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+---- Thread: 64 bit data types? (/showthread.php?tid=310)
64 bit data types? - mhabermann - 22-09-2006
Hello!
Rule 6.3 of MISRA-C lists the typedefs for uint64_t and int64_t, which I believe are not used anymore in the standard and should be disallowed by C90.
Can you confirm that uint64_t and int64_t datatypes are not allowed?
Best Regards
Michael
Re: 64 bit data types? - phaedsys - 23-09-2006
Hi,
mhabermann Wrote:Rule 6.3 of MISRA-C lists the typedefs for uint64_t and int64_t, which I believe are not used anymore in the standard and should be disallowed by C90.
Can you confirm that uint64_t and int64_t datatypes are not allowed?
My personal opinion is that if your environment has 64 bit ints then you can use uint64_t you can also use int128_t if there is one.
Whilst MISRA-C is based on C90 we are in a real world where there are 64 bit and 128 bit systems in use. There has been some discussion in other places where there are machines using 9 bits and 36 bits. The int**_t and uint**_t can cope with all of these.
MISRA-C is for the use for systems in the real world, not the theorectical world of ISO language standards.