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gecko-dev/nsprpub/pr/include/gencfg.c

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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
#if defined(__APPLE__)
#ifndef RHAPSODY
error - RHAPSODY is not defined
#endif
#endif
#if defined(__NeXT__)
#ifndef NEXTSTEP
error - NEXTSTEP 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;
}
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