feat(rust): port compression literal blocks

Move raw, RLE, and Huffman literal-section encoding into the Rust
compatibility archive.  The surrounding C block compressor continues to pass
its existing entropy workspace and Huffman-table state through the unchanged
internal ABI.

The port preserves literal header choices, compression-gain decisions,
repeat-table transitions, and 1X/4X encoder selection.  It lets ordinary C
compression paths exercise Rust code without widening this commit into the
remaining frame compressor.

Test Plan:
- cargo clippy, cargo clippy --benches, cargo clippy --tests, and nightly fmt
- cargo test --all-targets (94 passed) and feature-only cargo checks
- native fuzzer, zstreamtest, invalidDictionaries, and CLI round trip
- compare literals and next-table bytes with pristine C on x86_64 and i686

Refs: rust/README.md compression-primitives map

This commit is contained in:

ddidderr

2026-07-10 22:07:27 +02:00

parent 079124511b

commit 6a762660b7

4 changed files with 546 additions and 224 deletions

									
										rust/src/lib.rs
									
		+2
		
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				@@ -21,6 +21,8 @@ pub mod pool;

				pub mod threading;

				pub mod xxhash;

				pub mod zstd_common;

				#[cfg(feature = "compression")]

				pub mod zstd_compress_literals;

				#[cfg(feature = "decompression")]

				pub mod zstd_ddict;

				#[cfg(feature = "compression")]