2015-05-28 Wilco Dijkstra <wdijkstr@arm.com>
[glibc.git] / locale / programs / xmalloc.c
blob36bc17fe89ce179b780203c2df1c9f91fde700aa
1 /* xmalloc.c -- malloc with out of memory checking
2 Copyright (C) 1990-2015 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, see <http://www.gnu.org/licenses/>. */
18 #ifdef HAVE_CONFIG_H
19 #include <config.h>
20 #endif
22 #define VOID void
24 #include <sys/types.h>
26 #if STDC_HEADERS || _LIBC
27 #include <stdlib.h>
28 static VOID *fixup_null_alloc (size_t n) __THROW;
29 VOID *xmalloc (size_t n) __THROW;
30 VOID *xcalloc (size_t n, size_t s) __THROW;
31 VOID *xrealloc (VOID *p, size_t n) __THROW;
32 #else
33 VOID *calloc ();
34 VOID *malloc ();
35 VOID *realloc ();
36 void free ();
37 #endif
39 #include <libintl.h>
40 #include "error.h"
42 #ifndef _
43 # define _(str) gettext (str)
44 #endif
46 #ifndef EXIT_FAILURE
47 #define EXIT_FAILURE 4
48 #endif
50 /* Exit value when the requested amount of memory is not available.
51 The caller may set it to some other value. */
52 int xmalloc_exit_failure = EXIT_FAILURE;
54 static VOID *
55 fixup_null_alloc (n)
56 size_t n;
58 VOID *p;
60 p = 0;
61 if (n == 0)
62 p = malloc ((size_t) 1);
63 if (p == 0)
64 error (xmalloc_exit_failure, 0, _("memory exhausted"));
65 return p;
68 /* Allocate N bytes of memory dynamically, with error checking. */
70 VOID *
71 xmalloc (n)
72 size_t n;
74 VOID *p;
76 p = malloc (n);
77 if (p == 0)
78 p = fixup_null_alloc (n);
79 return p;
82 /* Allocate memory for N elements of S bytes, with error checking. */
84 VOID *
85 xcalloc (n, s)
86 size_t n, s;
88 VOID *p;
90 p = calloc (n, s);
91 if (p == 0)
92 p = fixup_null_alloc (n);
93 return p;
96 /* Change the size of an allocated block of memory P to N bytes,
97 with error checking.
98 If P is NULL, run xmalloc. */
100 VOID *
101 xrealloc (p, n)
102 VOID *p;
103 size_t n;
105 if (p == 0)
106 return xmalloc (n);
107 p = realloc (p, n);
108 if (p == 0)
109 p = fixup_null_alloc (n);
110 return p;