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