PERL Miscellaneous - File::ReadBackwards, use integer

Author

File::ReadBackwards, use integer

xhoster@gmail.com

2005-04-23, 3:57 pm

I'm having trouble using File::ReadBackwards on large files.

The problem is that the line:
my $read_size = $s

_pos % $max_read_size || $max_read_size ;
yields -1 when $s

_pos is large.

I've "solved" the problem by commenting out the line:
#use integer;

But I'm sure that "use integer" wasn't put there just be ornery, so now I
wonder what awful thing is going to happen because I commented it out.

Any thoughts?

Thanks,

Xho

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Anno Siegel

2005-04-23, 8:56 pm

<xhoster@gmail.com> wrote in comp.lang.perl.misc:
> I'm having trouble using File::ReadBackwards on large files.
>
> The problem is that the line:
> my $read_size = $s

_pos % $max_read_size || $max_read_size ;
> yields -1 when $s

_pos is large.
>
> I've "solved" the problem by commenting out the line:
> #use integer;
>
>
> But I'm sure that "use integer" wasn't put there just be ornery, so now I
> wonder what awful thing is going to happen because I commented it out.

That "use integer" governs 220 lines of code. That's not a whole lot,
but it would be hard to find all places where "integer" might make a
difference. I'd ask Uri why it's there.

Even without looking at the code, "use integer" is likely to introduce a
2GB limit -- the documentation doesn't seem to mention such a thing.

Anno

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