alice.pds.demo.boltless.dev
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1use gix_features::zlib;
2
3impl crate::Bundle {
4 /// Find an object with the given [`ObjectId`](gix_hash::ObjectId) and place its data into `out`.
5 /// `inflate` is used to decompress objects, and will be reset before first use, but not after the last use.
6 ///
7 /// [`cache`](crate::cache::DecodeEntry) is used to accelerate the lookup.
8 ///
9 /// **Note** that ref deltas are automatically resolved within this pack only, which makes this implementation unusable
10 /// for thin packs, which by now are expected to be resolved already.
11 pub fn find<'a>(
12 &self,
13 id: &gix_hash::oid,
14 out: &'a mut Vec<u8>,
15 inflate: &mut zlib::Inflate,
16 cache: &mut dyn crate::cache::DecodeEntry,
17 ) -> Result<
18 Option<(gix_object::Data<'a>, crate::data::entry::Location)>,
19 crate::data::decode::Error,
20 > {
21 let idx = match self.index.lookup(id) {
22 Some(idx) => idx,
23 None => return Ok(None),
24 };
25 self.get_object_by_index(idx, out, inflate, cache).map(Some)
26 }
27
28 /// Special-use function to get an object given an index previously returned from
29 /// [index::File::](crate::index::File::lookup()).
30 /// `inflate` is used to decompress objects, and will be reset before first use, but not after the last use.
31 ///
32 /// # Panics
33 ///
34 /// If `index` is out of bounds.
35 pub fn get_object_by_index<'a>(
36 &self,
37 idx: u32,
38 out: &'a mut Vec<u8>,
39 inflate: &mut zlib::Inflate,
40 cache: &mut dyn crate::cache::DecodeEntry,
41 ) -> Result<(gix_object::Data<'a>, crate::data::entry::Location), crate::data::decode::Error>
42 {
43 let ofs = self.index.pack_offset_at_index(idx);
44 let pack_entry = self.pack.entry(ofs)?;
45 let header_size = pack_entry.header_size();
46 self.pack
47 .decode_entry(
48 pack_entry,
49 out,
50 inflate,
51 &|id, _out| {
52 let idx = self.index.lookup(id)?;
53 self.pack
54 .entry(self.index.pack_offset_at_index(idx))
55 .ok()
56 .map(crate::data::decode::entry::ResolvedBase::InPack)
57 },
58 cache,
59 )
60 .map(move |r| {
61 (
62 gix_object::Data {
63 kind: r.kind,
64 data: out.as_slice(),
65 object_hash: self.pack.object_hash(),
66 },
67 crate::data::entry::Location {
68 pack_id: self.pack.id,
69 pack_offset: ofs,
70 entry_size: r.compressed_size + header_size,
71 },
72 )
73 })
74 }
75}