/[rdesktop]/sourceforge.net/trunk/rdesktop/mppc.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 688 by n-ki, Fri Apr 30 06:18:08 2004 UTC revision 689 by n-ki, Tue May 4 09:48:45 2004 UTC
# Line 1  Line 1 
1    /* -*- c-basic-offset: 8 -*-
2       rdesktop: A Remote Desktop Protocol client.
3       Protocol services - RDP decompression
4       Copyright (C) Matthew Chapman 1999-2004
5    
6       This program is free software; you can redistribute it and/or modify
7       it under the terms of the GNU General Public License as published by
8       the Free Software Foundation; either version 2 of the License, or
9       (at your option) any later version.
10    
11       This program is distributed in the hope that it will be useful,
12       but WITHOUT ANY WARRANTY; without even the implied warranty of
13       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14       GNU General Public License for more details.
15    
16       You should have received a copy of the GNU General Public License
17       along with this program; if not, write to the Free Software
18       Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19    */
20    
21  #include <stdio.h>  #include <stdio.h>
22  #include <string.h>  #include <string.h>
23    
# Line 6  Line 26 
26  /* mppc decompression                       */  /* mppc decompression                       */
27  /* http://www.faqs.org/rfcs/rfc2118.html    */  /* http://www.faqs.org/rfcs/rfc2118.html    */
28    
29  /* TODO: research the below statements      */  /* Contacts:                                */
30    
31    /* hifn contact mentioned in the faq is     */
32    /* Robert Friend rfriend at hifn dot com    */
33    
34  /* there exists one or more patents         */  /* if you have questions regarding MPPC     */
35  /* related to compression algorithms        */  /* our contact is                           */
36    /* Guus Dhaeze  GDhaeze at hifn dot com     */
37    
38  /* since we are only decompressing I        */  /* Licensing:                               */
 /* think the end-user is safe.              */  
39    
40  /* even if that isn't true, aren't you      */  /* decompression is alright as long as we   */
41  /* already paying royalties                 */  /* don't compress data                      */
42  /* through the CAL licenses?                */  
43    /* Algorithm: */
44    
45  /* as the rfc states the algorithm seems to */  /* as the rfc states the algorithm seems to */
46  /* be LZ77 with a sliding buffer            */  /* be LZ77 with a sliding buffer            */
47  /* that is empty at init.                   */  /* that is empty at init.                   */
48    
49  /* as of my limited knowledge these patents */  /* the algorithm is called LZS and is       */
50  /* has expired.                             */  /* patented for another couple of years.    */
51    
52    /* more information is available in         */
53    /* http://www.ietf.org/ietf/IPR/hifn-ipr-draft-friend-tls-lzs-compression.txt */
54    
55    
56  RDPCOMP g_mppc_dict;  RDPCOMP g_mppc_dict;
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