/// <summary>
/// Initializes a new instance of the <see cref="GenericGFPoly"/> class.
/// </summary>
/// <param name="field">the {@link GenericGF} instance representing the field to use
/// to perform computations</param>
/// <param name="coefficients">coefficients as ints representing elements of GF(size), arranged
/// from most significant (highest-power term) coefficient to least significant</param>
/// <exception cref="ArgumentException">if argument is null or empty,
/// or if leading coefficient is 0 and this is not a
/// constant polynomial (that is, it is not the monomial "0")</exception>
internal GenericGFPoly(GenericGF field, int[] coefficients)
{
if (coefficients.Length == 0)
{
throw new ArgumentException();
}
this.field = field;
int coefficientsLength = coefficients.Length;
if (coefficientsLength > 1 && coefficients[0] == 0)
{
// Leading term must be non-zero for anything except the constant polynomial "0"
int firstNonZero = 1;
while (firstNonZero < coefficientsLength && coefficients[firstNonZero] == 0)
{
firstNonZero++;
}
if (firstNonZero == coefficientsLength)
{
this.coefficients = new int[] { 0 };
}
else
{
this.coefficients = new int[coefficientsLength - firstNonZero];
Array.Copy(coefficients,
firstNonZero,
this.coefficients,
0,
this.coefficients.Length);
}
}
else
{
this.coefficients = coefficients;
}
}
public SimpleRSDecoder(GenericGF field)
{
_field = field;
_cachedGenerators = new List<GenericGFPoly> { new GenericGFPoly(field, new int[] {1}) };
}