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/*
* Copyright (c) 2021 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.
*/
#ifndef NET_DCSCTP_COMMON_MATH_H_
#define NET_DCSCTP_COMMON_MATH_H_
namespace dcsctp {
// Rounds up `val` to the nearest value that is divisible by four. Frequently
// used to e.g. pad chunks or parameters to an even 32-bit offset.
template <typename IntType>
IntType RoundUpTo4(IntType val) {
return (val + 3) & ~3;
}
// Similarly, rounds down `val` to the nearest value that is divisible by four.
template <typename IntType>
IntType RoundDownTo4(IntType val) {
return val & ~3;
}
// Returns true if `val` is divisible by four.
template <typename IntType>
bool IsDivisibleBy4(IntType val) {
return (val & 3) == 0;
}
} // namespace dcsctp
#endif // NET_DCSCTP_COMMON_MATH_H_
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