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// MessagePack for C++ example
//
// Copyright (C) 2017 KONDO Takatoshi
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#include <iostream>
#include <sstream>
#include <cassert>
// MSGPACK_USE_X3_PARSE should be defined before including msgpack.hpp
// It usually defined as a compiler option as -DMSGPACK_USE_X3_PARSE.
#include <msgpack.hpp>
struct json_like_visitor : msgpack::v2::null_visitor {
json_like_visitor(std::string& s):m_s(s) {}
bool visit_nil() {
m_s += "null";
return true;
}
bool visit_boolean(bool v) {
if (v) m_s += "true";
else m_s += "false";
return true;
}
bool visit_positive_integer(uint64_t v) {
std::stringstream ss;
ss << v;
m_s += ss.str();
return true;
}
bool visit_negative_integer(int64_t v) {
std::stringstream ss;
ss << v;
m_s += ss.str();
return true;
}
bool visit_float32(float v) {
std::stringstream ss;
ss << v;
m_s += ss.str();
return true;
}
bool visit_float64(double v) {
std::stringstream ss;
ss << v;
m_s += ss.str();
return true;
}
bool visit_str(const char* v, uint32_t size) {
m_s += '"' + std::string(v, size) + '"';
return true;
}
bool start_array(uint32_t /*num_elements*/) {
m_s += "[";
return true;
}
bool end_array_item() {
m_s += ",";
return true;
}
bool end_array() {
m_s.erase(m_s.size() - 1, 1); // remove the last ','
m_s += "]";
return true;
}
bool start_map(uint32_t /*num_kv_pairs*/) {
m_s += "{";
return true;
}
bool end_map_key() {
m_s += ":";
return true;
}
bool end_map_value() {
m_s += ",";
return true;
}
bool end_map() {
m_s.erase(m_s.size() - 1, 1); // remove the last ','
m_s += "}";
return true;
}
void parse_error(size_t /*parsed_offset*/, size_t /*error_offset*/) {
}
void insufficient_bytes(size_t /*parsed_offset*/, size_t /*error_offset*/) {
}
std::string& m_s;
};
int main() {
std::stringstream ss;
std::map<std::string, std::vector<int>> v1 {
{ "ABC", { 1, 2, 3 } },
{ "DEFG", { 4, 5 } }
};
std::vector<std::string> v2 {
"HIJ", "KLM", "NOP"
};
msgpack::pack(ss, v1);
msgpack::pack(ss, v2);
std::string const& buf = ss.str();
auto it = buf.begin();
auto end = buf.end();
{
std::string str;
bool ret = msgpack::parse(it, end, json_like_visitor(str));
// it is updated here.
assert(ret);
std::cout << str << std::endl;
}
{
std::string str;
bool ret = msgpack::parse(it, end, json_like_visitor(str));
// it is updated here.
assert(ret);
std::cout << str << std::endl;
}
}
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