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gh-82616: Add Py_IS_TYPE_SIGNED() macro (#93178)

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_posixsubprocess: add a static assertion to ensure that the pid_t
type is signed.

Replace _Py_IntegralTypeSigned() with _Py_IS_TYPE_SIGNED().
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Victor Stinner 2022-05-27 15:05:35 +02:00 • committed by GitHub
parent cb04a09d2d
commit 22b75d9bef
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4 changed files with 25 additions and 7 deletions
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8
Include/internal/pycore_pymath.h
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@ -56,17 +56,13 @@ static inline void _Py_ADJUST_ERANGE2(double x, double y)
}
}
// Return whether integral type *type* is signed or not.
#define _Py_IntegralTypeSigned(type) \
((type)(-1) < 0)
// Return the maximum value of integral type *type*.
#define _Py_IntegralTypeMax(type) \
((_Py_IntegralTypeSigned(type)) ? (((((type)1 << (sizeof(type)*CHAR_BIT - 2)) - 1) << 1) + 1) : ~(type)0)
(_Py_IS_TYPE_SIGNED(type) ? (((((type)1 << (sizeof(type)*CHAR_BIT - 2)) - 1) << 1) + 1) : ~(type)0)
// Return the minimum value of integral type *type*.
#define _Py_IntegralTypeMin(type) \
((_Py_IntegralTypeSigned(type)) ? -_Py_IntegralTypeMax(type) - 1 : 0)
(_Py_IS_TYPE_SIGNED(type) ? -_Py_IntegralTypeMax(type) - 1 : 0)
// Check whether *v* is in the range of integral type *type*. This is most
// useful if *v* is floating-point, since demoting a floating-point *v* to an