Mercurial > hg > orthanc

annotate Core/Logging.h @ 3353:54cdad5a7228 emscripten-logging

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Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
author Benjamin Golinvaux <bgo@osimis.io>
date Tue, 23 Apr 2019 21:40:57 +0200
parents 4e43e67f8ecf
children 815b81142ff7
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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) 2017-2019 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 #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 #include <boost/lexical_cast.hpp>
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63
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64 namespace Orthanc
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65 {
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66 namespace Logging
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67 {
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68 #if ORTHANC_ENABLE_LOGGING_PLUGIN == 1
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69 void Initialize(OrthancPluginContext* context);
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70 #else
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71 void Initialize();
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72 #endif
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73
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74 void Finalize();
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75
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76 void Reset();
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77
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78 void Flush();
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79
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80 void EnableInfoLevel(bool enabled);
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81
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82 void EnableTraceLevel(bool enabled);
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83
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84 #ifdef __EMSCRIPTEN__
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85 // calling this function will change the error_, warning_ and info_
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86 // stream objects so that their operator<< writes into the browser
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87 // console using emscripten_console_error(), emscripten_console_warn()
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88 // and emscripten_console_log()
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89 void EnableEmscriptenLogging();
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90 #endif
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91
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92 void SetTargetFile(const std::string& path);
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93
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94 void SetTargetFolder(const std::string& path);
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95
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96 struct NullStream : public std::ostream
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97 {
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98 NullStream() :
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99 std::ios(0),
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100 std::ostream(0)
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101 {
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102 }
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103
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104 template <typename T>
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105 std::ostream& operator<< (const T& message)
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106 {
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107 return *this;
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108 }
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109 };
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110 }
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111 }
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112
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113
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114 #if ORTHANC_ENABLE_LOGGING != 1
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115
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116 # define LOG(level) ::Orthanc::Logging::NullStream()
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117 # define VLOG(level) ::Orthanc::Logging::NullStream()
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118
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119
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120 #elif (ORTHANC_ENABLE_LOGGING_PLUGIN == 1 || \
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121 ORTHANC_ENABLE_LOGGING_STDIO == 1)
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122
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123 # include <boost/noncopyable.hpp>
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124 # define LOG(level) ::Orthanc::Logging::InternalLogger \
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125 (::Orthanc::Logging::InternalLevel_ ## level, __FILE__, __LINE__)
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126 # define VLOG(level) ::Orthanc::Logging::InternalLogger \
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127 (::Orthanc::Logging::InternalLevel_TRACE, __FILE__, __LINE__)
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128
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129 namespace Orthanc
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130 {
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131 namespace Logging
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132 {
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133 enum InternalLevel
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134 {
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135 InternalLevel_ERROR,
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136 InternalLevel_WARNING,
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137 InternalLevel_INFO,
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138 InternalLevel_TRACE
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139 };
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140
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141 class InternalLogger : public boost::noncopyable
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142 {
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143 private:
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144 InternalLevel level_;
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145 std::string message_;
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146
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147 public:
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148 InternalLogger(InternalLevel level,
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149 const char* file,
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150 int line);
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151
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152 ~InternalLogger();
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153
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154 template <typename T>
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155 InternalLogger& operator<< (const T& message)
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156 {
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157 message_ += boost::lexical_cast<std::string>(message);
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158 return *this;
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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
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164
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165
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166
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167 #else /* ORTHANC_ENABLE_LOGGING_PLUGIN == 0 &&
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168 ORTHANC_ENABLE_LOGGING_STDIO == 0 &&
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169 ORTHANC_ENABLE_LOGGING == 1 */
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170
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171 # include <boost/thread/mutex.hpp>
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172 # define LOG(level) ::Orthanc::Logging::InternalLogger(#level, __FILE__, __LINE__)
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173 # define VLOG(level) ::Orthanc::Logging::InternalLogger("TRACE", __FILE__, __LINE__)
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174
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175 namespace Orthanc
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176 {
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177 namespace Logging
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178 {
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179 class InternalLogger
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180 {
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181 private:
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182 boost::mutex::scoped_lock lock_;
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183 NullStream null_;
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184 std::ostream* stream_;
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185
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186 public:
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187 InternalLogger(const char* level,
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188 const char* file,
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189 int line);
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190
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191 ~InternalLogger();
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192
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193 template <typename T>
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194 std::ostream& operator<< (const T& message)
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195 {
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196 return (*stream_) << boost::lexical_cast<std::string>(message);
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197 }
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198 };
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199
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200 /**
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201 opaque pointer that represents the state of the logging configuration
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202 */
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203 typedef void* LoggingMemento;
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204
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205 /**
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206 Returns an object that contains the logging configuration.
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207
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208 This function allocates resources that you must dispose of by
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209 using either RestoreLoggingMemento or DiscardLoggingMemento.
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210
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211 This function is only to be used by tests.
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212 */
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213 LoggingMemento CreateLoggingMemento();
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214
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215 /**
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216 Restores the logging configuration. The logging system is restored in
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217 the state it was in when the memento object was created through
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218 GetLoggingMemento().
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219
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220 After calling this function, the memento object may not be used
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221 again
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222
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223 This function is only to be used by tests.
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224 */
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225 void RestoreLoggingMemento(LoggingMemento memento);
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226
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227 /**
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228 Call this function if you do not plan on restoring the logging
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229 configuration state that you captured with CreateLoggingMemento
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230
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231 This function is only to be used by tests.
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232 */
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233 void DiscardLoggingMemento(LoggingMemento memento);
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234
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235 /**
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236 std::streambuf subclass used in FunctionCallingStream
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237 */
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238 template<typename T>
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239 class FuncStreamBuf : public std::stringbuf
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240 {
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241 public:
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242 FuncStreamBuf(T func) : func_(func) {}
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243
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244 virtual int sync()
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245 {
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246 std::string text = this->str();
54cdad5a7228 Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
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247 const char* buf = text.c_str();
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248 func_(buf);
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249 this->str("");
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250 return 0;
54cdad5a7228 Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
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251 }
54cdad5a7228 Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
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252 private:
54cdad5a7228 Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
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253 T func_;
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254 };
54cdad5a7228 Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
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255
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256 /**
54cdad5a7228 Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
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257 Set custom logging streams for the error, warning and info logs.
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258 This function may not be called if a log file or folder has been
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259 set beforehand. All three pointers must be valid and cannot be NULL.
54cdad5a7228 Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
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260
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261 Please ensure the supplied streams remain alive and valid as long as
54cdad5a7228 Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
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262 logging calls are performed.
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263
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264 In order to prevent dangling pointer usage, it is recommended to call
54cdad5a7228 Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
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265 Orthanc::Logging::Reset() before the stream objects are destroyed and
54cdad5a7228 Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
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266 the pointers become invalid.
54cdad5a7228 Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
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267 */
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268 void SetErrorWarnInfoLoggingStreams(std::ostream* errorStream,
54cdad5a7228 Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
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269 std::ostream* warningStream,
54cdad5a7228 Added a public function that will use emscripten-specific logging functions when using its SDK + scaffolding work. Build and UT OK on msvc15 x64. Not actually tested under *nix or emscripten yet
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270 std::ostream* infoStream);
1485
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271 }
27661b33f624 Creation of Logging.h
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272 }
1488
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273
1491
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274 #endif // ORTHANC_ENABLE_LOGGING