log.cpp

GSM Mobile收发短信

// Log.cpp: implementation of the CLog class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "Log.h"
#include "Resource.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif


#define CRLF "\x0d\x0a"

CRITICAL_SECTION LogCriticalSection;	// Protection from multiple threads 

UINT MessageBoxThreadProcFunc(LPVOID pParam);

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CLog::CLog
(	
	CString strLogFileName,
	DWORD dwMaxFileLength/* = 1000*/,
	BOOL bDisplayLogSizeWarning /*= TRUE*/
) :m_strLogfileName(strLogFileName),
	m_dwMaxLen(dwMaxFileLength),
	m_bDisplayDlg(bDisplayLogSizeWarning)
{
	m_bUseLog =TRUE;
	m_pLogFile =NULL;
	ASSERT (!strLogFileName.IsEmpty());
	Initialize ();
}

void CLog::Initialize ()
{
	InitializeCriticalSection(&LogCriticalSection);
	CFileException e;
	if (m_dwMaxLen == 0)	// if it is Zero there will be a deluge of errors !!
		m_dwMaxLen = 1000;
	m_dwMaxLen *= 1024;		// convert lenght supplied into kb's
	if (m_bUseLog)
	{
		m_pLogFile = new CFile();
		ASSERT (m_pLogFile != NULL);
		
		if (m_strLogfileName.IsEmpty ())
		{
			delete m_pLogFile;
			m_pLogFile = NULL;
			return;
		}
		if(!m_pLogFile->Open( m_strLogfileName,	
												CFile::modeCreate	 |	// if not there create it
												CFile::modeNoTruncate|	// Dont truncate 
												CFile::shareDenyNone |	// Let others also read
												CFile::modeWrite, &e ) )// Write into it
		{
			delete  m_pLogFile;
			m_pLogFile = NULL;	// we were not able to create the file so set ptr to NULL
#ifdef _DEBUG   
			afxDump << "不能打开文件 " << e.m_cause << "\n";
#endif 
		}

		if (m_pLogFile != NULL)
		{
			m_pLogFile->SeekToEnd () ;
		}
	}
}

CLog::~CLog()
{
	if (m_pLogFile != NULL)		
	{
		m_pLogFile->Close ();
		delete m_pLogFile;
		m_pLogFile = NULL;
	}
}

void CLog::LogMessage (UINT uMsgID)
{
	if (!m_bUseLog)		// Does the user want a log ?
		return;
	if (m_pLogFile == NULL)		
		return;
	CString strMsg;
	if (strMsg.LoadString (uMsgID))	// Load the String from the string table
	{
		CTime tmTime = CTime::GetCurrentTime ();
		//strMsg =((tmTime.Format ("%m/%d/%y %H:%M:%S  ")) + strMsg +CRLF);
		strMsg =strMsg +CRLF;
		m_pLogFile->Write (strMsg,strMsg.GetLength());
		DisplayWarningMessage();
	}
	else
		ASSERT (FALSE);
}

void CLog::LogMessage (CString strMsg)
{

	if (!m_bUseLog)
		return;
	if (m_pLogFile  == NULL)
		return;
	if (strMsg.IsEmpty ())
		return;
	CTime tmTime = CTime::GetCurrentTime();
	//strMsg =((tmTime.Format ("%m/%d/%y %H:%M:%S  ")) + strMsg +CRLF);
	strMsg =strMsg +CRLF;
	m_pLogFile->Write (strMsg,strMsg.GetLength());
	DisplayWarningMessage();
}
void CLog::DisplayWarningMessage()
{
	if (!m_bDisplayDlg)				// if a Warning Message Is already being shown
		return;						// dont populate the screen with more messages
	if(m_pLogFile == NULL)
		return;
	if (m_pLogFile->GetLength () <= m_dwMaxLen)		// Has file length exceded the limit?
		return;
	AfxBeginThread(MessageBoxThreadProcFunc,(LPVOID)&m_bDisplayDlg);
	m_bDisplayDlg = FALSE ;			// dont come back until user asks 
}
UINT MessageBoxThreadProcFunc(LPVOID pParam)
{	
	EnterCriticalSection(&LogCriticalSection);			// We are setting a variable here so
	BOOL *pbDisplayDlg = (BOOL*)pParam;
	(*pbDisplayDlg) = FALSE;							// take some precaution

	CString strMessage,strHeading;
	strMessage="日志文件的长度超过设定的文件最大长度";//.LoadString("IDS_LOG_FILE_LEN_WARNING");
	strHeading="日志-警告";//.LoadString("IDS_HEAD_BP_WARNING");

	if (MessageBox(NULL,strMessage,strHeading,MB_OKCANCEL) == IDOK)
	(*pbDisplayDlg) = TRUE;
	LeaveCriticalSection(&LogCriticalSection);
	return 0;
}

/*****************************************************************************************
Function Name : DeleteLogFile
Purpose		  : Deletes the Log File
Parameters    : None
Return Type   : BOOL 
Date  		  : 05-Nov-98
Modification History:
11/11/98		Converted Delete to Truncate the file to Zero length
*****************************************************************************************/
BOOL CLog::ClearLogFile()
{
	if (m_pLogFile != NULL)
		m_pLogFile->SetLength (0);				// The Log is gone !!!
	return TRUE;
}