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misc.c revision 1.1 
      1 /*-
      2  * Copyright (c) 1992 Diomidis Spinellis.
      3  * Copyright (c) 1992 The Regents of the University of California.
      4  * All rights reserved.
      5  *
      6  * This code is derived from software contributed to Berkeley by
      7  * Diomidis Spinellis of Imperial College, University of London.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed by the University of
     20  *	California, Berkeley and its contributors.
     21  * 4. Neither the name of the University nor the names of its contributors
     22  *    may be used to endorse or promote products derived from this software
     23  *    without specific prior written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  * SUCH DAMAGE.
     36  */
     37 
     38 #ifndef lint
     39 static char sccsid[] = "@(#)misc.c	5.3 (Berkeley) 8/26/92";
     40 #endif /* not lint */
     41 
     42 #include <sys/types.h>
     43 
     44 #include <errno.h>
     45 #include <regex.h>
     46 #include <stdio.h>
     47 #include <stdlib.h>
     48 #include <string.h>
     49 
     50 #include "defs.h"
     51 #include "extern.h"
     52 
     53 /*
     54  * malloc with result test
     55  */
     56 void *
     57 xmalloc(size)
     58 	u_int size;
     59 {
     60 	void *p;
     61 
     62 	if ((p = malloc(size)) == NULL)
     63 		err(FATAL, "%s", strerror(errno));
     64 	return (p);
     65 }
     66 
     67 /*
     68  * realloc with result test
     69  */
     70 void *
     71 xrealloc(p, size)
     72 	void *p;
     73 	u_int size;
     74 {
     75 	if (p == NULL)			/* Compatibility hack. */
     76 		return (xmalloc(size));
     77 
     78 	if ((p = realloc(p, size)) == NULL)
     79 		err(FATAL, "%s", strerror(errno));
     80 	return (p);
     81 }
     82 
     83 /*
     84  * Return a string for a regular expression error passed.  This is a overkill,
     85  * because of the silly semantics of regerror (we can never know the size of
     86  * the buffer).
     87  */
     88 char *
     89 strregerror(errcode, preg)
     90 	int errcode;
     91 	regex_t *preg;
     92 {
     93 	static char *oe;
     94 	size_t s;
     95 
     96 	if (oe != NULL)
     97 		free(oe);
     98 	s = regerror(errcode, preg, "", 0);
     99 	oe = xmalloc(s);
    100 	(void)regerror(errcode, preg, oe, s);
    101 	return (oe);
    102 }
    103 
    104 #if __STDC__
    105 #include <stdarg.h>
    106 #else
    107 #include <varargs.h>
    108 #endif
    109 /*
    110  * Error reporting function
    111  */
    112 void
    113 #if __STDC__
    114 err(int severity, const char *fmt, ...)
    115 #else
    116 err(severity, fmt, va_alist)
    117 	int severity;
    118 	char *fmt;
    119         va_dcl
    120 #endif
    121 {
    122 	va_list ap;
    123 #if __STDC__
    124 	va_start(ap, fmt);
    125 #else
    126 	va_start(ap);
    127 #endif
    128 	(void)fprintf(stderr, "sed: ");
    129 	switch (severity) {
    130 	case WARNING:
    131 	case COMPILE:
    132 		(void)fprintf(stderr, "%lu: %s: ", linenum, fname);
    133 	}
    134 	(void)vfprintf(stderr, fmt, ap);
    135 	va_end(ap);
    136 	(void)fprintf(stderr, "\n");
    137 	if (severity == WARNING)
    138 		return;
    139 	exit(1);
    140 	/* NOTREACHED */
    141 }
    142