SDK

There is one class that is used to calculate checksums. The class is declared as follow:

public class CRC : System.Object

Enumerations:

CRC.CRCalgorithm - has values that are used to initialize an instance of the class (pass through the constructor or the Init function). For details look here.

Properties:

• crc

  (read only)
  public uint crc

  The property returns the value of the calculated checksum.

Methods:

• Constructor 1

  public CRC ( CRC.CRCalgorithm a )

  Parameters:

  a

  [in] - A member of CRC.CRCalgorithm enumeration (except CRC_custom). The value is used to initialize the instance of the class like Init function.

• Constructor 2

  public CRC ()

  Internally initializes with the CRC.CRCalgorithm.CRC32 value

• Init

  public void Init ( CRC.CRCalgorithm a )

  Parameters:

  a

  [in] - The function is used to initialize an existing instance of class. Can be called more than once.

• InitCustom

  public void InitCustom ( int variant, int width, uint poly, bool reflectIn, bool reflectOut, uint xoroutMask, uint InitValue )

  Parameters:

  variant

  [in] - Variant of calculations. Can be 1 or 2.

  width

  [in] - It is the width of the polynom.

  poly

  [in] - The polynom's family ( i.e. 0x1021 for CCITT, for example).

  reflectIn

  [in] - The flag is used to point that all input sequence will be reflected becore processing.

  reflectOut

  [in] - The flag is used to point that the result of calculations will be reflected before it returns.

  xoroutMask

  [in] - An unsigned number that is XOR'ed with the result before it returns.

  InitValue

  [in] - It is the initial value of the custom algorithm.

• crcNext

  public void crcNext ( System.Byte ch )

  Parameters:

  ch

  [in] - The function is used to count passed bytech into the checksum.

• GetFileCrc

  public System.UInt32 GetFileCrc ( System.String FileName )

  Parameters:

  FileName

  [in] - The name of a file which checksum will be calculated.

• GetStreamCrc

  public System.UInt32 GetStreamCrc ( System.IO.BinaryReader binaryReader )

  Parameters:

  binaryReader

  [in] - A pointer to an instance of BinaryReader that will give bytes for the checksum calculation.

• GetStreamCrc

  public System.UInt32 GetStreamCrc ( System.IO.Stream stream )

  Parameters:

  stream

  [in] - A pointer to an instance of System.IO.Stream that will give bytes for the checksum calculation.