util: add string-util.[ch]

This is to give a home to strtok_len. It's a bit silly to add a header
for one routine, but it needs to be shared between several compilation
units (or at least that's the most natural design).

1 files changed, 34 insertions, 0 deletions

diff --git a/util/string-util.c b/util/string-util.c
new file mode 100644
index 00000000..44f8cd3a
--- /dev/null
+++ b/util/string-util.c
@@ -0,0 +1,34 @@
+/* string-util.c -  Extra or enhanced routines for null terminated strings.
+ *
+ * Copyright (c) 2012 Jani Nikula
+ *
+ * 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: Jani Nikula <jani@nikula.org>
+ */
+
+
+#include "string-util.h"
+
+char *
+strtok_len (char *s, const char *delim, size_t *len)
+{
+    /* skip initial delims */
+    s += strspn (s, delim);
+
+    /* length of token */
+    *len = strcspn (s, delim);
+
+    return *len ? s : NULL;
+}