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b168057a | 1 | /* Copyright (C) 1996-2015 Free Software Foundation, Inc. |
33a934a3 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996. | |
30de3b18 | 4 | |
33a934a3 | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
30de3b18 | 9 | |
33a934a3 UD |
10 | The GNU C Library 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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
30de3b18 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
30de3b18 RM |
18 | |
19 | #include <wchar.h> | |
20 | ||
be13f7bf | 21 | #ifndef WMEMCMP |
b468825a | 22 | # define WMEMCMP wmemcmp |
be13f7bf | 23 | #endif |
30de3b18 RM |
24 | |
25 | int | |
9d46370c | 26 | WMEMCMP (const wchar_t *s1, const wchar_t *s2, size_t n) |
30de3b18 | 27 | { |
2e09a79a JM |
28 | wchar_t c1; |
29 | wchar_t c2; | |
30de3b18 RM |
30 | |
31 | while (n >= 4) | |
32 | { | |
1f1e1947 AS |
33 | c1 = s1[0]; |
34 | c2 = s2[0]; | |
30de3b18 | 35 | if (c1 - c2 != 0) |
be13f7bf | 36 | return c1 > c2 ? 1 : -1; |
1f1e1947 AS |
37 | c1 = s1[1]; |
38 | c2 = s2[1]; | |
30de3b18 | 39 | if (c1 - c2 != 0) |
be13f7bf | 40 | return c1 > c2 ? 1 : -1; |
1f1e1947 AS |
41 | c1 = s1[2]; |
42 | c2 = s2[2]; | |
30de3b18 | 43 | if (c1 - c2 != 0) |
be13f7bf | 44 | return c1 > c2 ? 1 : -1; |
1f1e1947 AS |
45 | c1 = s1[3]; |
46 | c2 = s2[3]; | |
30de3b18 | 47 | if (c1 - c2 != 0) |
be13f7bf | 48 | return c1 > c2 ? 1 : -1; |
30de3b18 RM |
49 | s1 += 4; |
50 | s2 += 4; | |
51 | n -= 4; | |
52 | } | |
53 | ||
54 | if (n > 0) | |
55 | { | |
1f1e1947 AS |
56 | c1 = s1[0]; |
57 | c2 = s2[0]; | |
30de3b18 | 58 | if (c1 - c2 != 0) |
be13f7bf | 59 | return c1 > c2 ? 1 : -1; |
30de3b18 RM |
60 | ++s1; |
61 | ++s2; | |
62 | --n; | |
63 | } | |
64 | if (n > 0) | |
65 | { | |
1f1e1947 AS |
66 | c1 = s1[0]; |
67 | c2 = s2[0]; | |
30de3b18 | 68 | if (c1 - c2 != 0) |
be13f7bf | 69 | return c1 > c2 ? 1 : -1; |
30de3b18 RM |
70 | ++s1; |
71 | ++s2; | |
72 | --n; | |
73 | } | |
74 | if (n > 0) | |
75 | { | |
1f1e1947 AS |
76 | c1 = s1[0]; |
77 | c2 = s2[0]; | |
30de3b18 | 78 | if (c1 - c2 != 0) |
be13f7bf | 79 | return c1 > c2 ? 1 : -1; |
30de3b18 RM |
80 | } |
81 | ||
82 | return 0; | |
83 | } |