2021-01-04 21:01:09 +00:00
|
|
|
// Copyright (c) 2005-2021 Jay Berkenbilt
|
2018-12-18 18:08:55 +00:00
|
|
|
//
|
|
|
|
// 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 QPDFNUMBERTREEOBJECTHELPER_HH
|
|
|
|
#define QPDFNUMBERTREEOBJECTHELPER_HH
|
|
|
|
|
|
|
|
#include <qpdf/QPDFObjectHelper.hh>
|
|
|
|
#include <qpdf/QPDFObjGen.hh>
|
|
|
|
#include <map>
|
2021-01-16 13:31:56 +00:00
|
|
|
#include <memory>
|
2018-12-18 18:08:55 +00:00
|
|
|
|
|
|
|
#include <qpdf/DLL.h>
|
|
|
|
|
|
|
|
// This is an object helper for number trees. See section 7.9.7 in the
|
2021-01-16 13:31:56 +00:00
|
|
|
// PDF spec (ISO 32000) for a description of number trees.
|
|
|
|
|
|
|
|
class NNTreeImpl;
|
2018-12-18 18:08:55 +00:00
|
|
|
|
|
|
|
class QPDFNumberTreeObjectHelper: public QPDFObjectHelper
|
|
|
|
{
|
|
|
|
public:
|
|
|
|
QPDF_DLL
|
|
|
|
QPDFNumberTreeObjectHelper(QPDFObjectHandle);
|
2018-12-21 13:19:52 +00:00
|
|
|
QPDF_DLL
|
|
|
|
virtual ~QPDFNumberTreeObjectHelper()
|
|
|
|
{
|
|
|
|
}
|
2018-12-18 18:08:55 +00:00
|
|
|
|
|
|
|
typedef long long int numtree_number;
|
|
|
|
|
|
|
|
// Return overall minimum and maximum indices
|
|
|
|
QPDF_DLL
|
|
|
|
numtree_number getMin();
|
|
|
|
QPDF_DLL
|
|
|
|
numtree_number getMax();
|
|
|
|
|
|
|
|
// Return whether the number tree has an explicit entry for this
|
|
|
|
// number.
|
|
|
|
QPDF_DLL
|
|
|
|
bool hasIndex(numtree_number idx);
|
|
|
|
|
|
|
|
// Find an object with a specific index. If found, returns true
|
|
|
|
// and initializes oh.
|
|
|
|
QPDF_DLL
|
|
|
|
bool findObject(numtree_number idx, QPDFObjectHandle& oh);
|
|
|
|
// Find the object at the index or, if not found, the object whose
|
|
|
|
// index is the highest index less than the requested index. If
|
|
|
|
// the requested index is less than the minimum, return false.
|
|
|
|
// Otherwise, return true, initialize oh to the object, and set
|
|
|
|
// offset to the difference between the requested index and the
|
|
|
|
// actual index. For example, if a number tree has values for 3
|
|
|
|
// and 6 and idx is 5, this method would return true, initialize
|
|
|
|
// oh to the value with index 3, and set offset to 2 (5 - 3).
|
|
|
|
QPDF_DLL
|
|
|
|
bool findObjectAtOrBelow(numtree_number idx, QPDFObjectHandle& oh,
|
|
|
|
numtree_number& offset);
|
|
|
|
|
2021-01-16 13:31:56 +00:00
|
|
|
// Return the contents of the number tree as a map. Note that
|
|
|
|
// number trees may be very large, so this may use a lot of RAM.
|
|
|
|
// It is more efficient to use QPDFNumberTreeObjectHelper's
|
|
|
|
// iterator.
|
2018-12-18 18:08:55 +00:00
|
|
|
typedef std::map<numtree_number, QPDFObjectHandle> idx_map;
|
|
|
|
QPDF_DLL
|
|
|
|
idx_map getAsMap() const;
|
|
|
|
|
|
|
|
private:
|
|
|
|
class Members
|
|
|
|
{
|
|
|
|
friend class QPDFNumberTreeObjectHelper;
|
|
|
|
typedef QPDFNumberTreeObjectHelper::numtree_number numtree_number;
|
|
|
|
|
|
|
|
public:
|
|
|
|
QPDF_DLL
|
|
|
|
~Members();
|
|
|
|
|
|
|
|
private:
|
2021-01-16 13:31:56 +00:00
|
|
|
Members(QPDFObjectHandle& oh);
|
|
|
|
Members(Members const&) = delete;
|
2018-12-18 18:08:55 +00:00
|
|
|
|
2021-01-16 13:31:56 +00:00
|
|
|
std::shared_ptr<NNTreeImpl> impl;
|
|
|
|
};
|
2018-12-18 18:08:55 +00:00
|
|
|
|
|
|
|
PointerHolder<Members> m;
|
|
|
|
};
|
|
|
|
|
|
|
|
#endif // QPDFNUMBERTREEOBJECTHELPER_HH
|