-\feffusing System;
+\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.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using System.IO;
namespace Novacoin
{
/// </summary>
/// <param name="n">Unsigned integer value</param>
/// <returns>Byte sequence</returns>
- public static IList<byte> EncodeVarInt(ulong n)
+ public static byte[] EncodeVarInt(ulong n)
{
- List<byte> resultBytes = new List<byte>();
+ var resultBytes = new List<byte>();
if (n <= 0xfc)
{
{
// ushort flag
prefix = 0xfd;
- valueBytes = Interop.LEBytes((ushort)n);
+ valueBytes = BitConverter.GetBytes((ushort)n);
}
else if (n <= uint.MaxValue)
{
// uint flag
prefix = 0xfe;
- valueBytes = Interop.LEBytes((uint)n);
+ valueBytes = BitConverter.GetBytes((uint)n);
}
else
{
// ulong flag
prefix = 0xff;
- valueBytes = Interop.LEBytes(n);
+ valueBytes = BitConverter.GetBytes(n);
}
resultBytes.Add(prefix);
resultBytes.AddRange(valueBytes);
}
- return resultBytes;
+ return resultBytes.ToArray();
}
/// <summary>
/// </summary>
/// <param name="n">Integer value</param>
/// <returns>Byte sequence</returns>
- public static IList<byte> EncodeVarInt(long n)
+ public static byte[] EncodeVarInt(long n)
{
return EncodeVarInt((ulong)n);
}
+ public static int GetEncodedSize(long n)
+ {
+ if (n <= 0xfc)
+ {
+ return 1;
+ }
+ else if (n <= ushort.MaxValue)
+ {
+ return 3;
+ }
+ else if (n <= uint.MaxValue)
+ {
+ return 5;
+ }
+ else
+ {
+ return 9;
+ }
+ }
+
/// <summary>
/// Decodes integer value from compact representation
///
/// </summary>
/// <param name="bytes">Byte sequence</param>
/// <returns>Integer value</returns>
- public static ulong DecodeVarInt(IList<byte> bytes)
+ public static ulong DecodeVarInt(byte[] bytes)
{
- byte prefix = bytes[0];
+ var prefix = bytes[0];
+ var bytesArray = new byte[bytes.Length - 1];
- bytes.RemoveAt(0); // Remove prefix
+ bytes.CopyTo(bytesArray, 1); // Get rid of prefix
- byte[] bytesArray = bytes.ToArray();
-
- if (BitConverter.IsLittleEndian)
- {
- switch (prefix)
- {
- case 0xfd: // ushort flag
- return BitConverter.ToUInt16(bytesArray, 0);
- case 0xfe: // uint flag
- return BitConverter.ToUInt32(bytesArray, 0);
- case 0xff: // ulong flag
- return BitConverter.ToUInt64(bytesArray, 0);
- default:
- return prefix;
- }
- }
- else
+ switch (prefix)
{
- // Values are stored in little-endian order
- switch (prefix)
- {
- case 0xfd: // ushort flag
- Array.Resize<byte>(ref bytesArray, 2);
- Array.Reverse(bytesArray);
- return BitConverter.ToUInt16(bytesArray, 0);
- case 0xfe: // uint flag
- Array.Resize<byte>(ref bytesArray, 4);
- Array.Reverse(bytesArray);
- return BitConverter.ToUInt32(bytesArray, 0);
- case 0xff: // ulong flag
- Array.Resize<byte>(ref bytesArray, 8);
- Array.Reverse(bytesArray);
- return BitConverter.ToUInt64(bytesArray, 0);
- default:
- return prefix;
- }
+ case 0xfd: // ushort flag
+ return BitConverter.ToUInt16(bytesArray, 0);
+ case 0xfe: // uint flag
+ return BitConverter.ToUInt32(bytesArray, 0);
+ case 0xff: // ulong flag
+ return BitConverter.ToUInt64(bytesArray, 0);
+ default:
+ return prefix;
}
}
- /// <summary>
- /// Read and decode variable integer from wrapped list object.
- ///
- /// Note: Should be used only if there is some variable integer data at current position. Otherwise you will get undefined behavior, so make sure that you know what you are doing.
- /// </summary>
- /// <param name="wBytes"></param>
- /// <returns></returns>
- public static ulong ReadVarInt(ref WrappedList<byte> wBytes)
+ public static ulong ReadVarInt(ref BinaryReader reader)
{
- byte prefix = wBytes.GetItem();
+ byte prefix = reader.ReadByte();
switch (prefix)
{
case 0xfd: // ushort
- return Interop.LEBytesToUInt16(wBytes.GetItems(2));
+ return reader.ReadUInt16();
case 0xfe: // uint
- return Interop.LEBytesToUInt32(wBytes.GetItems(4));
+ return reader.ReadUInt32();
case 0xff: // ulong
- return Interop.LEBytesToUInt64(wBytes.GetItems(8));
+ return reader.ReadUInt64();
default:
return prefix;
}
-
}
+
}
}
git://git.novaco.in / NovacoinLibrary.git / blobdiff