Re: [Swig-user] Help to wrap a method with a std::vector argument

[debutant <mic...@ho...>]

Hello,

I tried to solve the typemap problem but there are still 
few things that I don't understand. I use a global function
rather than a class constructor.

Here is what was supposed to be a very simple example.

example.h:
#include <iostream>
#include <vector>

void globale_print(std::vector<int> vint)
{
  std::cout<<"globale print vecteur: ";
  for (size_t i=0; i<vint.size(); i++)
  {
    std::cout<<vint[i]<<" - ";
  }
  std::cout<<"\n";
}

example.i:
%module example

%{
#include "example.h"
#include "arrayobject.h"
%}

%typemap(in) std::vector<int> 
{
  PyArrayObject* aa=(PyArrayObject *) $input;
  $1.resize(aa->dimensions[0]);
  for (unsigned int i=0; i<aa->dimensions[0]; i++)
  {
    $1[i]= *(int *) (aa->data + i* aa->strides[0] );
  }
};

%include "example.h"


runme.py:
import example
import Numeric

array=Numeric.array(range(5))
print array
print type(array)

example.globale_print(array)



Like it is, it works. But there are a lot of things that I don't 
understand. 
If I want to make a check of aa, something like:
"""  
  if (!PyArray_Check(aa)) {
    return NULL;
  }
"""
  
the compilation of the wrapper is ok but when I run the python 
script runme.py, I have a segmentation fault because of the first line.

Here I really need help.
Please keep in mind that it is my first try to make a typemap ....

Thanks a lot
Michel


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