/*
* Copyright(c) 2017 Daneil Knuettel
*/

/* This program is free software.
* Anyways if you think this program is worth it
* and we meet shout a drink for me.
*/


/*    This program is free software: you can redistribute it and/or modify
*    it under the terms of the GNU Affero General Public License as published by
*    the Free Software Foundation, either version 3 of the License, or
*    (at your option) any later version.
*
*    This program is distributed in the hope that it will be useful,
*    but WITHOUT ANY WARRANTY; without even the implied warranty of
*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*    GNU Affero General Public License for more details.
*
*    You should have received a copy of the GNU Affero General Public License
*    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*
*    Dieses Programm ist Freie Software: Sie können es unter den Bedingungen
*    der GNU Affero General Public License, wie von der Free Software Foundation,
*    Version 3 der Lizenz oder (nach Ihrer Wahl) jeder neueren
*    veröffentlichten Version, weiterverbreiten und/oder modifizieren.
*
*    Dieses Programm wird in der Hoffnung, dass es nützlich sein wird, aber
*    OHNE JEDE GEWÄHRLEISTUNG, bereitgestellt; sogar ohne die implizite
*    Gewährleistung der MARKTFÄHIGKEIT oder EIGNUNG FÜR EINEN BESTIMMTEN ZWECK.
*    Siehe die GNU Affero General Public License für weitere Details.
*
*    Sie sollten eine Kopie der GNU Affero General Public License zusammen mit diesem
*    Programm erhalten haben. Wenn nicht, siehe <http://www.gnu.org/licenses/>.
*/

#ifndef __input_output_h_
#define __input_output_h_
#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<sys/select.h>
#include<signal.h>

/*
<doc>
This file contains all required input/output functions.

There is a special global flag variable 

::

	static volatile char EOF_received = 0;

that will be set to ``1``, if the stdin stream reached ``EOF``.
This flag will break the mainloop.
	
The following input functions are defined:

::
	
	char kb_hit(void);

returns 1, if there is a character on stdin.

::

	char get_last_key_or_default(void);

Returns the last entered character from stdin.
If there is no character it will return the
default character defined in ``conf.h``. 

If stdin reaches ``EOF`` the flag ``EOF_received`` will
be set.

The following output functions are defined:

::

	void put_line(char * line);

Puts the given line ``line`` of the horizon or playfield
on the stdout stream. The line is inside a frame and
highlights special characters according to ``conf.h``.

::

	void clear_screen(void);

Clears the screen. The number of lines and collumns 
are calculated according to ``conf.h``.

</doc>
 */

#include "conf.h"
void put_line(char * line);
void clear_screen(void);
char kb_hit(void);
char get_last_key_or_default(void);
static volatile char EOF_received = 0;

#endif