| // Copyright (c) 2016 The WebM 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. |
| #include "src/bit_utils.h" |
| |
| #include <cstdint> |
| |
| namespace webm { |
| |
| std::uint8_t CountLeadingZeros(std::uint8_t value) { |
| // Special case for 0 since we can't shift by sizeof(T) * 8 bytes. |
| if (value == 0) |
| return 8; |
| |
| std::uint8_t count = 0; |
| while (!(value & (0x80 >> count))) { |
| ++count; |
| } |
| return count; |
| } |
| |
| } // namespace webm |
