third_party.pigweed.src/pw_kvs/checksum.cc
Wyatt Hepler 4da1fcb4b2 pw_kvs: Initial commit of new KVS design
Builds, but lots more work needed.

Fun fact: this code was written collaboratively in a Google Doc.

Change-Id: I8a89c5d0fdc71ec28cf432350e65d17e24a6f25c
2020-01-31 14:38:37 -08:00

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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.
#include "pw_kvs/checksum.h"
#include <cstring>
namespace pw::kvs {
using std::byte;
Status ChecksumAlgorithm::Verify(span<const byte> checksum) const {
if (checksum.size() != size_bytes()) {
return Status::INVALID_ARGUMENT;
}
if (std::memcmp(state_.data(), checksum.data(), state_.size()) != 0) {
return Status::DATA_LOSS;
}
return Status::OK;
}
} // namespace pw::kvs