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ntdir.scm
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1999-01-02
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#| -*-Scheme-*-
$Id: ntdir.scm,v 1.2 1999/01/02 06:11:34 cph Exp $
Copyright (c) 1997, 1999 Massachusetts Institute of Technology
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|#
;;;; Directory Operations -- OS/2
;;; package: (runtime directory)
(declare (usual-integrations))
(define *expand-directory-prefixes?* #t)
(define (directory-read pattern #!optional sort? full?)
(let ((sort? (if (default-object? sort?) #t sort?))
(full? (if (default-object? full?) #f full?)))
(let ((entries
(if full?
(directory-read-full pattern)
(directory-read-nosort pattern))))
(if (not sort?)
entries
(sort entries
(if full?
(lambda (x y) (pathname<? (car x) (car y)))
pathname<?))))))
(define (pathname<? x y)
(string-ci<? (file-namestring x) (file-namestring y)))
(define (directory-read-nosort pattern)
(let ((pattern (merge-pathnames pattern)))
(map (let ((directory-path (directory-pathname pattern)))
(lambda (pathname)
(merge-pathnames pathname directory-path)))
(let ((fnames (generate-directory-pathnames pattern)))
(fluid-let ((*expand-directory-prefixes?* #f))
(map ->pathname fnames))))))
(define (generate-directory-pathnames pathname)
(let ((channel (directory-channel-open (->namestring pathname))))
(let loop ((result '()))
(let ((name (directory-channel-read channel)))
(if name
(loop (cons name result))
(begin
(directory-channel-close channel)
result))))))
(define (directory-read-full pattern)
(let ((pattern (merge-pathnames pattern)))
(map (let ((directory-path (directory-pathname pattern)))
(lambda (entry)
(cons (merge-pathnames (car entry) directory-path)
(cdr entry))))
(let ((entries (generate-directory-entries pattern)))
(fluid-let ((*expand-directory-prefixes?* #f))
(map (lambda (entry) (cons (->pathname (car entry)) (cdr entry)))
entries))))))
(define (generate-directory-entries pathname)
(let ((channel (directory-channel-open (->namestring pathname))))
(let loop ((result '()))
(let ((entry (directory-channel-read-entry channel)))
(if entry
(loop (cons entry result))
(begin
(directory-channel-close channel)
result))))))
(define (directory-channel-read-entry channel)
((ucode-primitive win32-directory-read 1)
(directory-channel/descriptor channel)))