Build: Bump zstandard from 0.18.0 to 0.19.0 in /python

[dependabot]

Bumps zstandard from 0.18.0 to 0.19.0.

Release notes

Sourced from zstandard's releases.

0.19.0

Bug Fixes

• The C backend implementation of ZstdDecompressionObj.decompress() could have raised an assertion in cases where the function was called multiple times on an instance. In non-debug builds, calls to this method could have leaked memory.

Changes

• PyPy 3.6 support dropped; Pypy 3.8 and 3.9 support added.
• Anaconda 3.6 support dropped.
• Official support for Python 3.11. This did not require meaningful code changes and previous release(s) likely worked with 3.11 without any changes.
• CFFI's build system now respects distutils's compiler.preprocessor if it is set. (#179)
• The internal logic of ZstdDecompressionObj.decompress() was refactored. This may have fixed unconfirmed issues where unused_data was set prematurely. The new logic will also avoid an extra call to ZSTD_decompressStream() in some scenarios, possibly improving performance.
• ZstdDecompressor.decompress() how has a read_across_frames keyword argument. It defaults to False. True is not yet implemented and will raise an exception if used. The new argument will default to True in a future release and is provided now so callers can start passing read_across_frames=False to preserve the existing functionality during a future upgrade.
• ZstdDecompressor.decompress() now has an allow_extra_data keyword argument to control whether an exception is raised if input contains extra data. It defaults to True, preserving existing behavior of ignoring extra data. It will likely default to False in a future release. Callers desiring the current behavior are encouraged to explicitly pass allow_extra_data=True so behavior won't change during a future upgrade.

Changelog

Sourced from zstandard's changelog.

0.19.0 (released 2022-10-29)

Bug Fixes

• The C backend implementation of ZstdDecompressionObj.decompress() could have raised an assertion in cases where the function was called multiple times on an instance. In non-debug builds, calls to this method could have leaked memory.

Changes

• PyPy 3.6 support dropped; Pypy 3.8 and 3.9 support added.
• Anaconda 3.6 support dropped.
• Official support for Python 3.11. This did not require meaningful code changes and previous release(s) likely worked with 3.11 without any changes.
• CFFI's build system now respects distutils's compiler.preprocessor if it is set. (#179)
• The internal logic of ZstdDecompressionObj.decompress() was refactored. This may have fixed unconfirmed issues where unused_data was set prematurely. The new logic will also avoid an extra call to ZSTD_decompressStream() in some scenarios, possibly improving performance.
• ZstdDecompressor.decompress() how has a read_across_frames keyword argument. It defaults to False. True is not yet implemented and will raise an exception if used. The new argument will default to True in a future release and is provided now so callers can start passing read_across_frames=False to preserve the existing functionality during a future upgrade.
• ZstdDecompressor.decompress() now has an allow_extra_data keyword argument to control whether an exception is raised if input contains extra data. It defaults to True, preserving existing behavior of ignoring extra data. It will likely default to False in a future release. Callers desiring the current behavior are encouraged to explicitly pass allow_extra_data=True so behavior won't change during a future upgrade.

Commits

• 80c3142 global: change release to 0.19.0
• 81f683e decompressor: add read_across_frames and allow_extra_data arguments to decomp...
• c7a314e tests: add decompress() tests for multiple frames and extra data
• e86740d docs: accurately document ZstdDecompressor.decompress()
• cdf9c92 docs: better document negative compression levels
• e84be46 docs: better call out temporally overlapping usage is not allowed
• f9103dd tests: add test for calling decompress multiple times
• a1deff5 decompressionobj: refactor decompress()
• 30bf0bf black: reformat using black 22.10.0
• 41f7139 cffi: Use the distutils preprocessor when available
• Additional commits viewable in compare view

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[dependabot]

Superseded by #27.