Re: long long unsigned on 32-bit machines

[Michael J. Tubby B.Sc. MIET]

On 27/01/2020 20:24, Gary E. Miller wrote:

> Yo Hal!
>
> On Sat, 25 Jan 2020 23:42:21 -0800
> Hal Murray <address@hidden> wrote:
>
> > There are at least 2 ways to fix that.
> >
> > There are a bunch of symbols to handle this mess: PRIu64 and friends
> > are defined in /usr/include/inttypes.h  It's
> >
> > /usr/include/inttypes.h:# define PRIu64         __PRI64_PREFIX "u"
> >       
> I tried that.  A bunch of older compilers barf on PRIu64.  Yes, it is POSIX
> 2001, but implementation is still marginal.
>
> > You can cast the thing you want to print to (unsigned) long long and
> > use ll.
> >
> > printf("%llu"\n", (unsigned long long)t);
> >       
> What is what I had to convert the PRIu64 back to for things to compile.
>     
    
    Which is why all of the code that we have developed in house since
    1990 uses #defines like
    
    #define UC unsigned char
    #define US unsigned short
    #define UL unsigned long
    #define ULL unsigned long long
    
    so that we can globally update our code with:
    
    #define UC uint8_t
    
      #define US uint16_t
    
      #define UL uint32_t
    
      #define ULL uint64_t
    
    or whatever flavour we need for irksome compilers or build
    environments ;-)
    
    ... and there are a few 64-bit environments that return
    sizeof(time_t) = 4 which is worrisome ;-(
    
    Mike
    
> RGDS
> GARY
> ---------------------------------------------------------------------------
> Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
> 	address@hidden  Tel:+1 541 382 8588
>
> 	    Veritas liberabit vos. -- Quid est veritas?
>     "If you can't measure it, you can't improve it." - Lord Kelvin
>

--

Michael J Tubby B.Sc. (Hons) MIET / Technical Director
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