/* -*- 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 #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; }