Move ZSTD_loadDictionaryContent orchestration into a Rust-owned policy leaf while keeping C-private match-state, LDM, workspace, window, overflow, and matchfinder operations behind narrow callbacks. Preserve both dictionary suffix limits, LDM-before-main-table ordering, dictionary validity publication, strategy-specific loading, and final nextToUpdate publication without changing ZSTD_compress_insertDictionary dispatch semantics.
Add focused policy tests for the two suffix limits and matchfinder path selection. Preserve the existing global overflow helper as a C callback boundary.
Test Plan:
- rustfmt --check rust/src/zstd_compress_dictionary.rs
- git diff --check and git diff --cached --check
- Static diff/rg inspection of the Rust/C ABI, callback order, suffix truncation, and private-state ownership
- No cargo, make, native, fuzz, or heavy tests run by request
ddidderr
0ea4a1b6c3