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List:       koffice-devel
Subject:    Re: Problem with big integers
From:       Stefan Nikolaus <stefan.nikolaus () kdemail ! net>
Date:       2007-01-30 16:31:02
Message-ID: 200701301731.06263.stefan.nikolaus () kdemail ! net
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On Monday 29 January 2007 11:45:01 Brad Hards wrote:
> What I don't understand is why. Why not always just use a float, and
> convert it in the asInteger() or asUnsignedLongLong() or whatever
> functions?

I was told, that long long is a C data type. Either way, I'd prefer to rely on 
Qt's platform independent qint64.
But to your question: I see no good reason to store also the integer values in 
the double variable, whose mantisse is guaranteed to have 53 bits. The 
resulting range is -2^53 ... 2^53. Above (or below) it gets inaccurate. But 
that's at least more as long provides (at least): -2^31 .. 2^31-1.

If nobody else objects and disabuses me, go ahead and modify Value to use the 
double variable also for the integers.

Regards,
Stefan

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