From: Greg Baker <gbaker@walleroo.rp.csiro.au>
Subject: How to supply pointer to C?
Date: 1996/08/27
Date: 1996-08-27T00:00:00+00:00 [thread overview]
Message-ID: <85ybj1zcdu.fsf@walleroo.rp.CSIRO.AU> (raw)
Interfaces.C.Pointers.Value can get you from a C array to an Ada
array, and Interfaces.C.To_C can get you from a String to a
null-terminated block of chars, but what if I want to get a block of
ints, for examples?
More generally, what if I have some object and I want to pass its
address to some C function. (The question arises as I am trying to
write an Ada gdbm interface - gdbm_store takes as arguments structs of
the form-
struct { char * dptr; int data_size; }.
(i.e. record
dptr : Interfaces.C.Pointers.???
data_size : Interfaces.C.int
end;
)
I'm kind of hoping to do something like
x.dptr := Magical_Conversion_function ( object'Access );
x.data_size = object'Size;
Any suggestions?
--
Gregory D. Baker gbaker@rp.csiro.au CSIRO Radiophysics
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next reply other threads:[~1996-08-27 0:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-08-27 0:00 Greg Baker [this message]
1996-08-27 0:00 ` How to supply pointer to C? David C. Hoos, Sr.
1996-08-28 0:00 ` Robert Dewar
1996-08-28 0:00 ` Larry Kilgallen
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