* Support Python 3.15 zlib checksum combination and version deprecation
Forward checksum combination to the existing zlib-rs backend, retaining CPython checksum masking, conversion warnings, and signed length bounds. Deprecate __version__ through module __getattr__. Sync the canonical test_zlib with scripts/update_lib.
Implementation and source review assisted by OpenAI Codex; focused compilation and Clippy passed. Canonical runtime tests remain pending.
Assisted-by: OpenAI Codex: model version unavailable
* Fix zlib combine ABI conversions for cross-platform Clippy
Mark checksum results must-use and make the C unsigned-long and length conversions explicit per ABI. Preserve Windows GNU's 32-bit z_off64_t and large-file length handling without lint suppression.
OpenAI Codex assisted with implementation and source review. Standalone common-crate Clippy passed; Windows validation remains with CI.
Assisted-by: OpenAI Codex: model version unavailable
---------
Co-authored-by: Codex <codex@openai.com>
* common: share the zlib stream engine
Move the VM-independent zlib-rs stream owner and state machine into a feature-gated rustpython-common module. Make rustpython-stdlib adapt that engine instead of carrying its own flate2 implementation, including native stream copy/deepcopy, Z_BLOCK flushes, and wbits=0 decompression.
Assisted-by: Codex:GPT-5
* common: share the lzma stream engine
Move the VM-independent liblzma stream owner, filter properties, and compression state into a target-gated rustpython-common module. Keep rustpython-stdlib as the Python object and exception adapter, and remove its direct xz dependencies and lzma-only generic compressor machinery.
Assisted-by: Codex:GPT-5
* common: address compression engine reviews
- add a special_retrieve fudge function to the PyValue trait
- define the special_retrieve function for PyInt
- remove blocks on successful tests to reflect effect of changes
