fn save_to()

in common/rusty_leveldb_sgx/src/version_set.rs [815:846]

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

    fn save_to(&mut self, cmp: &InternalKeyCmp, base: &Shared<Version>, v: &mut Version) {
        for level in 0..NUM_LEVELS {
            sort_files_by_smallest(cmp, &mut self.added[level]);
            // The base version should already have sorted files.
            sort_files_by_smallest(cmp, &mut base.borrow_mut().files[level]);

            let added = self.added[level].clone();
            let basefiles = base.borrow().files[level].clone();
            v.files[level].reserve(basefiles.len() + self.added[level].len());

            let iadded = added.into_iter();
            let ibasefiles = basefiles.into_iter();
            let merged = merge_iters(iadded, ibasefiles, |a, b| {
                cmp.cmp(&a.borrow().smallest, &b.borrow().smallest)
            });
            for m in merged {
                self.maybe_add_file(cmp, v, level, m);
            }

            // Make sure that there is no overlap in higher levels.
            if level == 0 {
                continue;
            }
            for i in 1..v.files[level].len() {
                let (prev_end, this_begin) = (
                    &v.files[level][i - 1].borrow().largest,
                    &v.files[level][i].borrow().smallest,
                );
                assert!(cmp.cmp(prev_end, this_begin) < Ordering::Equal);
            }
        }
    }