1 /* $NetBSD: misc.c,v 1.15 2014/06/26 02:14:32 christos Exp $ */
2
3 /*-
4 * Copyright (c) 1992 Diomidis Spinellis.
5 * Copyright (c) 1992, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Diomidis Spinellis of Imperial College, University of London.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #if HAVE_NBTOOL_CONFIG_H
37 #include "nbtool_config.h"
38 #endif
39
40 #include <sys/cdefs.h>
41 __RCSID("$NetBSD: misc.c,v 1.15 2014/06/26 02:14:32 christos Exp $");
42 #ifdef __FBSDID
43 __FBSDID("$FreeBSD: head/usr.bin/sed/misc.c 200462 2009-12-13 03:14:06Z delphij $");
44 #endif
45
46 #if 0
47 static const char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 6/6/93";
48 #endif
49
50 #include <sys/types.h>
51
52 #include <err.h>
53 #include <limits.h>
54 #include <regex.h>
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <string.h>
58
59 #include "defs.h"
60 #include "extern.h"
61
62 /*
63 * malloc with result test
64 */
65 void *
xmalloc(size_t size)66 xmalloc(size_t size)
67 {
68 void *p;
69
70 if ((p = malloc(size)) == NULL)
71 err(1, "malloc(%zu)", size);
72 return p;
73 }
74
75 /*
76 * realloc with result test
77 */
78 void *
xrealloc(void * p,size_t size)79 xrealloc(void *p, size_t size)
80 {
81 if (p == NULL) /* Compatibility hack. */
82 return (xmalloc(size));
83
84 if ((p = realloc(p, size)) == NULL)
85 err(1, "realloc(%zu)", size);
86 return p;
87 }
88
89 /*
90 * realloc with result test
91 */
92 void *
xcalloc(size_t c,size_t n)93 xcalloc(size_t c, size_t n)
94 {
95 void *p;
96
97 if ((p = calloc(c, n)) == NULL)
98 err(1, "calloc(%zu, %zu)", c, n);
99 return p;
100 }
101 /*
102 * Return a string for a regular expression error passed. This is overkill,
103 * because of the silly semantics of regerror (we can never know the size of
104 * the buffer).
105 */
106 char *
strregerror(int errcode,regex_t * preg)107 strregerror(int errcode, regex_t *preg)
108 {
109 char buf[1];
110 static char *oe;
111 size_t s;
112
113 if (oe != NULL)
114 free(oe);
115 s = regerror(errcode, preg, buf, 0);
116 oe = xmalloc(s);
117 (void)regerror(errcode, preg, oe, s);
118 return (oe);
119 }
120