追加Aegis的0偷BUG模拟

conf/battle/pandas.conf

@@ -493,4 +493,12 @@ mob_default_damagemotion: 0
 // 默认值为: yes
 mob_setunitdata_persistence: yes
 
+//是否开启0偷？
+//模拟Aegis服早期的著名BUG：0偷效果
+//当盗贼技能偷窃的成功率恰好为0时，有极小的几率能偷窃成功，
+//此时偷窃到的物品几率分布是一个相等的平均值，
+//如果偷窃到的物品指向一个不存在(物品id为0)的物品时，会获得苹果。
+//0偷的成功几率(最大10000 = 100%)，0 关闭
+steal_special: 0
+
 // PYHELP - BATTLECONFIG - INSERT POINT - <Section 4>

src/config/pandas.hpp

@@ -372,6 +372,8 @@
 	// 是否启用 mob_setunitdata_persistence 配置选项及其功能 [Sola丶小克]
 	// 此选项用于控制是否高优先级持久化保存 setunitdata 对魔物的设置
 	#define Pandas_BattleConfig_Mob_SetUnitData_Persistence
+	// 是否开启0偷及设置几率(当偷窃几率正好为0时的特殊几率)
+	#define Pandas_BattleConfig_Steal_Special
 	// PYHELP - BATTLECONFIG - INSERT POINT - <Section 1>
 #endif // Pandas_BattleConfigure
 

src/map/battle.cpp

@@ -11083,6 +11083,9 @@ static const struct _battle_data {
 #ifdef Pandas_BattleConfig_Mob_SetUnitData_Persistence
 	{ "mob_setunitdata_persistence",        &battle_config.mob_setunitdata_persistence,     1,      0,      1,              },
 #endif // Pandas_BattleConfig_Mob_SetUnitData_Persistence
+#ifdef Pandas_BattleConfig_Steal_Special
+	{ "steal_special",        &battle_config.steal_special,     0,      0,      10000,              },
+#endif // Pandas_BattleConfig_Steal_Special
 	// PYHELP - BATTLECONFIG - INSERT POINT - <Section 3>
 #include <custom/battle_config_init.inc>
 };

src/map/battle.hpp

@@ -819,6 +819,9 @@ struct Battle_Config
 #endif // Pandas_BattleConfig_MobDB_DamageMotion_Min
 #ifdef Pandas_BattleConfig_Mob_SetUnitData_Persistence
 	int mob_setunitdata_persistence;		// 是否高优先级持久化保存 setunitdata 对魔物的设置
+#endif // Pandas_BattleConfig_Mob_SetUnitData_Persistence
+#ifdef Pandas_BattleConfig_Steal_Special
+	int steal_special;		// 开启0偷及设置几率
 #endif // Pandas_BattleConfig_Mob_SetUnitData_Persistence
 	// PYHELP - BATTLECONFIG - INSERT POINT - <Section 2>
 #include <custom/battle_config_struct.inc>

src/map/pc.cpp

@@ -7179,6 +7179,10 @@ bool pc_steal_item(map_session_data *sd,struct block_list *bl, uint16 skill_lv)
 	unsigned char flag = 0;
 	struct status_data *sd_status, *md_status;
 	struct mob_data *md;
+//0偷几率判定值
+#ifdef Pandas_BattleConfig_Steal_Special
+	bool rate_special;
+#endif
 
 	if(!sd || !bl || bl->type!=BL_MOB)
 		return false;
@@ -7207,17 +7211,30 @@ bool pc_steal_item(map_session_data *sd,struct block_list *bl, uint16 skill_lv)
 	rate = (static_cast<double>(sd_status->dex) - static_cast<double>(md_status->dex)) / 2 + skill_lv * 6 + 4;
 #endif // Pandas_Fix_StealItem_Formula_Overflow
 	rate += sd->bonus.add_steal_rate;
+//偷窃几率正好为0的情况下，0偷几率
+#ifdef Pandas_BattleConfig_Steal_Special
+	rate_special = !rate && rnd() % 10000 < battle_config.steal_special;
+#endif
 
 	if( rate < 1
 #ifdef RENEWAL
 		|| rnd()%100 >= rate
+#endif
+#ifdef Pandas_BattleConfig_Steal_Special //追加0偷判定
+		&& !rate_special
 #endif
 	)
 		return false;
 
 	// Try dropping one item, in the order from first to last possible slot.
 	// Droprate is affected by the skill success rate.
 	for( i = 0; i < MAX_MOB_DROP; i++ )
+#ifdef Pandas_BattleConfig_Steal_Special     //0偷物品选择
+	if(rate_special) {
+		if( !md->db->dropitem[i].steal_protected && rnd() % MAX_MOB_DROP < 1) 
+			break;
+	} else
+#endif
 		if( item_db.exists(md->db->dropitem[i].nameid) && !md->db->dropitem[i].steal_protected && rnd() % 10000 < md->db->dropitem[i].rate
 #ifndef RENEWAL
 		* rate/100.
@@ -7226,7 +7243,11 @@ bool pc_steal_item(map_session_data *sd,struct block_list *bl, uint16 skill_lv)
 			break;
 	if( i == MAX_MOB_DROP )
 		return false;
-
+#ifdef Pandas_BattleConfig_Steal_Special     //物品不存在的情况下偷到苹果
+	if (!item_db.exists(md->db->dropitem[i].nameid))
+		itemid = 512;
+	else
+#endif
 	itemid = md->db->dropitem[i].nameid;
 	struct item tmp_item = {};
 	tmp_item.nameid = itemid;