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misc.c revision 1.5 
      1 /*	$NetBSD: misc.c,v 1.5 1997/01/09 20:21:31 tls 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 #ifndef lint
     41 /* from: static char sccsid[] = "@(#)misc.c	8.1 (Berkeley) 6/6/93"; */
     42 static char *rcsid = "$NetBSD: misc.c,v 1.5 1997/01/09 20:21:31 tls Exp $";
     43 #endif /* not lint */
     44 
     45 #include <sys/types.h>
     46 
     47 #include <errno.h>
     48 #include <regex.h>
     49 #include <stdio.h>
     50 #include <stdlib.h>
     51 #include <string.h>
     52 
     53 #include "defs.h"
     54 #include "extern.h"
     55 
     56 /*
     57  * malloc with result test
     58  */
     59 void *
     60 xmalloc(size)
     61 	u_int size;
     62 {
     63 	void *p;
     64 
     65 	if ((p = malloc(size)) == NULL)
     66 		err(FATAL, "%s", strerror(errno));
     67 	return (p);
     68 }
     69 
     70 /*
     71  * realloc with result test
     72  */
     73 void *
     74 xrealloc(p, size)
     75 	void *p;
     76 	u_int size;
     77 {
     78 	if (p == NULL)			/* Compatibility hack. */
     79 		return (xmalloc(size));
     80 
     81 	if ((p = realloc(p, size)) == NULL)
     82 		err(FATAL, "%s", strerror(errno));
     83 	return (p);
     84 }
     85 
     86 /*
     87  * Return a string for a regular expression error passed.  This is a overkill,
     88  * because of the silly semantics of regerror (we can never know the size of
     89  * the buffer).
     90  */
     91 char *
     92 strregerror(errcode, preg)
     93 	int errcode;
     94 	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 #if __STDC__
    108 #include <stdarg.h>
    109 #else
    110 #include <varargs.h>
    111 #endif
    112 /*
    113  * Error reporting function
    114  */
    115 void
    116 #if __STDC__
    117 err(int severity, const char *fmt, ...)
    118 #else
    119 err(severity, fmt, va_alist)
    120 	int severity;
    121 	char *fmt;
    122         va_dcl
    123 #endif
    124 {
    125 	va_list ap;
    126 #if __STDC__
    127 	va_start(ap, fmt);
    128 #else
    129 	va_start(ap);
    130 #endif
    131 	(void)fprintf(stderr, "sed: ");
    132 	switch (severity) {
    133 	case WARNING:
    134 	case COMPILE:
    135 		(void)fprintf(stderr, "%lu: %s: ", linenum, fname);
    136 	}
    137 	(void)vfprintf(stderr, fmt, ap);
    138 	va_end(ap);
    139 	(void)fprintf(stderr, "\n");
    140 	if (severity == WARNING)
    141 		return;
    142 	exit(1);
    143 	/* NOTREACHED */
    144 }
    145