[AD] 64-bit intptr_t on WIndows

[Matthew Leverton <meffer@xxxxxxxxxx>]

Can we get something like the attached code added to Allegro 5 for
64-bit MSVC in the auto-guess types? It's taken from crtdefs.h, but I
don't think that entire file should be included, nor do I know which
compilers have it.

_WIN64 is automatically defined by 64-bit Windows compilers. The _W64
on the 32-bit one is just a portability warning and isn't strictly
necessary. I don't know if _W64 is commonly defined (as _w64) or not.

Obviously it could be shortened to checking for _WIN64 and #defining
intptr_t, but that won't play well with other Windows headers. And in
fact, the current 4.9 doesn't work well with Windows headers either
since it's not defining _INTPTR_T_DEFINED, etc. I don't think any of
the other types are defined by MSVC headers.

--
Matthew Leverton


#ifdef ALLEGRO_WINDOWS

#ifndef _INTPTR_T_DEFINED
#ifdef  _WIN64
typedef __int64             intptr_t;
#else
typedef _W64 int            intptr_t;
#endif
#define _INTPTR_T_DEFINED
#endif

#ifndef _UINTPTR_T_DEFINED
#ifdef  _WIN64
typedef unsigned __int64    uintptr_t;
#else
typedef _W64 unsigned int   uintptr_t;
#endif
#define _UINTPTR_T_DEFINED
#endif

#else

#define intptr_t     int32_t
#define uintptr_t    uint32_t

#endif