PVFieldPtr PVStructure::getSubField(size_t fieldOffset) const
{
if(fieldOffset<=getFieldOffset()) {
return nullPVField;
}
if(fieldOffset>getNextFieldOffset()) return nullPVField;
size_t numFields = pvFields.size();
for(size_t i=0; i<numFields; i++) {
PVFieldPtr pvField = pvFields[i];
if(pvField->getFieldOffset()==fieldOffset) return pvFields[i];
if(pvField->getNextFieldOffset()<=fieldOffset) continue;
if(pvField->getField()->getType()==structure) {
PVStructure *pvStructure = static_cast<PVStructure *>(pvField.get());
return pvStructure->getSubField(fieldOffset);
}
}
throw std::logic_error("PVStructure.getSubField: Logic error");
}
std::tr1::shared_ptr<PVCopy> PVCopy::create(
PVRecord &pvRecord, PVStructure &request, String structureName)
{
PVStructure *pvRequest = &request;
if(structureName.length()>0) {
if(pvRequest->getStructure()->getNumberFields()>0) {
PVStructure *pvStructure
= pvRequest->getStructureField(structureName);
if(pvStructure==0) return std::tr1::shared_ptr<PVCopy>();
pvRequest = pvStructure;
}
}
std::tr1::shared_ptr<PVCopy> pvCopy =
std::tr1::shared_ptr<PVCopy>(new PVCopy(pvRecord));
PVStructure *pvStruct = pvRequest;
if(pvRequest->getSubField("field")!=0) {
pvStruct = pvRequest->getStructureField("field");
}
pvCopy->init(*pvStruct);
return pvCopy;
}
