xref: /freebsd/usr.bin/sed/misc.c (revision 73a08bb2ad8227db762a9b9336a2c8f5cab485ec)
19b50d902SRodney W. Grimes /*-
29b50d902SRodney W. Grimes  * Copyright (c) 1992 Diomidis Spinellis.
39b50d902SRodney W. Grimes  * Copyright (c) 1992, 1993
49b50d902SRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
59b50d902SRodney W. Grimes  *
69b50d902SRodney W. Grimes  * This code is derived from software contributed to Berkeley by
79b50d902SRodney W. Grimes  * Diomidis Spinellis of Imperial College, University of London.
89b50d902SRodney W. Grimes  *
99b50d902SRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
109b50d902SRodney W. Grimes  * modification, are permitted provided that the following conditions
119b50d902SRodney W. Grimes  * are met:
129b50d902SRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
139b50d902SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
149b50d902SRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
159b50d902SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
169b50d902SRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
179b50d902SRodney W. Grimes  * 3. All advertising materials mentioning features or use of this software
189b50d902SRodney W. Grimes  *    must display the following acknowledgement:
199b50d902SRodney W. Grimes  *	This product includes software developed by the University of
209b50d902SRodney W. Grimes  *	California, Berkeley and its contributors.
219b50d902SRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
229b50d902SRodney W. Grimes  *    may be used to endorse or promote products derived from this software
239b50d902SRodney W. Grimes  *    without specific prior written permission.
249b50d902SRodney W. Grimes  *
259b50d902SRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
269b50d902SRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
279b50d902SRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
289b50d902SRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
299b50d902SRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
309b50d902SRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
319b50d902SRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
329b50d902SRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
339b50d902SRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
349b50d902SRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
359b50d902SRodney W. Grimes  * SUCH DAMAGE.
369b50d902SRodney W. Grimes  */
379b50d902SRodney W. Grimes 
389b50d902SRodney W. Grimes #ifndef lint
3973a08bb2SPhilippe Charnier #if 0
409b50d902SRodney W. Grimes static char sccsid[] = "@(#)misc.c	8.1 (Berkeley) 6/6/93";
4173a08bb2SPhilippe Charnier #endif
4273a08bb2SPhilippe Charnier static const char rcsid[] =
4373a08bb2SPhilippe Charnier 	"$Id$";
449b50d902SRodney W. Grimes #endif /* not lint */
459b50d902SRodney W. Grimes 
469b50d902SRodney W. Grimes #include <sys/types.h>
479b50d902SRodney W. Grimes 
4873a08bb2SPhilippe Charnier #include <err.h>
499b50d902SRodney W. Grimes #include <regex.h>
509b50d902SRodney W. Grimes #include <stdio.h>
519b50d902SRodney W. Grimes #include <stdlib.h>
529b50d902SRodney W. Grimes #include <string.h>
539b50d902SRodney W. Grimes 
549b50d902SRodney W. Grimes #include "defs.h"
559b50d902SRodney W. Grimes #include "extern.h"
569b50d902SRodney W. Grimes 
579b50d902SRodney W. Grimes /*
589b50d902SRodney W. Grimes  * malloc with result test
599b50d902SRodney W. Grimes  */
609b50d902SRodney W. Grimes void *
619b50d902SRodney W. Grimes xmalloc(size)
629b50d902SRodney W. Grimes 	u_int size;
639b50d902SRodney W. Grimes {
649b50d902SRodney W. Grimes 	void *p;
659b50d902SRodney W. Grimes 
669b50d902SRodney W. Grimes 	if ((p = malloc(size)) == NULL)
6773a08bb2SPhilippe Charnier 		err(1, "malloc");
689b50d902SRodney W. Grimes 	return (p);
699b50d902SRodney W. Grimes }
709b50d902SRodney W. Grimes 
719b50d902SRodney W. Grimes /*
729b50d902SRodney W. Grimes  * realloc with result test
739b50d902SRodney W. Grimes  */
749b50d902SRodney W. Grimes void *
759b50d902SRodney W. Grimes xrealloc(p, size)
769b50d902SRodney W. Grimes 	void *p;
779b50d902SRodney W. Grimes 	u_int size;
789b50d902SRodney W. Grimes {
799b50d902SRodney W. Grimes 	if (p == NULL)			/* Compatibility hack. */
809b50d902SRodney W. Grimes 		return (xmalloc(size));
819b50d902SRodney W. Grimes 
829b50d902SRodney W. Grimes 	if ((p = realloc(p, size)) == NULL)
8373a08bb2SPhilippe Charnier 		err(1, "realloc");
849b50d902SRodney W. Grimes 	return (p);
859b50d902SRodney W. Grimes }
869b50d902SRodney W. Grimes 
879b50d902SRodney W. Grimes /*
889b50d902SRodney W. Grimes  * Return a string for a regular expression error passed.  This is a overkill,
899b50d902SRodney W. Grimes  * because of the silly semantics of regerror (we can never know the size of
909b50d902SRodney W. Grimes  * the buffer).
919b50d902SRodney W. Grimes  */
929b50d902SRodney W. Grimes char *
939b50d902SRodney W. Grimes strregerror(errcode, preg)
949b50d902SRodney W. Grimes 	int errcode;
959b50d902SRodney W. Grimes 	regex_t *preg;
969b50d902SRodney W. Grimes {
979b50d902SRodney W. Grimes 	static char *oe;
989b50d902SRodney W. Grimes 	size_t s;
999b50d902SRodney W. Grimes 
1009b50d902SRodney W. Grimes 	if (oe != NULL)
1019b50d902SRodney W. Grimes 		free(oe);
1029b50d902SRodney W. Grimes 	s = regerror(errcode, preg, "", 0);
1039b50d902SRodney W. Grimes 	oe = xmalloc(s);
1049b50d902SRodney W. Grimes 	(void)regerror(errcode, preg, oe, s);
1059b50d902SRodney W. Grimes 	return (oe);
1069b50d902SRodney W. Grimes }
107