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GH-101291: Rearrange the size bits in PyLongObject (GH-102464)

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* Eliminate all remaining uses of Py_SIZE and Py_SET_SIZE on PyLongObject, adding asserts.

* Change layout of size/sign bits in longobject to support future addition of immortal ints and tagged medium ints.

* Add functions to hide some internals of long object, and for setting sign and digit count.

* Replace uses of IS_MEDIUM_VALUE macro with _PyLong_IsCompact().
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Mark Shannon 2023-03-22 14:49:51 +00:00 • committed by GitHub
parent 713df2c534
commit 7559f5fda9
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25 changed files with 982 additions and 898 deletions
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6
Include/cpython/longintrepr.h
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@ -80,7 +80,7 @@ typedef long stwodigits; /* signed variant of twodigits */
*/
typedef struct _PyLongValue {
Py_ssize_t ob_size; /* Number of items in variable part */
uintptr_t lv_tag; /* Number of digits, sign and flags */
digit ob_digit[1];
} _PyLongValue;
@ -94,6 +94,10 @@ PyAPI_FUNC(PyLongObject *) _PyLong_New(Py_ssize_t);
/* Return a copy of src. */
PyAPI_FUNC(PyObject *) _PyLong_Copy(PyLongObject *src);
PyAPI_FUNC(PyLongObject *)
_PyLong_FromDigits(int negative, Py_ssize_t digit_count, digit *digits);
#ifdef __cplusplus
}
#endif