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WOF_FILE_COMPRESSION_INFO_V1 structure (wofapi.h)

  • Article

Defines metadata specific to files provided by WOF_PROVIDER_FILE.

Syntax

typedef struct _WOF_FILE_COMPRESSION_INFO_V1 {
  ULONG Algorithm;
  ULONG Flags;
} WOF_FILE_COMPRESSION_INFO_V1, *PWOF_FILE_COMPRESSION_INFO_V1;

Members

Algorithm

Specifies the compression algorithm that is used to compress this file. Currently defined algorithms are:

FILE_PROVIDER_COMPRESSION_XPRESS4K Indicates that the data for the file should be compressed in 4kb chunks with the XPress algorithm. This algorithm is designed to be computationally lightweight, and provides for rapid access to data.
FILE_PROVIDER_COMPRESSION_LZX Indicates that the data for the file should be compressed in 32kb chunks with the LZX algorithm. This algorithm is designed to be highly compact, and provides for small footprint for infrequently accessed data.
FILE_PROVIDER_COMPRESSION_XPRESS8K Indicates that the data for the file should be compressed in 8kb chunks with the XPress algorithm.
FILE_PROVIDER_COMPRESSION_XPRESS16K Indicates that the data for the file should be compressed in 16kb chunks with the XPress algorithm.

Flags

Specifies flags for the operation. Reserved for future use, should be 0.

Requirements

Requirement Value
Minimum supported client Windows 10 [desktop apps only]
Minimum supported server Windows Server 2016 [desktop apps only]
Header wofapi.h