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misc.c revision 1.1.1.2 
      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: head/usr.bin/sed/misc.c 200462 2009-12-13 03:14:06Z delphij $");
     36 
     37 #ifndef lint
     38 static 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  */
     58 char *
     59 strregerror(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 }
     72