webrtc/base/safe_compare.h

/*
 *  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_