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Top Forums UNIX for Advanced & Expert Users Mawk printf %d maxes out at 2147483647 Post 302883078 by Corona688 on Friday 10th of January 2014 04:31:37 PM
Old 01-10-2014
I've dug into mawk's code a bit and switching it to a 64-bit integer isn't quite as easy as it seems. It's a sticky problem, because of the mutability of numbers in awk. They are quite careful to get a 32-bit int and a 64-bit double, since all 32-bit integers can be faithfully represented by a 64-bit float, but what happens when your int is 64-bit? Not all 64-bit integers can be perfectly represented by the 53-bits precision of a 64-bit float.

It also passes on its printf options into the system printf's, almost completely faithfully, except for a weird case they added in 1995 for a system that only had 16-bit ints. I suspect another such weird case would be needed for 64-bits.

Last edited by Corona688; 01-10-2014 at 06:49 PM..
 

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