| /* |
| * Copyright 2016 The WebRTC 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. |
| */ |
| |
| // This file defines six constexpr functions: |
| // |
| // rtc::SafeEq // == |
| // rtc::SafeNe // != |
| // rtc::SafeLt // < |
| // rtc::SafeLe // <= |
| // rtc::SafeGt // > |
| // rtc::SafeGe // >= |
| // |
| // They each accept two arguments of arbitrary types, and in almost all cases, |
| // they simply call the appropriate comparison operator. However, if both |
| // arguments are integers, they don't compare them using C++'s quirky rules, |
| // but instead adhere to the true mathematical definitions. It is as if the |
| // arguments were first converted to infinite-range signed integers, and then |
| // compared, although of course nothing expensive like that actually takes |
| // place. In practice, for signed/signed and unsigned/unsigned comparisons and |
| // some mixed-signed comparisons with a compile-time constant, the overhead is |
| // zero; in the remaining cases, it is just a few machine instructions (no |
| // branches). |
| |
| #ifndef WEBRTC_BASE_SAFE_COMPARE_H_ |
| #define WEBRTC_BASE_SAFE_COMPARE_H_ |
| |
| |
| // This header is deprecated and is just left here temporarily during |
| // refactoring. See https://bugs.webrtc.org/7634 for more details. |
| #include "webrtc/rtc_base/safe_compare.h" |
| |
| #endif // WEBRTC_BASE_SAFE_COMPARE_H_ |
