HumdrumFileBasic HumdrumFileBasic::extract(int aField) {
int fieldNumber = aField;
HumdrumRecord aRecord;
HumdrumFileBasic output;
for (int i=0; i<getNumLines(); i++) {
switch(records[i]->getType()) {
case E_humrec_data:
case E_humrec_data_comment:
case E_humrec_data_kern_measure:
case E_humrec_data_interpretation:
if (aField < 0) {
fieldNumber = records[i]->getFieldCount() + aField;
if (fieldNumber < 0) {
fieldNumber = 0;
}
} else {
fieldNumber = aField;
}
aRecord.setLine((*records[i])[fieldNumber]);
aRecord.setExInterp(0, records[i]->getExInterpNum(fieldNumber));
output.appendLine(aRecord);
break;
case E_humrec_empty:
output.appendLine(records[i]);
break;
case E_humrec_none:
case E_humrec_global_comment:
default:
output.appendLine(records[i]);
}
}
return output;
}
void HumdrumFileBasic::appendLine(const char* aLine) {
HumdrumRecord* aRecord;
aRecord = new HumdrumRecord;
aRecord->setLine(aLine);
records[records.getSize()] = aRecord;
}