/usr.bin/sed/misc.c

 1/*-
 2 * Copyright (c) 1992 Diomidis Spinellis.
 3 * Copyright (c) 1992, 1993
 4 *	The Regents of the University of California.  All rights reserved.
 5 *
 6 * This code is derived from software contributed to Berkeley by
 7 * Diomidis Spinellis of Imperial College, University of London.
 8 *
 9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD$");
36
37#ifndef lint
38static const char sccsid[] = "@(#)misc.c	8.1 (Berkeley) 6/6/93";
39#endif
40
41#include <sys/types.h>
42
43#include <err.h>
44#include <limits.h>
45#include <regex.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49
50#include "defs.h"
51#include "extern.h"
52
53/*
54 * Return a string for a regular expression error passed.  This is overkill,
55 * because of the silly semantics of regerror (we can never know the size of
56 * the buffer).
57 */
58char *
59strregerror(int errcode, regex_t *preg)
60{
61	static char *oe;
62	size_t s;
63
64	if (oe != NULL)
65		free(oe);
66	s = regerror(errcode, preg, NULL, 0);
67	if ((oe = malloc(s)) == NULL)
68		err(1, "malloc");
69	(void)regerror(errcode, preg, oe, s);
70	return (oe);
71}