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39 lines
2.2 KiB
ReStructuredText
39 lines
2.2 KiB
ReStructuredText
.. highlight:: c
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.. _apiabiversion:
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***********************
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API and ABI Versioning
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***********************
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``PY_VERSION_HEX`` is the Python version number encoded in a single integer.
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For example if the ``PY_VERSION_HEX`` is set to ``0x030401a2``, the underlying
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version information can be found by treating it as a 32 bit number in
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the following manner:
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+-------+-------------------------+------------------------------------------------+
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| Bytes | Bits (big endian order) | Meaning |
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+=======+=========================+================================================+
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| ``1`` | ``1-8`` | ``PY_MAJOR_VERSION`` (the ``3`` in |
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| | | ``3.4.1a2``) |
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+-------+-------------------------+------------------------------------------------+
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| ``2`` | ``9-16`` | ``PY_MINOR_VERSION`` (the ``4`` in |
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| | | ``3.4.1a2``) |
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+-------+-------------------------+------------------------------------------------+
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| ``3`` | ``17-24`` | ``PY_MICRO_VERSION`` (the ``1`` in |
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| | | ``3.4.1a2``) |
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+-------+-------------------------+------------------------------------------------+
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| ``4`` | ``25-28`` | ``PY_RELEASE_LEVEL`` (``0xA`` for alpha, |
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| | | ``0xB`` for beta, ``0xC`` for release |
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| | | candidate and ``0xF`` for final), in this |
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| | | case it is alpha. |
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+-------+-------------------------+------------------------------------------------+
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| | ``29-32`` | ``PY_RELEASE_SERIAL`` (the ``2`` in |
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| | | ``3.4.1a2``, zero for final releases) |
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+-------+-------------------------+------------------------------------------------+
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Thus ``3.4.1a2`` is hexversion ``0x030401a2``.
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All the given macros are defined in :source:`Include/patchlevel.h`.
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