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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#include "gettext.h"
34#define _(msgid) gettext (msgid)
35#define N_(msgid) msgid
36
37#include "error.h"
38#include "xalloc.h"
39
40#ifndef EXIT_FAILURE
41# define EXIT_FAILURE 1
42#endif
43
44/* The following tests require AC_PREREQ(2.54). */
45
46#ifndef HAVE_MALLOC
47"you must run the autoconf test for a GNU libc compatible malloc"
48#endif
49
50#ifndef HAVE_REALLOC
51"you must run the autoconf test for a GNU libc compatible realloc"
52#endif
53
54/* Exit value when the requested amount of memory is not available.
55 The caller may set it to some other value. */
56int xalloc_exit_failure = EXIT_FAILURE;
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 (xalloc_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}