Re: bug list: assigning negative values to unsigned variables

From: Julia Lawall
Date: Wed Jan 27 2010 - 07:30:28 EST

On Wed, 27 Jan 2010, Bernd Petrovitsch wrote:

> On Mit, 2010-01-27 at 11:57 +0100, Julia Lawall wrote:
> > On Wed, 27 Jan 2010, Dan Carpenter wrote:
> >
> > > Fixing the places which assign negative values to unsigned variables is a good janitor task.
> >
> > I had the impression that assignment to -1 was done sometimes as a
> > portable way to initialize the variable to 0xffff (for any number of f's).
> > So perhaps it is not so trivial to fix.
> Any particular reason that ~0U, ~0UL, and ~0ULL shouldn't do the same
> (without relying on conversion from signed to unsigned)?

Then the constant specifies the type?

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