1 #include "map_objects.h"
10 static struct ChainMapObject * get_next_cmo (void *, char *, size_t, struct ChainMapObject *);
12 extern void readwrite_map_objects_dummy (void * dummy, FILE * file) {
13 // Dummy function for calls of (write|read)_map_objects on map objects without specific attributes.
16 extern void write_map_objects_monsterdata (void * start, FILE * file) {
17 // Write to file data specific tto map objects of type monster.
18 struct Monster * monster = (struct Monster *) start;
19 fputc(monster->hitpoints, file); }
21 extern void write_map_objects (void * start, FILE * file, void (* f) (void *, FILE *) ) {
22 // Write into file the map object chain starting at start, use f() for object-type specific data.
23 struct ChainMapObject * cmo;
24 for (cmo = start; cmo != 0; cmo = cmo->next) {
25 write_uint16_bigendian(cmo->pos.y + 1, file);
26 write_uint16_bigendian(cmo->pos.x + 1, file);
27 fputc(cmo->name, file);
29 write_uint16_bigendian(0, file); }
31 extern void read_map_objects_monsterdata (void * start, FILE * file) {
32 // Read from file data speciifc to map objects of type monster.
33 struct Monster * monster = (struct Monster *) start;
34 monster->hitpoints = fgetc(file); }
36 static struct ChainMapObject * get_next_cmo (void * start, char * still_at_start, size_t size, struct ChainMapObject * cmo) {
37 // Return pointer to map object of size "size". If first in chain ("still_at_start"), make "start" point to it.
38 if (*still_at_start) {
39 struct ChainMapObject * * z = start;
42 *still_at_start = 0; }
44 cmo->next = malloc(size);
48 extern void read_map_objects (void * start, FILE * file, size_t size, void (* f) (void *, FILE *) ) {
49 // Read from file chain of map objects starting at start, use f() for object-type specific data.
50 struct ChainMapObject * cmo;
52 char still_at_start = 1;
54 test = read_uint16_bigendian(file);
57 cmo = get_next_cmo(start, &still_at_start, size, cmo);
58 cmo->pos.y = test - 1;
59 cmo->pos.x = read_uint16_bigendian(file) - 1;
60 cmo->name = fgetc(file);
65 extern void build_map_objects_monsterdata (void * start) {
66 // Build data specific to map objects of type monster.
67 struct Monster * monster = (struct Monster *) start;
68 monster->cmo.name = 'A' + (rrand(0, 0) % 8);
69 monster->hitpoints = 5; }
71 extern void build_map_objects_itemdata (void * start) {
72 // Build data speciifc to map objects of type data.
73 struct Item * item = (struct Item *) start;
74 item->cmo.name = '#' + (rrand(0, 0) % 4); }
76 extern void build_map_objects (void * start, unsigned char n, size_t size, void (* f) (void *), struct Map * map) {
77 // Build chain of n map objects starting at start, use f() for object-specific data.
79 struct ChainMapObject * cmo;
80 char still_at_start = 1;
81 for (i = 0; i < n; i++) {
82 cmo = get_next_cmo(start, &still_at_start, size, cmo);
83 cmo->pos = find_passable_pos(map);
88 extern struct yx_uint16 find_passable_pos (struct Map * map) {
89 // Return a random passable position on map.
91 for (pos.y = pos.x = 0; 0 == is_passable(map, pos);) {
92 pos.y = rrand(0, 0) % map->size.y;
93 pos.x = rrand(0, 0) % map->size.x; }
96 extern char is_passable (struct Map * map, struct yx_uint16 pos) {
97 // Check if coordinate on (or beyond) map is accessible to actor movement.
99 if (0 <= pos.x && pos.x < map->size.x && 0 <= pos.y && pos.y < map->size.y)
100 if ('.' == map->cells[pos.y * map->size.x + pos.x])
104 extern void move_monster (struct World * world, struct Monster * monster) {
105 // Move monster in random direction, trigger fighting when hindered by player/monster.
106 char d = rrand(0, 0) % 5;
107 struct yx_uint16 t = mv_yx_in_dir (d, monster->cmo.pos);
108 if (yx_uint16_cmp (t, world->player->pos)) {
109 update_log (world, "\nThe monster hits you.");
110 world->player->hitpoints--;
111 if (0 == world->player->hitpoints)
112 update_log (world, "\nYou are dead.");
114 struct Monster * other_monster;
115 for (other_monster = world->monster; other_monster != 0; other_monster = other_monster->cmo.next) {
116 if (other_monster == monster)
118 if (yx_uint16_cmp (t, other_monster->cmo.pos)) {
119 update_log (world, "\nMonster bumps into monster.");
121 if (is_passable(world->map, t))
122 monster->cmo.pos = t; }
124 extern void move_player (struct World * world, char d) {
125 // Move player in direction d, update log and turn over to the enemy.
126 struct yx_uint16 t = mv_yx_in_dir (d, world->player->pos);
127 struct Monster * monster;
128 for (monster = world->monster; monster != 0; monster = monster->cmo.next)
129 if (yx_uint16_cmp (t, monster->cmo.pos)) {
130 update_log (world, "\nYou hit the monster.");
131 monster->hitpoints--;
132 if (0 == monster->hitpoints) {
133 update_log (world, "\nYou kill the monster.");
134 if (world->monster == monster)
135 world->monster = world->monster->cmo.next;
137 struct Monster * m_prev;
138 for (m_prev = world->monster; m_prev->cmo.next != monster; m_prev = m_prev->cmo.next);
139 m_prev->cmo.next = monster->cmo.next; }
141 turn_over (world, d);
143 char * msg = calloc(25, sizeof(char));
144 char * msg_content = "You fail to move";
146 if (NORTH == d) dir = "north";
147 else if (EAST == d) dir = "east" ;
148 else if (SOUTH == d) dir = "south";
149 else if (WEST == d) dir = "west" ;
150 if (is_passable(world->map, t)) {
151 msg_content = "You move";
152 world->player->pos = t; }
153 sprintf(msg, "\n%s %s.", msg_content, dir);
154 update_log (world, msg);
156 turn_over (world, d); }
158 extern void player_wait (struct World * world) {
159 // Make player wait one turn.
160 update_log (world, "\nYou wait.");
161 turn_over (world, 0); }