37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
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/*
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* Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef NET_DCSCTP_COMMON_MATH_H_
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#define NET_DCSCTP_COMMON_MATH_H_
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namespace dcsctp {
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// Rounds up `val` to the nearest value that is divisible by four. Frequently
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// used to e.g. pad chunks or parameters to an even 32-bit offset.
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template <typename IntType>
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IntType RoundUpTo4(IntType val) {
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return (val + 3) & ~3;
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}
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// Similarly, rounds down `val` to the nearest value that is divisible by four.
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template <typename IntType>
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IntType RoundDownTo4(IntType val) {
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return val & ~3;
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}
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// Returns true if `val` is divisible by four.
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template <typename IntType>
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bool IsDivisibleBy4(IntType val) {
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return (val & 3) == 0;
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}
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} // namespace dcsctp
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#endif // NET_DCSCTP_COMMON_MATH_H_
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