fn prev()

in common/rusty_leveldb_sgx/src/version.rs [475:495]

• 19 lines of code
• 5 McCabe index (conditional complexity)

    fn prev(&mut self) -> bool {
        if let Some(ref mut t) = self.current {
            if t.prev() {
                return true;
            } else if self.current_ix > 0 {
                let f = &self.files[self.current_ix - 1];
                // Find previous table, seek to last entry.
                if let Ok(tbl) = self.cache.borrow_mut().get_table(f.borrow().num) {
                    let mut iter = tbl.iter();
                    iter.seek(&f.borrow().largest);
                    // The saved largest key must be in the table.
                    assert!(iter.valid());
                    self.current_ix -= 1;
                    *t = iter;
                    return true;
                }
            }
        }
        self.reset();
        false
    }