Added script bonuses in order to support official `AddReceiveItem_Equip n`

* `bonus2 bDropAddRace,r,x;` : Adds x% to player's drop rate when killing a monster with race r.
* `bonus2 bDropAddClass,c,x;` : Adds x% to player's drop rate when killing a monster with race c.

Signed-off-by: Cydh Ramdh <cydh@pservero.com>

doc/item_bonus.txt

@@ -411,6 +411,9 @@ bonus bBreakArmorRate,n; 		Adds a n/100% chance to break enemy's armor while att
 
 Monster drops
 -------------
+bonus2 bDropAddRace,r,x;	Adds x% to player's drop rate when killing a monster with race r.
+bonus2 bDropAddClass,c,x;	Adds x% to player's drop rate when killing a monster with race c.
+
 bonus3 bAddMonsterIdDropItem,iid,mid,n;	Adds a n/100% chance of dropping item iid when killing monster mid
 
 bonus2 bAddMonsterDropItem,iid,n;    	Adds a n/100% chance for item iid to be dropped when killing a monster

src/map/map.h

@@ -468,7 +468,7 @@ enum _sp {
 	SP_ADD_CLASS_DROP_ITEMGROUP, SP_ADDMAXWEIGHT, SP_ADD_ITEMGROUP_HEAL_RATE,  // 2071-2073
 	SP_HP_VANISH_RACE_RATE, SP_SP_VANISH_RACE_RATE, SP_ABSORB_DMG_MAXHP, SP_SUB_SKILL, SP_SUBDEF_ELE, // 2074-2078
 	SP_STATE_NORECOVER_RACE, SP_CRITICAL_RANGEATK, SP_MAGIC_ADDRACE2, SP_IGNORE_MDEF_RACE2_RATE, // 2079-2082
-	SP_WEAPON_ATK_RATE, SP_WEAPON_MATK_RATE, // 2083-2084
+	SP_WEAPON_ATK_RATE, SP_WEAPON_MATK_RATE, SP_DROP_ADDRACE, SP_DROP_ADDCLASS, // 2083-2086
 };
 
 enum _look {

src/map/mob.c

@@ -2527,14 +2527,29 @@ int mob_dead(struct mob_data *md, struct block_list *src, int type)
 				(int)(md->level - sd->status.base_level) >= 20)
 				drop_rate = (int)(drop_rate*1.25); // pk_mode increase drops if 20 level difference [Valaris]
 
-			// Increase drop rate if user has SC_ITEMBOOST
-			if (sd && sd->sc.data[SC_ITEMBOOST]) // now rig the drop rate to never be over 90% unless it is originally >90%.
-				drop_rate = max(drop_rate,cap_value((int)(0.5+drop_rate*(sd->sc.data[SC_ITEMBOOST]->val1)/100.),0,9000));
+			if (sd) {
+				int drop_rate_ = 0;
+
+				if (src) {
+					drop_rate_ += sd->dropaddclass[md->status.class_] + sd->dropaddclass[CLASS_ALL];
+					drop_rate_ += sd->dropaddrace[md->status.race] + sd->dropaddrace[RC_ALL];
+				}
+
+				// Increase drop rate if user has SC_ITEMBOOST
+				if (&sd->sc && sd->sc.data[SC_ITEMBOOST])
+					drop_rate_ += sd->sc.data[SC_ITEMBOOST]->val1;
+
+				drop_rate_ = (int)(0.5 + drop_rate * drop_rate_ / 100.);
+				// Now rig the drop rate to never be over 90% unless it is originally >90%.
+				drop_rate = i32max(drop_rate, cap_value(drop_rate_, 0, 9000));
+			}
+#ifdef VIP_ENABLE
 			// Increase item drop rate for VIP.
 			if (battle_config.vip_drop_increase && (sd && pc_isvip(sd))) {
 				drop_rate += (int)(0.5 + (drop_rate * battle_config.vip_drop_increase) / 100);
 				drop_rate = min(drop_rate,10000); //cap it to 100%
 			}
+#endif
 #ifdef RENEWAL_DROP
 			if( drop_modifier != 100 ) {
 				drop_rate = apply_rate(drop_rate, drop_modifier);

src/map/pc.c

@@ -3696,6 +3696,16 @@ void pc_bonus2(struct map_session_data *sd,int type,int type2,int val)
 		if (sd->state.lr_flag != 2)
 			sd->ignore_mdef_by_race2[type2] += val;
 		break;
+	case SP_DROP_ADDRACE: // bonus2 bDropAddRace,r,x;
+		PC_BONUS_CHK_RACE(type2, SP_DROP_ADDRACE);
+		if (sd->state.lr_flag != 2)
+			sd->dropaddrace[type2] += val;
+		break;
+	case SP_DROP_ADDCLASS: // bonus2 bDropAddClass,c,x;
+		PC_BONUS_CHK_CLASS(type2, SP_DROP_ADDCLASS);
+		if (sd->state.lr_flag != 2)
+			sd->dropaddclass[type2] += val;
+		break;
 	default:
 		if (running_npc_stat_calc_event) {
 			ShowWarning("pc_bonus2: unknown bonus type %d %d %d in OnPCStatCalcEvent!\n", type, type2, val);

src/map/pc.h

@@ -368,6 +368,8 @@ struct map_session_data {
 	short sp_gain_race[RC_MAX];
 	int magic_addrace2[RC2_MAX];
 	int ignore_mdef_by_race2[RC2_MAX];
+	int dropaddrace[RC_MAX];
+	int dropaddclass[CLASS_MAX];
 	// zeroed arrays end here.
 
 	// zeroed structures start here

src/map/script_constants.h

@@ -660,6 +660,8 @@
 	script_set_constant("bCriticalLong",SP_CRITICAL_RANGEATK,false);
 	script_set_constant("bMagicAddRace2", SP_MAGIC_ADDRACE2, false);
 	script_set_constant("bIgnoreMdefRace2Rate", SP_IGNORE_MDEF_RACE2_RATE, false);
+	script_set_constant("bDropAddRace", SP_DROP_ADDRACE, false);
+	script_set_constant("bDropAddClass", SP_DROP_ADDCLASS, false);
 
 	/* equip positions */
 	export_constant(EQI_HEAD_TOP);

src/map/status.c

@@ -3123,6 +3123,8 @@ int status_calc_pc_(struct map_session_data* sd, enum e_status_calc_opt opt)
 		+ sizeof(sd->ignore_mdef_by_class)
 		+ sizeof(sd->ignore_def_by_race)
 		+ sizeof(sd->sp_gain_race)
+		+ sizeof(sd->dropaddrace)
+		+ sizeof(sd->dropaddclass)
 		);
 
 	memset (&sd->right_weapon.overrefine, 0, sizeof(sd->right_weapon) - sizeof(sd->right_weapon.atkmods));