Re: [gtk-list] Re: How to use a gpointer?
- From: Ulric Eriksson <ulric edu stockholm se>
- To: gtk-list redhat com
- Subject: Re: [gtk-list] Re: How to use a gpointer?
- Date: Thu, 4 Mar 1999 18:50:23 +0100 (CET)
On Thu, 4 Mar 1999, Tim Janik wrote:
> after having seen various statements on this topic,
> i think it's time to clarify some points.
> for GLib to compile on several different platforms, certain
> assumptions can be made about its data types.
> gint8 sizeof (gint8) = 1 byte, signed
> guint8 sizeof (guint8) = 1 byte, unsigned
> gint16 sizeof (gint16) = 2 bytes, signed
> guint16 sizeof (guint16) = 2 bytes, unsigned
> gint32 sizeof (gint32) = 4 bytes, signed
> guint32 sizeof (guint32) = 4 bytes, unsigned
> gint is merely an alias for the system's int and guarranteed
> to be >= 4 bytes in size, signed.
> guint is and unsigned gint.
> glong is an alias for the system's long and guarranteed to be >=
> sizeof (gint), signed.
> gulong is an unsigned glong.
> gpointer is essentially a void* and guarranteed to be >= sizeof (gint)
> and <= sizeof (glong) in size.
Well spank me with a wet noodle if I'm wrong, but here is cut-and-paste
from glib.h of 1.2:
typedef int gint;
typedef void* gpointer;
There is nothing in these typedefs that guarantees that a gint will fit
in a gpointer.
Some of the headers are generated when Glib is compiled, but not glib.h,
so I suppose that the above is the same on the Alpha.
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