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Reorganizes Project (#41)

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Kamron Batman 2019-08-02 18:13:40 -07:00 • committed by GitHub
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3499 changed files with 79 additions and 55 deletions
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Projects/Server/Network/PacketReader.cs Normal file
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@ -0,0 +1,315 @@
/***************************************************************************
* PacketReader.cs
* -------------------
* begin : May 1, 2002
* copyright : (C) The RunUO Software Team
* email : info@runuo.com
*
* $Id$
*
***************************************************************************/
/***************************************************************************
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
***************************************************************************/
using System;
using System.Buffers;
using System.IO;
using System.IO.Pipelines;
using System.Text;
namespace Server.Network
{
public ref struct PacketReader
{
private SequenceReader<byte> m_Reader;
public SequencePosition Position => m_Reader.Position;
public long Length => m_Reader.Length;
public long Consumed => m_Reader.Consumed;
public long Remaining => m_Reader.Remaining;
public PacketReader(ReadOnlySequence<byte> seq)
{
m_Reader = new SequenceReader<byte>(seq);
}
public byte Peek() => m_Reader.TryPeek(out byte value) ? value : (byte)0;
public void Trace(NetState state)
{
try
{
using (StreamWriter sw = new StreamWriter("Packets.log", true))
{
byte[] buffer = m_Reader.Sequence.ToArray();
if (buffer.Length > 0)
sw.WriteLine("Client: {0}: Unhandled packet 0x{1:X2}", state, buffer[0]);
using (MemoryStream ms = new MemoryStream(buffer))
{
Utility.FormatBuffer(sw, ms, buffer.Length);
}
sw.WriteLine();
sw.WriteLine();
}
}
catch
{
// ignored
}
}
public SequencePosition Seek(long offset, SeekOrigin origin)
{
switch (origin)
{
case SeekOrigin.Begin:
if (offset < m_Reader.Consumed)
m_Reader.Rewind(m_Reader.Consumed - Math.Max(offset, 0L));
else
m_Reader.Advance(offset - m_Reader.Consumed);
break;
case SeekOrigin.Current:
if (offset < 0)
m_Reader.Rewind(Math.Min(m_Reader.Consumed, offset * -1));
else
m_Reader.Advance(Math.Min(m_Reader.Remaining, offset));
break;
case SeekOrigin.End:
long count = m_Reader.Remaining - offset;
if (count < 0)
m_Reader.Rewind(count * -1);
else if (count > 0)
m_Reader.Advance(count);
break;
}
return m_Reader.Position;
}
public bool TryReadByte(out byte value) => m_Reader.TryRead(out value);
public int ReadInt32() => m_Reader.TryReadBigEndian(out int value) ? value : 0;
public short ReadInt16() => m_Reader.TryReadBigEndian(out short value) ? value : (short)0;
public byte ReadByte() => m_Reader.TryRead(out byte value) ? value : (byte)0;
public uint ReadUInt32() => (uint)ReadInt32();
public ushort ReadUInt16() => (ushort)ReadInt16();
public sbyte ReadSByte() => (sbyte)ReadByte();
public bool ReadBoolean() => ReadByte() > 0;
public string ReadUnicodeStringLE()
{
StringBuilder sb = new StringBuilder();
while (m_Reader.TryReadLittleEndian(out short c) && c != 0)
sb.Append((char)c);
return sb.ToString();
}
public string ReadUnicodeStringLE(int fixedLength)
{
StringBuilder sb = new StringBuilder();
while (fixedLength-- > 0 && m_Reader.TryReadLittleEndian(out short c) && c != 0)
sb.Append((char)c);
if (fixedLength > 0)
m_Reader.Advance(fixedLength);
return sb.ToString();
}
public string ReadUnicodeStringLESafe(int fixedLength)
{
StringBuilder sb = new StringBuilder();
while (fixedLength-- > 0 && m_Reader.TryReadLittleEndian(out short c) && c != 0)
if (IsSafeChar(c))
sb.Append((char)c);
if (fixedLength > 0)
m_Reader.Advance(fixedLength * 2);
return sb.ToString();
}
public string ReadUnicodeStringLESafe()
{
StringBuilder sb = new StringBuilder();
while (m_Reader.TryReadLittleEndian(out short c) && c != 0)
if (IsSafeChar(c))
sb.Append((char)c);
return sb.ToString();
}
public string ReadUnicodeStringSafe()
{
StringBuilder sb = new StringBuilder();
while (m_Reader.TryReadBigEndian(out short c) && c != 0)
if (IsSafeChar(c))
sb.Append((char)c);
return sb.ToString();
}
public string ReadUnicodeString()
{
StringBuilder sb = new StringBuilder();
while (m_Reader.TryReadBigEndian(out short c) && c != 0)
sb.Append((char)c);
return sb.ToString();
}
public bool IsSafeChar(int c)
{
return c >= 0x20 && c < 0xFFFE;
}
public string ReadUTF8StringSafe(int fixedLength)
{
string s;
if (m_Reader.TryReadTo(out ReadOnlySpan<byte> span, (byte)'\0', true))
s = Utility.UTF8.GetString(span.Length > fixedLength ? span.Slice(0, fixedLength) : span);
else
{
long size = Math.Min(m_Reader.Remaining, fixedLength);
s = Utility.UTF8.GetString(m_Reader.Sequence.Slice(m_Reader.Position, size).ToArray());
m_Reader.Advance(size);
}
StringBuilder sb = new StringBuilder(s.Length);
for (int i = 0; i < s.Length; ++i)
if (IsSafeChar(s[i]))
sb.Append(s[i]);
return sb.ToString();
}
public string ReadUTF8StringSafe()
{
string s;
if (m_Reader.TryReadTo(out ReadOnlySpan<byte> span, (byte)'\0', true))
s = Utility.UTF8.GetString(span);
else
{
s = Utility.UTF8.GetString(m_Reader.Sequence.Slice(m_Reader.Position, m_Reader.Remaining).ToArray());
m_Reader.Advance(m_Reader.Remaining);
}
StringBuilder sb = new StringBuilder(s.Length);
for (int i = 0; i < s.Length; ++i)
if (IsSafeChar(s[i]))
sb.Append(s[i]);
return sb.ToString();
}
public string ReadUTF8String()
{
return Utility.UTF8.GetString(
m_Reader.TryReadTo(out ReadOnlySpan<byte> span, (byte)'\0', true) ? span :
m_Reader.Sequence.Slice(m_Reader.Position, m_Reader.Remaining).ToArray()
);
}
public string ReadString()
{
StringBuilder sb = new StringBuilder();
while (m_Reader.TryRead(out byte c))
sb.Append((char)c);
return sb.ToString();
}
public string ReadStringSafe()
{
StringBuilder sb = new StringBuilder();
while (m_Reader.TryRead(out byte c))
if (IsSafeChar(c))
sb.Append((char)c);
return sb.ToString();
}
public string ReadUnicodeStringSafe(int fixedLength)
{
StringBuilder sb = new StringBuilder();
while (fixedLength-- > 0 && m_Reader.TryReadBigEndian(out short c) && c != 0)
if (IsSafeChar(c))
sb.Append((char)c);
if (fixedLength > 0)
m_Reader.Advance(fixedLength * 2);
return sb.ToString();
}
public string ReadUnicodeString(int fixedLength)
{
StringBuilder sb = new StringBuilder();
while (fixedLength-- > 0 && m_Reader.TryReadBigEndian(out short c) && c != 0)
sb.Append((char)c);
if (fixedLength > 0)
m_Reader.Advance(fixedLength * 2);
return sb.ToString();
}
public string ReadStringSafe(int fixedLength)
{
StringBuilder sb = new StringBuilder();
while (fixedLength-- > 0 && m_Reader.TryRead(out byte c) && c != 0)
if (IsSafeChar(c))
sb.Append((char)c);
if (fixedLength > 0)
m_Reader.Advance(fixedLength);
return sb.ToString();
}
public string ReadString(int fixedLength)
{
StringBuilder sb = new StringBuilder();
while (fixedLength-- > 0 && m_Reader.TryRead(out byte c) && c != 0)
sb.Append((char)c);
if (fixedLength > 0)
m_Reader.Advance(fixedLength);
return sb.ToString();
}
}
}