michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include <stdio.h>
michael@0: 
michael@0: #if defined(sgi)
michael@0: #ifndef IRIX
michael@0: 	error - IRIX is not defined
michael@0: #endif
michael@0: #endif
michael@0: 
michael@0: #if defined(__sun)
michael@0: #ifndef SOLARIS
michael@0: 	error - SOLARIS is not defined
michael@0: #endif
michael@0: #endif
michael@0: 
michael@0: #if defined(__hpux)
michael@0: #ifndef HPUX
michael@0: 	error - HPUX is not defined
michael@0: #endif
michael@0: #endif
michael@0: 
michael@0: #if defined(__alpha) 
michael@0: #if !(defined(_WIN32)) && !(defined(OSF1)) && !(defined(__linux)) && !(defined(__FreeBSD__))
michael@0: 	error - None of OSF1, _WIN32, __linux, or __FreeBSD__ is defined
michael@0: #endif
michael@0: #endif
michael@0: 
michael@0: #if defined(_IBMR2)
michael@0: #ifndef AIX
michael@0: 	error - AIX is not defined
michael@0: #endif
michael@0: #endif
michael@0: 
michael@0: #if defined(linux)
michael@0: #ifndef LINUX
michael@0: 	error - LINUX is not defined
michael@0: #endif
michael@0: #endif
michael@0: 
michael@0: #if defined(bsdi)
michael@0: #ifndef BSDI
michael@0: 	error - BSDI is not defined
michael@0: #endif
michael@0: #endif
michael@0: 
michael@0: #if defined(M_UNIX)
michael@0: #ifndef SCO
michael@0:       error - SCO is not defined
michael@0: #endif
michael@0: #endif
michael@0: #if !defined(M_UNIX) && defined(_USLC_)
michael@0: #ifndef UNIXWARE
michael@0:       error - UNIXWARE is not defined
michael@0: #endif
michael@0: #endif
michael@0: 
michael@0: #if defined(__APPLE__)
michael@0: #ifndef DARWIN
michael@0:       error - DARWIN is not defined
michael@0: #endif
michael@0: #endif
michael@0: 
michael@0: /************************************************************************/
michael@0: 
michael@0: /* Generate cpucfg.h */
michael@0: 
michael@0: #ifdef XP_PC
michael@0: #ifdef WIN32
michael@0: #define INT64	_PRInt64
michael@0: #else
michael@0: #define INT64	long
michael@0: #endif
michael@0: #else
michael@0: #if defined(HPUX) || defined(SCO) || defined(UNIXWARE)
michael@0: #define INT64	long
michael@0: #else
michael@0: #define INT64	long long
michael@0: #endif
michael@0: #endif
michael@0: 
michael@0: struct align_short {
michael@0:     char c;
michael@0:     short a;
michael@0: };
michael@0: struct align_int {
michael@0:     char c;
michael@0:     int a;
michael@0: };
michael@0: struct align_long {
michael@0:     char c;
michael@0:     long a;
michael@0: };
michael@0: struct align_PRInt64 {
michael@0:     char c;
michael@0:     INT64 a;
michael@0: };
michael@0: struct align_fakelonglong {
michael@0:     char c;
michael@0:     struct {
michael@0: 	long hi, lo;
michael@0:     } a;
michael@0: };
michael@0: struct align_float {
michael@0:     char c;
michael@0:     float a;
michael@0: };
michael@0: struct align_double {
michael@0:     char c;
michael@0:     double a;
michael@0: };
michael@0: struct align_pointer {
michael@0:     char c;
michael@0:     void *a;
michael@0: };
michael@0: 
michael@0: #define ALIGN_OF(type) \
michael@0:     (((char*)&(((struct align_##type *)0)->a)) - ((char*)0))
michael@0: 
michael@0: int bpb;
michael@0: 
michael@0: /* Used if shell doesn't support redirection. By default, assume it does. */
michael@0: FILE *stream;
michael@0: 
michael@0: static int Log2(int n)
michael@0: {
michael@0:     int log2 = 0;
michael@0: 
michael@0:     if (n & (n-1))
michael@0: 	log2++;
michael@0:     if (n >> 16)
michael@0: 	log2 += 16, n >>= 16;
michael@0:     if (n >> 8)
michael@0: 	log2 += 8, n >>= 8;
michael@0:     if (n >> 4)
michael@0: 	log2 += 4, n >>= 4;
michael@0:     if (n >> 2)
michael@0: 	log2 += 2, n >>= 2;
michael@0:     if (n >> 1)
michael@0: 	log2++;
michael@0:     return log2;
michael@0: }
michael@0: 
michael@0: /* We assume that int's are 32 bits */
michael@0: static void do64(void)
michael@0: {
michael@0:     union {
michael@0: 	int i;
michael@0: 	char c[4];
michael@0:     } u;
michael@0: 
michael@0:     u.i = 0x01020304;
michael@0:     if (u.c[0] == 0x01) {
michael@0: 	fprintf(stream, "#undef  IS_LITTLE_ENDIAN\n");
michael@0: 	fprintf(stream, "#define IS_BIG_ENDIAN 1\n\n");
michael@0:     } else {
michael@0: 	fprintf(stream, "#define IS_LITTLE_ENDIAN 1\n");
michael@0: 	fprintf(stream, "#undef  IS_BIG_ENDIAN\n\n");
michael@0:     }
michael@0: }
michael@0: 
michael@0: static void do32(void)
michael@0: {
michael@0:     union {
michael@0: 	long i;
michael@0: 	char c[4];
michael@0:     } u;
michael@0: 
michael@0:     u.i = 0x01020304;
michael@0:     if (u.c[0] == 0x01) {
michael@0: 	fprintf(stream, "#undef  IS_LITTLE_ENDIAN\n");
michael@0: 	fprintf(stream, "#define IS_BIG_ENDIAN 1\n\n");
michael@0:     } else {
michael@0: 	fprintf(stream, "#define IS_LITTLE_ENDIAN 1\n");
michael@0: 	fprintf(stream, "#undef  IS_BIG_ENDIAN\n\n");
michael@0:     }
michael@0: }
michael@0: 
michael@0: /*
michael@0: ** Concievably this could actually be used; but there is lots of code out
michael@0: ** there with and's and shift's in it that assumes a byte is 8 bits, so
michael@0: ** forget about porting THIS code to those non 8 bit byte machines.
michael@0: */
michael@0: static void BitsPerByte(void)
michael@0: {
michael@0:     bpb = 8;
michael@0: }
michael@0: 
michael@0: int main(int argc, char **argv)
michael@0: {
michael@0:     BitsPerByte();
michael@0: 
michael@0:     /* If we got a command line argument, try to use it as the stream. */
michael@0:     ++argv;
michael@0:     if(*argv) {
michael@0:         if(!(stream = fopen ( *argv, "wt" ))) {
michael@0:             fprintf(stderr, "Could not write to output file %s.\n", *argv);
michael@0:             return 1;
michael@0:         }
michael@0:     } else {
michael@0: 		stream = stdout;
michael@0: 	}
michael@0: 
michael@0:     fprintf(stream, "#ifndef nspr_cpucfg___\n");
michael@0:     fprintf(stream, "#define nspr_cpucfg___\n\n");
michael@0: 
michael@0:     fprintf(stream, "/* AUTOMATICALLY GENERATED - DO NOT EDIT */\n\n");
michael@0: 
michael@0:     if (sizeof(long) == 8) {
michael@0: 	do64();
michael@0:     } else {
michael@0: 	do32();
michael@0:     }
michael@0:     fprintf(stream, "#define PR_BYTES_PER_BYTE   %d\n", sizeof(char));
michael@0:     fprintf(stream, "#define PR_BYTES_PER_SHORT  %d\n", sizeof(short));
michael@0:     fprintf(stream, "#define PR_BYTES_PER_INT    %d\n", sizeof(int));
michael@0:     fprintf(stream, "#define PR_BYTES_PER_INT64  %d\n", 8);
michael@0:     fprintf(stream, "#define PR_BYTES_PER_LONG   %d\n", sizeof(long));
michael@0:     fprintf(stream, "#define PR_BYTES_PER_FLOAT  %d\n", sizeof(float));
michael@0:     fprintf(stream, "#define PR_BYTES_PER_DOUBLE %d\n\n", sizeof(double));
michael@0: 
michael@0:     fprintf(stream, "#define PR_BITS_PER_BYTE    %d\n", bpb);
michael@0:     fprintf(stream, "#define PR_BITS_PER_SHORT   %d\n", bpb * sizeof(short));
michael@0:     fprintf(stream, "#define PR_BITS_PER_INT     %d\n", bpb * sizeof(int));
michael@0:     fprintf(stream, "#define PR_BITS_PER_INT64   %d\n", bpb * 8);
michael@0:     fprintf(stream, "#define PR_BITS_PER_LONG    %d\n", bpb * sizeof(long));
michael@0:     fprintf(stream, "#define PR_BITS_PER_FLOAT   %d\n", bpb * sizeof(float));
michael@0:     fprintf(stream, "#define PR_BITS_PER_DOUBLE  %d\n\n", 
michael@0:             bpb * sizeof(double));
michael@0: 
michael@0:     fprintf(stream, "#define PR_BITS_PER_BYTE_LOG2   %d\n", Log2(bpb));
michael@0:     fprintf(stream, "#define PR_BITS_PER_SHORT_LOG2  %d\n", 
michael@0:             Log2(bpb * sizeof(short)));
michael@0:     fprintf(stream, "#define PR_BITS_PER_INT_LOG2    %d\n", 
michael@0:             Log2(bpb * sizeof(int)));
michael@0:     fprintf(stream, "#define PR_BITS_PER_INT64_LOG2  %d\n", 6);
michael@0:     fprintf(stream, "#define PR_BITS_PER_LONG_LOG2   %d\n", 
michael@0:             Log2(bpb * sizeof(long)));
michael@0:     fprintf(stream, "#define PR_BITS_PER_FLOAT_LOG2  %d\n", 
michael@0:             Log2(bpb * sizeof(float)));
michael@0:     fprintf(stream, "#define PR_BITS_PER_DOUBLE_LOG2 %d\n\n", 
michael@0:             Log2(bpb * sizeof(double)));
michael@0: 
michael@0:     fprintf(stream, "#define PR_ALIGN_OF_SHORT   %d\n", ALIGN_OF(short));
michael@0:     fprintf(stream, "#define PR_ALIGN_OF_INT     %d\n", ALIGN_OF(int));
michael@0:     fprintf(stream, "#define PR_ALIGN_OF_LONG    %d\n", ALIGN_OF(long));
michael@0:     if (sizeof(INT64) < 8) {
michael@0: 	/* this machine doesn't actually support PRInt64's */
michael@0: 	fprintf(stream, "#define PR_ALIGN_OF_INT64   %d\n", 
michael@0:                 ALIGN_OF(fakelonglong));
michael@0:     } else {
michael@0: 	fprintf(stream, "#define PR_ALIGN_OF_INT64   %d\n", ALIGN_OF(PRInt64));
michael@0:     }
michael@0:     fprintf(stream, "#define PR_ALIGN_OF_FLOAT   %d\n", ALIGN_OF(float));
michael@0:     fprintf(stream, "#define PR_ALIGN_OF_DOUBLE  %d\n", ALIGN_OF(double));
michael@0:     fprintf(stream, "#define PR_ALIGN_OF_POINTER %d\n\n", ALIGN_OF(pointer));
michael@0: 
michael@0:     fprintf(stream, "#endif /* nspr_cpucfg___ */\n");
michael@0:     fclose(stream);
michael@0: 
michael@0:     return 0;
michael@0: }