--- /dev/null
+/* Compare wide character arrays.
+ Copyright (C) 1999, 2011 Free Software Foundation, Inc.
+ Written by Bruno Haible <bruno@clisp.org>, 1999.
+
+ 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/>. */
+
+int
+wmemcmp (const wchar_t *s1, const wchar_t *s2, size_t n)
+{
+ for (; n > 0;)
+ {
+ wchar_t wc1 = *s1++;
+ wchar_t wc2 = *s2++;
+ if (wc1 == wc2)
+ {
+ n--;
+ continue;
+ }
+ /* Note that wc1 and wc2 each have at most 31 bits. */
+ return (int)wc1 - (int)wc2;
+ /* > 0 if wc1 > wc2, < 0 if wc1 < wc2. */
+ }
+ return 0;
+}