InputFilter, OutputFilter overlay for the Darwin Compression stream API #21939
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…PI, and corresponding test
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moiseev
reviewed
Jan 17, 2019
bob-wilson
approved these changes
Jan 17, 2019
Co-Authored-By: ebainville <ebainville@apple.com>
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Adds Swift overlay for the Darwin Compression stream API.
Defines enums to encapsulate the C constants and errors:
enum Algorithm { lzfse, zlib, lz4, lzma }
enum FilterOperation { compres decompress }
enum FilterError : Error { FilterInitError FilterProcessError WriteToFinalizedFilter ReadCountInvalid }
Two classes encapsulating compression_stream:
class OutputFilter, where we write input data to the filter, and the compressed/decompressed output is sent to a closure
class InputFilter, where we read compressed/decompressed data from the filter, and the input is received from a closure
Added the corresponding test in test/stdlib.