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[findutils.git] / lib / xmalloc.c
blob8206a9473637cfb92b4c609f22163b6bf8202c76
1 /* xmalloc.c -- malloc with out of memory checking
2 Copyright (C) 1990-1997, 98, 99 Free Software Foundation, Inc.
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.
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.
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. */
18 #if HAVE_CONFIG_H
19 # include <config.h>
20 #endif
22 #include <sys/types.h>
24 #if STDC_HEADERS
25 # include <stdlib.h>
26 #else
27 void *calloc ();
28 void *malloc ();
29 void *realloc ();
30 void free ();
31 #endif
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
42 #include "error.h"
43 #include "xalloc.h"
45 #ifndef EXIT_FAILURE
46 # define EXIT_FAILURE 1
47 #endif
49 #ifndef HAVE_DONE_WORKING_MALLOC_CHECK
50 you must run the autoconf test for a properly working malloc -- see malloc.m4
51 #endif
53 #ifndef HAVE_DONE_WORKING_REALLOC_CHECK
54 you must run the autoconf test for a properly working realloc -- see realloc.m4
55 #endif
57 /* Exit value when the requested amount of memory is not available.
58 The caller may set it to some other value. */
59 int xalloc_exit_failure = EXIT_FAILURE;
61 /* If non NULL, call this function when memory is exhausted. */
62 void (*xalloc_fail_func) PARAMS ((void)) = 0;
64 /* If XALLOC_FAIL_FUNC is NULL, or does return, display this message
65 before exiting when memory is exhausted. Goes through gettext. */
66 char *const xalloc_msg_memory_exhausted = N_("Memory exhausted");
68 void
69 xalloc_die (void)
71 if (xalloc_fail_func)
72 (*xalloc_fail_func) ();
73 error (xalloc_exit_failure, 0, "%s", _(xalloc_msg_memory_exhausted));
74 /* The `noreturn' cannot be given to error, since it may return if
75 its first argument is 0. To help compilers understand the
76 xalloc_die does terminate, call exit. */
77 exit (EXIT_FAILURE);
80 /* Allocate N bytes of memory dynamically, with error checking. */
82 void *
83 xmalloc (size_t n)
85 void *p;
87 p = malloc (n);
88 if (p == 0)
89 xalloc_die ();
90 return p;
93 /* Change the size of an allocated block of memory P to N bytes,
94 with error checking.
95 If P is NULL, run xmalloc. */
97 void *
98 xrealloc (void *p, size_t n)
100 p = realloc (p, n);
101 if (p == 0)
102 xalloc_die ();
103 return p;
106 /* Allocate memory for N elements of S bytes, with error checking. */
108 void *
109 xcalloc (size_t n, size_t s)
111 void *p;
113 p = calloc (n, s);
114 if (p == 0)
115 xalloc_die ();
116 return p;