Refactored/fixed race handling for bonuses that store it as a bitmask

- The following bonuses now work correctly with RC_DemiPlayer,
  RC_NonDemiPlayer, RC_NonDemiHuman, RC_Nonplayer:
  * bIgnoreDefRace
  * bIgnoreMdefRace
  * bDefRatioAtkRace
  * bAddMonsterDropChainItem (bonus3)
  * bAddMonsterDropItem (bonus3)
- A new function (map->race_id2mask) is provided, to easily and
  efficiently generate a bitmask from a race ID.
- The RC_ALL race ID is mapped to RC_BOSS and RC_NONBOSS, for backwards
  compatibility.

Signed-off-by: Haru <haru@dotalux.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/src/map/map.c b/src/map/map.c
index fff1593a4..7a0dde260 100644
--- a/src/map/map.c
+++ b/src/map/map.c
@@ -2040,6 +2040,37 @@ struct mob_data * map_id2boss(int id)
 	return (struct mob_data*)idb_get(map->bossid_db,id);
 }
 
+/**
+ * Returns the equivalent bitmask to the given race ID.
+ *
+ * @param race A race identifier (@see enum Race)
+ *
+ * @return The equivalent race bitmask.
+ */
+uint32 map_race_id2mask(int race)
+{
+	if (race >= RC_FORMLESS && race < RC_MAX)
+		return 1 << race;
+
+	if (race == RC_ALL)
+		return RCMASK_ALL;
+
+	if (race == RC_NONPLAYER)
+		return RCMASK_NONPLAYER;
+
+	if (race == RC_NONDEMIHUMAN)
+		return RCMASK_NONDEMIHUMAN;
+
+	if (race == RC_DEMIPLAYER)
+		return RCMASK_DEMIPLAYER;
+
+	if (race == RC_NONDEMIPLAYER)
+		return RCMASK_NONDEMIPLAYER;
+
+	ShowWarning("map_race_id2mask: Invalid race: %d\n", race);
+	return RCMASK_NONE;
+}
+
 /// Applies func to all the players in the db.
 /// Stops iterating if func returns -1.
 void map_vforeachpc(int (*func)(struct map_session_data* sd, va_list args), va_list args) {
@@ -6127,6 +6158,7 @@ void map_defaults(void) {
 	map->nick2sd = map_nick2sd;
 	map->getmob_boss = map_getmob_boss;
 	map->id2boss = map_id2boss;
+	map->race_id2mask = map_race_id2mask;
 	// reload config file looking only for npcs
 	map->reloadnpc = map_reloadnpc;