| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Compare at most N wide characters of two strings without taking care |
| 2 | for the case. |
| 3 | Copyright (C) 1992-2015 Free Software Foundation, Inc. |
| 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 |
| 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. |
| 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 |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #ifdef HAVE_CONFIG_H |
| 21 | # include <config.h> |
| 22 | #endif |
| 23 | |
| 24 | #include <wchar.h> |
| 25 | #include <wctype.h> |
| 26 | |
| 27 | #ifndef weak_alias |
| 28 | # define __wcsncasecmp wcsncasecmp |
| 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 |
| 40 | # define LOCALE_PARAM , loc |
| 41 | # define LOCALE_PARAM_DECL __locale_t loc; |
| 42 | #else |
| 43 | # define LOCALE_PARAM |
| 44 | # define LOCALE_PARAM_DECL |
| 45 | #endif |
| 46 | |
| 47 | /* Compare no more than N wide characters of S1 and S2, |
| 48 | ignoring case, returning less than, equal to or |
| 49 | greater than zero if S1 is lexicographically less |
| 50 | than, equal to or greater than S2. */ |
| 51 | int |
| 52 | __wcsncasecmp (s1, s2, n LOCALE_PARAM) |
| 53 | const wchar_t *s1; |
| 54 | const wchar_t *s2; |
| 55 | size_t n; |
| 56 | LOCALE_PARAM_DECL |
| 57 | { |
| 58 | wint_t c1, c2; |
| 59 | |
| 60 | if (s1 == s2 || n == 0) |
| 61 | return 0; |
| 62 | |
| 63 | do |
| 64 | { |
| 65 | c1 = (wint_t) TOLOWER (*s1++); |
| 66 | c2 = (wint_t) TOLOWER (*s2++); |
| 67 | if (c1 == L'\0' || c1 != c2) |
| 68 | return c1 - c2; |
| 69 | } while (--n > 0); |
| 70 | |
| 71 | return c1 - c2; |
| 72 | } |
| 73 | #ifndef __wcsncasecmp |
| 74 | weak_alias (__wcsncasecmp, wcsncasecmp) |
| 75 | #endif |