Pl_Flate.hh
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// Copyright (c) 2005-2018 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_FLATE_HH__
#define __PL_FLATE_HH__
#include <qpdf/Pipeline.hh>
class Pl_Flate: public Pipeline
{
public:
static int const def_bufsize = 65536;
enum action_e { a_inflate, a_deflate };
QPDF_DLL
Pl_Flate(char const* identifier, Pipeline* next,
action_e action, int out_bufsize = def_bufsize);
QPDF_DLL
virtual ~Pl_Flate();
QPDF_DLL
virtual void write(unsigned char* data, size_t len);
QPDF_DLL
virtual void finish();
private:
void handleData(unsigned char* data, int len, int flush);
void checkError(char const* prefix, int error_code);
unsigned char* outbuf;
int out_bufsize;
action_e action;
bool initialized;
void* zdata;
};
#endif // __PL_FLATE_HH__