593     // Modify the places where the following characters are used to prevent

   593     // Encode each 16 bit (or 8 bit) character to 4 (or 2) safe characters to prevent

   602     std::string convBuf;

   597     int len = str.length();

   603 

   598 

   604     while (idx != std::string::npos)

   599     for (int pos = 0; pos < len; ++pos)

   605     {

   600     {

   606         // Add all characters up to and including the current special char to

   601         wchar_t c = str[pos];

   607         // final result string

   602         if (c & 0xFF00)

   608         if (idx >= cur)

   603         {

   609         {

   604             // 16 bit char, must send all bits

   610             res.append(str.substr(cur, (idx - cur) + 1));

   605             res += ( L'A' + (c >> 12) );

   611         }

   606             res += ( L'A' + ((c & 0x0F00) >> 8) );

   612 

   607             res += ( L'A' + ((c & 0x00F0) >> 4) );

   613         // Encode all special characters 'X' in same way.

   608             res += ( L'A' + ((c & 0x000F)) );

   614         // "X" -> "X%"

   609         }

   615         res.append(L"%");

   610         else

   616 

   611         {

   617         cur = idx + 1;

   612             // 8 bit char, send only lowest 8 bits

   618         idx = str.find_first_of(specials, cur);

   613             res += ( L'a' + ((c & 0x00F0) >> 4) );

   619     }

   614             res += ( L'a' + ((c & 0x000F)) );

   620 

   615         }

   621     // Add characters after last special character if any

   616     }

   622     res.append(str.substr(cur, str.length() - cur));