Function safe_strto32

tensorflow/core/lib/strings/numbers.cc:285–313

}

bool safe_strto32(StringPiece str, int32* value) {
  SkipSpaces(&str);

  int64 vmax = kint32max;
  int sign = 1;
  if (absl::ConsumePrefix(&str, "-")) {
    sign = -1;
    // Different max for positive and negative integers.
    ++vmax;
  }

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

  int64 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>(result * sign);
  return true;
}

bool safe_strtou32(StringPiece str, uint32* value) {
  SkipSpaces(&str);