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Test PyLong import/export API on limited C API 3.15 and newer #211

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vstinner merged 2 commits into from
Nov 14, 2026
+20 −8
Merged

Test PyLong import/export API on limited C API 3.15 and newer #211

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c55a9b8
Test PyLong import/export API on limited C API 3.15 and newer
vstinner Nov 14, 2026
470fbf6
Update Py_HashPointer() doc
vstinner Nov 14, 2026
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2 changes: 2 additions & 0 deletions docs/api.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -525,6 +525,8 @@ Python 3.13

See `Py_HashPointer() documentation <https://docs.python.org/dev/c-api/hash.html#c.Py_HashPointer>`__.

Not available on the limited C API.

.. c:function:: Py_hash_t PyObject_GenericHash(PyObject *obj)

See `PyObject_GenericHash() documentation <https://docs.python.org/dev/c-api/hash.html#c.PyObject_GenericHash>`__.
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26 changes: 18 additions & 8 deletions tests/test_pythoncapi_compat_cext.c
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Expand Up @@ -1414,21 +1414,33 @@ test_dict_setdefault(PyObject *Py_UNUSED(module), PyObject *Py_UNUSED(args))
}


#if !defined(PYPY_VERSION) && !defined(Py_LIMITED_API)
#if ((!defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= _Py_PACK_VERSION(3, 15)) \
&& !defined(PYPY_VERSION))
static int
test_long_import_export()
{
// test import/export API
digit *digits;
// test PyLong import/export API

const PyLongLayout *layout = PyLong_GetNativeLayout();
assert(layout->digits_order == -1);
if (layout->digit_size != sizeof(uint32_t)) {
PyErr_SetString(PyExc_AssertionError,
"unsupported digit size");
return -1;
}

uint32_t *digits;
PyLongWriter *writer;
static PyLongExport long_export;

// test PyLongWriter_Discard()
writer = PyLongWriter_Create(1, 1, (void **)&digits);
if (writer == NULL) {
return -1;
}
PyLongWriter_Discard(writer);

// test PyLongWriter_Finish()
writer = PyLongWriter_Create(1, 1, (void **)&digits);
if (writer == NULL) {
return -1;
Expand Down Expand Up @@ -1467,7 +1479,7 @@ test_long_import_export()
return -1;
}
assert(long_export.value == 0);
digits = (digit*)long_export.digits;
digits = (uint32_t*)long_export.digits;
assert(digits[0] == 1);
assert(digits[1] == 0);
assert(digits[2] == 0);
Expand All @@ -1476,9 +1488,6 @@ test_long_import_export()
PyLong_FreeExport(&long_export);
Py_DECREF(obj);

const PyLongLayout *layout = PyLong_GetNativeLayout();
assert(layout->digits_order == -1);
assert(layout->digit_size == sizeof(digit));
return 0;
}
#endif
Expand Down Expand Up @@ -1519,7 +1528,8 @@ test_long_api(PyObject *Py_UNUSED(module), PyObject *Py_UNUSED(args))
assert(PyLong_IsNegative(obj) == 0);
assert(PyLong_IsZero(obj) == 0);

#if !defined(PYPY_VERSION) && !defined(Py_LIMITED_API)
#if ((!defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= _Py_PACK_VERSION(3, 15)) \
&& !defined(PYPY_VERSION))
if (test_long_import_export() < 0) {
return NULL;
}
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