mirror of https://github.com/qpdf/qpdf.git
72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
// Copyright (c) 2005-2024 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"); you may not use this file except
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// in compliance with the License. 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 distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under
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// the License.
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//
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// Versions of qpdf prior to version 7 were released under the terms of version 2.0 of the Artistic
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// License. At your option, you may continue to consider qpdf to be licensed under those terms.
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// Please see the manual for additional information.
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#ifndef QPDFXREFENTRY_HH
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#define QPDFXREFENTRY_HH
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#include <qpdf/DLL.h>
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#include <qpdf/Types.h>
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class QPDFXRefEntry
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{
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public:
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// Type constants are from the PDF spec section "Cross-Reference Streams":
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// 0 = free entry; not used
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// 1 = "uncompressed"; field 1 = offset
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// 2 = "compressed"; field 1 = object stream number, field 2 = index
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// Create a type 0 "free" entry.
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QPDF_DLL
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QPDFXRefEntry();
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QPDF_DLL
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QPDFXRefEntry(int type, qpdf_offset_t field1, int field2);
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// Create a type 1 "uncompressed" entry.
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QPDF_DLL
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QPDFXRefEntry(qpdf_offset_t offset) :
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type(1),
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field1(offset)
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{
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}
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// Create a type 2 "compressed" entry.
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QPDF_DLL
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QPDFXRefEntry(int stream_number, int index) :
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type(2),
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field1(stream_number),
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field2(index)
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{
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}
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QPDF_DLL
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int getType() const;
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QPDF_DLL
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qpdf_offset_t getOffset() const; // only for type 1
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QPDF_DLL
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int getObjStreamNumber() const; // only for type 2
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QPDF_DLL
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int getObjStreamIndex() const; // only for type 2
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private:
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// This class does not use the Members pattern to avoid a memory allocation for every one of
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// these. A lot of these get created.
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int type{0};
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qpdf_offset_t field1{0};
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int field2{0};
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};
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#endif // QPDFXREFENTRY_HH
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