Deflater.hxx

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#ifndef INCLUDED_PACKAGE_DEFLATER_HXX
#define INCLUDED_PACKAGE_DEFLATER_HXX
 
#include <com/sun/star/uno/Sequence.hxx>
#include <package/packagedllapi.hxx>
#include <memory>
 
struct z_stream_s;
 
namespace ZipUtils {
 
class DLLPUBLIC_PACKAGE Deflater final
{
    typedef struct z_stream_s z_stream;
 
    css::uno::Sequence< sal_Int8 > sInBuffer;
    bool                    bFinish;
    bool                    bFinished;
    sal_Int64               nOffset, nLength;
    // zlib total_in / total_out may be stored in 32bit, so they can overflow in case of 4gb files
    sal_uInt64              nTotalOut64, nTotalIn64; // save the overflowed value here.
    std::unique_ptr<z_stream> pStream;
 
    void init (sal_Int32 nLevel, bool bNowrap);
    sal_Int32 doDeflateBytes (css::uno::Sequence < sal_Int8 > &rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength);
 
public:
    ~Deflater();
    Deflater(sal_Int32 nSetLevel, bool bNowrap);
    void setInputSegment( const css::uno::Sequence< sal_Int8 >& rBuffer );
    bool needsInput() const;
    void finish(  );
    bool finished() const { return bFinished;}
    sal_Int32 doDeflateSegment( css::uno::Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewLength );
    sal_Int64 getTotalIn() const;
    sal_Int64 getTotalOut() const;
    void reset(  );
    void end(  );
};
 
}
 
#endif
 
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