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7a87830f5e
This pushes the error handling up one step, but makes the function more flexible. Running out of memory still triggers an internal error, in the spirit of other xutils functions.
139 lines
2.6 KiB
C
139 lines
2.6 KiB
C
/* xutil.c - Various wrapper functions to abort on error.
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*
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* Copyright © 2009 Carl Worth
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see http://www.gnu.org/licenses/ .
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*
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* Author: Carl Worth <cworth@cworth.org>
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*/
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#include <stdio.h>
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#include <string.h>
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#include "xutil.h"
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#include "error_util.h"
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void *
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xcalloc (size_t nmemb, size_t size)
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{
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void *ret;
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ret = calloc (nmemb, size);
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if (ret == NULL) {
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fprintf (stderr, "Out of memory.\n");
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exit (1);
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}
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return ret;
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}
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void *
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xmalloc (size_t size)
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{
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void *ret;
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ret = malloc (size);
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if (ret == NULL) {
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fprintf (stderr, "Out of memory.\n");
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exit (1);
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}
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return ret;
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}
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void *
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xrealloc (void *ptr, size_t size)
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{
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void *ret;
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ret = realloc (ptr, size);
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if (ret == NULL) {
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fprintf (stderr, "Out of memory.\n");
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exit (1);
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}
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return ret;
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}
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char *
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xstrdup (const char *s)
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{
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char *ret;
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ret = strdup (s);
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if (ret == NULL) {
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fprintf (stderr, "Out of memory.\n");
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exit (1);
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}
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return ret;
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}
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char *
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xstrndup (const char *s, size_t n)
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{
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char *ret;
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if (strlen (s) <= n)
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n = strlen (s);
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ret = malloc (n + 1);
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if (ret == NULL) {
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fprintf (stderr, "Out of memory.\n");
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exit (1);
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}
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memcpy (ret, s, n);
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ret[n] = '\0';
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return ret;
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}
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int
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xregcomp (regex_t *preg, const char *regex, int cflags)
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{
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int rerr;
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rerr = regcomp (preg, regex, cflags);
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if (rerr) {
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size_t error_size = regerror (rerr, preg, NULL, 0);
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char *error = xmalloc (error_size);
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regerror (rerr, preg, error, error_size);
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fprintf (stderr, "compiling regex %s: %s\n",
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regex, error);
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free (error);
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return 1;
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}
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return 0;
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}
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int
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xregexec (const regex_t *preg, const char *string,
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size_t nmatch, regmatch_t pmatch[], int eflags)
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{
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unsigned int i;
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int rerr;
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rerr = regexec (preg, string, nmatch, pmatch, eflags);
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if (rerr)
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return rerr;
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for (i = 0; i < nmatch; i++) {
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if (pmatch[i].rm_so == -1)
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INTERNAL_ERROR ("matching regex against %s: Sub-match %d not found\n",
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string, i);
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}
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return 0;
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}
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