fn get_internal()

in common/rusty_leveldb_sgx/src/db_impl.rs [441:485]
33 lines of code
6 McCabe index (conditional complexity)

    fn get_internal(&mut self, seq: SequenceNumber, key: &[u8]) -> Result<Option<Vec<u8>>> {
        // Using this lookup key will skip all entries with higher sequence numbers, because they
        // will compare "Lesser" using the InternalKeyCmp
        let lkey = LookupKey::new(key, seq);

        match self.mem.get(&lkey) {
            (Some(v), _) => return Ok(Some(v)),
            // deleted entry
            (None, true) => return Ok(None),
            // not found entry
            (None, false) => {}
        }

        if let Some(imm) = self.imm.as_ref() {
            match imm.get(&lkey) {
                (Some(v), _) => return Ok(Some(v)),
                // deleted entry
                (None, true) => return Ok(None),
                // not found entry
                (None, false) => {}
            }
        }

        let mut do_compaction = false;
        let mut result = None;

        // Limiting the borrow scope of self.current.
        {
            let current = self.current();
            let mut current = current.borrow_mut();
            if let Ok(Some((v, st))) = current.get(lkey.internal_key()) {
                if current.update_stats(st) {
                    do_compaction = true;
                }
                result = Some(v)
            }
        }

        if do_compaction {
            if let Err(e) = self.maybe_do_compaction() {
                log!(self.opt.log, "error while doing compaction in get: {}", e);
            }
        }
        Ok(result)
    }