Cleanup of the HPluginData implementation (First part)

- Several explicit casts are removed, to have a slightly better
  type-checking at compile time.
- A destructor function is provided, to remove code duplication.

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

30 files changed, 246 insertions, 357 deletions

diff --git a/src/char/HPMchar.c b/src/char/HPMchar.c
index a67f017c1..14d7be1a3 100644
--- a/src/char/HPMchar.c
+++ b/src/char/HPMchar.c
@@ -47,13 +47,18 @@
 // HPMDataCheck comes after all the other includes
 #include "common/HPMDataCheck.h"
 
-bool HPM_char_grabHPData(struct HPDataOperationStorage *ret, enum HPluginDataTypes type, void *ptr) {
-	/* record address */
-	switch( type ) {
+/**
+ * HPM plugin data store validator sub-handler (char-server)
+ *
+ * @see HPM_interface::data_store_validate
+ */
+bool HPM_char_data_store_validate(enum HPluginDataTypes type, struct hplugin_data_store **store)
+{
+	switch (type) {
 		default:
-			return false;
+			break;
 	}
-	return true;
+	return false;
 }
 
 void HPM_char_plugin_load_sub(struct hplugin *plugin) {
@@ -61,6 +66,8 @@ void HPM_char_plugin_load_sub(struct hplugin *plugin) {
 }
 
 void HPM_char_do_init(void) {
+	HPM->load_sub = HPM_char_plugin_load_sub;
+	HPM->data_store_validate_sub = HPM_char_data_store_validate;
 	HPM->datacheck_init(HPMDataCheck, HPMDataCheckLen, HPMDataCheckVer);
 	HPM_shared_symbols(SERVER_TYPE_CHAR);
 }
diff --git a/src/char/HPMchar.h b/src/char/HPMchar.h
index e3e000ef3..fd07f45ed 100644
--- a/src/char/HPMchar.h
+++ b/src/char/HPMchar.h
@@ -13,7 +13,7 @@
 
 struct hplugin;
 
-bool HPM_char_grabHPData(struct HPDataOperationStorage *ret, enum HPluginDataTypes type, void *ptr);
+bool HPM_char_data_store_validate(enum HPluginDataTypes type, struct hplugin_data_store **store);
 
 void HPM_char_plugin_load_sub(struct hplugin *plugin);
 
diff --git a/src/common/HPM.c b/src/common/HPM.c
index 77c7e3fa2..ce3d769ca 100644
--- a/src/common/HPM.c
+++ b/src/common/HPM.c
@@ -168,57 +168,54 @@ bool hplugins_addpacket(unsigned short cmd, unsigned short length, void (*receiv
 	return true;
 }
 
-void hplugins_grabHPData(struct HPDataOperationStorage *ret, enum HPluginDataTypes type, void *ptr)
+bool hplugin_data_store_validate(enum HPluginDataTypes type, struct hplugin_data_store **store)
 {
-	/* record address */
+	nullpo_retr(false, store);
+
 	switch (type) {
 		/* core-handled */
 		case HPDT_SESSION:
-			ret->HPDataSRCPtr = (void**)(&((struct socket_data *)ptr)->hdata);
-			ret->hdatac = &((struct socket_data *)ptr)->hdatac;
-			break;
+			if (!*store) {
+				*store = HPM->data_store_create();
+			}
+			return true;
 		/* goes to sub */
 		default:
-			if (HPM->grabHPDataSub) {
-				if (HPM->grabHPDataSub(ret,type,ptr))
-					return;
-				ShowError("HPM:HPM:grabHPData failed, unknown type %d!\n",type);
-			} else {
-				ShowError("HPM:grabHPData failed, type %d needs sub-handler!\n",type);
-			}
-			ret->HPDataSRCPtr = NULL;
-			ret->hdatac = NULL;
-			return;
+			break;
 	}
+	if (HPM->data_store_validate_sub) {
+		if (HPM->data_store_validate_sub(type, store))
+			return true;
+		ShowError("HPM:HPM:validateHPData failed, unknown type %d!\n",type);
+	} else {
+		ShowError("HPM:validateHPData failed, type %d needs sub-handler!\n",type);
+	}
+	return false;
 }
 
-void hplugins_addToHPData(enum HPluginDataTypes type, unsigned int pluginID, void *ptr, void *data, unsigned int index, bool autofree)
+void hplugins_addToHPData(enum HPluginDataTypes type, unsigned int pluginID, struct hplugin_data_store **storeptr, void *data, unsigned int index, bool autofree)
 {
-	struct HPluginData *HPData, **HPDataSRC;
-	struct HPDataOperationStorage action;
-	unsigned int i, max;
-
-	HPM->grabHPData(&action,type,ptr);
+	struct hplugin_data_entry *HPData;
+	unsigned int i;
+	struct hplugin_data_store *store;
 
-	if (action.hdatac == NULL) { /* woo it failed! */
+	if (!HPM->data_store_validate(type, storeptr)) {
+		/* woo it failed! */
 		ShowError("HPM:addToHPData:%s: failed, type %d (%u|%u)\n",HPM->pid2name(pluginID),type,pluginID,index);
 		return;
 	}
-
-	/* flag */
-	HPDataSRC = *(action.HPDataSRCPtr);
-	max = *(action.hdatac);
+	store = *storeptr;
 
 	/* duplicate check */
-	for (i = 0; i < max; i++) {
-		if (HPDataSRC[i]->pluginID == pluginID && HPDataSRC[i]->type == index) {
+	for (i = 0; i < store->count; i++) {
+		if (store->array[i]->pluginID == pluginID && store->array[i]->type == index) {
 			ShowError("HPM:addToHPData:%s: error! attempting to insert duplicate struct of id %u and index %u\n",HPM->pid2name(pluginID),pluginID,index);
 			return;
 		}
 	}
 
-	/* HPluginData is always same size, probably better to use the ERS (with reasonable chunk size e.g. 10/25/50) */
-	CREATE(HPData, struct HPluginData, 1);
+	/* hplugin_data_entry is always same size, probably better to use the ERS (with reasonable chunk size e.g. 10/25/50) */
+	CREATE(HPData, struct hplugin_data_entry, 1);
 
 	/* input */
 	HPData->pluginID = pluginID;
@@ -227,76 +224,63 @@ void hplugins_addToHPData(enum HPluginDataTypes type, unsigned int pluginID, voi
 	HPData->data = data;
 
 	/* resize */
-	*(action.hdatac) += 1;
-	RECREATE(*(action.HPDataSRCPtr),struct HPluginData *,*(action.hdatac));
+	RECREATE(store->array, struct hplugin_data_entry *, ++store->count);
 
-	/* RECREATE modified the address */
-	HPDataSRC = *(action.HPDataSRCPtr);
-	HPDataSRC[*(action.hdatac) - 1] = HPData;
+	store->array[store->count - 1] = HPData;
 }
 
-void *hplugins_getFromHPData(enum HPluginDataTypes type, unsigned int pluginID, void *ptr, unsigned int index)
+void *hplugins_getFromHPData(enum HPluginDataTypes type, unsigned int pluginID, struct hplugin_data_store **storeptr, unsigned int index)
 {
-	struct HPDataOperationStorage action;
-	struct HPluginData **HPDataSRC;
-	unsigned int i, max;
-
-	HPM->grabHPData(&action,type,ptr);
+	unsigned int i;
+	struct hplugin_data_store *store;
 
-	if (action.hdatac == NULL) { /* woo it failed! */
+	if (!HPM->data_store_validate(type, storeptr)) {
+		/* woo it failed! */
 		ShowError("HPM:getFromHPData:%s: failed, type %d (%u|%u)\n",HPM->pid2name(pluginID),type,pluginID,index);
 		return NULL;
 	}
+	store = *storeptr;
 
-	/* flag */
-	HPDataSRC = *(action.HPDataSRCPtr);
-	max = *(action.hdatac);
-
-	for (i = 0; i < max; i++) {
-		if (HPDataSRC[i]->pluginID == pluginID && HPDataSRC[i]->type == index)
-			return HPDataSRC[i]->data;
+	for (i = 0; i < store->count; i++) {
+		if (store->array[i]->pluginID == pluginID && store->array[i]->type == index)
+			return store->array[i]->data;
 	}
 
 	return NULL;
 }
 
-void hplugins_removeFromHPData(enum HPluginDataTypes type, unsigned int pluginID, void *ptr, unsigned int index)
+void hplugins_removeFromHPData(enum HPluginDataTypes type, unsigned int pluginID, struct hplugin_data_store **storeptr, unsigned int index)
 {
-	struct HPDataOperationStorage action;
-	struct HPluginData **HPDataSRC;
-	unsigned int i, max;
-
-	HPM->grabHPData(&action,type,ptr);
+	unsigned int i;
+	struct hplugin_data_store *store;
 
-	if (action.hdatac == NULL) { /* woo it failed! */
+	if (!HPM->data_store_validate(type, storeptr)) {
+		/* woo it failed! */
 		ShowError("HPM:removeFromHPData:%s: failed, type %d (%u|%u)\n",HPM->pid2name(pluginID),type,pluginID,index);
 		return;
 	}
+	store = *storeptr;
 
-	/* flag */
-	HPDataSRC = *(action.HPDataSRCPtr);
-	max = *(action.hdatac);
-
-	for (i = 0; i < max; i++) {
-		if (HPDataSRC[i]->pluginID == pluginID && HPDataSRC[i]->type == index)
+	for (i = 0; i < store->count; i++) {
+		if (store->array[i]->pluginID == pluginID && store->array[i]->type == index)
 			break;
 	}
 
-	if (i != max) {
+	if (i != store->count) {
 		unsigned int cursor;
 
-		aFree(HPDataSRC[i]->data);/* when its removed we delete it regardless of autofree */
-		aFree(HPDataSRC[i]);
-		HPDataSRC[i] = NULL;
+		aFree(store->array[i]->data);/* when its removed we delete it regardless of autofree */
+		aFree(store->array[i]);
+		store->array[i] = NULL;
 
-		for (i = 0, cursor = 0; i < max; i++) {
-			if (HPDataSRC[i] == NULL)
+		for (i = 0, cursor = 0; i < store->count; i++) {
+			if (store->array[i] == NULL)
 				continue;
 			if (i != cursor)
-				HPDataSRC[cursor] = HPDataSRC[i];
+				store->array[cursor] = store->array[i];
 			cursor++;
 		}
-		*(action.hdatac) = cursor;
+		store->count = cursor;
 	}
 }
 
@@ -781,6 +765,43 @@ bool hplugins_parse_conf(const char *w1, const char *w2, enum HPluginConfType po
 }
 
 /**
+ * Helper to destroy and release an interface's hplugin_data store.
+ *
+ * @param hdata The hplugin_data store. The pointer will be freed.
+ */
+void hplugin_data_store_destroy(struct hplugin_data_store *store)
+{
+	unsigned int i;
+
+	if (!store)
+		return;
+
+	for (i = 0; i < store->count; i++) {
+		if (store->array[i]->flag.free) {
+			aFree(store->array[i]->data);
+		}
+		aFree(store->array[i]);
+	}
+	aFree(store->array);
+	aFree(store);
+}
+
+/**
+ * Helper to create and initialize an interface's hplugin_data store.
+ *
+ * The store is owned by the caller, and it should be eventually destroyed by
+ * \c hdata_destroy.
+ *
+ * @return An initialized hplugin_data store.
+ */
+struct hplugin_data_store *hplugin_data_store_create(void)
+{
+	struct hplugin_data_store *store;
+	CREATE(store, struct hplugin_data_store, 1);
+	return store;
+}
+
+/**
  * Called by HPM->DataCheck on a plugins incoming data, ensures data structs in use are matching!
  **/
 bool HPM_DataCheck(struct s_HPMDataCheck *src, unsigned int size, int version, char *name) {
@@ -947,10 +968,13 @@ void hpm_defaults(void)
 	HPM->parse_packets = hplugins_parse_packets;
 	HPM->load_sub = NULL;
 	HPM->addhook_sub = NULL;
-	HPM->grabHPData = hplugins_grabHPData;
-	HPM->grabHPDataSub = NULL;
 	HPM->parseConf = hplugins_parse_conf;
 	HPM->DataCheck = HPM_DataCheck;
 	HPM->datacheck_init = HPM_datacheck_init;
 	HPM->datacheck_final = HPM_datacheck_final;
+
+	HPM->data_store_destroy = hplugin_data_store_destroy;
+	HPM->data_store_create = hplugin_data_store_create;
+	HPM->data_store_validate = hplugin_data_store_validate;
+	HPM->data_store_validate_sub = NULL;
 }
diff --git a/src/common/HPM.h b/src/common/HPM.h
index 444829419..1d13a178f 100644
--- a/src/common/HPM.h
+++ b/src/common/HPM.h
@@ -65,7 +65,7 @@ struct hpm_symbol {
 	void *ptr;        ///< The symbol value
 };
 
-struct HPluginData {
+struct hplugin_data_entry {
 	unsigned int pluginID;
 	unsigned int type;
 	struct {
@@ -74,6 +74,11 @@ struct HPluginData {
 	void *data;
 };
 
+struct hplugin_data_store {
+	struct hplugin_data_entry **array;
+	unsigned int count;
+};
+
 struct HPluginPacket {
 	unsigned int pluginID;
 	unsigned short cmd;
@@ -86,10 +91,6 @@ struct HPMFileNameCache {
 	char *name;
 };
 
-struct HPDataOperationStorage {
-	void **HPDataSRCPtr;
-	unsigned int *hdatac;
-};
 /*  */
 struct HPConfListenStorage {
 	unsigned int pluginID;
@@ -136,15 +137,18 @@ struct HPM_interface {
 	unsigned char (*parse_packets) (int fd, enum HPluginPacketHookingPoints point);
 	void (*load_sub) (struct hplugin *plugin);
 	bool (*addhook_sub) (enum HPluginHookType type, const char *target, void *hook, unsigned int pID);
-	void (*grabHPData) (struct HPDataOperationStorage *ret, enum HPluginDataTypes type, void *ptr);
-	/* for server-specific HPData e.g. map_session_data */
-	bool (*grabHPDataSub) (struct HPDataOperationStorage *ret, enum HPluginDataTypes type, void *ptr);
 	/* for custom config parsing */
 	bool (*parseConf) (const char *w1, const char *w2, enum HPluginConfType point);
 	/* validates plugin data */
 	bool (*DataCheck) (struct s_HPMDataCheck *src, unsigned int size, int version, char *name);
 	void (*datacheck_init) (const struct s_HPMDataCheck *src, unsigned int length, int version);
 	void (*datacheck_final) (void);
+
+	struct hplugin_data_store *(*data_store_create) (void);
+	void (*data_store_destroy) (struct hplugin_data_store *store);
+	bool (*data_store_validate) (enum HPluginDataTypes type, struct hplugin_data_store **store);
+	/* for server-specific HPData e.g. map_session_data */
+	bool (*data_store_validate_sub) (enum HPluginDataTypes type, struct hplugin_data_store **store);
 };
 
 CMDLINEARG(loadplugin);
diff --git a/src/common/HPMi.h b/src/common/HPMi.h
index eee713fd9..d92503a91 100644
--- a/src/common/HPMi.h
+++ b/src/common/HPMi.h
@@ -14,6 +14,7 @@ struct script_state;
 struct AtCommandInfo;
 struct socket_data;
 struct map_session_data;
+struct hplugin_data_store;
 
 #define HPM_VERSION "1.1"
 #define HPM_ADDCONF_LENGTH 40
@@ -96,53 +97,53 @@ enum HPluginConfType {
 #define addArg(name, param,func,help) (HPMi->addArg(HPMi->pid,(name),(param),(cmdline_arg_ ## func),(help)))
 /* HPData handy redirects */
 /* session[] */
-#define addToSession(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_SESSION,HPMi->pid,(ptr),(data),(index),(autofree)))
-#define getFromSession(ptr,index) (HPMi->getFromHPData(HPDT_SESSION,HPMi->pid,(ptr),(index)))
-#define removeFromSession(ptr,index) (HPMi->removeFromHPData(HPDT_SESSION,HPMi->pid,(ptr),(index)))
+#define addToSession(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_SESSION,HPMi->pid,&(ptr)->hdata,(data),(index),(autofree)))
+#define getFromSession(ptr,index) (HPMi->getFromHPData(HPDT_SESSION,HPMi->pid,&(ptr)->hdata,(index)))
+#define removeFromSession(ptr,index) (HPMi->removeFromHPData(HPDT_SESSION,HPMi->pid,&(ptr)->hdata,(index)))
 /* map_session_data */
-#define addToMSD(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_MSD,HPMi->pid,(ptr),(data),(index),(autofree)))
-#define getFromMSD(ptr,index) (HPMi->getFromHPData(HPDT_MSD,HPMi->pid,(ptr),(index)))
-#define removeFromMSD(ptr,index) (HPMi->removeFromHPData(HPDT_MSD,HPMi->pid,(ptr),(index)))
+#define addToMSD(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_MSD,HPMi->pid,&(ptr)->hdata,(data),(index),(autofree)))
+#define getFromMSD(ptr,index) (HPMi->getFromHPData(HPDT_MSD,HPMi->pid,&(ptr)->hdata,(index)))
+#define removeFromMSD(ptr,index) (HPMi->removeFromHPData(HPDT_MSD,HPMi->pid,&(ptr)->hdata,(index)))
 /* npc_data */
-#define addToNPCD(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_NPCD,HPMi->pid,(ptr),(data),(index),(autofree)))
-#define getFromNPCD(ptr,index) (HPMi->getFromHPData(HPDT_NPCD,HPMi->pid,(ptr),(index)))
-#define removeFromNPCD(ptr,index) (HPMi->removeFromHPData(HPDT_NPCD,HPMi->pid,(ptr),(index)))
+#define addToNPCD(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_NPCD,HPMi->pid,&(ptr)->hdata,(data),(index),(autofree)))
+#define getFromNPCD(ptr,index) (HPMi->getFromHPData(HPDT_NPCD,HPMi->pid,&(ptr)->hdata,(index)))
+#define removeFromNPCD(ptr,index) (HPMi->removeFromHPData(HPDT_NPCD,HPMi->pid,&(ptr)->hdata,(index)))
 /* map_data */
-#define addToMAPD(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_MAP,HPMi->pid,(ptr),(data),(index),(autofree)))
-#define getFromMAPD(ptr,index) (HPMi->getFromHPData(HPDT_MAP,HPMi->pid,(ptr),(index)))
-#define removeFromMAPD(ptr,index) (HPMi->removeFromHPData(HPDT_MAP,HPMi->pid,(ptr),(index)))
+#define addToMAPD(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_MAP,HPMi->pid,&(ptr)->hdata,(data),(index),(autofree)))
+#define getFromMAPD(ptr,index) (HPMi->getFromHPData(HPDT_MAP,HPMi->pid,&(ptr)->hdata,(index)))
+#define removeFromMAPD(ptr,index) (HPMi->removeFromHPData(HPDT_MAP,HPMi->pid,&(ptr)->hdata,(index)))
 /* party_data */
-#define addToPAD(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_PARTY,HPMi->pid,(ptr),(data),(index),(autofree)))
-#define getFromPAD(ptr,index) (HPMi->getFromHPData(HPDT_PARTY,HPMi->pid,(ptr),(index)))
-#define removeFromPAD(ptr,index) (HPMi->removeFromHPData(HPDT_PARTY,HPMi->pid,(ptr),(index)))
+#define addToPAD(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_PARTY,HPMi->pid,&(ptr)->hdata,(data),(index),(autofree)))
+#define getFromPAD(ptr,index) (HPMi->getFromHPData(HPDT_PARTY,HPMi->pid,&(ptr)->hdata,(index)))
+#define removeFromPAD(ptr,index) (HPMi->removeFromHPData(HPDT_PARTY,HPMi->pid,&(ptr)->hdata,(index)))
 /* guild */
-#define addToGLD(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_GUILD,HPMi->pid,(ptr),(data),(index),(autofree)))
-#define getFromGLD(ptr,index) (HPMi->getFromHPData(HPDT_GUILD,HPMi->pid,(ptr),(index)))
-#define removeFromGLD(ptr,index) (HPMi->removeFromHPData(HPDT_GUILD,HPMi->pid,(ptr),(index)))
+#define addToGLD(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_GUILD,HPMi->pid,&(ptr)->hdata,(data),(index),(autofree)))
+#define getFromGLD(ptr,index) (HPMi->getFromHPData(HPDT_GUILD,HPMi->pid,&(ptr)->hdata,(index)))
+#define removeFromGLD(ptr,index) (HPMi->removeFromHPData(HPDT_GUILD,HPMi->pid,&(ptr)->hdata,(index)))
 /* instance_data */
-#define addToINSTD(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_INSTANCE,HPMi->pid,(ptr),(data),(index),(autofree)))
-#define getFromINSTD(ptr,index) (HPMi->getFromHPData(HPDT_INSTANCE,HPMi->pid,(ptr),(index)))
-#define removeFromINSTD(ptr,index) (HPMi->removeFromHPData(HPDT_INSTANCE,HPMi->pid,(ptr),(index)))
+#define addToINSTD(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_INSTANCE,HPMi->pid,&(ptr)->hdata,(data),(index),(autofree)))
+#define getFromINSTD(ptr,index) (HPMi->getFromHPData(HPDT_INSTANCE,HPMi->pid,&(ptr)->hdata,(index)))
+#define removeFromINSTD(ptr,index) (HPMi->removeFromHPData(HPDT_INSTANCE,HPMi->pid,&(ptr)->hdata,(index)))
 /* mob_db */
-#define addToMOBDB(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_MOBDB,HPMi->pid,(ptr),(data),(index),(autofree)))
-#define getFromMOBDB(ptr,index) (HPMi->getFromHPData(HPDT_MOBDB,HPMi->pid,(ptr),(index)))
-#define removeFromMOBDB(ptr,index) (HPMi->removeFromHPData(HPDT_MOBDB,HPMi->pid,(ptr),(index)))
+#define addToMOBDB(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_MOBDB,HPMi->pid,&(ptr)->hdata,(data),(index),(autofree)))
+#define getFromMOBDB(ptr,index) (HPMi->getFromHPData(HPDT_MOBDB,HPMi->pid,&(ptr)->hdata,(index)))
+#define removeFromMOBDB(ptr,index) (HPMi->removeFromHPData(HPDT_MOBDB,HPMi->pid,&(ptr)->hdata,(index)))
 /* mob_data */
-#define addToMOBDATA(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_MOBDATA,HPMi->pid,(ptr),(data),(index),(autofree)))
-#define getFromMOBDATA(ptr,index) (HPMi->getFromHPData(HPDT_MOBDATA,HPMi->pid,(ptr),(index)))
-#define removeFromMOBDATA(ptr,index) (HPMi->removeFromHPData(HPDT_MOBDATA,HPMi->pid,(ptr),(index)))
+#define addToMOBDATA(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_MOBDATA,HPMi->pid,&(ptr)->hdata,(data),(index),(autofree)))
+#define getFromMOBDATA(ptr,index) (HPMi->getFromHPData(HPDT_MOBDATA,HPMi->pid,&(ptr)->hdata,(index)))
+#define removeFromMOBDATA(ptr,index) (HPMi->removeFromHPData(HPDT_MOBDATA,HPMi->pid,&(ptr)->hdata,(index)))
 /* item_data */
-#define addToITEMDATA(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_ITEMDATA,HPMi->pid,(ptr),(data),(index),(autofree)))
-#define getFromITEMDATA(ptr,index) (HPMi->getFromHPData(HPDT_ITEMDATA,HPMi->pid,(ptr),(index)))
-#define removeFromITEMDATA(ptr,index) (HPMi->removeFromHPData(HPDT_ITEMDATA,HPMi->pid,(ptr),(index)))
+#define addToITEMDATA(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_ITEMDATA,HPMi->pid,&(ptr)->hdata,(data),(index),(autofree)))
+#define getFromITEMDATA(ptr,index) (HPMi->getFromHPData(HPDT_ITEMDATA,HPMi->pid,&(ptr)->hdata,(index)))
+#define removeFromITEMDATA(ptr,index) (HPMi->removeFromHPData(HPDT_ITEMDATA,HPMi->pid,&(ptr)->hdata,(index)))
 /* battleground_data */
-#define addToBGDATA(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_BGDATA,HPMi->pid,(ptr),(data),(index),(autofree)))
-#define getFromBGDATA(ptr,index) (HPMi->getFromHPData(HPDT_BGDATA,HPMi->pid,(ptr),(index)))
-#define removeFromBGDATA(ptr,index) (HPMi->removeFromHPData(HPDT_BGDATA,HPMi->pid,(ptr),(index)))
+#define addToBGDATA(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_BGDATA,HPMi->pid,&(ptr)->hdata,(data),(index),(autofree)))
+#define getFromBGDATA(ptr,index) (HPMi->getFromHPData(HPDT_BGDATA,HPMi->pid,&(ptr)->hdata,(index)))
+#define removeFromBGDATA(ptr,index) (HPMi->removeFromHPData(HPDT_BGDATA,HPMi->pid,&(ptr)->hdata,(index)))
 /* autotrade_vending */
-#define addToATVEND(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_AUTOTRADE_VEND,HPMi->pid,(ptr),(data),(index),(autofree)))
-#define getFromATVEND(ptr,index) (HPMi->getFromHPData(HPDT_AUTOTRADE_VEND,HPMi->pid,(ptr),(index)))
-#define removeFromATVEND(ptr,index) (HPMi->removeFromHPData(HPDT_AUTOTRADE_VEND,HPMi->pid,(ptr),(index)))
+#define addToATVEND(ptr,data,index,autofree) (HPMi->addToHPData(HPDT_AUTOTRADE_VEND,HPMi->pid,&(ptr)->hdata,(data),(index),(autofree)))
+#define getFromATVEND(ptr,index) (HPMi->getFromHPData(HPDT_AUTOTRADE_VEND,HPMi->pid,&(ptr)->hdata,(index)))
+#define removeFromATVEND(ptr,index) (HPMi->removeFromHPData(HPDT_AUTOTRADE_VEND,HPMi->pid,&(ptr)->hdata,(index)))
 
 /// HPMi->addCommand
 #define addAtcommand(cname,funcname) do { \
@@ -205,9 +206,9 @@ struct HPMi_interface {
 	bool (*addScript) (char *name, char *args, bool (*func)(struct script_state *st), bool isDeprecated);
 	void (*addCPCommand) (char *name, CParseFunc func);
 	/* HPM Custom Data */
-	void (*addToHPData) (enum HPluginDataTypes type, unsigned int pluginID, void *ptr, void *data, unsigned int index, bool autofree);
-	void *(*getFromHPData) (enum HPluginDataTypes type, unsigned int pluginID, void *ptr, unsigned int index);
-	void (*removeFromHPData) (enum HPluginDataTypes type, unsigned int pluginID, void *ptr, unsigned int index);
+	void (*addToHPData) (enum HPluginDataTypes type, unsigned int pluginID, struct hplugin_data_store **storeptr, void *data, unsigned int index, bool autofree);
+	void *(*getFromHPData) (enum HPluginDataTypes type, unsigned int pluginID, struct hplugin_data_store **storeptr, unsigned int index);
+	void (*removeFromHPData) (enum HPluginDataTypes type, unsigned int pluginID, struct hplugin_data_store **storeptr, unsigned int index);
 	/* packet */
 	bool (*addPacket) (unsigned short cmd, unsigned short length, void (*receive)(int fd), unsigned int point, unsigned int pluginID);
 	/* Hooking */
diff --git a/src/common/mmo.h b/src/common/mmo.h
index 012eec935..cbda0e91b 100644
--- a/src/common/mmo.h
+++ b/src/common/mmo.h
@@ -198,7 +198,7 @@
 #define JOBL_BABY 0x2000  //8192
 #define JOBL_THIRD 0x4000 //16384
 
-struct HPluginData;
+struct hplugin_data_store;
 
 enum item_types {
 	IT_HEALING = 0,
@@ -663,8 +663,7 @@ struct guild {
 	struct channel_data *channel;
 
 	/* HPM Custom Struct */
-	struct HPluginData **hdata;
-	unsigned int hdatac;
+	struct hplugin_data_store *hdata;
 };
 
 struct guild_castle {
diff --git a/src/common/socket.c b/src/common/socket.c
index de8ca4682..842f9ba87 100644
--- a/src/common/socket.c
+++ b/src/common/socket.c
@@ -623,7 +623,6 @@ static int create_session(int fd, RecvFunc func_recv, SendFunc func_send, ParseF
 	sockt->session[fd]->rdata_tick = sockt->last_tick;
 	sockt->session[fd]->session_data = NULL;
 	sockt->session[fd]->hdata = NULL;
-	sockt->session[fd]->hdatac = 0;
 	return 0;
 }
 
@@ -638,16 +637,8 @@ static void delete_session(int fd)
 		aFree(sockt->session[fd]->wdata);
 		if( sockt->session[fd]->session_data )
 			aFree(sockt->session[fd]->session_data);
-		if (sockt->session[fd]->hdata) {
-			unsigned int i;
-			for(i = 0; i < sockt->session[fd]->hdatac; i++) {
-				if( sockt->session[fd]->hdata[i]->flag.free ) {
-					aFree(sockt->session[fd]->hdata[i]->data);
-				}
-				aFree(sockt->session[fd]->hdata[i]);
-			}
-			aFree(sockt->session[fd]->hdata);
-		}
+		HPM->data_store_destroy(sockt->session[fd]->hdata);
+		sockt->session[fd]->hdata = NULL;
 		aFree(sockt->session[fd]);
 		sockt->session[fd] = NULL;
 	}
diff --git a/src/common/socket.h b/src/common/socket.h
index a995bffc8..510eac575 100644
--- a/src/common/socket.h
+++ b/src/common/socket.h
@@ -17,7 +17,7 @@
 #	include <sys/types.h>
 #endif
 
-struct HPluginData;
+struct hplugin_data_store;
 
 #define FIFOSIZE_SERVERLINK 256*1024
 
@@ -105,8 +105,7 @@ struct socket_data {
 
 	void* session_data; // stores application-specific data related to the session
 
-	struct HPluginData **hdata;
-	unsigned int hdatac;
+	struct hplugin_data_store *hdata;
 };
 
 struct hSockOpt {
diff --git a/src/login/HPMlogin.c b/src/login/HPMlogin.c
index 895cbad16..ce88728fe 100644
--- a/src/login/HPMlogin.c
+++ b/src/login/HPMlogin.c
@@ -32,13 +32,18 @@
 // HPMDataCheck comes after all the other includes
 #include "common/HPMDataCheck.h"
 
-bool HPM_login_grabHPData(struct HPDataOperationStorage *ret, enum HPluginDataTypes type, void *ptr) {
-	/* record address */
-	switch( type ) {
+/**
+ * HPM plugin data store validator sub-handler (login-server)
+ *
+ * @see HPM_interface::data_store_validate
+ */
+bool HPM_login_data_store_validate(enum HPluginDataTypes type, struct hplugin_data_store **store)
+{
+	switch (type) {
 		default:
-			return false;
+			break;
 	}
-	return true;
+	return false;
 }
 
 void HPM_login_plugin_load_sub(struct hplugin *plugin) {
@@ -46,6 +51,8 @@ void HPM_login_plugin_load_sub(struct hplugin *plugin) {
 }
 
 void HPM_login_do_init(void) {
+	HPM->load_sub = HPM_login_plugin_load_sub;
+	HPM->data_store_validate_sub = HPM_login_data_store_validate;
 	HPM->datacheck_init(HPMDataCheck, HPMDataCheckLen, HPMDataCheckVer);
 	HPM_shared_symbols(SERVER_TYPE_LOGIN);
 }
diff --git a/src/login/HPMlogin.h b/src/login/HPMlogin.h
index 2a4d5c538..1f08a8666 100644
--- a/src/login/HPMlogin.h
+++ b/src/login/HPMlogin.h
@@ -13,7 +13,7 @@
 
 struct hplugin;
 
-bool HPM_login_grabHPData(struct HPDataOperationStorage *ret, enum HPluginDataTypes type, void *ptr);
+bool HPM_login_data_store_validate(enum HPluginDataTypes type, struct hplugin_data_store **store);
 
 void HPM_login_plugin_load_sub(struct hplugin *plugin);
 
diff --git a/src/map/HPMmap.c b/src/map/HPMmap.c
index ac78e8c84..ddffb5519 100644
--- a/src/map/HPMmap.c
+++ b/src/map/HPMmap.c
@@ -85,57 +85,33 @@ struct HPM_atcommand_list {
 struct HPM_atcommand_list *atcommand_list = NULL;
 unsigned int atcommand_list_items = 0;
 
-bool HPM_map_grabHPData(struct HPDataOperationStorage *ret, enum HPluginDataTypes type, void *ptr) {
-	/* record address */
-	switch( type ) {
+/**
+ * HPM plugin data store validator sub-handler (map-server)
+ *
+ * @see HPM_interface::data_store_validate
+ */
+bool HPM_map_data_store_validate(enum HPluginDataTypes type, struct hplugin_data_store **store)
+{
+	switch (type) {
 		case HPDT_MSD:
-			ret->HPDataSRCPtr = (void**)(&((struct map_session_data *)ptr)->hdata);
-			ret->hdatac = &((struct map_session_data *)ptr)->hdatac;
-			break;
 		case HPDT_NPCD:
-			ret->HPDataSRCPtr = (void**)(&((struct npc_data *)ptr)->hdata);
-			ret->hdatac = &((struct npc_data *)ptr)->hdatac;
-			break;
 		case HPDT_MAP:
-			ret->HPDataSRCPtr = (void**)(&((struct map_data *)ptr)->hdata);
-			ret->hdatac = &((struct map_data *)ptr)->hdatac;
-			break;
 		case HPDT_PARTY:
-			ret->HPDataSRCPtr = (void**)(&((struct party_data *)ptr)->hdata);
-			ret->hdatac = &((struct party_data *)ptr)->hdatac;
-			break;
 		case HPDT_GUILD:
-			ret->HPDataSRCPtr = (void**)(&((struct guild *)ptr)->hdata);
-			ret->hdatac = &((struct guild *)ptr)->hdatac;
-			break;
 		case HPDT_INSTANCE:
-			ret->HPDataSRCPtr = (void**)(&((struct instance_data *)ptr)->hdata);
-			ret->hdatac = &((struct instance_data *)ptr)->hdatac;
-			break;
 		case HPDT_MOBDB:
-			ret->HPDataSRCPtr = (void**)(&((struct mob_db *)ptr)->hdata);
-			ret->hdatac = &((struct mob_db *)ptr)->hdatac;
-			break;
 		case HPDT_MOBDATA:
-			ret->HPDataSRCPtr = (void**)(&((struct mob_data *)ptr)->hdata);
-			ret->hdatac = &((struct mob_data *)ptr)->hdatac;
-			break;
 		case HPDT_ITEMDATA:
-			ret->HPDataSRCPtr = (void**)(&((struct item_data *)ptr)->hdata);
-			ret->hdatac = &((struct item_data *)ptr)->hdatac;
-			break;
 		case HPDT_BGDATA:
-			ret->HPDataSRCPtr = (void**)(&((struct battleground_data *)ptr)->hdata);
-			ret->hdatac = &((struct battleground_data *)ptr)->hdatac;
-			break;
 		case HPDT_AUTOTRADE_VEND:
-			ret->HPDataSRCPtr = (void**)(&((struct autotrade_vending *)ptr)->hdata);
-			ret->hdatac = &((struct autotrade_vending *)ptr)->hdatac;
-			break;
+			if (!*store) {
+				*store = HPM->data_store_create();
+			}
+			return true;
 		default:
-			return false;
+			break;
 	}
-	return true;
+	return false;
 }
 
 void HPM_map_plugin_load_sub(struct hplugin *plugin) {
@@ -188,7 +164,7 @@ void HPM_map_add_group_permission(unsigned int pluginID, char *name, unsigned in
 
 void HPM_map_do_init(void) {
 	HPM->load_sub = HPM_map_plugin_load_sub;
-	HPM->grabHPDataSub = HPM_map_grabHPData;
+	HPM->data_store_validate_sub = HPM_map_data_store_validate;
 	HPM->datacheck_init(HPMDataCheck, HPMDataCheckLen, HPMDataCheckVer);
 	HPM_shared_symbols(SERVER_TYPE_MAP);
 }
diff --git a/src/map/HPMmap.h b/src/map/HPMmap.h
index 00a8f43c3..10bdf0ba7 100644
--- a/src/map/HPMmap.h
+++ b/src/map/HPMmap.h
@@ -15,7 +15,7 @@
 struct hplugin;
 struct map_session_data;
 
-bool HPM_map_grabHPData(struct HPDataOperationStorage *ret, enum HPluginDataTypes type, void *ptr);
+bool HPM_map_data_store_validate(enum HPluginDataTypes type, struct hplugin_data_store **store);
 
 bool HPM_map_add_atcommand(char *name, AtCommandFunc func);
 void HPM_map_atcommands(void);
diff --git a/src/map/battleground.c b/src/map/battleground.c
index 5df05d301..46d695272 100644
--- a/src/map/battleground.c
+++ b/src/map/battleground.c
@@ -880,17 +880,10 @@ void do_init_battleground(bool minimal) {
  */
 int bg_team_db_final(DBKey key, DBData *data, va_list ap) {
 	struct battleground_data* bgd = DB->data2ptr(data);
-	int i;
-	nullpo_ret(bgd);
-	for(i = 0; i < bgd->hdatac; i++ ) {
-		if( bgd->hdata[i]->flag.free ) {
-			aFree(bgd->hdata[i]->data);
-		}
-		aFree(bgd->hdata[i]);
-	}
-	if( bgd->hdata )
-		aFree(bgd->hdata);
-		
+
+	HPM->data_store_destroy(bgd->hdata);
+	bgd->hdata = NULL;
+
 	return 0;
 }
 
diff --git a/src/map/battleground.h b/src/map/battleground.h
index 094037f43..0280407a2 100644
--- a/src/map/battleground.h
+++ b/src/map/battleground.h
@@ -10,7 +10,7 @@
 #include "common/db.h"
 #include "common/mmo.h" // struct party
 
-struct HPluginData;
+struct hplugin_data_store;
 struct block_list;
 struct map_session_data;
 
@@ -54,8 +54,7 @@ struct battleground_data {
 	char logout_event[EVENT_NAME_LENGTH];
 	char die_event[EVENT_NAME_LENGTH];
 	/* HPM Custom Struct */
-	struct HPluginData **hdata;
-	unsigned int hdatac;
+	struct hplugin_data_store *hdata;
 };
 
 struct bg_arena {
diff --git a/src/map/guild.c b/src/map/guild.c
index 7a187b625..2dca97502 100644
--- a/src/map/guild.c
+++ b/src/map/guild.c
@@ -1763,16 +1763,8 @@ int guild_broken(int guild_id,int flag)
 	if( g->instance )
 		aFree(g->instance);
 
-	if( g->hdata )
-	{
-		for( i = 0; i < g->hdatac; i++ ) {
-			if( g->hdata[i]->flag.free ) {
-				aFree(g->hdata[i]->data);
-			}
-			aFree(g->hdata[i]);
-		}
-		aFree(g->hdata);
-	}
+	HPM->data_store_destroy(g->hdata);
+	g->hdata = NULL;
 
 	idb_remove(guild->db,guild_id);
 	return 0;
@@ -2250,7 +2242,6 @@ void do_init_guild(bool minimal) {
 void do_final_guild(void) {
 	DBIterator *iter = db_iterator(guild->db);
 	struct guild *g;
-	int i;
 
 	for( g = dbi_first(iter); dbi_exists(iter); g = dbi_next(iter) ) {
 		if( g->channel != NULL )
@@ -2259,16 +2250,8 @@ void do_final_guild(void) {
 			aFree(g->instance);
 			g->instance = NULL;
 		}
-		if( g->hdata )
-		{
-			for( i = 0; i < g->hdatac; i++ ) {
-				if( g->hdata[i]->flag.free ) {
-					aFree(g->hdata[i]->data);
-				}
-				aFree(g->hdata[i]);
-			}
-			aFree(g->hdata);
-		}
+		HPM->data_store_destroy(g->hdata);
+		g->hdata = NULL;
 	}
 
 	dbi_destroy(iter);
diff --git a/src/map/instance.c b/src/map/instance.c
index 300247fe7..7213c43a1 100644
--- a/src/map/instance.c
+++ b/src/map/instance.c
@@ -588,19 +588,8 @@ void instance_destroy(int instance_id) {
 	instance->list[instance_id].state = INSTANCE_FREE;
 	instance->list[instance_id].num_map = 0;
 
-	if (instance->list[instance_id].hdata)
-	{
-		for( j = 0; j < instance->list[instance_id].hdatac; j++ ) {
-			if( instance->list[instance_id].hdata[j]->flag.free ) {
-				aFree(instance->list[instance_id].hdata[j]->data);
-			}
-			aFree(instance->list[instance_id].hdata[j]);
-		}
-		aFree(instance->list[instance_id].hdata);
-	}
-
+	HPM->data_store_destroy(instance->list[instance_id].hdata);
 	instance->list[instance_id].hdata = NULL;
-	instance->list[instance_id].hdatac = 0;
 }
 
 /*--------------------------------------
diff --git a/src/map/instance.h b/src/map/instance.h
index 589e1a511..f879195ef 100644
--- a/src/map/instance.h
+++ b/src/map/instance.h
@@ -9,7 +9,7 @@
 #include "common/hercules.h"
 #include "common/mmo.h" // struct point
 
-struct HPluginData;
+struct hplugin_data_store;
 struct block_list;
 struct map_session_data;
 
@@ -54,8 +54,7 @@ struct instance_data {
 	struct point respawn; ///< reload spawn
 
 	/** HPM Custom Struct */
-	struct HPluginData **hdata;
-	unsigned int hdatac;
+	struct hplugin_data_store *hdata;
 };
 
 struct instance_interface {
diff --git a/src/map/itemdb.c b/src/map/itemdb.c
index ccedee72a..c531a4d7a 100644
--- a/src/map/itemdb.c
+++ b/src/map/itemdb.c
@@ -2100,17 +2100,8 @@ void destroy_item_data(struct item_data* self, int free_self)
 		script->free_code(self->unequip_script);
 	if( self->combos )
 		aFree(self->combos);
-	if (self->hdata)
-	{
-		int i;
-		for (i = 0; i < self->hdatac; i++ ) {
-			if (self->hdata[i]->flag.free ) {
-				aFree(self->hdata[i]->data);
-			}
-			aFree(self->hdata[i]);
-		}
-		aFree(self->hdata);
-	}
+	HPM->data_store_destroy(self->hdata);
+	self->hdata = NULL;
 #if defined(DEBUG)
 	// trash item
 	memset(self, 0xDD, sizeof(struct item_data));
diff --git a/src/map/itemdb.h b/src/map/itemdb.h
index a3edd451e..de9770aab 100644
--- a/src/map/itemdb.h
+++ b/src/map/itemdb.h
@@ -13,6 +13,7 @@
 #include "common/sql.h"
 
 struct script_code;
+struct hplugin_data_store;
 
 /**
  * Defines
@@ -490,8 +491,7 @@ struct item_data {
 	struct item_package *package;
 
 	/* HPM Custom Struct */
-	struct HPluginData **hdata;
-	unsigned int hdatac;
+	struct hplugin_data_store *hdata;
 };
 
 #define itemdb_name(n)        (itemdb->search(n)->name)
diff --git a/src/map/map.c b/src/map/map.c
index e01a25366..0ed7072d2 100644
--- a/src/map/map.c
+++ b/src/map/map.c
@@ -3239,16 +3239,8 @@ void do_final_maps(void) {
 		if( map->list[i].qi_data )
 			aFree(map->list[i].qi_data);
 
-		if( map->list[i].hdata )
-		{
-			for( v = 0; v < map->list[i].hdatac; v++ ) {
-				if( map->list[i].hdata[v]->flag.free ) {
-					aFree(map->list[i].hdata[v]->data);
-				}
-				aFree(map->list[i].hdata[v]);
-			}
-			aFree(map->list[i].hdata);
-		}
+		HPM->data_store_destroy(map->list[i].hdata);
+		map->list[i].hdata = NULL;
 	}
 
 	map->zone_db_clear();
diff --git a/src/map/map.h b/src/map/map.h
index 3ac39e54f..c3e426bb6 100644
--- a/src/map/map.h
+++ b/src/map/map.h
@@ -19,6 +19,7 @@
 struct mob_data;
 struct npc_data;
 struct channel_data;
+struct hplugin_data_store;
 
 enum E_MAPSERVER_ST {
 	MAPSERVER_ST_RUNNING = CORE_ST_LAST,
@@ -738,8 +739,7 @@ struct map_data {
 	unsigned short hpmeter_visible;
 
 	/* HPM Custom Struct */
-	struct HPluginData **hdata;
-	unsigned int hdatac;
+	struct hplugin_data_store *hdata;
 };
 
 /// Stores information about a remote map (for multi-mapserver setups).
diff --git a/src/map/mob.c b/src/map/mob.c
index 2fe9fe8fb..174d2e49f 100644
--- a/src/map/mob.c
+++ b/src/map/mob.c
@@ -4708,16 +4708,8 @@ int do_init_mob(bool minimal) {
 void mob_destroy_mob_db(int index)
 {
 	struct mob_db *data = mob->db_data[index];
-	if (data->hdata) {
-		int i;
-		for (i = 0; i < data->hdatac; i++) {
-			if (data->hdata[i]->flag.free ) {
-				aFree(data->hdata[i]->data);
-			}
-			aFree(data->hdata[i]);
-		}
-		aFree(data->hdata);
-	}
+	HPM->data_store_destroy(data->hdata);
+	data->hdata = NULL;
 	aFree(data);
 	mob->db_data[index] = NULL;
 }
diff --git a/src/map/mob.h b/src/map/mob.h
index 4b8a054b5..1142502f4 100644
--- a/src/map/mob.h
+++ b/src/map/mob.h
@@ -11,6 +11,8 @@
 #include "common/hercules.h"
 #include "common/mmo.h" // struct item
 
+struct hplugin_data_store;
+
 #define MAX_RANDOMMONSTER 5
 
 // Change this to increase the table size in your mob_db to accommodate a larger mob database.
@@ -140,8 +142,7 @@ struct mob_db {
 	struct spawn_info spawn[10];
 
 	/* HPM Custom Struct */
-	struct HPluginData **hdata;
-	unsigned int hdatac;
+	struct hplugin_data_store *hdata;
 };
 
 struct mob_data {
@@ -210,12 +211,10 @@ struct mob_data {
 	int tomb_nid;
 
 	/* HPM Custom Struct */
-	struct HPluginData **hdata;
-	unsigned int hdatac;
+	struct hplugin_data_store *hdata;
 };
 
 
-
 enum {
 	MST_TARGET = 0,
 	MST_RANDOM, //Random Target!
diff --git a/src/map/npc.c b/src/map/npc.c
index a0c14a058..85de5301b 100644
--- a/src/map/npc.c
+++ b/src/map/npc.c
@@ -2321,16 +2321,8 @@ int npc_unload(struct npc_data* nd, bool single)
 		nd->ud = NULL;
 	}
 
-	if (nd->hdata) {
-		unsigned int i;
-		for (i = 0; i < nd->hdatac; i++) {
-			if (nd->hdata[i]->flag.free) {
-				aFree(nd->hdata[i]->data);
-			}
-			aFree(nd->hdata[i]);
-		}
-		aFree(nd->hdata);
-	}
+	HPM->data_store_destroy(nd->hdata);
+	nd->hdata = NULL;
 
 	aFree(nd);
 
diff --git a/src/map/npc.h b/src/map/npc.h
index 14b89d128..06aee3f93 100644
--- a/src/map/npc.h
+++ b/src/map/npc.h
@@ -11,7 +11,7 @@
 #include "common/hercules.h"
 #include "common/db.h"
 
-struct HPluginData;
+struct hplugin_data_store;
 struct view_data;
 
 enum npc_parse_options {
@@ -103,8 +103,7 @@ struct npc_data {
 		} tomb;
 	} u;
 	/* HPData Support for npc_data */
-	struct HPluginData **hdata;
-	unsigned int hdatac;
+	struct hplugin_data_store *hdata;
 };
 
 
diff --git a/src/map/party.c b/src/map/party.c
index db285a4b4..4735dfc42 100644
--- a/src/map/party.c
+++ b/src/map/party.c
@@ -103,16 +103,8 @@ int party_db_final(DBKey key, DBData *data, va_list ap) {
 		if (p->instance)
 			aFree(p->instance);
 
-		if (p->hdata) {
-			int i;
-			for (i = 0; i < p->hdatac; i++) {
-				if (p->hdata[i]->flag.free) {
-					aFree(p->hdata[i]->data);
-				}
-				aFree(p->hdata[i]);
-			}
-			aFree(p->hdata);
-		}
+		HPM->data_store_destroy(p->hdata);
+		p->hdata = NULL;
 	}
 	return 0;
 }
@@ -608,16 +600,9 @@ int party_broken(int party_id)
 	if( p->instance )
 		aFree(p->instance);
 
-	if( p->hdata )
-	{
-		for( j = 0; j < p->hdatac; j++ ) {
-			if( p->hdata[j]->flag.free ) {
-				aFree(p->hdata[j]->data);
-			}
-			aFree(p->hdata[j]);
-		}
-		aFree(p->hdata);
-	}
+	HPM->data_store_destroy(p->hdata);
+	p->hdata = NULL;
+
 	idb_remove(party->db,party_id);
 	return 0;
 }
diff --git a/src/map/party.h b/src/map/party.h
index c7893add2..960e6da08 100644
--- a/src/map/party.h
+++ b/src/map/party.h
@@ -15,7 +15,7 @@
 #define PARTY_BOOKING_JOBS 6
 #define PARTY_BOOKING_RESULTS 10
 
-struct HPluginData;
+struct hplugin_data_store;
 
 struct party_member_data {
 	struct map_session_data *sd;
@@ -37,8 +37,7 @@ struct party_data {
 	} state;
 
 	/* HPM Custom Struct */
-	struct HPluginData **hdata;
-	unsigned int hdatac;
+	struct hplugin_data_store *hdata;
 };
 
 #define PB_NOTICE_LENGTH (36 + 1)
diff --git a/src/map/pc.c b/src/map/pc.c
index dc7014701..fee41deff 100644
--- a/src/map/pc.c
+++ b/src/map/pc.c
@@ -11332,14 +11332,8 @@ void pc_autotrade_populate(struct map_session_data *sd) {
 
 	pc->autotrade_update(sd,PAUC_START);
 
-	for(i = 0; i < data->hdatac; i++ ) {
-		if( data->hdata[i]->flag.free ) {
-			aFree(data->hdata[i]->data);
-		}
-		aFree(data->hdata[i]);
-	}
-	if( data->hdata )
-		aFree(data->hdata);
+	HPM->data_store_destroy(data->hdata);
+	data->hdata = NULL;
 
 	idb_remove(pc->at_db, sd->status.char_id);
 }
@@ -11349,16 +11343,8 @@ void pc_autotrade_populate(struct map_session_data *sd) {
  */
 int pc_autotrade_final(DBKey key, DBData *data, va_list ap) {
 	struct autotrade_vending* at_v = DB->data2ptr(data);
-	int i;
-	for(i = 0; i < at_v->hdatac; i++ ) {
-		if( at_v->hdata[i]->flag.free ) {
-			aFree(at_v->hdata[i]->data);
-		}
-		aFree(at_v->hdata[i]);
-	}
-	if( at_v->hdata )
-		aFree(at_v->hdata);
-		
+	HPM->data_store_destroy(at_v->hdata);
+	at_v->hdata = NULL;
 	return 0;
 }
 
diff --git a/src/map/pc.h b/src/map/pc.h
index e6e95978d..a74bc6c80 100644
--- a/src/map/pc.h
+++ b/src/map/pc.h
@@ -541,8 +541,7 @@ END_ZEROED_BLOCK;
 	unsigned char delayed_damage;//ref. counter bugreport:7307 [Ind/Hercules]
 
 	/* HPM Custom Struct */
-	struct HPluginData **hdata;
-	unsigned int hdatac;
+	struct hplugin_data_store *hdata;
 
 	/* expiration_time timer id */
 	int expiration_tid;
@@ -758,8 +757,7 @@ struct autotrade_vending {
 	struct s_vending vending[MAX_VENDING];
 	unsigned char vend_num;
 	/* HPM Custom Struct */
-	struct HPluginData **hdata;
-	unsigned int hdatac;
+	struct hplugin_data_store *hdata;
 };
 
 /*=====================================
diff --git a/src/map/unit.c b/src/map/unit.c
index 04a8befc2..0f8a9d7e6 100644
--- a/src/map/unit.c
+++ b/src/map/unit.c
@@ -2655,16 +2655,9 @@ int unit_free(struct block_list *bl, clr_type clrtype) {
 				sd->num_quests = sd->avail_quests = 0;
 			}
 
-			if (sd->hdata) {
-				unsigned int k;
-				for( k = 0; k < sd->hdatac; k++ ) {
-					if( sd->hdata[k]->flag.free ) {
-						aFree(sd->hdata[k]->data);
-					}
-					aFree(sd->hdata[k]);
-				}
-				aFree(sd->hdata);
-			}
+			HPM->data_store_destroy(sd->hdata);
+			sd->hdata = NULL;
+
 			break;
 		}
 		case BL_PET:
@@ -2775,17 +2768,9 @@ int unit_free(struct block_list *bl, clr_type clrtype) {
 			if( md->tomb_nid )
 				mob->mvptomb_destroy(md);
 
-			if (md->hdata)
-			{
-				unsigned int k;
-				for (k = 0; k < md->hdatac; k++) {
-					if( md->hdata[k]->flag.free ) {
-						aFree(md->hdata[k]->data);
-					}
-					aFree(md->hdata[k]);
-				}
-				aFree(md->hdata);
-			}
+			HPM->data_store_destroy(md->hdata);
+			md->hdata = NULL;
+
 			break;
 		}
 		case BL_HOM: