From: barabba <igor.sarzisartori@...>
Date: 2007-03-18T05:40:06+09:00
Subject: Re: SWIG typemap for ta-lib

On Mar 15, 1:52 pm, "BENI" <rajib.chakraba...@googlemail.com> wrote:
> I got  most of your points.
>
> I am still confused  with TA_RetCode
>
> I am being  bugged by the compiler
>
> C:\talib\ta-lib\swig\ide\msvc\talibruby\rubytalibdll
> \rubytalib_wrap.c(1623) : error C2065: 'TA_RetCode' : undeclared
> identifier
>
> How do I make SWIG aware of my TA_Retcode type?
>
> am I making some mistake pertaining to header inclusion in .i file ?
>
> a snap of my wrap fn
>
> ===========================================
> ==========================================
> SWIGINTERN VALUE
> _wrap_TA_MA(int argc, VALUE *argv, VALUE self) {
>   int arg1 ;
>   int arg2 ;
>   double *arg3 ;
>   int arg4 ;
>   int arg5 ;
>   int *arg6 = (int *) 0 ;
>   int *arg7 = (int *) 0 ;
>   double *arg8 ;
>   TA_RetCode result; /* I did not get it here */
>   int val4 ;
>   int ecode4 = 0 ;
>   VALUE vresult = Qnil;
>
>   if ((argc < 3) || (argc > 3)) {
>     rb_raise(rb_eArgError, "wrong # of arguments(%d for 3)",argc);
> SWIG_fail;
>   }
>   {
>     Check_Type(argv[0], T_ARRAY);
>
>     /* Get the length of the array */
>     int size = RARRAY(argv[0])->len;
>     int i;
>     arg3 = (unsigned char*) malloc(size * sizeof(double));
>     arg2 = size;
>     arg1 = 0;
>
>     // copy the ruby array in the new allocated buffer
>     /* Get the first element in memory */
>     VALUE *ptr = RARRAY(argv[0])->ptr;
>     for (i=0; i < size; i++, ptr++)
>     {
>       /* Convert Ruby Object Fixnum to unsigned char */
>       arg1[i]= NUM2DBL(*ptr);
>     }
>
>   }
>   ecode4 = SWIG_AsVal_int(argv[1], &val4);
>   if (!SWIG_IsOK(ecode4)) {
>     SWIG_exception_fail(SWIG_ArgError(ecode4), "in method '" "TA_MA"
> "', argument " "4"" of type '" "int""'");
>   }
>   arg4 = (int)(val4);
>   {
>     int out_beg_ix = 0;
>     int out_n_ele = 0;
>     double arr_res[400];
>
>     arg5 = NUM2INT(optInMAType);
>     arg6 = &out_beg_ix;
>     arg7 = &out_n_ele;
>     arg8 = arr_res;
>
>   }
>   result = TA_MA(arg1,arg2,(double const
> (*))arg3,arg4,arg5,arg6,arg7,arg8);
>   {
>     int iStartIx = *arg6;
>     int iLen = iStartIx + *arg7;
>
>     VALUE arr = rb_ary_new2(iLen);
>
>     for ( int i = iStartIx; i < iLen;  i++ )
>     rb_ary_push(arr, INT2FIX((*arg8)[i]));
>     vresult = arr;
>
>   }
>   return vresult;
> fail:
>   return Qnil;
>
> }
>
> Thanks
>
> Regards

for TA_RetCode you have to declare in .i file the header file where
TA_RetCode is defined. After %module declaration in .i you can use
%{

#include "xxxxxTA_RetCodeincludefile.h"
This to  avoid compiler error in your wrap function.

To export TA_RetCode to ruby you can use, at the end of .i file, this
declaration:
%include "xxxxxTA_RetCodeincludefile.h"