60 lines
1.4 KiB
Protocol Buffer
60 lines
1.4 KiB
Protocol Buffer
//
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// Copyright (C) 2021 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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syntax = "proto3";
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package chromeos_update_engine;
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option optimize_for = LITE_RUNTIME;
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message CompressionAlgorithm {
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enum Type {
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UNCOMPRESSED = 0;
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LZ4 = 1;
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LZ4HC = 2;
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}
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Type type = 1;
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int32 level = 2;
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}
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message CompressedBlockInfo {
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// Require fields
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uint64 uncompressed_offset = 1;
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uint64 uncompressed_length = 2;
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uint64 compressed_length = 3;
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// optional SHA256 hash of re-compressed blob
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bytes sha256_hash = 4;
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// Patch to apply to re-compressed blob
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bytes postfix_bspatch = 5;
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}
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enum InnerPatchType {
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BSDIFF = 0;
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PUFFDIFF = 1;
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}
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message CompressionInfo {
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CompressionAlgorithm algo = 1;
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repeated CompressedBlockInfo block_info = 2;
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bool zero_padding_enabled = 3;
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}
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message Lz4diffHeader {
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CompressionInfo src_info = 1;
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CompressionInfo dst_info = 2;
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InnerPatchType inner_type = 3;
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}
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