Re: SInt64 and UInt64 problems with large values

FROM : Ken Tozier
DATE : Sat Apr 02 17:20:27 2005

On Apr 2, 2005, at 4:42 AM, Ondra Cada wrote:

> Ken,
>
> On 2.4.2005, at 11:00, Ken Tozier wrote:
>

>> In lieu of using "long long" and "unsigned long long" in my code, I'm
>> trying to use the more compact "SInt64" and "UInt64" both of which
>> the compiler seems to be aware of , but when I try to give UInt64 a
>> large constant hex value such as 0xFFFFFFFFFFFFFFFF, the complier
>> complains that "integer constant is too large for "long" type." I
>> searched for the definition of UInt64 and found it in MacTypes.h
>> where it is defined as "typedef unsigned long long UInt64" so why
>> does the compiler not allow the maximum hex value? Is there some
>> undocumented upper limit to long long values?

>
> Check the compiler support for big constants. By default, these
> constants are integers (the compiler, at the time the constant is
> interepreted, does not and cannot know you will store it into a long
> or even long long), and thus self-evidently too big.
>
> You'll have to use some suffix, like 0xFF...FFull (or something), to
> let the compiler know the constant is long long AND unsigned, too. At
> the moment, I don't recall the proper suffix though, sorry.


Adding "ull" suffix did the trick. Thanks

Ken


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> Ondra Čada
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