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0393dfd6 | 1 | /* xmalloc.c -- malloc with out of memory checking |
b168057a | 2 | Copyright (C) 1990-2015 Free Software Foundation, Inc. |
478b92f0 | 3 | This file is part of the GNU C Library. |
0393dfd6 | 4 | |
43bc8ac6 | 5 | This program is free software; you can redistribute it and/or modify |
2e2efe65 RM |
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. | |
0393dfd6 | 9 | |
43bc8ac6 | 10 | This program is distributed in the hope that it will be useful, |
0393dfd6 | 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
43bc8ac6 UD |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | GNU General Public License for more details. | |
0393dfd6 | 14 | |
43bc8ac6 | 15 | You should have received a copy of the GNU General Public License |
59ba27a6 | 16 | along with this program; if not, see <http://www.gnu.org/licenses/>. */ |
0393dfd6 RM |
17 | |
18 | #ifdef HAVE_CONFIG_H | |
19 | #include <config.h> | |
20 | #endif | |
21 | ||
0393dfd6 | 22 | #define VOID void |
0393dfd6 RM |
23 | |
24 | #include <sys/types.h> | |
25 | ||
26 | #if STDC_HEADERS || _LIBC | |
27 | #include <stdlib.h> | |
79937577 UD |
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; | |
0393dfd6 RM |
32 | #else |
33 | VOID *calloc (); | |
34 | VOID *malloc (); | |
35 | VOID *realloc (); | |
36 | void free (); | |
37 | #endif | |
38 | ||
39 | #include <libintl.h> | |
40 | #include "error.h" | |
41 | ||
42 | #ifndef _ | |
43 | # define _(str) gettext (str) | |
44 | #endif | |
45 | ||
46 | #ifndef EXIT_FAILURE | |
47 | #define EXIT_FAILURE 4 | |
48 | #endif | |
49 | ||
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; | |
53 | ||
54 | static VOID * | |
55 | fixup_null_alloc (n) | |
56 | size_t n; | |
57 | { | |
58 | VOID *p; | |
59 | ||
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; | |
66 | } | |
67 | ||
68 | /* Allocate N bytes of memory dynamically, with error checking. */ | |
69 | ||
70 | VOID * | |
71 | xmalloc (n) | |
72 | size_t n; | |
73 | { | |
74 | VOID *p; | |
75 | ||
76 | p = malloc (n); | |
77 | if (p == 0) | |
78 | p = fixup_null_alloc (n); | |
79 | return p; | |
80 | } | |
81 | ||
82 | /* Allocate memory for N elements of S bytes, with error checking. */ | |
83 | ||
84 | VOID * | |
85 | xcalloc (n, s) | |
86 | size_t n, s; | |
87 | { | |
88 | VOID *p; | |
89 | ||
90 | p = calloc (n, s); | |
91 | if (p == 0) | |
92 | p = fixup_null_alloc (n); | |
93 | return p; | |
94 | } | |
95 | ||
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. */ | |
99 | ||
100 | VOID * | |
101 | xrealloc (p, n) | |
102 | VOID *p; | |
103 | size_t n; | |
104 | { | |
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; | |
111 | } |