RE: Using limits.h

[Robert Shearman]

> -----Original Message-----
> From: Alexandre Julliard [mailto:[e-mail]]
> Sent: 09 September 2003 03:13
> To: Robert Shearman
> Cc: [e-mail]
> Subject: Re: Using limits.h
>
> "Robert Shearman"  writes:
> > I'm trying to use the default limits.h installed on my Debian
>
> Woody system,
> > so that I can use either LLONG_MAX or LONG_LONG_MAX in Wine. Does anyone
> > know of anything special I have to define so that these are
>
> defined? I have
> > tried __USE_ISOC99, but no joy.
>
> If you have to do some special magic to get them, it's a clear sign
> that these symbols are not portable and should not be used.

Should I just use the constant that LONG_LONG_MAX equates to and put this
into the source file then? Is this portable (i.e. is long long 64bits on all
platforms) ?

On another note, how would you feel to adding a new debugging function (say
debugstr_lld) to print out the decimal value of long longs?

Rob

Using limits.h

[Alexandre Julliard]

"Robert Shearman"  writes:
> Should I just use the constant that LONG_LONG_MAX equates to and put this
> into the source file then? Is this portable (i.e. is long long 64bits on all
> platforms) ?

Well, long long itself is not very portable, and long long constants
definitely aren't. What do you need this for?
> On another note, how would you feel to adding a new debugging function (say
> debugstr_lld) to print out the decimal value of long longs?

We could do something like that yes.

Using limits.h

[Robert Shearman]

> -----Original Message-----
> From: Alexandre Julliard [mailto:[e-mail]]
> Sent: 09 September 2003 17:36
> To: Robert Shearman
> Cc: [e-mail]
> Subject: Re: Using limits.h
>
> Well, long long itself is not very portable, and long long constants
> definitely aren't. What do you need this for?

I am using it for invalid values for time properties in DirectShow. I
thought LONG_LONG_MAX would be the easiest way to indicate that the time is
invalid and hence has not been set yet, without making it a pointer and
without having to use an additional flag.

I think I will end up using a variation of David's solution.

Rob

Using limits.h

[David Laight]

> Should I just use the constant that LONG_LONG_MAX equates to and put this
> into the source file then? Is this portable (i.e. is long long 64bits on all
> platforms) ?

#define LONG_LONG_MAX (~0ull)

David

Using limits.h

[Alexandre Julliard]

David Laight  writes:
> #define LONG_LONG_MAX (~0ull)

That's ULONG_LONG_MAX, not LONG_LONG_MAX. And note that the 'll'
suffix is not portable.