gbasys

annotate src/term.c @ 12:a6ddf338a111

line clipping
author John Tsiombikas <nuclear@member.fsf.org>
date Mon, 01 Feb 2016 04:41:27 +0200
parents 06726f0b8cd3
children
rev   line source
nuclear@0 1 /*
nuclear@7 2 gbasys - a gameboy advance hardware abstraction library
nuclear@7 3 Copyright (C) 2004-2014 John Tsiombikas <nuclear@member.fsf.org>
nuclear@0 4
nuclear@7 5 This program is free software: you can redistribute it and/or modify
nuclear@0 6 it under the terms of the GNU General Public License as published by
nuclear@7 7 the Free Software Foundation, either version 3 of the License, or
nuclear@0 8 (at your option) any later version.
nuclear@0 9
nuclear@0 10 This program is distributed in the hope that it will be useful,
nuclear@0 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@0 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
nuclear@0 13 GNU General Public License for more details.
nuclear@0 14
nuclear@0 15 You should have received a copy of the GNU General Public License
nuclear@7 16 along with this program. If not, see <http://www.gnu.org/licenses/>.
nuclear@0 17 */
nuclear@0 18 #include <stdlib.h>
nuclear@0 19 #include "term.h"
nuclear@0 20 #include "input.h"
nuclear@0 21 #include "signal.h"
nuclear@0 22 #include "intr.h"
nuclear@0 23
nuclear@0 24 static struct key_node *key_queue, *key_queue_tail;
nuclear@0 25
nuclear@0 26 static void key_handler(void);
nuclear@0 27
nuclear@0 28 void term_init(void) {
nuclear@0 29 mask(INTR_KEY);
nuclear@0 30 interrupt(INTR_KEY, key_handler);
nuclear@0 31 unmask(INTR_KEY);
nuclear@0 32
nuclear@0 33 key_queue = malloc(sizeof *key_queue);
nuclear@0 34 key_queue->next = 0;
nuclear@0 35 key_queue_tail = key_queue;
nuclear@0 36 }
nuclear@0 37
nuclear@0 38 static void noop(int sig) {}
nuclear@0 39
nuclear@0 40 int gba_getc(FILE *fp) {
nuclear@0 41 struct key_node *tmp;
nuclear@0 42 int c;
nuclear@0 43
nuclear@0 44 if(fp != stdin) panic("getc: only stdin valid");
nuclear@2 45
nuclear@3 46 save_signal(SIGTTIN);
nuclear@3 47 signal(SIGTTIN, noop);
nuclear@0 48 while(!key_queue->next) pause();
nuclear@3 49 restore_signal(SIGTTIN);
nuclear@0 50
nuclear@0 51 tmp = key_queue;
nuclear@0 52 key_queue = key_queue->next;
nuclear@0 53 free(tmp);
nuclear@0 54 return key_queue->key;
nuclear@0 55 }
nuclear@0 56
nuclear@0 57 static void key_handler(void) {
nuclear@0 58 int i, state;
nuclear@0 59 static unsigned long prev;
nuclear@0 60 unsigned long time;
nuclear@0 61
nuclear@0 62 time = get_millisec();
nuclear@0 63 if(time - prev < 100) return;
nuclear@0 64 prev = time;
nuclear@0 65
nuclear@0 66 state = get_key_state(KEY_ALL);
nuclear@0 67 for(i=0; i<KEY_COUNT; i++) {
nuclear@0 68 int bit = (1 << i);
nuclear@0 69 if(state & bit) {
nuclear@0 70 struct key_node *key = malloc(sizeof *key);
nuclear@0 71 key->key = bit;
nuclear@0 72 key->next = 0;
nuclear@0 73 key_queue_tail->next = key;
nuclear@0 74 key_queue_tail = key;
nuclear@0 75 }
nuclear@0 76 }
nuclear@3 77 raise(SIGTTIN);
nuclear@0 78 }