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/* xmalloc.c -- malloc with out of memory checking
Copyright (C) 1990-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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; version 2 of the License, 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, see <https://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define VOID void
#include <sys/types.h>
#if STDC_HEADERS || _LIBC
#include <stdlib.h>
static VOID *fixup_null_alloc (size_t n) __THROW;
VOID *xmalloc (size_t n) __THROW;
VOID *xcalloc (size_t n, size_t s) __THROW;
VOID *xrealloc (VOID *p, size_t n) __THROW;
#else
VOID *calloc ();
VOID *malloc ();
VOID *realloc ();
void free ();
#endif
#include <libintl.h>
#include "error.h"
#ifndef _
# define _(str) gettext (str)
#endif
#ifndef EXIT_FAILURE
#define EXIT_FAILURE 4
#endif
/* Exit value when the requested amount of memory is not available.
The caller may set it to some other value. */
int xmalloc_exit_failure = EXIT_FAILURE;
static VOID *
fixup_null_alloc (size_t n)
{
VOID *p;
p = 0;
if (n == 0)
p = malloc ((size_t) 1);
if (p == 0)
error (xmalloc_exit_failure, 0, _("memory exhausted"));
return p;
}
/* Allocate N bytes of memory dynamically, with error checking. */
VOID *
xmalloc (size_t n)
{
VOID *p;
p = malloc (n);
if (p == 0)
p = fixup_null_alloc (n);
return p;
}
/* Allocate memory for N elements of S bytes, with error checking. */
VOID *
xcalloc (size_t n, size_t s)
{
VOID *p;
p = calloc (n, s);
if (p == 0)
p = fixup_null_alloc (n);
return p;
}
/* Change the size of an allocated block of memory P to N bytes,
with error checking.
If P is NULL, run xmalloc. */
VOID *
xrealloc (VOID *p, size_t n)
{
if (p == 0)
return xmalloc (n);
p = realloc (p, n);
if (p == 0)
p = fixup_null_alloc (n);
return p;
}
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