If any of the characters in @illegal_characters or the character zero appears
as an escaped character in @escaped_string then that is an error and %NULL
will be returned. This is useful it you want to avoid for instance having a
slash being expanded in an escaped path element, which might confuse pathname
handling.
Unescapes a whole escaped string.
If any of the characters in @illegal_characters or the character zero appears as an escaped character in @escaped_string then that is an error and %NULL will be returned. This is useful it you want to avoid for instance having a slash being expanded in an escaped path element, which might confuse pathname handling.