/* 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.  */
extern double hypot ();

#endif /* not KPATHSEA_C_STD_H */
