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// Copyright 2020 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#pragma once
#include <span>
#include "pw_checksum/crc16_ccitt.h"
#include "pw_kvs/checksum.h"
namespace pw::kvs {
class ChecksumCrc16 final : public ChecksumAlgorithm {
public:
ChecksumCrc16()
: ChecksumAlgorithm(std::as_bytes(std::span<uint16_t>(&crc_, 1))) {}
void Reset() override { crc_ = checksum::Crc16Ccitt::kInitialValue; }
void Update(std::span<const std::byte> data) override {
crc_ = checksum::Crc16Ccitt::Calculate(data, crc_);
}
private:
uint16_t crc_ = checksum::Crc16Ccitt::kInitialValue;
};
} // namespace pw::kvs
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