1*0b459c2cSDavid du Colombier /* xmalloc.c -- malloc with out of memory checking
2*0b459c2cSDavid du Colombier Copyright (C) 1990, 1991, 1993 Free Software Foundation, Inc.
3*0b459c2cSDavid du Colombier
4*0b459c2cSDavid du Colombier This program is free software; you can redistribute it and/or modify
5*0b459c2cSDavid du Colombier it under the terms of the GNU General Public License as published by
6*0b459c2cSDavid du Colombier the Free Software Foundation; either version 2, or (at your option)
7*0b459c2cSDavid du Colombier any later version.
8*0b459c2cSDavid du Colombier
9*0b459c2cSDavid du Colombier This program is distributed in the hope that it will be useful,
10*0b459c2cSDavid du Colombier but WITHOUT ANY WARRANTY; without even the implied warranty of
11*0b459c2cSDavid du Colombier MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12*0b459c2cSDavid du Colombier GNU General Public License for more details.
13*0b459c2cSDavid du Colombier
14*0b459c2cSDavid du Colombier You should have received a copy of the GNU General Public License
15*0b459c2cSDavid du Colombier along with this program; if not, write to the Free Software
16*0b459c2cSDavid du Colombier Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
17*0b459c2cSDavid du Colombier
18*0b459c2cSDavid du Colombier #ifdef HAVE_CONFIG_H
19*0b459c2cSDavid du Colombier #include <config.h>
20*0b459c2cSDavid du Colombier #endif
21*0b459c2cSDavid du Colombier
22*0b459c2cSDavid du Colombier #if __STDC__
23*0b459c2cSDavid du Colombier #define VOID void
24*0b459c2cSDavid du Colombier #else
25*0b459c2cSDavid du Colombier #define VOID char
26*0b459c2cSDavid du Colombier #endif
27*0b459c2cSDavid du Colombier
28*0b459c2cSDavid du Colombier #include <sys/types.h>
29*0b459c2cSDavid du Colombier
30*0b459c2cSDavid du Colombier #if STDC_HEADERS
31*0b459c2cSDavid du Colombier #include <stdlib.h>
32*0b459c2cSDavid du Colombier #else
33*0b459c2cSDavid du Colombier VOID *malloc ();
34*0b459c2cSDavid du Colombier VOID *realloc ();
35*0b459c2cSDavid du Colombier void free ();
36*0b459c2cSDavid du Colombier #endif
37*0b459c2cSDavid du Colombier
38*0b459c2cSDavid du Colombier #if __STDC__ && defined (HAVE_VPRINTF)
39*0b459c2cSDavid du Colombier void error (int, int, char const *, ...);
40*0b459c2cSDavid du Colombier #else
41*0b459c2cSDavid du Colombier void error ();
42*0b459c2cSDavid du Colombier #endif
43*0b459c2cSDavid du Colombier
44*0b459c2cSDavid du Colombier /* Allocate N bytes of memory dynamically, with error checking. */
45*0b459c2cSDavid du Colombier
46*0b459c2cSDavid du Colombier VOID *
xmalloc(n)47*0b459c2cSDavid du Colombier xmalloc (n)
48*0b459c2cSDavid du Colombier size_t n;
49*0b459c2cSDavid du Colombier {
50*0b459c2cSDavid du Colombier VOID *p;
51*0b459c2cSDavid du Colombier
52*0b459c2cSDavid du Colombier p = malloc (n);
53*0b459c2cSDavid du Colombier if (p == 0)
54*0b459c2cSDavid du Colombier /* Must exit with 2 for `cmp'. */
55*0b459c2cSDavid du Colombier error (2, 0, "memory exhausted");
56*0b459c2cSDavid du Colombier return p;
57*0b459c2cSDavid du Colombier }
58*0b459c2cSDavid du Colombier
59*0b459c2cSDavid du Colombier /* Change the size of an allocated block of memory P to N bytes,
60*0b459c2cSDavid du Colombier with error checking.
61*0b459c2cSDavid du Colombier If P is NULL, run xmalloc.
62*0b459c2cSDavid du Colombier If N is 0, run free and return NULL. */
63*0b459c2cSDavid du Colombier
64*0b459c2cSDavid du Colombier VOID *
xrealloc(p,n)65*0b459c2cSDavid du Colombier xrealloc (p, n)
66*0b459c2cSDavid du Colombier VOID *p;
67*0b459c2cSDavid du Colombier size_t n;
68*0b459c2cSDavid du Colombier {
69*0b459c2cSDavid du Colombier if (p == 0)
70*0b459c2cSDavid du Colombier return xmalloc (n);
71*0b459c2cSDavid du Colombier if (n == 0)
72*0b459c2cSDavid du Colombier {
73*0b459c2cSDavid du Colombier free (p);
74*0b459c2cSDavid du Colombier return 0;
75*0b459c2cSDavid du Colombier }
76*0b459c2cSDavid du Colombier p = realloc (p, n);
77*0b459c2cSDavid du Colombier if (p == 0)
78*0b459c2cSDavid du Colombier /* Must exit with 2 for `cmp'. */
79*0b459c2cSDavid du Colombier error (2, 0, "memory exhausted");
80*0b459c2cSDavid du Colombier return p;
81*0b459c2cSDavid du Colombier }
82