| /* |
| * Copyright (c) 2010 The VP8 project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be |
| * found in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| #ifndef BIT_OPS_H |
| #define BIT_OPS_H |
| |
| /* Evaluates to a mask with n bits set */ |
| #define BITS_MASK(n) ((1<<(n))-1) |
| |
| /* Returns len bits, with the LSB at position bit */ |
| #define BITS_GET(val, bit, len) (((val)>>(bit))&BITS_MASK(len)) |
| |
| #endif |
