Is all of that manual tracking whether a integer is signed or unsigned necessary?

The range of numbers substr accepts for its position and length offsets can be greater than the range of signed or unsigned integers.

Take a system where both IV and STRLEN are 32 bits. The range of the position and length arguments should be -2**32 .. 2**32-1 (33 bits). Even with all that complexity, only -2**31 .. 2**32 (32 bit signed or 32 bit unsigned) is accepted.

I'm all for simplifying it, but Perl doesn't currently have a type that's twice the size of IV (LONG_IV?) as far as I know. Keep in mind I wrote that under pressure since I took on the task when it was one of the last two or three 5.12 blockers. I took the easiest approach for me ("When all you have is a hammer, every problem looks like a nail.") and the one least likely to cause immediate problems.

Note that $[ is being removed shortly, so some substr will shrink (but not the bit you posted).

In reply to Re^3: [OT] LLP64 .v. LP64 portability by ikegami
in thread [OT] LLP64 .v. LP64 portability by BrowserUk

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