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https://github.com/scp-fs2open/fs2open.github.com.git
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Goober5000
e90416e199
* coverity - using `std::move` instead of copying, and change some parameters from value to reference * coverity - fix or mark potential copy-paste mistakes * coverity - various checking of parameter and return values * coverity - miscellaneous fixes, and change some 'intentional' markers to 'false positive' markers
102 lines
2.8 KiB
C++
102 lines
2.8 KiB
C++
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#include "LuaValueSerializer.h"
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#include "scripting/lua/LuaTable.h"
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namespace scripting {
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namespace util {
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LuaValueSerializer::LuaValueSerializer(luacpp::LuaValue value) : m_value(std::move(value)) {}
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SCP_vector<uint8_t> LuaValueSerializer::serialize() const
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{
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std::unique_ptr<json_t> serializedJson(toJson());
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const auto json = json_dump_string(serializedJson.get(), JSON_ENCODE_ANY | JSON_COMPACT);
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SCP_vector<uint8_t> data;
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data.reserve(json.size() + 1);
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// Add a tiny header describing the following data for future proofing.
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data.push_back(static_cast<uint8_t>(SerializationType::PlainJson));
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std::transform(json.cbegin(), json.cend(), std::back_inserter(data), [](char c) {
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return static_cast<uint8_t>(c);
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});
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return data;
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}
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json_t* LuaValueSerializer::toJson() const
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{
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switch (m_value.getValueType()) {
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case luacpp::ValueType::NIL:
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return json_null();
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case luacpp::ValueType::BOOLEAN:
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return json_boolean(m_value.getValue<bool>());
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case luacpp::ValueType::STRING: {
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const auto string = m_value.getValue<SCP_string>();
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return json_stringn(string.c_str(), string.size());
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}
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case luacpp::ValueType::NUMBER:
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return json_real(m_value.getValue<double>());
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case luacpp::ValueType::TABLE:
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return tableToJson();
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case luacpp::ValueType::NONE:
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case luacpp::ValueType::USERDATA:
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case luacpp::ValueType::FUNCTION:
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case luacpp::ValueType::LIGHTUSERDATA:
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case luacpp::ValueType::THREAD:
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default:
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throw std::runtime_error("Unsupported value type!");
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}
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}
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json_t* LuaValueSerializer::tableToJson() const
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{
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luacpp::LuaTable tableVal;
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tableVal.setReference(m_value.getReference());
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auto testVal = tableVal.getValue<luacpp::LuaValue>(1);
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if (testVal.getValueType() == luacpp::ValueType::NIL) {
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// If there is no first array element then we assume it is an object
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return tableToJsonObject(tableVal);
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} else {
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// Assume this is an object
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return tableToJsonArray(tableVal);
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}
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}
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json_t* LuaValueSerializer::tableToJsonArray(const luacpp::LuaTable& table)
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{
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auto size = table.getLength();
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auto jsonArray = json_array();
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for (size_t i = 1; i <= size; ++i) {
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luacpp::LuaValue arrayVal;
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if (!table.getValue(i, arrayVal)) {
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json_array_append_new(jsonArray, json_null());
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} else {
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LuaValueSerializer valueSerializer(std::move(arrayVal));
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json_array_append_new(jsonArray, valueSerializer.toJson());
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}
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}
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return jsonArray;
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}
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json_t* LuaValueSerializer::tableToJsonObject(const luacpp::LuaTable& table)
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{
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auto jsonObj = json_object();
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for (const auto& entry : table) {
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if (entry.first.getValueType() != luacpp::ValueType::STRING) {
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// Ignore non-string indices
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continue;
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}
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const auto index = entry.first.getValue<SCP_string>();
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LuaValueSerializer valueSerializer(entry.second);
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json_object_set_new(jsonObj, index.c_str(), valueSerializer.toJson());
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}
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return jsonObj;
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}
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} // namespace util
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} // namespace scripting
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