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      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 *
     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 *
     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 *
     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 *
    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