/*
   common/console.h
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2.
*/

#ifndef __INCLUDED_COMMON_CONSOLE_H__
#define __INCLUDED_COMMON_CONSOLE_H__

// project headers
#include "common/common.h"

// C++ headers
#include <iostream>

/// global define to send a message to the system console
#define con_print common::Console::instance()->messagestream()
/// global define to send a warning message to the system console
#define con_warn common::Console::instance()->warningstream()

#ifdef HAVE_DEBUG_MESSAGES
/// global define to send a debug message to the system console
#define con_debug common::Console::instance()->debugstream()
#else
#define con_debug if (0) *(std::ostream*)(0)
#endif

namespace common {

/// interface for a console object that writes messages on the screen
class Console {
public:
	/// default constructor
	Console();

	/// default destructor
	virtual ~Console();

	/// stream to send normal messages too
	virtual std::ostream & messagestream() = 0;

	/// stream to send warning messages too
	virtual std::ostream & warningstream() = 0;

	/// stream to send debug messages too
	virtual std::ostream & debugstream() = 0;

	/// a pointer to the current console implementation
	static Console *instance();

private:
	/// console singleton
	static Console *console_instance;
}
; // class Console

} // namespace common

#endif // __INCLUDED_COMMON_CONSOLE_H__