rest[2] == 'U')) {
+                    dotw = TT_THU;
+                }
+                else if (dotw == TT_UNKNOWN &&
+                         (rest[1] == 'u' || rest[1] == 'U') &&
+                         (rest[2] == 'e' || rest[2] == 'E')) {
+                    dotw = TT_TUE;
+                }
+                break;
+            case 'u': case 'U':
+                if (zone == TT_UNKNOWN &&
+                    (rest[1] == 't' || rest[1] == 'T') &&
+                    !(rest[2] >= 'A' && rest[2] <= 'Z') &&
+                    !(rest[2] >= 'a' && rest[2] <= 'z'))
+                    /* UT is the same as GMT but UTx is not. */
+                {
+                    zone = TT_GMT;
+                }
+                break;
+            case 'w': case 'W':
+                if (dotw == TT_UNKNOWN &&
+                    (rest[1] == 'e' || rest[1] == 'E') &&
+                    (rest[2] == 'd' || rest[2] == 'D')) {
+                    dotw = TT_WED;
+                }
+                break;
+
+            case '+': case '-':
+            {
+                const char *end;
+                int sign;
+                if (zone_offset != -1)
+                {
+                    /* already got one... */
+                    rest++;
+                    break;
+                }
+                if (zone != TT_UNKNOWN && zone != TT_GMT)
+                {
+                    /* GMT+0300 is legal, but PST+0300 is not. */
+                    rest++;
+                    break;
+                }
+
+                sign = ((*rest == '+') ? 1 : -1);
+                rest++; /* move over sign */
+                end = rest;
+                while (*end >= '0' && *end <= '9') {
+                    end++;
+                }
+                if (rest == end) { /* no digits here */
+                    break;
+                }
+
+                if ((end - rest) == 4)
+                    /* offset in HHMM */
+                    zone_offset = (((((rest[0]-'0')*10) + (rest[1]-'0')) * 60) +
+                                   (((rest[2]-'0')*10) + (rest[3]-'0')));
+                else if ((end - rest) == 2)
+                    /* offset in hours */
+                {
+                    zone_offset = (((rest[0]-'0')*10) + (rest[1]-'0')) * 60;
+                }
+                else if ((end - rest) == 1)
+                    /* offset in hours */
+                {
+                    zone_offset = (rest[0]-'0') * 60;
+                }
+                else
+                    /* 3 or >4 */
+                {
+                    break;
+                }
+
+                zone_offset *= sign;
+                zone = TT_GMT;
+                break;
+            }
+
+            case '0': case '1': case '2': case '3': case '4':
+            case '5': case '6': case '7': case '8': case '9':
+            {
+                int tmp_hour = -1;
+                int tmp_min = -1;
+                int tmp_sec = -1;
+                const char *end = rest + 1;
+                while (*end >= '0' && *end <= '9') {
+                    end++;
+                }
+
+                /* end is now the first character after a range of digits. */
+
+                if (*end == ':')
+                {
+                    if (hour >= 0 && min >= 0) { /* already got it */
+                        break;
+                    }
+
+                    /* We have seen "[0-9]+:", so this is probably HH:MM[:SS] */
+                    if ((end - rest) > 2)
+                        /* it is [0-9][0-9][0-9]+: */
+                    {
+                        break;
+                    }
+                    if ((end - rest) == 2)
+                        tmp_hour = ((rest[0]-'0')*10 +
+                                    (rest[1]-'0'));
+                    else {
+                        tmp_hour = (rest[0]-'0');
+                    }
+
+                    /* move over the colon, and parse minutes */
+
+                    rest = ++end;
+                    while (*end >= '0' && *end <= '9') {
+                        end++;
+                    }
+
+                    if (end == rest)
+                        /* no digits after first colon? */
+                    {
+                        break;
+                    }
+                    if ((end - rest) > 2)
+                        /* it is [0-9][0-9][0-9]+: */
+                    {
+                        break;
+                    }
+                    if ((end - rest) == 2)
+                        tmp_min = ((rest[0]-'0')*10 +
+                                   (rest[1]-'0'));
+                    else {
+                        tmp_min = (rest[0]-'0');
+                    }
+
+                    /* now go for seconds */
+                    rest = end;
+                    if (*rest == ':') {
+                        rest++;
+                    }
+                    end = rest;
+                    while (*end >= '0' && *end <= '9') {
+                        end++;
+                    }
+
+                    if (end == rest)
+                        /* no digits after second colon - that's ok. */
+                        ;
+                    else if ((end - rest) > 2)
+                        /* it is [0-9][0-9][0-9]+: */
+                    {
+                        break;
+                    }
+                    if ((end - rest) == 2)
+                        tmp_sec = ((rest[0]-'0')*10 +
+                                   (rest[1]-'0'));
+                    else {
+                        tmp_sec = (rest[0]-'0');
+                    }
+
+                    /* If we made it here, we've parsed hour and min,
+                       and possibly sec, so it worked as a unit. */
+
+                    /* skip over whitespace and see if there's an AM or PM
+                       directly following the time.
+                     */
+                    if (tmp_hour <= 12)
+                    {
+                        const char *s = end;
+                        while (*s && (*s == ' ' || *s == '\t')) {
+                            s++;
+                        }
+                        if ((s[0] == 'p' || s[0] == 'P') &&
+                            (s[1] == 'm' || s[1] == 'M'))
+                            /* 10:05pm == 22:05, and 12:05pm == 12:05 */
+                        {
+                            tmp_hour = (tmp_hour == 12 ? 12 : tmp_hour + 12);
+                        }
+                        else if (tmp_hour == 12 &&
+                                 (s[0] == 'a' || s[0] == 'A') &&
+                                 (s[1] == 'm' || s[1] == 'M'))
+                            /* 12:05am == 00:05 */
+                        {
+                            tmp_hour = 0;
+                        }
+                    }
+
+                    hour = tmp_hour;
+                    min = tmp_min;
+                    sec = tmp_sec;
+                    rest = end;
+                    break;
+                }
+                if ((*end == '/' || *end == '-') &&
+                    end[1] >= '0' && end[1] <= '9')
+                {
+                    /* Perhaps this is 6/16/95, 16/6/95, 6-16-95, or 16-6-95
+                       or even 95-06-05...
+                       #### But it doesn't handle 1995-06-22.
+                     */
+                    int n1, n2, n3;
+                    const char *s;
+
+                    if (month != TT_UNKNOWN)
+                        /* if we saw a month name, this can't be. */
+                    {
+                        break;
+                    }
+
+                    s = rest;
+
+                    n1 = (*s++ - '0');                                /* first 1 or 2 digits */
+                    if (*s >= '0' && *s <= '9') {
+                        n1 = n1*10 + (*s++ - '0');
+                    }
+
+                    if (*s != '/' && *s != '-') {              /* slash */
+                        break;
+                    }
+                    s++;
+
+                    if (*s < '0' || *s > '9') {              /* second 1 or 2 digits */
+                        break;
+                    }
+                    n2 = (*s++ - '0');
+                    if (*s >= '0' && *s <= '9') {
+                        n2 = n2*10 + (*s++ - '0');
+                    }
+
+                    if (*s != '/' && *s != '-') {              /* slash */
+                        break;
+                    }
+                    s++;
+
+                    if (*s < '0' || *s > '9') {              /* third 1, 2, 4, or 5 digits */
+                        break;
+                    }
+                    n3 = (*s++ - '0');
+                    if (*s >= '0' && *s <= '9') {
+                        n3 = n3*10 + (*s++ - '0');
+                    }
+
+                    if (*s >= '0' && *s <= '9')            /* optional digits 3, 4, and 5 */
+                    {
+                        n3 = n3*10 + (*s++ - '0');
+                        if (*s < '0' || *s > '9') {
+                            break;
+                        }
+                        n3 = n3*10 + (*s++ - '0');
+                        if (*s >= '0' && *s <= '9') {
+                            n3 = n3*10 + (*s++ - '0');
+                        }
+                    }
+
+                    if ((*s >= '0' && *s <= '9') ||        /* followed by non-alphanum */
+                        (*s >= 'A' && *s <= 'Z') ||
+                        (*s >= 'a' && *s <= 'z')) {
+                        break;
+                    }
+
+                    /* Ok, we parsed three 1-2 digit numbers, with / or -
+                       between them.  Now decide what the hell they are
+                       (DD/MM/YY or MM/DD/YY or YY/MM/DD.)
+                     */
+
+                    if (n1 > 31 || n1 == 0)  /* must be YY/MM/DD */
+                    {
+                        if (n2 > 12) {
+                            break;
+                        }
+                        if (n3 > 31) {
+                            break;
+                        }
+                        year = n1;
+                        if (year < 70) {
+                            year += 2000;
+                        }
+                        else if (year < 100) {
+                            year += 1900;
+                        }
+                        month = (TIME_TOKEN)(n2 + ((int)TT_JAN) - 1);
+                        date = n3;
+                        rest = s;
+                        break;
+                    }
+
+                    if (n1 > 12 && n2 > 12)  /* illegal */
+                    {
+                        rest = s;
+                        break;
+                    }
+
+                    if (n3 < 70) {
+                        n3 += 2000;
+                    }
+                    else if (n3 < 100) {
+                        n3 += 1900;
+                    }
+
+                    if (n1 > 12)  /* must be DD/MM/YY */
+                    {
+                        date = n1;
+                        month = (TIME_TOKEN)(n2 + ((int)TT_JAN) - 1);
+                        year = n3;
+                    }
+                    else                  /* assume MM/DD/YY */
+                    {
+                        /* #### In the ambiguous case, should we consult the
+                           locale to find out the local default? */
+                        month = (TIME_TOKEN)(n1 + ((int)TT_JAN) - 1);
+                        date = n2;
+                        year = n3;
+                    }
+                    rest = s;
+                }
+                else if ((*end >= 'A' && *end <= 'Z') ||
+                         (*end >= 'a' && *end <= 'z'))
+                    /* Digits followed by non-punctuation - what's that? */
+                    ;
+                else if ((end - rest) == 5)                /* five digits is a year */
+                    year = (year < 0
+                            ? ((rest[0]-'0')*10000L +
+                               (rest[1]-'0')*1000L +
+                               (rest[2]-'0')*100L +
+                               (rest[3]-'0')*10L +
+                               (rest[4]-'0'))
+                            : year);
+                else if ((end - rest) == 4)                /* four digits is a year */
+                    year = (year < 0
+                            ? ((rest[0]-'0')*1000L +
+                               (rest[1]-'0')*100L +
+                               (rest[2]-'0')*10L +
+                               (rest[3]-'0'))
+                            : year);
+                else if ((end - rest) == 2)                /* two digits - date or year */
+                {
+                    int n = ((rest[0]-'0')*10 +
+                             (rest[1]-'0'));
+                    /* If we don't have a date (day of the month) and we see a number
+                         less than 32, then assume that is the date.
+
+                             Otherwise, if we have a date and not a year, assume this is the
+                             year.  If it is less than 70, then assume it refers to the 21st
+                             century.  If it is two digits (>= 70), assume it refers to this
+                             century.  Otherwise, assume it refers to an unambiguous year.
+
+                             The world will surely end soon.
+                       */
+                    if (date < 0 && n < 32) {
+                        date = n;
+                    }
+                    else if (year < 0)
+                    {
+                        if (n < 70) {
+                            year = 2000 + n;
+                        }
+                        else if (n < 100) {
+                            year = 1900 + n;
+                        }
+                        else {
+                            year = n;
+                        }
+                    }
+                    /* else what the hell is this. */
+                }
+                else if ((end - rest) == 1) {              /* one digit - date */
+                    date = (date < 0 ? (rest[0]-'0') : date);
+                }
+                /* else, three or more than five digits - what's that? */
+
+                break;
+            }
+        }
+
+        /* Skip to the end of this token, whether we parsed it or not.
+               Tokens are delimited by whitespace, or ,;-/
+               But explicitly not :+-.
+         */
+        while (*rest &&
+               *rest != ' ' && *rest != '\t' &&
+               *rest != ',' && *rest != ';' &&
+               *rest != '-' && *rest != '+' &&
+               *rest != '/' &&
+               *rest != '(' && *rest != ')' && *rest != '[' && *rest != ']') {
+            rest++;
+        }
+        /* skip over uninteresting chars. */
+SKIP_MORE:
+        while (*rest &&
+               (*rest == ' ' || *rest == '\t' ||
+                *rest == ',' || *rest == ';' || *rest == '/' ||
+                *rest == '(' || *rest == ')' || *rest == '[' || *rest == ']')) {
+            rest++;
+        }
+
+        /* "-" is ignored at the beginning of a token if we have not yet
+               parsed a year (e.g., the second "-" in "30-AUG-1966"), or if
+               the character after the dash is not a digit. */
+        if (*rest == '-' && ((rest > string &&
+                              isalpha((unsigned char)rest[-1]) && year < 0) ||
+                             rest[1] < '0' || rest[1] > '9'))
+        {
+            rest++;
+            goto SKIP_MORE;
+        }
+
+    }
+
+    if (zone != TT_UNKNOWN && zone_offset == -1)
+    {
+        switch (zone)
+        {
+            case TT_PST: zone_offset = -8 * 60; break;
+            case TT_PDT: zone_offset = -8 * 60; dst_offset = 1 * 60; break;
+            case TT_MST: zone_offset = -7 * 60; break;
+            case TT_MDT: zone_offset = -7 * 60; dst_offset = 1 * 60; break;
+            case TT_CST: zone_offset = -6 * 60; break;
+            case TT_CDT: zone_offset = -6 * 60; dst_offset = 1 * 60; break;
+            case TT_EST: zone_offset = -5 * 60; break;
+            case TT_EDT: zone_offset = -5 * 60; dst_offset = 1 * 60; break;
+            case TT_AST: zone_offset = -4 * 60; break;
+            case TT_NST: zone_offset = -3 * 60 - 30; break;
+            case TT_GMT: zone_offset =  0 * 60; break;
+            case TT_BST: zone_offset =  0 * 60; dst_offset = 1 * 60; break;
+            case TT_MET: zone_offset =  1 * 60; break;
+            case TT_EET: zone_offset =  2 * 60; break;
+            case TT_JST: zone_offset =  9 * 60; break;
+            default:
+                PR_ASSERT (0);
+                break;
+        }
+    }
+
+    /* If we didn't find a year, month, or day-of-the-month, we can't
+           possibly parse this, and in fact, mktime() will do something random
+           (I'm seeing it return "Tue Feb  5 06:28:16 2036", which is no doubt
+           a numerologically significant date... */
+    if (month == TT_UNKNOWN || date == -1 || year == -1 || year > PR_INT16_MAX) {
+        return PR_FAILURE;
+    }
+
+    memset(result, 0, sizeof(*result));
+    if (sec != -1) {
+        result->tm_sec = sec;
+    }
+    if (min != -1) {
+        result->tm_min = min;
+    }
+    if (hour != -1) {
+        result->tm_hour = hour;
+    }
+    if (date != -1) {
+        result->tm_mday = date;
+    }
+    if (month != TT_UNKNOWN) {
+        result->tm_month = (((int)month) - ((int)TT_JAN));
+    }
+    if (year != -1) {
+        result->tm_year = year;
+    }
+    if (dotw != TT_UNKNOWN) {
+        result->tm_wday = (((int)dotw) - ((int)TT_SUN));
+    }
+    /*
+     * Mainly to compute wday and yday, but normalized time is also required
+     * by the check below that works around a Visual C++ 2005 mktime problem.
+     */
+    PR_NormalizeTime(result, PR_GMTParameters);
+    /* The remaining work is to set the gmt and dst offsets in tm_params. */
+
+    if (zone == TT_UNKNOWN && default_to_gmt)
+    {
+        /* No zone was specified, so pretend the zone was GMT. */
+        zone = TT_GMT;
+        zone_offset = 0;
+    }
+
+    if (zone_offset == -1)
+    {
+        /* no zone was specified, and we're to assume that everything
+          is local. */
+        struct tm localTime;
+        time_t secs;
+
+        PR_ASSERT(result->tm_month > -1 &&
+                  result->tm_mday > 0 &&
+                  result->tm_hour > -1 &&
+                  result->tm_min > -1 &&
+                  result->tm_sec > -1);
+
+        /*
+         * To obtain time_t from a tm structure representing the local
+         * time, we call mktime().  However, we need to see if we are
+         * on 1-Jan-1970 or before.  If we are, we can't call mktime()
+         * because mktime() will crash on win16. In that case, we
+         * calculate zone_offset based on the zone offset at
+         * 00:00:00, 2 Jan 1970 GMT, and subtract zone_offset from the
+         * date we are parsing to transform the date to GMT.  We also
+         * do so if mktime() returns (time_t) -1 (time out of range).
+        */
+
+        /* month, day, hours, mins and secs are always non-negative
+           so we dont need to worry about them. */
+        if(result->tm_year >= 1970)
+        {
+            PRInt64 usec_per_sec;
+
+            localTime.tm_sec = result->tm_sec;
+            localTime.tm_min = result->tm_min;
+            localTime.tm_hour = result->tm_hour;
+            localTime.tm_mday = result->tm_mday;
+            localTime.tm_mon = result->tm_month;
+            localTime.tm_year = result->tm_year - 1900;
+            /* Set this to -1 to tell mktime "I don't care".  If you set
+               it to 0 or 1, you are making assertions about whether the
+               date you are handing it is in daylight savings mode or not;
+               and if you're wrong, it will "fix" it for you. */
+            localTime.tm_isdst = -1;
+
+#if _MSC_VER == 1400  /* 1400 = Visual C++ 2005 (8.0) */
+            /*
+             * mktime will return (time_t) -1 if the input is a date
+             * after 23:59:59, December 31, 3000, US Pacific Time (not
+             * UTC as documented):
+             * http://msdn.microsoft.com/en-us/library/d1y53h2a(VS.80).aspx
+             * But if the year is 3001, mktime also invokes the invalid
+             * parameter handler, causing the application to crash.  This
+             * problem has been reported in
+             * http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=266036.
+             * We avoid this crash by not calling mktime if the date is
+             * out of range.  To use a simple test that works in any time
+             * zone, we consider year 3000 out of range as well.  (See
+             * bug 480740.)
+             */
+            if (result->tm_year >= 3000) {
+                /* Emulate what mktime would have done. */
+                errno = EINVAL;
+                secs = (time_t) -1;
+            } else {
+                secs = mktime(&localTime);
+            }
+#else
+            secs = mktime(&localTime);
+#endif
+            if (secs != (time_t) -1)
+            {
+                PRTime usecs64;
+                LL_I2L(usecs64, secs);
+                LL_I2L(usec_per_sec, PR_USEC_PER_SEC);
+                LL_MUL(usecs64, usecs64, usec_per_sec);
+                PR_ExplodeTime(usecs64, PR_LocalTimeParameters, result);
+                return PR_SUCCESS;
+            }
+        }
+
+        /* So mktime() can't handle this case.  We assume the
+           zone_offset for the date we are parsing is the same as
+           the zone offset on 00:00:00 2 Jan 1970 GMT. */
+        secs = 86400;
+        localTimeResult = MT_safe_localtime(&secs, &localTime);
+        PR_ASSERT(localTimeResult != NULL);
+        if (localTimeResult == NULL) {
+            return PR_FAILURE;
+        }
+        zone_offset = localTime.tm_min
+                      + 60 * localTime.tm_hour
+                      + 1440 * (localTime.tm_mday - 2);
+    }
+
+    result->tm_params.tp_gmt_offset = zone_offset * 60;
+    result->tm_params.tp_dst_offset = dst_offset * 60;
+
+    return PR_SUCCESS;
+}
+
+PR_IMPLEMENT(PRStatus)
+PR_ParseTimeString(
+    const char *string,
+    PRBool default_to_gmt,
+    PRTime *result)
+{
+    PRExplodedTime tm;
+    PRStatus rv;
+
+    rv = PR_ParseTimeStringToExplodedTime(string,
+                                          default_to_gmt,
+                                          &tm);
+    if (rv != PR_SUCCESS) {
+        return rv;
+    }
+
+    *result = PR_ImplodeTime(&tm);
+
+    return PR_SUCCESS;
+}
+
+/*
+ *******************************************************************
+ *******************************************************************
+ **
+ **    OLD COMPATIBILITY FUNCTIONS
+ **
+ *******************************************************************
+ *******************************************************************
+ */
+
+
+/*
+ *-----------------------------------------------------------------------
+ *
+ * PR_FormatTime --
+ *
+ *     Format a time value into a buffer. Same semantics as strftime().
+ *
+ *-----------------------------------------------------------------------
+ */
+
+PR_IMPLEMENT(PRUint32)
+PR_FormatTime(char *buf, int buflen, const char *fmt,
+              const PRExplodedTime *time)
+{
+    size_t rv;
+    struct tm a;
+    struct tm *ap;
+
+    if (time) {
+        ap = &a;
+        a.tm_sec = time->tm_sec;
+        a.tm_min = time->tm_min;
+        a.tm_hour = time->tm_hour;
+        a.tm_mday = time->tm_mday;
+        a.tm_mon = time->tm_month;
+        a.tm_wday = time->tm_wday;
+        a.tm_year = time->tm_year - 1900;
+        a.tm_yday = time->tm_yday;
+        a.tm_isdst = time->tm_params.tp_dst_offset ? 1 : 0;
+
+        /*
+         * On some platforms, for example SunOS 4, struct tm has two
+         * additional fields: tm_zone and tm_gmtoff.
+         */
+
+#if (__GLIBC__ >= 2) || defined(NETBSD) \
+        || defined(OPENBSD) || defined(FREEBSD) \
+        || defined(DARWIN) || defined(ANDROID)
+        a.tm_zone = NULL;
+        a.tm_gmtoff = time->tm_params.tp_gmt_offset +
+                      time->tm_params.tp_dst_offset;
+#endif
+    } else {
+        ap = NULL;
+    }
+
+    rv = strftime(buf, buflen, fmt, ap);
+    if (!rv && buf && buflen > 0) {
+        /*
+         * When strftime fails, the contents of buf are indeterminate.
+         * Some callers don't check the return value from this function,
+         * so store an empty string in buf in case they try to print it.
+         */
+        buf[0] = '\0';
+    }
+    return rv;
+}
+
+
+/*
+ * The following string arrays and macros are used by PR_FormatTimeUSEnglish().
+ */
+
+static const char* abbrevDays[] =
+{
+    "Sun","Mon","Tue","Wed","Thu","Fri","Sat"
+};
+
+static const char* days[] =
+{
+    "Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"
+};
+
+static const char* abbrevMonths[] =
+{
+    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+};
+
+static const char* months[] =
+{
+    "January", "February", "March", "April", "May", "June",
+    "July", "August", "September", "October", "November", "December"
+};
+
+
+/*
+ * Add a single character to the given buffer, incrementing the buffer pointer
+ * and decrementing the buffer size. Return 0 on error.
+ */
+#define ADDCHAR( buf, bufSize, ch )             \
+do                                              \
+{                                               \
+   if( bufSize < 1 )                            \
+   {                                            \
+      *(--buf) = '\0';                          \
+      return 0;                                 \
+   }                                            \
+   *buf++ = ch;                                 \
+   bufSize--;                                   \
+}                                               \
+while(0)
+
+
+/*
+ * Add a string to the given buffer, incrementing the buffer pointer
+ * and decrementing the buffer size appropriately.  Return 0 on error.
+ */
+#define ADDSTR( buf, bufSize, str )             \
+do                                              \
+{                                               \
+   PRUint32 strSize = strlen( str );              \
+   if( strSize > bufSize )                      \
+   {                                            \
+      if( bufSize==0 )                          \
+         *(--buf) = '\0';                       \
+      else                                      \
+         *buf = '\0';                           \
+      return 0;                                 \
+   }                                            \
+   memcpy(buf, str, strSize);                   \
+   buf += strSize;                              \
+   bufSize -= strSize;                          \
+}                                               \
+while(0)
+
+/* Needed by PR_FormatTimeUSEnglish() */
+static unsigned int  pr_WeekOfYear(const PRExplodedTime* time,
+                                   unsigned int firstDayOfWeek);
+
+
+/***********************************************************************************
+ *
+ * Description:
+ *  This is a dumbed down version of strftime that will format the date in US
+ *  English regardless of the setting of the global locale.  This functionality is
+ *  needed to write things like MIME headers which must always be in US English.
+ *
+ **********************************************************************************/
+
+PR_IMPLEMENT(PRUint32)
+PR_FormatTimeUSEnglish( char* buf, PRUint32 bufSize,
+                        const char* format, const PRExplodedTime* time )
+{
+    char*         bufPtr = buf;
+    const char*   fmtPtr;
+    char          tmpBuf[ 40 ];
+    const int     tmpBufSize = sizeof( tmpBuf );
+
+
+    for( fmtPtr=format; *fmtPtr != '\0'; fmtPtr++ )
+    {
+        if( *fmtPtr != '%' )
+        {
+            ADDCHAR( bufPtr, bufSize, *fmtPtr );
+        }
+        else
+        {
+            switch( *(++fmtPtr) )
+            {
+                case '%':
+                    /* escaped '%' character */
+                    ADDCHAR( bufPtr, bufSize, '%' );
+                    break;
+
+                case 'a':
+                    /* abbreviated weekday name */
+                    ADDSTR( bufPtr, bufSize, abbrevDays[ time->tm_wday ] );
+                    break;
+
+                case 'A':
+                    /* full weekday name */
+                    ADDSTR( bufPtr, bufSize, days[ time->tm_wday ] );
+                    break;
+
+                case 'b':
+                    /* abbreviated month name */
+                    ADDSTR( bufPtr, bufSize, abbrevMonths[ time->tm_month ] );
+                    break;
+
+                case 'B':
+                    /* full month name */
+                    ADDSTR(bufPtr, bufSize,  months[ time->tm_month ] );
+                    break;
+
+                case 'c':
+                    /* Date and time. */
+                    PR_FormatTimeUSEnglish( tmpBuf, tmpBufSize, "%a %b %d %H:%M:%S %Y", time );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'd':
+                    /* day of month ( 01 - 31 ) */
+                    PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_mday );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'H':
+                    /* hour ( 00 - 23 ) */
+                    PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_hour );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'I':
+                    /* hour ( 01 - 12 ) */
+                    PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",
+                                (time->tm_hour%12) ? time->tm_hour%12 : (PRInt32) 12 );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'j':
+                    /* day number of year ( 001 - 366 ) */
+                    PR_snprintf(tmpBuf,tmpBufSize,"%.3d",time->tm_yday + 1);
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'm':
+                    /* month number ( 01 - 12 ) */
+                    PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_month+1);
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'M':
+                    /* minute ( 00 - 59 ) */
+                    PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_min );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'p':
+                    /* locale's equivalent of either AM or PM */
+                    ADDSTR( bufPtr, bufSize, (time->tm_hour<12)?"AM":"PM" );
+                    break;
+
+                case 'S':
+                    /* seconds ( 00 - 61 ), allows for leap seconds */
+                    PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_sec );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'U':
+                    /* week number of year ( 00 - 53  ),  Sunday  is  the first day of week 1 */
+                    PR_snprintf(tmpBuf,tmpBufSize,"%.2d", pr_WeekOfYear( time, 0 ) );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'w':
+                    /* weekday number ( 0 - 6 ), Sunday = 0 */
+                    PR_snprintf(tmpBuf,tmpBufSize,"%d",time->tm_wday );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'W':
+                    /* Week number of year ( 00 - 53  ),  Monday  is  the first day of week 1 */
+                    PR_snprintf(tmpBuf,tmpBufSize,"%.2d", pr_WeekOfYear( time, 1 ) );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'x':
+                    /* Date representation */
+                    PR_FormatTimeUSEnglish( tmpBuf, tmpBufSize, "%m/%d/%y", time );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'X':
+                    /* Time representation. */
+                    PR_FormatTimeUSEnglish( tmpBuf, tmpBufSize, "%H:%M:%S", time );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'y':
+                    /* year within century ( 00 - 99 ) */
+                    PR_snprintf(tmpBuf,tmpBufSize,"%.2d",time->tm_year % 100 );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'Y':
+                    /* year as ccyy ( for example 1986 ) */
+                    PR_snprintf(tmpBuf,tmpBufSize,"%.4d",time->tm_year );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                case 'Z':
+                    /* Time zone name or no characters if  no  time  zone exists.
+                     * Since time zone name is supposed to be independant of locale, we
+                     * defer to PR_FormatTime() for this option.
+                     */
+                    PR_FormatTime( tmpBuf, tmpBufSize, "%Z", time );
+                    ADDSTR( bufPtr, bufSize, tmpBuf );
+                    break;
+
+                default:
+                    /* Unknown format.  Simply copy format into output buffer. */
+                    ADDCHAR( bufPtr, bufSize, '%' );
+                    ADDCHAR( bufPtr, bufSize, *fmtPtr );
+                    break;
+
+            }
+        }
+    }
+
+    ADDCHAR( bufPtr, bufSize, '\0' );
+    return (PRUint32)(bufPtr - buf - 1);
+}
+
+
+
+/***********************************************************************************
+ *
+ * Description:
+ *  Returns the week number of the year (0-53) for the given time.  firstDayOfWeek
+ *  is the day on which the week is considered to start (0=Sun, 1=Mon, ...).
+ *  Week 1 starts the first time firstDayOfWeek occurs in the year.  In other words,
+ *  a partial week at the start of the year is considered week 0.
+ *
+ **********************************************************************************/
+
+static unsigned int
+pr_WeekOfYear(const PRExplodedTime* time, unsigned int firstDayOfWeek)
+{
+    int dayOfWeek;
+    int dayOfYear;
+
+    /* Get the day of the year for the given time then adjust it to represent the
+     * first day of the week containing the given time.
+     */
+    dayOfWeek = time->tm_wday - firstDayOfWeek;
+    if (dayOfWeek < 0) {
+        dayOfWeek += 7;
+    }
+
+    dayOfYear = time->tm_yday - dayOfWeek;
+
+    if( dayOfYear <= 0 )
+    {
+        /* If dayOfYear is <= 0, it is in the first partial week of the year. */
+        return 0;
+    }
+
+    /* Count the number of full weeks ( dayOfYear / 7 ) then add a week if there
+     * are any days left over ( dayOfYear % 7 ).  Because we are only counting to
+     * the first day of the week containing the given time, rather than to the
+     * actual day representing the given time, any days in week 0 will be "absorbed"
+     * as extra days in the given week.
+     */
+    return (dayOfYear / 7) + ( (dayOfYear % 7) == 0 ? 0 : 1 );
+
+}
+
diff --git a/nsprpub/pr/src/misc/prtpool.c b/nsprpub/pr/src/misc/prtpool.c
new file mode 100644
index 0000000000..69f588ef6e
--- /dev/null
+++ b/nsprpub/pr/src/misc/prtpool.c
@@ -0,0 +1,1236 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nspr.h"
+
+/*
+ * Thread pools
+ *  Thread pools create and manage threads to provide support for
+ *  scheduling jobs onto one or more threads.
+ *
+ */
+#ifdef OPT_WINNT
+#include <windows.h>
+#endif
+
+/*
+ * worker thread
+ */
+typedef struct wthread {
+    PRCList     links;
+    PRThread    *thread;
+} wthread;
+
+/*
+ * queue of timer jobs
+ */
+typedef struct timer_jobq {
+    PRCList     list;
+    PRLock      *lock;
+    PRCondVar   *cv;
+    PRInt32     cnt;
+    PRCList     wthreads;
+} timer_jobq;
+
+/*
+ * queue of jobs
+ */
+typedef struct tp_jobq {
+    PRCList     list;
+    PRInt32     cnt;
+    PRLock      *lock;
+    PRCondVar   *cv;
+    PRCList     wthreads;
+#ifdef OPT_WINNT
+    HANDLE      nt_completion_port;
+#endif
+} tp_jobq;
+
+/*
+ * queue of IO jobs
+ */
+typedef struct io_jobq {
+    PRCList     list;
+    PRPollDesc  *pollfds;
+    PRInt32     npollfds;
+    PRJob       **polljobs;
+    PRLock      *lock;
+    PRInt32     cnt;
+    PRFileDesc  *notify_fd;
+    PRCList     wthreads;
+} io_jobq;
+
+/*
+ * Threadpool
+ */
+struct PRThreadPool {
+    PRInt32     init_threads;
+    PRInt32     max_threads;
+    PRInt32     current_threads;
+    PRInt32     idle_threads;
+    PRUint32    stacksize;
+    tp_jobq     jobq;
+    io_jobq     ioq;
+    timer_jobq  timerq;
+    PRLock      *join_lock;     /* used with jobp->join_cv */
+    PRCondVar   *shutdown_cv;
+    PRBool      shutdown;
+};
+
+typedef enum io_op_type
+{ JOB_IO_READ, JOB_IO_WRITE, JOB_IO_CONNECT, JOB_IO_ACCEPT } io_op_type;
+
+#ifdef OPT_WINNT
+typedef struct NT_notifier {
+    OVERLAPPED overlapped;      /* must be first */
+    PRJob   *jobp;
+} NT_notifier;
+#endif
+
+struct PRJob {
+    PRCList         links;      /*  for linking jobs */
+    PRBool          on_ioq;     /* job on ioq */
+    PRBool          on_timerq;  /* job on timerq */
+    PRJobFn         job_func;
+    void            *job_arg;
+    PRCondVar       *join_cv;
+    PRBool          join_wait;  /* == PR_TRUE, when waiting to join */
+    PRCondVar       *cancel_cv; /* for cancelling IO jobs */
+    PRBool          cancel_io;  /* for cancelling IO jobs */
+    PRThreadPool    *tpool;     /* back pointer to thread pool */
+    PRJobIoDesc     *iod;
+    io_op_type      io_op;
+    PRInt16         io_poll_flags;
+    PRNetAddr       *netaddr;
+    PRIntervalTime  timeout;    /* relative value */
+    PRIntervalTime  absolute;
+#ifdef OPT_WINNT
+    NT_notifier     nt_notifier;
+#endif
+};
+
+#define JOB_LINKS_PTR(_qp) \
+    ((PRJob *) ((char *) (_qp) - offsetof(PRJob, links)))
+
+#define WTHREAD_LINKS_PTR(_qp) \
+    ((wthread *) ((char *) (_qp) - offsetof(wthread, links)))
+
+#define JOINABLE_JOB(_jobp) (NULL != (_jobp)->join_cv)
+
+#define JOIN_NOTIFY(_jobp)                              \
+                PR_BEGIN_MACRO                          \
+                PR_Lock(_jobp->tpool->join_lock);       \
+                _jobp->join_wait = PR_FALSE;            \
+                PR_NotifyCondVar(_jobp->join_cv);       \
+                PR_Unlock(_jobp->tpool->join_lock);     \
+                PR_END_MACRO
+
+#define CANCEL_IO_JOB(jobp)                             \
+                PR_BEGIN_MACRO                          \
+                jobp->cancel_io = PR_FALSE;             \
+                jobp->on_ioq = PR_FALSE;                \
+                PR_REMOVE_AND_INIT_LINK(&jobp->links);  \
+                tp->ioq.cnt--;                          \
+                PR_NotifyCondVar(jobp->cancel_cv);      \
+                PR_END_MACRO
+
+static void delete_job(PRJob *jobp);
+static PRThreadPool * alloc_threadpool(void);
+static PRJob * alloc_job(PRBool joinable, PRThreadPool *tp);
+static void notify_ioq(PRThreadPool *tp);
+static void notify_timerq(PRThreadPool *tp);
+
+/*
+ * locks are acquired in the following order
+ *
+ *  tp->ioq.lock,tp->timerq.lock
+ *          |
+ *          V
+ *      tp->jobq->lock
+ */
+
+/*
+ * worker thread function
+ */
+static void wstart(void *arg)
+{
+    PRThreadPool *tp = (PRThreadPool *) arg;
+    PRCList *head;
+
+    /*
+     * execute jobs until shutdown
+     */
+    while (!tp->shutdown) {
+        PRJob *jobp;
+#ifdef OPT_WINNT
+        BOOL rv;
+        DWORD unused, shutdown;
+        LPOVERLAPPED olp;
+
+        PR_Lock(tp->jobq.lock);
+        tp->idle_threads++;
+        PR_Unlock(tp->jobq.lock);
+        rv = GetQueuedCompletionStatus(tp->jobq.nt_completion_port,
+                                       &unused, &shutdown, &olp, INFINITE);
+
+        PR_ASSERT(rv);
+        if (shutdown) {
+            break;
+        }
+        jobp = ((NT_notifier *) olp)->jobp;
+        PR_Lock(tp->jobq.lock);
+        tp->idle_threads--;
+        tp->jobq.cnt--;
+        PR_Unlock(tp->jobq.lock);
+#else
+
+        PR_Lock(tp->jobq.lock);
+        while (PR_CLIST_IS_EMPTY(&tp->jobq.list) && (!tp->shutdown)) {
+            tp->idle_threads++;
+            PR_WaitCondVar(tp->jobq.cv, PR_INTERVAL_NO_TIMEOUT);
+            tp->idle_threads--;
+        }
+        if (tp->shutdown) {
+            PR_Unlock(tp->jobq.lock);
+            break;
+        }
+        head = PR_LIST_HEAD(&tp->jobq.list);
+        /*
+         * remove job from queue
+         */
+        PR_REMOVE_AND_INIT_LINK(head);
+        tp->jobq.cnt--;
+        jobp = JOB_LINKS_PTR(head);
+        PR_Unlock(tp->jobq.lock);
+#endif
+
+        jobp->job_func(jobp->job_arg);
+        if (!JOINABLE_JOB(jobp)) {
+            delete_job(jobp);
+        } else {
+            JOIN_NOTIFY(jobp);
+        }
+    }
+    PR_Lock(tp->jobq.lock);
+    tp->current_threads--;
+    PR_Unlock(tp->jobq.lock);
+}
+
+/*
+ * add a job to the work queue
+ */
+static void
+add_to_jobq(PRThreadPool *tp, PRJob *jobp)
+{
+    /*
+     * add to jobq
+     */
+#ifdef OPT_WINNT
+    PR_Lock(tp->jobq.lock);
+    tp->jobq.cnt++;
+    PR_Unlock(tp->jobq.lock);
+    /*
+     * notify worker thread(s)
+     */
+    PostQueuedCompletionStatus(tp->jobq.nt_completion_port, 0,
+                               FALSE, &jobp->nt_notifier.overlapped);
+#else
+    PR_Lock(tp->jobq.lock);
+    PR_APPEND_LINK(&jobp->links,&tp->jobq.list);
+    tp->jobq.cnt++;
+    if ((tp->idle_threads < tp->jobq.cnt) &&
+        (tp->current_threads < tp->max_threads)) {
+        wthread *wthrp;
+        /*
+         * increment thread count and unlock the jobq lock
+         */
+        tp->current_threads++;
+        PR_Unlock(tp->jobq.lock);
+        /* create new worker thread */
+        wthrp = PR_NEWZAP(wthread);
+        if (wthrp) {
+            wthrp->thread = PR_CreateThread(PR_USER_THREAD, wstart,
+                                            tp, PR_PRIORITY_NORMAL,
+                                            PR_GLOBAL_THREAD,PR_JOINABLE_THREAD,tp->stacksize);
+            if (NULL == wthrp->thread) {
+                PR_DELETE(wthrp);  /* this sets wthrp to NULL */
+            }
+        }
+        PR_Lock(tp->jobq.lock);
+        if (NULL == wthrp) {
+            tp->current_threads--;
+        } else {
+            PR_APPEND_LINK(&wthrp->links, &tp->jobq.wthreads);
+        }
+    }
+    /*
+     * wakeup a worker thread
+     */
+    PR_NotifyCondVar(tp->jobq.cv);
+    PR_Unlock(tp->jobq.lock);
+#endif
+}
+
+/*
+ * io worker thread function
+ */
+static void io_wstart(void *arg)
+{
+    PRThreadPool *tp = (PRThreadPool *) arg;
+    int pollfd_cnt, pollfds_used;
+    int rv;
+    PRCList *qp, *nextqp;
+    PRPollDesc *pollfds = NULL;
+    PRJob **polljobs = NULL;
+    int poll_timeout;
+    PRIntervalTime now;
+
+    /*
+     * scan io_jobq
+     * construct poll list
+     * call PR_Poll
+     * for all fds, for which poll returns true, move the job to
+     * jobq and wakeup worker thread.
+     */
+    while (!tp->shutdown) {
+        PRJob *jobp;
+
+        pollfd_cnt = tp->ioq.cnt + 10;
+        if (pollfd_cnt > tp->ioq.npollfds) {
+
+            /*
+             * re-allocate pollfd array if the current one is not large
+             * enough
+             */
+            if (NULL != tp->ioq.pollfds) {
+                PR_Free(tp->ioq.pollfds);
+            }
+            tp->ioq.pollfds = (PRPollDesc *) PR_Malloc(pollfd_cnt *
+                              (sizeof(PRPollDesc) + sizeof(PRJob *)));
+            PR_ASSERT(NULL != tp->ioq.pollfds);
+            /*
+             * array of pollfds
+             */
+            pollfds = tp->ioq.pollfds;
+            tp->ioq.polljobs = (PRJob **) (&tp->ioq.pollfds[pollfd_cnt]);
+            /*
+             * parallel array of jobs
+             */
+            polljobs = tp->ioq.polljobs;
+            tp->ioq.npollfds = pollfd_cnt;
+        }
+
+        pollfds_used = 0;
+        /*
+         * add the notify fd; used for unblocking io thread(s)
+         */
+        pollfds[pollfds_used].fd = tp->ioq.notify_fd;
+        pollfds[pollfds_used].in_flags = PR_POLL_READ;
+        pollfds[pollfds_used].out_flags = 0;
+        polljobs[pollfds_used] = NULL;
+        pollfds_used++;
+        /*
+         * fill in the pollfd array
+         */
+        PR_Lock(tp->ioq.lock);
+        for (qp = tp->ioq.list.next; qp != &tp->ioq.list; qp = nextqp) {
+            nextqp = qp->next;
+            jobp = JOB_LINKS_PTR(qp);
+            if (jobp->cancel_io) {
+                CANCEL_IO_JOB(jobp);
+                continue;
+            }
+            if (pollfds_used == (pollfd_cnt)) {
+                break;
+            }
+            pollfds[pollfds_used].fd = jobp->iod->socket;
+            pollfds[pollfds_used].in_flags = jobp->io_poll_flags;
+            pollfds[pollfds_used].out_flags = 0;
+            polljobs[pollfds_used] = jobp;
+
+            pollfds_used++;
+        }
+        if (!PR_CLIST_IS_EMPTY(&tp->ioq.list)) {
+            qp = tp->ioq.list.next;
+            jobp = JOB_LINKS_PTR(qp);
+            if (PR_INTERVAL_NO_TIMEOUT == jobp->timeout) {
+                poll_timeout = PR_INTERVAL_NO_TIMEOUT;
+            }
+            else if (PR_INTERVAL_NO_WAIT == jobp->timeout) {
+                poll_timeout = PR_INTERVAL_NO_WAIT;
+            }
+            else {
+                poll_timeout = jobp->absolute - PR_IntervalNow();
+                if (poll_timeout <= 0) { /* already timed out */
+                    poll_timeout = PR_INTERVAL_NO_WAIT;
+                }
+            }
+        } else {
+            poll_timeout = PR_INTERVAL_NO_TIMEOUT;
+        }
+        PR_Unlock(tp->ioq.lock);
+
+        /*
+         * XXXX
+         * should retry if more jobs have been added to the queue?
+         *
+         */
+        PR_ASSERT(pollfds_used <= pollfd_cnt);
+        rv = PR_Poll(tp->ioq.pollfds, pollfds_used, poll_timeout);
+
+        if (tp->shutdown) {
+            break;
+        }
+
+        if (rv > 0) {
+            /*
+             * at least one io event is set
+             */
+            PRStatus rval_status;
+            PRInt32 index;
+
+            PR_ASSERT(pollfds[0].fd == tp->ioq.notify_fd);
+            /*
+             * reset the pollable event, if notified
+             */
+            if (pollfds[0].out_flags & PR_POLL_READ) {
+                rval_status = PR_WaitForPollableEvent(tp->ioq.notify_fd);
+                PR_ASSERT(PR_SUCCESS == rval_status);
+            }
+
+            for(index = 1; index < (pollfds_used); index++) {
+                PRInt16 events = pollfds[index].in_flags;
+                PRInt16 revents = pollfds[index].out_flags;
+                jobp = polljobs[index];
+
+                if ((revents & PR_POLL_NVAL) ||  /* busted in all cases */
+                    (revents & PR_POLL_ERR) ||
+                    ((events & PR_POLL_WRITE) &&
+                     (revents & PR_POLL_HUP))) { /* write op & hup */
+                    PR_Lock(tp->ioq.lock);
+                    if (jobp->cancel_io) {
+                        CANCEL_IO_JOB(jobp);
+                        PR_Unlock(tp->ioq.lock);
+                        continue;
+                    }
+                    PR_REMOVE_AND_INIT_LINK(&jobp->links);
+                    tp->ioq.cnt--;
+                    jobp->on_ioq = PR_FALSE;
+                    PR_Unlock(tp->ioq.lock);
+
+                    /* set error */
+                    if (PR_POLL_NVAL & revents) {
+                        jobp->iod->error = PR_BAD_DESCRIPTOR_ERROR;
+                    }
+                    else if (PR_POLL_HUP & revents) {
+                        jobp->iod->error = PR_CONNECT_RESET_ERROR;
+                    }
+                    else {
+                        jobp->iod->error = PR_IO_ERROR;
+                    }
+
+                    /*
+                     * add to jobq
+                     */
+                    add_to_jobq(tp, jobp);
+                } else if (revents) {
+                    /*
+                     * add to jobq
+                     */
+                    PR_Lock(tp->ioq.lock);
+                    if (jobp->cancel_io) {
+                        CANCEL_IO_JOB(jobp);
+                        PR_Unlock(tp->ioq.lock);
+                        continue;
+                    }
+                    PR_REMOVE_AND_INIT_LINK(&jobp->links);
+                    tp->ioq.cnt--;
+                    jobp->on_ioq = PR_FALSE;
+                    PR_Unlock(tp->ioq.lock);
+
+                    if (jobp->io_op == JOB_IO_CONNECT) {
+                        if (PR_GetConnectStatus(&pollfds[index]) == PR_SUCCESS) {
+                            jobp->iod->error = 0;
+                        }
+                        else {
+                            jobp->iod->error = PR_GetError();
+                        }
+                    } else {
+                        jobp->iod->error = 0;
+                    }
+
+                    add_to_jobq(tp, jobp);
+                }
+            }
+        }
+        /*
+         * timeout processing
+         */
+        now = PR_IntervalNow();
+        PR_Lock(tp->ioq.lock);
+        for (qp = tp->ioq.list.next; qp != &tp->ioq.list; qp = nextqp) {
+            nextqp = qp->next;
+            jobp = JOB_LINKS_PTR(qp);
+            if (jobp->cancel_io) {
+                CANCEL_IO_JOB(jobp);
+                continue;
+            }
+            if (PR_INTERVAL_NO_TIMEOUT == jobp->timeout) {
+                break;
+            }
+            if ((PR_INTERVAL_NO_WAIT != jobp->timeout) &&
+                ((PRInt32)(jobp->absolute - now) > 0)) {
+                break;
+            }
+            PR_REMOVE_AND_INIT_LINK(&jobp->links);
+            tp->ioq.cnt--;
+            jobp->on_ioq = PR_FALSE;
+            jobp->iod->error = PR_IO_TIMEOUT_ERROR;
+            add_to_jobq(tp, jobp);
+        }
+        PR_Unlock(tp->ioq.lock);
+    }
+}
+
+/*
+ * timer worker thread function
+ */
+static void timer_wstart(void *arg)
+{
+    PRThreadPool *tp = (PRThreadPool *) arg;
+    PRCList *qp;
+    PRIntervalTime timeout;
+    PRIntervalTime now;
+
+    /*
+     * call PR_WaitCondVar with minimum value of all timeouts
+     */
+    while (!tp->shutdown) {
+        PRJob *jobp;
+
+        PR_Lock(tp->timerq.lock);
+        if (PR_CLIST_IS_EMPTY(&tp->timerq.list)) {
+            timeout = PR_INTERVAL_NO_TIMEOUT;
+        } else {
+            PRCList *qp;
+
+            qp = tp->timerq.list.next;
+            jobp = JOB_LINKS_PTR(qp);
+
+            timeout = jobp->absolute - PR_IntervalNow();
+            if (timeout <= 0) {
+                timeout = PR_INTERVAL_NO_WAIT;    /* already timed out */
+            }
+        }
+        if (PR_INTERVAL_NO_WAIT != timeout) {
+            PR_WaitCondVar(tp->timerq.cv, timeout);
+        }
+        if (tp->shutdown) {
+            PR_Unlock(tp->timerq.lock);
+            break;
+        }
+        /*
+         * move expired-timer jobs to jobq
+         */
+        now = PR_IntervalNow();
+        while (!PR_CLIST_IS_EMPTY(&tp->timerq.list)) {
+            qp = tp->timerq.list.next;
+            jobp = JOB_LINKS_PTR(qp);
+
+            if ((PRInt32)(jobp->absolute - now) > 0) {
+                break;
+            }
+            /*
+             * job timed out
+             */
+            PR_REMOVE_AND_INIT_LINK(&jobp->links);
+            tp->timerq.cnt--;
+            jobp->on_timerq = PR_FALSE;
+            add_to_jobq(tp, jobp);
+        }
+        PR_Unlock(tp->timerq.lock);
+    }
+}
+
+static void
+delete_threadpool(PRThreadPool *tp)
+{
+    if (NULL != tp) {
+        if (NULL != tp->shutdown_cv) {
+            PR_DestroyCondVar(tp->shutdown_cv);
+        }
+        if (NULL != tp->jobq.cv) {
+            PR_DestroyCondVar(tp->jobq.cv);
+        }
+        if (NULL != tp->jobq.lock) {
+            PR_DestroyLock(tp->jobq.lock);
+        }
+        if (NULL != tp->join_lock) {
+            PR_DestroyLock(tp->join_lock);
+        }
+#ifdef OPT_WINNT
+        if (NULL != tp->jobq.nt_completion_port) {
+            CloseHandle(tp->jobq.nt_completion_port);
+        }
+#endif
+        /* Timer queue */
+        if (NULL != tp->timerq.cv) {
+            PR_DestroyCondVar(tp->timerq.cv);
+        }
+        if (NULL != tp->timerq.lock) {
+            PR_DestroyLock(tp->timerq.lock);
+        }
+
+        if (NULL != tp->ioq.lock) {
+            PR_DestroyLock(tp->ioq.lock);
+        }
+        if (NULL != tp->ioq.pollfds) {
+            PR_Free(tp->ioq.pollfds);
+        }
+        if (NULL != tp->ioq.notify_fd) {
+            PR_DestroyPollableEvent(tp->ioq.notify_fd);
+        }
+        PR_Free(tp);
+    }
+    return;
+}
+
+static PRThreadPool *
+alloc_threadpool(void)
+{
+    PRThreadPool *tp;
+
+    tp = (PRThreadPool *) PR_CALLOC(sizeof(*tp));
+    if (NULL == tp) {
+        goto failed;
+    }
+    tp->jobq.lock = PR_NewLock();
+    if (NULL == tp->jobq.lock) {
+        goto failed;
+    }
+    tp->jobq.cv = PR_NewCondVar(tp->jobq.lock);
+    if (NULL == tp->jobq.cv) {
+        goto failed;
+    }
+    tp->join_lock = PR_NewLock();
+    if (NULL == tp->join_lock) {
+        goto failed;
+    }
+#ifdef OPT_WINNT
+    tp->jobq.nt_completion_port = CreateIoCompletionPort(INVALID_HANDLE_VALUE,
+                                  NULL, 0, 0);
+    if (NULL == tp->jobq.nt_completion_port) {
+        goto failed;
+    }
+#endif
+
+    tp->ioq.lock = PR_NewLock();
+    if (NULL == tp->ioq.lock) {
+        goto failed;
+    }
+
+    /* Timer queue */
+
+    tp->timerq.lock = PR_NewLock();
+    if (NULL == tp->timerq.lock) {
+        goto failed;
+    }
+    tp->timerq.cv = PR_NewCondVar(tp->timerq.lock);
+    if (NULL == tp->timerq.cv) {
+        goto failed;
+    }
+
+    tp->shutdown_cv = PR_NewCondVar(tp->jobq.lock);
+    if (NULL == tp->shutdown_cv) {
+        goto failed;
+    }
+    tp->ioq.notify_fd = PR_NewPollableEvent();
+    if (NULL == tp->ioq.notify_fd) {
+        goto failed;
+    }
+    return tp;
+failed:
+    delete_threadpool(tp);
+    PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+    return NULL;
+}
+
+/* Create thread pool */
+PR_IMPLEMENT(PRThreadPool *)
+PR_CreateThreadPool(PRInt32 initial_threads, PRInt32 max_threads,
+                    PRUint32 stacksize)
+{
+    PRThreadPool *tp;
+    PRThread *thr;
+    int i;
+    wthread *wthrp;
+
+    tp = alloc_threadpool();
+    if (NULL == tp) {
+        return NULL;
+    }
+
+    tp->init_threads = initial_threads;
+    tp->max_threads = max_threads;
+    tp->stacksize = stacksize;
+    PR_INIT_CLIST(&tp->jobq.list);
+    PR_INIT_CLIST(&tp->ioq.list);
+    PR_INIT_CLIST(&tp->timerq.list);
+    PR_INIT_CLIST(&tp->jobq.wthreads);
+    PR_INIT_CLIST(&tp->ioq.wthreads);
+    PR_INIT_CLIST(&tp->timerq.wthreads);
+    tp->shutdown = PR_FALSE;
+
+    PR_Lock(tp->jobq.lock);
+    for(i=0; i < initial_threads; ++i) {
+
+        thr = PR_CreateThread(PR_USER_THREAD, wstart,
+                              tp, PR_PRIORITY_NORMAL,
+                              PR_GLOBAL_THREAD, PR_JOINABLE_THREAD,stacksize);
+        PR_ASSERT(thr);
+        wthrp = PR_NEWZAP(wthread);
+        PR_ASSERT(wthrp);
+        wthrp->thread = thr;
+        PR_APPEND_LINK(&wthrp->links, &tp->jobq.wthreads);
+    }
+    tp->current_threads = initial_threads;
+
+    thr = PR_CreateThread(PR_USER_THREAD, io_wstart,
+                          tp, PR_PRIORITY_NORMAL,
+                          PR_GLOBAL_THREAD,PR_JOINABLE_THREAD,stacksize);
+    PR_ASSERT(thr);
+    wthrp = PR_NEWZAP(wthread);
+    PR_ASSERT(wthrp);
+    wthrp->thread = thr;
+    PR_APPEND_LINK(&wthrp->links, &tp->ioq.wthreads);
+
+    thr = PR_CreateThread(PR_USER_THREAD, timer_wstart,
+                          tp, PR_PRIORITY_NORMAL,
+                          PR_GLOBAL_THREAD,PR_JOINABLE_THREAD,stacksize);
+    PR_ASSERT(thr);
+    wthrp = PR_NEWZAP(wthread);
+    PR_ASSERT(wthrp);
+    wthrp->thread = thr;
+    PR_APPEND_LINK(&wthrp->links, &tp->timerq.wthreads);
+
+    PR_Unlock(tp->jobq.lock);
+    return tp;
+}
+
+static void
+delete_job(PRJob *jobp)
+{
+    if (NULL != jobp) {
+        if (NULL != jobp->join_cv) {
+            PR_DestroyCondVar(jobp->join_cv);
+            jobp->join_cv = NULL;
+        }
+        if (NULL != jobp->cancel_cv) {
+            PR_DestroyCondVar(jobp->cancel_cv);
+            jobp->cancel_cv = NULL;
+        }
+        PR_DELETE(jobp);
+    }
+}
+
+static PRJob *
+alloc_job(PRBool joinable, PRThreadPool *tp)
+{
+    PRJob *jobp;
+
+    jobp = PR_NEWZAP(PRJob);
+    if (NULL == jobp) {
+        goto failed;
+    }
+    if (joinable) {
+        jobp->join_cv = PR_NewCondVar(tp->join_lock);
+        jobp->join_wait = PR_TRUE;
+        if (NULL == jobp->join_cv) {
+            goto failed;
+        }
+    } else {
+        jobp->join_cv = NULL;
+    }
+#ifdef OPT_WINNT
+    jobp->nt_notifier.jobp = jobp;
+#endif
+    return jobp;
+failed:
+    delete_job(jobp);
+    PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+    return NULL;
+}
+
+/* queue a job */
+PR_IMPLEMENT(PRJob *)
+PR_QueueJob(PRThreadPool *tpool, PRJobFn fn, void *arg, PRBool joinable)
+{
+    PRJob *jobp;
+
+    jobp = alloc_job(joinable, tpool);
+    if (NULL == jobp) {
+        return NULL;
+    }
+
+    jobp->job_func = fn;
+    jobp->job_arg = arg;
+    jobp->tpool = tpool;
+
+    add_to_jobq(tpool, jobp);
+    return jobp;
+}
+
+/* queue a job, when a socket is readable or writeable */
+static PRJob *
+queue_io_job(PRThreadPool *tpool, PRJobIoDesc *iod, PRJobFn fn, void * arg,
+             PRBool joinable, io_op_type op)
+{
+    PRJob *jobp;
+    PRIntervalTime now;
+
+    jobp = alloc_job(joinable, tpool);
+    if (NULL == jobp) {
+        return NULL;
+    }
+
+    /*
+     * Add a new job to io_jobq
+     * wakeup io worker thread
+     */
+
+    jobp->job_func = fn;
+    jobp->job_arg = arg;
+    jobp->tpool = tpool;
+    jobp->iod = iod;
+    if (JOB_IO_READ == op) {
+        jobp->io_op = JOB_IO_READ;
+        jobp->io_poll_flags = PR_POLL_READ;
+    } else if (JOB_IO_WRITE == op) {
+        jobp->io_op = JOB_IO_WRITE;
+        jobp->io_poll_flags = PR_POLL_WRITE;
+    } else if (JOB_IO_ACCEPT == op) {
+        jobp->io_op = JOB_IO_ACCEPT;
+        jobp->io_poll_flags = PR_POLL_READ;
+    } else if (JOB_IO_CONNECT == op) {
+        jobp->io_op = JOB_IO_CONNECT;
+        jobp->io_poll_flags = PR_POLL_WRITE|PR_POLL_EXCEPT;
+    } else {
+        delete_job(jobp);
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return NULL;
+    }
+
+    jobp->timeout = iod->timeout;
+    if ((PR_INTERVAL_NO_TIMEOUT == iod->timeout) ||
+        (PR_INTERVAL_NO_WAIT == iod->timeout)) {
+        jobp->absolute = iod->timeout;
+    } else {
+        now = PR_IntervalNow();
+        jobp->absolute = now + iod->timeout;
+    }
+
+
+    PR_Lock(tpool->ioq.lock);
+
+    if (PR_CLIST_IS_EMPTY(&tpool->ioq.list) ||
+        (PR_INTERVAL_NO_TIMEOUT == iod->timeout)) {
+        PR_APPEND_LINK(&jobp->links,&tpool->ioq.list);
+    } else if (PR_INTERVAL_NO_WAIT == iod->timeout) {
+        PR_INSERT_LINK(&jobp->links,&tpool->ioq.list);
+    } else {
+        PRCList *qp;
+        PRJob *tmp_jobp;
+        /*
+         * insert into the timeout-sorted ioq
+         */
+        for (qp = tpool->ioq.list.prev; qp != &tpool->ioq.list;
+             qp = qp->prev) {
+            tmp_jobp = JOB_LINKS_PTR(qp);
+            if ((PRInt32)(jobp->absolute - tmp_jobp->absolute) >= 0) {
+                break;
+            }
+        }
+        PR_INSERT_AFTER(&jobp->links,qp);
+    }
+
+    jobp->on_ioq = PR_TRUE;
+    tpool->ioq.cnt++;
+    /*
+     * notify io worker thread(s)
+     */
+    PR_Unlock(tpool->ioq.lock);
+    notify_ioq(tpool);
+    return jobp;
+}
+
+/* queue a job, when a socket is readable */
+PR_IMPLEMENT(PRJob *)
+PR_QueueJob_Read(PRThreadPool *tpool, PRJobIoDesc *iod, PRJobFn fn, void * arg,
+                 PRBool joinable)
+{
+    return (queue_io_job(tpool, iod, fn, arg, joinable, JOB_IO_READ));
+}
+
+/* queue a job, when a socket is writeable */
+PR_IMPLEMENT(PRJob *)
+PR_QueueJob_Write(PRThreadPool *tpool, PRJobIoDesc *iod, PRJobFn fn,void * arg,
+                  PRBool joinable)
+{
+    return (queue_io_job(tpool, iod, fn, arg, joinable, JOB_IO_WRITE));
+}
+
+
+/* queue a job, when a socket has a pending connection */
+PR_IMPLEMENT(PRJob *)
+PR_QueueJob_Accept(PRThreadPool *tpool, PRJobIoDesc *iod, PRJobFn fn,
+                   void * arg, PRBool joinable)
+{
+    return (queue_io_job(tpool, iod, fn, arg, joinable, JOB_IO_ACCEPT));
+}
+
+/* queue a job, when a socket can be connected */
+PR_IMPLEMENT(PRJob *)
+PR_QueueJob_Connect(PRThreadPool *tpool, PRJobIoDesc *iod,
+                    const PRNetAddr *addr, PRJobFn fn, void * arg, PRBool joinable)
+{
+    PRStatus rv;
+    PRErrorCode err;
+
+    rv = PR_Connect(iod->socket, addr, PR_INTERVAL_NO_WAIT);
+    if ((rv == PR_FAILURE) && ((err = PR_GetError()) == PR_IN_PROGRESS_ERROR)) {
+        /* connection pending */
+        return(queue_io_job(tpool, iod, fn, arg, joinable, JOB_IO_CONNECT));
+    }
+    /*
+     * connection succeeded or failed; add to jobq right away
+     */
+    if (rv == PR_FAILURE) {
+        iod->error = err;
+    }
+    else {
+        iod->error = 0;
+    }
+    return(PR_QueueJob(tpool, fn, arg, joinable));
+
+}
+
+/* queue a job, when a timer expires */
+PR_IMPLEMENT(PRJob *)
+PR_QueueJob_Timer(PRThreadPool *tpool, PRIntervalTime timeout,
+                  PRJobFn fn, void * arg, PRBool joinable)
+{
+    PRIntervalTime now;
+    PRJob *jobp;
+
+    if (PR_INTERVAL_NO_TIMEOUT == timeout) {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return NULL;
+    }
+    if (PR_INTERVAL_NO_WAIT == timeout) {
+        /*
+         * no waiting; add to jobq right away
+         */
+        return(PR_QueueJob(tpool, fn, arg, joinable));
+    }
+    jobp = alloc_job(joinable, tpool);
+    if (NULL == jobp) {
+        return NULL;
+    }
+
+    /*
+     * Add a new job to timer_jobq
+     * wakeup timer worker thread
+     */
+
+    jobp->job_func = fn;
+    jobp->job_arg = arg;
+    jobp->tpool = tpool;
+    jobp->timeout = timeout;
+
+    now = PR_IntervalNow();
+    jobp->absolute = now + timeout;
+
+
+    PR_Lock(tpool->timerq.lock);
+    jobp->on_timerq = PR_TRUE;
+    if (PR_CLIST_IS_EMPTY(&tpool->timerq.list)) {
+        PR_APPEND_LINK(&jobp->links,&tpool->timerq.list);
+    }
+    else {
+        PRCList *qp;
+        PRJob *tmp_jobp;
+        /*
+         * insert into the sorted timer jobq
+         */
+        for (qp = tpool->timerq.list.prev; qp != &tpool->timerq.list;
+             qp = qp->prev) {
+            tmp_jobp = JOB_LINKS_PTR(qp);
+            if ((PRInt32)(jobp->absolute - tmp_jobp->absolute) >= 0) {
+                break;
+            }
+        }
+        PR_INSERT_AFTER(&jobp->links,qp);
+    }
+    tpool->timerq.cnt++;
+    /*
+     * notify timer worker thread(s)
+     */
+    notify_timerq(tpool);
+    PR_Unlock(tpool->timerq.lock);
+    return jobp;
+}
+
+static void
+notify_timerq(PRThreadPool *tp)
+{
+    /*
+     * wakeup the timer thread(s)
+     */
+    PR_NotifyCondVar(tp->timerq.cv);
+}
+
+static void
+notify_ioq(PRThreadPool *tp)
+{
+    PRStatus rval_status;
+
+    /*
+     * wakeup the io thread(s)
+     */
+    rval_status = PR_SetPollableEvent(tp->ioq.notify_fd);
+    PR_ASSERT(PR_SUCCESS == rval_status);
+}
+
+/*
+ * cancel a job
+ *
+ *  XXXX: is this needed? likely to be removed
+ */
+PR_IMPLEMENT(PRStatus)
+PR_CancelJob(PRJob *jobp) {
+
+    PRStatus rval = PR_FAILURE;
+    PRThreadPool *tp;
+
+    if (jobp->on_timerq) {
+        /*
+         * now, check again while holding the timerq lock
+         */
+        tp = jobp->tpool;
+        PR_Lock(tp->timerq.lock);
+        if (jobp->on_timerq) {
+            jobp->on_timerq = PR_FALSE;
+            PR_REMOVE_AND_INIT_LINK(&jobp->links);
+            tp->timerq.cnt--;
+            PR_Unlock(tp->timerq.lock);
+            if (!JOINABLE_JOB(jobp)) {
+                delete_job(jobp);
+            } else {
+                JOIN_NOTIFY(jobp);
+            }
+            rval = PR_SUCCESS;
+        } else {
+            PR_Unlock(tp->timerq.lock);
+        }
+    } else if (jobp->on_ioq) {
+        /*
+         * now, check again while holding the ioq lock
+         */
+        tp = jobp->tpool;
+        PR_Lock(tp->ioq.lock);
+        if (jobp->on_ioq) {
+            jobp->cancel_cv = PR_NewCondVar(tp->ioq.lock);
+            if (NULL == jobp->cancel_cv) {
+                PR_Unlock(tp->ioq.lock);
+                PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
+                return PR_FAILURE;
+            }
+            /*
+             * mark job 'cancelled' and notify io thread(s)
+             * XXXX:
+             *      this assumes there is only one io thread; when there
+             *      are multiple threads, the io thread processing this job
+             *      must be notified.
+             */
+            jobp->cancel_io = PR_TRUE;
+            PR_Unlock(tp->ioq.lock);    /* release, reacquire ioq lock */
+            notify_ioq(tp);
+            PR_Lock(tp->ioq.lock);
+            while (jobp->cancel_io) {
+                PR_WaitCondVar(jobp->cancel_cv, PR_INTERVAL_NO_TIMEOUT);
+            }
+            PR_Unlock(tp->ioq.lock);
+            PR_ASSERT(!jobp->on_ioq);
+            if (!JOINABLE_JOB(jobp)) {
+                delete_job(jobp);
+            } else {
+                JOIN_NOTIFY(jobp);
+            }
+            rval = PR_SUCCESS;
+        } else {
+            PR_Unlock(tp->ioq.lock);
+        }
+    }
+    if (PR_FAILURE == rval) {
+        PR_SetError(PR_INVALID_STATE_ERROR, 0);
+    }
+    return rval;
+}
+
+/* join a job, wait until completion */
+PR_IMPLEMENT(PRStatus)
+PR_JoinJob(PRJob *jobp)
+{
+    if (!JOINABLE_JOB(jobp)) {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return PR_FAILURE;
+    }
+    PR_Lock(jobp->tpool->join_lock);
+    while(jobp->join_wait) {
+        PR_WaitCondVar(jobp->join_cv, PR_INTERVAL_NO_TIMEOUT);
+    }
+    PR_Unlock(jobp->tpool->join_lock);
+    delete_job(jobp);
+    return PR_SUCCESS;
+}
+
+/* shutdown threadpool */
+PR_IMPLEMENT(PRStatus)
+PR_ShutdownThreadPool(PRThreadPool *tpool)
+{
+    PRStatus rval = PR_SUCCESS;
+
+    PR_Lock(tpool->jobq.lock);
+    tpool->shutdown = PR_TRUE;
+    PR_NotifyAllCondVar(tpool->shutdown_cv);
+    PR_Unlock(tpool->jobq.lock);
+
+    return rval;
+}
+
+/*
+ * join thread pool
+ *  wait for termination of worker threads
+ *  reclaim threadpool resources
+ */
+PR_IMPLEMENT(PRStatus)
+PR_JoinThreadPool(PRThreadPool *tpool)
+{
+    PRStatus rval = PR_SUCCESS;
+    PRCList *head;
+    PRStatus rval_status;
+
+    PR_Lock(tpool->jobq.lock);
+    while (!tpool->shutdown) {
+        PR_WaitCondVar(tpool->shutdown_cv, PR_INTERVAL_NO_TIMEOUT);
+    }
+
+    /*
+     * wakeup worker threads
+     */
+#ifdef OPT_WINNT
+    /*
+     * post shutdown notification for all threads
+     */
+    {
+        int i;
+        for(i=0; i < tpool->current_threads; i++) {
+            PostQueuedCompletionStatus(tpool->jobq.nt_completion_port, 0,
+                                       TRUE, NULL);
+        }
+    }
+#else
+    PR_NotifyAllCondVar(tpool->jobq.cv);
+#endif
+
+    /*
+     * wakeup io thread(s)
+     */
+    notify_ioq(tpool);
+
+    /*
+     * wakeup timer thread(s)
+     */
+    PR_Lock(tpool->timerq.lock);
+    notify_timerq(tpool);
+    PR_Unlock(tpool->timerq.lock);
+
+    while (!PR_CLIST_IS_EMPTY(&tpool->jobq.wthreads)) {
+        wthread *wthrp;
+
+        head = PR_LIST_HEAD(&tpool->jobq.wthreads);
+        PR_REMOVE_AND_INIT_LINK(head);
+        PR_Unlock(tpool->jobq.lock);
+        wthrp = WTHREAD_LINKS_PTR(head);
+        rval_status = PR_JoinThread(wthrp->thread);
+        PR_ASSERT(PR_SUCCESS == rval_status);
+        PR_DELETE(wthrp);
+        PR_Lock(tpool->jobq.lock);
+    }
+    PR_Unlock(tpool->jobq.lock);
+    while (!PR_CLIST_IS_EMPTY(&tpool->ioq.wthreads)) {
+        wthread *wthrp;
+
+        head = PR_LIST_HEAD(&tpool->ioq.wthreads);
+        PR_REMOVE_AND_INIT_LINK(head);
+        wthrp = WTHREAD_LINKS_PTR(head);
+        rval_status = PR_JoinThread(wthrp->thread);
+        PR_ASSERT(PR_SUCCESS == rval_status);
+        PR_DELETE(wthrp);
+    }
+
+    while (!PR_CLIST_IS_EMPTY(&tpool->timerq.wthreads)) {
+        wthread *wthrp;
+
+        head = PR_LIST_HEAD(&tpool->timerq.wthreads);
+        PR_REMOVE_AND_INIT_LINK(head);
+        wthrp = WTHREAD_LINKS_PTR(head);
+        rval_status = PR_JoinThread(wthrp->thread);
+        PR_ASSERT(PR_SUCCESS == rval_status);
+        PR_DELETE(wthrp);
+    }
+
+    /*
+     * Delete queued jobs
+     */
+    while (!PR_CLIST_IS_EMPTY(&tpool->jobq.list)) {
+        PRJob *jobp;
+
+        head = PR_LIST_HEAD(&tpool->jobq.list);
+        PR_REMOVE_AND_INIT_LINK(head);
+        jobp = JOB_LINKS_PTR(head);
+        tpool->jobq.cnt--;
+        delete_job(jobp);
+    }
+
+    /* delete io jobs */
+    while (!PR_CLIST_IS_EMPTY(&tpool->ioq.list)) {
+        PRJob *jobp;
+
+        head = PR_LIST_HEAD(&tpool->ioq.list);
+        PR_REMOVE_AND_INIT_LINK(head);
+        tpool->ioq.cnt--;
+        jobp = JOB_LINKS_PTR(head);
+        delete_job(jobp);
+    }
+
+    /* delete timer jobs */
+    while (!PR_CLIST_IS_EMPTY(&tpool->timerq.list)) {
+        PRJob *jobp;
+
+        head = PR_LIST_HEAD(&tpool->timerq.list);
+        PR_REMOVE_AND_INIT_LINK(head);
+        tpool->timerq.cnt--;
+        jobp = JOB_LINKS_PTR(head);
+        delete_job(jobp);
+    }
+
+    PR_ASSERT(0 == tpool->jobq.cnt);
+    PR_ASSERT(0 == tpool->ioq.cnt);
+    PR_ASSERT(0 == tpool->timerq.cnt);
+
+    delete_threadpool(tpool);
+    return rval;
+}
diff --git a/nsprpub/pr/src/misc/prtrace.c b/nsprpub/pr/src/misc/prtrace.c
new file mode 100644
index 0000000000..ef6b65104e
--- /dev/null
+++ b/nsprpub/pr/src/misc/prtrace.c
@@ -0,0 +1,901 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+** prtrace.c -- NSPR Trace Instrumentation
+**
+** Implement the API defined in prtrace.h
+**
+**
+**
+*/
+
+#include <string.h>
+#include "primpl.h"
+
+
+#define DEFAULT_TRACE_BUFSIZE ( 1024 * 1024 )
+#define DEFAULT_BUFFER_SEGMENTS    2
+
+/*
+** Enumerate states in a RName structure
+*/
+typedef enum TraceState
+{
+    Running = 1,
+    Suspended = 2
+} TraceState;
+
+/*
+** Define QName structure
+*/
+typedef struct QName
+{
+    PRCList link;
+    PRCList rNameList;
+    char    name[PRTRACE_NAME_MAX+1];
+} QName;
+
+/*
+** Define RName structure
+*/
+typedef struct RName
+{
+    PRCList link;
+    PRLock  *lock;
+    QName   *qName;
+    TraceState state;
+    char    name[PRTRACE_NAME_MAX+1];
+    char    desc[PRTRACE_DESC_MAX+1];
+} RName;
+
+
+/*
+** The Trace Facility database
+**
+*/
+static PRLogModuleInfo *lm;
+
+static PRLock      *traceLock;      /* Facility Lock */
+static PRCList     qNameList;       /* anchor to all QName structures */
+static TraceState traceState = Running;
+
+/*
+** in-memory trace buffer controls
+*/
+static  PRTraceEntry    *tBuf;      /* pointer to buffer */
+static  PRInt32         bufSize;    /* size of buffer, in bytes, rounded up to sizeof(PRTraceEntry) */
+static  volatile PRInt32  next;     /* index to next PRTraceEntry */
+static  PRInt32         last;       /* index of highest numbered trace entry */
+
+/*
+** Real-time buffer capture controls
+*/
+static PRInt32 fetchLastSeen = 0;
+static PRBool  fetchLostData = PR_FALSE;
+
+/*
+** Buffer write-to-file controls
+*/
+static  PRLock      *logLock;               /* Sync lock */
+static  PRCondVar   *logCVar;               /* Sync Condidtion Variable */
+/*
+** Inter-thread state communication.
+** Controling thread writes to logOrder under protection of logCVar
+** the logging thread reads logOrder and sets logState on Notify.
+**
+** logSegments, logCount, logLostData must be read and written under
+** protection of logLock, logCVar.
+**
+*/
+static  enum LogState
+{
+    LogNotRunning,  /* Initial state */
+    LogReset,       /* Causes logger to re-calc controls */
+    LogActive,      /* Logging in progress, set only by log thread */
+    LogSuspend,     /* Suspend Logging */
+    LogResume,      /* Resume Logging => LogActive */
+    LogStop         /* Stop the log thread */
+}   logOrder, logState, localState;         /* controlling state variables */
+static  PRInt32     logSegments;            /* Number of buffer segments */
+static  PRInt32     logEntries;             /* number of Trace Entries in the buffer */
+static  PRInt32     logEntriesPerSegment;   /* number of PRTraceEntries per buffer segment */
+static  PRInt32     logSegSize;             /* size of buffer segment */
+static  PRInt32     logCount;               /* number of segments pending output */
+static  PRInt32     logLostData;            /* number of lost log buffer segments */
+
+/*
+** end Trace Database
+**
+*/
+
+/*
+** _PR_InitializeTrace() -- Initialize the trace facility
+*/
+static void NewTraceBuffer( PRInt32 size )
+{
+    /*
+    ** calculate the size of the buffer
+    ** round down so that each segment has the same number of
+    ** trace entries
+    */
+    logSegments = DEFAULT_BUFFER_SEGMENTS;
+    logEntries = size / sizeof(PRTraceEntry);
+    logEntriesPerSegment = logEntries / logSegments;
+    logEntries = logSegments * logEntriesPerSegment;
+    bufSize = logEntries * sizeof(PRTraceEntry);
+    logSegSize = logEntriesPerSegment * sizeof(PRTraceEntry);
+    PR_ASSERT( bufSize != 0);
+    PR_LOG( lm, PR_LOG_ERROR,
+            ("NewTraceBuffer: logSegments: %ld, logEntries: %ld, logEntriesPerSegment: %ld, logSegSize: %ld",
+             logSegments, logEntries, logEntriesPerSegment, logSegSize ));
+
+
+    tBuf = PR_Malloc( bufSize );
+    if ( tBuf == NULL )
+    {
+        PR_LOG( lm, PR_LOG_ERROR,
+                ("PRTrace: Failed to get trace buffer"));
+        PR_ASSERT( 0 );
+    }
+    else
+    {
+        PR_LOG( lm, PR_LOG_NOTICE,
+                ("PRTrace: Got trace buffer of size: %ld, at %p", bufSize, tBuf));
+    }
+
+    next = 0;
+    last = logEntries -1;
+    logCount = 0;
+    logLostData = PR_TRUE; /* not really on first call */
+    logOrder = LogReset;
+
+} /* end NewTraceBuffer() */
+
+/*
+** _PR_InitializeTrace() -- Initialize the trace facility
+*/
+static void _PR_InitializeTrace( void )
+{
+    /* The lock pointer better be null on this call */
+    PR_ASSERT( traceLock == NULL );
+
+    traceLock = PR_NewLock();
+    PR_ASSERT( traceLock != NULL );
+
+    PR_Lock( traceLock );
+
+    PR_INIT_CLIST( &qNameList );
+
+    lm = PR_NewLogModule("trace");
+
+    bufSize = DEFAULT_TRACE_BUFSIZE;
+    NewTraceBuffer( bufSize );
+
+    /* Initialize logging controls */
+    logLock = PR_NewLock();
+    logCVar = PR_NewCondVar( logLock );
+
+    PR_Unlock( traceLock );
+    return;
+} /* end _PR_InitializeTrace() */
+
+/*
+** Create a Trace Handle
+*/
+PR_IMPLEMENT(PRTraceHandle)
+PR_CreateTrace(
+    const char *qName,          /* QName for this trace handle */
+    const char *rName,          /* RName for this trace handle */
+    const char *description     /* description for this trace handle */
+)
+{
+    QName   *qnp;
+    RName   *rnp;
+    PRBool  matchQname = PR_FALSE;
+
+    /* Self initialize, if necessary */
+    if ( traceLock == NULL ) {
+        _PR_InitializeTrace();
+    }
+
+    /* Validate input arguments */
+    PR_ASSERT( strlen(qName) <= PRTRACE_NAME_MAX );
+    PR_ASSERT( strlen(rName) <= PRTRACE_NAME_MAX );
+    PR_ASSERT( strlen(description) <= PRTRACE_DESC_MAX );
+
+    PR_LOG( lm, PR_LOG_DEBUG,
+            ("PRTRACE: CreateTrace: Qname: %s, RName: %s", qName, rName));
+
+    /* Lock the Facility */
+    PR_Lock( traceLock );
+
+    /* Do we already have a matching QName? */
+    if (!PR_CLIST_IS_EMPTY( &qNameList ))
+    {
+        qnp = (QName *) PR_LIST_HEAD( &qNameList );
+        do {
+            if ( strcmp(qnp->name, qName) == 0)
+            {
+                matchQname = PR_TRUE;
+                break;
+            }
+            qnp = (QName *)PR_NEXT_LINK( &qnp->link );
+        } while( qnp != (QName *)&qNameList );
+    }
+    /*
+    ** If we did not find a matching QName,
+    **    allocate one and initialize it.
+    **    link it onto the qNameList.
+    **
+    */
+    if ( matchQname != PR_TRUE )
+    {
+        qnp = PR_NEWZAP( QName );
+        PR_ASSERT( qnp != NULL );
+        PR_INIT_CLIST( &qnp->link );
+        PR_INIT_CLIST( &qnp->rNameList );
+        strcpy( qnp->name, qName );
+        PR_APPEND_LINK( &qnp->link, &qNameList );
+    }
+
+    /* Do we already have a matching RName? */
+    if (!PR_CLIST_IS_EMPTY( &qnp->rNameList ))
+    {
+        rnp = (RName *) PR_LIST_HEAD( &qnp->rNameList );
+        do {
+            /*
+            ** No duplicate RNames are allowed within a QName
+            **
+            */
+            PR_ASSERT( strcmp(rnp->name, rName));
+            rnp = (RName *)PR_NEXT_LINK( &rnp->link );
+        } while( rnp != (RName *)&qnp->rNameList );
+    }
+
+    /* Get a new RName structure; initialize its members */
+    rnp = PR_NEWZAP( RName );
+    PR_ASSERT( rnp != NULL );
+    PR_INIT_CLIST( &rnp->link );
+    strcpy( rnp->name, rName );
+    strcpy( rnp->desc, description );
+    rnp->lock = PR_NewLock();
+    rnp->state = Running;
+    if ( rnp->lock == NULL )
+    {
+        PR_ASSERT(0);
+    }
+
+    PR_APPEND_LINK( &rnp->link, &qnp->rNameList ); /* add RName to QName's rnList */
+    rnp->qName = qnp;                       /* point the RName to the QName */
+
+    /* Unlock the Facility */
+    PR_Unlock( traceLock );
+    PR_LOG( lm, PR_LOG_DEBUG, ("PRTrace: Create: QName: %s %p, RName: %s %p\n\t",
+                               qName, qnp, rName, rnp ));
+
+    return((PRTraceHandle)rnp);
+} /* end  PR_CreateTrace() */
+
+/*
+**
+*/
+PR_IMPLEMENT(void)
+PR_DestroyTrace(
+    PRTraceHandle handle    /* Handle to be destroyed */
+)
+{
+    RName   *rnp = (RName *)handle;
+    QName   *qnp = rnp->qName;
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PRTrace: Deleting: QName: %s, RName: %s",
+                               qnp->name, rnp->name));
+
+    /* Lock the Facility */
+    PR_Lock( traceLock );
+
+    /*
+    ** Remove RName from the list of RNames in QName
+    ** and free RName
+    */
+    PR_LOG( lm, PR_LOG_DEBUG, ("PRTrace: Deleting RName: %s, %p",
+                               rnp->name, rnp));
+    PR_REMOVE_LINK( &rnp->link );
+    PR_Free( rnp->lock );
+    PR_DELETE( rnp );
+
+    /*
+    ** If this is the last RName within QName
+    **   remove QName from the qNameList and free it
+    */
+    if ( PR_CLIST_IS_EMPTY( &qnp->rNameList ) )
+    {
+        PR_LOG( lm, PR_LOG_DEBUG, ("PRTrace: Deleting unused QName: %s, %p",
+                                   qnp->name, qnp));
+        PR_REMOVE_LINK( &qnp->link );
+        PR_DELETE( qnp );
+    }
+
+    /* Unlock the Facility */
+    PR_Unlock( traceLock );
+    return;
+} /* end PR_DestroyTrace()  */
+
+/*
+** Create a TraceEntry in the trace buffer
+*/
+PR_IMPLEMENT(void)
+PR_Trace(
+    PRTraceHandle handle,       /* use this trace handle */
+    PRUint32    userData0,      /* User supplied data word 0 */
+    PRUint32    userData1,      /* User supplied data word 1 */
+    PRUint32    userData2,      /* User supplied data word 2 */
+    PRUint32    userData3,      /* User supplied data word 3 */
+    PRUint32    userData4,      /* User supplied data word 4 */
+    PRUint32    userData5,      /* User supplied data word 5 */
+    PRUint32    userData6,      /* User supplied data word 6 */
+    PRUint32    userData7       /* User supplied data word 7 */
+)
+{
+    PRTraceEntry   *tep;
+    PRInt32         mark;
+
+    if ( (traceState == Suspended )
+         || ( ((RName *)handle)->state == Suspended )) {
+        return;
+    }
+
+    /*
+    ** Get the next trace entry slot w/ minimum delay
+    */
+    PR_Lock( traceLock );
+
+    tep = &tBuf[next++];
+    if ( next > last ) {
+        next = 0;
+    }
+    if ( fetchLostData == PR_FALSE && next == fetchLastSeen ) {
+        fetchLostData = PR_TRUE;
+    }
+
+    mark = next;
+
+    PR_Unlock( traceLock );
+
+    /*
+    ** We have a trace entry. Fill it in.
+    */
+    tep->thread = PR_GetCurrentThread();
+    tep->handle = handle;
+    tep->time   = PR_Now();
+    tep->userData[0] = userData0;
+    tep->userData[1] = userData1;
+    tep->userData[2] = userData2;
+    tep->userData[3] = userData3;
+    tep->userData[4] = userData4;
+    tep->userData[5] = userData5;
+    tep->userData[6] = userData6;
+    tep->userData[7] = userData7;
+
+    /* When buffer segment is full, signal trace log thread to run */
+    if (( mark % logEntriesPerSegment) == 0 )
+    {
+        PR_Lock( logLock );
+        logCount++;
+        PR_NotifyCondVar( logCVar );
+        PR_Unlock( logLock );
+        /*
+        ** Gh0D! This is awful!
+        ** Anyway, to minimize lost trace data segments,
+        ** I inserted the PR_Sleep(0) to cause a context switch
+        ** so that the log thread could run.
+        ** I know, it perturbs the universe and may cause
+        ** funny things to happen in the optimized builds.
+        ** Take it out, lose data; leave it in risk Heisenberg.
+        */
+        /* PR_Sleep(0); */
+    }
+
+    return;
+} /* end PR_Trace() */
+
+/*
+**
+*/
+PR_IMPLEMENT(void)
+PR_SetTraceOption(
+    PRTraceOption command,  /* One of the enumerated values */
+    void *value             /* command value or NULL */
+)
+{
+    RName * rnp;
+
+    switch ( command )
+    {
+        case PRTraceBufSize :
+            PR_Lock( traceLock );
+            PR_Free( tBuf );
+            bufSize = *(PRInt32 *)value;
+            NewTraceBuffer( bufSize );
+            PR_Unlock( traceLock );
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("PRSetTraceOption: PRTraceBufSize: %ld", bufSize));
+            break;
+
+        case PRTraceEnable :
+            rnp = *(RName **)value;
+            rnp->state = Running;
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("PRSetTraceOption: PRTraceEnable: %p", rnp));
+            break;
+
+        case PRTraceDisable :
+            rnp = *(RName **)value;
+            rnp->state = Suspended;
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("PRSetTraceOption: PRTraceDisable: %p", rnp));
+            break;
+
+        case PRTraceSuspend :
+            traceState = Suspended;
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("PRSetTraceOption: PRTraceSuspend"));
+            break;
+
+        case PRTraceResume :
+            traceState = Running;
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("PRSetTraceOption: PRTraceResume"));
+            break;
+
+        case PRTraceSuspendRecording :
+            PR_Lock( logLock );
+            logOrder = LogSuspend;
+            PR_NotifyCondVar( logCVar );
+            PR_Unlock( logLock );
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("PRSetTraceOption: PRTraceSuspendRecording"));
+            break;
+
+        case PRTraceResumeRecording :
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("PRSetTraceOption: PRTraceResumeRecording"));
+            if ( logState != LogSuspend ) {
+                break;
+            }
+            PR_Lock( logLock );
+            logOrder = LogResume;
+            PR_NotifyCondVar( logCVar );
+            PR_Unlock( logLock );
+            break;
+
+        case PRTraceStopRecording :
+            PR_Lock( logLock );
+            logOrder = LogStop;
+            PR_NotifyCondVar( logCVar );
+            PR_Unlock( logLock );
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("PRSetTraceOption: PRTraceStopRecording"));
+            break;
+
+        case PRTraceLockHandles :
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("PRSetTraceOption: PRTraceLockTraceHandles"));
+            PR_Lock( traceLock );
+            break;
+
+        case PRTraceUnLockHandles :
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("PRSetTraceOption: PRTraceUnLockHandles"));
+            PR_Unlock( traceLock );
+            break;
+
+        default:
+            PR_LOG( lm, PR_LOG_ERROR,
+                    ("PRSetTraceOption: Invalid command %ld", command ));
+            PR_ASSERT( 0 );
+            break;
+    } /* end switch() */
+    return;
+} /* end  PR_SetTraceOption() */
+
+/*
+**
+*/
+PR_IMPLEMENT(void)
+PR_GetTraceOption(
+    PRTraceOption command,  /* One of the enumerated values */
+    void *value             /* command value or NULL */
+)
+{
+    switch ( command )
+    {
+        case PRTraceBufSize :
+            *((PRInt32 *)value) = bufSize;
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("PRGetTraceOption: PRTraceBufSize: %ld", bufSize ));
+            break;
+
+        default:
+            PR_LOG( lm, PR_LOG_ERROR,
+                    ("PRGetTraceOption: Invalid command %ld", command ));
+            PR_ASSERT( 0 );
+            break;
+    } /* end switch() */
+    return;
+} /* end PR_GetTraceOption() */
+
+/*
+**
+*/
+PR_IMPLEMENT(PRTraceHandle)
+PR_GetTraceHandleFromName(
+    const char *qName,      /* QName search argument */
+    const char *rName       /* RName search argument */
+)
+{
+    const char    *qn, *rn, *desc;
+    PRTraceHandle     qh, rh = NULL;
+    RName   *rnp = NULL;
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PRTrace: GetTraceHandleFromName:\n\t"
+                               "QName: %s, RName: %s", qName, rName ));
+
+    qh = PR_FindNextTraceQname( NULL );
+    while (qh != NULL)
+    {
+        rh = PR_FindNextTraceRname( NULL, qh );
+        while ( rh != NULL )
+        {
+            PR_GetTraceNameFromHandle( rh, &qn, &rn, &desc );
+            if ( (strcmp( qName, qn ) == 0)
+                 && (strcmp( rName, rn ) == 0 ))
+            {
+                rnp = (RName *)rh;
+                goto foundIt;
+            }
+            rh = PR_FindNextTraceRname( rh, qh );
+        }
+        qh = PR_FindNextTraceQname( NULL );
+    }
+
+foundIt:
+    PR_LOG( lm, PR_LOG_DEBUG, ("PR_Counter: GetConterHandleFromName: %p", rnp ));
+    return(rh);
+} /* end PR_GetTraceHandleFromName() */
+
+/*
+**
+*/
+PR_IMPLEMENT(void)
+PR_GetTraceNameFromHandle(
+    PRTraceHandle handle,       /* handle as search argument */
+    const char **qName,         /* pointer to associated QName */
+    const char **rName,         /* pointer to associated RName */
+    const char **description    /* pointer to associated description */
+)
+{
+    RName   *rnp = (RName *)handle;
+    QName   *qnp = rnp->qName;
+
+    *qName = qnp->name;
+    *rName = rnp->name;
+    *description = rnp->desc;
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PRTrace: GetConterNameFromHandle: "
+                               "QNp: %p, RNp: %p,\n\tQName: %s, RName: %s, Desc: %s",
+                               qnp, rnp, qnp->name, rnp->name, rnp->desc ));
+
+    return;
+} /* end PR_GetTraceNameFromHandle() */
+
+/*
+**
+*/
+PR_IMPLEMENT(PRTraceHandle)
+PR_FindNextTraceQname(
+    PRTraceHandle handle
+)
+{
+    QName *qnp = (QName *)handle;
+
+    if ( PR_CLIST_IS_EMPTY( &qNameList )) {
+        qnp = NULL;
+    }
+    else if ( qnp == NULL ) {
+        qnp = (QName *)PR_LIST_HEAD( &qNameList );
+    }
+    else if ( PR_NEXT_LINK( &qnp->link ) ==  &qNameList ) {
+        qnp = NULL;
+    }
+    else {
+        qnp = (QName *)PR_NEXT_LINK( &qnp->link );
+    }
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PRTrace: FindNextQname: Handle: %p, Returns: %p",
+                               handle, qnp ));
+
+    return((PRTraceHandle)qnp);
+} /* end PR_FindNextTraceQname() */
+
+/*
+**
+*/
+PR_IMPLEMENT(PRTraceHandle)
+PR_FindNextTraceRname(
+    PRTraceHandle rhandle,
+    PRTraceHandle qhandle
+)
+{
+    RName *rnp = (RName *)rhandle;
+    QName *qnp = (QName *)qhandle;
+
+
+    if ( PR_CLIST_IS_EMPTY( &qnp->rNameList )) {
+        rnp = NULL;
+    }
+    else if ( rnp == NULL ) {
+        rnp = (RName *)PR_LIST_HEAD( &qnp->rNameList );
+    }
+    else if ( PR_NEXT_LINK( &rnp->link ) ==  &qnp->rNameList ) {
+        rnp = NULL;
+    }
+    else {
+        rnp = (RName *)PR_NEXT_LINK( &rnp->link );
+    }
+
+    PR_LOG( lm, PR_LOG_DEBUG, ("PRTrace: FindNextRname: Rhandle: %p, QHandle: %p, Returns: %p",
+                               rhandle, qhandle, rnp ));
+
+    return((PRTraceHandle)rnp);
+} /* end PR_FindNextTraceRname() */
+
+/*
+**
+*/
+static PRFileDesc * InitializeRecording( void )
+{
+    char    *logFileName;
+    PRFileDesc  *logFile;
+
+    /* Self initialize, if necessary */
+    if ( traceLock == NULL ) {
+        _PR_InitializeTrace();
+    }
+
+    PR_LOG( lm, PR_LOG_DEBUG,
+            ("PR_RecordTraceEntries: begins"));
+
+    logLostData = 0; /* reset at entry */
+    logState = LogReset;
+
+    /* Get the filename for the logfile from the environment */
+    logFileName = PR_GetEnvSecure( "NSPR_TRACE_LOG" );
+    if ( logFileName == NULL )
+    {
+        PR_LOG( lm, PR_LOG_ERROR,
+                ("RecordTraceEntries: Environment variable not defined. Exiting"));
+        return NULL;
+    }
+
+    /* Open the logfile */
+    logFile = PR_Open( logFileName, PR_WRONLY | PR_CREATE_FILE, 0666 );
+    if ( logFile == NULL )
+    {
+        PR_LOG( lm, PR_LOG_ERROR,
+                ("RecordTraceEntries: Cannot open %s as trace log file. OS error: %ld",
+                 logFileName, PR_GetOSError()));
+        return NULL;
+    }
+    return logFile;
+} /* end InitializeRecording() */
+
+/*
+**
+*/
+static void ProcessOrders( void )
+{
+    switch ( logOrder )
+    {
+        case LogReset :
+            logOrder = logState = localState;
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("RecordTraceEntries: LogReset"));
+            break;
+
+        case LogSuspend :
+            localState = logOrder = logState = LogSuspend;
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("RecordTraceEntries: LogSuspend"));
+            break;
+
+        case LogResume :
+            localState = logOrder = logState = LogActive;
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("RecordTraceEntries: LogResume"));
+            break;
+
+        case LogStop :
+            logOrder = logState = LogStop;
+            PR_LOG( lm, PR_LOG_DEBUG,
+                    ("RecordTraceEntries: LogStop"));
+            break;
+
+        default :
+            PR_LOG( lm, PR_LOG_ERROR,
+                    ("RecordTraceEntries: Invalid logOrder: %ld", logOrder ));
+            PR_ASSERT( 0 );
+            break;
+    } /* end switch() */
+    return ;
+} /* end ProcessOrders() */
+
+/*
+**
+*/
+static void WriteTraceSegment( PRFileDesc *logFile, void *buf, PRInt32 amount )
+{
+    PRInt32 rc;
+
+
+    PR_LOG( lm, PR_LOG_ERROR,
+            ("WriteTraceSegment: Buffer: %p, Amount: %ld", buf, amount));
+    rc = PR_Write( logFile, buf, amount );
+    if ( rc == -1 )
+        PR_LOG( lm, PR_LOG_ERROR,
+                ("RecordTraceEntries: PR_Write() failed. Error: %ld", PR_GetError() ));
+    else if ( rc != amount )
+        PR_LOG( lm, PR_LOG_ERROR,
+                ("RecordTraceEntries: PR_Write() Tried to write: %ld, Wrote: %ld", amount, rc));
+    else
+        PR_LOG( lm, PR_LOG_DEBUG,
+                ("RecordTraceEntries: PR_Write(): Buffer: %p, bytes: %ld", buf, amount));
+
+    return;
+} /* end WriteTraceSegment() */
+
+/*
+**
+*/
+PR_IMPLEMENT(void)
+PR_RecordTraceEntries(
+    void
+)
+{
+    PRFileDesc  *logFile;
+    PRInt32     lostSegments;
+    PRInt32     currentSegment = 0;
+    void        *buf;
+    PRBool      doWrite;
+
+    logFile = InitializeRecording();
+    if ( logFile == NULL )
+    {
+        PR_LOG( lm, PR_LOG_DEBUG,
+                ("PR_RecordTraceEntries: Failed to initialize"));
+        return;
+    }
+
+    /* Do this until told to stop */
+    while ( logState != LogStop )
+    {
+
+        PR_Lock( logLock );
+
+        while ( (logCount == 0) && ( logOrder == logState ) ) {
+            PR_WaitCondVar( logCVar, PR_INTERVAL_NO_TIMEOUT );
+        }
+
+        /* Handle state transitions */
+        if ( logOrder != logState ) {
+            ProcessOrders();
+        }
+
+        /* recalculate local controls */
+        if ( logCount )
+        {
+            lostSegments = logCount - logSegments;
+            if ( lostSegments > 0 )
+            {
+                logLostData += ( logCount - logSegments );
+                logCount = (logCount % logSegments);
+                currentSegment = logCount;
+                PR_LOG( lm, PR_LOG_DEBUG,
+                        ("PR_RecordTraceEntries: LostData segments: %ld", logLostData));
+            }
+            else
+            {
+                logCount--;
+            }
+
+            buf = tBuf + ( logEntriesPerSegment * currentSegment );
+            if (++currentSegment >= logSegments ) {
+                currentSegment = 0;
+            }
+            doWrite = PR_TRUE;
+        }
+        else {
+            doWrite = PR_FALSE;
+        }
+
+        PR_Unlock( logLock );
+
+        if ( doWrite == PR_TRUE )
+        {
+            if ( localState != LogSuspend ) {
+                WriteTraceSegment( logFile, buf, logSegSize );
+            }
+            else
+                PR_LOG( lm, PR_LOG_DEBUG,
+                        ("RecordTraceEntries: PR_Write(): is suspended" ));
+        }
+
+    } /* end while(logState...) */
+
+    PR_Close( logFile );
+    PR_LOG( lm, PR_LOG_DEBUG,
+            ("RecordTraceEntries: exiting"));
+    return;
+} /* end  PR_RecordTraceEntries() */
+
+/*
+**
+*/
+PR_IMPLEMENT(PRIntn)
+PR_GetTraceEntries(
+    PRTraceEntry    *buffer,    /* where to write output */
+    PRInt32         count,      /* number to get */
+    PRInt32         *found      /* number you got */
+)
+{
+    PRInt32 rc;
+    PRInt32 copied = 0;
+
+    PR_Lock( traceLock );
+
+    /*
+    ** Depending on where the LastSeen and Next indices are,
+    ** copy the trace buffer in one or two pieces.
+    */
+    PR_LOG( lm, PR_LOG_ERROR,
+            ("PR_GetTraceEntries: Next: %ld, LastSeen: %ld", next, fetchLastSeen));
+
+    if ( fetchLastSeen <= next )
+    {
+        while (( count-- > 0 ) && (fetchLastSeen < next ))
+        {
+            *(buffer + copied++) = *(tBuf + fetchLastSeen++);
+        }
+        PR_LOG( lm, PR_LOG_ERROR,
+                ("PR_GetTraceEntries: Copied: %ld, LastSeen: %ld", copied, fetchLastSeen));
+    }
+    else /* copy in 2 parts */
+    {
+        while ( count-- > 0  && fetchLastSeen <= last )
+        {
+            *(buffer + copied++) = *(tBuf + fetchLastSeen++);
+        }
+        fetchLastSeen = 0;
+
+        PR_LOG( lm, PR_LOG_ERROR,
+                ("PR_GetTraceEntries: Copied: %ld, LastSeen: %ld", copied, fetchLastSeen));
+
+        while ( count-- > 0  && fetchLastSeen < next )
+        {
+            *(buffer + copied++) = *(tBuf + fetchLastSeen++);
+        }
+        PR_LOG( lm, PR_LOG_ERROR,
+                ("PR_GetTraceEntries: Copied: %ld, LastSeen: %ld", copied, fetchLastSeen));
+    }
+
+    *found = copied;
+    rc = ( fetchLostData == PR_TRUE )? 1 : 0;
+    fetchLostData = PR_FALSE;
+
+    PR_Unlock( traceLock );
+    return rc;
+} /* end PR_GetTraceEntries() */
+
+/* end prtrace.c */