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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.
72 lines
1.8 KiB
C++
72 lines
1.8 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_RUNLENGTH_HH
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#define PL_RUNLENGTH_HH
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#include <qpdf/Pipeline.hh>
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class Pl_RunLength: public Pipeline
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{
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public:
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enum action_e { a_encode, a_decode };
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QPDF_DLL
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Pl_RunLength(char const* identifier, Pipeline* next,
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action_e action);
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QPDF_DLL
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virtual ~Pl_RunLength();
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QPDF_DLL
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virtual void write(unsigned char* data, size_t len);
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QPDF_DLL
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virtual void finish();
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private:
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void encode(unsigned char* data, size_t len);
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void decode(unsigned char* data, size_t len);
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void flush_encode();
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enum state_e { st_top, st_copying, st_run };
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class Members
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{
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friend class Pl_RunLength;
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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(action_e);
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Members(Members const&);
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action_e action;
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state_e state;
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unsigned char buf[128];
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unsigned int length;
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};
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PointerHolder<Members> m;
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};
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#endif // PL_RUNLENGTH_HH
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