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misc.c revision 1.7 
      1 /*	$NetBSD: misc.c,v 1.7 2002/06/14 00:41:42 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. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the University of
     22  *	California, Berkeley and its contributors.
     23  * 4. Neither the name of the University nor the names of its contributors
     24  *    may be used to endorse or promote products derived from this software
     25  *    without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     37  * SUCH DAMAGE.
     38  */
     39 
     40 #include <sys/cdefs.h>
     41 #ifndef lint
     42 #if 0
     43 static char sccsid[] = "@(#)misc.c	8.1 (Berkeley) 6/6/93";
     44 #else
     45 __RCSID("$NetBSD: misc.c,v 1.7 2002/06/14 00:41:42 wiz Exp $");
     46 #endif
     47 #endif /* not lint */
     48 
     49 #include <sys/types.h>
     50 
     51 #include <errno.h>
     52 #include <regex.h>
     53 #include <stdarg.h>
     54 #include <stdio.h>
     55 #include <stdlib.h>
     56 #include <string.h>
     57 
     58 #include "defs.h"
     59 #include "extern.h"
     60 
     61 /*
     62  * malloc with result test
     63  */
     64 void *
     65 xmalloc(u_int size)
     66 {
     67 	void *p;
     68 
     69 	if ((p = malloc(size)) == NULL)
     70 		err(FATAL, "%s", strerror(errno));
     71 	return (p);
     72 }
     73 
     74 /*
     75  * realloc with result test
     76  */
     77 void *
     78 xrealloc(void *p, u_int size)
     79 {
     80 	if (p == NULL)			/* Compatibility hack. */
     81 		return (xmalloc(size));
     82 
     83 	if ((p = realloc(p, size)) == NULL)
     84 		err(FATAL, "%s", strerror(errno));
     85 	return (p);
     86 }
     87 
     88 /*
     89  * Return a string for a regular expression error passed.  This is a overkill,
     90  * because of the silly semantics of regerror (we can never know the size of
     91  * the buffer).
     92  */
     93 char *
     94 strregerror(int errcode, regex_t *preg)
     95 {
     96 	static char *oe;
     97 	size_t s;
     98 
     99 	if (oe != NULL)
    100 		free(oe);
    101 	s = regerror(errcode, preg, "", 0);
    102 	oe = xmalloc(s);
    103 	(void)regerror(errcode, preg, oe, s);
    104 	return (oe);
    105 }
    106 
    107 /*
    108  * Error reporting function
    109  */
    110 void
    111 err(int severity, const char *fmt, ...)
    112 {
    113 	va_list ap;
    114 
    115 	va_start(ap, fmt);
    116 	(void)fprintf(stderr, "sed: ");
    117 	switch (severity) {
    118 	case WARNING:
    119 	case COMPILE:
    120 		(void)fprintf(stderr, "%lu: %s: ", linenum, fname);
    121 	}
    122 	(void)vfprintf(stderr, fmt, ap);
    123 	va_end(ap);
    124 	(void)fprintf(stderr, "\n");
    125 	if (severity == WARNING)
    126 		return;
    127 	exit(1);
    128 	/* NOTREACHED */
    129 }
    130