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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.
109 lines
2.9 KiB
C++
109 lines
2.9 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 QPDF_INPUTSOURCE_HH
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#define QPDF_INPUTSOURCE_HH
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#include <qpdf/DLL.h>
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#include <qpdf/Types.h>
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#include <qpdf/PointerHolder.hh>
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#include <stdio.h>
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#include <string>
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class QPDF_DLL_CLASS InputSource
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{
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public:
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QPDF_DLL
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InputSource() :
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last_offset(0)
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{
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}
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QPDF_DLL
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virtual ~InputSource()
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{
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}
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class QPDF_DLL_CLASS Finder
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{
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public:
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Finder()
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{
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}
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virtual ~Finder()
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{
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}
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virtual bool check() = 0;
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};
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QPDF_DLL
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void setLastOffset(qpdf_offset_t);
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QPDF_DLL
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qpdf_offset_t getLastOffset() const;
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QPDF_DLL
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std::string readLine(size_t max_line_length);
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// Find first or last occurrence of a sequence of characters
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// starting within the range defined by offset and len such that,
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// when the input source is positioned at the beginning of that
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// sequence, finder.check() returns true. If len is 0, the search
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// proceeds until EOF. If a qualifying pattern is found, these
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// methods return true and leave the input source positioned
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// wherever check() left it at the end of the matching pattern.
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QPDF_DLL
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bool findFirst(char const* start_chars,
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qpdf_offset_t offset, size_t len,
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Finder& finder);
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QPDF_DLL
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bool findLast(char const* start_chars,
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qpdf_offset_t offset, size_t len,
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Finder& finder);
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virtual qpdf_offset_t findAndSkipNextEOL() = 0;
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virtual std::string const& getName() const = 0;
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virtual qpdf_offset_t tell() = 0;
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virtual void seek(qpdf_offset_t offset, int whence) = 0;
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virtual void rewind() = 0;
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virtual size_t read(char* buffer, size_t length) = 0;
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virtual void unreadCh(char ch) = 0;
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protected:
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qpdf_offset_t last_offset;
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private:
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class Members
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{
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friend class InputSource;
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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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};
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PointerHolder<Members> m;
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};
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#endif // QPDF_INPUTSOURCE_HH
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