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Token.cs
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Token.cs
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/**
* Copyright (C) 2006 Alex Pedenko
*
* 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.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
using System;
namespace NetSync
{
public class Token
{
public static int residue;
private Options options;
public Token(Options opt)
{
options = opt;
}
public void SetCompression(string fname)
{
if (!options.doCompression)
{
return;
}
}
public void SendToken(IOStream f, int token, MapFile buf, int offset, int n, int toklen)
{
if (!options.doCompression)
{
SimpleSendToken(f, token, buf, offset, n);
}
else
{
SendDeflatedToken(f, token, buf, offset, n, toklen);
}
}
public int ReceiveToken(IOStream ioStream, ref byte[] data, int offset)
{
int token;
if (!options.doCompression)
{
token = SimpleReceiveToken(ioStream, ref data, offset);
}
else
{
token = ReceiveDeflatedToken(ioStream, data, offset);
}
return token;
}
public int SimpleReceiveToken(IOStream ioStream, ref byte[] data, int offset)
{
int n;
if (residue == 0)
{
int i = ioStream.readInt();
if (i <= 0)
{
return i;
}
residue = i;
}
n = Math.Min(Match.CHUNK_SIZE, residue);
residue -= n;
data = ioStream.ReadBuffer(n);
return n;
}
public int ReceiveDeflatedToken(IOStream f, byte[] data, int offset)
{
return 0;
}
public void SendDeflatedToken(IOStream f, int token, MapFile buf, int offset, int nb, int toklen)
{
}
public void SeeToken(byte[] data, int offset, int tokLen)
{
if (options.doCompression)
{
SeeDeflateToken(data, offset, tokLen);
}
}
public void SeeDeflateToken(byte[] data, int offset, int tokLen)
{
}
public void SimpleSendToken(IOStream f, int token, MapFile buf, int offset, int n)
{
if (n > 0)
{
int l = 0;
while (l < n)
{
int n1 = Math.Min(Match.CHUNK_SIZE, n - l);
f.writeInt(n1);
int off = buf.MapPtr(offset + l, n1);
f.Write(buf.p, off, n1);
l += n1;
}
}
if (token != -2)
{
f.writeInt(-(token + 1));
}
}
}
}