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-rw-r--r--lib/unistr/u32-cmp.c40
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diff --git a/lib/unistr/u32-cmp.c b/lib/unistr/u32-cmp.c
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+/* Compare pieces of UTF-32 strings.
+ Copyright (C) 1999, 2002, 2006 Free Software Foundation, Inc.
+ Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+ This program is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Lesser 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+/* Specification. */
+#include "unistr.h"
+
+int
+u32_cmp (const uint32_t *s1, const uint32_t *s2, size_t n)
+{
+ for (; n > 0;)
+ {
+ uint32_t uc1 = *s1++;
+ uint32_t uc2 = *s2++;
+ if (uc1 == uc2)
+ {
+ n--;
+ continue;
+ }
+ /* Note that uc1 and uc2 each have at most 31 bits. */
+ return (int)uc1 - (int)uc2;
+ /* > 0 if uc1 > uc2, < 0 if uc1 < uc2. */
+ }
+ return 0;
+}