| 1 | ;;; -*-lisp-*- |
| 2 | ;;; |
| 3 | ;;; Additional stream protocol. |
| 4 | ;;; |
| 5 | ;;; (c) 2009 Straylight/Edgeware |
| 6 | ;;; |
| 7 | |
| 8 | ;;;----- Licensing notice --------------------------------------------------- |
| 9 | ;;; |
| 10 | ;;; This file is part of the Sensble Object Design, an object system for C. |
| 11 | ;;; |
| 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. |
| 16 | ;;; |
| 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. |
| 21 | ;;; |
| 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. |
| 25 | |
| 26 | (cl:in-package #:sod-parser) |
| 27 | |
| 28 | ;;;-------------------------------------------------------------------------- |
| 29 | ;;; Discovery of file names. |
| 30 | |
| 31 | (export 'stream-pathname) |
| 32 | (defgeneric stream-pathname (stream) |
| 33 | (:documentation |
| 34 | "Returns the pathname of the file that STREAM is open on. |
| 35 | |
| 36 | If STREAM is open on a file, then return the pathname of that file. |
| 37 | Otherwise return nil.") |
| 38 | |
| 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))) |
| 45 | |
| 46 | ;;;----- That's all, folks -------------------------------------------------- |