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https://github.com/msgpack/msgpack-c.git
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ba15089d86
Updated the license from the license from the Apache License Version 2.0 to the Boost Software License, Version 1.0. Removed unused files.
119 lines
3.3 KiB
C++
119 lines
3.3 KiB
C++
// MessagePack for C++ example
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//
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// Copyright (C) 2008-2015 FURUHASHI Sadayuki and KONDO Takatoshi
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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#include <string>
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#include <iostream>
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#include <iomanip>
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#include <sstream>
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#include <cassert>
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#include <msgpack.hpp>
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class my_class {
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public:
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my_class() {} // When you want to convert from msgpack::object to my_class,
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// my_class should be default constractible.
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my_class(std::string const& name, int age):name_(name), age_(age) {}
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// my_class should provide getters for the data members you want to pack.
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std::string const& get_name() const { return name_; }
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int get_age() const { return age_; }
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friend bool operator==(my_class const& lhs, my_class const& rhs) {
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return lhs.name_ == rhs.name_ && lhs.age_ == rhs.age_;
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}
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private:
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std::string name_;
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int age_;
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};
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// User defined class template specialization
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namespace msgpack {
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MSGPACK_API_VERSION_NAMESPACE(MSGPACK_DEFAULT_API_NS) {
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namespace adaptor {
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template<>
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struct convert<my_class> {
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msgpack::object const& operator()(msgpack::object const& o, my_class& v) const {
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if (o.type != msgpack::type::ARRAY) throw msgpack::type_error();
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if (o.via.array.size != 2) throw msgpack::type_error();
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v = my_class(
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o.via.array.ptr[0].as<std::string>(),
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o.via.array.ptr[1].as<int>());
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return o;
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}
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};
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template<>
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struct pack<my_class> {
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template <typename Stream>
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packer<Stream>& operator()(msgpack::packer<Stream>& o, my_class const& v) const {
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// packing member variables as an array.
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o.pack_array(2);
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o.pack(v.get_name());
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o.pack(v.get_age());
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return o;
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}
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};
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template <>
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struct object_with_zone<my_class> {
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void operator()(msgpack::object::with_zone& o, my_class const& v) const {
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o.type = type::ARRAY;
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o.via.array.size = 2;
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o.via.array.ptr = static_cast<msgpack::object*>(
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o.zone.allocate_align(sizeof(msgpack::object) * o.via.array.size));
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o.via.array.ptr[0] = msgpack::object(v.get_name(), o.zone);
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o.via.array.ptr[1] = msgpack::object(v.get_age(), o.zone);
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}
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};
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} // namespace adaptor
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} // MSGPACK_API_VERSION_NAMESPACE(MSGPACK_DEFAULT_API_NS)
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} // namespace msgpack
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void print(std::string const& buf) {
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for (std::string::const_iterator it = buf.begin(), end = buf.end();
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it != end;
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++it) {
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std::cout
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<< std::setw(2)
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<< std::hex
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<< std::setfill('0')
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<< (static_cast<int>(*it) & 0xff)
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<< ' ';
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}
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std::cout << std::dec << std::endl;
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}
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int main() {
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{ // pack, unpack
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my_class my("John Smith", 42);
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std::stringstream ss;
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msgpack::pack(ss, my);
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print(ss.str());
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msgpack::unpacked unp;
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msgpack::unpack(unp, ss.str().data(), ss.str().size());
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msgpack::object obj = unp.get();
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std::cout << obj << std::endl;
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assert(obj.as<my_class>() == my);
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}
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{ // create object with zone
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my_class my("John Smith", 42);
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msgpack::zone z;
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msgpack::object obj(my, z);
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std::cout << obj << std::endl;
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assert(obj.as<my_class>() == my);
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}
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}
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