[Python-Dev] Re: [Python-checkins] python/dist/src/Objects unicodeobject.c, 2.197, 2.198

[Jeremy Hylton]

On Wed, 2003-09-17 at 20:22, Tim Peters wrote:
> It could be, but if so Jeremy is running on a mainstream Linux+gcc platform
> and then it's something we can't really wish away.  Jeremy, can you tell us
> what Py_UNICODE resolves to on your box, or give enough details so someone
> else can figure it out?
> 
> As I read the C standard,
> 
>      unsigned_int < 256
> 
> has to use unsigned comparison, so it's a compiler bug, or I'm misreading
> the standard, or Jeremy was mistaken in believing Py_UNICODE resolves to an
> unsigned thingie on his box (we know for sure that the bit pattern
> 0xcdcdcdcd compared less than 256 on his box; that's obviously what it
> should do if Py_UNICODE resolves to a signed 4-byte thing on his box, but
> not otherwise).

I was a little confused by the various UNICODE macros.  (Is there a
comment block somewhere that explains what they are for?)

gcc -E tells me:

typedef unsigned int Py_UCS4;
typedef wchar_t Py_UNICODE;
typedef long int wchar_t;

(not necessarily in that order)

I got Py_UCS4 and Py_UNICODE confused.  The detailed output confirms
that Py_UNICODE is a signed long int.

Jeremy