Method ParseHexNum

contrib/libs/flatbuffers/src/idl_parser.cpp:455–465

Parses exactly nibbles worth of hex digits into a number, or error.

// Parses exactly nibbles worth of hex digits into a number, or error.
CheckedError Parser::ParseHexNum(int nibbles, uint64_t *val) {
  FLATBUFFERS_ASSERT(nibbles > 0);
  for (int i = 0; i < nibbles; i++)
    if (!is_xdigit(cursor_[i]))
      return Error("escape code must be followed by " + NumToString(nibbles) +
                   " hex digits");
  std::string target(cursor_, cursor_ + nibbles);
  *val = StringToUInt(target.c_str(), 16);
  cursor_ += nibbles;
  return NoError();
}

CheckedError Parser::SkipByteOrderMark() {
  if (static_cast<unsigned char>(*cursor_) != 0xef) return NoError();