Hi, I'm making a trying to bind a gsl library http://www.gnu.org/software/gsl/ so far it was working but when i started binding complex numbers some functions won't work, like trigonometric functions - called they return null.

in gsl code complex struct looks like:

typedef struct
  {
    double dat[2];
  }
gsl_complex;


my complex struct looks like that:

struct _gsl_complex {
  double dat[2];
}
alias gsl_complex = _gsl_complex*;

So, what im doing wrong?

On 25.11.2015 19:11, Radek wrote:
> Hi, I'm making a trying to bind a gsl library
> http://www.gnu.org/software/gsl/ so far it was working but when i
> started binding complex numbers some functions won't work, like
> trigonometric functions - called they return null.
>
> in gsl code complex struct looks like:
>
> typedef struct
>    {
>      double dat[2];
>    }
> gsl_complex;
>
>
> my complex struct looks like that:
>
> struct _gsl_complex {
>    double dat[2];
> }
> alias gsl_complex = _gsl_complex*;
>
> So, what im doing wrong?
A little bit offtopic but do you know about https://github.com/abrown25/gsld? It would be nice to join efforts.

i have found bug. It shoul be
alias gsl_complex = _gsl_complex;
not
alias gsl_complex = _gsl_complex*;

On Wednesday, 25 November 2015 at 16:35:06 UTC, drug wrote:
> A little bit offtopic but do you know about https://github.com/abrown25/gsld? It would be nice to join efforts.

Sure, I'll share my code :)

Ask me next month. That what I'm doing is my student project and first i need to complete it :)

On Wednesday, 25 November 2015 at 16:11:56 UTC, Radek wrote:
> Hi, I'm making a trying to bind a gsl library http://www.gnu.org/software/gsl/ so far it was working but when i started binding complex numbers some functions won't work, like trigonometric functions - called they return null.
>
> in gsl code complex struct looks like:
>
> typedef struct
>   {
>     double dat[2];
>   }
> gsl_complex;
>
>
> my complex struct looks like that:
>
> struct _gsl_complex {
>   double dat[2];
> }
> alias gsl_complex = _gsl_complex*;
>
> So, what im doing wrong?

I believe if you're interfacing with C you should use __gshared:

alias gsl_complex = __gshared _gsl_complex*;

bye,
lobo

On 11/25/15 17:11, Radek via Digitalmars-d-learn wrote:
> Hi, I'm making a trying to bind a gsl library http://www.gnu.org/software/gsl/ so far it was working but when i started binding complex numbers some functions won't work, like trigonometric functions - called they return null.
> 
> in gsl code complex struct looks like:
> 
> typedef struct
>   {
>     double dat[2];
>   }
> gsl_complex;
> 
> 
> my complex struct looks like that:
> 
> struct _gsl_complex {
>   double dat[2];
> }
> alias gsl_complex = _gsl_complex*;
> 
> So, what im doing wrong?

That's not a struct but a pointer to a struct.

Also, you can just drop the `typedef` hack (which is used in C to avoid having to type the 'struct' keyword), so:

   struct gsl_complex {
      double[2] dat;
   }

artur

On Wednesday, 25 November 2015 at 16:45:51 UTC, Radek wrote:
> i have found bug. It shoul be
> alias gsl_complex = _gsl_complex;
> not
> alias gsl_complex = _gsl_complex*;
>
> On Wednesday, 25 November 2015 at 16:35:06 UTC, drug wrote:
>> A little bit offtopic but do you know about https://github.com/abrown25/gsld? It would be nice to join efforts.
>
> Sure, I'll share my code :)
>
> Ask me next month. That what I'm doing is my student project and first i need to complete it :)

Hi, I've been a little slow updating that repository because of work, and I got a little stuck with function pointers, I hope to get back to it soon. It would be lovely if it's all finished by that time :)