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_SENF_Packets_VariantParser_
27 #define IH_SENF_Packets_VariantParser_ 1
30 #include "PacketParser.hh"
31 #include <boost/preprocessor/cat.hpp>
32 #include <boost/preprocessor/seq/enum.hpp>
33 #include <boost/preprocessor/seq/fold_left.hpp>
34 #include <boost/preprocessor/seq/for_each.hpp>
35 #include <boost/preprocessor/logical/or.hpp>
36 #include <boost/preprocessor/seq/for_each_i.hpp>
37 #include <boost/preprocessor/logical/not.hpp>
38 #include <boost/preprocessor/expr_if.hpp>
40 ///////////////////////////////ih.p////////////////////////////////////////
47 template <class Variant, unsigned N>
49 static PacketParserBase::size_type bytes(Variant const & v, unsigned n);
52 template <class Variant>
53 struct VariantBytes<Variant,0> {
54 static PacketParserBase::size_type bytes(Variant const & v, unsigned n);
57 template <class Transform, class AuxPolicy, class AuxTag>
58 struct VariantParserPolicy;
60 template <class AuxPolicy, class AuxTag>
61 struct VariantParserPolicy<void, AuxPolicy, AuxTag>
64 template <class Transform, class AuxPolicy, class AuxTag>
65 struct VariantParserPolicy
66 : public VariantParserPolicy< void,
67 TransformAuxParserPolicy<AuxPolicy, Transform>, AuxTag >
70 template <class AuxPolicy>
71 struct VariantParserPolicy<void, AuxPolicy, senf::detail::auxtag::none>
73 typedef AuxPolicy type;
76 template <class AuxPolicy, class Transform>
77 struct VariantParserPolicy<void,
79 senf::detail::auxtag::transform<Transform,
80 senf::detail::auxtag::none> >
82 typedef TransformAuxParserPolicy<AuxPolicy, Transform> type;
85 template <class Parsers, class Transform>
86 struct VariantParserTraits
88 template <class AuxPolicy, class AuxTag>
90 typedef senf::VariantParser<
91 typename VariantParserPolicy<Transform, AuxPolicy, AuxTag>::type,
96 template <class T, T (*KeyFn)()>
99 static T key() { return (*KeyFn)(); }
102 template <class T, class Keys>
103 struct VariantKeyTransform
105 typedef unsigned value_type;
106 typedef T input_type;
107 static unsigned get(input_type v);
108 static input_type set(unsigned v);
111 template <class In, class Out, class Keys, unsigned N>
112 struct VariantKeyTransformCheck
114 static Out get(In v);
115 static In set(Out v);
118 template <class In, class Out, class Keys>
119 struct VariantKeyTransformCheck<In, Out, Keys, 0>
121 static Out get(In v);
122 static In set(Out v);
125 # define SENF_PARSER_VARIANT_I(access, name, chooser, types) \
126 SENF_PARSER_REQUIRE_VAR(variant) \
128 typedef boost::mpl::vector< BOOST_PP_SEQ_ENUM(SENF_PARSER_VARIANT_TYPES(types)) > \
129 BOOST_PP_CAT(name, _parsers); \
130 typedef BOOST_PP_CAT(SENF_PARSER_COLLECTION_GETAUX(chooser), _t)::value_type \
131 BOOST_PP_CAT(name,_chooser_value_type); \
132 BOOST_PP_IF( SENF_PARSER_VARIANT_NEEDTRANSFORM(types), \
133 SENF_PARSER_VARIANT_MAKETRANSFORM, \
134 SENF_PARSER_VARIANT_NOTRANSFORM )(name, \
136 typedef senf::detail::VariantParserTraits< BOOST_PP_CAT(name, _parsers), \
137 BOOST_PP_CAT(name, _transform) > \
138 BOOST_PP_CAT(name, _traits); \
140 SENF_PARSER_COLLECTION_I( \
141 BOOST_PP_IIF( SENF_PARSER_VARIANT_NEEDACCESSORS(types), private, access), \
142 name, chooser, BOOST_PP_CAT(name, _traits) ); \
144 BOOST_PP_SEQ_FOR_EACH_I(SENF_PARSER_VARIANT_ACCESSOR, name, types) \
147 # define SENF_PARSER_VARIANT_MAKETRANSFORM(name, types) \
148 BOOST_PP_SEQ_FOR_EACH_I(SENF_PARSER_VARIANT_KEYVALUE, name, types) \
149 template <BOOST_PP_CAT(name, _chooser_value_type) (*KeyFn)()> \
150 struct BOOST_PP_CAT(name, _key_value_template) \
151 : public senf::detail::VariantKey<BOOST_PP_CAT(name, _chooser_value_type), KeyFn> {}; \
152 template <class T, T (*K)()> friend class senf::detail::VariantKey; \
153 typedef senf::detail::VariantKeyTransform< \
154 BOOST_PP_CAT(name,_chooser_value_type), \
155 boost::mpl::vector< \
156 BOOST_PP_SEQ_ENUM(SENF_PARSER_VARIANT_KEYVALUES(name, types)) \
157 > > BOOST_PP_CAT(name, _transform);
159 # define SENF_PARSER_VARIANT_KEYVALUE(r, name, i, elem) \
160 static BOOST_PP_CAT(name, _chooser_value_type) \
161 BOOST_PP_CAT(BOOST_PP_CAT(name, _key_),i)() \
162 { return SENF_PARSER_VARIANT_GETKEY(elem, i); }
164 # define SENF_PARSER_VARIANT_NOTRANSFORM(name, types) \
165 typedef void BOOST_PP_CAT(name, _transform);
167 # define SENF_PARSER_VARIANT_KEYVALUES(name, types) \
168 BOOST_PP_SEQ_FOR_EACH_I(SENF_PARSER_VARIANT_KEYVALUES_, name, types)
170 # define SENF_PARSER_VARIANT_KEYVALUES_(r, name, i, elem) \
171 (BOOST_PP_CAT(name,_key_value_template)< \
172 & BOOST_PP_CAT(BOOST_PP_CAT(name, _key_), i) >)
174 # define SENF_PARSER_VARIANT_ACCESSOR(r, name, i, elem) \
175 BOOST_PP_IF( SENF_PARSER_VARIANT_HASID(elem), \
176 SENF_PARSER_VARIANT_MAKEACCESSOR, \
177 SENF_PARSER_VARIANT_NOACCESSOR )(name, i, elem)
179 # define SENF_PARSER_VARIANT_NOACCESSOR(name, i, elem)
180 # define SENF_PARSER_VARIANT_MAKEACCESSOR(name, i, elem) \
181 SENF_PARSER_VARIANT_MAKEACCESSOR_VALUE(name, i, elem, SENF_PARSER_VARIANT_GETID(elem)) \
182 SENF_PARSER_VARIANT_MAKEACCESSOR_HAS(name, i, elem, SENF_PARSER_VARIANT_GETHASID(elem)) \
183 SENF_PARSER_VARIANT_MAKEACCESSOR_INIT(name, i, elem, SENF_PARSER_VARIANT_GETINITID(elem))
185 # define SENF_PARSER_VARIANT_IFNOTNA(id, x) \
186 BOOST_PP_EXPR_IIF( BOOST_PP_NOT( SENF_PARSER_VARIANT_NA(id) ), x )
188 # define SENF_PARSER_VARIANT_MAKEACCESSOR_VALUE(name, i, elem, id) \
189 SENF_PARSER_VARIANT_IFNOTNA( id, \
190 typedef SENF_PARSER_VARIANT_GETTYPE(elem) \
191 BOOST_PP_CAT(id, _t); \
192 BOOST_PP_CAT(id, _t) id() const \
193 { return name().get<i>(); } \
196 # define SENF_PARSER_VARIANT_MAKEACCESSOR_HAS(name, i, elem, id) \
197 SENF_PARSER_VARIANT_IFNOTNA( id, \
199 { return name().variant() == i; } \
202 # define SENF_PARSER_VARIANT_MAKEACCESSOR_INIT(name, i, elem, id) \
203 SENF_PARSER_VARIANT_IFNOTNA( id, \
205 { name().init<i>(); } \
208 # define SENF_PARSER_VARIANT_KEY_GOBBLE__key(key, type)
209 # define SENF_PARSER_VARIANT_KEY_GETKEY__key(key, type) key
210 # define SENF_PARSER_VARIANT_KEY_GETTYPE__key(key, type) type
212 # define SENF_PARSER_VARIANT_ID_GOBBLE__id(id, value)
213 # define SENF_PARSER_VARIANT_ID_GETID__id(id, value) id
214 # define SENF_PARSER_VARIANT_ID_GETVALUE__id(id, value) value
215 # define SENF_PARSER_VARIANT_ID_GETHASID__id(id, value) SENF_CAT_RECURS3(has_, id)
216 # define SENF_PARSER_VARIANT_ID_GETINITID__id(id, value) SENF_CAT_RECURS3(init_, id)
218 # define SENF_PARSER_VARIANT_ID_GOBBLE__novalue(id, value)
219 # define SENF_PARSER_VARIANT_ID_GETID__novalue(id, value) na
220 # define SENF_PARSER_VARIANT_ID_GETVALUE__novalue(id, value) value
221 # define SENF_PARSER_VARIANT_ID_GETHASID__novalue(id, value) na
222 # define SENF_PARSER_VARIANT_ID_GETINITID__novalue(id, value) id
224 # define SENF_PARSER_VARIANT_ID_GOBBLE__ids(id, hasid, initid, value)
225 # define SENF_PARSER_VARIANT_ID_GETID__ids(id, hasid, initid, value) id
226 # define SENF_PARSER_VARIANT_ID_GETVALUE__ids(id, hasid, initid, value) value
227 # define SENF_PARSER_VARIANT_ID_GETHASID__ids(id, hasid, initid, value) hasid
228 # define SENF_PARSER_VARIANT_ID_GETINITID__ids(id, hasid, initid, value) initid
230 # define SENF_PARSER_VARIANT_NA_GOBBLE__na
232 # define SENF_PARSER_VARIANT_NA(x) \
233 BOOST_PP_IS_EMPTY( SENF_CAT_RECURS1(SENF_PARSER_VARIANT_NA_GOBBLE__, x) )
235 # define SENF_PARSER_VARIANT_HASKEY(x) \
236 SENF_PARSER_VARIANT_HASKEY_( SENF_PARSER_VARIANT_GETVALUE(x) )
238 # define SENF_PARSER_VARIANT_HASKEY_(x) \
239 BOOST_PP_IS_EMPTY( SENF_CAT_RECURS1(SENF_PARSER_VARIANT_KEY_GOBBLE__, x) )
241 # define SENF_PARSER_VARIANT_GETKEY(x, default) \
242 SENF_PARSER_VARIANT_GETKEY_( SENF_PARSER_VARIANT_GETVALUE(x), default )
244 # define SENF_PARSER_VARIANT_GETKEY_(x, default) \
245 BOOST_PP_IF( SENF_PARSER_VARIANT_HASKEY_(x), \
246 BOOST_PP_CAT(SENF_PARSER_VARIANT_KEY_GETKEY__, x), \
249 # define SENF_PARSER_VARIANT_HASID(x) \
250 BOOST_PP_IS_EMPTY( SENF_CAT_RECURS2(SENF_PARSER_VARIANT_ID_GOBBLE__, x) )
252 # define SENF_PARSER_VARIANT_GETID(x) \
253 BOOST_PP_CAT(SENF_PARSER_VARIANT_ID_GETID__, x)
255 # define SENF_PARSER_VARIANT_GETHASID(x) \
256 BOOST_PP_CAT(SENF_PARSER_VARIANT_ID_GETHASID__, x)
258 # define SENF_PARSER_VARIANT_GETINITID(x) \
259 BOOST_PP_CAT(SENF_PARSER_VARIANT_ID_GETINITID__, x)
261 # define SENF_PARSER_VARIANT_GETVALUE(x) \
262 BOOST_PP_IF( SENF_PARSER_VARIANT_HASID(x), \
263 BOOST_PP_CAT(SENF_PARSER_VARIANT_ID_GETVALUE__, x), \
266 # define SENF_PARSER_VARIANT_GETTYPE(x) \
267 SENF_PARSER_VARIANT_GETTYPE_( SENF_PARSER_VARIANT_GETVALUE(x) )
269 # define SENF_PARSER_VARIANT_GETTYPE_(x) \
270 BOOST_PP_IF( SENF_PARSER_VARIANT_HASKEY_(x), \
271 BOOST_PP_CAT(SENF_PARSER_VARIANT_KEY_GETTYPE__, x), \
274 # define SENF_PARSER_VARIANT_NEEDTRANSFORM(types) \
275 BOOST_PP_SEQ_FOLD_LEFT(SENF_PARSER_VARIANT_NEEDTRANSFORM_, 0, types)
277 # define SENF_PARSER_VARIANT_NEEDTRANSFORM_(s, state, elem) \
278 BOOST_PP_OR(state, SENF_PARSER_VARIANT_HASKEY(elem))
280 # define SENF_PARSER_VARIANT_NEEDACCESSORS(types) \
281 BOOST_PP_SEQ_FOLD_LEFT(SENF_PARSER_VARIANT_NEEDACCESSORS_, 0, types)
283 # define SENF_PARSER_VARIANT_NEEDACCESSORS_(s, state, elem) \
284 BOOST_PP_OR(state, SENF_PARSER_VARIANT_HASID(elem))
286 # define SENF_PARSER_VARIANT_TYPES(types) \
287 BOOST_PP_SEQ_FOR_EACH(SENF_PARSER_VARIANT_TYPES_, _, types)
289 # define SENF_PARSER_VARIANT_TYPES_(r, _, elem) \
290 (SENF_PARSER_VARIANT_GETTYPE(elem))
296 ///////////////////////////////ih.e////////////////////////////////////////
303 // comment-column: 40
304 // c-file-style: "senf"
305 // indent-tabs-mode: nil
306 // ispell-local-dictionary: "american"
307 // compile-command: "scons -u test"