1 /* src/server/map_object_actions.c */
3 #include "map_object_actions.h"
4 #include <stddef.h> /* NULL */
5 #include <stdint.h> /* uint8_t, uint16_t, UINT8_MAx */
6 #include <stdio.h> /* sprintf(), ungetc() */
7 #include <stdlib.h> /* free(), atoi() */
8 #include <string.h> /* strlen(), strcmp(), memcpy(), strncmp() */
9 #include "../common/err_try_fgets.h" /* err_try_fgets(), err_line(),
10 * reset_err_try_fgets_counter()
12 #include "../common/readwrite.h" /* textfile_sizes(), try_fopen(), try_fclose(),
15 #include "../common/rexit.h" /* exit_err(), exit_trouble() */
16 #include "../common/try_malloc.h" /* try_malloc() */
17 #include "../common/yx_uint16.h" /* yx_uint16 struct */
18 #include "cleanup.h" /* set_cleanup_flag() */
19 #include "map_objects.h" /* structs MapObj, MapObjDef, get_player(),
20 * set_object_position(), own_map_object(),
21 * get_map_object_def()
23 #include "map.h" /* is_passable() */
24 #include "yx_uint16.h" /* mv_yx_in_dir(), yx_uint16_cmp() */
25 #include "world.h" /* global world */
29 /* Append "text" to game log, or a "." if "text" is the same as the last one. */
30 static void update_log(char * text);
32 /* If "name" fits "moa"->name, set "moa"->func to "func". */
33 static uint8_t try_func_name(struct MapObjAct * moa,
34 char * name, void (* func) (struct MapObj *));
36 /* One actor "wounds" another actor, decrementing his lifepoints and, if they
37 * reach zero in the process, killing it. Generates appropriate log message.
39 static void actor_hits_actor(struct MapObj * hitter, struct MapObj * hitted);
41 /* Bonus stuff to actor_*() to happen if actor==player. Mostly writing of log
42 * messages; _pick and _drop also decrement world.inventory_sel by 1 if >0.
44 static void playerbonus_wait();
45 static void playerbonus_move(char d, uint8_t passable);
46 static void playerbonus_drop(uint8_t owns_none);
47 static void playerbonus_pick(uint8_t picked);
48 static void playerbonus_use(uint8_t no_object, uint8_t wrong_object);
52 static void update_log(char * text)
54 char * f_name = "update_log()";
55 uint16_t len_new = strlen(text);
59 len_old = strlen(world.log);
60 uint16_t last_nl = len_old - 1;
63 if ('\n' == world.log[last_nl])
69 uint16_t last_stop = len_old - 1;
70 while (last_stop != 0)
72 if ('.' == world.log[last_stop] && '.' != world.log[last_stop - 1])
78 if ( (last_stop + 1) - last_nl == strlen(text)
79 && 0 == strncmp(world.log + last_nl, text, strlen(text)))
84 uint16_t len_whole = len_old + len_new + 1;
85 char * new_text = try_malloc(len_whole, f_name);
86 memcpy(new_text, world.log, len_old);
87 sprintf(new_text + len_old, "%s", text);
94 static uint8_t try_func_name(struct MapObjAct * moa,
95 char * name, void (* func) (struct MapObj *))
97 if (0 == strcmp(moa->name, name))
107 static void actor_hits_actor(struct MapObj * hitter, struct MapObj * hitted)
109 struct MapObjDef * mod_hitter = get_map_object_def(hitter->type);
110 struct MapObjDef * mod_hitted = get_map_object_def(hitted->type);
111 struct MapObj * player = get_player();
113 char * msg2 = "wound";
115 if (player != hitter)
117 msg1 = mod_hitter->name;
120 if (player != hitted)
122 msg3 = mod_hitted->name;
124 uint8_t len = 1 + strlen(msg1) + 1 + strlen(msg2) + 1 + strlen(msg3) + 2;
126 sprintf(msg, "\n%s %s %s.", msg1, msg2, msg3);
128 hitted->lifepoints--;
129 if (0 == hitted->lifepoints)
131 hitted->type = mod_hitted->corpse_id;
132 if (player == hitted)
134 update_log(" You die.");
137 update_log(" It dies.");
138 if (player == hitter)
140 world.score = world.score + mod_hitted->lifepoints;
147 static void playerbonus_wait()
149 update_log("\nYou wait.");
154 static void playerbonus_move(char d, uint8_t passable)
156 char * dsc_dir = "north";
169 char * dsc_move = "You move ";
172 dsc_move = "You fail to move ";
174 char msg[strlen(dsc_move) + strlen (dsc_dir) + 3];
175 sprintf(msg, "\n%s%s.", dsc_move, dsc_dir);
181 static void playerbonus_drop(uint8_t owns_none)
185 update_log("\nYou try to drop an object, but you own none.");
188 update_log("\nYou drop an object.");
193 static void playerbonus_pick(uint8_t picked)
197 update_log("\nYou pick up an object.");
200 update_log("\nYou try to pick up an object, but there is none.");
205 static void playerbonus_use(uint8_t no_object, uint8_t wrong_object)
209 update_log("\nYou try to use an object, but you own none.");
212 else if (wrong_object)
214 update_log("\nYou try to use this object, but fail.");
217 update_log("\nYou consume MAGIC MEAT.");
222 extern void init_map_object_actions()
224 char * f_name = "init_map_object_actions()";
225 FILE * file = try_fopen(world.path_map_obj_acts, "r", f_name);
226 uint16_t linemax = textfile_sizes(file, NULL);
227 char line[linemax + 1];
228 struct MapObjAct ** moa_ptr_ptr = &world.map_obj_acts;
229 char * context = "Failed reading map object actions config file. ";
230 char * err_toolarge = "Value is too large.";
231 char * err_uniq = "Declaration of ID already used.";
232 reset_err_try_fgets_counter();
235 int test_for_end = try_fgetc(file, f_name);
236 if (EOF == test_for_end || '\n' == test_for_end)
240 exit_trouble(EOF == ungetc(test_for_end, file), f_name, "ungetc()");
241 struct MapObjAct * moa = try_malloc(sizeof(struct MapObjAct), f_name);
242 err_try_fgets(line, linemax, file, context, "nfi");
243 err_line(atoi(line) > UINT8_MAX, line, context, err_toolarge);
244 moa->id = atoi(line);
245 struct MapObjAct * moa_test = world.map_obj_acts;
246 for (; NULL != moa_test; moa_test = moa_test->next)
248 err_line(moa->id == moa_test->id, line, context, err_uniq);
250 err_try_fgets(line, linemax, file, context, "0nfi");
251 err_line(atoi(line) > UINT8_MAX, line, context, err_toolarge);
252 moa->effort = atoi(line);
253 err_try_fgets(line, linemax, file, context, "0nf");
254 line[strlen(line) - 1] = '\0';
255 uint8_t len_name = strlen(line) + 1;
256 moa->name = try_malloc(len_name, f_name);
257 memcpy(moa->name, line, len_name);
258 if (!( try_func_name(moa, "move", actor_move)
259 || try_func_name(moa, "pick_up", actor_pick)
260 || try_func_name(moa, "drop", actor_drop)
261 || try_func_name(moa, "use", actor_use)))
263 moa->func = actor_wait;
267 moa_ptr_ptr = &moa->next;
268 err_try_fgets(line, linemax, file, context, "d");
270 try_fclose(file, f_name);
271 set_cleanup_flag(CLEANUP_MAP_OBJECT_ACTS);
276 extern void free_map_object_actions(struct MapObjAct * moa)
283 free_map_object_actions(moa->next);
289 extern uint8_t get_moa_id_by_name(char * name)
291 struct MapObjAct * moa = world.map_obj_acts;
294 if (0 == strcmp(moa->name, name))
300 exit_err(NULL==moa, "get_moa_id_by_name() did not find map object action.");
306 extern void actor_wait(struct MapObj * mo)
308 if (mo == get_player())
316 extern void actor_move(struct MapObj * mo)
319 struct yx_uint16 target = mv_yx_in_dir(d, mo->pos);
320 struct MapObj * other_mo;
321 for (other_mo = world.map_objs; other_mo != 0; other_mo = other_mo->next)
323 if (0 == other_mo->lifepoints || other_mo == mo)
327 if (yx_uint16_cmp(&target, &other_mo->pos))
329 actor_hits_actor(mo, other_mo);
333 uint8_t passable = is_passable(target);
336 set_object_position(mo, target);
338 if (mo == get_player())
340 playerbonus_move(d, passable);
346 extern void actor_drop(struct MapObj * mo)
348 uint8_t owns_none = (NULL == mo->owns);
351 uint8_t select = mo->arg;
352 struct MapObj * owned = mo->owns;
354 for (; i != select; i++, owned = owned->next);
355 own_map_object(&world.map_objs, &mo->owns, owned->id);
357 if (mo == get_player())
359 playerbonus_drop(owns_none);
365 extern void actor_pick(struct MapObj * mo)
367 struct MapObj * picked = NULL;
368 struct MapObj * mo_i;
369 for (mo_i = world.map_objs; NULL != mo_i; mo_i = mo_i->next)
371 if (mo_i != mo && yx_uint16_cmp(&mo_i->pos, &mo->pos))
378 own_map_object(&mo->owns, &world.map_objs, picked->id);
379 set_object_position(picked, mo->pos);
381 if (mo == get_player())
383 playerbonus_pick(NULL != picked);
389 extern void actor_use(struct MapObj * mo)
391 uint8_t wrong_object = 1;
392 uint8_t no_object = (NULL == mo->owns);
395 uint8_t select = mo->arg;
397 struct MapObj * selected = mo->owns;
398 for (; i != select; i++, selected = selected->next);
399 struct MapObjDef * mod = get_map_object_def(selected->type);
400 if (!strcmp("MAGIC MEAT", mod->name))
403 struct MapObj * next = selected->next;
409 for (i = 0; i != select; i++, selected = selected->next);
410 selected->next = next;
419 if (mo == get_player())
421 playerbonus_use(no_object, wrong_object);