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misc.c revision 1.14 
      1 /*	$NetBSD: misc.c,v 1.14 2014/06/06 21:56:39 wiz 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 1.14 2014/06/06 21:56:39 wiz 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 #include <sys/types.h>
     47 
     48 #include <err.h>
     49 #include <limits.h>
     50 #include <regex.h>
     51 #include <stdio.h>
     52 #include <stdlib.h>
     53 #include <string.h>
     54 
     55 #include "defs.h"
     56 #include "extern.h"
     57 
     58 /*
     59  * malloc with result test
     60  */
     61 void *
     62 xmalloc(size_t size)
     63 {
     64 	void *p;
     65 
     66 	if ((p = malloc(size)) == NULL)
     67 		err(1, "malloc(%zu)", size);
     68 	return p;
     69 }
     70 
     71 /*
     72  * realloc with result test
     73  */
     74 void *
     75 xrealloc(void *p, size_t size)
     76 {
     77 	if (p == NULL)			/* Compatibility hack. */
     78 		return (xmalloc(size));
     79 
     80 	if ((p = realloc(p, size)) == NULL)
     81 		err(1, "realloc(%zu)", size);
     82 	return p;
     83 }
     84 
     85 /*
     86  * realloc with result test
     87  */
     88 void *
     89 xcalloc(size_t c, size_t n)
     90 {
     91 	void *p;
     92 
     93 	if ((p = calloc(c, n)) == NULL)
     94 		err(1, "calloc(%zu, %zu)", c, n);
     95 	return p;
     96 }
     97 /*
     98  * Return a string for a regular expression error passed.  This is overkill,
     99  * because of the silly semantics of regerror (we can never know the size of
    100  * the buffer).
    101  */
    102 char *
    103 strregerror(int errcode, regex_t *preg)
    104 {
    105 	char buf[1];
    106 	static char *oe;
    107 	size_t s;
    108 
    109 	if (oe != NULL)
    110 		free(oe);
    111 	s = regerror(errcode, preg, buf, 0);
    112 	oe = xmalloc(s);
    113 	(void)regerror(errcode, preg, oe, s);
    114 	return (oe);
    115 }
    116