[Cython] a problem with sizeof() return type

[Dag Sverre Seljebotn]

Michael Abshoff wrote:
> Jason Evans wrote:
>>      cdef extern from "sys/types.h":
>>          ctypedef unsigned long size_t
> 
> 
> Well, make it unsigned long long on 64 bit Windows and it ought to work 
> nearly everywhere. I am not aware of any LLP64 bit OS that Cython 
> supports besides 64 bit Windows. Obviously there is no sys/types.h on 
> Windows, but that is a different story :)

Just a slightly related note:

Note that with this kind of declaration, all Cython uses in 90% of the 
situations is the fact that it is an unsigned integral type. "unsigned 
char size_t" it will do the same in almost all situations -- in the end, 
"size_t" is simply emitted to the .c file.

The 10% is overflow exceptions from coercion from Python integer -- and 
pushing that decision too to the C compiler is on my personal todo-list 
(though far down). In general Cython prefers to leave knowledge of the 
size/capacity of types to the C compiler.

-- 
Dag Sverre