[Python-Dev] ssize_t branch merged

Travis Oliphant oliphant.travis at ieee.org
Sat Feb 18 02:37:32 CET 2006

Thomas Wouters wrote:
> On Fri, Feb 17, 2006 at 04:40:08PM -0700, Travis Oliphant wrote:
>>What is PY_SSIZE_T_MAX supposed to be?  The definition in pyport.h 
>>doesn't compile.

Maybe I have the wrong version of code.  In my pyport.h (checked out 
from svn trunk) I have.

#define PY_SSIZE_T_MAX ((Py_ssize_t)(((size_t)-1)>>1))

What is size_t?  Is this supposed to be sizeof(size_t)?

I get a syntax error when I actually use PY_SSIZE_T_MAX somewhere in the 

> While looking at the piece of code in Include/pyport.h I do notice that the
> fallback (when ssize_t is not available) is to Py_uintptr_t... Which is an
> unsigned type, while ssize_t is supposed to be signed. Martin, is that on
> purpose? I don't have any systems that lack ssize_t. ;P

I saw the same thing and figured it was an error.

> Adapting all code in the right way isn't finished yet (not in the last place
> because some of the code is... how shall I put it... 'creative'.)

I'm just trying to adapt my __index__ patch to use ssize_t.   I realize 
this was a big change and will take some "adjusting."  I can help with 
that if needed as I do have some experience here.  I just want to make 
sure I fully understand what issues Martin and others are concerned about.


More information about the Python-Dev mailing list