kegs-android/jni/joystick_linux.c

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/************************************************************************/
/* KEGS: Apple //gs Emulator */
/* Copyright 2002 by Kent Dickey */
/* */
/* This code is covered by the GNU GPL */
/* */
/* The KEGS web page is kegs.sourceforge.net */
/* You may contact the author at: kadickey@alumni.princeton.edu */
/************************************************************************/
const char rcsid_joystick_driver_c[] = "@(#)$KmKId: joystick_driver.c,v 1.12 2004-10-17 21:28:48-04 kentd Exp $";
#include "defc.h"
#include <sys/time.h>
# include <linux/joystick.h>
extern int g_joystick_native_type1; /* in paddles.c */
extern int g_joystick_native_type2; /* in paddles.c */
extern int g_joystick_native_type; /* in paddles.c */
extern int g_paddle_buttons;
extern int g_paddle_val[];
const char *g_joystick_dev = "/dev/js0"; /* default joystick dev file */
#define MAX_JOY_NAME 128
int g_joystick_native_fd = -1;
int g_joystick_num_axes = 0;
int g_joystick_num_buttons = 0;
void
joystick_init()
{
char joy_name[MAX_JOY_NAME];
int version;
int fd;
int i;
fd = open(g_joystick_dev, O_RDONLY | O_NONBLOCK);
if(fd < 0) {
printf("Unable to open joystick dev file: %s, errno: %d\n",
g_joystick_dev, errno);
printf("Defaulting to mouse joystick\n");
return;
}
strcpy(&joy_name[0], "Unknown Joystick");
version = 0x800;
ioctl(fd, JSIOCGNAME(MAX_JOY_NAME), &joy_name[0]);
ioctl(fd, JSIOCGAXES, &g_joystick_num_axes);
ioctl(fd, JSIOCGBUTTONS, &g_joystick_num_buttons);
ioctl(fd, JSIOCGVERSION, &version);
printf("Detected joystick: %s [%d axes, %d buttons vers: %08x]\n",
joy_name, g_joystick_num_axes, g_joystick_num_buttons,
version);
g_joystick_native_type1 = 1;
g_joystick_native_type2 = -1;
g_joystick_native_fd = fd;
for(i = 0; i < 4; i++) {
g_paddle_val[i] = 32767;
}
g_paddle_buttons = 0xc;
joystick_update(0.0);
}
/* joystick_update_linux() called from paddles.c. Update g_paddle_val[] */
/* and g_paddle_buttons with current information */
void
joystick_update(double dcycs)
{
struct js_event js; /* the linux joystick event record */
int mask;
int val;
int num;
int type;
int ret;
int len;
int i;
/* suck up to 20 events, then give up */
len = sizeof(struct js_event);
for(i = 0; i < 20; i++) {
ret = read(g_joystick_native_fd, &js, len);
if(ret != len) {
/* just get out */
break;
}
type = js.type & ~JS_EVENT_INIT;
val = js.value;
num = js.number & 3; /* clamp to 0-3 */
switch(type) {
case JS_EVENT_BUTTON:
mask = 1 << num;
if(val) {
val = mask;
}
g_paddle_buttons = (g_paddle_buttons & ~mask) | val;
break;
case JS_EVENT_AXIS:
/* val is -32767 to +32767 */
g_paddle_val[num] = val;
break;
}
}
if(i > 0) {
paddle_update_trigger_dcycs(dcycs);
}
}
void
joystick_update_buttons()
{
}
// OG
void joystick_shut()
{
}