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Annotation of src/usr.bin/sed/misc.c, Revision 1.9

1.9     ! deraadt     1: /*     $OpenBSD: misc.c,v 1.8 2008/10/08 17:26:47 millert Exp $        */
1.2       deraadt     2:
1.1       deraadt     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.
1.5       millert    19:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  */
                     35:
                     36: #include <sys/types.h>
                     37:
                     38: #include <errno.h>
                     39: #include <regex.h>
                     40: #include <stdio.h>
                     41: #include <stdlib.h>
                     42: #include <string.h>
1.4       millert    43: #include <stdarg.h>
1.1       deraadt    44:
                     45: #include "defs.h"
                     46: #include "extern.h"
                     47:
                     48: /*
                     49:  * malloc with result test
                     50:  */
                     51: void *
1.8       millert    52: xmalloc(size_t size)
1.1       deraadt    53: {
                     54:        void *p;
                     55:
                     56:        if ((p = malloc(size)) == NULL)
                     57:                err(FATAL, "%s", strerror(errno));
                     58:        return (p);
                     59: }
                     60:
                     61: /*
                     62:  * realloc with result test
                     63:  */
                     64: void *
1.8       millert    65: xrealloc(void *p, size_t size)
1.1       deraadt    66: {
                     67:
                     68:        if ((p = realloc(p, size)) == NULL)
                     69:                err(FATAL, "%s", strerror(errno));
                     70:        return (p);
                     71: }
                     72:
                     73: /*
                     74:  * Return a string for a regular expression error passed.  This is a overkill,
                     75:  * because of the silly semantics of regerror (we can never know the size of
                     76:  * the buffer).
                     77:  */
                     78: char *
1.6       deraadt    79: strregerror(int errcode, regex_t *preg)
1.1       deraadt    80: {
                     81:        static char *oe;
                     82:        size_t s;
                     83:
1.7       tedu       84:        free(oe);
1.1       deraadt    85:        s = regerror(errcode, preg, "", 0);
                     86:        oe = xmalloc(s);
                     87:        (void)regerror(errcode, preg, oe, s);
                     88:        return (oe);
                     89: }
                     90:
                     91: /*
                     92:  * Error reporting function
                     93:  */
                     94: void
                     95: err(int severity, const char *fmt, ...)
                     96: {
                     97:        va_list ap;
1.4       millert    98:
1.1       deraadt    99:        va_start(ap, fmt);
                    100:        (void)fprintf(stderr, "sed: ");
                    101:        switch (severity) {
                    102:        case WARNING:
                    103:        case COMPILE:
                    104:                (void)fprintf(stderr, "%lu: %s: ", linenum, fname);
                    105:        }
                    106:        (void)vfprintf(stderr, fmt, ap);
                    107:        va_end(ap);
                    108:        (void)fprintf(stderr, "\n");
                    109:        if (severity == WARNING)
                    110:                return;
                    111:        exit(1);
                    112:        /* NOTREACHED */
                    113: }