1#include "gba-input.h"
 2
 3struct GBAInputMapImpl {
 4	int* map;
 5	uint32_t type;
 6};
 7
 8void GBAInputMapInit(struct GBAInputMap* map) {
 9	map->maps = 0;
10	map->numMaps = 0;
11}
12
13void GBAInputMapDeinit(struct GBAInputMap* map) {
14	size_t m;
15	for (m = 0; m < map->numMaps; ++m) {
16		free(map->maps[m].map);
17	}
18	free(map->maps);
19	map->maps = 0;
20	map->numMaps = 0;
21}
22
23enum GBAKey GBAInputMapKey(struct GBAInputMap* map, uint32_t type, int key) {
24	size_t m;
25	struct GBAInputMapImpl* impl = 0;
26	for (m = 0; m < map->numMaps; ++m) {
27		if (map->maps[m].type == type) {
28			impl = &map->maps[m];
29			break;
30		}
31	}
32	if (!impl || !impl->map) {
33		return GBA_KEY_NONE;
34	}
35
36	for (m = 0; m < GBA_KEY_MAX; ++m) {
37		if (impl->map[m] == key) {
38			return m;
39		}
40	}
41	return GBA_KEY_NONE;
42}
43
44void GBAInputBindKey(struct GBAInputMap* map, uint32_t type, int key, enum GBAKey input) {
45	struct GBAInputMapImpl* impl = 0;
46	if (map->numMaps == 0) {
47		map->maps = malloc(sizeof(*map->maps));
48		map->numMaps = 1;
49		impl = &map->maps[0];
50		impl->type = type;
51		impl->map = calloc(GBA_KEY_MAX, sizeof(enum GBAKey));
52	} else {
53		size_t m;
54		for (m = 0; m < map->numMaps; ++m) {
55			if (map->maps[m].type == type) {
56				impl = &map->maps[m];
57				break;
58			}
59		}
60	}
61	if (!impl) {
62		size_t m;
63		for (m = 0; m < map->numMaps; ++m) {
64			if (!map->maps[m].type) {
65				impl = &map->maps[m];
66				break;
67			}
68		}
69		if (impl) {
70			impl->type = type;
71			impl->map = calloc(GBA_KEY_MAX, sizeof(enum GBAKey));
72		} else {
73			map->maps = realloc(map->maps, sizeof(*map->maps) * map->numMaps * 2);
74			for (m = map->numMaps * 2 - 1; m > map->numMaps; --m) {
75				map->maps[m].type = 0;
76				map->maps[m].map = 0;
77			}
78			map->numMaps *= 2;
79			impl = &map->maps[m];
80			impl->type = type;
81			impl->map = calloc(GBA_KEY_MAX, sizeof(enum GBAKey));
82		}
83	}
84	impl->map[input] = key;
85}