--- /dev/null
+/* src/server/map_object_actions.c */
+
+#include "map_object_actions.h"
+#include <stdint.h> /* uint8_t, uint16_t */
+#include <stdio.h> /* sprintf() */
+#include <stdlib.h> /* free(), atoi() */
+#include <string.h> /* strlen(), strcmp(), memcpy(), strtok(), strncmp() */
+#include "../common/readwrite.h" /* textfile_sizes(), try_fopen(), try_fclose(),
+ * try_fgets()
+ */
+#include "../common/rexit.h" /* exit_err() */
+#include "../common/try_malloc.h" /* try_malloc() */
+#include "../common/yx_uint16.h" /* yx_uint16 struct */
+#include "cleanup.h" /* set_cleanup_flag() */
+#include "map_objects.h" /* structs MapObj, MapObjDef, get_player(),
+ * set_object_position(), own_map_object(),
+ * get_map_object_def()
+ */
+#include "map.h" /* is_passable() */
+#include "yx_uint16.h" /* mv_yx_in_dir(), yx_uint16_cmp() */
+#include "world.h" /* global world */
+
+
+
+/* Append "text" to game log, or a "." if "text" is the same as the last one. */
+static void update_log(char * text);
+
+/* If "name" fits "moa"->name, set "moa"->func to "func". */
+static uint8_t try_func_name(struct MapObjAct * moa,
+ char * name, void (* func) (struct MapObj *));
+
+/* One actor "wounds" another actor, decrementing his lifepoints and, if they
+ * reach zero in the process, killing it. Generates appropriate log message.
+ */
+static void actor_hits_actor(struct MapObj * hitter, struct MapObj * hitted);
+
+/* Bonus stuff to actor_*() to happen if actor==player. Mostly writing of log
+ * messages; _pick and _drop also decrement world.inventory_sel by 1 if >0.
+ */
+static void playerbonus_wait();
+static void playerbonus_move(char d, uint8_t passable);
+static void playerbonus_drop(uint8_t owns_none);
+static void playerbonus_pick(uint8_t picked);
+static void playerbonus_use(uint8_t no_object, uint8_t wrong_object);
+
+
+
+static void update_log(char * text)
+{
+ char * f_name = "update_log()";
+ uint16_t len_new = strlen(text);
+ uint16_t len_old = 0;
+ if (world.log)
+ {
+ len_old = strlen(world.log);
+ uint16_t last_nl = len_old - 1;
+ while (last_nl != 0)
+ {
+ if ('\n' == world.log[last_nl])
+ {
+ break;
+ }
+ last_nl--;
+ }
+ uint16_t last_stop = len_old - 1;
+ while (last_stop != 0)
+ {
+ if ('.' == world.log[last_stop] && '.' != world.log[last_stop - 1])
+ {
+ break;
+ }
+ last_stop--;
+ }
+ if ( (last_stop + 1) - last_nl == strlen(text)
+ && 0 == strncmp(world.log + last_nl, text, strlen(text)))
+ {
+ text = ".";
+ }
+ }
+ uint16_t len_whole = len_old + len_new + 1;
+ char * new_text = try_malloc(len_whole, f_name);
+ memcpy(new_text, world.log, len_old);
+ sprintf(new_text + len_old, "%s", text);
+ free(world.log);
+ world.log = new_text;
+}
+
+
+
+static uint8_t try_func_name(struct MapObjAct * moa,
+ char * name, void (* func) (struct MapObj *))
+{
+ if (0 == strcmp(moa->name, name))
+ {
+ moa->func = func;
+ return 1;
+ }
+ return 0;
+}
+
+
+
+static void actor_hits_actor(struct MapObj * hitter, struct MapObj * hitted)
+{
+ struct MapObjDef * mod_hitter = get_map_object_def(hitter->type);
+ struct MapObjDef * mod_hitted = get_map_object_def(hitted->type);
+ struct MapObj * player = get_player();
+ char * msg1 = "You";
+ char * msg2 = "wound";
+ char * msg3 = "you";
+ if (player != hitter)
+ {
+ msg1 = mod_hitter->name;
+ msg2 = "wounds";
+ }
+ if (player != hitted)
+ {
+ msg3 = mod_hitted->name;
+ }
+ uint8_t len = 1 + strlen(msg1) + 1 + strlen(msg2) + 1 + strlen(msg3) + 2;
+ char msg[len];
+ sprintf(msg, "\n%s %s %s.", msg1, msg2, msg3);
+ update_log(msg);
+ hitted->lifepoints--;
+ if (0 == hitted->lifepoints)
+ {
+ hitted->type = mod_hitted->corpse_id;
+ if (player == hitted)
+ {
+ update_log(" You die.");
+ return;
+ }
+ update_log(" It dies.");
+ if (player == hitter)
+ {
+ world.score = world.score + mod_hitted->lifepoints;
+ }
+ }
+}
+
+
+
+static void playerbonus_wait()
+{
+ update_log("\nYou wait.");
+}
+
+
+
+static void playerbonus_move(char d, uint8_t passable)
+{
+ char * dsc_dir = "north";
+ if ('E' == d)
+ {
+ dsc_dir = "east" ;
+ }
+ else if ('S' == d)
+ {
+ dsc_dir = "south";
+ }
+ else if ('W' == d)
+ {
+ dsc_dir = "west" ;
+ }
+ char * dsc_move = "You move ";
+ if (0 == passable)
+ {
+ dsc_move = "You fail to move ";
+ }
+ char msg[strlen(dsc_move) + strlen (dsc_dir) + 3];
+ sprintf(msg, "\n%s%s.", dsc_move, dsc_dir);
+ update_log(msg);
+}
+
+
+
+static void playerbonus_drop(uint8_t owns_none)
+{
+ if (0 != owns_none)
+ {
+ update_log("\nYou try to drop an object, but you own none.");
+ return;
+ }
+ update_log("\nYou drop an object.");
+}
+
+
+
+static void playerbonus_pick(uint8_t picked)
+{
+ if (picked)
+ {
+ update_log("\nYou pick up an object.");
+ return;
+ }
+ update_log("\nYou try to pick up an object, but there is none.");
+}
+
+
+
+static void playerbonus_use(uint8_t no_object, uint8_t wrong_object)
+{
+ if (no_object)
+ {
+ update_log("\nYou try to use an object, but you own none.");
+ return;
+ }
+ else if (wrong_object)
+ {
+ update_log("\nYou try to use this object, but fail.");
+ return;
+ }
+ update_log("\nYou consume MAGIC MEAT.");
+}
+
+
+
+extern void init_map_object_actions(char * path)
+{
+ char * f_name = "init_map_object_actions()";
+ FILE * file = try_fopen(path, "r", f_name);
+ uint16_t linemax = textfile_sizes(file, NULL);
+ char line[linemax + 1];
+ struct MapObjAct ** moa_ptr_ptr = &world.map_obj_acts;
+ char * delim = " ";
+ while (try_fgets(line, linemax + 1, file, f_name))
+ {
+ if ('\n' == line[0] || 0 == line[0])
+ {
+ break;
+ }
+ struct MapObjAct * moa = try_malloc(sizeof(struct MapObjAct), f_name);
+ moa->id = atoi(strtok(line, delim));
+ moa->effort = atoi(strtok(NULL, delim));
+ char * funcname = strtok(NULL, "\n");
+ uint8_t len_name = strlen(funcname) + 1;
+ moa->name = try_malloc(len_name, f_name);
+ memcpy(moa->name, funcname, len_name);
+ if (!( try_func_name(moa, "move", actor_move)
+ || try_func_name(moa, "pick_up", actor_pick)
+ || try_func_name(moa, "drop", actor_drop)
+ || try_func_name(moa, "use", actor_use)))
+ {
+ moa->func = actor_wait;
+ }
+ moa->next = NULL;
+ * moa_ptr_ptr = moa;
+ moa_ptr_ptr = &moa->next;
+ }
+ try_fclose(file, f_name);
+ set_cleanup_flag(CLEANUP_MAP_OBJECT_ACTS);
+}
+
+
+
+extern void free_map_object_actions(struct MapObjAct * moa)
+{
+ if (NULL == moa)
+ {
+ return;
+ }
+ free(moa->name);
+ free_map_object_actions(moa->next);
+ free(moa);
+}
+
+
+
+extern uint8_t get_moa_id_by_name(char * name)
+{
+ struct MapObjAct * moa = world.map_obj_acts;
+ while (NULL != moa)
+ {
+ if (0 == strcmp(moa->name, name))
+ {
+ break;
+ }
+ moa = moa->next;
+ }
+ exit_err(NULL == moa, "get_moa_id_name() did not find map object action.");
+ return moa->id;
+}
+
+
+
+extern void actor_wait(struct MapObj * mo)
+{
+ if (mo == get_player())
+ {
+ playerbonus_wait();
+ }
+}
+
+
+
+extern void actor_move(struct MapObj * mo)
+{
+ char d = mo->arg;
+ struct yx_uint16 target = mv_yx_in_dir(d, mo->pos);
+ struct MapObj * other_mo;
+ for (other_mo = world.map_objs; other_mo != 0; other_mo = other_mo->next)
+ {
+ if (0 == other_mo->lifepoints || other_mo == mo)
+ {
+ continue;
+ }
+ if (yx_uint16_cmp(&target, &other_mo->pos))
+ {
+ actor_hits_actor(mo, other_mo);
+ return;
+ }
+ }
+ uint8_t passable = is_passable(target);
+ if (passable)
+ {
+ set_object_position(mo, target);
+ }
+ if (mo == get_player())
+ {
+ playerbonus_move(d, passable);
+ }
+}
+
+
+
+extern void actor_drop(struct MapObj * mo)
+{
+ uint8_t owns_none = (NULL == mo->owns);
+ if (!owns_none)
+ {
+ uint8_t select = mo->arg;
+ struct MapObj * owned = mo->owns;
+ uint8_t i = 0;
+ for (; i != select; i++, owned = owned->next);
+ own_map_object(&world.map_objs, &mo->owns, owned->id);
+ }
+ if (mo == get_player())
+ {
+ playerbonus_drop(owns_none);
+ }
+}
+
+
+
+extern void actor_pick(struct MapObj * mo)
+{
+ struct MapObj * picked;
+ for (picked = world.map_objs; NULL != picked; picked = picked->next)
+ {
+ if (picked != mo && yx_uint16_cmp(&picked->pos, &mo->pos))
+ {
+ break;
+ }
+ }
+ if (NULL != picked)
+ {
+ own_map_object(&mo->owns, &world.map_objs, picked->id);
+ set_object_position(picked, mo->pos);
+ }
+ if (mo == get_player())
+ {
+ playerbonus_pick(NULL != picked);
+ }
+}
+
+
+
+extern void actor_use(struct MapObj * mo)
+{
+ uint8_t wrong_object = 1;
+ uint8_t no_object = (NULL == mo->owns);
+ if (!no_object)
+ {
+ uint8_t select = mo->arg;
+ uint8_t i = 0;
+ struct MapObj * selected = mo->owns;
+ for (; i != select; i++, selected = selected->next);
+ struct MapObjDef * mod = get_map_object_def(selected->type);
+ if (!strcmp("MAGIC MEAT", mod->name))
+ {
+ wrong_object = 0;
+ struct MapObj * next = selected->next;
+ free(selected);
+ if (0 < select)
+ {
+ select--;
+ selected = mo->owns;
+ for (i = 0; i != select; i++, selected = selected->next);
+ selected->next = next;
+ }
+ else
+ {
+ mo->owns = next;
+ }
+ mo->lifepoints++;
+ }
+ }
+ if (mo == get_player())
+ {
+ playerbonus_use(no_object, wrong_object);
+ }
+}
projects / plomrogue / blobdiff