Method __get_base

system/lib/libcxx/src/locale.cpp:4023–4032

// num_get helpers

int __num_get_base::__get_base(ios_base& iob) {
  ios_base::fmtflags __basefield = iob.flags() & ios_base::basefield;
  if (__basefield == ios_base::oct)
    return 8;
  else if (__basefield == ios_base::hex)
    return 16;
  else if (__basefield == 0)
    return 0;
  return 10;
}

const char __num_get_base::__src[33] = "0123456789abcdefABCDEFxX+-pPiInN";