1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/nsprpub/pr/include/gencfg.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,265 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include <stdio.h>
1.10 +
1.11 +#if defined(sgi)
1.12 +#ifndef IRIX
1.13 + error - IRIX is not defined
1.14 +#endif
1.15 +#endif
1.16 +
1.17 +#if defined(__sun)
1.18 +#ifndef SOLARIS
1.19 + error - SOLARIS is not defined
1.20 +#endif
1.21 +#endif
1.22 +
1.23 +#if defined(__hpux)
1.24 +#ifndef HPUX
1.25 + error - HPUX is not defined
1.26 +#endif
1.27 +#endif
1.28 +
1.29 +#if defined(__alpha)
1.30 +#if !(defined(_WIN32)) && !(defined(OSF1)) && !(defined(__linux)) && !(defined(__FreeBSD__))
1.31 + error - None of OSF1, _WIN32, __linux, or __FreeBSD__ is defined
1.32 +#endif
1.33 +#endif
1.34 +
1.35 +#if defined(_IBMR2)
1.36 +#ifndef AIX
1.37 + error - AIX is not defined
1.38 +#endif
1.39 +#endif
1.40 +
1.41 +#if defined(linux)
1.42 +#ifndef LINUX
1.43 + error - LINUX is not defined
1.44 +#endif
1.45 +#endif
1.46 +
1.47 +#if defined(bsdi)
1.48 +#ifndef BSDI
1.49 + error - BSDI is not defined
1.50 +#endif
1.51 +#endif
1.52 +
1.53 +#if defined(M_UNIX)
1.54 +#ifndef SCO
1.55 + error - SCO is not defined
1.56 +#endif
1.57 +#endif
1.58 +#if !defined(M_UNIX) && defined(_USLC_)
1.59 +#ifndef UNIXWARE
1.60 + error - UNIXWARE is not defined
1.61 +#endif
1.62 +#endif
1.63 +
1.64 +#if defined(__APPLE__)
1.65 +#ifndef DARWIN
1.66 + error - DARWIN is not defined
1.67 +#endif
1.68 +#endif
1.69 +
1.70 +/************************************************************************/
1.71 +
1.72 +/* Generate cpucfg.h */
1.73 +
1.74 +#ifdef XP_PC
1.75 +#ifdef WIN32
1.76 +#define INT64 _PRInt64
1.77 +#else
1.78 +#define INT64 long
1.79 +#endif
1.80 +#else
1.81 +#if defined(HPUX) || defined(SCO) || defined(UNIXWARE)
1.82 +#define INT64 long
1.83 +#else
1.84 +#define INT64 long long
1.85 +#endif
1.86 +#endif
1.87 +
1.88 +struct align_short {
1.89 + char c;
1.90 + short a;
1.91 +};
1.92 +struct align_int {
1.93 + char c;
1.94 + int a;
1.95 +};
1.96 +struct align_long {
1.97 + char c;
1.98 + long a;
1.99 +};
1.100 +struct align_PRInt64 {
1.101 + char c;
1.102 + INT64 a;
1.103 +};
1.104 +struct align_fakelonglong {
1.105 + char c;
1.106 + struct {
1.107 + long hi, lo;
1.108 + } a;
1.109 +};
1.110 +struct align_float {
1.111 + char c;
1.112 + float a;
1.113 +};
1.114 +struct align_double {
1.115 + char c;
1.116 + double a;
1.117 +};
1.118 +struct align_pointer {
1.119 + char c;
1.120 + void *a;
1.121 +};
1.122 +
1.123 +#define ALIGN_OF(type) \
1.124 + (((char*)&(((struct align_##type *)0)->a)) - ((char*)0))
1.125 +
1.126 +int bpb;
1.127 +
1.128 +/* Used if shell doesn't support redirection. By default, assume it does. */
1.129 +FILE *stream;
1.130 +
1.131 +static int Log2(int n)
1.132 +{
1.133 + int log2 = 0;
1.134 +
1.135 + if (n & (n-1))
1.136 + log2++;
1.137 + if (n >> 16)
1.138 + log2 += 16, n >>= 16;
1.139 + if (n >> 8)
1.140 + log2 += 8, n >>= 8;
1.141 + if (n >> 4)
1.142 + log2 += 4, n >>= 4;
1.143 + if (n >> 2)
1.144 + log2 += 2, n >>= 2;
1.145 + if (n >> 1)
1.146 + log2++;
1.147 + return log2;
1.148 +}
1.149 +
1.150 +/* We assume that int's are 32 bits */
1.151 +static void do64(void)
1.152 +{
1.153 + union {
1.154 + int i;
1.155 + char c[4];
1.156 + } u;
1.157 +
1.158 + u.i = 0x01020304;
1.159 + if (u.c[0] == 0x01) {
1.160 + fprintf(stream, "#undef IS_LITTLE_ENDIAN\n");
1.161 + fprintf(stream, "#define IS_BIG_ENDIAN 1\n\n");
1.162 + } else {
1.163 + fprintf(stream, "#define IS_LITTLE_ENDIAN 1\n");
1.164 + fprintf(stream, "#undef IS_BIG_ENDIAN\n\n");
1.165 + }
1.166 +}
1.167 +
1.168 +static void do32(void)
1.169 +{
1.170 + union {
1.171 + long i;
1.172 + char c[4];
1.173 + } u;
1.174 +
1.175 + u.i = 0x01020304;
1.176 + if (u.c[0] == 0x01) {
1.177 + fprintf(stream, "#undef IS_LITTLE_ENDIAN\n");
1.178 + fprintf(stream, "#define IS_BIG_ENDIAN 1\n\n");
1.179 + } else {
1.180 + fprintf(stream, "#define IS_LITTLE_ENDIAN 1\n");
1.181 + fprintf(stream, "#undef IS_BIG_ENDIAN\n\n");
1.182 + }
1.183 +}
1.184 +
1.185 +/*
1.186 +** Concievably this could actually be used; but there is lots of code out
1.187 +** there with and's and shift's in it that assumes a byte is 8 bits, so
1.188 +** forget about porting THIS code to those non 8 bit byte machines.
1.189 +*/
1.190 +static void BitsPerByte(void)
1.191 +{
1.192 + bpb = 8;
1.193 +}
1.194 +
1.195 +int main(int argc, char **argv)
1.196 +{
1.197 + BitsPerByte();
1.198 +
1.199 + /* If we got a command line argument, try to use it as the stream. */
1.200 + ++argv;
1.201 + if(*argv) {
1.202 + if(!(stream = fopen ( *argv, "wt" ))) {
1.203 + fprintf(stderr, "Could not write to output file %s.\n", *argv);
1.204 + return 1;
1.205 + }
1.206 + } else {
1.207 + stream = stdout;
1.208 + }
1.209 +
1.210 + fprintf(stream, "#ifndef nspr_cpucfg___\n");
1.211 + fprintf(stream, "#define nspr_cpucfg___\n\n");
1.212 +
1.213 + fprintf(stream, "/* AUTOMATICALLY GENERATED - DO NOT EDIT */\n\n");
1.214 +
1.215 + if (sizeof(long) == 8) {
1.216 + do64();
1.217 + } else {
1.218 + do32();
1.219 + }
1.220 + fprintf(stream, "#define PR_BYTES_PER_BYTE %d\n", sizeof(char));
1.221 + fprintf(stream, "#define PR_BYTES_PER_SHORT %d\n", sizeof(short));
1.222 + fprintf(stream, "#define PR_BYTES_PER_INT %d\n", sizeof(int));
1.223 + fprintf(stream, "#define PR_BYTES_PER_INT64 %d\n", 8);
1.224 + fprintf(stream, "#define PR_BYTES_PER_LONG %d\n", sizeof(long));
1.225 + fprintf(stream, "#define PR_BYTES_PER_FLOAT %d\n", sizeof(float));
1.226 + fprintf(stream, "#define PR_BYTES_PER_DOUBLE %d\n\n", sizeof(double));
1.227 +
1.228 + fprintf(stream, "#define PR_BITS_PER_BYTE %d\n", bpb);
1.229 + fprintf(stream, "#define PR_BITS_PER_SHORT %d\n", bpb * sizeof(short));
1.230 + fprintf(stream, "#define PR_BITS_PER_INT %d\n", bpb * sizeof(int));
1.231 + fprintf(stream, "#define PR_BITS_PER_INT64 %d\n", bpb * 8);
1.232 + fprintf(stream, "#define PR_BITS_PER_LONG %d\n", bpb * sizeof(long));
1.233 + fprintf(stream, "#define PR_BITS_PER_FLOAT %d\n", bpb * sizeof(float));
1.234 + fprintf(stream, "#define PR_BITS_PER_DOUBLE %d\n\n",
1.235 + bpb * sizeof(double));
1.236 +
1.237 + fprintf(stream, "#define PR_BITS_PER_BYTE_LOG2 %d\n", Log2(bpb));
1.238 + fprintf(stream, "#define PR_BITS_PER_SHORT_LOG2 %d\n",
1.239 + Log2(bpb * sizeof(short)));
1.240 + fprintf(stream, "#define PR_BITS_PER_INT_LOG2 %d\n",
1.241 + Log2(bpb * sizeof(int)));
1.242 + fprintf(stream, "#define PR_BITS_PER_INT64_LOG2 %d\n", 6);
1.243 + fprintf(stream, "#define PR_BITS_PER_LONG_LOG2 %d\n",
1.244 + Log2(bpb * sizeof(long)));
1.245 + fprintf(stream, "#define PR_BITS_PER_FLOAT_LOG2 %d\n",
1.246 + Log2(bpb * sizeof(float)));
1.247 + fprintf(stream, "#define PR_BITS_PER_DOUBLE_LOG2 %d\n\n",
1.248 + Log2(bpb * sizeof(double)));
1.249 +
1.250 + fprintf(stream, "#define PR_ALIGN_OF_SHORT %d\n", ALIGN_OF(short));
1.251 + fprintf(stream, "#define PR_ALIGN_OF_INT %d\n", ALIGN_OF(int));
1.252 + fprintf(stream, "#define PR_ALIGN_OF_LONG %d\n", ALIGN_OF(long));
1.253 + if (sizeof(INT64) < 8) {
1.254 + /* this machine doesn't actually support PRInt64's */
1.255 + fprintf(stream, "#define PR_ALIGN_OF_INT64 %d\n",
1.256 + ALIGN_OF(fakelonglong));
1.257 + } else {
1.258 + fprintf(stream, "#define PR_ALIGN_OF_INT64 %d\n", ALIGN_OF(PRInt64));
1.259 + }
1.260 + fprintf(stream, "#define PR_ALIGN_OF_FLOAT %d\n", ALIGN_OF(float));
1.261 + fprintf(stream, "#define PR_ALIGN_OF_DOUBLE %d\n", ALIGN_OF(double));
1.262 + fprintf(stream, "#define PR_ALIGN_OF_POINTER %d\n\n", ALIGN_OF(pointer));
1.263 +
1.264 + fprintf(stream, "#endif /* nspr_cpucfg___ */\n");
1.265 + fclose(stream);
1.266 +
1.267 + return 0;
1.268 +}
