/pypy/translator/c/src/commondefs.h

/************************************************************/
 /***  C header subsection: common types and macros        ***/


/* We only support the following two kinds of platform:

                 int     long     long long     void*
   --32-bit--    32      32         64          32
   --64-bit--    32      64         64          64

   In particular, Win64 is not supported because it has sizeof(long) == 4.
   To fix this, find and review all the places that cast a pointer to a long.

   Update:
   We are trying to lift this restriction for Win64:

   Win64         int     long     long long     void*
   --64-bit--    32      32         64          64

   The migration to this platform is complicated and tedious, because
   PyPy assumes that a void* fits into a long. Therefore, the created PyPy
   will (first) have a 64 bit int type. The dependency of sys.maxint must
   be removed in very many places, and the distinction between Python int
   and long must be changed in explicit range checks.

   This is work in progress with first successes.

*/

#include <limits.h>

#ifndef LLONG_MAX
#define LLONG_MAX __LONG_LONG_MAX__
#endif
#ifndef LLONG_MIN
#define LLONG_MIN (-LLONG_MAX - 1LL)
#endif

#if INT_MAX != 2147483647
#  error "unsupported value for INT_MAX"
#endif
#if INT_MIN != -2147483647-1
#  error "unsupported value for INT_MIN"
#endif

#if LLONG_MAX != 9223372036854775807LL
#  error "unsupported value for LLONG_MAX"
#endif
#if LLONG_MIN != -9223372036854775807LL-1LL
#  error "unsupported value for LLONG_MIN"
#endif


/******************** 32-bit support ********************/
#if PYPY_LONG_BIT == 32

#  if LONG_MAX != 2147483647L
#    error "error in LONG_MAX (32-bit sources but a 64-bit compiler?)"
#  endif
#  if LONG_MIN != -2147483647L-1L
#    error "unsupported value for LONG_MIN"
#  endif

#  define SIZEOF_INT        4
#  define SIZEOF_LONG       4
#  define SIZEOF_LONG_LONG  8

/******************** 64-bit support ********************/
#else

#  ifndef _WIN64
#    if LONG_MAX != 9223372036854775807L
#      error "error in LONG_MAX (64-bit sources but a 32-bit compiler?)"
#    endif
#    if LONG_MIN != -9223372036854775807L-1L
#      error "unsupported value for LONG_MIN"
#    endif

#    define SIZEOF_INT        4
#    define SIZEOF_LONG       8
#    define SIZEOF_LONG_LONG  8

/******************** Win-64 support ********************/
#  else
#    if LONG_MAX != 2147483647L
#      error "error in LONG_MAX (64-bit sources but incompatible compiler?)"
#    endif
#    if LONG_MIN != -2147483647L-1L
#      error "unsupported value for LONG_MIN"
#    endif

#    define SIZEOF_INT        4
#    define SIZEOF_LONG       4
#    define SIZEOF_LONG_LONG  8

#  endif

#endif

/********************************************************/

#if ((-1) >> 1) > 0
#  define Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J) \
	  ((I) < 0 ? -1-((-1-(I)) >> (J)) : (I) >> (J))
#elif ((-1) >> 1) == -1
#  define Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J) ((I) >> (J))
#else
#  error "uh? strange result"
#endif

#define HAVE_LONG_LONG 1
#define Py_HUGE_VAL HUGE_VAL

#ifdef _WIN32
#ifndef MS_WINDOWS
#  define MS_WINDOWS    /* a synonym */
#endif
#endif