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Re: [Chicken-users] long pointer equivalent
From: |
felix |
Subject: |
Re: [Chicken-users] long pointer equivalent |
Date: |
Sun, 25 Aug 2002 18:40:11 +0200 |
Peter Keller wrote:
>
> >
> > Or perhaps I'm misunderstanding you: if you just need a pointer to
> > long long, without the need for dereferencing, you can simply use
> >
> > (pointer "long long")
>
> Ah, I don't need a pointer to long long. :) I need a pointer to a long
> which is conspicuously missing from your chicken->C type conversion chart.
(pointer "long")
>
> See, the function I want to write an FFI for is this:
> int compress(Bytef *dest,uLongf *destLen, const Bytef *source, uLong
> sourceLen);
>
> Bytef is a:
> typedef unsigned char Bytef;
>
> uLongf is a bit more complicated:
>
> # define FAR
> typedef unsigned long uLong; /* 32 bits or more */
> typedef uLong FAR uLongf;
>
> The problem comes in that I should prolly represent the vectors as
> u8vector and friends and write careful wrappers around these functions to
> make sure the data gets massaged correctly into the right form.
>
> In this case, I prolly actually need u64vector, s64vector.
>
> The trouble is I'm trying to figure out how to easily make an array in
> chicken of the right type and pass it to these functions that expect it.
> In short, I'm still a little confused, I'm sure time and beating on the
> problem will show the solution.
You shouldn't worry about 64-bit platforms, yet. That way you can use
`s32vector'/`u32vector' as foreign argument types and everything works.
>
> Thanks for all of your help. I appreciate it.
You are welcome.
cheers,
felix
- Re: [Chicken-users] long pointer equivalent, (continued)
- Re: [Chicken-users] long pointer equivalent, Peter Keller, 2002/08/22
- Re: [Chicken-users] long pointer equivalent, felix, 2002/08/23
- Re: [Chicken-users] long pointer equivalent, Peter Keller, 2002/08/23
- Re: [Chicken-users] long pointer equivalent, felix, 2002/08/24
- Re: [Chicken-users] long pointer equivalent, Peter Keller, 2002/08/25
- Re: [Chicken-users] long pointer equivalent,
felix <=
- Re: [Chicken-users] long pointer equivalent, Perry E. Metzger, 2002/08/25
- Re: [Chicken-users] long pointer equivalent, felix, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, Perry E. Metzger, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, felix, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, Perry E. Metzger, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, felix, 2002/08/27
- Re: [Chicken-users] long pointer equivalent, Peter Keller, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, Perry E. Metzger, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, Peter Keller, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, Perry E. Metzger, 2002/08/26