Packets: Add nestet transform/bytes auxtag support
[senf.git] / Packets / VectorParser.ih
1 // $Id$
2 //
3 // Copyright (C) 2007
4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
6 //     Stefan Bund <g0dil@berlios.de>
7 //
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 2 of the License, or
11 // (at your option) any later version.
12 //
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 // GNU General Public License for more details.
17 //
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the
20 // Free Software Foundation, Inc.,
21 // 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
22
23 /** \file
24     \brief VectorParser internal header */
25
26 #ifndef IH_VectorParser_
27 #define IH_VectorParser_ 1
28
29 // Custom includes
30
31 ///////////////////////////////ih.p////////////////////////////////////////
32
33 namespace senf {
34 namespace detail {
35
36 #   define SENF_PARSER_VEC_N_I(field, name, size, elt_type)                                       \
37         typedef senf::VectorParser<                                                               \
38             elt_type,                                                                             \
39             senf::detail::FixedAuxParserPolicy< BOOST_PP_CAT(size, _t),                           \
40                                                 SENF_PARSER_CURRENT_FIXED_OFFSET()                \
41                                                     - SENF_PARSER_FIXED_OFFSET(size) >            \
42         > BOOST_PP_CAT(name, _vec_t);                                                             \
43         field( name, BOOST_PP_CAT(name, _vec_t) )
44
45     template <class ElementParser, class AuxPolicy, class AuxTag>
46     struct VectorParserPolicy
47     {};
48
49     template <class ElementParser, class AuxPolicy>
50     struct VectorParserPolicy<ElementParser, AuxPolicy, senf::detail::auxtag::none>
51     {
52         typedef AuxPolicy type;
53     };
54
55     template <class ElementParser, class AuxPolicy, class Transform>
56     struct VectorParserPolicy<ElementParser, AuxPolicy, 
57                               senf::detail::auxtag::transform<Transform,
58                                                               senf::detail::auxtag::none> >
59     {
60         typedef senf::detail::TransformAuxParserPolicy<AuxPolicy, Transform> type;
61     };
62
63     template <unsigned fixedSize>
64     struct VectorParserBytesTransform
65     {
66         typedef PacketParserBase::size_type value_type;
67         static value_type get(value_type v) { return v/fixedSize; }
68         static value_type set(value_type v) { return v*fixedSize; }
69     };
70
71     template <class ElementParser, class AuxPolicy>
72     struct VectorParserPolicy<ElementParser, AuxPolicy, senf::detail::auxtag::bytes>
73     {
74         typedef senf::detail::TransformAuxParserPolicy<
75             AuxPolicy, 
76             VectorParserBytesTransform<ElementParser::fixed_bytes> > type;
77     };
78
79     template <class ElementParser>
80     struct VectorParserTraits
81     {
82         template <class AuxPolicy, class AuxTag>
83         struct parser {
84             typedef senf::VectorParser<
85                 ElementParser, 
86                 typename VectorParserPolicy<ElementParser, AuxPolicy, AuxTag>::type > type;
87         };
88     };
89
90
91 #   define SENF_PARSER_VECTOR_I(access, name, size, elt_type)                                     \
92         SENF_PARSER_REQUIRE_VAR(vector)                                                           \
93         SENF_PARSER_COLLECTION_I( access,                                                         \
94                                   name,                                                           \
95                                   size,                                                           \
96                                   senf::detail::VectorParserTraits<elt_type> )
97
98 }}
99                               
100 ///////////////////////////////ih.e////////////////////////////////////////
101 #endif
102
103 \f
104 // Local Variables:
105 // mode: c++
106 // fill-column: 100
107 // comment-column: 40
108 // c-file-style: "senf"
109 // indent-tabs-mode: nil
110 // ispell-local-dictionary: "american"
111 // compile-command: "scons -u test"
112 // End: