zlib.h
#ifndef CRYPTOPP_ZLIB_H
#define CRYPTOPP_ZLIB_H
#include "adler32.h"
#include "zdeflate.h"
#include "zinflate.h"
NAMESPACE_BEGIN(CryptoPP)
/// ZLIB Compressor (RFC 1950)
class ZlibCompressor : public Deflator
{
public:
ZlibCompressor(BufferedTransformation *attachment=NULL, unsigned int deflateLevel=DEFAULT_DEFLATE_LEVEL, unsigned int log2WindowSize=DEFAULT_LOG2_WINDOW_SIZE, bool detectUncompressible=true)
: Deflator(attachment, deflateLevel, log2WindowSize, detectUncompressible) {}
ZlibCompressor(const NameValuePairs &parameters, BufferedTransformation *attachment=NULL)
: Deflator(parameters, attachment) {}
unsigned int GetCompressionLevel() const;
protected:
void WritePrestreamHeader();
void ProcessUncompressedData(const byte *string, size_t length);
void WritePoststreamTail();
Adler32 m_adler32;
};
/// ZLIB Decompressor (RFC 1950)
class ZlibDecompressor : public Inflator
{
public:
typedef Inflator::Err Err;
class HeaderErr : public Err {public: HeaderErr() : Err(INVALID_DATA_FORMAT, "ZlibDecompressor: header decoding error") {}};
class Adler32Err : public Err {public: Adler32Err() : Err(DATA_INTEGRITY_CHECK_FAILED, "ZlibDecompressor: ADLER32 check error") {}};
class UnsupportedAlgorithm : public Err {public: UnsupportedAlgorithm() : Err(INVALID_DATA_FORMAT, "ZlibDecompressor: unsupported algorithm") {}};
class UnsupportedPresetDictionary : public Err {public: UnsupportedPresetDictionary() : Err(INVALID_DATA_FORMAT, "ZlibDecompressor: unsupported preset dictionary") {}};
/*! \param repeat decompress multiple compressed streams in series
\param autoSignalPropagation 0 to turn off MessageEnd signal
*/
ZlibDecompressor(BufferedTransformation *attachment = NULL, bool repeat = false, int autoSignalPropagation = -1);
unsigned int GetLog2WindowSize() const {return m_log2WindowSize;}
private:
unsigned int MaxPrestreamHeaderSize() const {return 2;}
void ProcessPrestreamHeader();
void ProcessDecompressedData(const byte *string, size_t length);
unsigned int MaxPoststreamTailSize() const {return 4;}
void ProcessPoststreamTail();
unsigned int m_log2WindowSize;
Adler32 m_adler32;
};
NAMESPACE_END
#endif
ZlibDecompressor::ZlibDecompressor
ZlibDecompressor(BufferedTransformation *attachment=NULL, bool repeat=false, int autoSignalPropagation=-1)
ZlibDecompressor::Adler32Err
Definition: zlib.h:35
Deflator
DEFLATE (RFC 1951) compressor.
Definition: zdeflate.h:55
ZlibDecompressor::UnsupportedAlgorithm
Definition: zlib.h:36
Inflator::Err
Definition: zinflate.h:88
BufferedTransformation
interface for buffered transformations
Definition: cryptlib.h:770
Exception::DATA_INTEGRITY_CHECK_FAILED
data integerity check (such as CRC or MAC) failed
Definition: cryptlib.h:121
Adler32
ADLER-32 checksum calculations.
Definition: adler32.h:9
Exception::INVALID_DATA_FORMAT
received input data that doesn&#39;t conform to expected format
Definition: cryptlib.h:123
ZlibCompressor
ZLIB Compressor (RFC 1950)
Definition: zlib.h:11
ZlibDecompressor::HeaderErr
Definition: zlib.h:34
ZlibDecompressor
ZLIB Decompressor (RFC 1950)
Definition: zlib.h:30
Inflator
DEFLATE (RFC 1951) decompressor.
Definition: zinflate.h:85
ZlibDecompressor::UnsupportedPresetDictionary
Definition: zlib.h:37
NameValuePairs
interface for retrieving values given their names
Definition: cryptlib.h:224