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gh-111389: expose _PyHASH_INF/BITS/MODULUS/IMAG macros as public#111418

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0ce377a
gh-111389: restoring _PyHASH_INF/BITS/MODULUS/IMAG macroses as public
skirpichevOct 28, 2023
2c6002f
Mention public macros in docs
skirpichevOct 29, 2023
5c42cae
Revert "Mention public macros in docs"
skirpichevOct 30, 2023
de4e3ae
Add Doc/c-api/hashing.rst for hash-related C macros
skirpichevOct 30, 2023
1a50a7b
Expose macroses as unstable API
skirpichevOct 31, 2023
ebe7604
Merge branch 'main' into restore-pyhash-and-pylongnew
skirpichevNov 15, 2023
b7a7ce3
Merge branch 'main' into restore-pyhash-and-pylongnew
skirpichevNov 15, 2023
7080fa9
Expose macros as public and move docs to Doc/c-api/hash.rst
skirpichevNov 15, 2023
9fcd93e
news entry
skirpichevNov 15, 2023
0cc4ff3
restore link to hashing algorithms
skirpichevNov 15, 2023
d978fdb
Merge branch 'main' into restore-pyhash-and-pylongnew
skirpichevNov 16, 2023
00bc891
Update Misc/NEWS.d/next/C API/2023-11-15-09-24-51.gh-issue-111418.FYY…
skirpichevNov 16, 2023
6aaa610
address review: versionadded
skirpichevNov 16, 2023
a8dec64
Move to Include/cpython/pyhash.h
skirpichevNov 16, 2023
d3a61ce
docs nitpick
skirpichevNov 16, 2023
1f3b623
Apply suggestions from code review
skirpichevMar 8, 2024
1dd0fe7
Apply suggestions from review: keep deprecated names as aliases
skirpichevMar 8, 2024
553c663
Add comment
skirpichevMar 8, 2024
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25 changes: 24 additions & 1 deletionDoc/c-api/hash.rst
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Expand Up@@ -3,7 +3,7 @@
PyHash API
----------

See also the :c:member:`PyTypeObject.tp_hash` member.
See also the :c:member:`PyTypeObject.tp_hash` member and :ref:`numeric-hash`.

.. c:type:: Py_hash_t

Expand All@@ -17,6 +17,29 @@ See also the :c:member:`PyTypeObject.tp_hash` member.

.. versionadded:: 3.2

.. c:macro:: PyHASH_MODULUS

The Mersenne prime ``P = 2**n -1``, used for numeric hash scheme.

.. versionadded:: 3.13

.. c:macro:: PyHASH_BITS

The exponent ``n`` of ``P``.

.. versionadded:: 3.13

.. c:macro:: PyHASH_INF

The hash value returned for a positive infinity.

.. versionadded:: 3.13

.. c:macro:: PyHASH_IMAG

The multiplier used for the imaginary part of a complex number.

.. versionadded:: 3.13

.. c:type:: PyHash_FuncDef

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5 changes: 5 additions & 0 deletionsInclude/cpython/pyhash.h
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Expand Up@@ -15,9 +15,14 @@
# define_PyHASH_BITS 31
#endif

#definePyHASH_BITS _PyHASH_BITS

#define_PyHASH_MODULUS (((size_t)1 << _PyHASH_BITS) - 1)
#definePyHASH_MODULUS _PyHASH_MODULUS
#define_PyHASH_INF 314159
#definePyHASH_INF _PyHASH_INF
#define_PyHASH_IMAG _PyHASH_MULTIPLIER
#definePyHASH_IMAG _PyHASH_IMAG

/* Helpers for hash functions */
PyAPI_FUNC(Py_hash_t)_Py_HashDouble(PyObject*,double);
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@@ -0,0 +1,2 @@
Add :c:macro:`PyHASH_MODULUS`, :c:macro:`PyHASH_BITS`, :c:macro:`PyHASH_INF`
and :c:macro:`PyHASH_IMAG` C macros. Patch by Sergey B Kirpichev.
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