Source Code Help

[Zharor]

enum e_additem_result pc_additem(map_session_data *sd,struct item *item,int amount,e_log_pick_type log_type)
{
	struct item_data* data;
	struct homun_data* hd;
	int i;
	unsigned int w;
	int amt2 = 0;

	if (item->nameid > 8030 && item->nameid < 9001) {
		for (i = 8031; i < 9001; i++) { 
			amt2 += pc_countitem(sd, i);
		}

		amt2 += 1;
		if ((hd = sd->hd) == NULL) {
			amt2 -= 1;
		}

		if ((sd->status.lock) == 0)
			amt2 = 0;

		if (amt2 >= 6) {
			storage_storageadd(sd, item->nameid, 1, LOG_TYPE_NONE);
			return 7;
		}
	}

int pc_countitem(struct map_session_data* sd, int itemid)        //[Hold -brA]
{
	struct item_data* it_tmp;
	int i, id, amt = 0;

	if (!(it_tmp = item_db.exists(itemid)))
		return 0;

	id = it_tmp->nameid;

	for (i = 0; i < MAX_INVENTORY; i++)
		if (sd->inventory.u.items_inventory[i].nameid == id)
			amt += sd->inventory.u.items_inventory[i].amount;

	return amt;
}

Anyone can help me adapt this code for Reathena pls 

Code 01 ERROR - storage_storageadd(sd, item->nameid, 1, LOG_TYPE_NONE);

Code 02 ERROR - if(! (it_tmp = item_db.exists(itemid))) return 0 ;