wstring to hex, hex to wstring

wstring2hex.cpp

int encode(std::string* t, std::wstring s)
{
    std::wcout.imbue(std::locale("russian_russia.866"));
    std::wcout << L"ENCODE: строка до:\t\t" << s << std::endl;

    size_t i_len = s.length();
    std::stringstream ss;

    std::wcout << L"ENCODE: Длина строки:\t\t" << i_len << std::endl;

    ss << std::hex << std::uppercase << std::setw(2) << std::setfill('0') << i_len * 2;

    std::wcout << L"ENCODE: Необходимая длина(hex):\t" << i_len * 2 << std::endl;

    for (size_t i = 0; i < i_len; ++i)
        ss << std::hex << std::uppercase << std::setw(2) << std::setfill('0') << s[i];

    t->append(ss.str());
    std::wcout << L"ENCODE: строка после(hex):\t" << t->c_str() << std::endl;

    return (int)i_len * 2;
}


int decode(std::string s, std::wstring t)
{
    std::wcout.imbue(std::locale("russian_russia.866"));
    std::wcout << L"DECODE: строка до(hex):\t\t" << s.c_str() << std::endl;


    int i_len = 0;
    std::stringstream ss(s.substr(0, 2));
    ss >> std::hex >> i_len;

    std::wcout << L"DECODE: Длина строки(hex):\t" << i_len << std::endl;
    std::wcout << L"DECODE: Необходимая длина:\t" << i_len / 2 << std::endl;
    
    int i_char;// = 0;
    std::wstringstream tss;
    for (int i = 0; i < i_len / 2; ++i)
    {
        ss.clear();
        
        ss.str(s.substr(2 + i * 2, 2));
        
        ss >> std::uppercase >> std::hex >> i_char;
        tss << (TCHAR)i_char;
    }
    t = tss.str();


    std::wcout << L"DECODE: строка после:\t\t" << t << std::endl;

    return i_len;
}

int _tmain(int argc, _TCHAR* argv[])
{
        std::string source;

        std::wstring msg_in;
        std::wstring msg_out;
        msg_in = L"Привет";

        encode(&source, msg_in);
        std::cout <<  std::endl<< std::endl ;
        decode(source, msg_out);

    return 0;
}