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2f6d1f1b UD |
1 | /* Compare at most N wide characters of two strings without taking care |
2 | for the case. | |
04277e02 | 3 | Copyright (C) 1992-2019 Free Software Foundation, Inc. |
2f6d1f1b UD |
4 | This file is part of the GNU C Library. |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
2f6d1f1b UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
2f6d1f1b | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
2f6d1f1b | 19 | |
0501d603 UD |
20 | #ifdef HAVE_CONFIG_H |
21 | # include <config.h> | |
22 | #endif | |
23 | ||
2f6d1f1b UD |
24 | #include <wchar.h> |
25 | #include <wctype.h> | |
26 | ||
27 | #ifndef weak_alias | |
28 | # define __wcsncasecmp wcsncasecmp | |
0501d603 UD |
29 | # define TOLOWER(Ch) towlower (Ch) |
30 | #else | |
31 | # ifdef USE_IN_EXTENDED_LOCALE_MODEL | |
32 | # define __wcsncasecmp __wcsncasecmp_l | |
33 | # define TOLOWER(Ch) __towlower_l ((Ch), loc) | |
34 | # else | |
35 | # define TOLOWER(Ch) towlower (Ch) | |
36 | # endif | |
37 | #endif | |
38 | ||
39 | #ifdef USE_IN_EXTENDED_LOCALE_MODEL | |
af85385f | 40 | # define LOCALE_PARAM , locale_t loc |
0501d603 UD |
41 | #else |
42 | # define LOCALE_PARAM | |
2f6d1f1b UD |
43 | #endif |
44 | ||
45 | /* Compare no more than N wide characters of S1 and S2, | |
46 | ignoring case, returning less than, equal to or | |
47 | greater than zero if S1 is lexicographically less | |
48 | than, equal to or greater than S2. */ | |
49 | int | |
80d9be81 | 50 | __wcsncasecmp (const wchar_t *s1, const wchar_t *s2, size_t n LOCALE_PARAM) |
2f6d1f1b UD |
51 | { |
52 | wint_t c1, c2; | |
53 | ||
54 | if (s1 == s2 || n == 0) | |
55 | return 0; | |
56 | ||
57 | do | |
58 | { | |
0501d603 UD |
59 | c1 = (wint_t) TOLOWER (*s1++); |
60 | c2 = (wint_t) TOLOWER (*s2++); | |
2f6d1f1b UD |
61 | if (c1 == L'\0' || c1 != c2) |
62 | return c1 - c2; | |
63 | } while (--n > 0); | |
64 | ||
65 | return c1 - c2; | |
66 | } | |
0501d603 | 67 | #ifndef __wcsncasecmp |
2f6d1f1b UD |
68 | weak_alias (__wcsncasecmp, wcsncasecmp) |
69 | #endif |