| 1 | /* |
| 2 | * This file is part of DisOrder |
| 3 | * Copyright (C) 2004, 2005, 2007, 2008, 2013 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.h |
| 19 | * @brief Generic binary search |
| 20 | */ |
| 21 | #ifndef TABLE_H |
| 22 | #define TABLE_H |
| 23 | |
| 24 | #include <stddef.h> |
| 25 | |
| 26 | #if _WIN32 |
| 27 | #define OFFSETOF_IN_OBJECT(OBJECT,FIELD) ((char *)&(OBJECT).FIELD - (char *)&(OBJECT)) |
| 28 | #else |
| 29 | #define OFFSETOF_IN_OBJECT(OBJECT,FIELD) offsetof(typeof(OBJECT),FIELD) |
| 30 | #endif |
| 31 | |
| 32 | #define TABLE_FIND(TABLE, FIELD, NAME) \ |
| 33 | table_find((void *)TABLE, \ |
| 34 | OFFSETOF_IN_OBJECT(TABLE[0], FIELD), \ |
| 35 | sizeof ((TABLE)[0]), \ |
| 36 | sizeof TABLE / sizeof ((TABLE)[0]), \ |
| 37 | NAME) |
| 38 | /* Search TABLE[] for an element where TABLE[N].FIELD matches NAME |
| 39 | * Returns the index N on success or -1 if not found |
| 40 | * The table must be lexically sorted on FIELD |
| 41 | */ |
| 42 | |
| 43 | int table_find(const void *table, size_t offset, size_t eltsize, size_t nelts, |
| 44 | const char *name); |
| 45 | |
| 46 | #endif /* TABLE_H */ |
| 47 | |
| 48 | /* |
| 49 | Local Variables: |
| 50 | c-basic-offset:2 |
| 51 | comment-column:40 |
| 52 | End: |
| 53 | */ |