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58 lines
2.1 KiB
58 lines
2.1 KiB
#ifndef CRYPTOPP_ZLIB_H |
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#define CRYPTOPP_ZLIB_H |
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#include "adler32.h" |
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#include "zdeflate.h" |
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#include "zinflate.h" |
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NAMESPACE_BEGIN(CryptoPP) |
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/// ZLIB Compressor (RFC 1950) |
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class ZlibCompressor : public Deflator |
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{ |
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public: |
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ZlibCompressor(BufferedTransformation *attachment=NULL, unsigned int deflateLevel=DEFAULT_DEFLATE_LEVEL, unsigned int log2WindowSize=DEFAULT_LOG2_WINDOW_SIZE, bool detectUncompressible=true) |
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: Deflator(attachment, deflateLevel, log2WindowSize, detectUncompressible) {} |
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ZlibCompressor(const NameValuePairs ¶meters, BufferedTransformation *attachment=NULL) |
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: Deflator(parameters, attachment) {} |
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unsigned int GetCompressionLevel() const; |
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protected: |
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void WritePrestreamHeader(); |
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void ProcessUncompressedData(const byte *string, size_t length); |
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void WritePoststreamTail(); |
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Adler32 m_adler32; |
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}; |
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/// ZLIB Decompressor (RFC 1950) |
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class ZlibDecompressor : public Inflator |
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{ |
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public: |
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typedef Inflator::Err Err; |
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class HeaderErr : public Err {public: HeaderErr() : Err(INVALID_DATA_FORMAT, "ZlibDecompressor: header decoding error") {}}; |
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class Adler32Err : public Err {public: Adler32Err() : Err(DATA_INTEGRITY_CHECK_FAILED, "ZlibDecompressor: ADLER32 check error") {}}; |
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class UnsupportedAlgorithm : public Err {public: UnsupportedAlgorithm() : Err(INVALID_DATA_FORMAT, "ZlibDecompressor: unsupported algorithm") {}}; |
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class UnsupportedPresetDictionary : public Err {public: UnsupportedPresetDictionary() : Err(INVALID_DATA_FORMAT, "ZlibDecompressor: unsupported preset dictionary") {}}; |
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/*! \param repeat decompress multiple compressed streams in series |
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\param autoSignalPropagation 0 to turn off MessageEnd signal |
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*/ |
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ZlibDecompressor(BufferedTransformation *attachment = NULL, bool repeat = false, int autoSignalPropagation = -1); |
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unsigned int GetLog2WindowSize() const {return m_log2WindowSize;} |
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private: |
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unsigned int MaxPrestreamHeaderSize() const {return 2;} |
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void ProcessPrestreamHeader(); |
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void ProcessDecompressedData(const byte *string, size_t length); |
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unsigned int MaxPoststreamTailSize() const {return 4;} |
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void ProcessPoststreamTail(); |
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unsigned int m_log2WindowSize; |
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Adler32 m_adler32; |
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}; |
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NAMESPACE_END |
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#endif
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