[issue37536] ctypes.create_string_buffer fails on windows with non-BMP characters

[Ryan McCampbell]

New submission from Ryan McCampbell <rmccampbell7 at gmail.com>:

The ctypes.create_string_buffer function uses the length of the string to create the buffer if no size is provided. Since windows wide chars are UTF-16 the buffer may actually need to be larger to store surrogate pairs. This code crashes on windows:

>>> create_unicode_buffer('\U00010000\U00010000')
ValueError: string too long

----------
messages: 347600
nosy: rmccampbell7
priority: normal
severity: normal
status: open
title: ctypes.create_string_buffer fails on windows with non-BMP characters

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37536>
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