Adding upstream version 2:9.0.1378.upstream/2%9.0.1378upstream

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

1 files changed, 891 insertions, 0 deletions

diff --git a/src/xxd/xxd.c b/src/xxd/xxd.c
new file mode 100644
index 0000000..2105a1c
--- /dev/null
+++ b/src/xxd/xxd.c
@@ -0,0 +1,891 @@
+/* xxd: my hexdump facility. jw
+ *
+ *  2.10.90 changed to word output
+ *  3.03.93 new indent style, dumb bug inserted and fixed.
+ *	    -c option, mls
+ * 26.04.94 better option parser, -ps, -l, -s added.
+ *  1.07.94 -r badly needs - as input file.  Per default autoskip over
+ *	       consecutive lines of zeroes, as unix od does.
+ *	    -a shows them too.
+ *	    -i dump as c-style #include "file.h"
+ *  1.11.95 if "xxd -i" knows the filename, an 'unsigned char filename_bits[]'
+ *	    array is written in correct c-syntax.
+ *	    -s improved, now defaults to absolute seek, relative requires a '+'.
+ *	    -r improved, now -r -s -0x... is supported.
+ *	       change/suppress leading '\0' bytes.
+ *	    -l n improved: stops exactly after n bytes.
+ *	    -r improved, better handling of partial lines with trailing garbage.
+ *	    -r improved, now -r -p works again!
+ *	    -r improved, less flushing, much faster now! (that was silly)
+ *  3.04.96 Per repeated request of a single person: autoskip defaults to off.
+ * 15.05.96 -v added. They want to know the version.
+ *	    -a fixed, to show last line inf file ends in all zeros.
+ *	    -u added: Print upper case hex-letters, as preferred by unix bc.
+ *	    -h added to usage message. Usage message extended.
+ *	    Now using outfile if specified even in normal mode, aehem.
+ *	    No longer mixing of ints and longs. May help doze people.
+ *	    Added binify ioctl for same reason. (Enough Doze stress for 1996!)
+ * 16.05.96 -p improved, removed occasional superfluous linefeed.
+ * 20.05.96 -l 0 fixed. tried to read anyway.
+ * 21.05.96 -i fixed. now honours -u, and prepends __ to numeric filenames.
+ *	    compile -DWIN32 for NT or W95. George V. Reilly, * -v improved :-)
+ *	    support --gnuish-longhorn-options
+ * 25.05.96 MAC support added: CodeWarrior already uses ``outline'' in Types.h
+ *	    which is included by MacHeaders (Axel Kielhorn). Renamed to
+ *	    xxdline().
+ *  7.06.96 -i printed 'int' instead of 'char'. *blush*
+ *	    added Bram's OS2 ifdefs...
+ * 18.07.96 gcc -Wall @ SunOS4 is now silent.
+ *	    Added osver for MSDOS/DJGPP/WIN32.
+ * 29.08.96 Added size_t to strncmp() for Amiga.
+ * 24.03.97 Windows NT support (Phil Hanna). Clean exit for Amiga WB (Bram)
+ * 02.04.97 Added -E option, to have EBCDIC translation instead of ASCII
+ *	    (azc10@yahoo.com)
+ * 22.05.97 added -g (group octets) option (jcook@namerica.kla.com).
+ * 23.09.98 nasty -p -r misfeature fixed: slightly wrong output, when -c was
+ *	    missing or wrong.
+ * 26.09.98 Fixed: 'xxd -i infile outfile' did not truncate outfile.
+ * 27.10.98 Fixed: -g option parser required blank.
+ *	    option -b added: 01000101 binary output in normal format.
+ * 16.05.00 Added VAXC changes by Stephen P. Wall
+ * 16.05.00 Improved MMS file and merge for VMS by Zoltan Arpadffy
+ * 2011 March  Better error handling by Florian Zumbiehl.
+ * 2011 April  Formatting by Bram Moolenaar
+ * 08.06.2013  Little-endian hexdump (-e) and offset (-o) by Vadim Vygonets.
+ * 11.01.2019  Add full 64/32 bit range to -o and output by Christer Jensen.
+ * 04.02.2020  Add -d for decimal offsets by Aapo Rantalainen
+ * 14.01.2022  Disable extra newlines with -c0 -p by Erik Auerswald.
+ * 20.06.2022  Permit setting the variable names used by -i by David Gow
+ *
+ * (c) 1990-1998 by Juergen Weigert (jnweiger@gmail.com)
+ *
+ * I hereby grant permission to distribute and use xxd
+ * under X11-MIT or GPL-2.0 (at the user's choice).
+ *
+ * Contributions by Bram Moolenaar et al.
+ */
+
+/* Visual Studio 2005 has 'deprecated' many of the standard CRT functions */
+#if _MSC_VER >= 1400
+# define _CRT_SECURE_NO_DEPRECATE
+# define _CRT_NONSTDC_NO_DEPRECATE
+#endif
+#if !defined(CYGWIN) && defined(__CYGWIN__)
+# define CYGWIN
+#endif
+
+#if (defined(__linux__) && !defined(__ANDROID__)) || defined(__CYGWIN__)
+# define _XOPEN_SOURCE 700   /* for fdopen() */
+#endif
+
+#include <stdio.h>
+#ifdef VAXC
+# include <file.h>
+#else
+# include <fcntl.h>
+#endif
+#if defined(WIN32) || defined(CYGWIN)
+# include <io.h>	/* for setmode() */
+#else
+# ifdef UNIX
+#  include <unistd.h>
+# endif
+#endif
+#include <stdlib.h>
+#include <string.h>	/* for strncmp() */
+#include <ctype.h>	/* for isalnum() */
+#include <limits.h>
+#if __MWERKS__ && !defined(BEBOX)
+# include <unix.h>	/* for fdopen() on MAC */
+#endif
+
+
+/*  This corrects the problem of missing prototypes for certain functions
+ *  in some GNU installations (e.g. SunOS 4.1.x).
+ *  Darren Hiebert <darren@hmi.com> (sparc-sun-sunos4.1.3_U1/2.7.2.2)
+ */
+#if defined(__GNUC__) && defined(__STDC__)
+# ifndef __USE_FIXED_PROTOTYPES__
+#  define __USE_FIXED_PROTOTYPES__
+# endif
+#endif
+
+#ifndef __USE_FIXED_PROTOTYPES__
+/*
+ * This is historic and works only if the compiler really has no prototypes:
+ *
+ * Include prototypes for Sun OS 4.x, when using an ANSI compiler.
+ * FILE is defined on OS 4.x, not on 5.x (Solaris).
+ * if __SVR4 is defined (some Solaris versions), don't include this.
+ */
+#if defined(sun) && defined(FILE) && !defined(__SVR4) && defined(__STDC__)
+#  define __P(a) a
+/* excerpt from my sun_stdlib.h */
+extern int fprintf __P((FILE *, char *, ...));
+extern int fputs   __P((char *, FILE *));
+extern int _flsbuf __P((unsigned char, FILE *));
+extern int _filbuf __P((FILE *));
+extern int fflush  __P((FILE *));
+extern int fclose  __P((FILE *));
+extern int fseek   __P((FILE *, long, int));
+extern int rewind  __P((FILE *));
+
+extern void perror __P((char *));
+# endif
+#endif
+
+char version[] = "xxd 2022-01-14 by Juergen Weigert et al.";
+#ifdef WIN32
+char osver[] = " (Win32)";
+#else
+char osver[] = "";
+#endif
+
+#if defined(WIN32)
+# define BIN_READ(yes)  ((yes) ? "rb" : "rt")
+# define BIN_WRITE(yes) ((yes) ? "wb" : "wt")
+# define BIN_CREAT(yes) ((yes) ? (O_CREAT|O_BINARY) : O_CREAT)
+# define BIN_ASSIGN(fp, yes) setmode(fileno(fp), (yes) ? O_BINARY : O_TEXT)
+# define PATH_SEP '\\'
+#elif defined(CYGWIN)
+# define BIN_READ(yes)  ((yes) ? "rb" : "rt")
+# define BIN_WRITE(yes) ((yes) ? "wb" : "w")
+# define BIN_CREAT(yes) ((yes) ? (O_CREAT|O_BINARY) : O_CREAT)
+# define BIN_ASSIGN(fp, yes) ((yes) ? (void) setmode(fileno(fp), O_BINARY) : (void) (fp))
+# define PATH_SEP '/'
+#else
+# ifdef VMS
+#  define BIN_READ(dummy)  "r"
+#  define BIN_WRITE(dummy) "w"
+#  define BIN_CREAT(dummy) O_CREAT
+#  define BIN_ASSIGN(fp, dummy) fp
+#  define PATH_SEP ']'
+#  define FILE_SEP '.'
+# else
+#  define BIN_READ(dummy)  "r"
+#  define BIN_WRITE(dummy) "w"
+#  define BIN_CREAT(dummy) O_CREAT
+#  define BIN_ASSIGN(fp, dummy) fp
+#  define PATH_SEP '/'
+# endif
+#endif
+
+/* open has only to arguments on the Mac */
+#if __MWERKS__
+# define OPEN(name, mode, umask) open(name, mode)
+#else
+# define OPEN(name, mode, umask) open(name, mode, umask)
+#endif
+
+#ifdef AMIGA
+# define STRNCMP(s1, s2, l) strncmp(s1, s2, (size_t)l)
+#else
+# define STRNCMP(s1, s2, l) strncmp(s1, s2, l)
+#endif
+
+#ifndef __P
+# if defined(__STDC__) || defined(WIN32)
+#  define __P(a) a
+# else
+#  define __P(a) ()
+# endif
+#endif
+
+#define TRY_SEEK	/* attempt to use lseek, or skip forward by reading */
+#define COLS 256	/* change here, if you ever need more columns */
+#define LLEN ((2*(int)sizeof(unsigned long)) + 4 + (9*COLS-1) + COLS + 2)
+
+char hexxa[] = "0123456789abcdef0123456789ABCDEF", *hexx = hexxa;
+
+/* the different hextypes known by this program: */
+#define HEX_NORMAL 0
+#define HEX_POSTSCRIPT 1
+#define HEX_CINCLUDE 2
+#define HEX_BITS 3		/* not hex a dump, but bits: 01111001 */
+#define HEX_LITTLEENDIAN 4
+
+#define CONDITIONAL_CAPITALIZE(c) (capitalize ? toupper((int)c) : c)
+
+static char *pname;
+
+  static void
+exit_with_usage(void)
+{
+  fprintf(stderr, "Usage:\n       %s [options] [infile [outfile]]\n", pname);
+  fprintf(stderr, "    or\n       %s -r [-s [-]offset] [-c cols] [-ps] [infile [outfile]]\n", pname);
+  fprintf(stderr, "Options:\n");
+  fprintf(stderr, "    -a          toggle autoskip: A single '*' replaces nul-lines. Default off.\n");
+  fprintf(stderr, "    -b          binary digit dump (incompatible with -ps,-i,-r). Default hex.\n");
+  fprintf(stderr, "    -C          capitalize variable names in C include file style (-i).\n");
+  fprintf(stderr, "    -c cols     format <cols> octets per line. Default 16 (-i: 12, -ps: 30).\n");
+  fprintf(stderr, "    -E          show characters in EBCDIC. Default ASCII.\n");
+  fprintf(stderr, "    -e          little-endian dump (incompatible with -ps,-i,-r).\n");
+  fprintf(stderr, "    -g bytes    number of octets per group in normal output. Default 2 (-e: 4).\n");
+  fprintf(stderr, "    -h          print this summary.\n");
+  fprintf(stderr, "    -i          output in C include file style.\n");
+  fprintf(stderr, "    -l len      stop after <len> octets.\n");
+  fprintf(stderr, "    -n name     set the variable name used in C include output (-i).\n");
+  fprintf(stderr, "    -o off      add <off> to the displayed file position.\n");
+  fprintf(stderr, "    -ps         output in postscript plain hexdump style.\n");
+  fprintf(stderr, "    -r          reverse operation: convert (or patch) hexdump into binary.\n");
+  fprintf(stderr, "    -r -s off   revert with <off> added to file positions found in hexdump.\n");
+  fprintf(stderr, "    -d          show offset in decimal instead of hex.\n");
+  fprintf(stderr, "    -s %sseek  start at <seek> bytes abs. %sinfile offset.\n",
+#ifdef TRY_SEEK
+	  "[+][-]", "(or +: rel.) ");
+#else
+	  "", "");
+#endif
+  fprintf(stderr, "    -u          use upper case hex letters.\n");
+  fprintf(stderr, "    -v          show version: \"%s%s\".\n", version, osver);
+  exit(1);
+}
+
+  static void
+perror_exit(int ret)
+{
+  fprintf(stderr, "%s: ", pname);
+  perror(NULL);
+  exit(ret);
+}
+
+  static void
+error_exit(int ret, char *msg)
+{
+  fprintf(stderr, "%s: %s\n", pname, msg);
+  exit(ret);
+}
+
+  static int
+getc_or_die(FILE *fpi)
+{
+  int c = getc(fpi);
+  if (c == EOF && ferror(fpi))
+    perror_exit(2);
+  return c;
+}
+
+  static void
+putc_or_die(int c, FILE *fpo)
+{
+  if (putc(c, fpo) == EOF)
+    perror_exit(3);
+}
+
+  static void
+fputs_or_die(char *s, FILE *fpo)
+{
+  if (fputs(s, fpo) == EOF)
+    perror_exit(3);
+}
+
+/* Use a macro to allow for different arguments. */
+#define FPRINTF_OR_DIE(args) if (fprintf args < 0) perror_exit(3)
+
+  static void
+fclose_or_die(FILE *fpi, FILE *fpo)
+{
+  if (fclose(fpo) != 0)
+    perror_exit(3);
+  if (fclose(fpi) != 0)
+    perror_exit(2);
+}
+
+/*
+ * If "c" is a hex digit, return the value.
+ * Otherwise return -1.
+ */
+  static int
+parse_hex_digit(int c)
+{
+  return (c >= '0' && c <= '9') ? c - '0'
+	: (c >= 'a' && c <= 'f') ? c - 'a' + 10
+	: (c >= 'A' && c <= 'F') ? c - 'A' + 10
+	: -1;
+}
+
+/*
+ * Ignore text on "fpi" until end-of-line or end-of-file.
+ * Return the '\n' or EOF character.
+ * When an error is encountered exit with an error message.
+ */
+  static int
+skip_to_eol(FILE *fpi, int c)
+{
+  while (c != '\n' && c != EOF)
+    c = getc_or_die(fpi);
+  return c;
+}
+
+/*
+ * Max. cols binary characters are decoded from the input stream per line.
+ * Two adjacent garbage characters after evaluated data delimit valid data.
+ * Everything up to the next newline is discarded.
+ *
+ * The name is historic and came from 'undo type opt h'.
+ */
+  static int
+huntype(
+  FILE *fpi,
+  FILE *fpo,
+  int cols,
+  int hextype,
+  long base_off)
+{
+  int c, ign_garb = 1, n1 = -1, n2 = 0, n3, p = cols;
+  long have_off = 0, want_off = 0;
+
+  rewind(fpi);
+
+  while ((c = getc(fpi)) != EOF)
+    {
+      if (c == '\r')	/* Doze style input file? */
+	continue;
+
+      /* Allow multiple spaces.  This doesn't work when there is normal text
+       * after the hex codes in the last line that looks like hex, thus only
+       * use it for PostScript format. */
+      if (hextype == HEX_POSTSCRIPT && (c == ' ' || c == '\n' || c == '\t'))
+	continue;
+
+      n3 = n2;
+      n2 = n1;
+
+      n1 = parse_hex_digit(c);
+      if (n1 == -1 && ign_garb)
+	continue;
+
+      ign_garb = 0;
+
+      if (!hextype && (p >= cols))
+	{
+	  if (n1 < 0)
+	    {
+	      p = 0;
+	      continue;
+	    }
+	  want_off = (want_off << 4) | n1;
+	  continue;
+	}
+
+      if (base_off + want_off != have_off)
+	{
+	  if (fflush(fpo) != 0)
+	    perror_exit(3);
+#ifdef TRY_SEEK
+	  if (fseek(fpo, base_off + want_off - have_off, SEEK_CUR) >= 0)
+	    have_off = base_off + want_off;
+#endif
+	  if (base_off + want_off < have_off)
+	    error_exit(5, "Sorry, cannot seek backwards.");
+	  for (; have_off < base_off + want_off; have_off++)
+	    putc_or_die(0, fpo);
+	}
+
+      if (n2 >= 0 && n1 >= 0)
+	{
+	  putc_or_die((n2 << 4) | n1, fpo);
+	  have_off++;
+	  want_off++;
+	  n1 = -1;
+	  if (!hextype && (++p >= cols))
+	    /* skip the rest of the line as garbage */
+	    c = skip_to_eol(fpi, c);
+	}
+      else if (n1 < 0 && n2 < 0 && n3 < 0)
+        /* already stumbled into garbage, skip line, wait and see */
+	c = skip_to_eol(fpi, c);
+
+      if (c == '\n')
+	{
+	  if (!hextype)
+	    want_off = 0;
+	  p = cols;
+	  ign_garb = 1;
+	}
+    }
+  if (fflush(fpo) != 0)
+    perror_exit(3);
+#ifdef TRY_SEEK
+  fseek(fpo, 0L, SEEK_END);
+#endif
+  fclose_or_die(fpi, fpo);
+  return 0;
+}
+
+/*
+ * Print line l. If nz is false, xxdline regards the line a line of
+ * zeroes. If there are three or more consecutive lines of zeroes,
+ * they are replaced by a single '*' character.
+ *
+ * If the output ends with more than two lines of zeroes, you
+ * should call xxdline again with l being the last line and nz
+ * negative. This ensures that the last line is shown even when
+ * it is all zeroes.
+ *
+ * If nz is always positive, lines are never suppressed.
+ */
+  static void
+xxdline(FILE *fp, char *l, int nz)
+{
+  static char z[LLEN+1];
+  static int zero_seen = 0;
+
+  if (!nz && zero_seen == 1)
+    strcpy(z, l);
+
+  if (nz || !zero_seen++)
+    {
+      if (nz)
+	{
+	  if (nz < 0)
+	    zero_seen--;
+	  if (zero_seen == 2)
+	    fputs_or_die(z, fp);
+	  if (zero_seen > 2)
+	    fputs_or_die("*\n", fp);
+	}
+      if (nz >= 0 || zero_seen > 0)
+	fputs_or_die(l, fp);
+      if (nz)
+	zero_seen = 0;
+    }
+}
+
+/* This is an EBCDIC to ASCII conversion table */
+/* from a proposed BTL standard April 16, 1979 */
+static unsigned char etoa64[] =
+{
+    0040,0240,0241,0242,0243,0244,0245,0246,
+    0247,0250,0325,0056,0074,0050,0053,0174,
+    0046,0251,0252,0253,0254,0255,0256,0257,
+    0260,0261,0041,0044,0052,0051,0073,0176,
+    0055,0057,0262,0263,0264,0265,0266,0267,
+    0270,0271,0313,0054,0045,0137,0076,0077,
+    0272,0273,0274,0275,0276,0277,0300,0301,
+    0302,0140,0072,0043,0100,0047,0075,0042,
+    0303,0141,0142,0143,0144,0145,0146,0147,
+    0150,0151,0304,0305,0306,0307,0310,0311,
+    0312,0152,0153,0154,0155,0156,0157,0160,
+    0161,0162,0136,0314,0315,0316,0317,0320,
+    0321,0345,0163,0164,0165,0166,0167,0170,
+    0171,0172,0322,0323,0324,0133,0326,0327,
+    0330,0331,0332,0333,0334,0335,0336,0337,
+    0340,0341,0342,0343,0344,0135,0346,0347,
+    0173,0101,0102,0103,0104,0105,0106,0107,
+    0110,0111,0350,0351,0352,0353,0354,0355,
+    0175,0112,0113,0114,0115,0116,0117,0120,
+    0121,0122,0356,0357,0360,0361,0362,0363,
+    0134,0237,0123,0124,0125,0126,0127,0130,
+    0131,0132,0364,0365,0366,0367,0370,0371,
+    0060,0061,0062,0063,0064,0065,0066,0067,
+    0070,0071,0372,0373,0374,0375,0376,0377
+};
+
+  int
+main(int argc, char *argv[])
+{
+  FILE *fp, *fpo;
+  int c, e, p = 0, relseek = 1, negseek = 0, revert = 0;
+  int cols = 0, colsgiven = 0, nonzero = 0, autoskip = 0, hextype = HEX_NORMAL;
+  int capitalize = 0, decimal_offset = 0;
+  int ebcdic = 0;
+  int octspergrp = -1;	/* number of octets grouped in output */
+  int grplen;		/* total chars per octet group */
+  long length = -1, n = 0, seekoff = 0;
+  unsigned long displayoff = 0;
+  static char l[LLEN+1];  /* static because it may be too big for stack */
+  char *pp;
+  char *varname = NULL;
+  int addrlen = 9;
+
+#ifdef AMIGA
+  /* This program doesn't work when started from the Workbench */
+  if (argc == 0)
+    exit(1);
+#endif
+
+  pname = argv[0];
+  for (pp = pname; *pp; )
+    if (*pp++ == PATH_SEP)
+      pname = pp;
+#ifdef FILE_SEP
+  for (pp = pname; *pp; pp++)
+    if (*pp == FILE_SEP)
+      {
+	*pp = '\0';
+	break;
+      }
+#endif
+
+  while (argc >= 2)
+    {
+      pp = argv[1] + (!STRNCMP(argv[1], "--", 2) && argv[1][2]);
+	   if (!STRNCMP(pp, "-a", 2)) autoskip = 1 - autoskip;
+      else if (!STRNCMP(pp, "-b", 2)) hextype = HEX_BITS;
+      else if (!STRNCMP(pp, "-e", 2)) hextype = HEX_LITTLEENDIAN;
+      else if (!STRNCMP(pp, "-u", 2)) hexx = hexxa + 16;
+      else if (!STRNCMP(pp, "-p", 2)) hextype = HEX_POSTSCRIPT;
+      else if (!STRNCMP(pp, "-i", 2)) hextype = HEX_CINCLUDE;
+      else if (!STRNCMP(pp, "-C", 2)) capitalize = 1;
+      else if (!STRNCMP(pp, "-d", 2)) decimal_offset = 1;
+      else if (!STRNCMP(pp, "-r", 2)) revert++;
+      else if (!STRNCMP(pp, "-E", 2)) ebcdic++;
+      else if (!STRNCMP(pp, "-v", 2))
+	{
+	  fprintf(stderr, "%s%s\n", version, osver);
+	  exit(0);
+	}
+      else if (!STRNCMP(pp, "-c", 2))
+	{
+	  if (pp[2] && !STRNCMP("apitalize", pp + 2, 9))
+	    capitalize = 1;
+	  else if (pp[2] && STRNCMP("ols", pp + 2, 3))
+	    {
+	      colsgiven = 1;
+	      cols = (int)strtol(pp + 2, NULL, 0);
+	    }
+	  else
+	    {
+	      if (!argv[2])
+		exit_with_usage();
+	      colsgiven = 1;
+	      cols = (int)strtol(argv[2], NULL, 0);
+	      argv++;
+	      argc--;
+	    }
+	}
+      else if (!STRNCMP(pp, "-g", 2))
+	{
+	  if (pp[2] && STRNCMP("roup", pp + 2, 4))
+	    octspergrp = (int)strtol(pp + 2, NULL, 0);
+	  else
+	    {
+	      if (!argv[2])
+		exit_with_usage();
+	      octspergrp = (int)strtol(argv[2], NULL, 0);
+	      argv++;
+	      argc--;
+	    }
+	}
+      else if (!STRNCMP(pp, "-o", 2))
+	{
+	  int reloffset = 0;
+	  int negoffset = 0;
+	  if (pp[2] && STRNCMP("ffset", pp + 2, 5))
+	    displayoff = strtoul(pp + 2, NULL, 0);
+	  else
+	    {
+	      if (!argv[2])
+		exit_with_usage();
+
+	      if (argv[2][0] == '+')
+	       reloffset++;
+	     if (argv[2][reloffset] == '-')
+	       negoffset++;
+
+	     if (negoffset)
+	       displayoff = ULONG_MAX - strtoul(argv[2] + reloffset+negoffset, NULL, 0) + 1;
+	     else
+	       displayoff = strtoul(argv[2] + reloffset+negoffset, NULL, 0);
+
+	      argv++;
+	      argc--;
+	    }
+	}
+      else if (!STRNCMP(pp, "-s", 2))
+	{
+	  relseek = 0;
+	  negseek = 0;
+	  if (pp[2] && STRNCMP("kip", pp+2, 3) && STRNCMP("eek", pp+2, 3))
+	    {
+#ifdef TRY_SEEK
+	      if (pp[2] == '+')
+		relseek++;
+	      if (pp[2+relseek] == '-')
+		negseek++;
+#endif
+	      seekoff = strtol(pp + 2+relseek+negseek, (char **)NULL, 0);
+	    }
+	  else
+	    {
+	      if (!argv[2])
+		exit_with_usage();
+#ifdef TRY_SEEK
+	      if (argv[2][0] == '+')
+		relseek++;
+	      if (argv[2][relseek] == '-')
+		negseek++;
+#endif
+	      seekoff = strtol(argv[2] + relseek+negseek, (char **)NULL, 0);
+	      argv++;
+	      argc--;
+	    }
+	}
+      else if (!STRNCMP(pp, "-l", 2))
+	{
+	  if (pp[2] && STRNCMP("en", pp + 2, 2))
+	    length = strtol(pp + 2, (char **)NULL, 0);
+	  else
+	    {
+	      if (!argv[2])
+		exit_with_usage();
+	      length = strtol(argv[2], (char **)NULL, 0);
+	      argv++;
+	      argc--;
+	    }
+	}
+      else if (!STRNCMP(pp, "-n", 2))
+        {
+          if (pp[2] && STRNCMP("ame", pp + 2, 3))
+            varname = pp + 2;
+          else
+            {
+              if (!argv[2])
+                exit_with_usage();
+              varname = argv[2];
+              argv++;
+              argc--;
+            }
+        }
+      else if (!strcmp(pp, "--"))	/* end of options */
+	{
+	  argv++;
+	  argc--;
+	  break;
+	}
+      else if (pp[0] == '-' && pp[1])	/* unknown option */
+	exit_with_usage();
+      else
+	break;				/* not an option */
+
+      argv++;				/* advance to next argument */
+      argc--;
+    }
+
+  if (!colsgiven || (!cols && hextype != HEX_POSTSCRIPT))
+    switch (hextype)
+      {
+      case HEX_POSTSCRIPT:	cols = 30; break;
+      case HEX_CINCLUDE:	cols = 12; break;
+      case HEX_BITS:		cols = 6; break;
+      case HEX_NORMAL:
+      case HEX_LITTLEENDIAN:
+      default:			cols = 16; break;
+      }
+
+  if (octspergrp < 0)
+    switch (hextype)
+      {
+      case HEX_BITS:		octspergrp = 1; break;
+      case HEX_NORMAL:		octspergrp = 2; break;
+      case HEX_LITTLEENDIAN:	octspergrp = 4; break;
+      case HEX_POSTSCRIPT:
+      case HEX_CINCLUDE:
+      default:			octspergrp = 0; break;
+      }
+
+  if ((hextype == HEX_POSTSCRIPT && cols < 0) ||
+      (hextype != HEX_POSTSCRIPT && cols < 1) ||
+      ((hextype == HEX_NORMAL || hextype == HEX_BITS || hextype == HEX_LITTLEENDIAN)
+							    && (cols > COLS)))
+    {
+      fprintf(stderr, "%s: invalid number of columns (max. %d).\n", pname, COLS);
+      exit(1);
+    }
+
+  if (octspergrp < 1 || octspergrp > cols)
+    octspergrp = cols;
+  else if (hextype == HEX_LITTLEENDIAN && (octspergrp & (octspergrp-1)))
+    error_exit(1, "number of octets per group must be a power of 2 with -e.");
+
+  if (argc > 3)
+    exit_with_usage();
+
+  if (argc == 1 || (argv[1][0] == '-' && !argv[1][1]))
+    BIN_ASSIGN(fp = stdin, !revert);
+  else
+    {
+      if ((fp = fopen(argv[1], BIN_READ(!revert))) == NULL)
+	{
+	  fprintf(stderr,"%s: ", pname);
+	  perror(argv[1]);
+	  return 2;
+	}
+    }
+
+  if (argc < 3 || (argv[2][0] == '-' && !argv[2][1]))
+    BIN_ASSIGN(fpo = stdout, revert);
+  else
+    {
+      int fd;
+      int mode = revert ? O_WRONLY : (O_TRUNC|O_WRONLY);
+
+      if (((fd = OPEN(argv[2], mode | BIN_CREAT(revert), 0666)) < 0) ||
+	  (fpo = fdopen(fd, BIN_WRITE(revert))) == NULL)
+	{
+	  fprintf(stderr, "%s: ", pname);
+	  perror(argv[2]);
+	  return 3;
+	}
+      rewind(fpo);
+    }
+
+  if (revert)
+    {
+      if (hextype && (hextype != HEX_POSTSCRIPT))
+	error_exit(-1, "Sorry, cannot revert this type of hexdump");
+      return huntype(fp, fpo, cols, hextype,
+		negseek ? -seekoff : seekoff);
+    }
+
+  if (seekoff || negseek || !relseek)
+    {
+#ifdef TRY_SEEK
+      if (relseek)
+	e = fseek(fp, negseek ? -seekoff : seekoff, SEEK_CUR);
+      else
+	e = fseek(fp, negseek ? -seekoff : seekoff,
+						negseek ? SEEK_END : SEEK_SET);
+      if (e < 0 && negseek)
+	error_exit(4, "Sorry, cannot seek.");
+      if (e >= 0)
+	seekoff = ftell(fp);
+      else
+#endif
+	{
+	  long s = seekoff;
+
+	  while (s--)
+	    if (getc_or_die(fp) == EOF)
+	    {
+	      error_exit(4, "Sorry, cannot seek.");
+	    }
+	}
+    }
+
+  if (hextype == HEX_CINCLUDE)
+    {
+      /* A user-set variable name overrides fp == stdin */
+      if (varname == NULL && fp != stdin)
+        varname = argv[1];
+
+      if (varname != NULL)
+	{
+	  FPRINTF_OR_DIE((fpo, "unsigned char %s", isdigit((int)varname[0]) ? "__" : ""));
+	  for (e = 0; (c = varname[e]) != 0; e++)
+	    putc_or_die(isalnum(c) ? CONDITIONAL_CAPITALIZE(c) : '_', fpo);
+	  fputs_or_die("[] = {\n", fpo);
+	}
+
+      p = 0;
+      while ((length < 0 || p < length) && (c = getc_or_die(fp)) != EOF)
+	{
+	  FPRINTF_OR_DIE((fpo, (hexx == hexxa) ? "%s0x%02x" : "%s0X%02X",
+		(p % cols) ? ", " : (!p ? "  " : ",\n  "), c));
+	  p++;
+	}
+
+      if (p)
+	fputs_or_die("\n", fpo);
+
+      if (varname != NULL)
+	{
+	  fputs_or_die("};\n", fpo);
+	  FPRINTF_OR_DIE((fpo, "unsigned int %s", isdigit((int)varname[0]) ? "__" : ""));
+	  for (e = 0; (c = varname[e]) != 0; e++)
+	    putc_or_die(isalnum(c) ? CONDITIONAL_CAPITALIZE(c) : '_', fpo);
+	  FPRINTF_OR_DIE((fpo, "_%s = %d;\n", capitalize ? "LEN" : "len", p));
+	}
+
+      fclose_or_die(fp, fpo);
+      return 0;
+    }
+
+  if (hextype == HEX_POSTSCRIPT)
+    {
+      p = cols;
+      while ((length < 0 || n < length) && (e = getc_or_die(fp)) != EOF)
+	{
+	  putc_or_die(hexx[(e >> 4) & 0xf], fpo);
+	  putc_or_die(hexx[e & 0xf], fpo);
+	  n++;
+	  if (cols > 0 && !--p)
+	    {
+	      putc_or_die('\n', fpo);
+	      p = cols;
+	    }
+	}
+      if (cols == 0 || p < cols)
+	putc_or_die('\n', fpo);
+      fclose_or_die(fp, fpo);
+      return 0;
+    }
+
+  /* hextype: HEX_NORMAL or HEX_BITS or HEX_LITTLEENDIAN */
+
+  if (hextype != HEX_BITS)
+    grplen = octspergrp + octspergrp + 1;	/* chars per octet group */
+  else	/* hextype == HEX_BITS */
+    grplen = 8 * octspergrp + 1;
+
+  while ((length < 0 || n < length) && (e = getc_or_die(fp)) != EOF)
+    {
+      int x;
+
+      if (p == 0)
+	{
+	  addrlen = sprintf(l, decimal_offset ? "%08ld:" : "%08lx:",
+				  ((unsigned long)(n + seekoff + displayoff)));
+	  for (c = addrlen; c < LLEN; l[c++] = ' ');
+	}
+      x = hextype == HEX_LITTLEENDIAN ? p ^ (octspergrp-1) : p;
+      c = addrlen + 1 + (grplen * x) / octspergrp;
+      if (hextype == HEX_NORMAL || hextype == HEX_LITTLEENDIAN)
+	{
+	  l[c]   = hexx[(e >> 4) & 0xf];
+	  l[++c] = hexx[e & 0xf];
+	}
+      else /* hextype == HEX_BITS */
+	{
+	  int i;
+	  for (i = 7; i >= 0; i--)
+	    l[c++] = (e & (1 << i)) ? '1' : '0';
+	}
+      if (e)
+	nonzero++;
+      if (ebcdic)
+	e = (e < 64) ? '.' : etoa64[e-64];
+      /* When changing this update definition of LLEN above. */
+      c = addrlen + 3 + (grplen * cols - 1)/octspergrp + p;
+      l[c++] =
+#ifdef __MVS__
+	  (e >= 64)
+#else
+	  (e > 31 && e < 127)
+#endif
+	  ? e : '.';
+      n++;
+      if (++p == cols)
+	{
+	  l[c] = '\n';
+	  l[++c] = '\0';
+	  xxdline(fpo, l, autoskip ? nonzero : 1);
+	  nonzero = 0;
+	  p = 0;
+	}
+    }
+  if (p)
+    {
+      l[c] = '\n';
+      l[++c] = '\0';
+      xxdline(fpo, l, 1);
+    }
+  else if (autoskip)
+    xxdline(fpo, l, -1);	/* last chance to flush out suppressed lines */
+
+  fclose_or_die(fp, fpo);
+  return 0;
+}
+
+/* vi:set ts=8 sw=4 sts=2 cino+={2 cino+=n-2 : */