/**
 * General purpose logger class.
 *
 * Copyright (C) 2013 Tobias Klauser <tklauser@distanz.ch>
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License, version 2.
 */

#ifndef LOGGER_H_
#define LOGGER_H_

#include <stdarg.h>
#include <stdio.h>

/* TODO: Make singleton */
class Logger {

public:
	static Logger& getInstance()
	{
		// instantiated on first use, guaranteed to be destroyed
		static Logger instance;
		return instance;
	}

	int log(const char *fmt, ...);
	int warn(const char *fmt, ...);
	int err(const char *fmt, ...);
private:
	Logger() : _f_out(stdout), _f_err(stderr) { }
	~Logger() { }
	// Declare copy constructer to prevent the compiler from generating one
	Logger(Logger const&);
	void operator=(Logger const&);

	FILE *_f_out, *_f_err;
	static const char *_LOGGER_DATE_FMT;

	int _log_vfprintf(FILE *f, const char *prefix, const char *fmt, va_list ap);
};

#endif /* LOGGER_H_ */