source: trunk/j/src/org/armedbear/lisp/enough-namestring.lisp @ 11288

Last change on this file since 11288 was 11288, checked in by ehuelsmann, 13 years ago

Set svn:eol-style property on (most) Java and all lisp files.

  • Property svn:eol-style set to native
File size: 2.4 KB
Line 
1;;; enough-namestring.lisp
2;;;
3;;; Copyright (C) 2004-2005 Peter Graves
4;;; $Id: enough-namestring.lisp,v 1.6 2005-10-14 16:17:48 piso Exp $
5;;;
6;;; This program is free software; you can redistribute it and/or
7;;; modify it under the terms of the GNU General Public License
8;;; as published by the Free Software Foundation; either version 2
9;;; of the License, or (at your option) any later version.
10;;;
11;;; This program is distributed in the hope that it will be useful,
12;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14;;; GNU General Public License for more details.
15;;;
16;;; You should have received a copy of the GNU General Public License
17;;; along with this program; if not, write to the Free Software
18;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19
20;;; Adapted from SBCL.
21
22(in-package #:system)
23
24(declaim (inline equal-components-p))
25(defun equal-components-p (component1 component2)
26  #+win32 (equalp component1 component2)
27  #-win32 (equal component1 component2))
28
29(defun enough-namestring (pathname
30                          &optional
31                          (defaults *default-pathname-defaults*))
32  (unless (equal (pathname-host pathname) (pathname-host defaults))
33    (return-from enough-namestring (namestring pathname)))
34  (let ((pathname-directory (pathname-directory pathname)))
35    (if pathname-directory
36        (let* ((defaults-directory (pathname-directory defaults))
37               (prefix-len (length defaults-directory))
38               (result-directory
39                (cond ((and (>= prefix-len 1)
40                            (>= (length pathname-directory) prefix-len)
41                            (equal-components-p (subseq pathname-directory 0 prefix-len)
42                                                defaults-directory))
43                       (cons :relative (nthcdr prefix-len pathname-directory)))
44                      ((eq (car pathname-directory) :absolute)
45                       pathname-directory)
46                      (t
47                       (return-from enough-namestring (namestring pathname))))))
48          (if (equal result-directory '(:relative))
49              (file-namestring pathname)
50              (concatenate 'simple-string
51                           (directory-namestring (make-pathname :directory result-directory))
52                           (file-namestring pathname))))
53        (file-namestring pathname))))
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