1/* xmalloc.c -- malloc with out of memory checking
2   Copyright (C) 1990-1999, 2000, 2002 Free Software Foundation, Inc.
3
4   This program is free software; you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 2, or (at your option)
7   any later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program; if not, write to the Free Software Foundation,
16   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
17
18#if HAVE_CONFIG_H
19# include <config.h>
20#endif
21
22#include <sys/types.h>
23
24#if STDC_HEADERS
25# include <stdlib.h>
26#else
27void *calloc ();
28void *malloc ();
29void *realloc ();
30void free ();
31#endif
32
33#if ENABLE_NLS
34# include <libintl.h>
35# define _(Text) gettext (Text)
36#else
37# define textdomain(Domain)
38# define _(Text) Text
39#endif
40#define N_(Text) Text
41
42#include "error.h"
43#include "exitfail.h"
44#include "xalloc.h"
45
46#ifndef EXIT_FAILURE
47# define EXIT_FAILURE 1
48#endif
49
50#ifndef HAVE_DONE_WORKING_MALLOC_CHECK
51"you must run the autoconf test for a properly working malloc -- see malloc.m4"
52#endif
53
54#ifndef HAVE_DONE_WORKING_REALLOC_CHECK
55"you must run the autoconf test for a properly working realloc --see realloc.m4"
56#endif
57
58/* If non NULL, call this function when memory is exhausted. */
59void (*xalloc_fail_func) PARAMS ((void)) = 0;
60
61/* If XALLOC_FAIL_FUNC is NULL, or does return, display this message
62   before exiting when memory is exhausted.  Goes through gettext. */
63char const xalloc_msg_memory_exhausted[] = N_("memory exhausted");
64
65void
66xalloc_die (void)
67{
68  if (xalloc_fail_func)
69    (*xalloc_fail_func) ();
70  error (exit_failure, 0, "%s", _(xalloc_msg_memory_exhausted));
71  /* The `noreturn' cannot be given to error, since it may return if
72     its first argument is 0.  To help compilers understand the
73     xalloc_die does terminate, call exit. */
74  exit (EXIT_FAILURE);
75}
76
77/* Allocate N bytes of memory dynamically, with error checking.  */
78
79void *
80xmalloc (size_t n)
81{
82  void *p;
83
84  p = malloc (n);
85  if (p == 0)
86    xalloc_die ();
87  return p;
88}
89
90/* Change the size of an allocated block of memory P to N bytes,
91   with error checking.  */
92
93void *
94xrealloc (void *p, size_t n)
95{
96  p = realloc (p, n);
97  if (p == 0)
98    xalloc_die ();
99  return p;
100}
101
102/* Allocate memory for N elements of S bytes, with error checking.  */
103
104void *
105xcalloc (size_t n, size_t s)
106{
107  void *p;
108
109  p = calloc (n, s);
110  if (p == 0)
111    xalloc_die ();
112  return p;
113}
114