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55 lines
1.7 KiB
55 lines
1.7 KiB
//
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// Copyright (C) 2016 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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#include "update_engine/payload_generator/xz.h"
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#include <base/logging.h>
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#include <lzma.h>
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namespace chromeos_update_engine {
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void XzCompressInit() {}
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bool XzCompress(const brillo::Blob& in, brillo::Blob* out) {
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out->clear();
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if (in.empty())
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return true;
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// Resize the output buffer to get enough memory for writing the compressed
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// data.
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out->resize(lzma_stream_buffer_bound(in.size()));
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const uint32_t kLzmaPreset = 6;
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size_t out_pos = 0;
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int rc = lzma_easy_buffer_encode(kLzmaPreset,
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LZMA_CHECK_NONE, // We do not need CRC.
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nullptr,
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in.data(),
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in.size(),
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out->data(),
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&out_pos,
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out->size());
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if (rc != LZMA_OK) {
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LOG(ERROR) << "Failed to compress data to LZMA stream with return code: "
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<< rc;
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return false;
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}
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out->resize(out_pos);
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return true;
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}
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} // namespace chromeos_update_engine
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