From f7eced03fd173ac0f61ff893a6ab38f87fac9d6c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Renault?= <renault.cle@gmail.com>
Date: Mon, 8 Apr 2019 16:16:31 +0200
Subject: [PATCH] chore: Using a fork of the fst library that support Arc<[u8]>

---
 meilidb-core/Cargo.toml                | 11 +++++++++--
 meilidb-core/src/data/shared_data.rs   | 16 +++++++++++++---
 meilidb-core/src/shared_data_cursor.rs |  4 ++--
 3 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/meilidb-core/Cargo.toml b/meilidb-core/Cargo.toml
index 233243016..f0e6dc6e0 100644
--- a/meilidb-core/Cargo.toml
+++ b/meilidb-core/Cargo.toml
@@ -6,10 +6,8 @@ edition = "2018"
 
 [dependencies]
 byteorder = "1.3.1"
-fst = "0.3.3"
 hashbrown = "0.1.8"
 lazy_static = "1.2.0"
-levenshtein_automata = { version = "0.1.1", features = ["fst_automaton"] }
 log = "0.4.6"
 meilidb-tokenizer = { path = "../meilidb-tokenizer", version = "0.1.0" }
 rayon = "1.0.3"
@@ -17,6 +15,15 @@ sdset = "0.3.1"
 serde = { version = "1.0.88", features = ["derive"] }
 slice-group-by = "0.2.4"
 
+[dependencies.fst]
+git = "https://github.com/Kerollmops/fst.git"
+branch = "arc-byte-slice"
+
+[dependencies.levenshtein_automata]
+git = "https://github.com/Kerollmops/levenshtein-automata.git"
+branch = "arc-byte-slice"
+features = ["fst_automaton"]
+
 [features]
 i128 = ["byteorder/i128"]
 nightly = ["hashbrown/nightly", "slice-group-by/nightly"]
diff --git a/meilidb-core/src/data/shared_data.rs b/meilidb-core/src/data/shared_data.rs
index 100f837f7..fd505c6d9 100644
--- a/meilidb-core/src/data/shared_data.rs
+++ b/meilidb-core/src/data/shared_data.rs
@@ -1,9 +1,9 @@
 use std::sync::Arc;
 use std::ops::Deref;
 
-#[derive(Default, Clone)]
+#[derive(Clone)]
 pub struct SharedData {
-    pub bytes: Arc<Vec<u8>>,
+    pub bytes: Arc<[u8]>,
     pub offset: usize,
     pub len: usize,
 }
@@ -15,7 +15,7 @@ impl SharedData {
         SharedData::new(bytes, 0, len)
     }
 
-    pub fn new(bytes: Arc<Vec<u8>>, offset: usize, len: usize) -> SharedData {
+    pub fn new(bytes: Arc<[u8]>, offset: usize, len: usize) -> SharedData {
         SharedData { bytes, offset, len }
     }
 
@@ -33,6 +33,16 @@ impl SharedData {
     }
 }
 
+impl Default for SharedData {
+    fn default() -> SharedData {
+        SharedData {
+            bytes: Arc::from(Vec::new()),
+            offset: 0,
+            len: 0,
+        }
+    }
+}
+
 impl Deref for SharedData {
     type Target = [u8];
 
diff --git a/meilidb-core/src/shared_data_cursor.rs b/meilidb-core/src/shared_data_cursor.rs
index 00d36884a..9eeac472f 100644
--- a/meilidb-core/src/shared_data_cursor.rs
+++ b/meilidb-core/src/shared_data_cursor.rs
@@ -7,12 +7,12 @@ pub struct SharedDataCursor(Cursor<SharedData>);
 impl SharedDataCursor {
     pub fn from_bytes(bytes: Vec<u8>) -> SharedDataCursor {
         let len = bytes.len();
-        let bytes = Arc::new(bytes);
+        let bytes = Arc::from(bytes);
 
         SharedDataCursor::from_shared_bytes(bytes, 0, len)
     }
 
-    pub fn from_shared_bytes(bytes: Arc<Vec<u8>>, offset: usize, len: usize) -> SharedDataCursor {
+    pub fn from_shared_bytes(bytes: Arc<[u8]>, offset: usize, len: usize) -> SharedDataCursor {
         let data = SharedData::new(bytes, offset, len);
         let cursor = Cursor::new(data);