! Converts a long double to unsigned long long. Assumes that val is already an integer - use floorl or ceill */

! Returns YES if the given ranges intersect. Two ranges are considered to intersect if they share at least one index in common. Thus, zero-length ran

! Returns true if a * b does not overflow an unsigned long long. */

! Returns a * b as an NSUInteger. This asserts on overflow, unless NDEBUG is defined. */

! Returns true if the end of A is larger than the end of B. */

! Returns YES if needle is fully contained within haystack. Equal ranges are always considered to be subranges of each other (even if they are empty)

! Returns a - b as an unsigned long long. This asserts on underflow (if b > a), unless NDEBUG is defined. */

! Returns whether a+b > c+d, as if there were no overflow (so ULLONG_MAX + 1 > 10 + 20) */