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// Copyright 2016 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fpdfdoc/cpdf_numbertree.h"
#include "core/fpdfapi/fpdf_parser/cpdf_array.h"
#include "core/fpdfapi/fpdf_parser/cpdf_dictionary.h"
namespace {
CPDF_Object* SearchNumberNode(const CPDF_Dictionary* pNode, int num) {
CPDF_Array* pLimits = pNode->GetArrayFor("Limits");
if (pLimits &&
(num < pLimits->GetIntegerAt(0) || num > pLimits->GetIntegerAt(1))) {
return nullptr;
}
CPDF_Array* pNumbers = pNode->GetArrayFor("Nums");
if (pNumbers) {
for (size_t i = 0; i < pNumbers->GetCount() / 2; i++) {
int index = pNumbers->GetIntegerAt(i * 2);
if (num == index)
return pNumbers->GetDirectObjectAt(i * 2 + 1);
if (index > num)
break;
}
return nullptr;
}
CPDF_Array* pKids = pNode->GetArrayFor("Kids");
if (!pKids)
return nullptr;
for (size_t i = 0; i < pKids->GetCount(); i++) {
CPDF_Dictionary* pKid = pKids->GetDictAt(i);
if (!pKid)
continue;
CPDF_Object* pFound = SearchNumberNode(pKid, num);
if (pFound)
return pFound;
}
return nullptr;
}
} // namespace
CPDF_Object* CPDF_NumberTree::LookupValue(int num) const {
return SearchNumberNode(m_pRoot, num);
}
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