- Supportive Skill Behavior for Mercenaries:

* Endow skills such as Aspersio and the 4 sage endows can only be cast on the mercenary if they are the master.
* Aid Potion does not currently work on mercenaries.
* Lex Aeterna only doubles damage of regular attacks. Skill damage from mercenaries are not doubled.

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@13184 54d463be-8e91-2dee-dedb-b68131a5f0ec

src/map/battle.c

@@ -395,19 +395,22 @@ int battle_calc_damage(struct block_list *src,struct block_list *bl,int damage,i
 		}
 
 		//Now damage increasing effects
-		if(sc->data[SC_AETERNA] && skill_num != PF_SOULBURN){
-			damage<<=1;
-			//Shouldn't end until Breaker's non-weapon part connects.
-			if (skill_num != ASC_BREAKER || !(flag&BF_WEAPON))
-				status_change_end( bl,SC_AETERNA,-1 );
+		if( sc->data[SC_AETERNA] && skill_num != PF_SOULBURN )
+		{
+			if( src->type != BL_MER || skill_num == 0 )
+				damage <<= 1; // Lex Aeterna only doubles damage of regular attacks from mercenaries
+
+			if( skill_num != ASC_BREAKER || !(flag&BF_WEAPON) )
+				status_change_end( bl,SC_AETERNA,-1 ); //Shouldn't end until Breaker's non-weapon part connects.
 		}
 
 		//Finally damage reductions....
-		if(sc->data[SC_ASSUMPTIO]){
-			if(map_flag_vs(bl->m))
-				damage=damage*2/3; //Receive 66% damage
+		if( sc->data[SC_ASSUMPTIO] )
+		{
+			if( map_flag_vs(bl->m) )
+				damage = damage*2/3; //Receive 66% damage
 			else
-				damage>>=1; //Receive 50% damage
+				damage >>= 1; //Receive 50% damage
 		}
 
 		if(sc->data[SC_DEFENDER] &&
@@ -3264,10 +3267,7 @@ int battle_check_target( struct block_list *src, struct block_list *target,int f
 		if (flag&(BCT_GUILD|BCT_ENEMY)) {
 			int s_guild = status_get_guild_id(s_bl);
 			int t_guild = status_get_guild_id(t_bl);
-			if (
-				!(map[m].flag.pvp && map[m].flag.pvp_noguild) &&
-				s_guild && t_guild && (s_guild == t_guild || guild_isallied(s_guild, t_guild))
-			)
+			if( !(map[m].flag.pvp && map[m].flag.pvp_noguild) && s_guild && t_guild && (s_guild == t_guild || guild_isallied(s_guild, t_guild)) )
 				state |= BCT_GUILD;
 			else
 				state |= BCT_ENEMY;

src/map/status.c

@@ -1125,10 +1125,10 @@ int status_check_skilluse(struct block_list *src, struct block_list *target, int
 	hide_flag = flag?OPTION_HIDE:(OPTION_HIDE|OPTION_CLOAK|OPTION_CHASEWALK);
 		
  	//You cannot hide from ground skills.
-	if(skill_get_ele(skill_num,1) == ELE_EARTH) //TODO: Need Skill Lv here :/
+	if( skill_get_ele(skill_num,1) == ELE_EARTH ) //TODO: Need Skill Lv here :/
 		hide_flag &= ~OPTION_HIDE;
 
-	switch (target->type)
+	switch( target->type )
 	{
 	case BL_PC:
 		{
@@ -1146,13 +1146,13 @@ int status_check_skilluse(struct block_list *src, struct block_list *target, int
 			return 1;
 		return 0;
 	case BL_HOM: 
-		//Can't use support skills on homun (only master/self can)
-		//Placed here instead of battle_check_target because support skill
-		//invocations don't call that function.
-		if (skill_num && battle_config.hom_setting&0x1 &&
-			skill_get_inf(skill_num)&INF_SUPPORT_SKILL &&
-			battle_get_master(target) != src)
-			return 0;
+	case BL_MER:
+		if( target->type == BL_HOM && skill_num && battle_config.hom_setting&0x1 && skill_get_inf(skill_num)&INF_SUPPORT_SKILL && battle_get_master(target) != src )
+			return 0; // Can't use support skills on Homunculus (only Master/Self)
+		if( target->type == BL_MER && (skill_num == PR_ASPERSIO || (skill_num >= SA_FLAMELAUNCHER && skill_num <= SA_SEISMICWEAPON)) && battle_get_master(target) != src )
+			return 0; // Can't use Weapon endow skills on Mercenary (only Master)
+		if( target->type == BL_MER && skill_num == AM_POTIONPITCHER )
+			return 0; // Can't use Potion Pitcher on Mercenaries
 	default:
 		//Check for chase-walk/hiding/cloaking opponents.
 		if (tsc && tsc->option&hide_flag && !(status->mode&(MD_BOSS|MD_DETECTOR)))