3 ;;; Additional stream protocol.
5 ;;; (c) 2009 Straylight/Edgeware
8 ;;;----- Licensing notice ---------------------------------------------------
10 ;;; This file is part of the Sensble Object Design, an object system for C.
12 ;;; SOD is free software; you can redistribute it and/or modify
13 ;;; it under the terms of the GNU General Public License as published by
14 ;;; the Free Software Foundation; either version 2 of the License, or
15 ;;; (at your option) any later version.
17 ;;; SOD is distributed in the hope that it will be useful,
18 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;;; GNU General Public License for more details.
22 ;;; You should have received a copy of the GNU General Public License
23 ;;; along with SOD; if not, write to the Free Software Foundation,
24 ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 (cl:in-package #:sod-parser)
28 ;;;--------------------------------------------------------------------------
29 ;;; Discovery of file names.
31 (export 'stream-pathname)
32 (defgeneric stream-pathname (stream)
34 "Returns the pathname of the file that STREAM is open on.
36 If STREAM is open on a file, then return the pathname of that file.
37 Otherwise return nil.")
39 ;; Provide some default methods. Most streams don't have a pathname.
40 ;; File-based streams provide a pathname, but it's usually been merged with
41 ;; `*default-pathname-defaults*' or some such, which has made it absolute,
42 ;; which isn't ideal. We'll hack around this in more useful classes later.
43 (:method ((stream stream)) nil)
44 (:method ((stream file-stream)) (pathname stream)))
46 ;;;----- That's all, folks --------------------------------------------------