Cleaned up hat effect code (#5462)

Converted from self written container to std::vector.
Converted clif code to struct usage.

src/map/clif.cpp

@@ -80,6 +80,9 @@ static struct eri *delay_clearunit_ers;
 
 struct s_packet_db packet_db[MAX_PACKET_DB + 1];
 int packet_db_ack[MAX_ACK_FUNC + 1];
+// Reuseable global packet buffer to prevent too many allocations
+// Take socket.cpp::socket_max_client_packet into consideration
+static int8 packet_buffer[UINT16_MAX];
 unsigned long color_table[COLOR_MAX];
 
 #include "clif_obfuscation.hpp"
@@ -20553,9 +20556,7 @@ void clif_navigateTo(struct map_session_data *sd, const char* mapname, uint16 x,
 /// Send hat effects to the client (ZC_HAT_EFFECT).
 /// 0A3B <Length>.W <AID>.L <Status>.B { <HatEffectId>.W }
 void clif_hat_effects( struct map_session_data* sd, struct block_list* bl, enum send_target target ){
-#if PACKETVER >= 20150513
-	unsigned char* buf;
-	int len,i;
+#if PACKETVER_MAIN_NUM >= 20150507 || PACKETVER_RE_NUM >= 20150429 || defined(PACKETVER_ZERO)
 	struct map_session_data *tsd;
 	struct block_list* tbl;
 
@@ -20567,39 +20568,40 @@ void clif_hat_effects( struct map_session_data* sd, struct block_list* bl, enum
 		tbl = bl;
 	}
 
-	if( !tsd->hatEffectCount )
-		return;
+	nullpo_retv( tsd );
 
-	len = 9 + tsd->hatEffectCount * 2;
+	if( tsd->hatEffects.empty() ){
+		return;
+	}
 
-	buf = (unsigned char*)aMalloc( len );
+	struct PACKET_ZC_HAT_EFFECT* p = (struct PACKET_ZC_HAT_EFFECT*)packet_buffer;
 
-	WBUFW(buf,0) = 0xa3b;
-	WBUFW(buf,2) = len;
-	WBUFL(buf,4) = tsd->bl.id;
-	WBUFB(buf,8) = 1;
+	p->packetType = HEADER_ZC_HAT_EFFECT;
+	p->packetLength = (int16)( sizeof( struct PACKET_ZC_HAT_EFFECT ) + sizeof( int16 ) * tsd->hatEffects.size() );
+	p->aid = tsd->bl.id;
+	p->status = 1;
 
-	for( i = 0; i < tsd->hatEffectCount; i++ ){
-		WBUFW(buf,9+i*2) = tsd->hatEffectIDs[i];
+	for( size_t i = 0; i < tsd->hatEffects.size(); i++ ){
+		p->effects[i] = tsd->hatEffects[i];
 	}
 
-	clif_send(buf, len,tbl,target);
-
-	aFree(buf);
+	clif_send( p, p->packetLength, tbl, target );
 #endif
 }
 
 void clif_hat_effect_single( struct map_session_data* sd, uint16 effectId, bool enable ){
-#if PACKETVER >= 20150513
-	unsigned char buf[13];
+#if PACKETVER_MAIN_NUM >= 20150507 || PACKETVER_RE_NUM >= 20150429 || defined(PACKETVER_ZERO)
+	nullpo_retv( sd );
+
+	struct PACKET_ZC_HAT_EFFECT* p = (struct PACKET_ZC_HAT_EFFECT*)packet_buffer;
 
-	WBUFW(buf,0) = 0xa3b;
-	WBUFW(buf,2) = 13;
-	WBUFL(buf,4) = sd->bl.id;
-	WBUFB(buf,8) = enable;
-	WBUFL(buf,9) = effectId;
+	p->packetType = HEADER_ZC_HAT_EFFECT;
+	p->packetLength = (int16)( sizeof( struct PACKET_ZC_HAT_EFFECT ) + sizeof( int16 ) );
+	p->aid = sd->bl.id;
+	p->status = enable;
+	p->effects[0] = effectId;
 
-	clif_send(buf,13,&sd->bl,AREA);
+	clif_send( p, p->packetLength, &sd->bl, AREA );
 #endif
 }
 

src/map/clif_packetdb.hpp

@@ -2248,10 +2248,12 @@
 	packet(0x0A2D,-1); // ZC_EQUIPWIN_MICROSCOPE_V6
 #endif
 
+#if PACKETVER_MAIN_NUM >= 20150507 || PACKETVER_RE_NUM >= 20150429 || defined(PACKETVER_ZERO)
+	packet( HEADER_ZC_HAT_EFFECT, -1 );
+#endif
+
 // 2015-05-13aRagexe
 #if PACKETVER >= 20150513
-	// New Packets
-	packet(0xA3B,-1); // ZC_HAT_EFFECT
 	// RODEX Mail system
 	packet(0x09E7,3); // ZC_NOTIFY_UNREADMAIL
 	parseable_packet(0x09E8,11,clif_parse_Mail_refreshinbox,2,3); // CZ_OPEN_MAILBOX

src/map/pc.cpp

@@ -1663,9 +1663,8 @@ bool pc_authok(struct map_session_data *sd, uint32 login_id2, time_t expiration_
 	// Initialize BG queue
 	sd->bg_queue_id = 0;
 
-#if PACKETVER >= 20150513
-	sd->hatEffectIDs = NULL;
-	sd->hatEffectCount = 0;
+#if PACKETVER_MAIN_NUM >= 20150507 || PACKETVER_RE_NUM >= 20150429 || defined(PACKETVER_ZERO)
+	sd->hatEffects = {};
 #endif
 
 	sd->catch_target_class = PET_CATCH_FAIL;

src/map/pc.hpp

@@ -787,9 +787,8 @@ struct map_session_data {
 
 	short setlook_head_top, setlook_head_mid, setlook_head_bottom, setlook_robe; ///< Stores 'setlook' script command values.
 
-#if PACKETVER >= 20150513
-	uint32* hatEffectIDs;
-	uint8 hatEffectCount;
+#if PACKETVER_MAIN_NUM >= 20150507 || PACKETVER_RE_NUM >= 20150429 || defined(PACKETVER_ZERO)
+	std::vector<int16> hatEffects;
 #endif
 
 	struct{

src/map/script.cpp

@@ -23191,47 +23191,34 @@ BUILDIN_FUNC(recalculatestat) {
 }
 
 BUILDIN_FUNC(hateffect){
-#if PACKETVER >= 20150513
+#if PACKETVER_MAIN_NUM >= 20150507 || PACKETVER_RE_NUM >= 20150429 || defined(PACKETVER_ZERO)
 	struct map_session_data* sd;
-	bool enable;
-	int i, effectID;
 
 	if( !script_rid2sd(sd) )
 		return SCRIPT_CMD_FAILURE;
 
-	effectID = script_getnum(st,2);
-	enable = script_getnum(st,3) ? true : false;
+	int16 effectID = script_getnum(st,2);
+	bool enable = script_getnum(st,3) ? true : false;
 
 	if( effectID <= HAT_EF_MIN || effectID >= HAT_EF_MAX ){
 		ShowError( "buildin_hateffect: unsupported hat effect id %d\n", effectID );
 		return SCRIPT_CMD_FAILURE;
 	}
 
-	ARR_FIND( 0, sd->hatEffectCount, i, sd->hatEffectIDs[i] == effectID );
+	auto it = util::vector_get( sd->hatEffects, effectID );
 
 	if( enable ){
-		if( i < sd->hatEffectCount ){
+		if( it != sd->hatEffects.end() ){
 			return SCRIPT_CMD_SUCCESS;
 		}
 
-		RECREATE(sd->hatEffectIDs,uint32,sd->hatEffectCount+1);
-		sd->hatEffectIDs[sd->hatEffectCount] = effectID;
-		sd->hatEffectCount++;
+		sd->hatEffects.push_back( effectID );
 	}else{
-		if( i == sd->hatEffectCount ){
+		if( it == sd->hatEffects.end() ){
 			return SCRIPT_CMD_SUCCESS;
 		}
 
-		for( ; i < sd->hatEffectCount - 1; i++ ){
-			sd->hatEffectIDs[i] = sd->hatEffectIDs[i+1];
-		}
-
-		sd->hatEffectCount--;
-
-		if( !sd->hatEffectCount ){
-			aFree(sd->hatEffectIDs);
-			sd->hatEffectIDs = NULL;
-		}
+		util::vector_erase_if_exists( sd->hatEffects, effectID );
 	}
 
 	if( !sd->state.connect_new ){

src/map/script.hpp

@@ -1842,7 +1842,7 @@ enum e_special_effects {
 	EF_MAX
 };
 
-enum e_hat_effects {
+enum e_hat_effects : int16{
 	HAT_EF_MIN = 0,
 	HAT_EF_BLOSSOM_FLUTTERING,
 	HAT_EF_MERMAID_LONGING,

src/map/unit.cpp

@@ -3401,12 +3401,8 @@ int unit_free(struct block_list *bl, clr_type clrtype)
 			}
 			sd->qi_count = 0;
 
-#if PACKETVER >= 20150513
-			if( sd->hatEffectCount > 0 ){
-				aFree(sd->hatEffectIDs);
-				sd->hatEffectIDs = NULL;
-				sd->hatEffectCount = 0;
-			}
+#if PACKETVER_MAIN_NUM >= 20150507 || PACKETVER_RE_NUM >= 20150429 || defined(PACKETVER_ZERO)
+			sd->hatEffects.clear();
 #endif
 
 			if (sd->achievement_data.achievements)