chromium/chrome/services/file_util/single_file_tar_xz_file_extractor.cc

// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "chrome/services/file_util/single_file_tar_xz_file_extractor.h"

#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>

#include <algorithm>
#include <utility>
#include <vector>

#include "base/containers/span.h"
#include "base/numerics/safe_conversions.h"
#include "chrome/services/file_util/public/mojom/constants.mojom.h"
#include "chrome/services/file_util/single_file_tar_reader.h"
#include "third_party/lzma_sdk/C/7zCrc.h"
#include "third_party/lzma_sdk/C/Xz.h"
#include "third_party/lzma_sdk/C/XzCrc64.h"

namespace {

constexpr int kDefaultBufferSize = …;
constexpr int kXzBufferSize = …;
constexpr int kTarBufferSize = …;

// ExtractorInner extracts a .TAR.XZ file and writes the extracted data to the
// output file.
class ExtractorInner { … };

}  // namespace

SingleFileTarXzFileExtractor::SingleFileTarXzFileExtractor() { … }

SingleFileTarXzFileExtractor::~SingleFileTarXzFileExtractor() = default;

void SingleFileTarXzFileExtractor::Extract(
    base::File src_file,
    base::File dst_file,
    mojo::PendingRemote<chrome::mojom::SingleFileExtractorListener>
        pending_listener,
    SingleFileExtractor::ExtractCallback callback) { … }