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Postings from July 2001
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Moin,
On 23-Jul-01 Tels tried to scribble about:
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> Moin Bryce,
>>And, Or, and Xor on two positive BigInts seem to work ok. However, if
>>you throw in a negative operand you get some very strange behavior. I'm
This is an interesting bug. I choose for now to make the result the same for
negatives than for positives, because:
Perl scalar:
at -1 -1
4294967295
In your own words:
"However, if you throw in a negative operand you get some very strange
behavior." - Indeed ;)
I am unsure how to repeat this. The result of -1 & -1 highly depends on the
width of a Perl scalar. Since Bigint is by definition "infinite width", the
result should probably be something like +inf :-) Seriously, I do not know
how to repeat Perl's behaviour without assuming a specific width. Anyway,
your program looking for -1 & -1 beeing 4294967295 will fail on any
platform not having 32 bit (like 64 bit).
Has anybody any comments or ideas on what to do?
Best wishes,
Tels
- --
perl -MMath::String -e 'print \
Math::String->from_number("215960156869840440586892398248"),"\n"'
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