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// Copyright 2022 Huawei Cloud Computing Technology Co., Ltd.
//
// 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
//
// http://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.
#ifndef INCLUDED_SRC_COMMON_ARTIFACT_DIGEST_HPP
#define INCLUDED_SRC_COMMON_ARTIFACT_DIGEST_HPP
#include <cstddef>
#include <string>
#include <utility> // std::move
#include "src/buildtool/crypto/hash_info.hpp"
#include "src/utils/cpp/hash_combine.hpp"
// Provides getter for size with convenient non-protobuf type. Contains an
// unprefixed hex string as hash.
class ArtifactDigest final {
friend class ArtifactDigestFactory;
public:
ArtifactDigest() noexcept = default;
explicit ArtifactDigest(HashInfo hash_info, std::size_t size) noexcept
: hash_info_{std::move(hash_info)}, size_{size} {}
[[nodiscard]] auto hash() const& noexcept -> std::string const& {
return hash_info_.Hash();
}
[[nodiscard]] auto hash() && noexcept -> std::string {
return std::move(hash_info_).Hash();
}
[[nodiscard]] auto size() const noexcept -> std::size_t { return size_; }
[[nodiscard]] auto IsTree() const noexcept -> bool {
return hash_info_.IsTree();
}
[[nodiscard]] auto operator==(ArtifactDigest const& other) const -> bool {
return hash_info_ == other.hash_info_;
}
private:
HashInfo hash_info_;
std::size_t size_ = 0;
};
namespace std {
template <>
struct hash<ArtifactDigest> {
[[nodiscard]] auto operator()(ArtifactDigest const& digest) const noexcept
-> std::size_t {
std::size_t seed{};
hash_combine(&seed, digest.hash());
hash_combine(&seed, digest.IsTree());
return seed;
}
};
} // namespace std
#endif // INCLUDED_SRC_COMMON_ARTIFACT_DIGEST_HPP
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