+++ /dev/null
-\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;
-using System.Linq;
-
-namespace Novacoin
-{
- public abstract class Hash : IEquatable<Hash>, IComparable<Hash>
- {
- /// <summary>
- /// Array of digest bytes.
- /// </summary>
- protected byte[] _hashBytes;
-
- /// <summary>
- /// Hash size, must be overriden
- /// </summary>
- public abstract int hashSize
- {
- get;
- }
-
- /// <summary>
- /// Initializes an empty instance of the Hash class.
- /// </summary>
- public Hash()
- {
- _hashBytes = new byte[hashSize];
- }
-
- /// <summary>
- /// Initializes a new instance of Hash class
- /// </summary>
- /// <param name="bytesList">Array of bytes</param>
- public Hash(byte[] bytes, int offset = 0)
- {
- if (bytes.Length - offset < hashSize)
- {
- throw new ArgumentException("You need to provide a sufficient amount of data to initialize new instance of hash object.");
- }
-
- _hashBytes = new byte[hashSize];
- Array.Copy(bytes, offset, _hashBytes, 0, hashSize);
- }
-
- /// <summary>
- /// Initializes a new instance of Hash class as a copy of another one
- /// </summary>
- /// <param name="bytesList">Instance of hash class</param>
- public Hash(Hash h)
- {
- _hashBytes = new byte[h.hashSize];
- h._hashBytes.CopyTo(_hashBytes, 0);
- }
-
- public bool IsZero
- {
- get { return !_hashBytes.Any(b => b != 0); }
- }
-
- public static implicit operator byte[](Hash h)
- {
- return h._hashBytes;
- }
-
- public bool Equals(Hash item)
- {
- if ((object)item == null)
- {
- return false;
- }
- return _hashBytes.SequenceEqual((byte[])item);
- }
-
- public override bool Equals(object o)
- {
- if (o == null)
- {
- return false;
- }
-
- return _hashBytes.SequenceEqual(((Hash)o)._hashBytes);
- }
-
- public override int GetHashCode()
- {
- int hash = 17;
- unchecked
- {
- foreach (var element in _hashBytes)
- {
- hash = hash * 31 + element.GetHashCode();
- }
- }
- return hash;
- }
-
- public int CompareTo(Hash item)
- {
- if (this > item)
- {
- return 1;
- }
- else if (this < item)
- {
- return -1;
- }
-
- return 0;
- }
-
- public static bool operator <(Hash a, Hash b)
- {
- Contract.Requires<NullReferenceException>((object)a != null && (object)b != null, "Null references are not allowed.");
- Contract.Requires<ArgumentException>(a.hashSize == b.hashSize, "Hashes must have the same size.");
-
- for (int i = a.hashSize - 1; i >= 0; i--)
- {
- if (a._hashBytes[i] < b._hashBytes[i])
- {
- return true;
- }
- else if (a._hashBytes[i] > b._hashBytes[i])
- {
- return false;
- }
- }
-
- return false;
- }
-
- public static bool operator <=(Hash a, Hash b)
- {
- Contract.Requires<NullReferenceException>((object)a != null && (object)b != null, "Null references are not allowed.");
- Contract.Requires<ArgumentException>(a.hashSize == b.hashSize, "Hashes must have the same size.");
-
- for (int i = a.hashSize - 1; i >= 0; i--)
- {
- if (a._hashBytes[i] < b._hashBytes[i])
- {
- return true;
- }
- else if (a._hashBytes[i] > b._hashBytes[i])
- {
- return false;
- }
- }
-
- return false;
- }
-
- public static bool operator >(Hash a, Hash b)
- {
- Contract.Requires<NullReferenceException>((object)a != null && (object)b != null, "Null references are not allowed.");
- Contract.Requires<ArgumentException>(a.hashSize == b.hashSize, "Hashes must have the same size.");
-
- for (int i = a.hashSize - 1; i >= 0; i--)
- {
- if (a._hashBytes[i] > b._hashBytes[i])
- {
- return true;
- }
- else if (a._hashBytes[i] < b._hashBytes[i])
- {
- return false;
- }
- }
-
- return false;
- }
-
- public static bool operator >=(Hash a, Hash b)
- {
- Contract.Requires<NullReferenceException>((object)a != null && (object)b != null, "Null references are not allowed.");
- Contract.Requires<ArgumentException>(a.hashSize == b.hashSize, "Hashes must have the same size.");
-
- for (int i = a.hashSize - 1; i >= 0; i--)
- {
- if (a._hashBytes[i] > b._hashBytes[i])
- {
- return true;
- }
- else if (a._hashBytes[i] < b._hashBytes[i])
- {
- return false;
- }
- }
-
- return true;
- }
-
- public static bool operator ==(Hash a, Hash b)
- {
- Contract.Requires<NullReferenceException>((object)a != null && (object)b != null, "Null references are not allowed.");
- Contract.Requires<ArgumentException>(a.hashSize == b.hashSize, "Hashes must have the same size.");
-
- return a._hashBytes.SequenceEqual(b._hashBytes);
- }
-
- public static bool operator !=(Hash a, Hash b)
- {
- return !(a == b);
- }
-
- public override string ToString()
- {
- return Interop.ToHex(Interop.ReverseBytes(_hashBytes));
- }
- }
-}
git://git.novaco.in / NovacoinLibrary.git / blobdiff