Function

compression_stream_init(_:_:_:)

Initializes a compression stream for either compression or decompression.

Declaration

func compression_stream_init(_ stream: UnsafeMutablePointer<compression_stream>, _ operation: compression_stream_operation, _ algorithm: compression_algorithm) -> compression_status

Parameters

stream

Pointer to an allocated compression_stream structure.

operation

A constant of type compression_stream_operation used to indicate the stream operation.

algorithm

Return Value

A value of type compression_status, interpreted as follows:

Discussion

After success of this function, set the dst_ptr, dst_size, src_ptr, and src_size fields of the stream structure to their respective values. You can then pass stream structure to the compression_stream_process(_:_:) function.

See Also

Multiple-Step Compression

Compressing and Decompressing Files with Stream Compression

Perform compression or the appropriate kind of decompression to a file based on its path extension.

struct compression_stream

A structure representing a compression stream.

func compression_stream_process(UnsafeMutablePointer<compression_stream>, Int32) -> compression_status

Performs compression or decompression using an initialized compression stream structure.

struct compression_status

A set of values used to represent the status of stream compression.

struct compression_stream_flags

A set of values used to represent stream compression flags.

struct compression_stream_operation

A set of values used to represent a stream compression operation.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software