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/*
Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012
Her Majesty the Queen in Right of Canada (Communications Research
Center Canada)
Copyright (C) 2023
Matthias P. Braendli, matthias.braendli@mpb.li
http://www.opendigitalradio.org
*/
/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <string>
#include <iostream>
#include <sstream>
#include <iomanip>
#include <string>
#include <algorithm>
#include "Json.h"
namespace json {
static std::string escape_json(const std::string &s) {
std::ostringstream o;
for (auto c = s.cbegin(); c != s.cend(); c++) {
switch (*c) {
case '"': o << "\\\""; break;
case '\\': o << "\\\\"; break;
case '\b': o << "\\b"; break;
case '\f': o << "\\f"; break;
case '\n': o << "\\n"; break;
case '\r': o << "\\r"; break;
case '\t': o << "\\t"; break;
default:
if ('\x00' <= *c && *c <= '\x1f') {
o << "\\u"
<< std::hex << std::setw(4) << std::setfill('0') << static_cast<int>(*c);
} else {
o << *c;
}
}
}
return o.str();
}
std::string map_to_json(const map_t& values) {
std::ostringstream ss;
ss << "{ ";
size_t ix = 0;
for (const auto& element : values) {
if (ix > 0) {
ss << ",";
}
ss << "\"" << escape_json(element.first) << "\": ";
ss << value_to_json(element.second);
ix++;
}
ss << " }";
return ss.str();
}
std::string value_to_json(const value_t& value)
{
std::ostringstream ss;
if (std::holds_alternative<std::string>(value.v)) {
ss << "\"" << escape_json(std::get<std::string>(value.v)) << "\"";
}
else if (std::holds_alternative<double>(value.v)) {
ss << std::fixed << std::get<double>(value.v);
}
else if (std::holds_alternative<ssize_t>(value.v)) {
ss << std::get<ssize_t>(value.v);
}
else if (std::holds_alternative<size_t>(value.v)) {
ss << std::get<size_t>(value.v);
}
else if (std::holds_alternative<bool>(value.v)) {
ss << (std::get<bool>(value.v) ? "true" : "false");
}
else if (std::holds_alternative<std::nullopt_t>(value.v)) {
ss << "null";
}
else if (std::holds_alternative<std::vector<json::value_t> >(value.v)) {
const auto& vec = std::get<std::vector<json::value_t> >(value.v);
ss << "[ ";
size_t list_ix = 0;
for (const auto& list_element : vec) {
if (list_ix > 0) {
ss << ",";
}
ss << value_to_json(list_element);
list_ix++;
}
ss << "]";
}
else if (std::holds_alternative<std::shared_ptr<json::map_t> >(value.v)) {
const map_t& v = *std::get<std::shared_ptr<json::map_t> >(value.v);
ss << map_to_json(v);
}
else {
throw std::logic_error("variant alternative not handled");
}
return ss.str();
}
}
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