SystemEx.Hash.FletcherHash Class Reference

Inheritance diagram for SystemEx.Hash.FletcherHash:

Collaboration diagram for SystemEx.Hash.FletcherHash:

Public Member Functions
	FletcherHash (Endian endian)
	Craate a new instance.
Hash32	Compute (FixedVector< byte > input, uint seed)
	Computes the Fletcher hash of the given input.
Hash64	ComputeLong (FixedVector< byte > input, ulong seed)
	Computes the Fletcher hash of the given input.

Constructor & Destructor Documentation

FletcherHash()

SystemEx.Hash.FletcherHash.FletcherHash

(

Endian

endian

)

Craate a new instance.

Parameters

endian

The suing endian for creating a hash

                                              {
            m_endian = endian;
        }

Member Function Documentation

Compute()

Hash32 SystemEx.Hash.FletcherHash.Compute	(	FixedVector< byte >	input,
		uint	seed )

Computes the Fletcher hash of the given input.

Parameters

input	The input data to hash.
seed	The seed value for the hash computation.

Returns

The computed Fletcher hash as a Hash32 object.

Implements SystemEx.Hash.IHash.

                                                                     {
            uint sum1 = 0xffff;
            uint sum2 = 0xffff;
 
            int index = 0;
            int length = (int) input.Count;
 
            while ( length > 0 ) {
                int tlen = (length > 360 ? 360 : length);
                length -= tlen;
 
                for ( int i = 0 ; i < tlen ; i++ ) {
                    sum1 = (sum1 + input[index++]) % 0xffff;
                    sum2 = (sum2 + sum1) % 0xffff;
                }
            }
 
            uint result = (sum2 << 16) | sum1;
            return new Hash32(result);
        }

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ComputeLong()

Hash64 SystemEx.Hash.FletcherHash.ComputeLong	(	FixedVector< byte >	input,
		ulong	seed )

Computes the Fletcher hash of the given input.

Parameters

input	The input data to hash.
seed	The seed value for the hash computation.

Returns

The computed Fletcher hash as a Hash64 object.

Implements SystemEx.Hash.IHash.

                                                                          {
            // 64‑Bit Wrapper, da du nur die 32‑Bit‑Variante brauchst
            var h32 = Compute(input, (uint)seed );
            return new Hash64(h32.Value);
        }

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The documentation for this class was generated from the following file:

• FletcherHash.cs