1 | /* Copyright (C) 1996-2022 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 | #ifdef WMEMCMP |
21 | # define __wmemcmp WMEMCMP |
22 | #endif |
23 | |
24 | int |
25 | __wmemcmp (const wchar_t *s1, const wchar_t *s2, size_t n) |
26 | { |
27 | wchar_t c1; |
28 | wchar_t c2; |
29 | |
30 | while (n >= 4) |
31 | { |
32 | c1 = s1[0]; |
33 | c2 = s2[0]; |
34 | if (c1 - c2 != 0) |
35 | return c1 > c2 ? 1 : -1; |
36 | c1 = s1[1]; |
37 | c2 = s2[1]; |
38 | if (c1 - c2 != 0) |
39 | return c1 > c2 ? 1 : -1; |
40 | c1 = s1[2]; |
41 | c2 = s2[2]; |
42 | if (c1 - c2 != 0) |
43 | return c1 > c2 ? 1 : -1; |
44 | c1 = s1[3]; |
45 | c2 = s2[3]; |
46 | if (c1 - c2 != 0) |
47 | return c1 > c2 ? 1 : -1; |
48 | s1 += 4; |
49 | s2 += 4; |
50 | n -= 4; |
51 | } |
52 | |
53 | if (n > 0) |
54 | { |
55 | c1 = s1[0]; |
56 | c2 = s2[0]; |
57 | if (c1 - c2 != 0) |
58 | return c1 > c2 ? 1 : -1; |
59 | ++s1; |
60 | ++s2; |
61 | --n; |
62 | } |
63 | if (n > 0) |
64 | { |
65 | c1 = s1[0]; |
66 | c2 = s2[0]; |
67 | if (c1 - c2 != 0) |
68 | return c1 > c2 ? 1 : -1; |
69 | ++s1; |
70 | ++s2; |
71 | --n; |
72 | } |
73 | if (n > 0) |
74 | { |
75 | c1 = s1[0]; |
76 | c2 = s2[0]; |
77 | if (c1 - c2 != 0) |
78 | return c1 > c2 ? 1 : -1; |
79 | } |
80 | |
81 | return 0; |
82 | } |
83 | #ifndef WMEMCMP |
84 | weak_alias (__wmemcmp, wmemcmp) |
85 | #endif |
86 | |