Touch Designer が日本語うけとれないらしいので？、文字列をutf16 ascii char に変換 in cpp

convert-from-utf8str-to-utf16-ascii-char.cpp

#include <iostream>
#include <codecvt>
#include <sstream>

// https://onlineutf8tools.com/convert-utf8-to-utf16
// https://cpprefjp.github.io/lang/cpp11/char16_32.html

using namespace std;

class ConvertUtils
{
public:
    static std::string ConvertAsciiChar(std::string str)
    {
        wstring_convert<std::codecvt_utf8<char16_t>, char16_t> converter;
        u16string u16str = converter.from_bytes(str);
        
        stringstream ss;
        for (char16_t c : u16str)
        {
            ss << std::hex << std::showbase << c;
        }
        return ConvertUtils::replaceString(ss.str(),"0x","\\u");
    }
    
private:
    static std::string replaceString(std::string str1, std::string str2,std::string str3)
    {
        std::string::size_type pos( str1.find( str2 ) );
        
        while( pos != std::string::npos )
        {
            str1.replace( pos, str2.length(), str3 );
            pos = str1.find( str2, pos + str3.length() );
        }
        return str1;
    }
};

int main(int argc, const char * argv[])
{
    string srcStr = "あい";
    string resultSrc = ConvertUtils::ConvertAsciiChar(srcStr);
    cout << resultSrc << endl;
}