WL#5945 : Improve libedit library

Updated libedit library.

cmd-line-utils/libedit/np/wcsdup.c

@@ -0,0 +1,43 @@
+/*	$NetBSD: wcsdup.c,v 1.3 2008/05/26 13:17:48 haad Exp $	*/
+
+/*
+ * Copyright (C) 2006 Aleksey Cheusov
+ *
+ * This material is provided "as is", with absolutely no warranty expressed
+ * or implied. Any use is at your own risk.
+ *
+ * Permission to use or copy this software for any purpose is hereby granted 
+ * without fee. Permission to modify the code and to distribute modified
+ * code is also granted without any restrictions.
+ */
+
+#ifndef HAVE_WCSDUP
+
+#include "config.h"
+
+#if defined(LIBC_SCCS) && !defined(lint) 
+__RCSID("$NetBSD: wcsdup.c,v 1.3 2008/05/26 13:17:48 haad Exp $"); 
+#endif /* LIBC_SCCS and not lint */ 
+
+#include <stdlib.h>
+#include <assert.h>
+#include <wchar.h>
+
+wchar_t *
+wcsdup(const wchar_t *str)
+{
+	wchar_t *copy;
+	size_t len;
+
+	_DIAGASSERT(str != NULL);
+
+	len = wcslen(str) + 1;
+	copy = malloc(len * sizeof (wchar_t));
+
+	if (!copy)
+		return NULL;
+
+	return wmemcpy(copy, str, len);
+}
+
+#endif