[Swig-user] Problems Installing Generated Module

[Mike E. <eas...@gm...>]

I have been successful in creating a module using SWIG by following the
tutorial posted on the website. However, when I try to import the module
into the interpreter, I get the error:



    >>> import calccrc

        Traceback (most recent call last):

           File "<stdin>", line 1, in <module>

        ImportError: dynamic module does not define init function
(initcalccrc)



Am I creating the interface file incorrectly?

Is the unsigned char* not being handled correctly by SWiG?

Do I need to make a complete program out of the C Source File, or make a
full class out of it?



Thanks for any help that can be given.



=-=-=-=-=-=-=-=-=-=- Details -=-=-=-=-=-=-=-=-=-=-=-= Module Name: calccrc



SWiG Interface File: calccrc.i

     /* calccrc.i */

     %module calccrc

     %{

     extern unsigned short calc_crc(int x, unsigned char *outbound_message);

     %}



     extern unsigned short calc_crc(int n, unsigned char *outbound_message);



C Source Code File: calccrc.c



        unsigned short calc_crc(int n,unsigned char *outbound_message)

        {

                unsigned char carry_flag;

                unsigned short crc=0xFFFF;

                int i, j;



                for (i = 0; i < n; i++)

                {

                        crc = crc ^ outbound_message[i];



                        for (j = 0; j < 8; j++)

                        {

                                carry_flag = crc & 0x01;

                                crc = crc >> 1;



                                if (carry_flag == 1)

                                {

                                        crc = crc ^ 0xA001;

                                }

                        }

                }



                return crc;

        }


-- 
Michael Easter
"In a world without fences and walls, there would be no need for Windows and
Gates"