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83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/* vim:set ts=2 sw=2 sts=2 et: */
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/**
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* \author Marcus Holland-Moritz (github@mhxnet.de)
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* \copyright Copyright (c) Marcus Holland-Moritz
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*
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* This file is part of dwarfs.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the “Software”), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* SPDX-License-Identifier: MIT
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*/
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#pragma once
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#include <cstdint>
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#include <cstdio>
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#include <memory>
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#include <optional>
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#include <set>
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#include <span>
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#include <string>
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#include <string_view>
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#include <dwarfs/byte_buffer.h>
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#include <dwarfs/byte_buffer_factory.h>
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#include <dwarfs/compression.h>
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namespace dwarfs {
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class block_decompressor {
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public:
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block_decompressor(compression_type type, std::span<uint8_t const> data);
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shared_byte_buffer start_decompression(mutable_byte_buffer target);
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shared_byte_buffer start_decompression(byte_buffer_factory const& bbf);
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bool decompress_frame(size_t frame_size = BUFSIZ) {
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return impl_->decompress_frame(frame_size);
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}
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size_t uncompressed_size() const { return impl_->uncompressed_size(); }
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compression_type type() const { return impl_->type(); }
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std::optional<std::string> metadata() const { return impl_->metadata(); }
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static shared_byte_buffer
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decompress(compression_type type, std::span<uint8_t const> data);
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class impl {
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public:
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virtual ~impl() = default;
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virtual void start_decompression(mutable_byte_buffer target) = 0;
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virtual bool decompress_frame(size_t frame_size) = 0;
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virtual size_t uncompressed_size() const = 0;
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virtual std::optional<std::string> metadata() const = 0;
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virtual compression_type type() const = 0;
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};
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private:
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std::unique_ptr<impl> impl_;
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};
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} // namespace dwarfs
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