Close #13072: Restore code before the PEP 393 for the array module

'u' format of the array module uses again Py_UNICODE type for backward
compatibility with Python 3.2.

The only change from Python 3.2 is that PyUnicode_AsUnicode() result is now
checked for NULL value.

1 files changed, 8 insertions, 3 deletions

diff --git a/Doc/library/array.rst b/Doc/library/array.rst
index 3e275a2..2eb926c 100644
--- a/Doc/library/array.rst
+++ b/Doc/library/array.rst
@@ -21,7 +21,7 @@ defined:
 +-----------+--------------------+-------------------+-----------------------+-------+
 | ``'B'``   | unsigned char      | int               | 1                     |       |
 +-----------+--------------------+-------------------+-----------------------+-------+
-| ``'u'``   | Py_UCS4            | Unicode character | 4                     |       |
+| ``'u'``   | Py_UNICODE         | Unicode character | 2                     | \(1)  |
 +-----------+--------------------+-------------------+-----------------------+-------+
 | ``'h'``   | signed short       | int               | 2                     |       |
 +-----------+--------------------+-------------------+-----------------------+-------+
@@ -35,9 +35,9 @@ defined:
 +-----------+--------------------+-------------------+-----------------------+-------+
 | ``'L'``   | unsigned long      | int               | 4                     |       |
 +-----------+--------------------+-------------------+-----------------------+-------+
-| ``'q'``   | signed long long   | int               | 8                     | \(1)  |
+| ``'q'``   | signed long long   | int               | 8                     | \(2)  |
 +-----------+--------------------+-------------------+-----------------------+-------+
-| ``'Q'``   | unsigned long long | int               | 8                     | \(1)  |
+| ``'Q'``   | unsigned long long | int               | 8                     | \(2)  |
 +-----------+--------------------+-------------------+-----------------------+-------+
 | ``'f'``   | float              | float             | 4                     |       |
 +-----------+--------------------+-------------------+-----------------------+-------+
@@ -47,6 +47,11 @@ defined:
 Notes:
 
 (1)
+   The ``'u'`` type code corresponds to Python's unicode character
+   (:c:type:`Py_UNICODE` which is :c:type:`wchar_t`). Depending on the
+   platform, it can be 16 bits or 32 bits.
+
+(2)
    The ``'q'`` and ``'Q'`` type codes are available only if
    the platform C compiler used to build Python supports C :c:type:`long long`,
    or, on Windows, :c:type:`__int64`.