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RtlGetCompressionWorkSpaceSize.md

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Function name : RtlGetCompressionWorkSpaceSize

Group: Data Decompression Library - Library: ntdll

This function is used to determine the correct size of the WorkSpace buffer for the RtlCompressBuffer and RtlDecompressFragment functions.

Code examples:

Compressing and decompressing files with Windows API Runtime Library routines

Declaration:

NTSTATUS RtlGetCompressionWorkSpaceSize(
  __in   USHORT CompressionFormatAndEngine,
  __out  PULONG CompressBufferWorkSpaceSize,
  __out  PULONG CompressFragmentWorkSpaceSize
);

FoxPro declaration:

DECLARE INTEGER RtlGetCompressionWorkSpaceSize IN ntdll;
	SHORT CompressionFormatAndEngine,;
	LONG @CompressBufferWorkSpaceSize,;
	LONG @CompressFragmentWorkSpaceSize

Parameters:

CompressionFormatAndEngine [in] Bitmask specifying the compression format and engine type.

CompressBufferWorkSpaceSize [out] A pointer to a caller-allocated buffer receiving the size, in bytes, required to compress a buffer.

CompressFragmentWorkSpaceSize [out] A pointer to a caller-allocated buffer receiving the size, in bytes, required to decompress a compressed buffer to a fragment.

Return value:

Returns STATUS_SUCCESS (0) or an appropriate error code.