mirror of
https://github.com/qpdf/qpdf.git
synced 2024-11-02 19:49:43 +00:00
72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
// Copyright (c) 2005-2021 Jay Berkenbilt
|
|
//
|
|
// This file is part of qpdf.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
//
|
|
// Versions of qpdf prior to version 7 were released under the terms
|
|
// of version 2.0 of the Artistic License. At your option, you may
|
|
// continue to consider qpdf to be licensed under those terms. Please
|
|
// see the manual for additional information.
|
|
|
|
#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 };
|
|
|
|
class Members
|
|
{
|
|
friend class Pl_RunLength;
|
|
|
|
public:
|
|
QPDF_DLL
|
|
~Members();
|
|
|
|
private:
|
|
Members(action_e);
|
|
Members(Members const&);
|
|
|
|
action_e action;
|
|
state_e state;
|
|
unsigned char buf[128];
|
|
unsigned int length;
|
|
};
|
|
|
|
PointerHolder<Members> m;
|
|
};
|
|
|
|
#endif // PL_RUNLENGTH_HH
|