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bpo-46906: Add PyFloat_Pack8() to the C API (GH-31657)

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Add new functions to pack and unpack C double (serialize and
deserialize):

* PyFloat_Pack2(), PyFloat_Pack4(), PyFloat_Pack8()
* PyFloat_Unpack2(), PyFloat_Unpack4(), PyFloat_Unpack8()

Document these functions and add unit tests.

Rename private functions and move them from the internal C API
to the public C API:

* _PyFloat_Pack2() => PyFloat_Pack2()
* _PyFloat_Pack4() => PyFloat_Pack4()
* _PyFloat_Pack8() => PyFloat_Pack8()
* _PyFloat_Unpack2() => PyFloat_Unpack2()
* _PyFloat_Unpack4() => PyFloat_Unpack4()
* _PyFloat_Unpack8() => PyFloat_Unpack8()

Replace the "unsigned char*" type with "char*" which is more common
and easy to use.
This commit is contained in:
Victor Stinner 2022-03-12 00:10:02 +01:00 • committed by GitHub
parent ecfff63e06
commit 882d8096c2
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13 changed files with 294 additions and 91 deletions
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6
Doc/whatsnew/3.11.rst
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@ -766,6 +766,12 @@ New Features
available directly (via :c:type:`PyCMethod`).
(Contributed by Petr Viktorin in :issue:`46613`.)
* Add new functions to pack and unpack C double (serialize and deserialize):
:c:func:`PyFloat_Pack2`, :c:func:`PyFloat_Pack4`, :c:func:`PyFloat_Pack8`,
:c:func:`PyFloat_Unpack2`, :c:func:`PyFloat_Unpack4` and
:c:func:`PyFloat_Unpack8`.
(Contributed by Victor Stinner in :issue:`46906`.)
Porting to Python 3.11
----------------------