1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /* Copyright (c) 1988 AT&T */
23 /* All Rights Reserved */
24
25
26 /*
27 * Copyright (c) 1999 by Sun Microsystems, Inc.
28 * All rights reserved.
29 */
30
31 #pragma ident "%Z%%M% %I% %E% SMI"
32
33 /* memory allocation functions */
34
35 #include <stdio.h>
36 #include <string.h>
37 #include <stdlib.h>
38
39 extern char *argv0; /* command name (must be set in main function) */
40
41 char *stralloc(char *s);
42 void *mymalloc(size_t size);
43 void *mycalloc(size_t nelem, size_t size);
44 void *myrealloc(void *p, size_t size);
45 static void *alloctest(void *p);
46
47 /* allocate a string */
48
49 char *
stralloc(char * s)50 stralloc(char *s)
51 {
52 return (strcpy(mymalloc(strlen(s) + 1), s));
53 }
54
55 /* version of malloc that only returns if successful */
56
57 void *
mymalloc(size_t size)58 mymalloc(size_t size)
59 {
60 return (alloctest(malloc(size)));
61 }
62
63 /* version of calloc that only returns if successful */
64
65 void *
mycalloc(size_t nelem,size_t size)66 mycalloc(size_t nelem, size_t size)
67 {
68 return (alloctest(calloc(nelem, size)));
69 }
70
71 /* version of realloc that only returns if successful */
72
73 void *
myrealloc(void * p,size_t size)74 myrealloc(void *p, size_t size)
75 {
76 return (alloctest(realloc(p, size)));
77 }
78
79 /* check for memory allocation failure */
80
81 static void *
alloctest(void * p)82 alloctest(void *p)
83 {
84 if (p == NULL) {
85 (void) fprintf(stderr, "\n%s: out of storage\n", argv0);
86 exit(1);
87 }
88 return (p);
89 }
90