Mercurial > hg > orthanc

annotate Plugins/Samples/Common/DicomDatasetReader.cpp @ 2973:9b734c3e1095

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more defensive parsing of responses
author am@osimis.io
date Thu, 06 Dec 2018 10:39:08 +0100
parents 878b59270859
children 4e43e67f8ecf
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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) 2017-2018 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 "DicomDatasetReader.h"
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35
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36 #include "OrthancPluginException.h"
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37
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38 #include <boost/lexical_cast.hpp>
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39
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40 namespace OrthancPlugins
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41 {
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42 // This function is copied-pasted from "../../../Core/Toolbox.cpp",
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43 // in order to avoid the dependency of plugins against the Orthanc core
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44 static std::string StripSpaces(const std::string& source)
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45 {
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46 size_t first = 0;
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47
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48 while (first < source.length() &&
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49 isspace(source[first]))
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50 {
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51 first++;
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52 }
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53
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54 if (first == source.length())
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55 {
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56 // String containing only spaces
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57 return "";
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58 }
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59
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60 size_t last = source.length();
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61 while (last > first &&
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62 isspace(source[last - 1]))
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63 {
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64 last--;
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65 }
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66
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67 assert(first <= last);
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68 return source.substr(first, last - first);
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69 }
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70
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71
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72 DicomDatasetReader::DicomDatasetReader(const IDicomDataset& dataset) :
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73 dataset_(dataset)
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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 std::string DicomDatasetReader::GetStringValue(const DicomPath& path,
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79 const std::string& defaultValue) const
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80 {
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81 std::string s;
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82 if (dataset_.GetStringValue(s, path))
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83 {
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84 return s;
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85 }
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86 else
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87 {
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88 return defaultValue;
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89 }
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90 }
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91
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92
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93 std::string DicomDatasetReader::GetMandatoryStringValue(const DicomPath& path) const
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94 {
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95 std::string s;
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96 if (dataset_.GetStringValue(s, path))
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97 {
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98 return s;
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99 }
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100 else
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101 {
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102 ORTHANC_PLUGINS_THROW_EXCEPTION(InexistentTag);
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103 }
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104 }
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105
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106
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107 template <typename T>
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108 static bool GetValueInternal(T& target,
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109 const IDicomDataset& dataset,
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110 const DicomPath& path)
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111 {
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112 try
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113 {
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114 std::string s;
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115
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116 if (dataset.GetStringValue(s, path))
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117 {
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118 target = boost::lexical_cast<T>(StripSpaces(s));
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119 return true;
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120 }
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121 else
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122 {
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123 return false;
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124 }
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125 }
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126 catch (boost::bad_lexical_cast&)
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127 {
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128 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
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129 }
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130 }
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131
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132
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133 bool DicomDatasetReader::GetIntegerValue(int& target,
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134 const DicomPath& path) const
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135 {
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136 return GetValueInternal<int>(target, dataset_, path);
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137 }
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138
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139
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140 bool DicomDatasetReader::GetUnsignedIntegerValue(unsigned int& target,
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141 const DicomPath& path) const
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142 {
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143 int value;
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144
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145 if (!GetIntegerValue(value, path))
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146 {
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147 return false;
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148 }
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149 else if (value >= 0)
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150 {
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151 target = static_cast<unsigned int>(value);
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152 return true;
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153 }
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154 else
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155 {
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156 ORTHANC_PLUGINS_THROW_EXCEPTION(ParameterOutOfRange);
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157 }
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158 }
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159
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160
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161 bool DicomDatasetReader::GetFloatValue(float& target,
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162 const DicomPath& path) const
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163 {
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164 return GetValueInternal<float>(target, dataset_, path);
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165 }
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166
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167
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168 bool DicomDatasetReader::GetDoubleValue(double& target,
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169 const DicomPath& path) const
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170 {
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171 return GetValueInternal<double>(target, dataset_, path);
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172 }
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173 }