Function SafeStringTo64

graphlearn/src/common/string/numeric.cc:130–172

}

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

  int64_t vlimit = kInt64Max;
  int sign = 1;
  if (str.Consume("-")) {
    sign = -1;
    vlimit = kInt64Min;
  }

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

  int64_t result = 0;
  if (sign == 1) {
    do {
      int digit = SafeFirstChar(str) - '0';
      if ((vlimit - digit) / 10 < result) {
        return false;
      }
      result = result * 10 + digit;
      str.remove_prefix(1);
    } while (isdigit(SafeFirstChar(str)));
  } else {
    do {
      int digit = SafeFirstChar(str) - '0';
      if ((vlimit + digit) / 10 > result) {
        return false;
      }
      result = result * 10 - digit;
      str.remove_prefix(1);
    } while (isdigit(SafeFirstChar(str)));
  }

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

  *value = result;
  return true;
}

bool FastStringTo32(const char* str, int32_t* value) {
  char* end = nullptr;