| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) International Business Machines Corp., 2001 |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program 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 |
| 12 | * the GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | */ |
| 18 | #ifndef _H_ENDIAN24 |
| 19 | #define _H_ENDIAN24 |
| 20 | |
| 21 | /* |
| 22 | * endian24.h: |
| 23 | * |
| 24 | * Endian conversion for 24-byte data |
| 25 | * |
| 26 | */ |
| 27 | #define __swab24(x) \ |
| 28 | ({ \ |
| 29 | __u32 __x = (x); \ |
| 30 | ((__u32)( \ |
| 31 | ((__x & (__u32)0x000000ffUL) << 16) | \ |
| 32 | (__x & (__u32)0x0000ff00UL) | \ |
| 33 | ((__x & (__u32)0x00ff0000UL) >> 16) )); \ |
| 34 | }) |
| 35 | |
| 36 | #if (defined(__KERNEL__) && defined(__LITTLE_ENDIAN)) || (defined(__BYTE_ORDER) && (__BYTE_ORDER == __LITTLE_ENDIAN)) |
| 37 | #define __cpu_to_le24(x) ((__u32)(x)) |
| 38 | #define __le24_to_cpu(x) ((__u32)(x)) |
| 39 | #else |
| 40 | #define __cpu_to_le24(x) __swab24(x) |
| 41 | #define __le24_to_cpu(x) __swab24(x) |
| 42 | #endif |
| 43 | |
| 44 | #ifdef __KERNEL__ |
| 45 | #define cpu_to_le24 __cpu_to_le24 |
| 46 | #define le24_to_cpu __le24_to_cpu |
| 47 | #endif |
| 48 | |
| 49 | #endif /* !_H_ENDIAN24 */ |