--- a/rust/hg-core/src/dirstate.rs	Wed Jul 10 10:16:28 2019 +0200
+++ b/rust/hg-core/src/dirstate.rs	Tue Jul 09 11:49:49 2019 +0200
@@ -1,16 +1,25 @@
+// dirstate module
+//
+// Copyright 2019 Raphaël Gomès <rgomes@octobus.net>
+//
+// This software may be used and distributed according to the terms of the
+// GNU General Public License version 2 or any later version.
+
+use std::collections::HashMap;
+
 pub mod dirs_multiset;
 pub mod parsers;
 
-#[derive(Debug, PartialEq, Copy, Clone)]
-pub struct DirstateParents<'a> {
-    pub p1: &'a [u8],
-    pub p2: &'a [u8],
+#[derive(Debug, PartialEq, Clone)]
+pub struct DirstateParents {
+    pub p1: [u8; 20],
+    pub p2: [u8; 20],
 }
 
 /// 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)]
+#[derive(Debug, PartialEq, Copy, Clone)]
 pub struct DirstateEntry {
     pub state: i8,
     pub mode: i32,
@@ -18,19 +27,12 @@
     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>>;
+pub type StateMap = HashMap<Vec<u8>, DirstateEntry>;
+pub type CopyMap = HashMap<Vec<u8>, Vec<u8>>;
 
 /// The Python implementation passes either a mapping (dirstate) or a flat
 /// iterable (manifest)
-pub enum DirsIterable {
-    Dirstate(DirstateVec),
-    Manifest(Vec<Vec<u8>>),
+pub enum DirsIterable<'a> {
+    Dirstate(&'a HashMap<Vec<u8>, DirstateEntry>),
+    Manifest(&'a Vec<Vec<u8>>),
 }