gbasys
annotate src/term.c @ 12:a6ddf338a111
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| 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 } |