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annotate Utils/LogFile.cpp @ 1:0b3630a29ad8

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Initial version based on previous repository. Project was ported to QT6 and in now cmake based.
author Ideenmodellierer <tiefenrauscher@web.de>
date Thu, 27 Nov 2025 18:40:28 +0100
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1
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1 //////////////////////////////////////////////////////////////////////////////
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2 /// \file LogFile.cpp
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3 /// \brief Put Log message into a log file.
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4 /// \author JD Gascuel.
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5 /// \copyright (c) 2011-2016 JD Gascuel. All rights reserved.
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6 /// $Id$
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7 //////////////////////////////////////////////////////////////////////////////
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8 //
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9 // BSD 2-Clause License:
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10 //
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11 // Redistribution and use in source and binary forms, with or without
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12 // modification, are permitted provided that the following conditions
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13 // are met:
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14 //
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15 // 1. Redistributions of source code must retain the above copyright notice,
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16 // this list of conditions and the following disclaimer.
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17 //
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18 // 2. Redistributions in binary form must reproduce the above copyright notice,
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19 // this list of conditions and the following disclaimer in the documentation
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20 // and/or other materials provided with the distribution.
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21 //
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22 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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23 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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24 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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25 // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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26 // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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27 // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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28 // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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29 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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30 // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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31 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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32 // THE POSSIBILITY OF SUCH DAMAGE.
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33 //
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34 //////////////////////////////////////////////////////////////////////////////
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35
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36 #include "Utils/LogFile.h"
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37
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38 #include <QCoreApplication>
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39 #include <QDir>
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40 #include <QMutex>
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41 #include <QSettings>
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42 #include <QRegularExpression>
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43
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44 #ifndef WIN32
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45 # include <sys/stat.h> // umask
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46 #else
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47 # include <io.h> // umask
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48 #endif
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49
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50 static QMutex mutex;
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51
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52 //////////////////////////////////////////////////////////////////////////////
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53
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54 LogFile::LogFile(int argc, char *argv[])
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55 : LogAppender(argc, argv),
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56 _holdFiles(5),
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57 _fileNameFormat("%a-%n.txt"),
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58 _logFile(NULL)
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59 {
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60 setMinLevel(defaultMinLevel());
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61 for(int i=1; i<argc; ++i)
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62 {
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63 if( strcmp("-dd", argv[i]) == 0 )
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64 setMinLevel(Log::LEVEL_DEBUG);
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65 else if( strcmp("-d", argv[i]) == 0 )
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66 setMinLevel(Log::LEVEL_TRACE);
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67 }
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68 }
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69
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70 LogFile::~LogFile()
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71 {
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72 if( _logFile )
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73 fclose(_logFile);
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74 _logFile = NULL;
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75 }
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76
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77 const char *LogFile::type() const
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78 {
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79 return "File";
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80 }
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81
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82 Log::Level LogFile::defaultMinLevel() const
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83 {
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84 return Log::LEVEL_TRACE;
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85 }
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86
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87
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88 const char* LogFile::defaultFormat() const
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89 {
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90 return "[%d %t] %o %F:%l: %m";
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91 }
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92
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93 //////////////////////////////////////////////////////////////////////////////
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94
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95 QString LogFile::filePath(bool pattern) const
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96 {
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97 QString path =
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98 #ifdef Q_OS_MAC
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99 QString("/tmp")
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100 #else
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101 QDir::tempPath()
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102 #endif
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103 + "/"
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104 + _fileNameFormat;
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105 path.replace("%n", pattern ? "*" : "001")
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106 .replace("%a", Log::applicationName());
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107 return path;
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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 void LogFile::cleanup()
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113 {
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114 QString name = filePath(true);
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115 QDir dir(name.section('/', 0, -2));
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116 name = name.section('/', -1);
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117
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118 // ---- Make sure the directory exists, and is writable by everyone.
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119 int oldUMask = umask(0);
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120 if( ! dir.exists() )
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121 QDir::current().mkdir( dir.absolutePath() );
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122
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123 // ---- Then perform the cleanup, if necessary
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124 QFileInfoList list = dir.entryInfoList(QStringList(name), QDir::Files, QDir::Name | QDir::Reversed);
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125 // QRegExp parse(name.replace("*", "([0-9]+)"));
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126 QRegularExpression parse(name.replace("*", "([0-9]+)"));
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127
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128 for(int i=0; i<list.count(); ++i)
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129 {
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130 QString log = list[i].fileName();
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131 #if 0
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132 if( parse.exactMatch(log) )
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133 {
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134 int num = parse.cap(1).toInt();
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135 if( num >= _holdFiles )
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136 dir.remove(log);
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137 else
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138 {
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139 QString newName = _fileNameFormat;
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140 newName.replace("%n", QString().sprintf("%03d", num+1))
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141 .replace("%a", Log::applicationName());
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142 dir.rename(log, newName);
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143 }
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144 }
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145 #endif
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146 QRegularExpressionMatch match = parse.match(log); // match erzeugen
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147 if (match.hasMatch()) // entspricht exactMatch
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148 {
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149 int num = match.captured(1).toInt(); // entspricht cap(1)
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150
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151 if (num >= _holdFiles)
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152 dir.remove(log);
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153 else
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154 {
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155 QString newName = _fileNameFormat;
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156 // newName.replace("%n", QString().sprintf("%03d", num+1))
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157 // .replace("%a", Log::applicationName());
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158 QString number = QString::number(num + 1).rightJustified(3, '0');
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159 newName.replace("%n", number)
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160 .replace("%a", Log::applicationName());
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161 dir.rename(log, newName);
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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 umask(oldUMask);
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167 }
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168
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169 //////////////////////////////////////////////////////////////////////////////
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170
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171 void LogFile::operator()(const Log &log)
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172 {
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173 // stdio FILE is not reentrant. So a lock here is mandatory.
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174 QMutexLocker locker(&mutex);
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175
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176 //---- Open the current log file -----------------------------------------
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177 if( ! _logFile )
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178 {
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179 //---- Clean old log files
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180 cleanup();
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181 //---- Then open the new one.
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182 QString name = filePath();
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183 _logFile = fopen(name.toLocal8Bit().constData(), "at+");
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184 }
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185
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186 //---- Output log line ---------------------------------------------------
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187 if( _logFile ) // File open succeded ?
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188 {
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189 QString line = format(log);
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190 fprintf(_logFile, "%s\n", line.toUtf8().constData());
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191 fflush(_logFile);
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192 }
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193 }