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b43707234c
Summary: I want to reuse this outside the LocalStore implementation in a later diff. This has no functional changes. Reviewed By: chadaustin Differential Revision: D12814792 fbshipit-source-id: 2cc34b449a93afb2e71bd49ed6587009ebf3e419
60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
/*
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* Copyright (c) 2016-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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#include "SerializedBlobMetadata.h"
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#include <folly/Format.h>
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namespace facebook {
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namespace eden {
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SerializedBlobMetadata::SerializedBlobMetadata(const BlobMetadata& metadata) {
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serialize(metadata.sha1, metadata.size);
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}
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SerializedBlobMetadata::SerializedBlobMetadata(
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const Hash& contentsHash,
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uint64_t blobSize) {
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serialize(contentsHash, blobSize);
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}
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folly::ByteRange SerializedBlobMetadata::slice() const {
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return folly::ByteRange{data_};
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}
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BlobMetadata SerializedBlobMetadata::parse(
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Hash blobID,
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const StoreResult& result) {
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auto bytes = result.bytes();
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if (bytes.size() != SIZE) {
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throw std::invalid_argument(folly::sformat(
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"Blob metadata for {} had unexpected size {}. Could not deserialize.",
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blobID.toString(),
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bytes.size()));
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}
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uint64_t blobSizeBE;
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memcpy(&blobSizeBE, bytes.data(), sizeof(uint64_t));
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bytes.advance(sizeof(uint64_t));
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auto contentsHash = Hash{bytes};
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return BlobMetadata{contentsHash, folly::Endian::big(blobSizeBE)};
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}
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void SerializedBlobMetadata::serialize(
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const Hash& contentsHash,
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uint64_t blobSize) {
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uint64_t blobSizeBE = folly::Endian::big(blobSize);
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memcpy(data_.data(), &blobSizeBE, sizeof(uint64_t));
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memcpy(
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data_.data() + sizeof(uint64_t),
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contentsHash.getBytes().data(),
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Hash::RAW_SIZE);
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}
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} // namespace eden
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} // namespace facebook
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