// loadMergeMarshal loads an existing bunch, merges the IdRefs and
// marshals the result again.
func (index *bunchRefCache) loadMergeMarshal(keyBuf []byte, newBunch []element.IdRefs) []byte {
data, err := index.db.Get(index.ro, keyBuf)
if err != nil {
panic(err)
}
var bunch []element.IdRefs
if data != nil {
bunch = binary.UnmarshalIdRefsBunch(data)
}
if bunch == nil {
bunch = newBunch
} else {
bunch = mergeBunch(bunch, newBunch)
}
data = binary.MarshalIdRefsBunch(bunch)
return data
}
func (index *bunchRefCache) Add(id, ref int64) error {
keyBuf := idToKeyBuf(index.getBunchId(id))
data, err := index.db.Get(index.ro, keyBuf)
if err != nil {
return err
}
var idRefs []element.IdRefs
if data != nil {
idRefs = binary.UnmarshalIdRefsBunch(data)
}
idRefBunch := idRefBunch{index.getBunchId(id), idRefs}
idRef := idRefBunch.getCreate(id)
idRef.Add(ref)
data = binary.MarshalIdRefsBunch(idRefBunch.idRefs)
return index.db.Put(index.wo, keyBuf, data)
}
func (index *bunchRefCache) Delete(id int64) error {
if index.linearImport {
panic("programming error: delete not supported in linearImport mode")
}
keyBuf := idToKeyBuf(index.getBunchId(id))
data, err := index.db.Get(index.ro, keyBuf)
if err != nil {
return err
}
if data != nil {
idRefs := binary.UnmarshalIdRefsBunch(data)
idRefBunch := idRefBunch{index.getBunchId(id), idRefs}
idRef := idRefBunch.get(id)
if idRef != nil {
idRef.Refs = []int64{}
data := binary.MarshalIdRefsBunch(idRefs)
return index.db.Put(index.wo, keyBuf, data)
}
}
return nil
}