817 lines
22 KiB
C#
817 lines
22 KiB
C#
/*
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* Copyright (c) Contributors, http://opensimulator.org/
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* See CONTRIBUTORS.TXT for a full list of copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the OpenSimulator Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
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* 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 CONTRIBUTORS BE LIABLE FOR ANY
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* 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
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* ON 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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using System;
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using System.Runtime.CompilerServices;
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using OpenSim.Framework;
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using OpenMetaverse;
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using System.Runtime.InteropServices;
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namespace OpenSim.Region.ClientStack.LindenUDP
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{
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public class LLUDPZeroEncoder
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{
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private byte[] m_dest;
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private int zerocount;
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private int pos;
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public LLUDPZeroEncoder()
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{
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}
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public LLUDPZeroEncoder(byte[] data)
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{
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m_dest = data;
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zerocount = 0;
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}
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public byte[] Data
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{
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get
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{
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return m_dest;
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}
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set
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{
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m_dest = value;
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}
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}
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public int ZeroCount
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{
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get
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{
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return zerocount;
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}
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set
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{
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zerocount = value;
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}
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}
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public int Position
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{
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get
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{
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return pos;
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}
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set
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{
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pos = value;
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddZeros(int len)
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{
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zerocount += len;
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ref byte dst = ref MemoryMarshal.GetArrayDataReference(m_dest);
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while (zerocount > 0xff)
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{
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Unsafe.Add(ref dst, pos) = 0x00;
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pos++;
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Unsafe.Add(ref dst, pos) = 0xff;
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pos++;
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zerocount -= 256;
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe int Finish()
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{
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if (zerocount > 0)
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{
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ref byte dst = ref MemoryMarshal.GetArrayDataReference(m_dest);
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Unsafe.Add(ref dst, pos) = 0x00;
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pos++;
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Unsafe.Add(ref dst, pos) = (byte)zerocount;
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pos++;
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}
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return pos;
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}
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public unsafe void AddBytes(byte[] src, int srclen)
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{
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ref byte dst = ref MemoryMarshal.GetArrayDataReference(m_dest);
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for (int i = 0; i < srclen; ++i)
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{
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byte b = src[i];
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if (b == 0x00)
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{
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if (zerocount != 0xff)
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zerocount++;
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else
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{
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Unsafe.Add(ref dst, pos) = 0x00;
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pos++;
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Unsafe.Add(ref dst, pos) = 0xff;
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pos++;
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zerocount = 1;
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}
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}
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else
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{
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if (zerocount != 0)
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{
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Unsafe.Add(ref dst, pos) = 0x00;
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pos++;
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Unsafe.Add(ref dst, pos) = (byte)zerocount;
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pos++;
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zerocount = 0;
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}
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Unsafe.Add(ref dst, pos) = b;
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pos++;
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}
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}
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}
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public unsafe void AddBytes(byte* src, int srclen)
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{
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ref byte dst = ref MemoryMarshal.GetArrayDataReference(m_dest);
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for (int i = 0; i < srclen; ++i)
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{
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if (src[i] == 0x00)
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{
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if (zerocount != 0xff)
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zerocount++;
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else
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{
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Unsafe.Add(ref dst, pos) = 0x00;
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pos++;
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Unsafe.Add(ref dst, pos) = 0xff;
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pos++;
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zerocount = 1;
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}
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}
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else
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{
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if (zerocount != 0)
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{
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Unsafe.Add(ref dst, pos) = 0x00;
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pos++;
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Unsafe.Add(ref dst, pos) = (byte)zerocount;
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pos++;
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zerocount = 0;
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}
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Unsafe.Add(ref dst, pos) = src[i];
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pos++;
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}
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}
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}
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public void AddByte(byte v)
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{
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if (v == 0x00)
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{
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if (zerocount != 0xff)
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zerocount++;
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else
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{
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ref byte dst = ref MemoryMarshal.GetArrayDataReference(m_dest);
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Unsafe.Add(ref dst, pos) = 0x00;
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pos++;
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Unsafe.Add(ref dst, pos) = 0xff;
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pos++;
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zerocount = 1;
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}
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}
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else
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{
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ref byte dst = ref MemoryMarshal.GetArrayDataReference(m_dest);
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if (zerocount != 0)
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{
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Unsafe.Add(ref dst, pos) = 0x00;
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pos++;
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Unsafe.Add(ref dst, pos) = (byte)zerocount;
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pos++;
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zerocount = 0;
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}
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Unsafe.Add(ref dst, pos) = v;
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pos++;
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddInt16(short v)
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{
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if (v == 0)
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AddZeros(2);
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else
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{
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byte* b = stackalloc byte[2];
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Utils.Int16ToBytes(v, b);
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AddBytes(b, 2);
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddUInt16(ushort v)
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{
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if (v == 0)
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AddZeros(2);
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else
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{
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byte* b = stackalloc byte[2];
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Utils.UInt16ToBytes(v, b);
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AddBytes(b, 2);
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddInt(int v)
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{
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if (v == 0)
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AddZeros(4);
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else
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{
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byte* b = stackalloc byte[4];
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Utils.IntToBytes(v, b);
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AddBytes(b, 4);
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddUInt(uint v)
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{
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if (v == 0)
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AddZeros(4);
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else
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{
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byte* b = stackalloc byte[4];
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Utils.UIntToBytes(v, b);
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AddBytes(b, 4);
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddFloatToUInt16(float v, float range)
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{
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byte* b = stackalloc byte[2];
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Utils.FloatToUInt16Bytes(v, range, b);
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AddBytes(b, 2);
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddFloat(float v)
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{
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if (v == 0f)
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AddZeros(4);
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else
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{
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byte* b = stackalloc byte[4];
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Utils.FloatToBytes(v, b);
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AddBytes(b, 4);
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddInt64(long v)
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{
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if (v == 0)
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AddZeros(8);
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else
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{
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byte* b = stackalloc byte[8];
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Utils.Int64ToBytes(v, b);
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AddBytes(b, 8);
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddUInt64(ulong v)
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{
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if (v == 0)
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AddZeros(8);
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else
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{
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byte* b = stackalloc byte[8];
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Utils.UInt64ToBytes(v, b);
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AddBytes(b, 8);
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddVector3(Vector3 v)
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{
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if (v.IsZero())
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AddZeros(12);
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else
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{
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byte* b = stackalloc byte[12];
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v.ToBytes(b);
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AddBytes(b, 12);
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddVector4(Vector4 v)
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{
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if (v.IsZero())
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AddZeros(16);
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else
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{
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byte* b = stackalloc byte[16];
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v.ToBytes(b);
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AddBytes(b, 16);
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddNormQuat(Quaternion v)
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{
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byte* b = stackalloc byte[12];
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v.ToBytes(b);
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AddBytes(b, 12);
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddUUID(UUID v)
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{
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byte* b = stackalloc byte[16];
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v.ToBytes(b);
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AddBytes(b, 16);
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void AddColorArgb(int argb)
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{
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uint ua = (uint)argb ^ 0xff000000;
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if(ua == 0)
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{
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AddZeros(4);
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}
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else
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{
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AddByte((byte)(ua >> 16));
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AddByte((byte)(ua >> 8));
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AddByte((byte)ua);
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AddByte((byte)(ua >> 24));
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}
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}
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// maxlen <= 255 and includes null termination byte
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddShortString(string str, int maxlen)
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{
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if (String.IsNullOrEmpty(str))
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{
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AddZeros(1);
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return;
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}
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byte* data = stackalloc byte[maxlen];
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int len = Util.osUTF8Getbytes(str, data, maxlen, true);
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if (len == 0)
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{
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AddZeros(1);
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return;
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}
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AddByte((byte)(len));
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AddBytes(data, len);
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}
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// maxlen <= 255 and includes null termination byte, maxchars == max len of utf16 source
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddShortString(string str, int maxchars, int maxlen)
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{
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if (String.IsNullOrEmpty(str))
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{
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AddZeros(1);
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return;
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}
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if (str.Length > maxchars)
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str = str.Substring(0, maxchars);
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byte* data = stackalloc byte[maxlen];
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int len = Util.osUTF8Getbytes(str, data, maxlen, true);
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if (len == 0)
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{
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AddZeros(1);
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return;
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}
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AddByte((byte)(len));
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AddBytes(data, len);
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}
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// maxlen <= 254 because null termination byte
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddShortLimitedUTF8(osUTF8 str)
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{
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if (str == null)
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{
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AddZeros(1);
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return;
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}
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int len = str.Length;
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if (len == 0)
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{
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AddZeros(1);
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return;
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}
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AddByte((byte)(len + 1)); // add null
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AddBytes(str.GetArray(), len);
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AddZeros(1);
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}
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}
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public unsafe class LLUDPUnsafeZeroEncoder
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{
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private byte* m_destStart;
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private int m_zerocount;
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private byte* m_dest;
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public LLUDPUnsafeZeroEncoder()
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{
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}
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public LLUDPUnsafeZeroEncoder(byte* data)
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{
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m_destStart = data;
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m_dest = data;
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m_zerocount = 0;
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}
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public byte* Data
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{
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get
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{
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return m_destStart;
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}
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set
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{
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m_destStart = value;
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m_dest = value;
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}
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}
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public int ZeroCount
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{
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get
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{
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return m_zerocount;
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}
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set
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{
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m_zerocount = value;
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}
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}
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public int Position
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{
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get
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{
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return (int)(m_dest - m_destStart);
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}
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set
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{
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m_dest = m_destStart + value;
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe void AddZeros(int len)
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{
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m_zerocount += len;
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while (m_zerocount > 0xff)
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{
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*m_dest++ = 0x00;
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*m_dest++ = 0xff;
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m_zerocount -= 256;
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public unsafe int Finish()
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{
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if (m_zerocount > 0)
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{
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*m_dest++ = 0x00;
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*m_dest++ = (byte)m_zerocount;
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}
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return (int)(m_dest - m_destStart);
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}
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public unsafe void AddBytes(byte[] src, int srclen)
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{
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for (int i = 0; i < srclen; ++i)
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{
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if (src[i] == 0x00)
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{
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if (m_zerocount != 0xff)
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m_zerocount++;
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else
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{
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*m_dest++ = 0x00;
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*m_dest++ = 0xff;
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m_zerocount = 1;
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}
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}
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else
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{
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if (m_zerocount != 0)
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{
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*m_dest++ = 0x00;
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*m_dest++ = (byte)m_zerocount;
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m_zerocount = 0;
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}
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*m_dest++ = src[i];
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}
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}
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}
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public unsafe void AddBytes(byte* src, int srclen)
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{
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for (int i = 0; i < srclen; ++i)
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{
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if (src[i] == 0x00)
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{
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if (m_zerocount != 0xff)
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m_zerocount++;
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else
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{
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*m_dest++ = 0x00;
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*m_dest++ = 0xff;
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m_zerocount = 1;
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}
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}
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else
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{
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if (m_zerocount != 0)
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{
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*m_dest++ = 0x00;
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*m_dest++ = (byte)m_zerocount;
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m_zerocount = 0;
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}
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*m_dest++ = src[i];
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}
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}
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}
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public unsafe void AddByte(byte v)
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{
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if (v == 0x00)
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{
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if (m_zerocount != 0xff)
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m_zerocount++;
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else
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{
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*m_dest++ = 0x00;
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*m_dest++ = 0xff;
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m_zerocount = 1;
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}
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}
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else
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{
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if (m_zerocount != 0)
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{
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*m_dest++ = 0x00;
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*m_dest++ = (byte)m_zerocount;
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m_zerocount = 0;
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}
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*m_dest++ = v;
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void AddInt16(short v)
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{
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if (v == 0)
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AddZeros(2);
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else
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{
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byte* b = stackalloc byte[2];
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Utils.Int16ToBytes(v, b);
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AddBytes(b, 2);
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public void AddUInt16(ushort v)
|
|
{
|
|
if (v == 0)
|
|
AddZeros(2);
|
|
else
|
|
{
|
|
byte* b = stackalloc byte[2];
|
|
Utils.UInt16ToBytes(v, b);
|
|
AddBytes(b, 2);
|
|
}
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public void AddInt(int v)
|
|
{
|
|
if (v == 0)
|
|
AddZeros(4);
|
|
else
|
|
{
|
|
byte* b = stackalloc byte[4];
|
|
Utils.IntToBytes(v, b);
|
|
AddBytes(b, 4);
|
|
}
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public unsafe void AddUInt(uint v)
|
|
{
|
|
if (v == 0)
|
|
AddZeros(4);
|
|
else
|
|
{
|
|
byte* b = stackalloc byte[4];
|
|
Utils.UIntToBytes(v, b);
|
|
AddBytes(b, 4);
|
|
}
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public void AddFloatToUInt16(float v, float range)
|
|
{
|
|
byte* b = stackalloc byte[2];
|
|
Utils.FloatToUInt16Bytes(v, range, b);
|
|
AddBytes(b, 2);
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public void AddFloat(float v)
|
|
{
|
|
if (v == 0f)
|
|
AddZeros(4);
|
|
else
|
|
{
|
|
byte* b = stackalloc byte[4];
|
|
Utils.FloatToBytes(v, b);
|
|
AddBytes(b, 4);
|
|
}
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public void AddInt64(long v)
|
|
{
|
|
if (v == 0)
|
|
AddZeros(8);
|
|
else
|
|
{
|
|
byte* b = stackalloc byte[8];
|
|
Utils.Int64ToBytes(v, b);
|
|
AddBytes(b, 8);
|
|
}
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public void AddUInt64(ulong v)
|
|
{
|
|
if (v == 0)
|
|
AddZeros(8);
|
|
else
|
|
{
|
|
byte* b = stackalloc byte[8];
|
|
Utils.UInt64ToBytes(v, b);
|
|
AddBytes(b, 8);
|
|
}
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public void AddVector3(Vector3 v)
|
|
{
|
|
if (v.IsZero())
|
|
AddZeros(12);
|
|
else
|
|
{
|
|
byte* b = stackalloc byte[12];
|
|
v.ToBytes(b);
|
|
AddBytes(b, 12);
|
|
}
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public void AddVector4(Vector4 v)
|
|
{
|
|
if (v.IsZero())
|
|
AddZeros(16);
|
|
else
|
|
{
|
|
byte* b = stackalloc byte[16];
|
|
v.ToBytes(b);
|
|
AddBytes(b, 16);
|
|
}
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public void AddNormQuat(Quaternion v)
|
|
{
|
|
byte* b = stackalloc byte[12];
|
|
v.ToBytes(b);
|
|
AddBytes(b, 12);
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public void AddUUID(UUID v)
|
|
{
|
|
byte* b = stackalloc byte[16];
|
|
v.ToBytes(b);
|
|
AddBytes(b, 16);
|
|
}
|
|
|
|
// maxlen <= 255 and includes null termination byte
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public unsafe void AddShortString(string str, int maxlen)
|
|
{
|
|
if (String.IsNullOrEmpty(str))
|
|
{
|
|
AddZeros(1);
|
|
return;
|
|
}
|
|
|
|
byte* data = stackalloc byte[maxlen];
|
|
int len = Util.osUTF8Getbytes(str, data, maxlen, true);
|
|
|
|
if (len == 0)
|
|
{
|
|
AddZeros(1);
|
|
return;
|
|
}
|
|
|
|
AddByte((byte)(len));
|
|
AddBytes(data, len);
|
|
}
|
|
|
|
// maxlen <= 255 and includes null termination byte, maxchars == max len of utf16 source
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public unsafe void AddShortString(string str, int maxchars, int maxlen)
|
|
{
|
|
if (String.IsNullOrEmpty(str))
|
|
{
|
|
AddZeros(1);
|
|
return;
|
|
}
|
|
|
|
if (str.Length > maxchars)
|
|
str = str.Substring(0, maxchars);
|
|
|
|
byte* data = stackalloc byte[maxlen];
|
|
int len = Util.osUTF8Getbytes(str, data, maxlen, true);
|
|
|
|
if (len == 0)
|
|
{
|
|
AddZeros(1);
|
|
return;
|
|
}
|
|
|
|
AddByte((byte)(len));
|
|
AddBytes(data, len);
|
|
}
|
|
|
|
// maxlen <= 254 because null termination byte
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public unsafe void AddShortLimitedUTF8(osUTF8 str)
|
|
{
|
|
if (str == null)
|
|
{
|
|
AddZeros(1);
|
|
return;
|
|
}
|
|
|
|
int len = str.Length;
|
|
if (len == 0)
|
|
{
|
|
AddZeros(1);
|
|
return;
|
|
}
|
|
|
|
AddByte((byte)(len + 1)); // add null
|
|
AddBytes(str.GetArray(), len);
|
|
AddZeros(1);
|
|
}
|
|
}
|
|
} |