nuclear@0: /*
nuclear@7: gbasys - a gameboy advance hardware abstraction library
nuclear@7: Copyright (C) 2004-2014  John Tsiombikas <nuclear@member.fsf.org>
nuclear@0: 
nuclear@7: This program is free software: you can redistribute it and/or modify
nuclear@0: it under the terms of the GNU General Public License as published by
nuclear@7: the Free Software Foundation, either version 3 of the License, or
nuclear@0: (at your option) any later version.
nuclear@0: 
nuclear@0: This program is distributed in the hope that it will be useful,
nuclear@0: but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@0: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nuclear@0: GNU General Public License for more details.
nuclear@0: 
nuclear@0: You should have received a copy of the GNU General Public License
nuclear@7: along with this program.  If not, see <http://www.gnu.org/licenses/>.
nuclear@0: */
nuclear@0: #include <stdlib.h>
nuclear@0: #include "term.h"
nuclear@0: #include "input.h"
nuclear@0: #include "signal.h"
nuclear@0: #include "intr.h"
nuclear@0: 
nuclear@0: static struct key_node *key_queue, *key_queue_tail;
nuclear@0: 
nuclear@0: static void key_handler(void);
nuclear@0: 
nuclear@0: void term_init(void) {
nuclear@0: 	mask(INTR_KEY);
nuclear@0: 	interrupt(INTR_KEY, key_handler);
nuclear@0: 	unmask(INTR_KEY);
nuclear@0: 
nuclear@0: 	key_queue = malloc(sizeof *key_queue);
nuclear@0: 	key_queue->next = 0;
nuclear@0: 	key_queue_tail = key_queue;
nuclear@0: }
nuclear@0: 
nuclear@0: static void noop(int sig) {}
nuclear@0: 
nuclear@0: int gba_getc(FILE *fp) {
nuclear@0: 	struct key_node *tmp;
nuclear@0: 	int c;
nuclear@0: 
nuclear@0: 	if(fp != stdin) panic("getc: only stdin valid");
nuclear@2: 
nuclear@3: 	save_signal(SIGTTIN);
nuclear@3: 	signal(SIGTTIN, noop);
nuclear@0: 	while(!key_queue->next) pause();
nuclear@3: 	restore_signal(SIGTTIN);
nuclear@0: 
nuclear@0: 	tmp = key_queue;
nuclear@0: 	key_queue = key_queue->next;
nuclear@0: 	free(tmp);
nuclear@0: 	return key_queue->key;
nuclear@0: }
nuclear@0: 
nuclear@0: static void key_handler(void) {
nuclear@0: 	int i, state;
nuclear@0: 	static unsigned long prev;
nuclear@0: 	unsigned long time;
nuclear@0: 
nuclear@0: 	time = get_millisec();
nuclear@0: 	if(time - prev < 100) return;
nuclear@0: 	prev = time;
nuclear@0: 
nuclear@0: 	state = get_key_state(KEY_ALL);
nuclear@0: 	for(i=0; i<KEY_COUNT; i++) {
nuclear@0: 		int bit = (1 << i);
nuclear@0: 		if(state & bit) {
nuclear@0: 			struct key_node *key = malloc(sizeof *key);
nuclear@0: 			key->key = bit;
nuclear@0: 			key->next = 0;
nuclear@0: 			key_queue_tail->next = key;
nuclear@0: 			key_queue_tail = key;
nuclear@0: 		}
nuclear@0: 	}
nuclear@3: 	raise(SIGTTIN);
nuclear@0: }