-\feffusing System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+\feff/**
+* Novacoin classes library
+* Copyright (C) 2015 Alex D. (balthazar.ad@gmail.com)
+
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU Affero General Public License as
+* published by the Free Software Foundation, either version 3 of the
+* License, or (at your option) any later version.
+
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU Affero General Public License for more details.
+
+* You should have received a copy of the GNU Affero General Public License
+* along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+using System;
+using System.Diagnostics.Contracts;
namespace Novacoin
{
- public class base_uint
+ /// <summary>
+ /// Base class for uint256 and uint160.
+ /// </summary>
+ public class base_uint : IComparable<base_uint>, IEquatable<base_uint>
{
- protected uint nWidth;
+ protected int nWidth;
protected uint[] pn;
+ public double getDouble()
+ {
+ double ret = 0.0;
+ double fact = 1.0;
+
+ for (int i = 0; i < nWidth; i++)
+ {
+ ret += fact * pn[i];
+ fact *= 4294967296.0;
+ }
+
+ return ret;
+ }
+
+ public ulong GetLow64()
+ {
+ return pn[0] | (ulong)pn[1] << 32;
+ }
+
+ public uint GetLow32()
+ {
+ return pn[0];
+ }
+
+ public int Size
+ {
+ get
+ {
+ return nWidth;
+ }
+ }
+
public static bool operator !(base_uint a)
{
for (int i = 0; i < a.nWidth; i++)
return true;
}
- public static base_uint operator ~(base_uint a)
+
+ public static bool operator <(base_uint a, base_uint b)
{
- var ret = new base_uint();
- for (int i = 0; i < a.nWidth; i++)
+ for (int i = a.nWidth - 1; i >= 0; i--)
{
- ret.pn[i] = ~a.pn[i];
+ if (a.pn[i] < b.pn[i])
+ {
+ return true;
+ }
+ else if (a.pn[i] > b.pn[i])
+ {
+ return false;
+ }
}
- return ret;
+ return false;
}
- public static base_uint operator -(base_uint a)
+ public static bool operator <=(base_uint a, base_uint b)
{
- var ret = new base_uint();
+ for (int i = a.nWidth - 1; i >= 0; i--)
+ {
+ if (a.pn[i] < b.pn[i])
+ {
+ return true;
+ }
+ else if (a.pn[i] > b.pn[i])
+ {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ public static bool operator >(base_uint a, base_uint b)
+ {
+ for (int i = a.nWidth - 1; i >= 0; i--)
+ {
+ if (a.pn[i] > b.pn[i])
+ {
+ return true;
+ }
+ else if (a.pn[i] < b.pn[i])
+ {
+ return false;
+ }
+ }
+ return false;
+ }
+
+ public static bool operator >=(base_uint a, base_uint b)
+ {
+ for (int i = a.nWidth - 1; i >= 0; i--)
+ {
+ if (a.pn[i] > b.pn[i])
+ {
+ return true;
+ }
+ else if (a.pn[i] < b.pn[i])
+ {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ public static bool operator ==(base_uint a, base_uint b)
+ {
+ if (object.ReferenceEquals(a, b))
+ {
+ return true;
+ }
+
for (int i = 0; i < a.nWidth; i++)
{
- ret.pn[i] = ~a.pn[i];
+ if (a.pn[i] != b.pn[i])
+ {
+ return false;
+ }
}
- ret++;
- return ret;
+ return true;
}
- public static base_uint operator ++(base_uint a)
+ public static bool operator ==(base_uint a, ulong b)
{
- // prefix operator
- int i = 0;
- while (++a.pn[i] == 0 && i < a.nWidth - 1)
+ if (a.pn[0] != (uint)b)
{
- i++;
+ return false;
}
- return a;
+
+ if (a.pn[1] != (uint)(b >> 32))
+ {
+ return false;
+ }
+
+ for (int i = 2; i < a.nWidth; i++)
+ {
+ if (a.pn[i] != 0)
+ {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ public static bool operator !=(base_uint a, base_uint b)
+ {
+ return (!(a == b));
+ }
+
+ public static bool operator !=(base_uint a, ulong b)
+ {
+ return (!(a == b));
+ }
+
+ public static bool operator true(base_uint a)
+ {
+ return (a != 0);
}
- public static base_uint operator --(base_uint a)
+ public static bool operator false(base_uint a)
{
- // prefix operator
- int i = 0;
- while (--a.pn[i] == uint.MaxValue && i < a.nWidth - 1)
+ return (a == 0);
+ }
+
+ public static implicit operator byte[] (base_uint a)
+ {
+ return Interop.LEBytes(a.pn);
+ }
+
+ private static bool ArraysEqual(uint[] a, uint[] b)
+ {
+ Contract.Requires<ArgumentException>(a.Length == b.Length, "Array length mismatch.");
+
+ for (int i = 0; i < a.Length; i++)
{
- i++;
+ if (a[i] != b[i])
+ {
+ return false;
+ }
}
- return a;
+ return true;
}
- public static base_uint operator ^(base_uint a, base_uint b)
+ public override int GetHashCode()
{
- var c = new base_uint();
- c.pn = new uint[a.nWidth];
- for (int i = 0; i < c.nWidth; i++)
+ int hash = 17;
+ unchecked
{
- c.pn[i] = a.pn[i] ^ b.pn[i];
+ foreach (var element in pn)
+ {
+ hash = hash * 31 + element.GetHashCode();
+ }
}
- return c;
+ return hash;
}
- public static base_uint operator +(base_uint a, base_uint b)
+ public int CompareTo(base_uint item)
{
- var result = new base_uint();
- ulong carry = 0;
- for (int i = 0; i < result.nWidth; i++)
+ if (this > item)
+ {
+ return 1;
+ }
+ else if (this < item)
{
- ulong n = carry + a.pn[i] + b.pn[i];
- result.pn[i] = (uint)(n & 0xffffffff);
- carry = n >> 32;
+ return -1;
}
- return result;
+
+ return 0;
}
+ public bool Equals(base_uint a)
+ {
+ if (a == null)
+ {
+ return false;
+ }
+
+ return ArraysEqual(pn, a.pn);
+ }
+ public override bool Equals(object o)
+ {
+ return Equals(o as base_uint);
+ }
+ public override string ToString()
+ {
+ return Interop.ToHex(Interop.ReverseBytes(this));
+ }
}
}
git://git.novaco.in / NovacoinLibrary.git / blobdiff