From: Lyle Johnson <lyle@...>
Date: 2003-05-06T00:18:24+09:00
Subject: Re: SWIG on Solaris problem

Jim Freeze wrote:

> Ok, so, let me change things a bit here. The fact2 code was just
> to do a test to see why int* did not work. I am really trying
> to wrap the itkDB library. The function is defined as:
> 
>  dbInit(int *pnArgs, char **pString);
>  
>  (or dbInit(int *pnArgs, String *pString);
>   where typdef char * String;)
> 
>  I expect to call it from ruby as:
> 
>  require 'itkdb'
>  Itkdb.dbInit(1, "some_path")

OK, this is getting a little trickier. Try this typemap:

     %module example

     %typemap(in) (int *pnArgs, String *pString) (int temp, int i) {
         Check_Type($input, T_ARRAY);
         temp = RARRAY($input)->len;
         $1 = &temp;
         $2 = (String *) malloc(sizeof(String));
         for (i = 0; i < $1; i++) {
             $2[i] = StringValuePtr(rb_ary_entry($input, i));
         }
     }

     %typemap(freearg) String *pString {
         free((void *) pString);
     }

     void dbInit(int *pnArgs, String *pString);

Hope this helps,

Lyle