int tty_read(struct inode* inode, void* ptr, off_t pos, size_t len) {
if(unlikely(!inode || !ptr)) {
errno = EINVAL;
return -1;
}
if(unlikely(!inode->userdata)) {
errno = EINVAL;
return -1;
}
if(unlikely(!len))
return 0;
struct tty_context* tio = (struct tty_context*) inode->userdata;
uint8_t* buf = (uint8_t*) ptr;
int p = 0;
if(tio->pgrp != current_task->pgid)
sys_exit((1 << 31) | W_STOPCODE(SIGTTIN));
int fd = sys_open(TTY_DEFAULT_INPUT_DEVICE, O_RDONLY, 0);
if(fd < 0) {
errno = EIO;
return -1;
}
if(fifo_available(&tio->in)) {
char tmp[BUFSIZ];
for(int j = 0; (j = fifo_read(&tio->in, tmp, sizeof(tmp))) > 0;)
fifo_write(&tio->uin, tmp, j);
}
while(p < len) {
uint8_t ch;
if(fifo_available(&tio->uin))
fifo_read(&tio->uin, &ch, sizeof(ch));
else
ch = process_keyboard(inode, tio, fd, &p);
switch(ch) {
case 0:
continue;
case '\b':
case '\x7f':
if(tio->ios.c_lflag & ICANON) {
if(p > 0) {
fifo_peek(&tio->in, 1);
p--;
if(tio->ios.c_lflag & ECHOE)
ch = '\b';
else
ch = '\x7f';
if(tio->ios.c_lflag & ECHO)
tty_output_write(inode, &ch, 0, 1);
}
continue;
}
/* No processing */
ch = '\b';
break;
default:
break;
}
if(unlikely(ch < 32)) {
for(int i = 0; i < NCCS; i++) {
if(ch != tio->ios.c_cc[i])
continue;
fifo_write(&tio->in, &ch, 1);
p++;
ch = 0;
break;
}
if(unlikely(!ch))
continue;
}
if(!(tio->ios.c_iflag & IGNCR)) {
if(ch == '\n')
break;
}
char utf8[UTF8_MAX_LENGTH];
size_t utf8len = ucs2_to_utf8((int32_t) ch, utf8);
fifo_write(&tio->in, utf8, utf8len);
p += utf8len;
if(tio->ios.c_lflag & ECHO)
tty_output_write(inode, utf8, 0, utf8len);
}
if(p < len) {
if(!(tio->ios.c_iflag & IGNCR)) {
char ch = '\n';
fifo_write(&tio->in, &ch, 1);
p++;
if((tio->ios.c_lflag & ECHO) || (tio->ios.c_lflag & ICANON && tio->ios.c_lflag & ECHONL))
tty_output_write(inode, &ch, 0, 1);
}
} else
p = len;
if(fifo_available(&tio->in))
fifo_read(&tio->in, buf, p);
sys_close(fd);
return p;
}
/****** Handle Input From Keyboard ******/
void DMG_GamePad::handle_input(SDL_Event &event)
{
//Key Presses
if(event.type == SDL_KEYDOWN)
{
pad = event.key.keysym.sym;
process_keyboard(pad, true);
}
//Key Releases
else if(event.type == SDL_KEYUP)
{
pad = event.key.keysym.sym;
process_keyboard(pad, false);
}
//Joystick Button Presses
else if(event.type == SDL_JOYBUTTONDOWN)
{
pad = 100 + event.jbutton.button;
process_joystick(pad, true);
}
//Joystick Button Releases
else if(event.type == SDL_JOYBUTTONUP)
{
pad = 100 + event.jbutton.button;
process_joystick(pad, false);
}
//Joystick axes
else if(event.type == SDL_JOYAXISMOTION)
{
pad = 200 + (event.jaxis.axis * 2);
int axis_pos = event.jaxis.value;
if(axis_pos > 0) { pad++; }
else { axis_pos *= -1; }
if(axis_pos > config::dead_zone) { process_joystick(pad, true); }
else { process_joystick(pad, false); }
}
//Joystick hats
else if(event.type == SDL_JOYHATMOTION)
{
pad = 300;
pad += event.jhat.hat * 4;
switch(event.jhat.value)
{
case SDL_HAT_LEFT:
process_joystick(pad, true);
process_joystick(pad+2, false);
break;
case SDL_HAT_LEFTUP:
process_joystick(pad, true);
process_joystick(pad+2, true);
break;
case SDL_HAT_LEFTDOWN:
process_joystick(pad, true);
process_joystick(pad+3, true);
break;
case SDL_HAT_RIGHT:
process_joystick(pad+1, true);
process_joystick(pad+2, false);
break;
case SDL_HAT_RIGHTUP:
process_joystick(pad+1, true);
process_joystick(pad+2, true);
break;
case SDL_HAT_RIGHTDOWN:
process_joystick(pad+1, true);
process_joystick(pad+3, true);
break;
case SDL_HAT_UP:
process_joystick(pad+2, true);
process_joystick(pad, false);
break;
case SDL_HAT_DOWN:
process_joystick(pad+3, true);
process_joystick(pad, false);
break;
case SDL_HAT_CENTERED:
process_joystick(pad, false);
process_joystick(pad+2, false);
break;
}
}
}
