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43 lines
1.0 KiB
C++
43 lines
1.0 KiB
C++
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// Copyright (c) 2005-2015 Jay Berkenbilt
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//
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// This file is part of qpdf. This software may be distributed under
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// the terms of version 2 of the Artistic License which may be found
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// in the source distribution. It is provided "as is" without express
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// or implied warranty.
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#ifndef __PL_RUNLENGTH_HH__
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#define __PL_RUNLENGTH_HH__
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#include <qpdf/Pipeline.hh>
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class Pl_RunLength: public Pipeline
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{
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public:
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enum action_e { a_encode, a_decode };
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QPDF_DLL
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Pl_RunLength(char const* identifier, Pipeline* next,
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action_e action);
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QPDF_DLL
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virtual ~Pl_RunLength();
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QPDF_DLL
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virtual void write(unsigned char* data, size_t len);
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QPDF_DLL
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virtual void finish();
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private:
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void encode(unsigned char* data, size_t len);
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void decode(unsigned char* data, size_t len);
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void flush_encode();
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enum state_e { st_top, st_copying, st_run };
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action_e action;
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state_e state;
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unsigned char buf[128];
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unsigned int length;
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};
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#endif // __PL_RUNLENGTH_HH__
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