feat(rust): port fast block matching

Move fast hash-table filling and no-dictionary, external-dictionary, and
attached-CDict match loops into Rust. The C shim keeps `ZSTD_MatchState_t`
opaque, extracts only its needed fields, and asserts the mirrored SeqStore
leaf layout so existing compression dispatch remains ABI-compatible.

Test Plan:
- cargo clippy
- cargo clippy --benches
- cargo clippy --tests
- cargo +nightly fmt
- cargo test zstd_fast::tests -- --nocapture
- cargo test --target i686-unknown-linux-gnu zstd_fast::tests -- --nocapture
- byte-identical C-control frames for dictionary and streaming variants
- fuzzer -s2066 -i5 --no-big-tests
- invalidDictionaries and zstreamtest -i1

Refs: Rust superblock port fde1d70c

This commit is contained in:

ddidderr

2026-07-10 22:46:15 +02:00

parent fde1d70cc5

commit 74140c318f

3 changed files with 1657 additions and 946 deletions

									
										rust/src/lib.rs
									
		+2
		
												View File
												
				@@ -30,4 +30,6 @@ pub mod zstd_compress_superblock;

				#[cfg(feature = "decompression")]

				pub mod zstd_ddict;

				#[cfg(feature = "compression")]

				pub mod zstd_fast;

				#[cfg(feature = "compression")]

				pub mod zstd_presplit;