"C + +" Implementation of the log system (including source code) __c++

Recently in the game development, read some of the source code after doing some summary and record, I hope to himself and other friends to help. Software development often will be the key operation, general warning and serious errors, through the form of string output to the log file, the notebook system to achieve Bootlog,debuglog,warning,fatallog output form, support multithreading. There is no place to welcome corrections, exchanges. Email:caohaitao_linux@163.com

Lolog Log System Key Knowledge :

1. File operation

2. Gets the string of the current time

3. The processing of variable parameter function

Lolog component Elements :

1. File pointer

2. File status (can be province)

3. Mutual exclusion Lock

Note: The file state can be obtained by determining whether the file pointer is empty, but this process is used frequently, and the function call form will make the pressure stack and stack operations too much. static int occupies less space, variable see name known to use convenient, it is best not to omit file state variables

UML diagram:

File Open operation

int Lologs::openlog (const char *pcloglead)
{
	int nret = 0;

	if (M_nfilestatus = = Filestatus_close)
	{
		char szopenpathname[maxsize_pathname] = {0};

		time_t	ltime;
		TM		Tmstruct;
		Time (<ime);
		Tmstruct = *localtime (<ime);

		strcat (Szopenpathname, subdirname_log);
		sprintf (Szopenpathname + strlen (szopenpathname), "%s%04d-%02d-%02d.log", Pcloglead, tmstruct.tm_year+1900, Tmstruct.tm_mon+1,tmstruct.tm_mday);
		#ifdef WIN32
		createdirectory (Subdirname_log, NULL);
		#else/* LINUX
		/mkdir (Subdirname_log, 0700);
		#endif
		m_filesvrlog = fopen (Szopenpathname, "A +");
		if (M_filesvrlog) 
		{
			m_nfilestatus = Filestatus_open;
		}
		else
		{
			nret =-1;
		}
	}

	return nret;
}

Gets the string of the current time

Clogs class member functions
const char *lologs::getcurdatetimewithstring (char *pstringbuf)
{
	time_t	Tcurdatetime;
	TM		*ptagcurdatatime;
	Char	sztimestringbuf[maxsize_timestring] = {0};

	char *pwritestringbuf = pstringbuf;
	if (NULL = = pwritestringbuf)
	{
		pwritestringbuf = sztimestringbuf;
	}

	Time (&tcurdatetime);
	Ptagcurdatatime = LocalTime (&tcurdatetime);

	sprintf (Pwritestringbuf, "%d-%02d-%02d%02d:%02d:%02d", 
		ptagcurdatatime->tm_year+1900, 
		Ptagcurdatatime->tm_mon+1, 
		ptagcurdatatime->tm_mday, 
		ptagcurdatatime->tm_hour, 
		Ptagcurdatatime->tm_min, 
		ptagcurdatatime->tm_sec);

	return pwritestringbuf;
}

The processing of variable parameter function

void Lologs::writelog (const char *pclogmsg, ...)
{
	char szmsgbuf[maxsize_msgbuf] = {0};
	Va_list va;
	Va_start (VA, pclogmsg);
	vsprintf (Szmsgbuf, Pclogmsg, VA);
#ifdef WIN32
	printf (szmsgbuf);
#endif
	va_end (VA);
	Writeloginner (Szmsgbuf, logleadname_boot);
}

C + + implementation of the log system source code