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misc.c revision 1.6 
      1 /*	$NetBSD: misc.c,v 1.6 1997/10/19 23:05:15 lukem 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 1.6 1997/10/19 23:05:15 lukem Exp $");
     46 #endif
     47 #endif /* not lint */
     48 
     49 #include <sys/types.h>
     50 
     51 #include <errno.h>
     52 #include <regex.h>
     53 #include <stdio.h>
     54 #include <stdlib.h>
     55 #include <string.h>
     56 
     57 #include "defs.h"
     58 #include "extern.h"
     59 
     60 /*
     61  * malloc with result test
     62  */
     63 void *
     64 xmalloc(size)
     65 	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(p, size)
     79 	void *p;
     80 	u_int size;
     81 {
     82 	if (p == NULL)			/* Compatibility hack. */
     83 		return (xmalloc(size));
     84 
     85 	if ((p = realloc(p, size)) == NULL)
     86 		err(FATAL, "%s", strerror(errno));
     87 	return (p);
     88 }
     89 
     90 /*
     91  * Return a string for a regular expression error passed.  This is a overkill,
     92  * because of the silly semantics of regerror (we can never know the size of
     93  * the buffer).
     94  */
     95 char *
     96 strregerror(errcode, preg)
     97 	int errcode;
     98 	regex_t *preg;
     99 {
    100 	static char *oe;
    101 	size_t s;
    102 
    103 	if (oe != NULL)
    104 		free(oe);
    105 	s = regerror(errcode, preg, "", 0);
    106 	oe = xmalloc(s);
    107 	(void)regerror(errcode, preg, oe, s);
    108 	return (oe);
    109 }
    110 
    111 #if __STDC__
    112 #include <stdarg.h>
    113 #else
    114 #include <varargs.h>
    115 #endif
    116 /*
    117  * Error reporting function
    118  */
    119 void
    120 #if __STDC__
    121 err(int severity, const char *fmt, ...)
    122 #else
    123 err(severity, fmt, va_alist)
    124 	int severity;
    125 	char *fmt;
    126         va_dcl
    127 #endif
    128 {
    129 	va_list ap;
    130 #if __STDC__
    131 	va_start(ap, fmt);
    132 #else
    133 	va_start(ap);
    134 #endif
    135 	(void)fprintf(stderr, "sed: ");
    136 	switch (severity) {
    137 	case WARNING:
    138 	case COMPILE:
    139 		(void)fprintf(stderr, "%lu: %s: ", linenum, fname);
    140 	}
    141 	(void)vfprintf(stderr, fmt, ap);
    142 	va_end(ap);
    143 	(void)fprintf(stderr, "\n");
    144 	if (severity == WARNING)
    145 		return;
    146 	exit(1);
    147 	/* NOTREACHED */
    148 }
    149