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#
# Copyright (C) 2019 Bloomberg L.P.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/>.
#
# Authors:
# Benjamin Schubert <bschubert@bloomberg.net>
#
# Check if given filename containers valid characters.
#
# Args:
# name (str): Name of the file
#
# Returns:
# (bool): True if all characters are valid, False otherwise.
#
def valid_chars_name(str name):
cdef int char_value
cdef int forbidden_char
for char_value in name:
# 0-31 are control chars, 127 is DEL, and >127 means non-ASCII
if char_value <= 31 or char_value >= 127:
return False
# Disallow characters that are invalid on Windows. The list can be
# found at https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file
#
# Note that although : (colon) is not allowed, we do not raise
# warnings because of that, since we use it as a separator for
# junctioned elements.
#
# We also do not raise warnings on slashes since they are used as
# path separators.
for forbidden_char in '<>"|?*':
if char_value == forbidden_char:
return False
return True
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