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// Copyright (c) 2005-2023 Jay Berkenbilt
//
// This file is part of qpdf.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Versions of qpdf prior to version 7 were released under the terms
// of version 2.0 of the Artistic License. At your option, you may
// continue to consider qpdf to be licensed under those terms. Please
// see the manual for additional information.
#ifndef QPDFOBJGEN_HH
#define QPDFOBJGEN_HH
#include <qpdf/DLL.h>
#include <iostream>
// This class represents an object ID and generation pair. It is
// suitable to use as a key in a map or set.
class QPDFObjGen
{
public:
QPDF_DLL
QPDFObjGen() :
obj(0),
gen(0)
{
}
QPDF_DLL
explicit QPDFObjGen(int obj, int gen) :
obj(obj),
gen(gen)
{
}
QPDF_DLL
bool
operator<(QPDFObjGen const& rhs) const
{
return (obj < rhs.obj) || ((obj == rhs.obj) && (gen < rhs.gen));
}
QPDF_DLL
bool
operator==(QPDFObjGen const& rhs) const
{
return (obj == rhs.obj) && (gen == rhs.gen);
}
QPDF_DLL
bool
operator!=(QPDFObjGen const& rhs) const
{
return (obj != rhs.obj) || (gen != rhs.gen);
}
QPDF_DLL
int
getObj() const
{
return obj;
}
QPDF_DLL
int
getGen() const
{
return gen;
}
QPDF_DLL
bool
isIndirect() const
{
return obj != 0;
}
QPDF_DLL
std::string unparse(char separator = ',') const;
QPDF_DLL
friend std::ostream& operator<<(std::ostream& os, const QPDFObjGen& og);
private:
// This class does not use the Members pattern to avoid a memory
// allocation for every one of these. A lot of these get created
// and destroyed.
int obj;
int gen;
};
#endif // QPDFOBJGEN_HH
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