Test if a string is a valid file name (Views: 2141)
Problem/Question/Abstract: Test if a string is a valid file name Answer: The following code tests a given string for forbidden characters. The forbidden characters are dependent on whether it is a 8.3 (short) or a long file name. const { for short 8.3 file names } ShortForbiddenChars: set of Char = [';', '=', '+', '<', '>', '|', '"', '[', ']', '\', '''']; { for long file names } LongForbiddenChars: set of Char = ['<', '>', '|', '"', '\']; function TestFilename(Filename: string; islong: Boolean): Boolean; var I: integer; begin Result := Filename <> ''; if islong then begin for I := 1 to Length(Filename) do Result := Result and not (Filename[I] in LongForbiddenChars); end else begin for I := 1 to Length(Filename) do Result := Result and not (Filename[I] in ShortForbiddenChars); end; end; |