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-rw-r--r--util/xutil.c136
1 files changed, 136 insertions, 0 deletions
diff --git a/util/xutil.c b/util/xutil.c
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+++ b/util/xutil.c
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+/* xutil.c - Various wrapper functions to abort on error.
+ *
+ * Copyright © 2009 Carl Worth
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/ .
+ *
+ * Author: Carl Worth <cworth@cworth.org>
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "xutil.h"
+#include "error_util.h"
+
+void *
+xcalloc (size_t nmemb, size_t size)
+{
+ void *ret;
+
+ ret = calloc (nmemb, size);
+ if (ret == NULL) {
+ fprintf (stderr, "Out of memory.\n");
+ exit (1);
+ }
+
+ return ret;
+}
+
+void *
+xmalloc (size_t size)
+{
+ void *ret;
+
+ ret = malloc (size);
+ if (ret == NULL) {
+ fprintf (stderr, "Out of memory.\n");
+ exit (1);
+ }
+
+ return ret;
+}
+
+void *
+xrealloc (void *ptr, size_t size)
+{
+ void *ret;
+
+ ret = realloc (ptr, size);
+ if (ret == NULL) {
+ fprintf (stderr, "Out of memory.\n");
+ exit (1);
+ }
+
+ return ret;
+}
+
+char *
+xstrdup (const char *s)
+{
+ char *ret;
+
+ ret = strdup (s);
+ if (ret == NULL) {
+ fprintf (stderr, "Out of memory.\n");
+ exit (1);
+ }
+
+ return ret;
+}
+
+char *
+xstrndup (const char *s, size_t n)
+{
+ char *ret;
+
+ if (strlen (s) <= n)
+ n = strlen (s);
+
+ ret = malloc (n + 1);
+ if (ret == NULL) {
+ fprintf (stderr, "Out of memory.\n");
+ exit (1);
+ }
+ memcpy (ret, s, n);
+ ret[n] = '\0';
+
+ return ret;
+}
+
+void
+xregcomp (regex_t *preg, const char *regex, int cflags)
+{
+ int rerr;
+
+ rerr = regcomp (preg, regex, cflags);
+ if (rerr) {
+ size_t error_size = regerror (rerr, preg, NULL, 0);
+ char *error = xmalloc (error_size);
+
+ regerror (rerr, preg, error, error_size);
+ INTERNAL_ERROR ("compiling regex %s: %s\n",
+ regex, error);
+ }
+}
+
+int
+xregexec (const regex_t *preg, const char *string,
+ size_t nmatch, regmatch_t pmatch[], int eflags)
+{
+ unsigned int i;
+ int rerr;
+
+ rerr = regexec (preg, string, nmatch, pmatch, eflags);
+ if (rerr)
+ return rerr;
+
+ for (i = 0; i < nmatch; i++) {
+ if (pmatch[i].rm_so == -1)
+ INTERNAL_ERROR ("matching regex against %s: Sub-match %d not found\n",
+ string, i);
+ }
+
+ return 0;
+}