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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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>
34 NetChat::setTerminator(const std::string& t)
41 NetChat::getTerminator() const
48 NetChat::setByteCount(int count)
51 bytesToCollect = count;
54 // return the size of the largest prefix of needle at the end
57 #define MAX(a,b) (((a)>(b))?(a):(b))
60 find_prefix_at_end(const NetBuffer& haystack, const std::string& needle)
62 const char* hd = haystack.getData();
63 int hl = haystack.getLength();
64 int nl = needle.length();
66 for (int i = MAX (nl-hl, 0); i < nl; i++) {
67 //if (haystack.compare (needle, hl-(nl-i), nl-i) == 0) {
68 if (memcmp(needle.c_str(), &hd[hl-(nl-i)], nl-i) == 0) {
76 find_terminator(const NetBuffer& haystack, const std::string& needle)
80 const char* data = haystack.getData();
81 const char* ptr = strstr(data,needle.c_str());
88 bool NetChat::push (const char* s)
90 return bufferSend ( s, strlen(s) ) ;
94 NetChat::handleBufferRead (NetBuffer& in_buffer)
96 // Continue to search for terminator in in_buffer,
97 // while calling collect_incoming_data. The while loop is
98 // necessary because we might read several data+terminator combos
99 // with a single recv().
101 while (in_buffer.getLength()) {
102 // special case where we're not using a terminator
103 if ( terminator.empty() ) {
104 if ( bytesToCollect > 0) {
105 const int toRead = std::min(in_buffer.getLength(), bytesToCollect);
106 collectIncomingData(in_buffer.getData(), toRead);
107 in_buffer.remove(0, toRead);
108 bytesToCollect -= toRead;
109 if (bytesToCollect == 0) { // read all requested bytes
112 } else { // read the whole lot
113 collectIncomingData (in_buffer.getData(),in_buffer.getLength());
120 int index = find_terminator ( in_buffer, terminator ) ;
123 // 1) end of buffer matches terminator exactly:
124 // collect data, transition
125 // 2) end of buffer matches some prefix:
126 // collect data to the prefix
127 // 3) end of buffer does not match any prefix:
131 // we found the terminator
132 collectIncomingData ( in_buffer.getData(), index ) ;
133 in_buffer.remove (0, index + terminator.length());
136 // check for a prefix of the terminator
137 int num = find_prefix_at_end (in_buffer, terminator);
139 int bl = in_buffer.getLength();
140 // we found a prefix, collect up to the prefix
141 collectIncomingData ( in_buffer.getData(), bl - num ) ;
142 in_buffer.remove (0, bl - num);
145 // no prefix, collect it all
146 collectIncomingData (in_buffer.getData(), in_buffer.getLength());
153 } // of namespace simgear