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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.
73 lines
2.0 KiB
C++
73 lines
2.0 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_COUNT_HH
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#define PL_COUNT_HH
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// This pipeline is reusable; i.e., it is safe to call write() after
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// calling finish().
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#include <qpdf/Types.h>
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#include <qpdf/Pipeline.hh>
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class Pl_Count: public Pipeline
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{
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public:
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QPDF_DLL
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Pl_Count(char const* identifier, Pipeline* next);
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QPDF_DLL
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virtual ~Pl_Count();
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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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// Returns the number of bytes written
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QPDF_DLL
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qpdf_offset_t getCount() const;
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// Returns the last character written, or '\0' if no characters
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// have been written (in which case getCount() returns 0)
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QPDF_DLL
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unsigned char getLastChar() const;
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private:
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class Members
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{
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friend class Pl_Count;
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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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// Must be qpdf_offset_t, not size_t, to handle writing more than
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// size_t can handle.
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qpdf_offset_t count;
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unsigned char last_char;
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};
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PointerHolder<Members> m;
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};
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#endif // PL_COUNT_HH
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