sharp-biginteger/IntField.cs

using System;
using System.Linq.Expressions;
namespace BigInt
{
	public class IntField
	{
		public static IntField Default { get; set; } = null; // new IntField(UBigInteger.ZERO.Resize(256) - 1);
		public static IntField INFINITY { get; private set; } = new IntField();

		public Integer FieldModulo { get; private set; }

		public IntField(UInteger p){
			this.FieldModulo = p;
		}
		public IntField(Integer p){
			this.FieldModulo = p;
		}

		private IntField(){
			this.FieldModulo = 0;
		}

		public Integer Fit(Integer value)
		{
			if (FieldModulo.isZero()){
				return value;
			}

			value %= FieldModulo;
			if (value.Sign())
			{
				value += FieldModulo;
			}
			return value;
		}
		public UInteger Fit(UInteger value)
		{
			if (FieldModulo.isZero()){
				return value;
			}

			value %= (UInteger)FieldModulo;
			return value;
		}

		public Integer AdditiveInverse(Integer value){
			return FieldModulo - value;
		}

		public override string ToString(){
			return String.Format("[IntField p={0}]",this.FieldModulo);
		}

	}
}