Function escape_json

tests/test_utils.cpp:252–264

}

std::string escape_json(const std::string& s) {
    std::ostringstream o;
    for (auto c : s) {
        switch (c) {
            case '"':  o << "\\\""; break;
            case '\\': o << "\\\\"; break;
            case '\n': o << "\\n";  break;
            case '\r': o << "\\r";  break;
            default:   o << c;      break;
        }
    }
    return o.str();
}

void stream_callback(const char* token, uint32_t token_id, void* user_data) {
    auto* data = static_cast<StreamingData*>(user_data);