Michael Clark | f0d0888 | 2007-03-13 08:26:18 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * $Id: bits.h,v 1.3 2004/07/21 10:10:22 mclark Exp $ |
| 3 | * |
| 4 | * Copyright Metaparadigm Pte. Ltd. 2004. |
| 5 | * Michael Clark <michael@metaparadigm.com> |
| 6 | * |
| 7 | * This library is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public (LGPL) |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This library is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details: http://www.gnu.org/ |
| 16 | * |
| 17 | */ |
| 18 | |
| 19 | #ifndef _bits_h_ |
| 20 | #define _bits_h_ |
| 21 | |
| 22 | #define min(x,y) ({ \ |
| 23 | typeof(x) _x = (x); \ |
| 24 | typeof(y) _y = (y); \ |
| 25 | (void) (&_x == &_y); \ |
| 26 | _x < _y ? _x : _y; }) |
| 27 | |
| 28 | #define max(x,y) ({ \ |
| 29 | typeof(x) _x = (x); \ |
| 30 | typeof(y) _y = (y); \ |
| 31 | (void) (&_x == &_y); \ |
| 32 | _x > _y ? _x : _y; }) |
| 33 | |
| 34 | #define hexdigit(x) (((x) <= '9') ? (x) - '0' : ((x) & 7) + 9) |
| 35 | #define error_ptr(error) ((void*)error) |
| 36 | #define is_error(ptr) ((unsigned long)ptr > (unsigned long)-4000L) |
| 37 | |
| 38 | #endif |