/* xmalloc.c -- malloc with out of memory checking
Copyright (C) 1990-1996, 2000-2003, 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/* Specification. */
#include "xalloc.h"
#include <stdlib.h>
#include "error.h"
#include "exit.h"
#include "gettext.h"
#define _(str) gettext (str)
/* 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;
void
xalloc_die ()
{
error (xmalloc_exit_failure, 0, _("memory exhausted"));
/* The `noreturn' cannot be given to error, since it may return if
its first argument is 0. To help compilers understand the
xalloc_die does terminate, call exit. */
exit (EXIT_FAILURE);
}
static void *
fixup_null_alloc (size_t n)
{
void *p;
p = 0;
if (n == 0)
p = malloc ((size_t) 1);
if (p == NULL)
xalloc_die ();
return p;
}
/* Allocate N bytes of memory dynamically, with error checking. */
void *
xmalloc (size_t n)
{
void *p;
p = malloc (n);
if (p == NULL)
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 == NULL)
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 == NULL)
return xmalloc (n);
p = realloc (p, n);
if (p == NULL)
p = fixup_null_alloc (n);
return p;
}
