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annotate Core/Logging.h @ 2484:911e62dbb4ac

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logging to stdio
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 02 Mar 2018 18:25:07 +0100
parents 9c54c40eaf25
children 78862372ea88
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
1900
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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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33
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34 #pragma once
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35
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36 #include <iostream>
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37
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38 #if !defined(ORTHANC_ENABLE_LOGGING)
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39 # error The macro ORTHANC_ENABLE_LOGGING must be defined
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40 #endif
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41
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42 #if !defined(ORTHANC_ENABLE_LOGGING_PLUGIN)
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43 # if ORTHANC_ENABLE_LOGGING == 1
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44 # error The macro ORTHANC_ENABLE_LOGGING_PLUGIN must be defined
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45 # else
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46 # define ORTHANC_ENABLE_LOGGING_PLUGIN 0
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47 # endif
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48 #endif
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49
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50 #if !defined(ORTHANC_ENABLE_LOGGING_STDIO)
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51 # if ORTHANC_ENABLE_LOGGING == 1
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52 # error The macro ORTHANC_ENABLE_LOGGING_STDIO must be defined
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53 # else
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54 # define ORTHANC_ENABLE_LOGGING_STDIO 0
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55 # endif
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56 #endif
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57
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58 #if ORTHANC_ENABLE_LOGGING_PLUGIN == 1
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59 # include <orthanc/OrthancCPlugin.h>
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60 #endif
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61
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62 namespace Orthanc
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63 {
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64 namespace Logging
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65 {
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66 #if ORTHANC_ENABLE_LOGGING_PLUGIN == 1
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67 void Initialize(OrthancPluginContext* context);
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68 #else
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69 void Initialize();
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70 #endif
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71
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72 void Finalize();
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73
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74 void Reset();
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75
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76 void Flush();
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77
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78 void EnableInfoLevel(bool enabled);
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79
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80 void EnableTraceLevel(bool enabled);
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81
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82 void SetTargetFile(const std::string& path);
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83
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84 void SetTargetFolder(const std::string& path);
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85
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86 struct NullStream : public std::ostream
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87 {
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88 NullStream() :
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89 std::ios(0),
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90 std::ostream(0)
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91 {
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92 }
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93
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94 std::ostream& operator<< (const std::string& message)
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95 {
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96 return *this;
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97 }
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98
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99 // This overload fixes build problems with Visual Studio 2015
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100 std::ostream& operator<< (const char* message)
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101 {
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102 return *this;
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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
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108
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109 #if ORTHANC_ENABLE_LOGGING != 1
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110
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111 # define LOG(level) ::Orthanc::Logging::NullStream()
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112 # define VLOG(level) ::Orthanc::Logging::NullStream()
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113
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114
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115 #elif (ORTHANC_ENABLE_LOGGING_PLUGIN == 1 || \
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116 ORTHANC_ENABLE_LOGGING_STDIO == 1)
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117
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118 # include <boost/noncopyable.hpp>
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119 # include <boost/lexical_cast.hpp>
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120 # define LOG(level) ::Orthanc::Logging::InternalLogger \
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121 (::Orthanc::Logging::level, __FILE__, __LINE__)
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122 # define VLOG(level) ::Orthanc::Logging::InternalLogger \
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123 (::Orthanc::Logging::TRACE, __FILE__, __LINE__)
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124
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125 namespace Orthanc
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126 {
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127 namespace Logging
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128 {
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129 enum Level
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130 {
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131 ERROR,
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132 WARNING,
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133 INFO,
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134 TRACE
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135 };
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136
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137 class InternalLogger : public boost::noncopyable
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138 {
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139 private:
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140 Level level_;
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141 std::string message_;
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142
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143 public:
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144 InternalLogger(Level level,
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145 const char* file,
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146 int line);
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147
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148 ~InternalLogger();
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149
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150 template <typename T>
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151 InternalLogger& operator<< (T message)
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152 {
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153 message_ += boost::lexical_cast<std::string>(message);
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154 return *this;
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155 }
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156 };
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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
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162
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163 #else /* ORTHANC_ENABLE_LOGGING_PLUGIN == 0 &&
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164 ORTHANC_ENABLE_LOGGING_STDIO == 0 &&
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165 ORTHANC_ENABLE_LOGGING == 1 */
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166
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167 # include <boost/thread/mutex.hpp>
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168 # define LOG(level) ::Orthanc::Logging::InternalLogger(#level, __FILE__, __LINE__)
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169 # define VLOG(level) ::Orthanc::Logging::InternalLogger("TRACE", __FILE__, __LINE__)
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170
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171 namespace Orthanc
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172 {
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173 namespace Logging
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174 {
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175 class InternalLogger
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176 {
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177 private:
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178 boost::mutex::scoped_lock lock_;
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179 NullStream null_;
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180 std::ostream* stream_;
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181
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182 public:
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183 InternalLogger(const char* level,
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184 const char* file,
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185 int line);
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186
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187 ~InternalLogger();
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188
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189 std::ostream& operator<< (const std::string& message)
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190 {
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191 return (*stream_) << message;
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192 }
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193
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194 // This overload fixes build problems with Visual Studio 2015
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195 std::ostream& operator<< (const char* message)
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196 {
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197 return (*stream_) << message;
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198 }
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199 };
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200 }
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201 }
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202
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203 #endif // ORTHANC_ENABLE_LOGGING