[Scilab-users] scilab2c toolbox query

[brijesh guptacr]

Hello,

Brijesh here. Abhinav and I work together on Scilab2c.

1)Will a completely rewritten scilab2c in 5.5.2 solve the issues we are
facing?

2) Can you please explain in a little more detail as to how the suggested
approach works in Scilab 6 and why not in 5.5.2.

3)Would switching from 5.5.2 to 6 help us?

Sysdiag, orth, pca and svd to name a few functions that are problematic.

With Regards,
Brijesh Gupta C R

On Wed, Sep 6, 2017 at 7:13 PM, Clément David <Clement.David at esi-group.com>
wrote:

> Hello Abhinav,
>
> Nice to have someone interested in scilab2c. Currently there is no active
> maintainer, feel free to
> contribute to it.
>
> > 1) To write a new function, we always have to decide the output sizes
> according to scalar inputs
> > or size of input matrix. But, if our output size depends on an element
> which is a part of matrix,
> > what can we do to assign the output size accordingly.
>
> The current code generation need a C-like arguments representation for the
> Scilab function to
> generate the good corresponding C function call. If you wish to have a
> more dynamic behavior to
> define the outputs argument you should probably need to
> serialize/deserialize them in some way to a
> raw vector.
>
> > 2) There are few functions whose output size has no relation to input
> matrix sizes, or they don't
> > follow any regular pattern. For example, they depend on rank of input
> matrix or something else.
> > For such functions, is there any work around to estimate the size first
> and assign accordingly in
> > the Tool Initialisation part.
>
> No currently in the Scilab2C code and with my limited understanding, there
> is no way to compute the
> number of / size of the arguments. This approach however is fully valid
> and is partially implemented
> in the Scilab 6 analysis pass. A completely rewritten Scilab2C could then
> use the propagated size /
> types constraints to handle theses dynamic functions. Could you give me a
> function you wish to add ?
>
> Thanks,
>
> --
> Clément
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