On an architecture where sizeof(long)==8, I would think that neither solution would work.

I think (or actually, I'm pretty sure, because on my system, sizeof(long)==8) the pack/unpack solution would work, because pack "l" always (by definiton) is 32-bit, independent of what long might be on the system/C compiler, otherwise.

In reply to Re^4: Integer overflow by almut
in thread Integer overflow by terranullis

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