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Workaround embedded null character (#18)

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Workaround embedded null characters in strings.  This fixes 17.
This commit is contained in:
Andrew Senetar 2017-11-01 07:28:22 -05:00 committed by Virgil Dupras
parent 22ed5dc09b
commit 5733670fc2
1 changed files with 15 additions and 2 deletions
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17
send2trash/plat_win.py
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@ -6,7 +6,8 @@
from __future__ import unicode_literals
from ctypes import windll, Structure, byref, c_uint
from ctypes import (windll, Structure, byref, c_uint,
create_unicode_buffer, sizeof, addressof)
from ctypes.wintypes import HWND, UINT, LPCWSTR, BOOL
import os.path as op
@ -46,7 +47,19 @@ def send2trash(path):
fileop = SHFILEOPSTRUCTW()
fileop.hwnd = 0
fileop.wFunc = FO_DELETE
fileop.pFrom = LPCWSTR(path + '\0')
# FIX: https://github.com/hsoft/send2trash/issues/17
# Starting in python 3.6.3 it is no longer possible to use:
# LPCWSTR(path + '\0') directly as embedded null characters are no longer
# allowed in strings
# Workaround
# - create buffer of c_wchar[] (LPCWSTR is based on this type)
# - buffer is two c_wchar characters longer (double null terminator)
# - cast the address of the buffer to a LPCWSTR
# NOTE: based on how python allocates memory for these types they should
# always be zero, if this is ever not true we can go back to explicitly
# setting the last two characters to null using buffer[index] = '\0'.
buffer = create_unicode_buffer(path, len(path)+2)
fileop.pFrom = LPCWSTR(addressof(buffer))
fileop.pTo = None
fileop.fFlags = FOF_ALLOWUNDO | FOF_NOCONFIRMATION | FOF_NOERRORUI | FOF_SILENT
fileop.fAnyOperationsAborted = 0