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Diffstat (limited to 'nsprpub/pr/include/gencfg.c')
-rw-r--r--nsprpub/pr/include/gencfg.c265
1 files changed, 265 insertions, 0 deletions
diff --git a/nsprpub/pr/include/gencfg.c b/nsprpub/pr/include/gencfg.c
new file mode 100644
index 0000000000..3a67e9113e
--- /dev/null
+++ b/nsprpub/pr/include/gencfg.c
@@ -0,0 +1,265 @@
+/* -*- 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 <stdio.h>
+
+#if defined(__sun)
+#ifndef SOLARIS
+error - SOLARIS is not defined
+#endif
+#endif
+
+#if defined(__hpux)
+#ifndef HPUX
+error - HPUX is not defined
+#endif
+#endif
+
+#if defined(__alpha)
+#if !(defined(_WIN32)) && !(defined(__linux)) && !(defined(__FreeBSD__))
+error - None of _WIN32, __linux, or __FreeBSD__ is defined
+#endif
+#endif
+
+#if defined(_IBMR2)
+#ifndef AIX
+error - AIX is not defined
+#endif
+#endif
+
+#if defined(linux)
+#ifndef LINUX
+error - LINUX is not defined
+#endif
+#endif
+
+#if defined(bsdi)
+#ifndef BSDI
+error - BSDI is not defined
+#endif
+#endif
+
+#if defined(M_UNIX)
+#ifndef SCO
+error - SCO is not defined
+#endif
+#endif
+#if !defined(M_UNIX) && defined(_USLC_)
+#ifndef UNIXWARE
+error - UNIXWARE is not defined
+#endif
+#endif
+
+#if defined(__APPLE__)
+#ifndef DARWIN
+error - DARWIN is not defined
+#endif
+#endif
+
+/************************************************************************/
+
+/* Generate cpucfg.h */
+
+#ifdef XP_PC
+#ifdef WIN32
+#define INT64 _PRInt64
+#else
+#define INT64 long
+#endif
+#else
+#if defined(HPUX) || defined(SCO) || defined(UNIXWARE)
+#define INT64 long
+#else
+#define INT64 long long
+#endif
+#endif
+
+struct align_short {
+ char c;
+ short a;
+};
+struct align_int {
+ char c;
+ int a;
+};
+struct align_long {
+ char c;
+ long a;
+};
+struct align_PRInt64 {
+ char c;
+ INT64 a;
+};
+struct align_fakelonglong {
+ char c;
+ struct {
+ long hi, lo;
+ } a;
+};
+struct align_float {
+ char c;
+ float a;
+};
+struct align_double {
+ char c;
+ double a;
+};
+struct align_pointer {
+ char c;
+ void *a;
+};
+
+#define ALIGN_OF(type) \
+ (((char*)&(((struct align_##type *)0)->a)) - ((char*)0))
+
+int bpb;
+
+/* Used if shell doesn't support redirection. By default, assume it does. */
+FILE *stream;
+
+static int Log2(int n)
+{
+ int log2 = 0;
+
+ if (n & (n-1)) {
+ log2++;
+ }
+ if (n >> 16) {
+ log2 += 16, n >>= 16;
+ }
+ if (n >> 8) {
+ log2 += 8, n >>= 8;
+ }
+ if (n >> 4) {
+ log2 += 4, n >>= 4;
+ }
+ if (n >> 2) {
+ log2 += 2, n >>= 2;
+ }
+ if (n >> 1) {
+ log2++;
+ }
+ return log2;
+}
+
+/* We assume that int's are 32 bits */
+static void do64(void)
+{
+ union {
+ int i;
+ char c[4];
+ } u;
+
+ u.i = 0x01020304;
+ if (u.c[0] == 0x01) {
+ fprintf(stream, "#undef IS_LITTLE_ENDIAN\n");
+ fprintf(stream, "#define IS_BIG_ENDIAN 1\n\n");
+ } else {
+ fprintf(stream, "#define IS_LITTLE_ENDIAN 1\n");
+ fprintf(stream, "#undef IS_BIG_ENDIAN\n\n");
+ }
+}
+
+static void do32(void)
+{
+ union {
+ long i;
+ char c[4];
+ } u;
+
+ u.i = 0x01020304;
+ if (u.c[0] == 0x01) {
+ fprintf(stream, "#undef IS_LITTLE_ENDIAN\n");
+ fprintf(stream, "#define IS_BIG_ENDIAN 1\n\n");
+ } else {
+ fprintf(stream, "#define IS_LITTLE_ENDIAN 1\n");
+ fprintf(stream, "#undef IS_BIG_ENDIAN\n\n");
+ }
+}
+
+/*
+** Concievably this could actually be used; but there is lots of code out
+** there with and's and shift's in it that assumes a byte is 8 bits, so
+** forget about porting THIS code to those non 8 bit byte machines.
+*/
+static void BitsPerByte(void)
+{
+ bpb = 8;
+}
+
+int main(int argc, char **argv)
+{
+ BitsPerByte();
+
+ /* If we got a command line argument, try to use it as the stream. */
+ ++argv;
+ if(*argv) {
+ if(!(stream = fopen ( *argv, "wt" ))) {
+ fprintf(stderr, "Could not write to output file %s.\n", *argv);
+ return 1;
+ }
+ } else {
+ stream = stdout;
+ }
+
+ fprintf(stream, "#ifndef nspr_cpucfg___\n");
+ fprintf(stream, "#define nspr_cpucfg___\n\n");
+
+ fprintf(stream, "/* AUTOMATICALLY GENERATED - DO NOT EDIT */\n\n");
+
+ if (sizeof(long) == 8) {
+ do64();
+ } else {
+ do32();
+ }
+ fprintf(stream, "#define PR_BYTES_PER_BYTE %d\n", sizeof(char));
+ fprintf(stream, "#define PR_BYTES_PER_SHORT %d\n", sizeof(short));
+ fprintf(stream, "#define PR_BYTES_PER_INT %d\n", sizeof(int));
+ fprintf(stream, "#define PR_BYTES_PER_INT64 %d\n", 8);
+ fprintf(stream, "#define PR_BYTES_PER_LONG %d\n", sizeof(long));
+ fprintf(stream, "#define PR_BYTES_PER_FLOAT %d\n", sizeof(float));
+ fprintf(stream, "#define PR_BYTES_PER_DOUBLE %d\n\n", sizeof(double));
+
+ fprintf(stream, "#define PR_BITS_PER_BYTE %d\n", bpb);
+ fprintf(stream, "#define PR_BITS_PER_SHORT %d\n", bpb * sizeof(short));
+ fprintf(stream, "#define PR_BITS_PER_INT %d\n", bpb * sizeof(int));
+ fprintf(stream, "#define PR_BITS_PER_INT64 %d\n", bpb * 8);
+ fprintf(stream, "#define PR_BITS_PER_LONG %d\n", bpb * sizeof(long));
+ fprintf(stream, "#define PR_BITS_PER_FLOAT %d\n", bpb * sizeof(float));
+ fprintf(stream, "#define PR_BITS_PER_DOUBLE %d\n\n",
+ bpb * sizeof(double));
+
+ fprintf(stream, "#define PR_BITS_PER_BYTE_LOG2 %d\n", Log2(bpb));
+ fprintf(stream, "#define PR_BITS_PER_SHORT_LOG2 %d\n",
+ Log2(bpb * sizeof(short)));
+ fprintf(stream, "#define PR_BITS_PER_INT_LOG2 %d\n",
+ Log2(bpb * sizeof(int)));
+ fprintf(stream, "#define PR_BITS_PER_INT64_LOG2 %d\n", 6);
+ fprintf(stream, "#define PR_BITS_PER_LONG_LOG2 %d\n",
+ Log2(bpb * sizeof(long)));
+ fprintf(stream, "#define PR_BITS_PER_FLOAT_LOG2 %d\n",
+ Log2(bpb * sizeof(float)));
+ fprintf(stream, "#define PR_BITS_PER_DOUBLE_LOG2 %d\n\n",
+ Log2(bpb * sizeof(double)));
+
+ fprintf(stream, "#define PR_ALIGN_OF_SHORT %d\n", ALIGN_OF(short));
+ fprintf(stream, "#define PR_ALIGN_OF_INT %d\n", ALIGN_OF(int));
+ fprintf(stream, "#define PR_ALIGN_OF_LONG %d\n", ALIGN_OF(long));
+ if (sizeof(INT64) < 8) {
+ /* this machine doesn't actually support PRInt64's */
+ fprintf(stream, "#define PR_ALIGN_OF_INT64 %d\n",
+ ALIGN_OF(fakelonglong));
+ } else {
+ fprintf(stream, "#define PR_ALIGN_OF_INT64 %d\n", ALIGN_OF(PRInt64));
+ }
+ fprintf(stream, "#define PR_ALIGN_OF_FLOAT %d\n", ALIGN_OF(float));
+ fprintf(stream, "#define PR_ALIGN_OF_DOUBLE %d\n", ALIGN_OF(double));
+ fprintf(stream, "#define PR_ALIGN_OF_POINTER %d\n\n", ALIGN_OF(pointer));
+
+ fprintf(stream, "#endif /* nspr_cpucfg___ */\n");
+ fclose(stream);
+
+ return 0;
+}
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