gbasys

annotate src/term.c @ 0:875ef6085efc

gbasys mercurial repository
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 04 Mar 2012 04:04:25 +0200
parents
children e3dc7705ad9c
rev   line source
nuclear@0 1 /*
nuclear@0 2 Copyright 2004 John Tsiombikas <nuclear@siggraph.org>
nuclear@0 3
nuclear@0 4 This file is part of libgba, a library for GameBoy Advance development.
nuclear@0 5
nuclear@0 6 This program is free software; you can redistribute it and/or modify
nuclear@0 7 it under the terms of the GNU General Public License as published by
nuclear@0 8 the Free Software Foundation; either version 2 of the License, or
nuclear@0 9 (at your option) any later version.
nuclear@0 10
nuclear@0 11 This program is distributed in the hope that it will be useful,
nuclear@0 12 but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@0 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
nuclear@0 14 GNU General Public License for more details.
nuclear@0 15
nuclear@0 16 You should have received a copy of the GNU General Public License
nuclear@0 17 along with this program; if not, write to the Free Software
nuclear@0 18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
nuclear@0 19 */
nuclear@0 20
nuclear@0 21 #include <stdlib.h>
nuclear@0 22 #include "term.h"
nuclear@0 23 #include "input.h"
nuclear@0 24 #include "signal.h"
nuclear@0 25 #include "intr.h"
nuclear@0 26
nuclear@0 27 static struct key_node *key_queue, *key_queue_tail;
nuclear@0 28
nuclear@0 29 static void key_handler(void);
nuclear@0 30
nuclear@0 31 void term_init(void) {
nuclear@0 32 mask(INTR_KEY);
nuclear@0 33 interrupt(INTR_KEY, key_handler);
nuclear@0 34 unmask(INTR_KEY);
nuclear@0 35
nuclear@0 36 key_queue = malloc(sizeof *key_queue);
nuclear@0 37 key_queue->next = 0;
nuclear@0 38 key_queue_tail = key_queue;
nuclear@0 39 }
nuclear@0 40
nuclear@0 41 static void noop(int sig) {}
nuclear@0 42
nuclear@0 43 int gba_getc(FILE *fp) {
nuclear@0 44 struct key_node *tmp;
nuclear@0 45 int c;
nuclear@0 46
nuclear@0 47 if(fp != stdin) panic("getc: only stdin valid");
nuclear@0 48
nuclear@0 49 save_signal(SIGIO);
nuclear@0 50 signal(SIGIO, noop);
nuclear@0 51 while(!key_queue->next) pause();
nuclear@0 52 restore_signal(SIGIO);
nuclear@0 53
nuclear@0 54 tmp = key_queue;
nuclear@0 55 key_queue = key_queue->next;
nuclear@0 56 free(tmp);
nuclear@0 57 return key_queue->key;
nuclear@0 58 }
nuclear@0 59
nuclear@0 60 static void key_handler(void) {
nuclear@0 61 int i, state;
nuclear@0 62 static unsigned long prev;
nuclear@0 63 unsigned long time;
nuclear@0 64
nuclear@0 65 time = get_millisec();
nuclear@0 66 if(time - prev < 100) return;
nuclear@0 67 prev = time;
nuclear@0 68
nuclear@0 69 state = get_key_state(KEY_ALL);
nuclear@0 70 for(i=0; i<KEY_COUNT; i++) {
nuclear@0 71 int bit = (1 << i);
nuclear@0 72 if(state & bit) {
nuclear@0 73 struct key_node *key = malloc(sizeof *key);
nuclear@0 74 key->key = bit;
nuclear@0 75 key->next = 0;
nuclear@0 76 key_queue_tail->next = key;
nuclear@0 77 key_queue_tail = key;
nuclear@0 78 }
nuclear@0 79 }
nuclear@0 80 raise(SIGIO);
nuclear@0 81 }