| 1 | /* |
| 2 | * This file is part of DisOrder |
| 3 | * Copyright (C) 2004, 2007, 2008 Richard Kettlewell |
| 4 | * |
| 5 | * This program is free software: you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation, either version 3 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program 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 |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | /** @file lib/table.c |
| 19 | * @brief Generic binary search |
| 20 | */ |
| 21 | #include "common.h" |
| 22 | |
| 23 | #include "table.h" |
| 24 | |
| 25 | int table_find(const void *table, size_t offset, size_t eltsize, size_t nelts, |
| 26 | const char *name) { |
| 27 | int l = 0, r = (int)nelts - 1, c, m; |
| 28 | const char *k; |
| 29 | |
| 30 | while(l <= r) { |
| 31 | k = *(const char **)((char *)table + offset + eltsize * (m = (l + r) / 2)); |
| 32 | if(!(c = strcmp(name, k))) |
| 33 | return m; |
| 34 | if(c < 0) |
| 35 | r = m - 1; |
| 36 | else |
| 37 | l = m + 1; |
| 38 | } |
| 39 | return -1; |
| 40 | } |
| 41 | |
| 42 | /* |
| 43 | Local Variables: |
| 44 | c-basic-offset:2 |
| 45 | comment-column:40 |
| 46 | End: |
| 47 | */ |