1 files changed, 39 insertions, 0 deletions

diff --git a/lib/strlcat.c b/lib/strlcat.c
new file mode 100644
index 0000000..5d4e99e
--- /dev/null
+++ b/lib/strlcat.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2011 Apple, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#include <strings.h>
+
+size_t
+strlcat(char * restrict dst, const char * restrict src, size_t maxlen) {
+    const size_t srclen = strlen(src);
+    const size_t dstlen = strnlen(dst, maxlen);
+    if (dstlen == maxlen) return maxlen+srclen;
+    if (srclen < maxlen-dstlen) {
+        memcpy(dst+dstlen, src, srclen+1);
+    } else {
+        memcpy(dst+dstlen, src, maxlen-1);
+        dst[dstlen+maxlen-1] = '\0';
+    }
+    return dstlen + srclen;
+}
+