| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Perform binary search - inline version. |
| 2 | Copyright (C) 1991-2015 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 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. |
| 9 | |
| 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 |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | __extern_inline void * |
| 20 | bsearch (const void *__key, const void *__base, size_t __nmemb, size_t __size, |
| 21 | __compar_fn_t __compar) |
| 22 | { |
| 23 | size_t __l, __u, __idx; |
| 24 | const void *__p; |
| 25 | int __comparison; |
| 26 | |
| 27 | __l = 0; |
| 28 | __u = __nmemb; |
| 29 | while (__l < __u) |
| 30 | { |
| 31 | __idx = (__l + __u) / 2; |
| 32 | __p = (void *) (((const char *) __base) + (__idx * __size)); |
| 33 | __comparison = (*__compar) (__key, __p); |
| 34 | if (__comparison < 0) |
| 35 | __u = __idx; |
| 36 | else if (__comparison > 0) |
| 37 | __l = __idx + 1; |
| 38 | else |
| 39 | return (void *) __p; |
| 40 | } |
| 41 | |
| 42 | return NULL; |
| 43 | } |