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| 1 /* | |
| 2 * Copyright 2016 The WebRTC Project Authors. All rights reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 // This file defines six constexpr functions: | |
| 12 // | |
| 13 // rtc::SafeEq // == | |
| 14 // rtc::SafeNe // != | |
| 15 // rtc::SafeLt // < | |
| 16 // rtc::SafeLe // <= | |
| 17 // rtc::SafeGt // > | |
| 18 // rtc::SafeGe // >= | |
| 19 // | |
| 20 // They each accept two arguments of arbitrary types, and in almost all cases, | |
| 21 // they simply call the appropriate comparison operator. However, if both | |
| 22 // arguments are integers, they don't compare them using C++'s quirky rules, | |
| 23 // but instead adhere to the true mathematical definitions. It is as if the | |
| 24 // arguments were first converted to infinite-range signed integers, and then | |
| 25 // compared, although of course nothing expensive like that actually takes | |
| 26 // place. In practice, for signed/signed and unsigned/unsigned comparisons and | |
| 27 // some mixed-signed comparisons with a compile-time constant, the overhead is | |
| 28 // zero; in the remaining cases, it is just a few machine instructions (no | |
| 29 // branches). | |
| 30 | |
| 31 #ifndef WEBRTC_BASE_SAFE_COMPARE_H_ | |
| 32 #define WEBRTC_BASE_SAFE_COMPARE_H_ | |
| 33 | |
| 34 | |
| 35 // This header is deprecated and is just left here temporarily during | |
| 36 // refactoring. See https://bugs.webrtc.org/7634 for more details. | |
| 37 #include "webrtc/rtc_base/safe_compare.h" | |
| 38 | |
| 39 #endif // WEBRTC_BASE_SAFE_COMPARE_H_ | |
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Chromium Code Reviews
Issue 2976293002:
Remove remains of webrtc/base (Closed)
