Move the hidden fullbench block-decoder entrypoints and the public
ZSTD_decompressBlock compatibility wrapper into Rust. The C translation unit
now only projects the configuration-dependent private DCtx fields into the
Rust block context, preserving the existing ABI and decoder feature modes.
Test Plan:
- cargo test --manifest-path rust/Cargo.toml --all-targets -- --test-threads=1
- cargo clippy --manifest-path rust/Cargo.toml --tests -- -D warnings
- make -B -C lib -j2 lib
- make -B -C tests -j2 test-rust-lib-smoke
- make -B -C tests -j2 test-cli-tests
Port sequence-decoder selection and offset-history policy into Rust. The
Rust block decoder now handles short/long selection, offset-table analysis,
history thresholds, and prefetch sequencing; C projects only the decoder mode
and private context fields required by the ABI.
Test Plan:
- cargo test --manifest-path rust/Cargo.toml --all-targets -- --test-threads=1
- cargo clippy --manifest-path rust/Cargo.toml --all-targets -- -D warnings
- make -B -C lib -j2 lib ZSTD_FORCE_DECOMPRESS_SEQUENCES_SHORT=1 ZSTD_FORCE_DECOMPRESS_SEQUENCES_LONG=0
- make -B -C lib -j2 lib ZSTD_FORCE_DECOMPRESS_SEQUENCES_SHORT=0 ZSTD_FORCE_DECOMPRESS_SEQUENCES_LONG=1
- make -B -C tests -j2 test-zstd
Move literal decoding, sequence-table construction, FSE sequence decoding, and
sequence execution into Rust. The C shim retains ownership of the configured
decoder context and passes only the leaf state needed by the block codec.
Correct the two high offset-code bases while porting the tables. Their prior
values made valid large-window streams decode as corrupted data; the new unit
test fixes the exact values and a native zstream regression exercises them.
High-level frame and streaming context control remains C for now.
Test Plan:
- cargo test --all-targets
- cargo test --target i686-unknown-linux-gnu --all-targets
- cargo clippy && cargo clippy --benches && cargo clippy --tests
- cargo +nightly fmt
- make -B -C tests -j2 fuzzer zstreamtest invalidDictionaries poolTests
- ./tests/fuzzer -s5346 -i1 --no-big-tests
- ./tests/zstreamtest -i3000 -s334462
- ./tests/invalidDictionaries
- timeout 20s stdbuf -oL ./tests/poolTests
Refs: rust/README.md
ddidderr