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/*
Joystick Wrapper
Any program wanting to use the Linux Joystick Wrapper
functions (as specified in this file) needs to #include
this file and link to the library libjsw.
An example program called jswtest should acompany
the program package that this header file came in.
For contact information, see:
http://fox.mit.edu/xsw/contacts.htm
*/
#ifndef JSW_H
#define JSW_H
#include <time.h>
#include <sys/types.h>
/*
* OS Specific Definations:
*/
#ifdef __linux__
# include <linux/joystick.h>
# define JSDefaultDevice "/dev/js0"
# define JSDefaultCaliberation ".joystick"
#endif
/* Assume defaults for device and caliberation file. */
#ifndef JSDefaultDevice
# define JSDefaultDevice "/dev/js0"
#endif
#ifndef JSDefaultCaliberation
# define JSDefaultCaliberation ".joystick"
#endif
/*
* Default stick bounds (in raw units):
*/
#ifndef JSDefaultMin
# define JSDefaultMin 0
#endif
#ifndef JSDefaultMax
# define JSDefaultMax 1000
#endif
#ifndef JSDefaultCenter
# define JSDefaultCenter 500
#endif
#ifndef JSDefaultNullZone
# define JSDefaultNullZone 100
#endif
/*
* Error codes:
*/
#define JSSuccess 0
#define JSError 1
#define JSBadValue 2
#define JSNoAccess 3
#define JSNoBuffers 4
/*
* Event codes:
*/
#define JSNoEvent 0
#define JSGotEvent 1
/*
* Button state codes:
*/
#define JSButtonStateOff 0
#define JSButtonStateOn 1
/*
* Joystick data structures:
*/
/* Axis structure. */
typedef struct {
/* All units in raw units. */
int cur; /* Current position. */
int min, cen, max; /* Bounds. */
int nz; /* Null zone, in raw units from cen. */
char flip; /* Flip values? */
char is_hat; /* Treat this axis as a hat? */
} js_axis_struct;
/* Button structure. */
typedef struct {
unsigned char state; /* One of JSButtonState*. */
} js_button_struct;
/* Joystick caliberation and current data structure. */
typedef struct {
/* Public, read only. */
char *name;
js_axis_struct **axis;
int total_axises;
js_button_struct **button;
int total_buttons;
char *device_name;
char *caliberation_file;
time_t time;
/* Private, do not access. */
int fd;
} js_data_struct;
/* Private functions. */
#ifdef __linux__
extern int JSLoadCaliberationLinux(js_data_struct *jsd);
#endif
/* Public functions. */
extern int JSIsAxisAllocated(js_data_struct *jsd, int n);
extern int JSIsButtonAllocated(js_data_struct *jsd, int n);
extern double JSGetAxisCoeff(js_data_struct *jsd, int n);
extern double JSGetAxisCoeffNZ(js_data_struct *jsd, int n);
extern int JSInit(
js_data_struct *jsd,
int argc, char *argv[]
);
extern int JSUpdate(js_data_struct *jsd);
extern void JSClose(js_data_struct *jsd);
#endif /* JSW_H */
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