4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
6 // The contents of this file are subject to the Fraunhofer FOKUS Public License
7 // Version 1.0 (the "License"); you may not use this file except in compliance
8 // with the License. You may obtain a copy of the License at
9 // http://senf.berlios.de/license.html
11 // The Fraunhofer FOKUS Public License Version 1.0 is based on,
12 // but modifies the Mozilla Public License Version 1.1.
13 // See the full license text for the amendments.
15 // Software distributed under the License is distributed on an "AS IS" basis,
16 // WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
17 // for the specific language governing rights and limitations under the License.
19 // The Original Code is Fraunhofer FOKUS code.
21 // The Initial Developer of the Original Code is Fraunhofer-Gesellschaft e.V.
22 // (registered association), Hansastraße 27 c, 80686 Munich, Germany.
23 // All Rights Reserved.
26 // Stefan Bund <g0dil@berlios.de>
29 \brief PacketType non-inline template implementation */
31 //#include "PacketType.ih"
36 //-/////////////////////////////////////////////////////////////////////////////////////////////////
38 //-/////////////////////////////////////////////////////////////////////////////////////////////////
39 // senf::PacketTypeMixin<Self,void>
42 prefix_ senf::PacketInterpreterBase::optional_range
43 senf::PacketTypeMixin<Self,void>::nextPacketRange(ConcretePacket<Self> const & p)
45 typename Self::size_type sz (Self::initHeadSize());
46 ///\idea This if condition could be replaced with a compile time switch by checking, whether
47 /// (the function address) Self::initHeadSize is different from PacketTypeBase::initHeadSize
48 if (sz == PacketTypeBase::size_type(-1)) {
49 typename Self::size_type headsz (bytes(p.parser()));
50 return p.data().size() < headsz ?
51 PacketTypeBase::no_range() :
52 PacketInterpreterBase::optional_range(
53 PacketTypeBase::range(boost::next(p.data().begin(), headsz),
57 // If we have a trailer, we do *not* use the 'bytes' value but initSize/initHeadSize, this
58 // is much safer since the bytes() value will probably not be very correct anyways (what
59 // should it return ? the size of the header only, the combined size of header and trailer
60 // or the size of the packet from header to trailer including payload?).
62 // So, the helper only works with fixed-size parsers if the packet has a trailer.
63 return p.data().size() < Self::initSize() ?
64 PacketTypeBase::no_range() :
65 PacketInterpreterBase::optional_range(
66 PacketTypeBase::range(boost::next(p.data().begin(),sz),
67 boost::prior(p.data().end(),Self::initSize()-sz)));
70 //-/////////////////////////////////////////////////////////////////////////////////////////////////
78 // c-file-style: "senf"
79 // indent-tabs-mode: nil
80 // ispell-local-dictionary: "american"
81 // compile-command: "scons -u test"