Hi, The old ODBC/FFI has quite some bindings in ODBCLibrary class that may be of some help. To load FFI (taken from http://pharo.gemtalksystems.com/book/PharoTools/FFI/ ): Gofer new squeaksource: 'MetacelloRepository'; package: 'ConfigurationOfFFI'; load. (Smalltalk at: #ConfigurationOfFFI) project lastVersion load and ODBC: Gofer new squeaksource: 'ODBC'; package: 'ConfigurationOfODBC'; load. Both works very well with Pharo 3 (didn't try yet in Pharo 4) Regards Alain Le 15/10/2014 22:59, Nicolai Hess a écrit :

2014-10-15 19:18 GMT+02:00 Eliot Miranda <eliot.miranda@gmail.com <mailto:eliot.miranda@gmail.com>>:

Hi Annick,

On Wed, Oct 15, 2014 at 7:57 AM, Annick Fron <list@afceurope.com <mailto:list@afceurope.com>> wrote:

What is the syntax to describe an external structure with an array of int of size 6 ?

I know only the syntax

fields ^#( (param1 ‘long’) (param2 ‘long’) (param3 ‘long’) (param4 ‘long’) (param5 ‘long’) (param6 ‘long’) )

Hmm. Good question. It seems you can write

fields "IAXCallStateEvent defineFields" ^#( (type 'long') (callNo 'long') (state 'long') (format 'long') (vformat 'long') (remote 'char[256]') (remoteName 'char[256]') (local 'char[256]') (localContext 'char[256]') )

But as a community we really need to document the FFI more thoroughly :-/

+1 I can not even find up to date information on how to *install* current working FFI. Aren't there any "alive" projects build on FFI (old or Alien-FFI). It would help to see more real-life examples.

Annick

-- best, Eliot

2014-10-16 11:53 GMT+02:00 Annick Fron <list@afceurope.com>:

Hi Eliot,

Thank you. Meanwhile I have tried to use only pointers to structs by writing some C code.

I confirm that in Pharo you can load FFI and OldAlien in the ConfigurationBrowser. Yet it seems both FFI and Alien versions in the ConfigurationBrowser are behind the squeak repositories. I did not try if the new versions worked.

I have posted some time ago an example for X11 windows on Linux, and I never got an answer why it was failing.

actually I did answer ;) http://forum.world.st/FFI-on-Linux-again-td4780236.html and you changed the argument "ourWindow" to "ourWindow xid" like I proposed. But yes, actually this didn't help, I guess. You still get the error "bad argument" ? My next bet would be: Maybe we cannot mix Alien calls with (old) FFI structures (display is a externalstructure defined for FFI).

It was the following testGetOurWindowLocation "self new testGetOurWindowLocation"

| display ourWindow aParent anX anY aWidth aHeight aBorderWidth aDepth | display := X11Display XOpenDisplay: nil. ourWindow := display ourWindow. (Alien lookup: 'XGetGeometry' inLibrary: 'X11') primFFICallResult: nil withArguments: {display. ourWindow xid. (aParent := Alien new: 4). (anX := Alien new: 4). (anY := Alien new: 4). (aWidth := Alien new: 4). (aHeight := Alien new: 4). (aBorderWidth := Alien new: 4). (aDepth := Alien new: 4)}. (anX unsignedLongAt: 1) inspect.

Has anybody looked at Wayland (replacement of X11) on Linux ?

Annick

Le 15 oct. 2014 à 19:18, Eliot Miranda <eliot.miranda@gmail.com> a écrit :

Hi Annick,

On Wed, Oct 15, 2014 at 7:57 AM, Annick Fron <list@afceurope.com> wrote:

...

What is the syntax to describe an external structure with an array of int of size 6 ?

I know only the syntax

fields ^#( (param1 ‘long’) (param2 ‘long’) (param3 ‘long’) (param4 ‘long’) (param5 ‘long’) (param6 ‘long’) )

Hmm. Good question. It seems you can write

fields "IAXCallStateEvent defineFields" ^#( (type 'long') (callNo 'long') (state 'long') (format 'long') (vformat 'long') (remote 'char[256]') (remoteName 'char[256]') (local 'char[256]') (localContext 'char[256]') )

But as a community we really need to document the FFI more thoroughly :-/

...

Annick

-- best, Eliot

Le 15 oct. 2014 à 19:18, Eliot Miranda <eliot.miranda@gmail.com> a écrit :

Hi Annick,

On Wed, Oct 15, 2014 at 7:57 AM, Annick Fron <list@afceurope.com> wrote:

...

What is the syntax to describe an external structure with an array of int of size 6 ?

I know only the syntax

fields ^#( (param1 ‘long’) (param2 ‘long’) (param3 ‘long’) (param4 ‘long’) (param5 ‘long’) (param6 ‘long’) )

Hmm. Good question. It seems you can write

fields "IAXCallStateEvent defineFields" ^#( (type 'long') (callNo 'long') (state 'long') (format 'long') (vformat 'long') (remote 'char[256]') (remoteName 'char[256]') (local 'char[256]') (localContext 'char[256]') )

But as a community we really need to document the FFI more thoroughly :-/

...

Annick

-- best, Eliot