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ZCompressor.h

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#ifndef CLASSLIB_Z_COMPRESSOR_H
# define CLASSLIB_Z_COMPRESSOR_H

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

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

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

class ZCompressor : public Compressor, public ZConstants
{
public:
    // nowrap -> no zlib header, checksum
    ZCompressor (unsigned level = DEFAULT_COMPRESSION, bool wrap = false);
    ~ZCompressor (void);

    // Global compressor state
    virtual void        dictionary (void *buffer, IOSize length);
    virtual unsigned    level (void) const;
    virtual void        level (unsigned level);
    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);
    // virtual IOSize   rest (void) const;

    // Compression
    virtual bool        finished (void) const;
    virtual bool        flushed (void) const;
    virtual IOSize      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;      //< ZLIB state, null if not initialised
    int                 m_level;
    int                 m_strategy;
    int                 m_method;
    int                 m_window;
    int                 m_mem;
    bool                m_wrap;
    int                 m_action;
    int                 m_state;

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

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

} // namespace lat
#endif // CLASSLIB_Z_COMPRESSOR_H

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