Function CheckedAdd

internal/overflow.cc:76–88

}  // namespace

absl::StatusOr<int64_t> CheckedAdd(int64_t x, int64_t y) {
#if ABSL_HAVE_BUILTIN(__builtin_add_overflow)
  int64_t sum;
  if (!__builtin_add_overflow(x, y, &sum)) {
    return sum;
  }
  return absl::OutOfRangeError("integer overflow");
#else
  CEL_RETURN_IF_ERROR(CheckRange(
      y > 0 ? x <= kInt64Max - y : x >= kInt64Min - y, "integer overflow"));
  return x + y;
#endif
}

absl::StatusOr<int64_t> CheckedSub(int64_t x, int64_t y) {
#if ABSL_HAVE_BUILTIN(__builtin_sub_overflow)