3 #include "map_objects.h"
4 #include <stdlib.h> /* for malloc(), calloc(), free(), atoi() */
5 #include <stdint.h> /* for uint8_t */
6 #include <stdio.h> /* for FILE typedef */
7 #include <string.h> /* for strchr(), strlen(), memcpy(), strtok() */
8 #include "readwrite.h" /* for [read/write]_uint[8/16/23][_bigendian]() */
9 #include "misc.h" /* for textfile_sizes(), find_passable_pos() */
10 #include "main.h" /* for World struct */
11 #include "rexit.h" /* for err_exit() */
15 /* Return pointer to newly allocated map object struct of size "size". If first
16 * in map object chain ("first" pointing to !0), point "start" to it.
18 * Returns NULL instead of MapObj pointer if malloc() failed.
20 static struct MapObj * get_next_map_obj(void * start, char * first,
21 size_t size, struct MapObj * map_obj);
25 /* Map-object-type-specific helpers to (build|write|read)_map_objects(). */
26 static void build_map_objects_itemdata(struct MapObjDef * map_obj_def,
28 static void build_map_objects_monsterdata(struct MapObjDef * map_obj_def,
30 static uint8_t write_map_objects_monsterdata(void * start, FILE * file);
31 static uint8_t read_map_objects_monsterdata( void * start, FILE * file);
35 static struct MapObj * get_next_map_obj(void * start, char * first,
36 size_t size, struct MapObj * map_obj)
40 struct MapObj * * z = start;
41 map_obj = malloc(size);
47 map_obj->next = malloc(size);
48 map_obj = map_obj->next;
55 static void build_map_objects_itemdata(struct MapObjDef * map_obj_def,
58 struct Item * i = (struct Item *) start;
59 i->map_obj.type = map_obj_def->id;
64 static void build_map_objects_monsterdata(struct MapObjDef * map_obj_def,
67 struct Monster * m = (struct Monster *) start;
68 m->map_obj.type = map_obj_def->id;
69 struct MonsterDef * md = (struct MonsterDef *) map_obj_def;
70 m->hitpoints = md->hitpoints_start;
75 static uint8_t write_map_objects_monsterdata(void * start, FILE * file)
77 struct Monster * m = (struct Monster *) start;
78 return write_uint8(m->hitpoints, file);
83 static uint8_t read_map_objects_monsterdata (void * start, FILE * file)
85 struct Monster * m = (struct Monster *) start;
86 return read_uint8(file, &m->hitpoints);
91 extern void init_map_object_defs(struct World * world, char * filename)
93 char * err_o = "Trouble in init_map_object_defs() with fopen().";
94 char * err_s = "Trouble in init_map_object_defs() with textfile_sizes().";
95 char * err_m = "Trouble in init_map_object_defs() with malloc()/calloc().";
96 char * err_c = "Trouble in init_map_object_defs() with fclose().";
98 FILE * file = fopen(filename, "r");
99 exit_err(NULL == file, world, err_o);
101 exit_err(textfile_sizes(file, &linemax, NULL), world, err_s);
103 struct MapObjDef mod;
105 struct MonsterDef md;
107 world->monster_def = 0;
108 struct ItemDef * * p_p_id = &world->item_def;
109 struct MonsterDef * * p_p_md = &world->monster_def;
110 char * defline = malloc(linemax);
111 exit_err(NULL == defline, world, err_m);
114 while (fgets(defline, linemax, file))
117 mod.id = atoi(strtok(defline, delim));
118 mod.m_or_i = * strtok(NULL, delim);
119 mod.mapchar = * strtok(NULL, delim);
120 if ('i' == mod.m_or_i)
122 line_p = strtok(NULL, delim);
126 md.corpse_id = atoi(strtok(NULL, delim));
127 md.hitpoints_start = atoi(strtok(NULL, delim));
128 line_p = strtok(NULL, delim);
130 mod.desc = calloc(strlen(line_p), sizeof(char));
131 exit_err(NULL == mod.desc, world, err_m);
132 memcpy(mod.desc, line_p, strlen(line_p) - 1);
133 if ('i' == mod.m_or_i)
135 id.map_obj_def = mod;
136 * p_p_id = malloc(sizeof(struct ItemDef));
137 exit_err(NULL == p_p_id, world, err_m);
139 p_p_id = (struct ItemDef * *) * p_p_id;
143 md.map_obj_def = mod;
144 * p_p_md = malloc(sizeof(struct MonsterDef));
145 exit_err(NULL == p_p_md, world, err_m);
147 p_p_md = (struct MonsterDef * *) * p_p_md;
152 exit_err(fclose(file), world, err_c);
157 extern void free_item_defs(struct ItemDef * id_start)
159 if (0 != id_start->map_obj_def.next)
161 free_item_defs((struct ItemDef *) id_start->map_obj_def.next);
163 free(id_start->map_obj_def.desc);
170 extern void free_monster_defs(struct MonsterDef * md_start)
172 if (0 != md_start->map_obj_def.next)
174 free_monster_defs((struct MonsterDef *) md_start->map_obj_def.next);
176 free(md_start->map_obj_def.desc);
182 extern uint8_t write_map_objects(struct World * world, void * start,
185 struct MapObj * map_obj;
186 struct MapObjDef * mod;
187 for (map_obj = start; map_obj != 0; map_obj = map_obj->next)
189 if ( write_uint8(map_obj->type, file)
190 || write_uint16_bigendian(map_obj->pos.y + 1, file)
191 || write_uint16_bigendian(map_obj->pos.x + 1, file))
195 mod = get_map_obj_def(world, map_obj->type);
196 if ('m' == mod->m_or_i)
198 if (write_map_objects_monsterdata(map_obj, file))
204 return write_uint16_bigendian(0, file);
209 extern uint8_t read_map_objects(struct World * world, void * start, FILE * file)
211 char * err = "Trouble in read_map_objects() with get_next_map_obj().";
212 struct MapObj * map_obj;
213 struct MapObjDef * mod;
218 uint16_t read_uint16 = 0;
222 if (read_uint16_bigendian(file, &read_uint16))
226 if (0 == read_uint16)
230 fseek(file, pos, SEEK_SET);
231 if (read_uint8(file, &type))
235 mod = get_map_obj_def(world, type);
236 if ('m' == mod->m_or_i)
238 size = sizeof(struct Monster);
242 size = sizeof(struct Item);
244 map_obj = get_next_map_obj(start, &first, size, map_obj);
245 exit_err(NULL == map_obj, world, err);
246 map_obj->type = type;
247 if ( read_uint16_bigendian(file, &map_obj->pos.y)
248 || read_uint16_bigendian(file, &map_obj->pos.x))
254 if ('m' == mod->m_or_i)
256 if (read_map_objects_monsterdata(map_obj, file))
271 extern void * build_map_objects(struct World * world, void * start, char def_id,
274 char * err = "Trouble in build_map_objects() with get_next_map_obj().";
278 struct MapObjDef * mod = get_map_obj_def(world, def_id);
280 if ('i' == mod->m_or_i)
282 size = sizeof(struct Item);
286 size = sizeof(struct Monster);
288 for (i = 0; i < n; i++)
290 mo = get_next_map_obj(start, &first, size, mo);
291 exit_err(NULL == mo, world, err);
292 mo->pos = find_passable_pos(world->map);
293 if ('i' == mod->m_or_i)
295 build_map_objects_itemdata(mod, mo);
299 build_map_objects_monsterdata(mod, mo);
312 extern void free_items(struct Item * item)
318 free_items((struct Item *) item->map_obj.next);
324 extern void free_monsters(struct Monster * monster)
330 free_monsters((struct Monster *) monster->map_obj.next);
336 extern struct MapObjDef * get_map_obj_def(struct World * world, char def_id)
338 struct MapObjDef * d = NULL;
339 for (d = (struct MapObjDef *) world->monster_def;
340 d->id != def_id && 0 != d->next;
344 for (d = (struct MapObjDef *) world->item_def;
345 d->id != def_id && 0 != d->next;