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[3.13] gh-119336: Restore removed _PyLong_NumBits() function (GH-119418) (#119970)

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gh-119336: Restore removed _PyLong_NumBits() function (GH-119418)

It is used by the pywin32 project.
(cherry picked from commit e50fac96e8)

Co-authored-by: Ethan Smith <ethan@ethanhs.me>
This commit is contained in:
Miss Islington (bot) 2024-06-03 11:29:07 +02:00 • committed by GitHub
parent c3fc3a2db8
commit cc663b7e25
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3 changed files with 10 additions and 11 deletions
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9
Include/cpython/longobject.h
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@ -60,6 +60,15 @@ PyAPI_FUNC(Py_ssize_t) PyUnstable_Long_CompactValue(const PyLongObject* op);
// There are no error cases.
PyAPI_FUNC(int) _PyLong_Sign(PyObject *v);
/* _PyLong_NumBits. Return the number of bits needed to represent the
absolute value of a long. For example, this returns 1 for 1 and -1, 2
for 2 and -2, and 2 for 3 and -3. It returns 0 for 0.
v must not be NULL, and must be a normalized long.
(size_t)-1 is returned and OverflowError set if the true result doesn't
fit in a size_t.
*/
PyAPI_FUNC(size_t) _PyLong_NumBits(PyObject *v);
/* _PyLong_FromByteArray: View the n unsigned bytes as a binary integer in
base 256, and return a Python int with the same numeric value.
If n is 0, the integer is 0. Else:

11
Include/internal/pycore_long.h
View file

@ -47,17 +47,6 @@ extern "C" {
# error "_PY_LONG_DEFAULT_MAX_STR_DIGITS smaller than threshold."
#endif
// _PyLong_NumBits. Return the number of bits needed to represent the
// absolute value of a long. For example, this returns 1 for 1 and -1, 2
// for 2 and -2, and 2 for 3 and -3. It returns 0 for 0.
// v must not be NULL, and must be a normalized long.
// (size_t)-1 is returned and OverflowError set if the true result doesn't
// fit in a size_t.
//
// Export for 'math' shared extension.
PyAPI_FUNC(size_t) _PyLong_NumBits(PyObject *v);
/* runtime lifecycle */
extern PyStatus _PyLong_InitTypes(PyInterpreterState *);

1
Misc/NEWS.d/next/C API/2024-05-22-17-50-48.gh-issue-119336.ff3qnS.rst Normal file
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@ -0,0 +1 @@
Restore the removed ``_PyLong_NumBits()`` function. It is used by the pywin32 project. Patch by Ethan Smith