C# Class SharpGIS.ZLib.CRC32

Calculates a 32bit Cyclic Redundancy Checksum (CRC) using the same polynomial used by Zip. This type is used internally by DotNetZip; it is generally not used directly by applications wishing to create, read, or manipulate zip archive files.

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Public Methods

Method	Description
ComputeCrc32 ( Int32 W, byte B ) : Int32	Get the CRC32 for the given (word,byte) combo. This is a computation defined by PKzip.
GetCrc32 ( System input ) : Int32	Returns the CRC32 for the specified stream.
GetCrc32AndCopy ( System input, System output ) : Int32	Returns the CRC32 for the specified stream, and writes the input into the output stream.
SlurpBlock ( byte block, int offset, int count ) : void	Update the value for the running CRC32 using the given block of bytes. This is useful when using the CRC32() class in a Stream.

Private Methods

Method	Description
CRC32 ( ) : System
_InternalComputeCrc32 ( UInt32 W, byte B ) : Int32

Method Details

ComputeCrc32() public method

Get the CRC32 for the given (word,byte) combo. This is a computation defined by PKzip.

public ComputeCrc32 ( Int32 W, byte B ) : Int32
W	System.Int32	The word to start with.
B	byte	The byte to combine it with.
return	System.Int32

GetCrc32() public method

Returns the CRC32 for the specified stream.

public GetCrc32 ( System input ) : Int32
input	System	The stream over which to calculate the CRC32
return	System.Int32

GetCrc32AndCopy() public method

Returns the CRC32 for the specified stream, and writes the input into the output stream.

public GetCrc32AndCopy ( System input, System output ) : Int32
input	System	The stream over which to calculate the CRC32
output	System	The stream into which to deflate the input
return	System.Int32

SlurpBlock() public method

Update the value for the running CRC32 using the given block of bytes. This is useful when using the CRC32() class in a Stream.

public SlurpBlock ( byte block, int offset, int count ) : void
block	byte	block of bytes to slurp
offset	int	starting point in the block
count	int	how many bytes within the block to slurp
return	void