program.h

#ifndef __program_h
#define __program_h

#include <sys/types.h>

#define DEVICE_JOYSTICK		128
#define DEVICE_KBD		64
#define DEVICE_MOUSE		32
#define DEVICE_NONE		0

#define TYPE_AXIS		1
#define TYPE_BUTTON		2
#define TYPE_SHIFT		3 //the shift button, target for button remap

#define FLAG_NONE		0
#define FLAG_AUTO_RELEASE 	1
#define FLAG_INVERT	 	2
#define FLAG_RELEASE		4
#define FLAG_SHIFT		8 //only if shifted
#define FLAG_PRESS		16 //not used by driver
#define FLAG_BINARY     32
#define FLAG_TRINARY    64
#define KEYMASK			0xfff
#define RELEASEMASK		32768
#define SEQUENCE_DONE		65535

#define PROGRAM_AXIS_REMAP	1
#define PROGRAM_BUTTON_REMAP	2
#define PROGRAM_AXIS_PROPERTIES 3
#define PROGRAM_CODE		4

#define MAX_SEQUENCE		16	//approximately 8 keys max
#define JOYSTICK_USE_VENDOR	255
#define JOYSTICK_CODE		255
#define JOYSTICK_CODE_VENDOR	0
#define JOYSTICK_CODE_PRODUCT	0

#define MAX_CODE_SIZE		16384
// sigh ... we get out of memory on opening the event stream
// if the number of axes is too large (64)
#define MAX_AXES            16
#define MAX_BUTTONS         32

//virtual machine instructions
#define HALT	0
#define JZ	1
#define JUMP	2
#define JUMPREL	3
#define ADD	4
#define SUB	5
#define MUL	6
#define DIV	7
#define LT	8
#define LE	9
#define GT	10
#define GE	11
#define EQ	12
#define NEQ	13
#define AND	14
#define OR	15
#define NOT	16
#define PUSH	17
#define POP	18
#define DEC	19
#define INC	20
#define KEY	21 //press a key
#define SIGNAL	22 //send a signal to a daemon
#define THREAD	23 //context switch, gets two jump targets from the stack:
			//1-where to return when thread stops
			//2-where to start the thread
#define YIELD   24 //return from a thread (back to main thread)
#define NEG	25
#define JOIN	26 //stop an executing thread
#define PUSHA	27 //for arrays
#define POPA	28 //for arrays
#define DECA	29 //for arrays
#define INCA	30 //for arrays

//address types
#define GP	0
#define CODEB	1
#define CODEA	2
#define JS	3
#define CONST	4	
#define GLOBAL  5

//registers, first 10 are reserved or fixed function
#define RESERVED	10
#define FIRSTSCAN	0
#define CLOCKTICK	1
#define XREL		2
#define YREL		3
#define ZREL		4
#define TIMESTAMP	5
#define	CURRENTMODE	6
//the offset register, always added to any address
//registers, joystick etc) but not constants or stack
//the ofsreg is reset to zero after every instruction
#define OFSREG		7

//use the joystick if specified, if joystick is 255
// then use the vendor and product to identify the
// joystick. This device should already be present in the
//	system. Otherwise the map is ignored.
// if vendor=255 and product=0, then this refers to the virtual CODE joystick
struct program_axis_remap {
	__uint8_t program;   //PROGRAM_AXIS_REMAP
	__uint8_t joystick;
	__uint16_t vendor;
	__uint16_t product;
	__uint8_t srcaxis;
	__uint8_t device;	//low bits of device identify joystick
	__uint8_t type;
	__uint8_t flags;
	__uint16_t axis;
	__uint16_t plus[MAX_SEQUENCE];   //if top bit set, release
	__uint16_t minus[MAX_SEQUENCE];   //if top bit set, release
    __int32_t saved_value;  // for implementing binary decisions
    __int32_t min;
    __int32_t max;
    __int32_t deadzone;
    __int32_t speed;
};

struct program_axis_properties {
	__uint8_t program;   //PROGRAM_AXIS_PROPERTIES
	__uint8_t joystick;
	__uint16_t vendor;
	__uint16_t product;
	__uint8_t srcaxis;
	__uint8_t flags;
	__int16_t scale;	//8.8 fixed point
	__int16_t bias;	//shift after scale
	__uint16_t threshhold;
};

#define press sequence[0]
#define release sequence[0]
struct program_button_remap {
	__uint8_t program;   //PROGRAM_BUTTON_REMAP
	__uint8_t joystick;
	__uint16_t vendor;
	__uint16_t product;
	__uint16_t srcbutton;
	__uint8_t device;	//low bits of device identify joystick
	__uint8_t type;
	__uint8_t flags;
	__uint16_t sequence[MAX_SEQUENCE];   //if top bit set, release
    __int32_t speed;
};

struct program_code {
	__uint8_t program;   //PROGRAM_CODE
	unsigned char code[MAX_CODE_SIZE]; //1024 4 byte codes
};

void code_set_program(struct program_code *code);
void remap_button(struct program_button_remap *btn);
void remap_axis(struct program_axis_remap *axis);
#endif