[Python-Dev] Adventures with x64, VS7 and VS8 on Windows

[M.-A. Lemburg]

On 2007-05-21 12:30, Kristján Valur Jónsson wrote:
>>
>> [Py_UNICODE being #defined as "unsigned short" on Windows]
>>
>> I'd rather make it a platform-specific definition (for platform=Windows
>> API). Correct me if I'm wrong, but isn't wchar_t also available in VS
>> 2003 (and even in VC6?). And doesn't it have the "right" definition in
>> all these compilers?
>>
>> So +1 for setting Py_UNICODE to wchar_t on Windows.
> 
> Yes.  Btw, in previous visual studio versions, wchar_t was not treated
> as a builtin type by default, but rather as synonymous with unsighed short.
> Now the default is that it is, and this causes some semantic differences
> and incompatibilities of the type seen.

+1 from me.

If think this is simply a bug introduced with the UCS4 patches in
Python 2.2.

unicodeobject.h already has this code:

#ifndef PY_UNICODE_TYPE

/* Windows has a usable wchar_t type (unless we're using UCS-4) */
# if defined(MS_WIN32) && Py_UNICODE_SIZE == 2
#  define HAVE_USABLE_WCHAR_T
#  define PY_UNICODE_TYPE wchar_t
# endif

# if defined(Py_UNICODE_WIDE)
#  define PY_UNICODE_TYPE Py_UCS4
# endif

#endif

But for some reason, pyconfig.h defines:

/* Define as the integral type used for Unicode representation. */
#define PY_UNICODE_TYPE unsigned short

/* Define as the size of the unicode type. */
#define Py_UNICODE_SIZE SIZEOF_SHORT

/* Define if you have a useable wchar_t type defined in wchar.h; useable
   means wchar_t must be 16-bit unsigned type. (see
   Include/unicodeobject.h). */
#if Py_UNICODE_SIZE == 2
#define HAVE_USABLE_WCHAR_T
#endif

disabling the default settings in the unicodeobject.h.

-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, May 21 2007)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::


   eGenix.com Software, Skills and Services GmbH  Pastor-Loeh-Str.48
    D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg
           Registered at Amtsgericht Duesseldorf: HRB 46611