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annotate engine/core/util/log/logger.h @ 526:c916d7b7de1c

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Added the goldstack image as I forgot to add it before.
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Fri, 28 May 2010 04:15:56 +0000
parents 90005975cdbb
children
rev   line source
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1 /***************************************************************************
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2 * Copyright (C) 2005-2008 by the FIFE team *
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3 * http://www.fifengine.de *
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4 * This file is part of FIFE. *
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5 * *
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6 * FIFE is free software; you can redistribute it and/or *
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7 * modify it under the terms of the GNU Lesser General Public *
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8 * License as published by the Free Software Foundation; either *
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9 * version 2.1 of the License, or (at your option) any later version. *
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10 * *
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11 * This library is distributed in the hope that it will be useful, *
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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14 * Lesser General Public License for more details. *
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15 * *
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16 * You should have received a copy of the GNU Lesser General Public *
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17 * License along with this library; if not, write to the *
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18 * Free Software Foundation, Inc., *
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19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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20 ***************************************************************************/
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21
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22 #ifndef FIFE_LOGGER_H
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23 #define FIFE_LOGGER_H
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24
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25 // Standard C++ library includes
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26 #include <iomanip>
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27 #include <iostream>
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28 #include <list>
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29 #include <sstream>
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30 #include <string>
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31 #include <vector>
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32 #include <map>
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33 #include <set>
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34
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35 // 3rd party library includes
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36
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37 // FIFE includes
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38 // These includes are split up in two parts, separated by one empty line
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39 // First block: files included from the FIFE root src directory
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40 // Second block: files included from the same folder
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41 #include "modules.h"
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42
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43 #ifdef LOG_ENABLED
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44
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45 /** Logs given message with log level "debug" using given logger instance
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46 */
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47 #define FL_DBG(logger, msg) do { if (LogManager::instance()->isVisible(logger.getModule())) logger.log(LogManager::LEVEL_DEBUG, msg); } while(0)
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48
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49 /** Logs given message with log level "log" using given logger instance
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50 */
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51 #define FL_LOG(logger, msg) do { if (LogManager::instance()->isVisible(logger.getModule())) logger.log(LogManager::LEVEL_LOG, msg); } while(0)
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52
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53 /** Logs given message with log level "warning" using given logger instance
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54 */
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55 #define FL_WARN(logger, msg) do { if (LogManager::instance()->isVisible(logger.getModule())) logger.log(LogManager::LEVEL_WARN, msg); } while(0)
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56
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57 /** Logs given message with log level "error" using given logger instance
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58 */
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59 #define FL_ERR(logger, msg) do { if (LogManager::instance()->isVisible(logger.getModule())) logger.log(LogManager::LEVEL_ERROR, msg); } while(0)
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60
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61 /** Logs given message with log level "pacic" using given logger instance.
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62 * Causes also program to abort
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63 */
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64 #define FL_PANIC(logger, msg) do { if (LogManager::instance()->isVisible(logger.getModule())) logger.log(LogManager::LEVEL_PANIC, msg); } while(0)
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65
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66 #else
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67 // empty definitions in case logs are turned off for speed
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68 #define FL_DBG(logger, msg)
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69 #define FL_LOG(logger, msg)
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70 #define FL_WARN(logger, msg)
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71 #define FL_ERR(logger, msg)
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72 #define FL_PANIC(logger, msg)
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73 #endif
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74
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75 namespace FIFE {
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76
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77 /** Helper class to create log strings out from separate parts
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78 * Usage: LMsg("some text") << variable << ", " << other variable
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79 */
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80 class LMsg {
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81 public:
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82 LMsg(const std::string& msg=""): str(msg) {}
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83 ~LMsg() {}
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84
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85 template <typename T> LMsg& operator<<(const T& t) {
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86 std::ostringstream stream;
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87 stream << t;
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88 str += stream.str();
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89 return *this;
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90 }
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91
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92 std::string str;
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93 };
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94
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95 /** Logmanager takes care of log filtering and output direction
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96 */
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97 class LogManager {
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98 public:
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99 /** Loglevel is used to set a treshold for output messages + related filter
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100 * E.g. in case log message has LEVEL_WARN, but the filter treshold is LEVEL_ERROR,
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101 * log message is not outputted
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102 */
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103 enum LogLevel {
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104 LEVEL_DEBUG = 0,
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105 LEVEL_LOG = 1,
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106 LEVEL_WARN = 2,
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107 LEVEL_ERROR = 3,
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108 LEVEL_PANIC = 4
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109 };
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110
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111 /** Returns instance to log manager. Log manager is a singleton class
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112 */
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113 static LogManager* instance();
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114
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115 /** Destructor
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116 */
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117 ~LogManager();
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118
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119 /** Logs given message
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120 * @param level level of this log (e.g. warning)
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121 * @param module module where this log message is coming from. Modules are defined in modules.h-file
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122 * @param msg message to log
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123 * @note do not use this method directly, instead use FL_WARN (or any other FL_XXX) macro
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124 */
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125 void log(LogLevel level, logmodule_t module, const std::string& msg);
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126
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127 /** Sets currently used level filter.
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128 * For usage, @see LogManager::LogLevel
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129 */
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130 void setLevelFilter(LogLevel level);
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131
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132 /** Gets currently used level filter.
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133 * @see LogManager::LogLevel
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134 */
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135 LogLevel getLevelFilter();
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136
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137 /** Adds visible module into logmanager
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138 * Module corresponds some module in the engine. Modules may contain other modules.
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139 * Modules and their structure is defined in file modules.h.
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140 * In case module is not visible, LogManager filters corresponding log messages
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141 * from output. In case some lower-level module is set visible, it also sets
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142 * all upper level modules visible
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143 * @param module module to set visible
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144 */
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145 void addVisibleModule(logmodule_t module);
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146
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147 /** Removes visible module, @see addVisibleModule
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148 */
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149 void removeVisibleModule(logmodule_t module);
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150
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151 /** Removes all visible modules, @see addVisibleModule
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152 */
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153 void clearVisibleModules();
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154
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155 /** Tells if given module is visible
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156 */
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157 bool isVisible(logmodule_t module);
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158
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159 /** Sets LogManager to log to prompt
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160 */
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161 void setLogToPrompt(bool log_to_promt);
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162
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163 /** Tells if LogManager is set to log to prompt
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164 */
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165 bool isLoggingToPrompt();
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166
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167 /** Sets LogManager to log to a file
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168 */
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169 void setLogToFile(bool logtofile);
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170
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171 /** Tells if LogManager is set to log to a file
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172 */
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173 bool isLoggingToFile();
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174
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175 /** Gets display name for given module id
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176 * E.g. LM_AUDIO -> "Audio"
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177 */
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178 std::string getModuleName(logmodule_t module);
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179
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180 private:
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181 void validateModule(logmodule_t m);
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182
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183 // hidden constructor for singleton
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184 LogManager();
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185 // validates if definitions in module.h are valid
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186 void validateModuleDescription(logmodule_t module);
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187
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188 // singleton instance
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189 static LogManager* m_instance;
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190 // current filter level
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191 LogLevel m_level;
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192 // visibility array for modules
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193 bool m_modules[LM_MODULE_MAX];
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194 // used during module description validation to check cycles in hierarchy
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195 std::vector<logmodule_t> module_check_stack;
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196
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197 bool m_logtofile;
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198 bool m_logtoprompt;
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199
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200 std::ofstream* m_logfile;
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201 };
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202
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203 /** Create a Logger instance to communicate with LogManager
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204 * Logger stores information about the current module thus reducing
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205 * the typing needed for individual traces
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206 * Common way of doing things is to instantiate a static Logger on
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207 * top of .cpp file and then use that in .cpp-file's methods
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208 */
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209 class Logger {
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210 public:
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211 /** Creates new logger and associates it with given module
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212 */
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213 Logger(logmodule_t module);
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214
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215 /** Destructor
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216 */
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217 ~Logger();
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218
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219 /** logs given message with given log level
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220 */
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221 void log(LogManager::LogLevel level, const std::string& msg);
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222
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223 /** logs given message with given log level.
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224 * Message is wrapped into LMsg instance for easy formatting
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225 */
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226 void log(LogManager::LogLevel level, const LMsg& msg);
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227
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228 /** gets module where this logger is associated to
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229 */
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230 inline logmodule_t getModule() const { return m_module; }
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231
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232 private:
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233 logmodule_t m_module;
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234 };
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235
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236 /** Helper for printing a pointer
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237 *
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238 * This is a helper structure that allows printing any kind of pointer
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239 * on (hopefully) any platform in hex, kind of like the %p format
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240 * string of printf.
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241 *
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242 * The mechanism is used by calling something like:
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243 * somestream << pprint(ptr);
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244 **/
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245 struct pprint {
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246 void* p;
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247 pprint( void* _p ) : p(_p) {}
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248 };
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249 }
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250
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251 namespace std {
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252 /** Print a pprint object to an ostream.
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253 *
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254 * This is pure Stroustrup, overloading the ostream operator<< to print
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255 * a formatted pointer from a pprint object to an ostream.
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256 *
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257 * \param s output stream
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258 * \param p pointer to print
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259 * \return reference to the modified stream
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260 * */
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261 template <class Ch, class Tr>
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262 basic_ostream<Ch,Tr>& operator<<( basic_ostream<Ch,Tr>& s, const FIFE::pprint& p ) {
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263 s << "0x"
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264 << hex << setw( 2*sizeof(void*) ) << setfill('0')
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265 << reinterpret_cast<unsigned long>( p.p );
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266
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267 return s;
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268 }
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269 }
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270
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271
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272 #endif