SystemEx.Hash.Hashable Class Reference

Public Member Functions
FixedVector< byte >	ToBytes ()
	Converts the object into a byte array representation used by hashers. Implementations must return a deterministic and stable encoding.
override int	GetHashCode ()
	Computes a 32‑bit hash using the algorithm specified by HashAlgorithmAttribute on the concrete type.
virtual long	GetHashCodeLong ()
	Computes a 64‑bit hash using the algorithm specified by HashAlgorithmAttribute on the concrete type.

Properties
ulong	Seed [get]
	Gets the random seed assigned to this instance.

Member Function Documentation

GetHashCode()

override int SystemEx.Hash.Hashable.GetHashCode

(

)

Computes a 32‑bit hash using the algorithm specified by HashAlgorithmAttribute on the concrete type.

If no attribute is present, base.GetHashCode() is used. The hasher instance is created transiently via reflection.

                                           {
            int _hash = 0;
 
            // Attribut vom konkreten Typ lesen (nicht typeof(Hashable ))
            var attr = (HashAlgorithmAttribute?)Attribute.GetCustomAttribute(this.GetType(), typeof(HashAlgorithmAttribute));
            if ( attr == null ) {
                _hash = base.GetHashCode();
            } else {
                // Bytes erzeugen
                FixedVector<byte> input = ToBytes();
 
                // Hasher transient erzeugen: zuerst versuchen, Konstruktor mit Endian, sonst parameterlos
                object? inst = null;
                try {
                    inst = Activator.CreateInstance(attr.HasherType, attr.Endian);
                } catch {
                    try {
                        inst = Activator.CreateInstance(attr.HasherType);
                    } catch {
                        inst = null;
                    }
                }
 
                if ( inst is IHash hasher ) {
                    var h = hasher.Compute(input, (uint)m_seed );
                    _hash = (int)h.Value;
                } else {
                    _hash = base.GetHashCode();
                }
            }
 
            return _hash;
        }

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GetHashCodeLong()

virtual long SystemEx.Hash.Hashable.GetHashCodeLong ( )

virtual

Computes a 64‑bit hash using the algorithm specified by HashAlgorithmAttribute on the concrete type.

If no attribute is present, base.GetHashCode() is used. The hasher instance is created transiently via reflection.

                                               {
            long _hash = 0;
 
            // Attribut vom konkreten Typ lesen (nicht typeof(Hashable ))
            var attr = (HashAlgorithmAttribute?)Attribute.GetCustomAttribute(this.GetType(), typeof(HashAlgorithmAttribute));
            if ( attr == null ) {
                _hash = base.GetHashCode();
            } else {
                // Bytes erzeugen
                FixedVector<byte> input = ToBytes();
 
                // Hasher transient erzeugen: zuerst versuchen, Konstruktor mit Endian, sonst parameterlos
                object? inst = null;
                try {
                    inst = Activator.CreateInstance(attr.HasherType, attr.Endian);
                } catch {
                    try {
                        inst = Activator.CreateInstance(attr.HasherType);
                    } catch {
                        inst = null;
                    }
                }
 
                if ( inst is IHash hasher ) {
                    var h = hasher.ComputeLong(input, m_seed );
                    _hash = (long)h.Value;
                } else {
                    _hash = base.GetHashCode();
                }
            }
 
            return _hash;
        }

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ToBytes()

FixedVector< byte > SystemEx.Hash.Hashable.ToBytes ( )

abstract

Converts the object into a byte array representation used by hashers. Implementations must return a deterministic and stable encoding.

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Property Documentation

Seed

ulong SystemEx.Hash.Hashable.Seed

get

Gets the random seed assigned to this instance.

{ get => m_seed;  }

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

• Hashable.cs