mirror of
https://github.com/bizzehdee/bzTorrent.git
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121 lines
4.1 KiB
C#
121 lines
4.1 KiB
C#
/*
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Copyright (c) 2013, Darren Horrocks
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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* Neither the name of Darren Horrocks nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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namespace System.Net.Torrent
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{
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public static class Unpack
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{
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public enum Endianness
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{
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Machine,
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Big,
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Little
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}
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public static Int16 Int16(byte[] bytes, Int32 start, Endianness e = Endianness.Machine)
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{
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byte[] intBytes = Utils.CopyBytes(bytes, start, 2);
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if (NeedsFlipping(e)) Array.Reverse(intBytes);
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return BitConverter.ToInt16(intBytes, 0);
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}
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public static Int32 Int32(byte[] bytes, Int32 start, Endianness e = Endianness.Machine)
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{
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byte[] intBytes = Utils.CopyBytes(bytes, start, 4);
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if (NeedsFlipping(e)) Array.Reverse(intBytes);
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return BitConverter.ToInt32(intBytes, 0);
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}
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public static Int64 Int64(byte[] bytes, Int32 start, Endianness e = Endianness.Machine)
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{
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byte[] intBytes = Utils.CopyBytes(bytes, start, 8);
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if (NeedsFlipping(e)) Array.Reverse(intBytes);
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return BitConverter.ToInt64(intBytes, 0);
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}
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public static UInt16 UInt16(byte[] bytes, Int32 start, Endianness e = Endianness.Machine)
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{
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byte[] intBytes = Utils.CopyBytes(bytes, start, 2);
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if (NeedsFlipping(e)) Array.Reverse(intBytes);
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return BitConverter.ToUInt16(intBytes, 0);
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}
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public static UInt32 UInt32(byte[] bytes, Int32 start, Endianness e = Endianness.Machine)
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{
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byte[] intBytes = Utils.CopyBytes(bytes, start, 4);
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if (NeedsFlipping(e)) Array.Reverse(intBytes);
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return BitConverter.ToUInt32(intBytes, 0);
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}
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public static UInt64 UInt64(byte[] bytes, Int32 start, Endianness e = Endianness.Machine)
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{
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byte[] intBytes = Utils.CopyBytes(bytes, start, 8);
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if (NeedsFlipping(e)) Array.Reverse(intBytes);
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return BitConverter.ToUInt64(intBytes, 0);
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}
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private static bool NeedsFlipping(Endianness e)
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{
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switch (e)
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{
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case Endianness.Big:
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return BitConverter.IsLittleEndian;
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case Endianness.Little:
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return !BitConverter.IsLittleEndian;
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}
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return false;
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}
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public static String Hex(byte[] bytes, Endianness e = Endianness.Machine)
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{
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String str = "";
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foreach (byte b in bytes)
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{
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str += String.Format("{0:X2}", b);
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}
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return str;
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}
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}
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}
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