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1/* $OpenBSD: misc.c,v 1.13 2024/07/17 20:57:16 millert 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#include <sys/types.h>
37
38#include <err.h>
39#include <regex.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <stdarg.h>
44
45#include "defs.h"
46#include "extern.h"
47
48/*
49 * malloc with result test
50 */
51void *
52xmalloc(size_t size)
53{
54 void *p;
55
56 if ((p = malloc(size)) == NULL)
57 err(1, NULL);
58 return (p);
59}
60
61void *
62xreallocarray(void *o, size_t nmemb, size_t size)
63{
64 void *p;
65
66 if ((p = reallocarray(o, nmemb, size)) == NULL)
67 err(1, NULL);
68 return (p);
69}
70
71/*
72 * realloc with result test
73 */
74void *
75xrealloc(void *p, size_t size)
76{
77
78 if ((p = realloc(p, size)) == NULL)
79 err(1, NULL);
80 return (p);
81}
82
83/*
84 * Return a string for a regular expression error passed. This is a overkill,
85 * because of the silly semantics of regerror (we can never know the size of
86 * the buffer).
87 */
88char *
89strregerror(int errcode, regex_t *preg)
90{
91 static char *oe;
92 size_t s;
93
94 free(oe);
95 s = regerror(errcode, preg, "", 0);
96 oe = xmalloc(s);
97 (void)regerror(errcode, preg, oe, s);
98 return (oe);
99}
100
101/*
102 * Error reporting function
103 */
104__dead void
105error(const char *fmt, ...)
106{
107 va_list ap;
108
109 (void)fprintf(stderr, "sed: %lu: %s: ", linenum, fname);
110 va_start(ap, fmt);
111 (void)vfprintf(stderr, fmt, ap);
112 va_end(ap);
113 (void)fprintf(stderr, "\n");
114 exit(1);
115}
116
117void
118warning(const char *fmt, ...)
119{
120 va_list ap;
121
122 (void)fprintf(stderr, "sed: %lu: %s: ", linenum, fname);
123 va_start(ap, fmt);
124 (void)vfprintf(stderr, fmt, ap);
125 va_end(ap);
126 (void)fprintf(stderr, "\n");
127}