Mercurial > public > mercurial-scm > hg

annotate rust/hg-core/src/revlog/revlog.rs @ 45603:be951ca95b08

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
hg-core: use `.or(Err(Error))` not `.map_err(|_| Error)` (D9100#inline-15067) Differential Revision: https://phab.mercurial-scm.org/D9108
author Antoine cezar<acezar@chwitlabs.fr>
date Mon, 28 Sep 2020 16:52:35 +0200
parents 1cef583541c0
children 7252f5237352
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
1 use std::borrow::Cow;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
2 use std::fs::File;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
3 use std::io::Read;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
4 use std::ops::Deref;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
5 use std::path::Path;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
6
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
7 use byteorder::{BigEndian, ByteOrder};
45531
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
8 use crypto::digest::Digest;
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
9 use crypto::sha1::Sha1;
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
10 use flate2::read::ZlibDecoder;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
11 use memmap::{Mmap, MmapOptions};
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
12 use micro_timer::timed;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
13 use zstd;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
14
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
15 use super::index::Index;
45531
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
16 use super::node::{NODE_BYTES_LENGTH, NULL_NODE_ID};
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
17 use super::patch;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
18 use crate::revlog::Revision;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
19
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
20 pub enum RevlogError {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
21 IoError(std::io::Error),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
22 UnsuportedVersion(u16),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
23 InvalidRevision,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
24 Corrupted,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
25 UnknowDataFormat(u8),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
26 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
27
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
28 fn mmap_open(path: &Path) -> Result<Mmap, std::io::Error> {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
29 let file = File::open(path)?;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
30 let mmap = unsafe { MmapOptions::new().map(&file) }?;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
31 Ok(mmap)
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
32 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
33
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
34 /// Read only implementation of revlog.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
35 pub struct Revlog {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
36 /// When index and data are not interleaved: bytes of the revlog index.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
37 /// When index and data are interleaved: bytes of the revlog index and
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
38 /// data.
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
39 index: Index,
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
40 /// When index and data are not interleaved: bytes of the revlog data
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
41 data_bytes: Option<Box<dyn Deref<Target = [u8]> + Send>>,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
42 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
43
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
44 impl Revlog {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
45 /// Open a revlog index file.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
46 ///
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
47 /// It will also open the associated data file if index and data are not
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
48 /// interleaved.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
49 #[timed]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
50 pub fn open(index_path: &Path) -> Result<Self, RevlogError> {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
51 let index_mmap =
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
52 mmap_open(&index_path).map_err(RevlogError::IoError)?;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
53
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
54 let version = get_version(&index_mmap);
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
55 if version != 1 {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
56 return Err(RevlogError::UnsuportedVersion(version));
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
57 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
58
45602
1cef583541c0 hg-core: return Err if `offset != bytes.len()`
Antoine cezar<acezar@chwitlabs.fr>
parents: 45601
diff changeset
59 let index = Index::new(Box::new(index_mmap))?;
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
60
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
61 // TODO load data only when needed //
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
62 // type annotation required
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
63 // won't recognize Mmap as Deref<Target = [u8]>
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
64 let data_bytes: Option<Box<dyn Deref<Target = [u8]> + Send>> =
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
65 if index.is_inline() {
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
66 None
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
67 } else {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
68 let data_path = index_path.with_extension("d");
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
69 let data_mmap =
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
70 mmap_open(&data_path).map_err(RevlogError::IoError)?;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
71 Some(Box::new(data_mmap))
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
72 };
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
73
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
74 Ok(Revlog { index, data_bytes })
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
75 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
76
45534
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
77 /// Return number of entries of the `Revlog`.
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
78 pub fn len(&self) -> usize {
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
79 self.index.len()
45534
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
80 }
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
81
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
82 /// Returns `true` if the `Revlog` has zero `entries`.
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
83 pub fn is_empty(&self) -> bool {
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
84 self.index.is_empty()
45534
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
85 }
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
86
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
87 /// Return the full data associated to a node.
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
88 #[timed]
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
89 pub fn get_node_rev(&self, node: &[u8]) -> Result<Revision, RevlogError> {
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
90 // This is brute force. But it is fast enough for now.
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
91 // Optimization will come later.
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
92 for rev in (0..self.len() as Revision).rev() {
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
93 let index_entry =
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
94 self.index.get_entry(rev).ok_or(RevlogError::Corrupted)?;
45534
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
95 if node == index_entry.hash() {
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
96 return Ok(rev);
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
97 }
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
98 }
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
99 Err(RevlogError::InvalidRevision)
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
100 }
4f11a67a12fb hg-core: add `Revlog.get_node_rev`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45531
diff changeset
101
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
102 /// Return the full data associated to a revision.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
103 ///
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
104 /// All entries required to build the final data out of deltas will be
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
105 /// retrieved as needed, and the deltas will be applied to the inital
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
106 /// snapshot to rebuild the final data.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
107 #[timed]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
108 pub fn get_rev_data(&self, rev: Revision) -> Result<Vec<u8>, RevlogError> {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
109 // Todo return -> Cow
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
110 let mut entry = self.get_entry(rev)?;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
111 let mut delta_chain = vec![];
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
112 while let Some(base_rev) = entry.base_rev {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
113 delta_chain.push(entry);
45603
be951ca95b08 hg-core: use `.or(Err(Error))` not `.map_err(|_| Error)` (D9100#inline-15067)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45602
diff changeset
114 entry =
be951ca95b08 hg-core: use `.or(Err(Error))` not `.map_err(|_| Error)` (D9100#inline-15067)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45602
diff changeset
115 self.get_entry(base_rev).or(Err(RevlogError::Corrupted))?;
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
116 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
117
45531
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
118 // TODO do not look twice in the index
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
119 let index_entry = self
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
120 .index
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
121 .get_entry(rev)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
122 .ok_or(RevlogError::InvalidRevision)?;
45531
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
123
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
124 let data: Vec<u8> = if delta_chain.is_empty() {
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
125 entry.data()?.into()
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
126 } else {
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
127 Revlog::build_data_from_deltas(entry, &delta_chain)?
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
128 };
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
129
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
130 if self.check_hash(
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
131 index_entry.p1(),
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
132 index_entry.p2(),
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
133 index_entry.hash(),
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
134 &data,
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
135 ) {
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
136 Ok(data)
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
137 } else {
45531
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
138 Err(RevlogError::Corrupted)
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
139 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
140 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
141
45531
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
142 /// Check the hash of some given data against the recorded hash.
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
143 pub fn check_hash(
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
144 &self,
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
145 p1: Revision,
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
146 p2: Revision,
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
147 expected: &[u8],
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
148 data: &[u8],
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
149 ) -> bool {
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
150 let e1 = self.index.get_entry(p1);
45531
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
151 let h1 = match e1 {
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
152 Some(ref entry) => entry.hash(),
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
153 None => &NULL_NODE_ID,
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
154 };
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
155 let e2 = self.index.get_entry(p2);
45531
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
156 let h2 = match e2 {
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
157 Some(ref entry) => entry.hash(),
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
158 None => &NULL_NODE_ID,
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
159 };
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
160
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
161 hash(data, &h1, &h2).as_slice() == expected
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
162 }
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
163
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
164 /// Build the full data of a revision out its snapshot
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
165 /// and its deltas.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
166 #[timed]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
167 fn build_data_from_deltas(
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
168 snapshot: RevlogEntry,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
169 deltas: &[RevlogEntry],
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
170 ) -> Result<Vec<u8>, RevlogError> {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
171 let snapshot = snapshot.data()?;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
172 let deltas = deltas
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
173 .iter()
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
174 .rev()
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
175 .map(RevlogEntry::data)
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
176 .collect::<Result<Vec<Cow<'_, [u8]>>, RevlogError>>()?;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
177 let patches: Vec<_> =
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
178 deltas.iter().map(|d| patch::PatchList::new(d)).collect();
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
179 let patch = patch::fold_patch_lists(&patches);
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
180 Ok(patch.apply(&snapshot))
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
181 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
182
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
183 /// Return the revlog data.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
184 fn data(&self) -> &[u8] {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
185 match self.data_bytes {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
186 Some(ref data_bytes) => &data_bytes,
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
187 None => panic!(
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
188 "forgot to load the data or trying to access inline data"
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
189 ),
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
190 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
191 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
192
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
193 /// Get an entry of the revlog.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
194 fn get_entry(&self, rev: Revision) -> Result<RevlogEntry, RevlogError> {
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
195 let index_entry = self
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
196 .index
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
197 .get_entry(rev)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
198 .ok_or(RevlogError::InvalidRevision)?;
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
199 let start = index_entry.offset();
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
200 let end = start + index_entry.compressed_len();
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
201 let data = if self.index.is_inline() {
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
202 self.index.data(start, end)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
203 } else {
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
204 &self.data()[start..end]
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
205 };
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
206 let entry = RevlogEntry {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
207 rev,
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
208 bytes: data,
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
209 compressed_len: index_entry.compressed_len(),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
210 uncompressed_len: index_entry.uncompressed_len(),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
211 base_rev: if index_entry.base_revision() == rev {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
212 None
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
213 } else {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
214 Some(index_entry.base_revision())
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
215 },
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
216 };
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
217 Ok(entry)
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
218 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
219 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
220
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
221 /// The revlog entry's bytes and the necessary informations to extract
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
222 /// the entry's data.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
223 #[derive(Debug)]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
224 pub struct RevlogEntry<'a> {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
225 rev: Revision,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
226 bytes: &'a [u8],
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
227 compressed_len: usize,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
228 uncompressed_len: usize,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
229 base_rev: Option<Revision>,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
230 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
231
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
232 impl<'a> RevlogEntry<'a> {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
233 /// Extract the data contained in the entry.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
234 pub fn data(&self) -> Result<Cow<'_, [u8]>, RevlogError> {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
235 if self.bytes.is_empty() {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
236 return Ok(Cow::Borrowed(&[]));
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
237 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
238 match self.bytes[0] {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
239 // Revision data is the entirety of the entry, including this
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
240 // header.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
241 b'\0' => Ok(Cow::Borrowed(self.bytes)),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
242 // Raw revision data follows.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
243 b'u' => Ok(Cow::Borrowed(&self.bytes[1..])),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
244 // zlib (RFC 1950) data.
45595
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
245 b'x' => Ok(Cow::Owned(self.uncompressed_zlib_data()?)),
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
246 // zstd data.
45595
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
247 b'\x28' => Ok(Cow::Owned(self.uncompressed_zstd_data()?)),
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
248 format_type => Err(RevlogError::UnknowDataFormat(format_type)),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
249 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
250 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
251
45595
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
252 fn uncompressed_zlib_data(&self) -> Result<Vec<u8>, RevlogError> {
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
253 let mut decoder = ZlibDecoder::new(self.bytes);
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
254 if self.is_delta() {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
255 let mut buf = Vec::with_capacity(self.compressed_len);
45595
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
256 decoder
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
257 .read_to_end(&mut buf)
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
258 .or(Err(RevlogError::Corrupted))?;
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
259 Ok(buf)
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
260 } else {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
261 let mut buf = vec![0; self.uncompressed_len];
45595
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
262 decoder
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
263 .read_exact(&mut buf)
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
264 .or(Err(RevlogError::Corrupted))?;
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
265 Ok(buf)
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
266 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
267 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
268
45595
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
269 fn uncompressed_zstd_data(&self) -> Result<Vec<u8>, RevlogError> {
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
270 if self.is_delta() {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
271 let mut buf = Vec::with_capacity(self.compressed_len);
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
272 zstd::stream::copy_decode(self.bytes, &mut buf)
45595
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
273 .or(Err(RevlogError::Corrupted))?;
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
274 Ok(buf)
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
275 } else {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
276 let mut buf = vec![0; self.uncompressed_len];
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
277 let len = zstd::block::decompress_to_buffer(self.bytes, &mut buf)
45595
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
278 .or(Err(RevlogError::Corrupted))?;
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
279 if len != self.uncompressed_len {
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
280 Err(RevlogError::Corrupted)
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
281 } else {
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
282 Ok(buf)
497657895b54 hg-core: return `Err` on decompression error (D8958#inline-15004 followup)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45536
diff changeset
283 }
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
284 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
285 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
286
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
287 /// Tell if the entry is a snapshot or a delta
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
288 /// (influences on decompression).
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
289 fn is_delta(&self) -> bool {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
290 self.base_rev.is_some()
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
291 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
292 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
293
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
294 /// Format version of the revlog.
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
295 pub fn get_version(index_bytes: &[u8]) -> u16 {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
296 BigEndian::read_u16(&index_bytes[2..=3])
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
297 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
298
45531
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
299 /// Calculate the hash of a revision given its data and its parents.
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
300 fn hash(data: &[u8], p1_hash: &[u8], p2_hash: &[u8]) -> Vec<u8> {
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
301 let mut hasher = Sha1::new();
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
302 let (a, b) = (p1_hash, p2_hash);
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
303 if a > b {
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
304 hasher.input(b);
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
305 hasher.input(a);
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
306 } else {
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
307 hasher.input(a);
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
308 hasher.input(b);
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
309 }
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
310 hasher.input(data);
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
311 let mut hash = vec![0; NODE_BYTES_LENGTH];
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
312 hasher.result(&mut hash);
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
313 hash
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
314 }
b0d6309ff50c hg-core: check data integrity in `Revlog`
Antoine Cezar <antoine.cezar@octobus.net>
parents: 45526
diff changeset
315
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
316 #[cfg(test)]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
317 mod tests {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
318 use super::*;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
319
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
320 use super::super::index::IndexEntryBuilder;
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
321
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
322 #[test]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
323 fn version_test() {
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
324 let bytes = IndexEntryBuilder::new()
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
325 .is_first(true)
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
326 .with_version(1)
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45595
diff changeset
327 .build();
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
328
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
329 assert_eq!(get_version(&bytes), 1)
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
330 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
331 }