2 Copied from PLIB into SimGear
4 PLIB - A Suite of Portable Game Libraries
5 Copyright (C) 1998,2002 Steve Baker
7 This library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public
9 License as published by the Free Software Foundation; either
10 version 2 of the License, or (at your option) any later version.
12 This library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
17 You should have received a copy of the GNU Library General Public
18 License along with this library; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 For further information visit http://plib.sourceforge.net
23 $Id: NetChat.cxx 2117 2007-09-13 23:21:09Z fayjf $
26 #include <simgear/io/sg_netChat.hxx>
28 #include <cstring> // for strdup
33 NetChat::setTerminator (const char* t)
35 if (terminator) delete[] terminator;
36 terminator = strdup(t);
40 NetChat::getTerminator (void)
45 // return the size of the largest prefix of needle at the end
48 #define MAX(a,b) (((a)>(b))?(a):(b))
51 find_prefix_at_end (const NetBuffer& haystack, const char* needle)
53 const char* hd = haystack.getData();
54 int hl = haystack.getLength();
55 int nl = strlen(needle);
57 for (int i = MAX (nl-hl, 0); i < nl; i++) {
58 //if (haystack.compare (needle, hl-(nl-i), nl-i) == 0) {
59 if (memcmp(needle, &hd[hl-(nl-i)], nl-i) == 0) {
67 find_terminator (const NetBuffer& haystack, const char* needle)
69 if (needle && *needle)
71 const char* data = haystack.getData();
72 const char* ptr = strstr(data,needle);
79 bool NetChat::push (const char* s)
81 return bufferSend ( s, strlen(s) ) ;
85 NetChat::handleBufferRead (NetBuffer& in_buffer)
87 // Continue to search for terminator in in_buffer,
88 // while calling collect_incoming_data. The while loop is
89 // necessary because we might read several data+terminator combos
90 // with a single recv().
92 while (in_buffer.getLength()) {
94 // special case where we're not using a terminator
95 if (terminator == 0 || *terminator == 0) {
96 collectIncomingData (in_buffer.getData(),in_buffer.getLength());
101 int terminator_len = strlen(terminator);
103 int index = find_terminator ( in_buffer, terminator ) ;
106 // 1) end of buffer matches terminator exactly:
107 // collect data, transition
108 // 2) end of buffer matches some prefix:
109 // collect data to the prefix
110 // 3) end of buffer does not match any prefix:
114 // we found the terminator
115 collectIncomingData ( in_buffer.getData(), index ) ;
116 in_buffer.remove (0, index + terminator_len);
119 // check for a prefix of the terminator
120 int num = find_prefix_at_end (in_buffer, terminator);
122 int bl = in_buffer.getLength();
123 // we found a prefix, collect up to the prefix
124 collectIncomingData ( in_buffer.getData(), bl - num ) ;
125 in_buffer.remove (0, bl - num);
128 // no prefix, collect it all
129 collectIncomingData (in_buffer.getData(), in_buffer.getLength());
136 } // of namespace simgear