Mercurial > hg > orthanc

annotate Core/DicomParsing/ParsedDicomDir.cpp @ 3640:94f4a18a79cc

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upgrade to year 2020
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 31 Jan 2020 17:14:59 +0100
parents 99cd59fe8c5c
children 2a170a8f1faf
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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 "../OrthancException.h"
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38 #include "ParsedDicomFile.h"
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39 #include "FromDcmtkBridge.h"
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40
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41 #include <dcmtk/dcmdata/dcdeftag.h>
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42
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43
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44 namespace Orthanc
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45 {
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46 void ParsedDicomDir::Clear()
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47 {
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48 for (size_t i = 0; i < content_.size(); i++)
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49 {
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50 assert(content_[i] != NULL);
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51 delete content_[i];
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52 }
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53 }
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56 bool ParsedDicomDir::LookupIndexOfOffset(size_t& target,
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57 unsigned int offset) const
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58 {
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59 if (offset == 0)
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60 {
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61 return false;
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62 }
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63
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64 OffsetToIndex::const_iterator found = offsetToIndex_.find(offset);
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65 if (found == offsetToIndex_.end())
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66 {
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67 // Error in the algorithm that computes the offsets
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68 throw OrthancException(ErrorCode_InternalError);
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69 }
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70 else
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71 {
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72 target = found->second;
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73 return true;
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74 }
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75 }
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76
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77
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78 ParsedDicomDir::ParsedDicomDir(const std::string content)
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79 {
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80 ParsedDicomFile dicom(content);
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81
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82 DcmSequenceOfItems* sequence = NULL;
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83 if (dicom.GetDcmtkObject().getDataset() == NULL ||
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84 !dicom.GetDcmtkObject().getDataset()->findAndGetSequence(DCM_DirectoryRecordSequence, sequence).good() ||
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85 sequence == NULL)
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86 {
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87 throw OrthancException(ErrorCode_BadFileFormat, "Not a DICOMDIR");
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88 }
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89
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90 content_.resize(sequence->card());
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91 nextOffsets_.resize(content_.size());
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92 lowerOffsets_.resize(content_.size());
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93
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94 // Manually reconstruct the list of all the available offsets of
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95 // "DcmItem", as "fStartPosition" is a protected member in DCMTK
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96 // API
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97 std::set<uint32_t> availableOffsets;
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98 availableOffsets.insert(0);
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99
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100
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101 for (unsigned long i = 0; i < sequence->card(); i++)
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102 {
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103 DcmItem* item = sequence->getItem(i);
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104 if (item == NULL)
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105 {
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106 Clear();
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107 throw OrthancException(ErrorCode_InternalError);
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108 }
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109
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110 Uint32 next, lower;
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111 if (!item->findAndGetUint32(DCM_OffsetOfTheNextDirectoryRecord, next).good() ||
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112 !item->findAndGetUint32(DCM_OffsetOfReferencedLowerLevelDirectoryEntity, lower).good())
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113 {
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114 item->writeXML(std::cout);
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115 throw OrthancException(ErrorCode_BadFileFormat,
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116 "Missing offsets in DICOMDIR");
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117 }
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118
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119 nextOffsets_[i] = next;
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120 lowerOffsets_[i] = lower;
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121
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122 std::auto_ptr<DicomMap> entry(new DicomMap);
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123 FromDcmtkBridge::ExtractDicomSummary(*entry, *item);
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124
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125 if (next != 0)
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126 {
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127 availableOffsets.insert(next);
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128 }
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129
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130 if (lower != 0)
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131 {
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132 availableOffsets.insert(lower);
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133 }
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134
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135 content_[i] = entry.release();
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136 }
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137
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138 if (content_.size() != availableOffsets.size())
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139 {
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140 throw OrthancException(ErrorCode_BadFileFormat,
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141 "Inconsistent offsets in DICOMDIR");
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142 }
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143
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144 unsigned int index = 0;
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145 for (std::set<uint32_t>::const_iterator it = availableOffsets.begin();
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146 it != availableOffsets.end(); ++it)
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147 {
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148 offsetToIndex_[*it] = index;
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149 index ++;
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150 }
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151 }
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152
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153
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154 const DicomMap& ParsedDicomDir::GetItem(size_t i) const
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155 {
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156 if (i >= content_.size())
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157 {
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158 throw OrthancException(ErrorCode_ParameterOutOfRange);
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159 }
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160 else
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161 {
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162 assert(content_[i] != NULL);
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163 return *content_[i];
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164 }
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165 }
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166
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167
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168 bool ParsedDicomDir::LookupNext(size_t& target,
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169 size_t index) const
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170 {
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171 if (index >= nextOffsets_.size())
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172 {
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173 throw OrthancException(ErrorCode_ParameterOutOfRange);
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174 }
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175 else
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176 {
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177 return LookupIndexOfOffset(target, nextOffsets_[index]);
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178 }
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179 }
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180
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181
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182 bool ParsedDicomDir::LookupLower(size_t& target,
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183 size_t index) const
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184 {
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185 if (index >= lowerOffsets_.size())
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186 {
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187 throw OrthancException(ErrorCode_ParameterOutOfRange);
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188 }
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189 else
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190 {
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191 return LookupIndexOfOffset(target, lowerOffsets_[index]);
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192 }
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193 }
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194 }