/// <summary>Initializes a new instance of the Fletcher class.</summary>
/// <param name="parameters">The parameters to utilize in the Fletcher calculation.</param>
/// <exception cref="ArgumentNullException">When the specified parameters are null.</exception>
public Fletcher(FletcherParameters parameters) : base()
{
lock (syncLock) {
if (parameters == null)
{
throw new ArgumentNullException("parameters", Properties.Resources.paramCantBeNull);
}
this.parameters = parameters;
HashSizeValue = this.parameters.Order;
modulo = (uint)(Math.Pow(2, (this.parameters.Order / 2)) - 1);
}
}
/// <summary>Retrieves a standard set of Fletcher parameters.</summary>
/// <param name="standard">The name of the standard parameter set to retrieve.</param>
/// <returns>The Fletcher Parameters for the given standard.</returns>
public static FletcherParameters GetParameters(FletcherStandard standard)
{
FletcherParameters temp = null;
switch (standard)
{
case FletcherStandard.Fletcher8Bit: temp = new FletcherParameters(8); break;
case FletcherStandard.Fletcher16Bit: temp = new FletcherParameters(16); break;
case FletcherStandard.Fletcher32Bit: temp = new FletcherParameters(32); break;
}
return(temp);
}
/// <summary>Initializes a new instance of the Fletcher class.</summary>
/// <remarks>This constructor implements the default parameters of Fletcher32Bit.</remarks>
public Fletcher() : this(FletcherParameters.GetParameters(FletcherStandard.Fletcher32Bit))
{
}