path: root/stdlib/stdlib.h

/* Copyright (C) 1991-2007, 2009 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

/*
 *	ISO C99 Standard: 7.20 General utilities	<stdlib.h>
 */

#ifndef	_STDLIB_H

#include <features.h>

/* Get size_t, wchar_t and NULL from <stddef.h>.  */
#define		__need_size_t
#ifndef __need_malloc_and_calloc
# define	__need_wchar_t
# define	__need_NULL
#endif
#include <stddef.h>

__BEGIN_DECLS

#ifndef __need_malloc_and_calloc
#define	_STDLIB_H	1

#if defined __USE_XOPEN && !defined _SYS_WAIT_H
/* XPG requires a few symbols from <sys/wait.h> being defined.  */
# include <bits/waitflags.h>
# include <bits/waitstatus.h>

# ifdef __USE_BSD

/* Lots of hair to allow traditional BSD use of `union wait'
   as well as POSIX.1 use of `int' for the status word.  */

#  if defined __GNUC__ && !defined __cplusplus
#   define __WAIT_INT(status)						      \
  (__extension__ ({ union { __typeof(status) __in; int __i; } __u;	      \
		    __u.__in = (status); __u.__i; }))
#  else
#   define __WAIT_INT(status)	(*(int *) &(status))
#  endif

/* This is the type of the argument to `wait'.  The funky union
   causes redeclarations with ether `int *' or `union wait *' to be
   allowed without complaint.  __WAIT_STATUS_DEFN is the type used in
   the actual function definitions.  */

#  if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus
#   define __WAIT_STATUS	void *
#   define __WAIT_STATUS_DEFN	void *
#  else
/* This works in GCC 2.6.1 and later.  */
typedef union
  {
    union wait *__uptr;
    int *__iptr;
  } __WAIT_STATUS __attribute__ ((__transparent_union__));
#   define __WAIT_STATUS_DEFN	int *
#  endif

# else /* Don't use BSD.  */

#  define __WAIT_INT(status)	(status)
#  define __WAIT_STATUS		int *
#  define __WAIT_STATUS_DEFN	int *

# endif /* Use BSD.  */

/* Define the macros <sys/wait.h> also would define this way.  */
# define WEXITSTATUS(status)	__WEXITSTATUS(__WAIT_INT(status))
# define WTERMSIG(status)	__WTERMSIG(__WAIT_INT(status))
# define WSTOPSIG(status)	__WSTOPSIG(__WAIT_INT(status))
# define WIFEXITED(status)	__WIFEXITED(__WAIT_INT(status))
# define WIFSIGNALED(status)	__WIFSIGNALED(__WAIT_INT(status))
# define WIFSTOPPED(status)	__WIFSTOPPED(__WAIT_INT(status))
# ifdef __WIFCONTINUED
#  define WIFCONTINUED(status)	__WIFCONTINUED(__WAIT_INT(status))
# endif
#endif	/* X/Open and <sys/wait.h> not included.  */

__BEGIN_NAMESPACE_STD
/* Returned by `div'.  */
typedef struct
  {
    int quot;			/* Quotient.  */
    int rem;			/* Remainder.  */
  } div_t;

/* Returned by `ldiv'.  */
#ifndef __ldiv_t_defined
typedef struct
  {
    long int