一个好用的log类(C++)

/******************************************************************** created: 2005/03/02 created: 2:3:2005 13:29 filename: Log.cpp file path: Updater file base: Log file ext: cpp author: Geert van Horrik purpose: *********************************************************************/ //********************************************************************* // INCLUDES //********************************************************************* #include "stdafx.h" //#include "Updater.h" #include "../forTest/forTest.h" #include "Log.h" //********************************************************************* // INITIALISATION //********************************************************************* std::auto_ptr<CLog> CLog::sm_inst; //********************************************************************* // CONSTRUCTOR & DESTRUCTOR //********************************************************************* CLog::CLog() { // Set file handler to NULL m_pLogFile = NULL; } //********************************************************************* // PUBLIC FUNCTIONS //********************************************************************* CLog * CLog::Instance() { if(sm_inst.get() == 0) sm_inst = auto_ptr<CLog>(new CLog); return sm_inst.get(); /* FOLLOWING CODE WORKS ONLY IN VC7 if(sm_inst.get() == 0) sm_inst.reset(new CLog); return sm_inst.get(); */ } //===================================================================== void CLog::CreateLog(CString sFilename, bool bEnableTimestamp) { // Create the new log m_pLogFile = new CStdioFile(sFilename, CFile::modeCreate | CFile::modeWrite | CFile::shareDenyNone | CFile::typeBinary); // Set timestamp option m_bEnableTimestamp = bEnableTimestamp; // Write first part so the file is unicode TCHAR bom = (TCHAR)0xFEFF; m_pLogFile->Write(&bom, sizeof(TCHAR)); CString sText; sText.Insert(0,_T("\r\n")); m_pLogFile->Write(sText, sText.GetLength() * sizeof(TCHAR)); } //===================================================================== void CLog::Log(CString sText) { USES_CONVERSION; // Check if log is already created if (m_pLogFile == NULL) return; // Should we add time to beginning of string? if (m_bEnableTimestamp) { sText.Insert(0, GetTime() + _T(" => ")); } // Add \n\r to end of text sText.Insert(sText.GetLength(), _T("\r\n")); // Log text m_pLogFile->Write(sText, sText.GetLength() * sizeof(TCHAR)); } //===================================================================== void CLog::CloseLog() { // Close file m_pLogFile->Close(); // Delete object delete m_pLogFile; // Set handle to NULL m_pLogFile = NULL; } //===================================================================== void CLog::EnableTimestamp(bool bEnable) { // Set timestamp option m_bEnableTimestamp = bEnable; } //********************************************************************* // PRIVATE FUNCTIONS //********************************************************************* CString CLog::GetTime() { // Declare variables SYSTEMTIME time; CString sTime; // Get time GetLocalTime(&time); // Set up time sTime.Format(_T("%02d:%02d:%02d:%03d"), time.wHour, time.wMinute, time.wSecond, time.wMilliseconds); // Return value return sTime; }