This module provides logging feature for Symbian OS. Main functions are listed below.
- Output to file
- Logging levels: Debug, Information, Warning and Error; you can customize which ones to write to the file
- Encodings: 8-bit, Unicode, UTF-8
- Buffered output for increasing performance with frequent write operations
- It`s possible to enable/disable logging in compile time
- Formatting (descriptors, ints, floats, etc...)
- Writes where the message was sent from (function name)
RFs fs;
User::LeaveIfError(fs.Connect());
CleanupClosePushL(fs);
_LIT(KLogFile, "c:\\log.txt");
RFile file;
file.Replace(fs, KLogFile, EFileWrite);
CleanupClosePushL(file);
CLogger *logger = CLogger::NewL(file, CLogger::ELevelAll & ~CLogger::ELevelDebug); // Prints all messages except Debug
CleanupStack::PushL(logger);
LoggerStatic::SetLogger(logger); // Set default logger
// You may use either 16 or 8-bit descriptors
LOG(_L16("Simple message in 16bit descriptor (uncategorized)"));
// or
LOG(_L8("Simple message in 8bit descriptor (uncategorized)"));
DEBUG(_L("This is debug message")); // This kind of message currently disabled in logger settings
INFO(_L("This is info message"));
WARNING(_L("This is warning message"));
_LIT(KErrTxt, "Not Found");
ERROR(_L("This is formatted error message with code: %d (%S)"), 404, &KErrTxt);
CleanupStack::PopAndDestroy(3, &fs); // logger + file + fs
LOG(_L("Logger already has been destroyed and this message won`t be included to the log file :("));c:\log.txt file:
20:12:50.176 [LoggerDemo()] Simple message in 16bit descriptor (uncategorized)
20:12:50.176 [LoggerDemo()] Simple message in 8bit descriptor (uncategorized)
20:12:50.176 (Info) [LoggerDemo()] This is info message
20:12:50.176 (Warning) [LoggerDemo()] This is warning message
20:12:50.176 (Error) [LoggerDemo()] This is formatted error message with code: 404 (Not Found)
Don`t forget to add these libs in your project MMP-file:
- efsrv.lib
- estor.lib
- charconv.lib
- Max strings length (with formatting) - 4 Kb