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- Differentr Values for intval(float)
February 18, 2006, 4:15 pm
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$BB = -2181087916;
$AA = (int)$BB;
$AA = intval($BB);
On some systems, $AA will be int(-2147483648), which is actually
consistent with the documentation.
On most systems, however, $AA will be int(2113879380), which is the
same value truncated at 32 bits.
I actually need the latter behavior, as it needs to duplicate Delphi
code, which, like C, behaves the same way.
This is encryption code that does a bunch of calculations on signed
32-bit numbers and ignores any overflows.
Any ideas how I can do this?
Re: Differentr Values for intval(float)
It's never a good idea to depend on hardware dependent features like the
handling of overflow. They have a tendency to break when you move to a
different hardware platform.
I guess you could do some testing and bit manipulation on it, but that's
adding more complexity to the code (and more chances for it to break).
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