[Pyrex] How could I embed/inline a small piece of c code in pyrex file?

Mon Mar 13 12:12:18 CET 2006

I don't know any way of including inline code.
What I have done is this

Put your inline code into a C function  'Myfct'
and put the complete function definition into
a file  'MyCcode.h'

Then put the following 2 lines into your Pyrex code

cdef extern from "MyCcode.h"
  <here repeat just the declaration of Myfct>

Then you can call 'Myfct' in any of your Pyrex functions

Helmut.

On 13 Mar, Yong Sun wrote:
> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
> <html>
> <head>
>   <meta content="text/html;charset=UTF-8" http-equiv="Content-Type">
> </head>
> <body bgcolor="#ffffff" text="#000000">
> Hi, guys,<br>
> <br>
> I am writing a python module for X record extension. I have a callback
> need to access the data member of xEvent:<br>
> <blockquote>cdef void _event_callback_wrapper (XPointer priv,
> XRecordInterceptData *hook):<br>
>     cdef xEvent *data<br>
>     data = &lt;xEvent*&gt; hook.data<br>
>     if (hook.category != XRecordFromServer):<br>
>         XRecordFreeData (hook)<br>
>         return<br>
>     ... ...<br>
> </blockquote>
> In order to access the members of one xEvent structure, I need declare
> it as:<br>
> <blockquote>cdef extern from "X11/Xproto.h":<br>
>     ctypedef struct xEvent<br>
>         ... ...<br>
>         ... ...<br>
> </blockquote>
> Then I could use xEvent.member instead of xEvent-&gt;member to access
> the members.<br>
> <br>
> However, the xEvent definition is too long and too complex, I am
> wondering could I directly inline a small piece of c code to access
> this structure, if I can ensure the reference counting or other issues?
> <br>
> <br>
> Just like the following:<br>
> <blockquote>cdef void _event_callback_wrapper (XPointer priv,
> XRecordInterceptData *hook):<br>
>     cdef xEvent *data<br>
>     data = &lt;xEvent*&gt; hook.data<br>
>     if (hook.category != XRecordFromServer):<br>
>         XRecordFreeData (hook)<br>
>         return<br>
>     ''' inline c code:<br>
>     switch (data-&gt;type) {<br>
>     case KeyPress:<br>
>     case KeyRelease:<br>
>     ... ...<br>
>     }<br>
>     '''<br>
> </blockquote>
> Regards,<br>
> <br>
> </body>
> </html>
> 

-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany