Function SafeStringTo32

graphlearn/src/common/string/numeric.cc:97–128

}  // anonymous namespace

bool SafeStringTo32(LiteString str, int32_t* value) {
  SkipSpaces(&str);

  int64_t vmax = kInt32Max;
  int sign = 1;
  if (str.Consume("-")) {
    sign = -1;
    ++vmax;
  }

  if (!isdigit(SafeFirstChar(str))) {
    return false;
  }

  int64_t result = 0;
  do {
    result = result * 10 + SafeFirstChar(str) - '0';
    if (result > vmax) {
      return false;
    }
    str.remove_prefix(1);
  } while (isdigit(SafeFirstChar(str)));

  SkipSpaces(&str);

  if (!str.empty()) {
    return false;
  }

  *value = static_cast<int32_t>(result * sign);
  return true;
}

bool SafeStringTo64(LiteString str, int64_t* value) {
  SkipSpaces(&str);