+int map_element_RND_to_BD_effect(int element_rnd, int action)
+{
+ static unsigned short mapping_RND_to_BD[NUM_FILE_ELEMENTS][NUM_ACTIONS];
+ static boolean mapping_initialized = FALSE;
+
+ if (!mapping_initialized)
+ {
+ int i, j;
+
+ // return "O_UNKNOWN" for all undefined elements in mapping array
+ for (i = 0; i < NUM_FILE_ELEMENTS; i++)
+ for (j = 0; j < NUM_ACTIONS; j++)
+ mapping_RND_to_BD[i][j] = O_UNKNOWN;
+
+ for (i = 0; bd_object_mapping_list[i].element_bd != -1; i++)
+ {
+ int element_rnd = bd_object_mapping_list[i].element_rnd;
+ int element_bd = bd_object_mapping_list[i].element_bd;
+ int action = bd_object_mapping_list[i].action;
+
+ if (action != -1)
+ mapping_RND_to_BD[element_rnd][action] = element_bd;
+ }
+
+ mapping_initialized = TRUE;
+ }
+
+ if (element_rnd < 0 || element_rnd >= NUM_FILE_ELEMENTS)
+ {
+ Warn("invalid RND element %d", element_rnd);
+
+ return O_UNKNOWN;
+ }
+
+ if (action < 0 || action >= NUM_ACTIONS)
+ {
+ Warn("invalid action %d", action);
+
+ return O_UNKNOWN;
+ }
+
+ return mapping_RND_to_BD[element_rnd][action];
+}
+
+int map_element_BD_to_RND_cave(int element_bd)
+{
+ static unsigned short mapping_BD_to_RND[O_MAX_ALL];
+ static boolean mapping_initialized = FALSE;
+
+ if (!mapping_initialized)
+ {
+ int i;
+
+ // return "EL_UNKNOWN" for all undefined elements in mapping array
+ for (i = 0; i < O_MAX_ALL; i++)
+ mapping_BD_to_RND[i] = EL_UNKNOWN;
+
+ for (i = 0; bd_object_mapping_list[i].element_bd != -1; i++)
+ if (bd_object_mapping_list[i].is_rnd_to_bd_mapping)
+ mapping_BD_to_RND[bd_object_mapping_list[i].element_bd] =
+ bd_object_mapping_list[i].element_rnd;
+
+ mapping_initialized = TRUE;
+ }
+
+ if (element_bd < 0 || element_bd >= O_MAX_ALL)
+ {
+ Warn("invalid BD element %d", element_bd);
+
+ return EL_UNKNOWN;
+ }
+
+ return mapping_BD_to_RND[element_bd];
+}
+
+int map_element_BD_to_RND_game(int element_bd)