usr.bin/sed/misc.c

   1 /*      $NetBSD: misc.c,v 1.9 2006/06/18 05:16:41 gdamore Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Diomidis Spinellis of Imperial College, University of London.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 /*-
  36  * Copyright (c) 1992 Diomidis Spinellis.
  37  *
  38  * This code is derived from software contributed to Berkeley by
  39  * Diomidis Spinellis of Imperial College, University of London.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. All advertising materials mentioning features or use of this software
  50  *    must display the following acknowledgement:
  51  *      This product includes software developed by the University of
  52  *      California, Berkeley and its contributors.
  53  * 4. Neither the name of the University nor the names of its contributors
  54  *    may be used to endorse or promote products derived from this software
  55  *    without specific prior written permission.
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  58  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  59  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  60  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  61  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  62  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  63  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  64  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  65  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  66  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  67  * SUCH DAMAGE.
  68  */
  69
  70 #if HAVE_NBTOOL_CONFIG_H
  71 #include "nbtool_config.h"
  72 #endif
  73
  74 #include <sys/cdefs.h>
  75 #ifndef lint
  76 #if 0
  77 static char sccsid[] = "@(#)misc.c      8.1 (Berkeley) 6/6/93";
  78 #else
  79 __RCSID("$NetBSD: misc.c,v 1.9 2006/06/18 05:16:41 gdamore Exp $");
  80 #endif
  81 #endif /* not lint */
  82
  83 #include <sys/types.h>
  84
  85 #include <errno.h>
  86 #include <regex.h>
  87 #include <stdarg.h>
  88 #include <stdio.h>
  89 #include <stdlib.h>
  90 #include <string.h>
  91
  92 #include "defs.h"
  93 #include "extern.h"
  94
  95 /*
  96  * malloc with result test
  97  */
  98 void *
  99 xmalloc(u_int size)
 100 {
 101         void *p;
 102
 103         if ((p = malloc(size)) == NULL)
 104                 err(FATAL, "%s", strerror(errno));
 105         return (p);
 106 }
 107
 108 /*
 109  * realloc with result test
 110  */
 111 void *
 112 xrealloc(void *p, u_int size)
 113 {
 114         if (p == NULL)                  /* Compatibility hack. */
 115                 return (xmalloc(size));
 116
 117         if ((p = realloc(p, size)) == NULL)
 118                 err(FATAL, "%s", strerror(errno));
 119         return (p);
 120 }
 121
 122 /*
 123  * Return a string for a regular expression error passed.  This is a overkill,
 124  * because of the silly semantics of regerror (we can never know the size of
 125  * the buffer).
 126  */
 127 char *
 128 strregerror(int errcode, regex_t *preg)
 129 {
 130         char buf[1];
 131         static char *oe;
 132         size_t s;
 133
 134         if (oe != NULL)
 135                 free(oe);
 136         s = regerror(errcode, preg, buf, 0);
 137         oe = xmalloc(s);
 138         (void)regerror(errcode, preg, oe, s);
 139         return (oe);
 140 }
 141
 142 /*
 143  * Error reporting function
 144  */
 145 void
 146 err(int severity, const char *fmt, ...)
 147 {
 148         va_list ap;
 149
 150         va_start(ap, fmt);
 151         (void)fprintf(stderr, "sed: ");
 152         switch (severity) {
 153         case WARNING:
 154         case COMPILE:
 155                 (void)fprintf(stderr, "%lu: %s: ", linenum, fname);
 156         }
 157         (void)vfprintf(stderr, fmt, ap);
 158         va_end(ap);
 159         (void)fprintf(stderr, "\n");
 160         if (severity == WARNING)
 161                 return;
 162         exit(1);
 163         /* NOTREACHED */
 164 }