1/* Compare UTF-32 strings.
2   Copyright (C) 1999, 2002, 2006, 2009-2010 Free Software Foundation, Inc.
3   Written by Bruno Haible <bruno@clisp.org>, 2002.
4
5   This program is free software: you can redistribute it and/or modify it
6   under the terms of the GNU Lesser General Public License as published
7   by the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18#include <config.h>
19
20/* Specification.  */
21#include "unistr.h"
22
23int
24u32_strncmp (const uint32_t *s1, const uint32_t *s2, size_t n)
25{
26  for (; n > 0;)
27    {
28      uint32_t uc1 = *s1++;
29      uint32_t uc2 = *s2++;
30      if (uc1 != 0 && uc1 == uc2)
31        {
32          n--;
33          continue;
34        }
35      /* Note that uc1 and uc2 each have at most 31 bits. */
36      return (int)uc1 - (int)uc2;
37      /* > 0 if uc1 > uc2, < 0 if uc1 < uc2, = 0 if uc1 and uc2 are both 0.  */
38    }
39  return 0;
40}
41