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// Copyright (c) 2005-2017 Jay Berkenbilt
//
// This file is part of qpdf. This software may be distributed under
// the terms of version 2 of the Artistic License which may be found
// in the source distribution. It is provided "as is" without express
// or implied warranty.
#ifndef __PL_RUNLENGTH_HH__
#define __PL_RUNLENGTH_HH__
#include <qpdf/Pipeline.hh>
class Pl_RunLength: public Pipeline
{
public:
enum action_e { a_encode, a_decode };
QPDF_DLL
Pl_RunLength(char const* identifier, Pipeline* next,
action_e action);
QPDF_DLL
virtual ~Pl_RunLength();
QPDF_DLL
virtual void write(unsigned char* data, size_t len);
QPDF_DLL
virtual void finish();
private:
void encode(unsigned char* data, size_t len);
void decode(unsigned char* data, size_t len);
void flush_encode();
enum state_e { st_top, st_copying, st_run };
action_e action;
state_e state;
unsigned char buf[128];
unsigned int length;
};
#endif // __PL_RUNLENGTH_HH__
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