New submission from Thomas Heller <[email protected]>:
ctypes Structure fields of type c_char_p or c_wchar_p used to accept strings
with embedded null characters. I noticed that Python 3.6.4 does refuse them.
It seems this has been changed in recent version(s).
There ARE use-cases for this: The Windows-API OPENFILENAME structure is one
example. The Microsoft docs for the lpstrFilter field:
"""
lpstrFilter
Type: LPCTSTR
A buffer containing pairs of null-terminated filter strings. The last
string in the buffer must be terminated by two NULL characters.
"""
I have attached a simple script which demonstrates this new behaviour; the
output with Python 3.6.4 is this:
Traceback (most recent call last):
File "nullchars.py", line 8, in <module>
t.unicode = u"foo\0bar"
ValueError: embedded null character
----------
components: ctypes
files: nullchars.py
keywords: 3.6regression
messages: 311462
nosy: theller
priority: normal
severity: normal
status: open
title: ctypes string pointer fields should accept embedded null characters
versions: Python 3.6
Added file: https://bugs.python.org/file47420/nullchars.py
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<https://bugs.python.org/issue32745>
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