/// <summary>Initializes a new instance of the FNV class.</summary>
/// <param name="parameters">The parameters to utilize in the FNV calculation.</param>
/// <exception cref="ArgumentNullException">When the specified parameters are null.</exception>
public Fnv(FnvParameters parameters) : base()
{
lock (syncLock) {
if (parameters == null)
{
throw new ArgumentNullException("parameters", Hasher.Properties.Resources.paramCantBeNull);
}
this.parameters = parameters;
HashSizeValue = this.parameters.Order;
hash = (ulong)this.parameters.OffsetBasis;
}
}
/// <summary>Retrieves a standard set of FNV parameters.</summary>
/// <param name="standard">The name of the standard parameter set to retrieve.</param>
/// <returns>The FNV Parameters for the given standard.</returns>
public static FnvParameters GetParameters(FnvStandard standard)
{
FnvParameters temp = null;
switch (standard)
{
case FnvStandard.Fnv32BitType0: temp = new FnvParameters(32, 0x01000193, 0x00000000, FnvAlgorithmType.Fnv1); break;
case FnvStandard.Fnv64BitType0: temp = new FnvParameters(64, 0x0100000001B3, 0x00000000, FnvAlgorithmType.Fnv1); break;
case FnvStandard.Fnv32BitType1: temp = new FnvParameters(32, 0x01000193, 0x811C9DC5, FnvAlgorithmType.Fnv1); break;
case FnvStandard.Fnv64BitType1: temp = new FnvParameters(64, 0x0100000001B3, unchecked ((long)0xCBF29CE484222325), FnvAlgorithmType.Fnv1); break;
case FnvStandard.Fnv32BitType1A: temp = new FnvParameters(32, 0x01000193, 0x811C9DC5, FnvAlgorithmType.Fnv1A); break;
case FnvStandard.Fnv64BitType1A: temp = new FnvParameters(64, 0x0100000001B3, unchecked ((long)0xCBF29CE484222325), FnvAlgorithmType.Fnv1A); break;
}
return(temp);
}
/// <summary>Initializes a new instance of the FNV class.</summary>
/// <remarks>This constructor implements the default parameters of Fnv32BitType1A.</remarks>
public Fnv() : this(FnvParameters.GetParameters(FnvStandard.Fnv32BitType1A))
{
}