Difference between revisions of "Unit NTFSUtils"
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! '''Note''' | ! '''Note''' | ||
| − | | Compress block will detect an uncompressable block as the final length after compression will be greater than 4096 in length. If compress block reaches the end of the dest buffer then it | + | | Compress block will detect an uncompressable block as the final length after compression will be greater than 4096 in length. If compress block reaches the end of the dest buffer then it will fail the compress block and compress unit and the whole unit will be considered as uncompressable. If the data available for the block is less then 4096 then it may grow after compression but will not be marked as uncompressed unless it exceeds 4096 bytes. |
| − | will fail the compress block and compress unit and the whole unit will be considered as uncompressable. If the data available for the block is less then 4096 then it may grow after compression but will not be marked as uncompressed unless it exceeds 4096 bytes. | + | |
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! '''Note''' | ! '''Note''' | ||
| − | | Compress block will detect an uncompressable block as the final length after compression will be greater than 4096 in length. If compress block reaches the end of the dest buffer then it | + | | Compress block will detect an uncompressable block as the final length after compression will be greater than 4096 in length. If compress block reaches the end of the dest buffer then it will fail the compress block and compress unit and the whole unit will be considered as uncompressable. If the data available for the block is less then 4096 then it may grow after compression but will not be marked as uncompressed unless it exceeds 4096 bytes. |
| − | will fail the compress block and compress unit and the whole unit will be considered as uncompressable. If the data available for the block is less then 4096 then it may grow after compression but will not be marked as uncompressed unless it exceeds 4096 bytes. | + | |
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|} | |} | ||
Revision as of 03:02, 20 October 2016
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Contents
[hide]Description
To be documented
Constants
To be documented
Type definitions
To be documented
Public variables
To be documented
Function declarations
NTFS support functions
NTFS compression functions
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function NTFSGetUnitUsed(ABuffer:Pointer; ASize,AShift:LongWord):LongWord;
Description: Get the actual size consumed by the compressed data in the unit
[Expand]
function NTFSCompressUnit(ASource,ADest:Pointer; ASize,AShift,AStart,ACount,ATotal:LongWord):Boolean;
Description: Compress a unit of data from source to dest buffers
[Expand]
function NTFSDecompressUnit(ASource,ADest:Pointer; ASize,AShift,AStart,ACount,ATotal:LongWord):Boolean;
Description: Decompress a unit (or partial unit) of data from source to dest buffers
[Expand]
function NTFSGetBlockShift(ASize:LongWord):LongWord;
Description: Get the shift count for cluster to 4k block conversion
[Expand]
function NTFSCompressBlock(ASource,ADest:Pointer; ASize,ATotal:LongWord):Boolean;
Description: Compress a 4k block of data from source to dest buffers
[Expand]
function NTFSDecompressBlock(ASource,ADest:Pointer; ASize:LongWord):Boolean;
Description: Decompress a 4k block of data from source to dest buffers
[Expand]
function NTFSGetTagShiftMask(AOffset:LongWord; var AMask,AShift:Word):Boolean;
Description: Get the Mask bits and Shift count for Tag encode and decode based on the offset
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