udpstream.h
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1 /*
2  * Copyright (C) 2005 Tommi Maekitalo
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * As a special exception, you may use this file as part of a free
10  * software library without restriction. Specifically, if other files
11  * instantiate templates or use macros or inline functions from this
12  * file, or you compile this file and link it with other files to
13  * produce an executable, this file does not by itself cause the
14  * resulting executable to be covered by the GNU General Public
15  * License. This exception does not however invalidate any other
16  * reasons why the executable file might be covered by the GNU Library
17  * General Public License.
18  *
19  * This library is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22  * Lesser General Public License for more details.
23  *
24  * You should have received a copy of the GNU Lesser General Public
25  * License along with this library; if not, write to the Free Software
26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27  */
28 
29 #ifndef CXXTOOLS_UDPSTREAM_H
30 #define CXXTOOLS_UDPSTREAM_H
31 
32 #include <cxxtools/net/udp.h>
33 #include <iostream>
34 
35 namespace cxxtools
36 {
37  namespace net
38  {
39  class UdpStreambuf : public std::streambuf
40  {
41  char* message;
42  unsigned msgsize;
43  UdpSender& sender;
44  int flags;
45 
46  void sendBuffer();
47 
48  public:
49  explicit UdpStreambuf(UdpSender& sender_, int flags_ = 0, unsigned msgsize_ = 1024)
50  : message(new char[msgsize_]),
51  msgsize(msgsize_),
52  sender(sender_),
53  flags(flags_)
54  { }
56  { delete[] message; }
57 
58  protected:
59  std::streambuf::int_type overflow(std::streambuf::int_type ch);
60  std::streambuf::int_type underflow();
61  int sync();
62  };
63 
64  class UdpOStream : public std::ostream
65  {
66  UdpSender* sender;
67  UdpStreambuf streambuf;
68 
69  public:
70  explicit UdpOStream(UdpSender& sender_, int flags = 0)
71  : std::ostream(0),
72  sender(0),
73  streambuf(sender_, flags)
74  {
75  init(&streambuf);
76  }
77  UdpOStream(const char* ipaddr, unsigned short int port, bool bcast = false,
78  int flags = 0)
79  : std::ostream(0),
80  sender(new UdpSender(ipaddr, port, bcast)),
81  streambuf(*sender, flags)
82  {
83  init(&streambuf);
84  }
86  { delete sender; }
87  };
88 
89  } // namespace net
90 
91 } // namespace cxxtools
92 
93 #endif // CXXTOOLS_UDPSTREAM_H