4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
6 // Stefan Bund <g0dil@berlios.de>
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.
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.
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.
24 \brief VariantParser internal header */
26 #ifndef IH_VariantParser_
27 #define IH_VariantParser_ 1
30 #include "PacketParser.hh"
32 ///////////////////////////////ih.p////////////////////////////////////////
37 # define SENF_PARSE_VARIANT_TPL_ARGS_DFL(n) \
38 BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT( SENF_LIMIT_PARSE_VARIANT, \
42 # define SENF_PARSE_VARIANT_TPL_ARGS(n) BOOST_PP_ENUM_PARAMS( SENF_LIMIT_PARSE_VARIANT, n )
46 template <class Variant, unsigned N>
48 static PacketParserBase::size_type bytes(Variant const & v, unsigned n);
51 template <class Variant>
52 struct VariantBytes<Variant,0> {
53 static PacketParserBase::size_type bytes(Variant const & v, unsigned n);
58 /** \brief Internal: Variant Policy used by senf::DirectVariantParser */
59 template <class ChooserType, unsigned Distance, class Translator>
60 struct DirectVariantParser
62 typedef PacketParserBase::data_iterator data_iterator;
63 typedef PacketParserBase::state_type state_type;
64 typedef PacketParserBase::size_type size_type;
66 static size_type const init_bytes = 0;
67 size_type bytes(data_iterator i, state_type s) const { return 0; }
68 data_iterator begin(data_iterator i, state_type s) const { return i; }
70 ChooserType chooser(data_iterator i, state_type s) const {
71 return ChooserType(boost::prior(i, Distance),s);
74 unsigned variant(data_iterator i, state_type s) const {
75 return Translator::fromChooser(chooser(i,s).value());
78 void variant(unsigned v, data_iterator i, state_type s) {
79 chooser(i,s).value(Translator::toChooser(v));
83 /** \brief Internal: Identity chooser translator */
84 struct VariantParser_IdentityTranslator {
85 static unsigned fromChooser(unsigned value) { return value; }
86 static unsigned toChooser(unsigned value) { return value; }
89 # define SENF_PARSER_VARIANT_(r, data, elem) ,elem
91 # define SENF_PARSER_VARIANT_I(field, name, chooser, translator, types) \
92 typedef senf::DirectVariantParser< \
93 BOOST_PP_CAT(chooser, _t), \
94 SENF_PARSER_CURRENT_FIXED_OFFSET() - SENF_PARSER_FIXED_OFFSET(chooser), \
96 BOOST_PP_SEQ_FOR_EACH( SENF_PARSER_VARIANT_, _, types ) \
97 >::parser BOOST_PP_CAT(name, _variant_t); \
98 field( name, BOOST_PP_CAT(name, _variant_t) )
102 ///////////////////////////////ih.e////////////////////////////////////////
109 // comment-column: 40
110 // c-file-style: "senf"
111 // indent-tabs-mode: nil
112 // ispell-local-dictionary: "american"
113 // compile-command: "scons -u test"