Keep the one-shot Rust frame path on the same ordinary block-emission contract as the C compressor: preserve the initial window index and matcher history across blocks, use direct sequence-store entropy coding, promote non-first RLE blocks, and emit raw blocks below the C compressibility cutoff. Route unsupported strategies through the existing C stateful fallback so all public compression levels retain their expected behavior.
Test Plan:
- cargo test --manifest-path rust/Cargo.toml --no-default-features --features compression zstd_compress::tests
- cargo clippy --manifest-path rust/Cargo.toml --no-default-features --features compression --lib -- -D warnings
- ./tests/fuzzer -s9634 -v
- git diff --cached --check
ddidderr
09ea3e6334