| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1991-2015 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 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #ifdef HAVE_CONFIG_H |
| 19 | # include <config.h> |
| 20 | #endif |
| 21 | |
| 22 | #include <ctype.h> |
| 23 | #include <string.h> |
| 24 | |
| 25 | #ifndef _LIBC |
| 26 | # define __strcasecmp strcasecmp |
| 27 | # define TOLOWER(Ch) tolower (Ch) |
| 28 | #else |
| 29 | # include <locale/localeinfo.h> |
| 30 | # ifdef USE_IN_EXTENDED_LOCALE_MODEL |
| 31 | # define __strcasecmp __strcasecmp_l |
| 32 | # endif |
| 33 | # define TOLOWER(Ch) __tolower_l ((Ch), loc) |
| 34 | #endif |
| 35 | |
| 36 | #ifdef USE_IN_EXTENDED_LOCALE_MODEL |
| 37 | # define LOCALE_PARAM , loc |
| 38 | # define LOCALE_PARAM_DECL __locale_t loc; |
| 39 | #else |
| 40 | # define LOCALE_PARAM |
| 41 | # define LOCALE_PARAM_DECL |
| 42 | #endif |
| 43 | |
| 44 | /* Compare S1 and S2, ignoring case, returning less than, equal to or |
| 45 | greater than zero if S1 is lexicographically less than, |
| 46 | equal to or greater than S2. */ |
| 47 | int |
| 48 | __strcasecmp (s1, s2 LOCALE_PARAM) |
| 49 | const char *s1; |
| 50 | const char *s2; |
| 51 | LOCALE_PARAM_DECL |
| 52 | { |
| 53 | #if defined _LIBC && !defined USE_IN_EXTENDED_LOCALE_MODEL |
| 54 | __locale_t loc = _NL_CURRENT_LOCALE; |
| 55 | #endif |
| 56 | const unsigned char *p1 = (const unsigned char *) s1; |
| 57 | const unsigned char *p2 = (const unsigned char *) s2; |
| 58 | int result; |
| 59 | |
| 60 | if (p1 == p2) |
| 61 | return 0; |
| 62 | |
| 63 | while ((result = TOLOWER (*p1) - TOLOWER (*p2++)) == 0) |
| 64 | if (*p1++ == '\0') |
| 65 | break; |
| 66 | |
| 67 | return result; |
| 68 | } |
| 69 | #ifndef __strcasecmp |
| 70 | libc_hidden_def (__strcasecmp) |
| 71 | weak_alias (__strcasecmp, strcasecmp) |
| 72 | #endif |