msgpack/erb/cpp03_define_map.hpp.erb

//
// MessagePack for C++ static resolution routine
//
// Copyright (C) 2015 KONDO Takatoshi
//
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
//
//        http://www.apache.org/licenses/LICENSE-2.0
//
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
//
#ifndef MSGPACK_CPP03_DEFINE_MAP_HPP
#define MSGPACK_CPP03_DEFINE_MAP_HPP

// BOOST_PP_VARIADICS is defined in boost/preprocessor/config/config.hpp
// http://www.boost.org/libs/preprocessor/doc/ref/variadics.html
// However, supporting compiler detection is not complete. msgpack-c requires
// variadic macro arguments support. So BOOST_PP_VARIADICS is defined here explicitly.
#if !defined(MSGPACK_PP_VARIADICS)
#define MSGPACK_PP_VARIADICS
#endif

#include <msgpack/preprocessor.hpp>

#include "msgpack/versioning.hpp"
#include "msgpack/adaptor/msgpack_tuple.hpp"
#include "msgpack/adaptor/adaptor_base.hpp"
#include "msgpack/object_fwd.hpp"

#define MSGPACK_DEFINE_MAP_EACH_PROC(r, data, elem) \
    MSGPACK_PP_IF( \
        MSGPACK_PP_IS_BEGIN_PARENS(elem), \
        elem, \
        (MSGPACK_PP_STRINGIZE(elem))(elem) \
    )

#define MSGPACK_DEFINE_MAP_IMPL(...) \
    MSGPACK_PP_SEQ_TO_TUPLE( \
        MSGPACK_PP_SEQ_FOR_EACH( \
            MSGPACK_DEFINE_MAP_EACH_PROC, \
            0, \
            MSGPACK_PP_VARIADIC_TO_SEQ(__VA_ARGS__) \
        ) \
    )

#define MSGPACK_DEFINE_MAP(...) \
    template <typename Packer> \
    void msgpack_pack(Packer& pk) const \
    { \
        msgpack::type::make_define_map \
            MSGPACK_DEFINE_MAP_IMPL(__VA_ARGS__) \
            .msgpack_pack(pk); \
    } \
    void msgpack_unpack(msgpack::object const& o) \
    { \
        msgpack::type::make_define_map \
            MSGPACK_DEFINE_MAP_IMPL(__VA_ARGS__) \
            .msgpack_unpack(o); \
    }\
    template <typename MSGPACK_OBJECT> \
    void msgpack_object(MSGPACK_OBJECT* o, msgpack::zone& z) const \
    { \
        msgpack::type::make_define_map \
            MSGPACK_DEFINE_MAP_IMPL(__VA_ARGS__) \
            .msgpack_object(o, z); \
    }

#define MSGPACK_BASE_MAP(base) \
    (MSGPACK_PP_STRINGIZE(base))(*const_cast<base *>(static_cast<base const*>(this)))

namespace msgpack {
/// @cond
MSGPACK_API_VERSION_NAMESPACE(v1) {
/// @endcond
namespace type {

/// @cond
<% GENERATION_LIMIT = 31 %>
template <typename A0 = void<%1.upto(GENERATION_LIMIT+1) {|i|%>, typename A<%=i%> = void<%}%>>
struct define_map;
/// @endcond

template <>
struct define_map<> {
    template <typename Packer>
    void msgpack_pack(Packer& pk) const
    {
        pk.pack_map(0);
    }
    void msgpack_unpack(msgpack::object const& o) const
    {
        if(o.type != msgpack::type::MAP) { throw msgpack::type_error(); }
    }
    void msgpack_object(msgpack::object* o, msgpack::zone&) const
    {
        o->type = msgpack::type::MAP;
        o->via.map.ptr = nullptr;
        o->via.map.size = 0;
    }
};

/// @cond
<%1.step(GENERATION_LIMIT+1,2) {|i|%>
template <typename A0<%1.upto(i) {|j|%>, typename A<%=j%><%}%>>
struct define_map<A0<%1.upto(i) {|j|%>, A<%=j%><%}%>> {
    define_map(A0& _a0<%1.upto(i) {|j|%>, A<%=j%>& _a<%=j%><%}%>) :
        a0(_a0)<%1.upto(i) {|j|%>, a<%=j%>(_a<%=j%>)<%}%> {}
    template <typename Packer>
    void msgpack_pack(Packer& pk) const
    {
        pk.pack_map(<%=(i+1)/2%>);
        <%0.upto(i) {|j|%>
        pk.pack(a<%=j%>);<%}%>
    }
    void msgpack_unpack(msgpack::object const& o) const
    {
        if(o.type != msgpack::type::MAP) { throw msgpack::type_error(); }
        std::map<std::string, msgpack::object const*> kvmap;
        for (uint32_t i = 0; i < o.via.map.size; ++i) {
            kvmap.insert(
                std::map<std::string, msgpack::object const*>::value_type(
                    std::string(
                        o.via.map.ptr[i].key.via.str.ptr,
                        o.via.map.ptr[i].key.via.str.size),
                    &o.via.map.ptr[i].val
                )
            );
        }
        <%0.step(i,2) {|j|%>
        {
            std::map<std::string, msgpack::object const*>::const_iterator it = kvmap.find(a<%=j%>);
            if (it != kvmap.end()) {
                it->second->convert(a<%=j+1%>);
            }
        }
        <%}%>
    }
    void msgpack_object(msgpack::object* o, msgpack::zone& z) const
    {
        o->type = msgpack::type::MAP;
        o->via.map.ptr = static_cast<msgpack::object_kv*>(z.allocate_align(sizeof(msgpack::object_kv)*<%=(i+1)/2%>));
        o->via.map.size = <%=(i+1)/2%>;
        <%0.step(i,2) {|j|%>
        o->via.map.ptr[<%=j/2%>].key = msgpack::object(a<%=j%>, z);
        o->via.map.ptr[<%=j/2%>].val = msgpack::object(a<%=j+1%>, z);
        <%}%>
    }
    <%0.upto(i) {|j|%>
    A<%=j%>& a<%=j%>;<%}%>
};
<%}%>
/// @endcond

inline define_map<> make_define_map()
{
    return define_map<>();
}

/// @cond
<%0.upto(GENERATION_LIMIT) {|i|%>
template <typename A0<%1.upto(i) {|j|%>, typename A<%=j%><%}%>>
inline define_map<A0<%1.upto(i) {|j|%>, A<%=j%><%}%>> make_define_map(A0& a0<%1.upto(i) {|j|%>, A<%=j%>& a<%=j%><%}%>)
{
    return define_map<A0<%1.upto(i) {|j|%>, A<%=j%><%}%>>(a0<%1.upto(i) {|j|%>, a<%=j%><%}%>);
}
<%}%>
/// @endcond

}  // namespace type
/// @cond
}  // MSGPACK_API_VERSION_NAMESPACE(v1)
/// @endcond
}  // namespace msgpack

#endif // MSGPACK_CPP03_DEFINE_MAP_HPP