1 files changed, 47 insertions, 0 deletions
diff --git a/strings/strnlen.c b/strings/strnlen.c
new file mode 100644
index 00000000..c831d632
--- /dev/null
+++ b/strings/strnlen.c
@@ -0,0 +1,47 @@
+/* Copyright Richard A. O'Keefe.
+   Copyright (c) 2000 TXT DataKonsult Ab & Monty Program Ab
+   Copyright (c) 2009-2011, Monty Program Ab
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are
+   met:
+
+   1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must the following disclaimer in
+     the documentation and/or other materials provided with the
+     distribution.
+
+   THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND ANY
+   EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+   OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+   SUCH DAMAGE.
+*/
+
+/*  File   : strnlen.c
+    Author : Michael Widenius
+    Updated: 20 April 1984
+    Defines: strnlen.
+    strnlen(s, len) returns the length of s or len if s is longer than len.
+*/
+
+#include "strings_def.h"
+
+#ifndef HAVE_STRNLEN
+
+size_t strnlen(register const char *s, register size_t maxlen)
+{
+  const char *end= (const char *)memchr(s, '\0', maxlen);
+  return end ? (size_t) (end - s) : maxlen;
+}
+
+#endif