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Re: widget array
- From: adlaib <adlaib lucent com>
- To: gtk-app-devel-list redhat com
- Subject: Re: widget array
- Date: Wed, 20 Oct 1999 12:42:43 -0500
u know - that's what i thought too - but it don't work with gcc on Sun.
Bryan Wilkinson wrote:
>
> > however, there are more pressing matters to attend to - u have
> > > *((GtkWidget **)widgetPtr +1)
> > this is a core dump waiting to happen. on 32 bit machines pointers are 4 bytes
> > so
> > it should be + 4; it is much easier (and safer/portable) to do +
> > sizeof(widgetPtr) - which
> > should give u the pointer size in bytes.
>
> pointer arithmetic causes widgetPtr + 1 to be the same as &widgetPtr[1].
> using widgetPtr + sizeof(widgetPtr) is not what the person wants, they
> want the address of the next element in the array, in which case +1 is
> correct.
>
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