1 /* Copyright (C) 1995-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <wchar.h>
19
20 #ifndef WCSCMP
21 # define WCSCMP __wcscmp
22 #endif
23
24 /* Compare S1 and S2, returning less than, equal to or
25 greater than zero if S1 is lexicographically less than,
26 equal to or greater than S2. */
27 int
WCSCMP(const wchar_t * s1,const wchar_t * s2)28 WCSCMP (const wchar_t *s1, const wchar_t *s2)
29 {
30 wchar_t c1, c2;
31
32 do
33 {
34 c1 = *s1++;
35 c2 = *s2++;
36 if (c2 == L'\0')
37 return c1 - c2;
38 }
39 while (c1 == c2);
40
41 return c1 < c2 ? -1 : 1;
42 }
43 libc_hidden_def (WCSCMP)
44 weak_alias (WCSCMP, wcscmp)
45