Re: more GDK->GTK mapping
- From: Oskar Liljeblad <osk hem passagen se>
- To: egger suse de
- Cc: hp redhat com, gtk-devel-list gnome org
- Subject: Re: more GDK->GTK mapping
- Date: Fri, 2 Mar 2001 08:05:43 +0100
On Thursday, March 01, 2001 at 20:15, egger suse de wrote:
> On 1 Mar, Havoc Pennington wrote:
>
> > No. You don't want to use signed ints for bitfields, gboolean is a
> > signed int.
>
> Why the heck is gboolean signed? This is a design mistake IMHO
> and should be rectified ASAP as a boolean is either TRUE or FALSE
> also known as 1 and 0, thus no negative values can happen. It's
> really a pity that boolean isn't an official type in C99 as it
> allows some assumptions to be made which would speed up the executables
> a bit since the compiler can optimize more.
> Anyways, using unsigned types whereever possible makes the compiler
> generate better code because it doesn't have to care about possible
> signedness, however for boolean values the difference might be tiny,
> yet the opportunity to use bitfields makes it interesting.
I agree. Shouldn't be too hard to change that typedef, since all code
that relies on gboolean being signed is broken anyway...
Besides, why isn't boolean defined like this:
typedef uint{8,16,32,64}_fast_t gboolean;
About uintXX_fast_t from the GNU libc manuals:
If you don't need a specific storage size, but want the data
structure that allows the fastest access while having at least N bits
(and among data structures with the same access speed, the smallest
one), use one of these: [..]
I don't know how well that would work with bitfields though...
Oskar Liljeblad (osk hem passagen se)
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