[Gambas-user] How to handle unsigned Integer, Short, Long

[Jussi Lahtinen]

If you declare variable as integer in Gambas and pass it as unsigned 32bit
variable to lib made with C, then I don't think the lib will notice any
difference. It's just that Gambas will show large values of that variable
as negative numbers.

Jussi


On Wed, Jan 22, 2014 at 3:19 PM, wally <wally at ...2037...> wrote:

> Hello
>
> @Jussi,
>
> i must handle a lot of 4byte uint32_t values which represents
> node IP addresses of devices in a rs232 ring network.
> I know i might use long instead of unsigned 4byte integer,
> but i expected there is a keyword "unsigned" somewhere to
> declare as needed.
> The "long" approach for uint32_t is not very elegant solution.
>
> So answer seems to be, Gambas3 does not allow to declare
> unsigned variables as there are e.g. : uint32_t andd friends.
>
> Is this correct so far ?    <-- seems yes, as Benoit wrote.
>
> @Benoit:
>
> Alas you have no unsigned datatypes in Gambas. Maybe in a future Gambas 4?
>
> You have to use signed version, and be careful with the arithmetic you
> are doing.
>
>
> If it is not too much work it would be nice to have unsigned in version 4.
> Yes, exactly, the maths is the problem. In c i get overflow warnings at
> lest.
>
> wally
>
>
> On 01/22/2014 12:43 PM, Jussi Lahtinen wrote:
> > Instead of unsigned integer and short, why not just normal signed long?
> It
> > can hold same values. Integer is variable of 32 bits and it's declaration
> > determines how the first bit is interpreted. So in some cases it doesn't
> > matter.
> > Where do you need these exactly?
> >
> > Jussi
> >
> >
> > On Wed, Jan 22, 2014 at 11:15 AM, wally <wally at ...2037...> wrote:
> >
> >> Hello,
> >>
> >> Where can i find information and example code on:
> >>
> >> How to declare and handle *_unsigned_*__Integer, Short, Long in Gambas3
> ?
> >>
> >> thank you wally
> >>
> >>
> >>
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