自学教程：C++ GetGuidValue函数代码示例

Item* Item::CloneItem(uint32 count, Player const* player) const{    Item* newItem = CreateItem(GetEntry(), count, player, GetItemRandomPropertyId());    if (!newItem)        return NULL;    newItem->SetGuidValue(ITEM_FIELD_CREATOR,     GetGuidValue(ITEM_FIELD_CREATOR));    newItem->SetGuidValue(ITEM_FIELD_GIFTCREATOR, GetGuidValue(ITEM_FIELD_GIFTCREATOR));    newItem->SetUInt32Value(ITEM_FIELD_FLAGS,     GetUInt32Value(ITEM_FIELD_FLAGS));    newItem->SetUInt32Value(ITEM_FIELD_DURATION,  GetUInt32Value(ITEM_FIELD_DURATION));    return newItem;}

Item* Item::CloneItem(uint32 count, Player const* player /*= nullptr*/) const{    Item* newItem = CreateItem(GetEntry(), count, player);    if (!newItem)        return nullptr;    newItem->SetGuidValue(ITEM_FIELD_CREATOR, GetGuidValue(ITEM_FIELD_CREATOR));    newItem->SetGuidValue(ITEM_FIELD_GIFTCREATOR, GetGuidValue(ITEM_FIELD_GIFTCREATOR));    newItem->SetUInt32Value(ITEM_FIELD_FLAGS,        GetUInt32Value(ITEM_FIELD_FLAGS) & ~(ITEM_FIELD_FLAG_REFUNDABLE | ITEM_FIELD_FLAG_BOP_TRADEABLE));    newItem->SetUInt32Value(ITEM_FIELD_DURATION,     GetUInt32Value(ITEM_FIELD_DURATION));    // player CAN be NULL in which case we must not update random properties because that accesses player's item update queue    if (player)        newItem->SetItemRandomProperties(GetItemRandomPropertyId());    return newItem;}

bool Item::LoadFromDB(uint32 guidLow, Field* fields, ObjectGuid ownerGuid){    // create item before any checks for store correct guid    // and allow use "FSetState(ITEM_REMOVED); SaveToDB();" for deleting item from DB    Object::_Create(ObjectGuid(HIGHGUID_ITEM, guidLow));    if (!LoadValues(fields[0].GetString()))    {        sLog.outError("Item::LoadFromDB: %s have broken data in `data` field. Can't be loaded.", GetGuidStr().c_str());        return false;    }    SetText(fields[1].GetCppString());    bool needSave = false;                                  // need explicit save data at load fixes    // overwrite possible wrong/corrupted guid    ObjectGuid new_item_guid = ObjectGuid(HIGHGUID_ITEM, guidLow);    if (GetGuidValue(OBJECT_FIELD_GUID) != new_item_guid)    {        SetGuidValue(OBJECT_FIELD_GUID, new_item_guid);        needSave = true;    }    ItemPrototype const* proto = GetProto();    if (!proto)        return false;    // update max durability (and durability) if need    if (proto->MaxDurability != GetUInt32Value(ITEM_FIELD_MAXDURABILITY))    {        SetUInt32Value(ITEM_FIELD_MAXDURABILITY, proto->MaxDurability);        if (GetUInt32Value(ITEM_FIELD_DURABILITY) > proto->MaxDurability)            SetUInt32Value(ITEM_FIELD_DURABILITY, proto->MaxDurability);        needSave = true;    }    // recalculate suffix factor    if (GetItemRandomPropertyId() < 0)    {        if (UpdateItemSuffixFactor())            needSave = true;    }    // Remove bind flag for items vs NO_BIND set    if (IsSoulBound() && proto->Bonding == NO_BIND)    {        ApplyModFlag(ITEM_FIELD_FLAGS, ITEM_DYNFLAG_BINDED, false);        needSave = true;    }    // update duration if need, and remove if not need    if ((proto->Duration == 0) != (GetUInt32Value(ITEM_FIELD_DURATION) == 0))    {        SetUInt32Value(ITEM_FIELD_DURATION, proto->Duration);        needSave = true;    }    // set correct owner    if (ownerGuid && GetOwnerGuid() != ownerGuid)    {        SetOwnerGuid(ownerGuid);        needSave = true;    }    // set correct wrapped state    if (HasFlag(ITEM_FIELD_FLAGS, ITEM_DYNFLAG_WRAPPED))    {        // wrapped item must be wrapper (used version that not stackable)        if (!(proto->Flags & ITEM_FLAG_WRAPPER) || GetMaxStackCount() > 1)        {            RemoveFlag(ITEM_FIELD_FLAGS, ITEM_DYNFLAG_WRAPPED);            needSave = true;            // also cleanup for sure gift table            DeleteGiftsFromDB();        }    }    if (needSave)                                          // normal item changed state set not work at loading    {        std::ostringstream ss;        for (uint16 i = 0; i < m_valuesCount; ++i)            ss << GetUInt32Value(i) << " ";        static SqlStatementID updItem;        SqlStatement stmt = CharacterDatabase.CreateStatement(updItem, "UPDATE item_instance SET owner_guid = ?, data = ? WHERE guid = ?");        stmt.PExecute(GetOwnerGuid().GetCounter(), ss.str().c_str(), guidLow);    }    return true;}

void Item::SaveToDB(SQLTransaction& trans){    bool isInTransaction = bool(trans);    if (!isInTransaction)        trans = CharacterDatabase.BeginTransaction();    ObjectGuid::LowType guid = GetGUID().GetCounter();    switch (uState)    {        case ITEM_NEW:        case ITEM_CHANGED:        {            uint8 index = 0;            PreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(uState == ITEM_NEW ? CHAR_REP_ITEM_INSTANCE : CHAR_UPD_ITEM_INSTANCE);            stmt->setUInt32(  index, GetEntry());            stmt->setUInt32(++index, GetOwnerGUID().GetCounter());            stmt->setUInt32(++index, GetGuidValue(ITEM_FIELD_CREATOR).GetCounter());            stmt->setUInt32(++index, GetGuidValue(ITEM_FIELD_GIFTCREATOR).GetCounter());            stmt->setUInt32(++index, GetCount());            stmt->setUInt32(++index, GetUInt32Value(ITEM_FIELD_DURATION));            std::ostringstream ssSpells;            for (uint8 i = 0; i < MAX_ITEM_PROTO_SPELLS; ++i)                ssSpells << GetSpellCharges(i) << ' ';            stmt->setString(++index, ssSpells.str());            stmt->setUInt32(++index, GetUInt32Value(ITEM_FIELD_FLAGS));            std::ostringstream ssEnchants;            for (uint8 i = 0; i < MAX_ENCHANTMENT_SLOT; ++i)            {                ssEnchants << GetEnchantmentId(EnchantmentSlot(i)) << ' ';                ssEnchants << GetEnchantmentDuration(EnchantmentSlot(i)) << ' ';                ssEnchants << GetEnchantmentCharges(EnchantmentSlot(i)) << ' ';            }            stmt->setString(++index, ssEnchants.str());            stmt->setInt16 (++index, GetItemRandomPropertyId());            stmt->setUInt16(++index, GetUInt32Value(ITEM_FIELD_DURABILITY));            stmt->setUInt32(++index, GetUInt32Value(ITEM_FIELD_CREATE_PLAYED_TIME));            stmt->setString(++index, m_text);            stmt->setUInt32(++index, guid);            trans->Append(stmt);            if ((uState == ITEM_CHANGED) && HasFlag(ITEM_FIELD_FLAGS, ITEM_FIELD_FLAG_WRAPPED))            {                stmt = CharacterDatabase.GetPreparedStatement(CHAR_UPD_GIFT_OWNER);                stmt->setUInt32(0, GetOwnerGUID().GetCounter());                stmt->setUInt32(1, guid);                trans->Append(stmt);            }            break;        }        case ITEM_REMOVED:        {            PreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(CHAR_DEL_ITEM_INSTANCE);            stmt->setUInt32(0, guid);            trans->Append(stmt);            if (HasFlag(ITEM_FIELD_FLAGS, ITEM_FIELD_FLAG_WRAPPED))            {                stmt = CharacterDatabase.GetPreparedStatement(CHAR_DEL_GIFT);                stmt->setUInt32(0, guid);                trans->Append(stmt);            }            if (!isInTransaction)                CharacterDatabase.CommitTransaction(trans);            // Delete the items if this is a container            if (!loot.isLooted())                sLootItemStorage->RemoveStoredLootForContainer(GetGUID().GetCounter());            delete this;            return;        }        case ITEM_UNCHANGED:            break;    }    SetState(ITEM_UNCHANGED);    if (!isInTransaction)        CharacterDatabase.CommitTransaction(trans);}

bool Item::LoadFromDB(uint32 guidLow, uint64 owner_guid, QueryResult *result){    // create item before any checks for store correct guid    // and allow use "FSetState(ITEM_REMOVED); SaveToDB();" for deleting item from DB    Object::_Create(guidLow, 0, HIGHGUID_ITEM);    bool delete_result = false;    if(!result)    {        result = CharacterDatabase.PQuery("SELECT data FROM item_instance WHERE guid = '%u'", guidLow);        delete_result = true;    }    if (!result)    {        sLog.outError("Item (GUID: %u owner: %u) not found in table `item_instance`, can't load. ", guidLow, GUID_LOPART(owner_guid));        return false;    }    Field *fields = result->Fetch();    if (!LoadValues(fields[0].GetString()))    {        sLog.outError("Item #%d have broken data in `data` field. Can't be loaded.", guidLow);        if (delete_result) delete result;        return false;    }    bool need_save = false;                                 // need explicit save data at load fixes    // overwrite possible wrong/corrupted guid    ObjectGuid new_item_guid = ObjectGuid(HIGHGUID_ITEM, guidLow);    if (GetGuidValue(OBJECT_FIELD_GUID) != new_item_guid)    {        SetGuidValue(OBJECT_FIELD_GUID, new_item_guid);        need_save = true;    }    if (delete_result)        delete result;    ItemPrototype const* proto = GetProto();    if(!proto)        return false;    // update max durability (and durability) if need    if(proto->MaxDurability!= GetUInt32Value(ITEM_FIELD_MAXDURABILITY))    {        SetUInt32Value(ITEM_FIELD_MAXDURABILITY,proto->MaxDurability);        if(GetUInt32Value(ITEM_FIELD_DURABILITY) > proto->MaxDurability)            SetUInt32Value(ITEM_FIELD_DURABILITY,proto->MaxDurability);        need_save = true;    }    // recalculate suffix factor    if(GetItemRandomPropertyId() < 0)    {        if(UpdateItemSuffixFactor())            need_save = true;    }    // Remove bind flag for items vs NO_BIND set    if (IsSoulBound() && proto->Bonding == NO_BIND)    {        ApplyModFlag(ITEM_FIELD_FLAGS,ITEM_FLAGS_BINDED, false);        need_save = true;    }    // update duration if need, and remove if not need    if ((proto->Duration == 0) != (GetUInt32Value(ITEM_FIELD_DURATION) == 0))    {        SetUInt32Value(ITEM_FIELD_DURATION, proto->Duration);        need_save = true;    }    // set correct owner    if (owner_guid != 0 && GetOwnerGUID() != owner_guid)    {        SetOwnerGUID(owner_guid);        need_save = true;    }    if (need_save)                                          // normal item changed state set not work at loading    {        std::ostringstream ss;        ss << "UPDATE item_instance SET data = '";        for(uint16 i = 0; i < m_valuesCount; ++i )            ss << GetUInt32Value(i) << " ";        ss << "', owner_guid = '" << GUID_LOPART(GetOwnerGUID()) << "' WHERE guid = '" << guidLow << "'";        CharacterDatabase.Execute( ss.str().c_str() );    }    return true;}

bool Item::LoadFromDB(uint32 guidLow, uint64 owner_guid, Field *fields){    // create item before any checks for store correct guid    // and allow use "FSetState(ITEM_REMOVED); SaveToDB();" for deleting item from DB    Object::_Create(guidLow, 0, HIGHGUID_ITEM);    if (!LoadValues(fields[0].GetString()))    {        sLog.outError("Item #%d have broken data in `data` field. Can't be loaded.", guidLow);        return false;    }    bool need_save = false;                                 // need explicit save data at load fixes    // overwrite possible wrong/corrupted guid    ObjectGuid new_item_guid = ObjectGuid(HIGHGUID_ITEM, guidLow);    if (GetGuidValue(OBJECT_FIELD_GUID) != new_item_guid)    {        SetGuidValue(OBJECT_FIELD_GUID, new_item_guid);        need_save = true;    }    ItemPrototype const* proto = GetProto();    if(!proto)        return false;    // update max durability (and durability) if need    if(proto->MaxDurability!= GetUInt32Value(ITEM_FIELD_MAXDURABILITY))    {        SetUInt32Value(ITEM_FIELD_MAXDURABILITY,proto->MaxDurability);        if(GetUInt32Value(ITEM_FIELD_DURABILITY) > proto->MaxDurability)            SetUInt32Value(ITEM_FIELD_DURABILITY,proto->MaxDurability);        need_save = true;    }    // Remove bind flag for items vs NO_BIND set    if (IsSoulBound() && proto->Bonding == NO_BIND)    {        ApplyModFlag(ITEM_FIELD_FLAGS, ITEM_DYNFLAG_BINDED, false);        need_save = true;    }    // update duration if need, and remove if not need    if ((proto->Duration == 0) != (GetUInt32Value(ITEM_FIELD_DURATION) == 0))    {        SetUInt32Value(ITEM_FIELD_DURATION, proto->Duration);        need_save = true;    }    // set correct owner    if (owner_guid != 0 && GetOwnerGUID() != owner_guid)    {        SetOwnerGUID(owner_guid);        need_save = true;    }    // set correct wrapped state    if (HasFlag(ITEM_FIELD_FLAGS, ITEM_DYNFLAG_WRAPPED))    {        // wrapped item must be wrapper (used version that not stackable)        if (!(proto->Flags & ITEM_FLAG_WRAPPER) || GetMaxStackCount() > 1)        {            RemoveFlag(ITEM_FIELD_FLAGS, ITEM_DYNFLAG_WRAPPED);            need_save = true;            // also cleanup for sure gift table            CharacterDatabase.PExecute("DELETE FROM character_gifts WHERE item_guid = '%u'", GetGUIDLow());        }    }    if (need_save)                                          // normal item changed state set not work at loading    {        std::ostringstream ss;        ss << "UPDATE item_instance SET data = '";        for(uint16 i = 0; i < m_valuesCount; ++i )            ss << GetUInt32Value(i) << " ";        ss << "', owner_guid = '" << GUID_LOPART(GetOwnerGUID()) << "' WHERE guid = '" << guidLow << "'";        CharacterDatabase.Execute( ss.str().c_str() );    }    return true;}