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79f6b4823b
Have classes contain only a single private member of type PointerHolder<Members>. This makes it safe to change the structure of the Members class without breaking binary compatibility. Many of the classes already follow this pattern quite successfully. This brings in the rest of the class that are part of the public API.
80 lines
2.3 KiB
C++
80 lines
2.3 KiB
C++
// Copyright (c) 2005-2019 Jay Berkenbilt
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//
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// This file is part of qpdf.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Versions of qpdf prior to version 7 were released under the terms
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// of version 2.0 of the Artistic License. At your option, you may
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// continue to consider qpdf to be licensed under those terms. Please
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// see the manual for additional information.
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#ifndef PL_BUFFER_HH
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#define PL_BUFFER_HH
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// This pipeline accumulates the data passed to it into a memory
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// buffer. Each subsequent use of this buffer appends to the data
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// accumulated so far. getBuffer() may be called only after calling
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// finish() and before calling any subsequent write(). At that point,
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// a dynamically allocated Buffer object is returned and the internal
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// buffer is reset. The caller is responsible for deleting the
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// returned Buffer.
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//
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// For this pipeline, "next" may be null. If a next pointer is
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// provided, this pipeline will also pass the data through to it.
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#include <qpdf/Pipeline.hh>
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#include <qpdf/PointerHolder.hh>
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#include <qpdf/Buffer.hh>
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class Pl_Buffer: public Pipeline
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{
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public:
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QPDF_DLL
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Pl_Buffer(char const* identifier, Pipeline* next = 0);
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QPDF_DLL
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virtual ~Pl_Buffer();
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QPDF_DLL
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virtual void write(unsigned char*, size_t);
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QPDF_DLL
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virtual void finish();
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// Each call to getBuffer() resets this object -- see notes above.
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// The caller is responsible for deleting the returned Buffer
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// object.
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QPDF_DLL
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Buffer* getBuffer();
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private:
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class Members
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{
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friend class Pl_Buffer;
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public:
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QPDF_DLL
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~Members();
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private:
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Members();
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Members(Members const&);
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bool ready;
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PointerHolder<Buffer> data;
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size_t total_size;
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};
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PointerHolder<Members> m;
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};
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#endif // PL_BUFFER_HH
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