X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=Novacoin%2Fuint160.cs;h=be4d9180a4e5542b4c8b9cc19dbb74f44ae3f593;hb=a1df90fa7b7daf76469bd5e691910c74d92bf802;hp=14175629de789509738a78d6cc8b52e30fa5bdd0;hpb=80b9c15a0c2d1b87180824a36948e37894cebaca;p=NovacoinLibrary.git
diff --git a/Novacoin/uint160.cs b/Novacoin/uint160.cs
index 1417562..be4d918 100644
--- a/Novacoin/uint160.cs
+++ b/Novacoin/uint160.cs
@@ -1,32 +1,50 @@
-using System;
-using System.Collections.Generic;
+/**
+ * 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 .
+ */
+
+using System;
using System.Diagnostics.Contracts;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
namespace Novacoin
{
public class uint160 : base_uint
{
- new protected readonly int nWidth = 5;
+ #region Access to internal representation
+ new protected int nWidth
+ {
+ get { return base.nWidth; }
+ private set { base.nWidth = value; }
+ }
+ new protected uint[] pn
+ {
+ get { return base.pn; }
+ private set { base.pn = value; }
+ }
+ #endregion
+ #region Constructors
public uint160()
{
- base.nWidth = nWidth;
+ nWidth = 5;
pn = new uint[nWidth];
-
- for (int i = 0; i < nWidth; i++)
- {
- pn[i] = 0;
- }
}
- public uint160(uint160 b)
+ public uint160(uint160 b) : this()
{
- base.nWidth = nWidth;
- pn = new uint[nWidth];
-
for (int i = 0; i < nWidth; i++)
{
pn[i] = b.pn[i];
@@ -34,11 +52,8 @@ namespace Novacoin
}
- public uint160(ulong n)
+ public uint160(ulong n) : this()
{
- base.nWidth = nWidth;
- pn = new uint[nWidth];
-
pn[0] = (uint)n;
pn[1] = (uint)(n >> 32);
for (int i = 2; i < nWidth; i++)
@@ -47,76 +62,78 @@ namespace Novacoin
}
}
- public uint160(byte[] bytes)
+ public uint160(byte[] bytes) : this()
{
Contract.Requires(bytes.Length == 20, "Incorrect array length");
-
- base.nWidth = nWidth;
pn = Interop.ToUInt32Array(bytes);
}
- public uint160(string hex)
+ public uint160(string hex) : this()
{
Contract.Requires(hex.Length == 40, "Incorrect string");
-
- base.nWidth = nWidth;
var bytes = Interop.ReverseBytes(Interop.HexToArray(hex));
pn = Interop.ToUInt32Array(bytes);
}
+ #endregion
- public static uint160 operator ~(uint160 a)
+ #region Cast operators
+ public static implicit operator uint160(byte[] bytes)
{
- var ret = new uint160();
- for (int i = 0; i < a.nWidth; i++)
- {
- ret.pn[i] = ~a.pn[i];
- }
- return ret;
+ return new uint160(bytes);
}
- public static uint160 operator -(uint160 a)
+ public static implicit operator uint160(ulong n)
+ {
+ return new uint160(n);
+ }
+ #endregion
+
+ #region Bitwise operations
+ public static uint160 operator ~(uint160 a)
{
var ret = new uint160();
for (int i = 0; i < a.nWidth; i++)
{
ret.pn[i] = ~a.pn[i];
}
- ret++;
return ret;
}
-
- public static uint160 operator ++(uint160 a)
+ public static uint160 operator ^(uint160 a, uint160 b)
{
- int i = 0;
- while (++a.pn[i] == 0 && i < a.nWidth - 1)
+ var result = new uint160();
+ result.pn = new uint[a.nWidth];
+ for (int i = 0; i < result.nWidth; i++)
{
- i++;
+ result.pn[i] = a.pn[i] ^ b.pn[i];
}
- return a;
+ return result;
}
- public static uint160 operator --(uint160 a)
+ public static uint160 operator &(uint160 a, uint160 b)
{
- int i = 0;
- while (--a.pn[i] == uint.MaxValue && i < a.nWidth - 1)
+ var result = new uint160();
+ result.pn = new uint[a.nWidth];
+ for (int i = 0; i < result.nWidth; i++)
{
- i++;
+ result.pn[i] = a.pn[i] & b.pn[i];
}
- return a;
+ return result;
}
- public static uint160 operator ^(uint160 a, uint160 b)
+ public static uint160 operator |(uint160 a, uint160 b)
{
var result = new uint160();
result.pn = new uint[a.nWidth];
for (int i = 0; i < result.nWidth; i++)
{
- result.pn[i] = a.pn[i] ^ b.pn[i];
+ result.pn[i] = a.pn[i] | b.pn[i];
}
return result;
}
+ #endregion
+ #region Basic arithmetics
public static uint160 operator +(uint160 a, uint160 b)
{
var result = new uint160();
@@ -145,28 +162,74 @@ namespace Novacoin
return a - new uint160(b);
}
- public static uint160 operator &(uint160 a, uint160 b)
+ public static uint160 operator -(uint160 a)
{
- var result = new uint160();
- result.pn = new uint[a.nWidth];
- for (int i = 0; i < result.nWidth; i++)
+ var ret = new uint160();
+ for (int i = 0; i < a.nWidth; i++)
{
- result.pn[i] = a.pn[i] & b.pn[i];
+ ret.pn[i] = ~a.pn[i];
}
- return result;
+ ret++;
+ return ret;
}
- public static uint160 operator |(uint160 a, uint160 b)
+
+ public static uint160 operator ++(uint160 a)
+ {
+ int i = 0;
+ while (++a.pn[i] == 0 && i < a.nWidth - 1)
+ {
+ i++;
+ }
+ return a;
+ }
+
+ public static uint160 operator --(uint160 a)
+ {
+ int i = 0;
+ while (--a.pn[i] == uint.MaxValue && i < a.nWidth - 1)
+ {
+ i++;
+ }
+ return a;
+ }
+
+ public static uint160 operator /(uint160 a, uint divisor)
{
var result = new uint160();
- result.pn = new uint[a.nWidth];
- for (int i = 0; i < result.nWidth; i++)
+
+ ulong r = 0;
+ int i = a.nWidth;
+
+ while (i-- > 0)
{
- result.pn[i] = a.pn[i] | b.pn[i];
+ r <<= 32;
+ r |= a.pn[i];
+ result.pn[i] = (uint)(r / divisor);
+ r %= divisor;
}
+
return result;
}
+ public static uint operator %(uint160 a, uint divisor)
+ {
+ ulong r = 0;
+ int i = a.nWidth;
+
+ while (i-- > 0)
+ {
+ r <<= 32;
+ r |= a.pn[i];
+ r %= divisor;
+ }
+
+ return (uint)r;
+ }
+
+ #endregion
+
+ #region Shift
public static uint160 operator <<(uint160 a, int shift)
{
var result = new uint160();
@@ -210,5 +273,6 @@ namespace Novacoin
return result;
}
+ #endregion
}
}