string: Implement strnlen() if it is missing.

[sliver-openvswitch.git] / lib / string.c

diff --git a/lib/string.c b/lib/string.c
new file mode 100644 (file)
index 0000000..f9ce788
--- /dev/null
+++ b/lib/string.c
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2009, 2011 Nicira Networks.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <config.h>
+
+#include <string.h>
+
+#ifndef HAVE_STRNLEN
+size_t
+strnlen(const char *s, size_t maxlen)
+{
+    const char *end = memchr(s, '\0', maxlen);
+    return end ? end - s : maxlen;
+}
+#endif