rust/hg-core/src/dirstate.rs

tests: register test-merge-combination.t as small but slow

run-tests.py use file size as an heuristic for test run time. The new
`test-merge-combination.t` is a small file that do a lot of processing. As a
result it tend to be scheduled really late but delay the full test run by a lot.

On an example test run, the one-before-last test completed 279s after the start
of the run, while `test-merge-combination.t` finished 355s after it. A 76s
delay. This delay can be avoided since `test-merge-combination.t` only got started
175s after the start of the run.

pub mod dirs_multiset;
pub mod parsers;

#[derive(Debug, PartialEq, Copy, Clone)]
pub struct DirstateParents<'a> {
    pub p1: &'a [u8],
    pub p2: &'a [u8],
}

/// The C implementation uses all signed types. This will be an issue
/// either when 4GB+ source files are commonplace or in 2038, whichever
/// comes first.
#[derive(Debug, PartialEq)]
pub struct DirstateEntry {
    pub state: i8,
    pub mode: i32,
    pub mtime: i32,
    pub size: i32,
}

pub type DirstateVec = Vec<(Vec<u8>, DirstateEntry)>;

#[derive(Debug, PartialEq)]
pub struct CopyVecEntry<'a> {
    pub path: &'a [u8],
    pub copy_path: &'a [u8],
}

pub type CopyVec<'a> = Vec<CopyVecEntry<'a>>;

/// The Python implementation passes either a mapping (dirstate) or a flat
/// iterable (manifest)
pub enum DirsIterable {
    Dirstate(DirstateVec),
    Manifest(Vec<Vec<u8>>),
}