Mercurial > hg > orthanc

annotate OrthancFramework/Sources/DicomParsing/ParsedDicomDir.cpp @ 4044:d25f4c0fa160 framework

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splitting code into OrthancFramework and OrthancServer
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 10 Jun 2020 20:30:34 +0200
parents Core/DicomParsing/ParsedDicomDir.cpp@2a170a8f1faf
children bf7b9edf6b81
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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32
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33
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34 #include "../PrecompiledHeaders.h"
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35 #include "ParsedDicomDir.h"
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36
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37 #include "../Compatibility.h"
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38 #include "../OrthancException.h"
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39 #include "ParsedDicomFile.h"
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40 #include "FromDcmtkBridge.h"
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41
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42 #include <dcmtk/dcmdata/dcdeftag.h>
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43
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44
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45 namespace Orthanc
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46 {
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47 void ParsedDicomDir::Clear()
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48 {
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49 for (size_t i = 0; i < content_.size(); i++)
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50 {
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51 assert(content_[i] != NULL);
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52 delete content_[i];
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53 }
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54 }
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55
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56
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57 bool ParsedDicomDir::LookupIndexOfOffset(size_t& target,
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58 unsigned int offset) const
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59 {
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60 if (offset == 0)
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61 {
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62 return false;
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63 }
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64
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65 OffsetToIndex::const_iterator found = offsetToIndex_.find(offset);
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66 if (found == offsetToIndex_.end())
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67 {
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68 // Error in the algorithm that computes the offsets
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69 throw OrthancException(ErrorCode_InternalError);
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70 }
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71 else
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72 {
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73 target = found->second;
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74 return true;
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75 }
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76 }
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77
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78
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79 ParsedDicomDir::ParsedDicomDir(const std::string content)
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80 {
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81 ParsedDicomFile dicom(content);
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82
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83 DcmSequenceOfItems* sequence = NULL;
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84 if (dicom.GetDcmtkObject().getDataset() == NULL ||
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85 !dicom.GetDcmtkObject().getDataset()->findAndGetSequence(DCM_DirectoryRecordSequence, sequence).good() ||
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86 sequence == NULL)
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87 {
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88 throw OrthancException(ErrorCode_BadFileFormat, "Not a DICOMDIR");
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89 }
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90
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91 content_.resize(sequence->card());
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92 nextOffsets_.resize(content_.size());
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93 lowerOffsets_.resize(content_.size());
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94
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95 // Manually reconstruct the list of all the available offsets of
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96 // "DcmItem", as "fStartPosition" is a protected member in DCMTK
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97 // API
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98 std::set<uint32_t> availableOffsets;
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99 availableOffsets.insert(0);
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100
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101
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102 for (unsigned long i = 0; i < sequence->card(); i++)
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103 {
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104 DcmItem* item = sequence->getItem(i);
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105 if (item == NULL)
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106 {
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107 Clear();
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108 throw OrthancException(ErrorCode_InternalError);
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109 }
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110
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111 Uint32 next, lower;
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112 if (!item->findAndGetUint32(DCM_OffsetOfTheNextDirectoryRecord, next).good() ||
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113 !item->findAndGetUint32(DCM_OffsetOfReferencedLowerLevelDirectoryEntity, lower).good())
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114 {
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115 item->writeXML(std::cout);
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116 throw OrthancException(ErrorCode_BadFileFormat,
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117 "Missing offsets in DICOMDIR");
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118 }
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119
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120 nextOffsets_[i] = next;
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121 lowerOffsets_[i] = lower;
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122
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123 std::unique_ptr<DicomMap> entry(new DicomMap);
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124 FromDcmtkBridge::ExtractDicomSummary(*entry, *item);
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125
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126 if (next != 0)
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127 {
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128 availableOffsets.insert(next);
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129 }
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130
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131 if (lower != 0)
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132 {
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133 availableOffsets.insert(lower);
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134 }
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135
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136 content_[i] = entry.release();
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137 }
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138
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139 if (content_.size() != availableOffsets.size())
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140 {
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141 throw OrthancException(ErrorCode_BadFileFormat,
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142 "Inconsistent offsets in DICOMDIR");
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143 }
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144
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145 unsigned int index = 0;
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146 for (std::set<uint32_t>::const_iterator it = availableOffsets.begin();
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147 it != availableOffsets.end(); ++it)
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148 {
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149 offsetToIndex_[*it] = index;
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150 index ++;
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151 }
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152 }
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153
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154
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155 const DicomMap& ParsedDicomDir::GetItem(size_t i) const
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156 {
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157 if (i >= content_.size())
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158 {
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159 throw OrthancException(ErrorCode_ParameterOutOfRange);
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160 }
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161 else
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162 {
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163 assert(content_[i] != NULL);
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164 return *content_[i];
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165 }
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166 }
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167
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168
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169 bool ParsedDicomDir::LookupNext(size_t& target,
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170 size_t index) const
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171 {
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172 if (index >= nextOffsets_.size())
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173 {
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174 throw OrthancException(ErrorCode_ParameterOutOfRange);
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175 }
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176 else
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177 {
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178 return LookupIndexOfOffset(target, nextOffsets_[index]);
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179 }
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180 }
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181
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182
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183 bool ParsedDicomDir::LookupLower(size_t& target,
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184 size_t index) const
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185 {
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186 if (index >= lowerOffsets_.size())
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187 {
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188 throw OrthancException(ErrorCode_ParameterOutOfRange);
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189 }
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190 else
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191 {
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192 return LookupIndexOfOffset(target, lowerOffsets_[index]);
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193 }
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194 }
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195 }