/*
* Create a new buffer and switch to it if successful.
*/
static void controller_new_buffer(void) {
unsigned int buf_num;
/* Find next available buffer number */
if (GCon.buffers[0] == NULL) {
buf_num = 0;
} else {
for (buf_num = 1; buf_num != 0; buf_num = (buf_num + 1) % CONTROLLER_MAX_BUFS) {
if (GCon.buffers[buf_num] == NULL)
break;
}
if (buf_num == 0) {
NOTIFY("No free buffers found! Failed to create new buffer");
return;
}
}
GCon.buffers[buf_num] = buffer_init(buf_num, terminal_rows, terminal_cols);
if (!GCon.buffers[buf_num]) {
NOTIFY("Failed to create new buffer");
return;
}
controller_set_current_buffer(buf_num);
handle_sigwinch(NULL, -1);
}
void signal_handler(int sig)
{
if (sig == SIGTSTP)
handle_sigtstp();
if (sig == SIGCONT)
handle_sigcont();
if (sig == SIGWINCH)
handle_sigwinch();
}
/*
* Initialize the global controller, this includes the first buffer.
*
* Returns:
* 0 - On success
* ENOMEM - Failed to allocate memory to register
*/
int controller_init(void) {
struct winsize winsize;
int result;
winsize = tty_get_winsize(STDIN);
terminal_rows = winsize.ws_row;
terminal_cols = winsize.ws_col;
GCon.in.fd = STDIN;
GCon.in.poll_flags = POLLIN | POLLPRI;
GCon.in.poll_callback = controller_cb_in;
GCon.out.fd = STDOUT;
GCon.out.poll_flags = 0;
GCon.out.poll_callback = controller_cb_out;
GCon.buf_out_used = 0;
result = loop_register((struct loop_fd *)&GCon.in);
if (result != 0)
return result;
result = loop_register((struct loop_fd *)&GCon.out);
if (result != 0)
goto out_deregister;
GCon.buffers[0] = buffer_init(0, terminal_rows, terminal_cols);
if (!GCon.buffers[0]) {
result = ENOMEM;
goto out_deregister;
}
controller_set_current_buffer(0);
for (int i = 0; i < ARRAY_SIZE(buffer_stack); i++)
buffer_stack[i] = -1;
loop_register_signal(SIGWINCH, handle_sigwinch);
/* Force the window size of the slave */
handle_sigwinch(NULL, -1);
return 0;
out_deregister:
loop_deregister((struct loop_fd *)&GCon.in);
return result;
}
