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Monorepo for Tangled
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use gix_object::Kind;
/// A trait to model putting objects at a given pack `offset` into a cache, and fetching them.////// It is used to speed up [pack traversals][crate::index::File::traverse()].pub trait DecodeEntry { /// Store a fully decoded object at `offset` of `kind` with `compressed_size` and `data` in the cache. /// /// It is up to the cache implementation whether that actually happens or not. fn put( &mut self, pack_id: u32, offset: u64, data: &[u8], kind: gix_object::Kind, compressed_size: usize, ); /// Attempt to fetch the object at `offset` and store its decoded bytes in `out`, as previously stored with [`DecodeEntry::put()`], and return /// its (object `kind`, `decompressed_size`) fn get( &mut self, pack_id: u32, offset: u64, out: &mut Vec<u8>, ) -> Option<(gix_object::Kind, usize)>;}
/// A cache that stores nothing and retrieves nothing, thus it _never_ caches.#[derive(Default)]pub struct Never;
impl DecodeEntry for Never { fn put( &mut self, _pack_id: u32, _offset: u64, _data: &[u8], _kind: gix_object::Kind, _compressed_size: usize, ) { } fn get( &mut self, _pack_id: u32, _offset: u64, _out: &mut Vec<u8>, ) -> Option<(gix_object::Kind, usize)> { None }}
impl<T: DecodeEntry + ?Sized> DecodeEntry for Box<T> { fn put(&mut self, pack_id: u32, offset: u64, data: &[u8], kind: Kind, compressed_size: usize) { self.deref_mut() .put(pack_id, offset, data, kind, compressed_size); }
fn get(&mut self, pack_id: u32, offset: u64, out: &mut Vec<u8>) -> Option<(Kind, usize)> { self.deref_mut().get(pack_id, offset, out) }}
/// A way of storing and retrieving entire objects to and from a cache.pub trait Object { /// Put the object going by `id` of `kind` with `data` into the cache. fn put(&mut self, id: gix_hash::ObjectId, kind: gix_object::Kind, data: &[u8]);
/// Try to retrieve the object named `id` and place its data into `out` if available and return `Some(kind)` if found. fn get(&mut self, id: &gix_hash::ObjectId, out: &mut Vec<u8>) -> Option<gix_object::Kind>;}
/// Various implementations of [`DecodeEntry`] using least-recently-used algorithms.#[cfg(any(feature = "pack-cache-lru-dynamic", feature = "pack-cache-lru-static"))]pub mod lru;
pub mod object;
///pub mod delta;
/// Replaces content of the given `Vec` with the slice. The vec will have the same length/// as the slice. The vec can be either `&mut Vec` or `Vec`./// Returns `None` if no memory could be allocated.#[cfg(any( feature = "pack-cache-lru-static", feature = "pack-cache-lru-dynamic", feature = "object-cache-dynamic"))]fn set_vec_to_slice<V: std::borrow::BorrowMut<Vec<u8>>>(mut vec: V, source: &[u8]) -> Option<V> { let out = vec.borrow_mut(); out.clear(); out.try_reserve(source.len()).ok()?; out.extend_from_slice(source); Some(vec)}