---

BZCompressor.h

Go to the documentation of this file.

#ifndef CLASSLIB_BZ_COMPRESSOR_H
# define CLASSLIB_BZ_COMPRESSOR_H

//<<<<<< INCLUDES                                                       >>>>>>

# include "classlib/zip/Compressor.h"
# include "classlib/zip/BZConstants.h"

namespace lat {
//<<<<<< PUBLIC DEFINES                                                 >>>>>>
//<<<<<< PUBLIC CONSTANTS                                               >>>>>>
//<<<<<< PUBLIC TYPES                                                   >>>>>>
//<<<<<< PUBLIC VARIABLES                                               >>>>>>
//<<<<<< PUBLIC FUNCTIONS                                               >>>>>>
//<<<<<< CLASS DECLARATIONS                                             >>>>>>

class BZCompressor : public Compressor, public BZConstants
{
public:
    BZCompressor (unsigned level = DEFAULT_COMPRESSION,
                  unsigned workFactor = DEFAULT_WORK_FACTOR);
    ~BZCompressor (void);

    // Global compressor state
    virtual void        level (unsigned level);
    virtual unsigned    level (void) const;
    virtual void        workFactor (unsigned value);
    virtual unsigned    workFactor (void) const;
    virtual void        reset (void);
    virtual void        end (void);

    // Input management
    virtual bool        more (void) const;
    virtual void        input (const void *buffer, IOSize length);
    virtual void        finish (void);
    virtual void        flush (void);

    // Compression
    virtual bool        finished (void) const;
    virtual bool        flushed (void) const;
    virtual size_t      compress (void *into, IOSize length);

    // Statistics
    virtual unsigned    checksum (void) const;
    virtual IOOffset    in (void) const;
    virtual IOOffset    out (void) const;

private:
    struct Stream;
    Stream              *m_stream;      //< BZLIB state
    unsigned            m_level;        //< Compression blocking factor
    unsigned            m_workFactor;   //< Compression work factor
    unsigned            m_checksum;     //< CRC-32 checksum of input
    int                 m_action;       //< Next BZLIB compression action
    int                 m_state;        //< BZLIB state from last compression

    // undefined, no semantics
    BZCompressor (const BZCompressor &other);
    BZCompressor &operator= (const BZCompressor &other);
};

//<<<<<< INLINE PUBLIC FUNCTIONS                                        >>>>>>
//<<<<<< INLINE MEMBER FUNCTIONS                                        >>>>>>

} // namespace lat
#endif // CLASSLIB_BZ_COMPRESSOR_H

---