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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_BUFFER_HH__
#define __PL_BUFFER_HH__
// This pipeline accumulates the data passed to it into a memory
// buffer. Each subsequent use of this buffer appends to the data
// accumulated so far. getBuffer() may be called only after calling
// finish() and before calling any subsequent write(). At that point,
// a dynamically allocated Buffer object is returned and the internal
// buffer is reset. The caller is responsible for deleting the
// returned Buffer.
//
// For this pipeline, "next" may be null. If a next pointer is
// provided, this pipeline will also pass the data through to it.
#include <qpdf/Pipeline.hh>
#include <qpdf/PointerHolder.hh>
#include <qpdf/Buffer.hh>
#include <list>
class Pl_Buffer: public Pipeline
{
public:
QPDF_DLL
Pl_Buffer(char const* identifier, Pipeline* next = 0);
QPDF_DLL
virtual ~Pl_Buffer();
QPDF_DLL
virtual void write(unsigned char*, size_t);
QPDF_DLL
virtual void finish();
// Each call to getBuffer() resets this object -- see notes above.
// The caller is responsible for deleting the returned Buffer
// object.
QPDF_DLL
Buffer* getBuffer();
private:
bool ready;
std::list<PointerHolder<Buffer> > data;
size_t total_size;
};
#endif // __PL_BUFFER_HH__
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