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c-std.h
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C/C++ Source or Header
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1996-09-28
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109 lines
/* c-std.h: the first header files.
Copyright (C) 1992, 93 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef KPATHSEA_C_STD_H
#define KPATHSEA_C_STD_H
/* X uses these symbols to say whether we have <stddef.h>, <string.h>,
etc. We never use them ourselves. */
#ifdef STDC_HEADERS
#define SYSV
#else
#define X_NOT_STDC_ENV
#endif
/* Header files that essentially all of our sources need, and
that all implementations have. We include these first, to help with
NULL being defined multiple times. */
#include <math.h>
#include <stdio.h>
/* Be sure we have constants from <unistd.h>. */
#include <kpathsea/c-unistd.h>
#if HAVE_STDLIB_H
#include <stdlib.h>
/* Include <stdlib.h> before <stddef.h>, to help avoid NULL
redefinitions on some systems. (We don't include <stddef.h>
ourselves any more, but FYI.) */
#else
/* It's impossible to say for sure what the system will deign to put in
<stdlib.h>, but let's hope it's at least these. */
extern char *getenv ();
#ifndef ALLOC_RETURN_TYPE
#ifdef DOS
#define ALLOC_RETURN_TYPE void
#else
#define ALLOC_RETURN_TYPE char
#endif /* not DOS */
#endif /* not ALLOC_RETURN_TYPE */
#ifndef _MALLOC_INTERNAL
/* Don't bother to declare these if we are compiling gmalloc.c itself. */
extern ALLOC_RETURN_TYPE *calloc (), *malloc (), *realloc ();
#endif
#endif /* not STDC_HEADERS */
/* SunOS 4.1.1 gets STDC_HEADERS defined, but it doesn't provide
EXIT_FAILURE. So far no system has defined one of EXIT_FAILURE and
EXIT_SUCCESS without the other. */
#ifndef EXIT_SUCCESS
#ifdef VMS
#define EXIT_SUCCESS 1
#define EXIT_FAILURE 0
#else
#define EXIT_SUCCESS 0
#define EXIT_FAILURE 1
#endif
#endif /* not EXIT_SUCCESS */
/* strchr vs. index, memcpy vs. bcopy, etc. */
#include <kpathsea/c-memstr.h>
/* Error numbers and errno declaration. */
#include <kpathsea/c-errno.h>
/* Numeric minima and maxima. */
#include <kpathsea/c-minmax.h>
/* Assertions are too useful to not make generally available. */
#ifdef HAVE_ASSERT_H
#include <assert.h>
#else
#define assert(expr) /* as nothing */
#endif
#ifdef VMS
#include <unixlib.h>
#include <unixio.h>
#else
/* `popen' and `pclose' are part of POSIX.2, not POSIX.1. So
STDC_HEADERS isn't enough. */
extern FILE *popen ();
extern int pclose ();
#endif
/* hypot appears not to have made it into POSIX.2, even. */
#ifndef __amigaos__
extern const double hypot ();
#endif
#endif /* not KPATHSEA_C_STD_H */