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Annotation of src/usr.bin/sed/misc.c, Revision 1.2

1.2     ! deraadt     1: /*     $OpenBSD$       */
        !             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.
                     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"; */
1.2     ! deraadt    42: static char *rcsid = "$OpenBSD: misc.c,v 1.1.1.1 1995/10/18 08:46:05 deraadt Exp $";
1.1       deraadt    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: }