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- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /*
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
-
- #include <stdio.h>
-
- #if defined(sgi)
- #ifndef IRIX
- error - IRIX is not defined
- #endif
- #endif
-
- #if defined(__sun)
- #if defined(__svr4) || defined(__svr4__) || defined(__SVR4)
- #ifndef SOLARIS
- error - SOLARIS is not defined
- #endif
- #else
- #ifndef SUNOS4
- error - SUNOS4 is not defined
- #endif
- #endif
- #endif
-
- #if defined(__hpux)
- #ifndef HPUX
- error - HPUX is not defined
- #endif
- #endif
-
- #if defined(__alpha)
- #if !(defined(_WIN32)) && !(defined(OSF1)) && !(defined(__linux))
- error - None of OSF1, _WIN32, or __linux 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
-
- /************************************************************************/
-
- /* Generate cpucfg.h */
-
- #ifdef XP_PC
- #ifdef WIN32
- #define INT64 _PRInt64
- #else
- #define INT64 long
- #endif
- #else
- #if defined(HPUX) || defined(NECSVR4) || defined(SCO) || defined(UNIXWARE) || defined (NCR)
- #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;
- }
-