winix/core/log.cpp

/*
 * This file is a part of Winix
 * and is not publicly distributed
 * 
 * Copyright (c) 2008-2010, Tomasz Sowa
 * All rights reserved.
 * 
 */
 
#include "log.h"
#include <ctime>
#include <string.h>


Log::Log()
{
	log_level     = 3;
	current_level = 4; // nothing to log (call Init() first)
	item          = 0;
	item_save     = 1;
	lines         = 0;
}


void Log::Init(int log_l, const std::string & log_f, bool log_std, int log_request)
{
	log_level     = log_l;
	log_file      = log_f;
	log_stdout    = log_std;
	item_save     = log_request;

	OpenFile();
}


void Log::OpenFile()
{
	if( !log_file.empty() )
		file.open( log_file.c_str(), std::ios_base::out | std::ios_base::app );
}


void Log::PutDate(Manipulators m)
{
	time_t t = std::time(0);
	std::tm * loct = std::localtime(&t);
	
	char buffer[70];
	sprintf(buffer, "%d.%02d.%02d %02d:%02d:%02d ", int(loct->tm_year + 1900),
	                                                int(loct->tm_mon + 1),
	                                                int(loct->tm_mday), 
	                                                int(loct->tm_hour),
	                                                int(loct->tm_min),
	                                                int(loct->tm_sec));

	(*this) << m << buffer;
}

	


Log & Log::operator<<(const char * s)
{
	if( !s )
		return *this;

	buffer << s;
    
return *this;
}



Log & Log::operator<<(const std::string & s)
{
    buffer << s;
    
    return *this;
}



Log & Log::operator<<(const std::string * s)
{
    buffer << *s;
    
    return *this;
}


Log & Log::operator<<(const void * s)
{
    buffer << s;
    
    return *this;
}


Log & Log::operator<<(int s)
{
    buffer << s;

    return *this;
}



Log & Log::operator<<(long s)
{
    buffer << s;

    return *this;
}




Log & Log::operator<<(char s)
{
    buffer << s;

    return *this;
}



Log & Log::operator<<(size_t s)
{
    buffer << s;

    return *this;
}



Log & Log::operator<<(double s)
{
    buffer << s;

    return *this;
}



Log & Log::operator<<(Manipulators m)
{
	switch(m)
	{
	case logend:
		buffer << '\n';
		lines += 1;
		break;

	case logsavenow:
		SaveLog();
		buffer.str( "" );
		item  = 0;
		lines = 0;
		break;

	case logsave:
		item += 1;

		if( item >= item_save || lines > 3000 )
		{
			SaveLog();
			buffer.str( "" );
			item = 0;
			lines = 0;
		}
		break;
		
	case log1:
		current_level = 1;
		break;
		
	case log2:
		current_level = 2;
		break;
		
	case log3:
		current_level = 3;
		break;
	}

return *this;
}


void Log::SystemErr(int err)
{
	(*this) << "errno: " << err;

	const char * err_msg = strerror(err);

	if( err_msg )
		(*this) << " (" << err_msg << ")";
}


void Log::SaveLog()
{
	if( current_level > log_level )
		return;

	const std::string & source = buffer.str();

	if( source.empty() )
		return;

	if( log_stdout )
		std::cout << source;

	if( log_file.empty() )
		return;

	if( !file )
	{
		file.close();
		file.clear();

		OpenFile();

		if( !file )
			return;
	}

	file << source << std::endl;
}