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