Re: Fwd: constant in C

[Micha Feigin <michf@post.tau.ac.il>]

On Fri, Sep 24, 2004 at 11:47:13AM +0100, Ankit Jain wrote:
> can the size be greater than 4byte on a 32 bit system?
> 
> thanks
> 

I am not sure if long long support (yes, two longs) is completely
standard, but on compilers where it is supported its size should be 8
bytes (64 bit).

I just tested under gcc 3.3 and it is supported with it and of size 8.

> ankit
>  --- Micha Feigin <michf@post.tau.ac.il> wrote: 
> > On Fri, Sep 24, 2004 at 01:03:17PM +0530, Uday Karan
> > wrote:
> > > Sorry didn't CC to list.
> > > 
> > > > Therefore you cannot use sizeof(const),  &const
> > etc.
> > > 
> > > sizeof (CONST) can be done and would return the
> > size of an integral
> > > type that would be able to hold that value, could
> > be 4 for ints or 8
> > > for long ints, if none of these can take up the
> > value (because you're
> > 
> > Actually the size of long int is 4 and the size of
> > short is 2, the size
> > of int depends on the platform. With the old 16bit
> > platforms (if you
> > can still find them ;-) it was 2 and with 32 bit
> > machines its 4.
> > 
> > Int was supposed to be a word, but on 64bit machines
> > that is not longer
> > stable.
> > 
> > with 64bits, a pointer is of size 8, but int and
> > long can be either 4
> > or 8 and sometimes there is long long.
> > 
> > have look at http://en.wikipedia.org/wiki/64-bit.
> > 
> > > substitutive constant is insanely large), the
> > compiler would usually
> > > give out a warning (if truncating) or an error
> > straightaway.
> > > 
> > > - Uday
> > > -
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