30 lines
1.3 KiB
C++
30 lines
1.3 KiB
C++
#pragma once
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#ifndef MESSMER_BLOCKSTORE_IMPLEMENTATIONS_COMPRESSING_COMPRESSORS_RUNLENGTHENCODING_H
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#define MESSMER_BLOCKSTORE_IMPLEMENTATIONS_COMPRESSING_COMPRESSORS_RUNLENGTHENCODING_H
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#include <cpp-utils/data/Data.h>
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namespace blockstore {
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namespace compressing {
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class RunLengthEncoding {
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public:
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static cpputils::Data Compress(const cpputils::Data &data);
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static cpputils::Data Decompress(const void *data, size_t size);
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private:
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static void _encodeArbitraryWords(uint8_t **current, uint8_t* end, std::ostringstream *output);
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static uint16_t _arbitraryRunLength(uint8_t *start, uint8_t* end);
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static void _encodeIdenticalWords(uint8_t **current, uint8_t* end, std::ostringstream *output);
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static uint16_t _countIdenticalBytes(uint8_t *start, uint8_t *end);
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static bool _hasData(std::istringstream *stream);
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static cpputils::Data _extractData(std::ostringstream *stream);
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static void _parseData(const uint8_t *data, size_t size, std::istringstream *result);
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static void _decodeArbitraryWords(std::istringstream *stream, std::ostringstream *decompressed);
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static void _decodeIdenticalWords(std::istringstream *stream, std::ostringstream *decompressed);
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};
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}
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}
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#endif
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