ACE_TString b32h_encode(const ACE_TCHAR* decoded) { static const ACE_TCHAR lookup[] = ACE_TEXT("0123456789ABCDEFGHIJKLMNOPQRSTUV"); static const ACE_TCHAR padding[] = ACE_TEXT("======"); static const size_t enc[] = {0, 2, 4, 5, 7}; // #input -> #non-padded output ACE_TString encoded; for (size_t len = ACE_OS::strlen(decoded); *decoded; decoded += 5, len -= 5) { ACE_UINT64 chunk = 0; for (size_t i(0); i < 5 && i < len; ++i) { chunk |= static_cast<ACE_UINT64>(decoded[i] & 0xFF) << ((4 - i) * 8); } size_t limit = (len < 5) ? enc[len] : 8; for (size_t i(0); i < limit; ++i) { unsigned char val = static_cast<unsigned char>(chunk >>((7 - i) * 5)) & 0x1F; encoded += lookup[val]; } if (len < 5) { encoded.append(padding, 8 - enc[len]); return encoded; } } return encoded; }