PVRecordFieldPtr PVRecord::findPVRecordField(
PVRecordStructurePtr const & pvrs,
PVFieldPtr const & pvField)
{
size_t desiredOffset = pvField->getFieldOffset();
PVFieldPtr pvf = pvrs->getPVField();
size_t offset = pvf->getFieldOffset();
if(offset==desiredOffset) return pvrs;
PVRecordFieldPtrArrayPtr pvrfpap = pvrs->getPVRecordFields();
PVRecordFieldPtrArray::iterator iter;
for (iter = pvrfpap.get()->begin(); iter!=pvrfpap.get()->end(); iter++ ) {
PVRecordFieldPtr pvrf = *iter;
pvf = pvrf->getPVField();
offset = pvf->getFieldOffset();
if(offset==desiredOffset) return pvrf;
size_t nextOffset = pvf->getNextFieldOffset();
if(nextOffset<=desiredOffset) continue;
return findPVRecordField(
static_pointer_cast<PVRecordStructure>(pvrf),
pvField);
}
throw std::logic_error(
recordName + " pvField "
+ pvField->getFieldName() + " not in PVRecord");
}
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");
}