void COPCItem::readSync(OPCItemData &data, OPCDATASOURCE source){
CAtlArray<COPCItem *> items;
items.Add(this);
COPCItem_DataMap opcData;
group->readSync(items, opcData, source);
COPCItem_DataMap::CPair* pos = opcData.Lookup(this);
if (pos){
OPCItemData * readData = opcData.GetValueAt(pos);
if (readData && !FAILED(readData->error)){
data = *readData;
return;
}
}
throw OPCException("Read failed");
}
/**
* Enter the OPC items data that resulted from an operation
*/
static void updateOPCData(COPCItem_DataMap &opcData, DWORD count, OPCHANDLE * clienthandles,
VARIANT* values, WORD * quality,FILETIME * time, HRESULT * errors){
// see page 136 - returned arrays may be out of order
for (unsigned i = 0; i < count; i++){
// TODO this is bad - server could corrupt address - need to use look up table
COPCItem * item = (COPCItem *)clienthandles[i];
CAtlMap<COPCItem *, OPCItemData *>::CPair* pair = opcData.Lookup(item);
OPCItemData * data = NULL;
if (FAILED(errors[i])){
data = new OPCItemData(errors[i]);
} else {
data = new OPCItemData(time[i],quality[i],values[i],errors[i]);
}
if (pair == NULL){
opcData.SetAt(item,data);
} else {
opcData.SetValueAt(pair,data);
}
}
}