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9a35093c | 1 | /* xmalloc.c -- malloc with out of memory checking |
c9764fdb | 2 | Copyright (C) 1990, 1991, 1993 Free Software Foundation, Inc. |
9a35093c NW |
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 | |
16 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
17 | ||
c9764fdb NW |
18 | #ifdef HAVE_CONFIG_H |
19 | #if defined (CONFIG_BROKETS) | |
20 | /* We use <config.h> instead of "config.h" so that a compilation | |
21 | using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h | |
22 | (which it would do because it found this file in $srcdir). */ | |
23 | #include <config.h> | |
24 | #else | |
25 | #include "config.h" | |
26 | #endif | |
27 | #endif | |
28 | ||
29 | #if __STDC__ | |
30 | #define VOID void | |
31 | #else | |
32 | #define VOID char | |
33 | #endif | |
34 | ||
35 | #include <sys/types.h> | |
36 | ||
37 | #if STDC_HEADERS | |
9a35093c NW |
38 | #include <stdlib.h> |
39 | #else | |
c9764fdb NW |
40 | VOID *malloc (); |
41 | VOID *realloc (); | |
9a35093c NW |
42 | void free (); |
43 | #endif | |
44 | ||
c9764fdb NW |
45 | #if __STDC__ && defined (HAVE_VPRINTF) |
46 | void error (int, int, char const *, ...); | |
47 | #else | |
9a35093c | 48 | void error (); |
c9764fdb | 49 | #endif |
9a35093c NW |
50 | |
51 | /* Allocate N bytes of memory dynamically, with error checking. */ | |
52 | ||
c9764fdb | 53 | VOID * |
9a35093c | 54 | xmalloc (n) |
c9764fdb | 55 | size_t n; |
9a35093c | 56 | { |
c9764fdb | 57 | VOID *p; |
9a35093c NW |
58 | |
59 | p = malloc (n); | |
60 | if (p == 0) | |
61 | /* Must exit with 2 for `cmp'. */ | |
62 | error (2, 0, "virtual memory exhausted"); | |
63 | return p; | |
64 | } | |
65 | ||
66 | /* Change the size of an allocated block of memory P to N bytes, | |
67 | with error checking. | |
68 | If P is NULL, run xmalloc. | |
69 | If N is 0, run free and return NULL. */ | |
70 | ||
c9764fdb | 71 | VOID * |
9a35093c | 72 | xrealloc (p, n) |
c9764fdb NW |
73 | VOID *p; |
74 | size_t n; | |
9a35093c NW |
75 | { |
76 | if (p == 0) | |
77 | return xmalloc (n); | |
78 | if (n == 0) | |
79 | { | |
80 | free (p); | |
81 | return 0; | |
82 | } | |
83 | p = realloc (p, n); | |
84 | if (p == 0) | |
85 | /* Must exit with 2 for `cmp'. */ | |
86 | error (2, 0, "virtual memory exhausted"); | |
87 | return p; | |
88 | } |