/**
* 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.Collections.Generic;
using System.Diagnostics.Contracts;
using System.IO;
using System.Linq;
using System.Text;
namespace Novacoin
{
public class COutPoint : IComparable, IEquatable, IEqualityComparer
{
///
/// Hash of parent transaction.
///
public uint256 hash;
///
/// Parent input number.
///
public uint n;
///
/// Out reference is always 36 bytes long.
///
public const int Size = 36;
public COutPoint()
{
hash = new uint256();
n = uint.MaxValue;
}
public COutPoint(uint256 hashIn, uint nIn)
{
hash = hashIn;
n = nIn;
}
public COutPoint(COutPoint o)
{
hash = o.hash;
n = o.n;
}
public COutPoint(byte[] bytes)
{
Contract.Requires(bytes.Length == 36, "Any valid outpoint reference data item is exactly 36 bytes long.");
hash = bytes.Take(32).ToArray();
n = BitConverter.ToUInt32(bytes, 32);
}
public bool IsNull
{
get { return !hash && n == uint.MaxValue; }
}
public static implicit operator byte[] (COutPoint o)
{
var stream = new MemoryStream();
var writer = new BinaryWriter(stream);
writer.Write(o.hash);
writer.Write(o.n);
var outBytes = stream.ToArray();
writer.Close();
return outBytes;
}
public static implicit operator COutPoint(byte[] b)
{
return new COutPoint(b);
}
public override string ToString()
{
var sb = new StringBuilder();
sb.AppendFormat("COutPoint({0}, {1})", hash, n);
return sb.ToString();
}
///
/// Compare this outpoint with some other.
///
/// Other outpoint.
/// Result of comparison.
public int CompareTo(COutPoint o)
{
if (n > o.n)
{
return 1;
}
else if (n < o.n)
{
return -1;
}
return 0;
}
///
/// Equality comparer for outpoints.
///
/// Other outpoint.
/// Result of comparison.
public bool Equals(COutPoint o)
{
if (object.ReferenceEquals(o, null))
{
return false;
}
return (o.n == n) && (o.hash == hash);
}
///
/// Equality comparer for outpoints.
///
/// First outpoint.
/// Second outpoint.
/// Result of comparison.
public bool Equals(COutPoint x, COutPoint y)
{
return (x.n == y.n) && (x.hash == y.hash);
}
public override int GetHashCode()
{
return n.GetHashCode() ^ hash.GetHashCode();
}
public int GetHashCode(COutPoint obj)
{
return obj.GetHashCode();
}
}
}