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Revision 1.20 - (hide annotations)
Wed Aug 4 09:39:25 1993 UTC (20 years, 8 months ago) by ram
Branch: MAIN
Changes since 1.19: +4 -2 lines
Make %ENUMERATE-SEARCH-LIST call TRANSLATE-LOGICAL-PATHNAME.
1 wlott 1.1 ;;; -*- Package: LISP -*-
2     ;;; **********************************************************************
3     ;;; This code was written as part of the CMU Common Lisp project at
4     ;;; Carnegie Mellon University, and has been placed in the public domain.
5     ;;; If you want to use this code or any part of CMU Common Lisp, please contact
6     ;;; Scott Fahlman or slisp-group@cs.cmu.edu.
7     ;;;
8     (ext:file-comment
9 ram 1.20 "$Header: /tiger/var/lib/cvsroots/cmucl/src/code/pathname.lisp,v 1.20 1993/08/04 09:39:25 ram Exp $")
10 wlott 1.1 ;;;
11     ;;; **********************************************************************
12     ;;;
13     ;;; Machine/filesystem independent pathname functions for CMU Common Lisp.
14     ;;;
15 ram 1.17 ;;; Written by William Lott, Paul Gleichauf and Rob MacLachlan.
16 wlott 1.1 ;;; Earlier version written by Jim Large and Rob MacLachlan
17     ;;;
18     ;;; **********************************************************************
19    
20     (in-package "LISP")
21    
22     (export '(pathname pathnamep logical-pathname logical-pathname-p
23     parse-namestring merge-pathnames make-pathname
24     pathname-host pathname-device pathname-directory pathname-name
25     pathname-type pathname-version namestring file-namestring
26     directory-namestring host-namestring enough-namestring
27     wild-pathname-p pathname-match-p translate-pathname
28     translate-logical-pathname logical-pathname-translations
29     load-logical-pathname-translations *default-pathname-defaults*))
30    
31     (in-package "EXTENSIONS")
32 wlott 1.9 (export '(search-list search-list-defined-p clear-search-list
33     enumerate-search-list))
34 wlott 1.1
35     (in-package "LISP")
36    
37    
38 phg 1.16 ;;;; HOST structures
39 wlott 1.1
40 phg 1.16 ;;; The host structure holds the functions that both parse the pathname
41     ;;; information into sturcture slot entries, and after translation the inverse
42     ;;; (unparse) functions.
43     ;;;
44     (defstruct (host
45     (:print-function %print-host))
46     (parse (required-argument) :type function)
47     (unparse (required-argument) :type function)
48     (unparse-host (required-argument) :type function)
49     (unparse-directory (required-argument) :type function)
50     (unparse-file (required-argument) :type function)
51     (unparse-enough (required-argument) :type function)
52     (customary-case (required-argument) :type (member :upper :lower)))
53 phg 1.13
54 phg 1.16 ;;; %PRINT-HOST -- Internal
55     ;;;
56     (defun %print-host (host stream depth)
57     (declare (ignore depth))
58     (print-unreadable-object (host stream :type t :identity t)))
59    
60     (defstruct (logical-host
61     (:include host
62     (:parse #'parse-logical-namestring)
63     (:unparse #'unparse-logical-namestring)
64 ram 1.17 (:unparse-host
65     #'(lambda (x) (logical-host-name (%pathname-host x))))
66 phg 1.16 (:unparse-directory #'unparse-logical-directory)
67 ram 1.17 (:unparse-file #'unparse-unix-file)
68 phg 1.16 (:unparse-enough #'identity)
69     (:customary-case :upper)))
70     (name "" :type simple-base-string)
71     (translations nil :type list)
72     (canon-transls nil :type list))
73    
74 ram 1.17 ;;; The various magic tokens that are allowed to appear in pretty much all
75     ;;; pathname components.
76     ;;;
77     (deftype component-tokens ()
78     '(member nil :unspecific :wild))
79    
80 phg 1.16 ;;;; Pathname structures
81    
82 wlott 1.1 (defstruct (pathname
83     (:conc-name %pathname-)
84     (:print-function %print-pathname)
85     (:constructor
86     %make-pathname (host device directory name type version))
87     (:predicate pathnamep)
88     (:make-load-form-fun :just-dump-it-normally))
89 phg 1.13 ;; Slot holds the host, at present either a UNIX or logical host.
90 wlott 1.1 (host nil :type (or host null))
91 phg 1.13 ;; Device is the name of a logical or physical device holding files.
92 ram 1.17 (device nil :type component-tokens)
93 phg 1.13 ;; A list of strings that are the component subdirectory components.
94 wlott 1.1 (directory nil :type list)
95 phg 1.13 ;; The filename.
96 ram 1.17 (name nil :type (or simple-string pattern component-tokens))
97 phg 1.13 ;; The type extension of the file.
98 ram 1.17 (type nil :type (or simple-string pattern component-tokens))
99 phg 1.13 ;; The version number of the file, a positive integer, but not supported
100     ;; on standard UNIX filesystems.
101 ram 1.17 (version nil :type (or integer component-tokens (member :newest))))
102 wlott 1.1
103 phg 1.13 ;;; %PRINT-PATHNAME -- Internal
104     ;;;
105     ;;; The printed representation of the pathname structure.
106     ;;;
107 wlott 1.1 (defun %print-pathname (pathname stream depth)
108     (declare (ignore depth))
109     (let ((namestring (handler-case (namestring pathname)
110     (error nil))))
111     (cond (namestring
112     (format stream "#p~S" namestring))
113     (*print-readably*
114     (error "~S Cannot be printed readably." pathname))
115     (t
116     (funcall (formatter "#<Unprintable pathname, Host=~S, Device=~S, ~
117     Directory=~S, File=~S, Name=~S, Version=~S>")
118     stream
119     (%pathname-host pathname)
120     (%pathname-device pathname)
121     (%pathname-directory pathname)
122     (%pathname-name pathname)
123     (%pathname-type pathname)
124     (%pathname-version pathname))))))
125    
126 phg 1.16 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
127 phg 1.13 ;;;
128 phg 1.16 ;;; Logical pathnames have the following format:
129     ;;;
130     ;;; logical-namestring ::=
131     ;;; [host ":"] [";"] {directory ";"}* [name] ["." type ["." version]]
132     ;;;
133     ;;; host ::= word
134     ;;; directory ::= word | wildcard-word | **
135     ;;; name ::= word | wildcard-word
136     ;;; type ::= word | wildcard-word
137     ;;; version ::= pos-int | newest | NEWEST | *
138     ;;; word ::= {uppercase-letter | digit | -}+
139     ;;; wildcard-word ::= [word] '* {word '*}* [word]
140     ;;; pos-int ::= integer > 0
141     ;;;
142     ;;; Physical pathnames include all these slots and a device slot.
143     ;;;
144     ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
145 wlott 1.1
146 phg 1.16 ;; Logical pathnames are a subclass of pathname, their class relations are
147     ;; mimiced using structures for efficency.
148    
149     (defstruct (logical-pathname
150     (:conc-name %logical-pathname-)
151     (:print-function %print-logical-pathname)
152     (:include pathname)
153 ram 1.17 (:constructor %make-logical-pathname
154     (host device directory name type version))
155 phg 1.16 (:make-load-form-fun :just-dump-it-normally)))
156 ram 1.19
157     (declaim (freeze-type logical-pathname logical-host))
158 phg 1.16
159     ;;; %PRINT-LOGICAL-PATHNAME -- Internal
160 phg 1.13 ;;;
161 phg 1.16 ;;; The printed representation of the logical-pathname structure.
162     ;;; The potential conflict with search-lists requires isolating the printed
163     ;;; representation to use the i/o macro #.(logical-pathname <path-designator>).
164     ;;;
165     (defun %print-logical-pathname (pathname stream depth)
166 wlott 1.1 (declare (ignore depth))
167 phg 1.16 (let ((namestring (handler-case (namestring pathname)
168     (error nil))))
169     (cond (namestring
170     (format stream "#.(logical-pathname ~S)" namestring))
171     (*print-readably*
172     (error "~S Cannot be printed readably." pathname))
173     (t
174     (funcall (formatter "#<Unprintable pathname, Host=~S, ~
175     Directory=~S, File=~S, Name=~S, Version=~S>")
176     stream
177     (%pathname-host pathname)
178     (%pathname-directory pathname)
179     (%pathname-name pathname)
180     (%pathname-type pathname)
181     (%pathname-version pathname))))))
182 wlott 1.1
183 phg 1.16 ;;; *LOGICAL-HOSTS* --internal.
184     ;;;
185     ;;; Hash table searching maps a logical-pathname's host to their physical
186     ;;; pathname translation.
187    
188     (defvar *logical-hosts* (make-hash-table :test #'equal))
189    
190 ram 1.17 ;;; PATH-DESIGNATOR -- internal type
191 phg 1.16 ;;;
192     (deftype path-designator ()
193     "A path specification, either a string, stream or pathname."
194 ram 1.17 '(or string stream pathname))
195 phg 1.16
196 wlott 1.1
197     ;;;; Patterns
198    
199 phg 1.13 ;;; Patterns are a list of entries and wildcards used for pattern matches
200     ;;; of translations.
201    
202 wlott 1.1 (defstruct (pattern
203     (:print-function %print-pattern)
204     (:make-load-form-fun :just-dump-it-normally)
205     (:constructor make-pattern (pieces)))
206     (pieces nil :type list))
207    
208 phg 1.13 ;;; %PRINT-PATTERN -- Internal
209     ;;;
210 wlott 1.1 (defun %print-pattern (pattern stream depth)
211     (declare (ignore depth))
212     (print-unreadable-object (pattern stream :type t)
213     (if *print-pretty*
214     (let ((*print-escape* t))
215     (pprint-fill stream (pattern-pieces pattern) nil))
216     (prin1 (pattern-pieces pattern) stream))))
217    
218 phg 1.13 ;;; PATTERN= -- Internal
219     ;;;
220 wlott 1.1 (defun pattern= (pattern1 pattern2)
221     (declare (type pattern pattern1 pattern2))
222     (let ((pieces1 (pattern-pieces pattern1))
223     (pieces2 (pattern-pieces pattern2)))
224     (and (= (length pieces1) (length pieces2))
225     (every #'(lambda (piece1 piece2)
226     (typecase piece1
227     (simple-string
228     (and (simple-string-p piece2)
229     (string= piece1 piece2)))
230     (cons
231     (and (consp piece2)
232     (eq (car piece1) (car piece2))
233     (string= (cdr piece1) (cdr piece2))))
234     (t
235     (eq piece1 piece2))))
236     pieces1
237     pieces2))))
238    
239 phg 1.13 ;;; PATTERN-MATCHES -- Internal
240     ;;;
241 phg 1.16 ;;; If the string matches the pattern returns the multiple valuse T and a
242     ;;; list of the matched strings.
243     ;;;
244 phg 1.13 (defun pattern-matches (pattern string)
245     (declare (type pattern pattern)
246     (type simple-string string))
247     (let ((len (length string)))
248     (labels ((maybe-prepend (subs cur-sub chars)
249     (if cur-sub
250     (let* ((len (length chars))
251     (new (make-string len))
252     (index len))
253     (dolist (char chars)
254     (setf (schar new (decf index)) char))
255     (cons new subs))
256     subs))
257     (matches (pieces start subs cur-sub chars)
258     (if (null pieces)
259     (if (= start len)
260     (values t (maybe-prepend subs cur-sub chars))
261     (values nil nil))
262     (let ((piece (car pieces)))
263     (etypecase piece
264     (simple-string
265     (let ((end (+ start (length piece))))
266     (and (<= end len)
267     (string= piece string
268     :start2 start :end2 end)
269     (matches (cdr pieces) end
270     (maybe-prepend subs cur-sub chars)
271     nil nil))))
272     (list
273     (ecase (car piece)
274     (:character-set
275     (and (< start len)
276     (let ((char (schar string start)))
277     (if (find char (cdr piece) :test #'char=)
278     (matches (cdr pieces) (1+ start) subs t
279     (cons char chars))))))))
280     ((member :single-char-wild)
281     (and (< start len)
282     (matches (cdr pieces) (1+ start) subs t
283     (cons (schar string start) chars))))
284 ram 1.17 ((member :multi-char-wild)
285 phg 1.13 (multiple-value-bind
286     (won new-subs)
287     (matches (cdr pieces) start subs t chars)
288     (if won
289     (values t new-subs)
290     (and (< start len)
291     (matches pieces (1+ start) subs t
292     (cons (schar string start)
293     chars)))))))))))
294     (multiple-value-bind
295     (won subs)
296     (matches (pattern-pieces pattern) 0 nil nil nil)
297     (values won (reverse subs))))))
298 wlott 1.1
299 phg 1.16
300 ram 1.17 ;;; DIRECTORY-COMPONENTS-MATCH -- Internal
301 phg 1.16 ;;;
302 ram 1.17 ;;; Pathname-match-p for directory components.
303 phg 1.16 ;;;
304 ram 1.17 (defun directory-components-match (thing wild)
305     (or (eq thing wild)
306     (eq wild :wild)
307     (and (consp wild)
308     (let ((wild1 (first wild)))
309     (if (eq wild1 :wild-inferiors)
310     (let ((wild-subdirs (rest wild)))
311     (or (null wild-subdirs)
312     (loop
313     (when (directory-components-match thing wild-subdirs)
314     (return t))
315     (pop thing)
316     (unless thing (return nil)))))
317     (and (consp thing)
318     (components-match (first thing) wild1)
319     (directory-components-match (rest thing)
320     (rest wild))))))))
321 phg 1.16
322    
323 phg 1.13 ;;; COMPONENTS-MATCH -- Internal
324     ;;;
325 ram 1.17 ;;; Return true if pathname component Thing is matched by Wild. Not
326     ;;; commutative.
327 phg 1.13 ;;;
328 ram 1.17 (defun components-match (thing wild)
329     (declare (type (or pattern symbol simple-string integer) thing wild))
330     (or (eq thing wild)
331     (eq wild :wild)
332     (typecase thing
333 phg 1.13 (simple-base-string
334 ram 1.17 ;; String is matched by itself, a matching pattern or :WILD.
335     (typecase wild
336 phg 1.16 (pattern
337 ram 1.17 (values (pattern-matches wild thing)))
338 phg 1.13 (simple-base-string
339 ram 1.17 (string= thing wild))))
340 phg 1.13 (pattern
341 ram 1.17 ;; A pattern is only matched by an identical pattern.
342     (and (pattern-p wild) (pattern= thing wild)))
343     (integer
344     ;; an integer (version number) is matched by :WILD or the same
345     ;; integer. This branch will actually always be NIL as long is the
346     ;; version is a fixnum.
347     (eql thing wild)))))
348 phg 1.13
349 ram 1.17
350 phg 1.13 ;;; COMPARE-COMPONENT -- Internal
351     ;;;
352     ;;; A predicate for comparing two pathname slot component sub-entries.
353     ;;;
354 wlott 1.1 (defun compare-component (this that)
355     (or (eql this that)
356     (typecase this
357     (simple-string
358     (and (simple-string-p that)
359     (string= this that)))
360     (pattern
361     (and (pattern-p that)
362     (pattern= this that)))
363     (cons
364     (and (consp that)
365     (compare-component (car this) (car that))
366     (compare-component (cdr this) (cdr that)))))))
367    
368    
369 phg 1.13 ;;;; Pathname functions.
370 wlott 1.1
371 phg 1.13 ;;; Implementation determined defaults to pathname slots.
372 wlott 1.1
373     (defvar *default-pathname-defaults*)
374    
375 phg 1.13 ;;; PATHNAME= -- Internal
376     ;;;
377 wlott 1.1 (defun pathname= (pathname1 pathname2)
378 phg 1.16 (declare (type pathname pathname1)
379     (type pathname pathname2))
380 wlott 1.1 (and (eq (%pathname-host pathname1)
381     (%pathname-host pathname2))
382     (compare-component (%pathname-device pathname1)
383     (%pathname-device pathname2))
384     (compare-component (%pathname-directory pathname1)
385     (%pathname-directory pathname2))
386     (compare-component (%pathname-name pathname1)
387     (%pathname-name pathname2))
388     (compare-component (%pathname-type pathname1)
389     (%pathname-type pathname2))
390     (compare-component (%pathname-version pathname1)
391     (%pathname-version pathname2))))
392    
393 phg 1.13 ;;; WITH-PATHNAME -- Internal
394 phg 1.16 ;;; Converts the expr, a pathname designator (a pathname, or string, or
395 phg 1.13 ;;; stream), into a pathname.
396     ;;;
397 wlott 1.1 (defmacro with-pathname ((var expr) &body body)
398     `(let ((,var (let ((,var ,expr))
399     (etypecase ,var
400     (pathname ,var)
401     (string (parse-namestring ,var))
402 ram 1.5 (stream (parse-namestring (file-name ,var)))))))
403 wlott 1.1 ,@body))
404    
405 phg 1.16 ;;; WITH-HOST -- Internal
406     ;;;
407     ;;; Converts the var, a host or string name for a host, into a logical-host
408     ;;; structure or nil if not defined.
409     ;;;
410     (defmacro with-host ((var expr) &body body)
411     `(let ((,var (let ((,var ,expr))
412     (typecase ,var
413     (logical-host ,var)
414 ram 1.17 (string (find-host ,var))
415 phg 1.16 (t nil)))))
416     ,@body))
417 wlott 1.1
418 phg 1.13 ;;; PATHNAME -- Interface
419     ;;;
420 wlott 1.1 (defun pathname (thing)
421 phg 1.13 "Convert thing (a pathname, string or stream) into a pathname."
422 phg 1.16 (declare (type path-designator thing))
423 wlott 1.1 (with-pathname (pathname thing)
424     pathname))
425    
426 phg 1.13 ;;; MAYBE-DIDDLE-CASE -- Internal
427     ;;;
428     ;;; Change the case of thing if diddle-p T.
429     ;;;
430 wlott 1.1 (defun maybe-diddle-case (thing diddle-p)
431 ram 1.17 (if (and diddle-p (not (or (symbolp thing) (integerp thing))))
432 wlott 1.1 (labels ((check-for (pred in)
433 ram 1.17 (typecase in
434 wlott 1.1 (pattern
435     (dolist (piece (pattern-pieces in))
436     (when (typecase piece
437     (simple-string
438     (check-for pred piece))
439     (cons
440     (case (car in)
441     (:character-set
442     (check-for pred (cdr in))))))
443     (return t))))
444     (list
445     (dolist (x in)
446     (when (check-for pred x)
447     (return t))))
448     (simple-base-string
449     (dotimes (i (length in))
450     (when (funcall pred (schar in i))
451     (return t))))
452 ram 1.17 (t nil)))
453 wlott 1.1 (diddle-with (fun thing)
454 ram 1.17 (typecase thing
455 wlott 1.1 (pattern
456     (make-pattern
457     (mapcar #'(lambda (piece)
458     (typecase piece
459     (simple-base-string
460     (funcall fun thing))
461     (cons
462     (case (car piece)
463     (:character-set
464     (cons :character-set
465     (funcall fun (cdr piece))))
466     (t
467     piece)))
468     (t
469     piece)))
470     (pattern-pieces thing))))
471     (list
472     (mapcar fun thing))
473 phg 1.12 (simple-base-string
474     (funcall fun thing))
475 ram 1.17 (t
476 phg 1.12 thing))))
477 wlott 1.1 (let ((any-uppers (check-for #'upper-case-p thing))
478     (any-lowers (check-for #'lower-case-p thing)))
479     (cond ((and any-uppers any-lowers)
480     ;; Mixed case, stays the same.
481     thing)
482 phg 1.12 (any-uppers
483     ;; All uppercase, becomes all lower case.
484     (diddle-with #'(lambda (x) (if (stringp x)
485     (string-downcase x)
486     x)) thing))
487     (any-lowers
488     ;; All lowercase, becomes all upper case.
489     (diddle-with #'(lambda (x) (if (stringp x)
490     (string-upcase x)
491     x)) thing))
492     (t
493     ;; No letters? I guess just leave it.
494     thing))))
495 wlott 1.1 thing))
496    
497 ram 1.17
498 phg 1.13 ;;; MERGE-DIRECTORIES -- Internal
499     ;;;
500 wlott 1.1 (defun merge-directories (dir1 dir2 diddle-case)
501 wlott 1.6 (if (or (eq (car dir1) :absolute)
502     (null dir2))
503 wlott 1.1 dir1
504     (let ((results nil))
505     (flet ((add (dir)
506     (if (and (eq dir :back)
507     results
508     (not (eq (car results) :back)))
509     (pop results)
510     (push dir results))))
511     (dolist (dir (maybe-diddle-case dir2 diddle-case))
512     (add dir))
513     (dolist (dir (cdr dir1))
514     (add dir)))
515     (reverse results))))
516    
517 phg 1.13 ;;; MERGE-PATHNAMES -- Interface
518     ;;;
519 wlott 1.1 (defun merge-pathnames (pathname
520     &optional
521     (defaults *default-pathname-defaults*)
522     (default-version :newest))
523 phg 1.13 "Construct a filled in pathname by completing the unspecified components
524     from the defaults."
525 phg 1.16 (declare (type path-designator pathname)
526     (type path-designator defaults)
527     (values pathname))
528 wlott 1.1 (with-pathname (defaults defaults)
529 wlott 1.2 (let ((pathname (let ((*default-pathname-defaults* defaults))
530     (pathname pathname))))
531 wlott 1.1 (let* ((default-host (%pathname-host defaults))
532     (pathname-host (%pathname-host pathname))
533     (diddle-case
534     (and default-host pathname-host
535     (not (eq (host-customary-case default-host)
536     (host-customary-case pathname-host))))))
537     (%make-pathname (or pathname-host default-host)
538     (or (%pathname-device pathname)
539     (maybe-diddle-case (%pathname-device defaults)
540     diddle-case))
541     (merge-directories (%pathname-directory pathname)
542     (%pathname-directory defaults)
543     diddle-case)
544     (or (%pathname-name pathname)
545     (maybe-diddle-case (%pathname-name defaults)
546     diddle-case))
547     (or (%pathname-type pathname)
548     (maybe-diddle-case (%pathname-type defaults)
549     diddle-case))
550     (or (%pathname-version pathname)
551     default-version))))))
552    
553 phg 1.13 ;;; IMPORT-DIRECTORY -- Internal
554     ;;;
555 wlott 1.1 (defun import-directory (directory diddle-case)
556     (etypecase directory
557     (null nil)
558 ram 1.17 ((member :wild) '(:absolute :wild-inferiors))
559     ((member :unspecific) '(:relative))
560 wlott 1.1 (list
561     (collect ((results))
562     (ecase (pop directory)
563     (:absolute
564     (results :absolute)
565     (when (search-list-p (car directory))
566     (results (pop directory))))
567     (:relative
568     (results :relative)))
569     (dolist (piece directory)
570 ram 1.17 (cond ((member piece '(:wild :wild-inferiors :up :back))
571 phg 1.12 (results piece))
572 wlott 1.1 ((or (simple-string-p piece) (pattern-p piece))
573     (results (maybe-diddle-case piece diddle-case)))
574     ((stringp piece)
575     (results (maybe-diddle-case (coerce piece 'simple-string)
576     diddle-case)))
577     (t
578     (error "~S is not allowed as a directory component." piece))))
579     (results)))
580     (simple-string
581     `(:absolute
582     ,(maybe-diddle-case directory diddle-case)))
583     (string
584     `(:absolute
585     ,(maybe-diddle-case (coerce directory 'simple-string)
586     diddle-case)))))
587    
588 phg 1.13 ;;; MAKE-PATHNAME -- Interface
589     ;;;
590 phg 1.16 (defun make-pathname (&key host
591 ram 1.11 (device nil devp)
592     (directory nil dirp)
593     (name nil namep)
594     (type nil typep)
595     (version nil versionp)
596 phg 1.16 defaults
597     (case :local))
598 phg 1.13 "Makes a new pathname from the component arguments. Note that host is a host-
599     structure."
600 ram 1.17 (declare (type (or host component-tokens) host)
601     (type component-tokens device)
602     (type (or list string pattern component-tokens) directory)
603     (type (or string pattern component-tokens) name type)
604     (type (or integer component-tokens (member :newest)) version)
605 phg 1.16 (type (or path-designator null) defaults)
606 wlott 1.1 (type (member :common :local) case))
607 phg 1.16 (let* ((defaults (when defaults
608     (with-pathname (defaults defaults) defaults)))
609 wlott 1.1 (default-host (if defaults
610     (%pathname-host defaults)
611     (pathname-host *default-pathname-defaults*)))
612 phg 1.16 (host (or host default-host))
613 ram 1.18 (diddle-args (and (eq (host-customary-case host) :lower)
614     (eq case :common)))
615 wlott 1.1 (diddle-defaults
616     (not (eq (host-customary-case host)
617 phg 1.16 (host-customary-case default-host))))
618     (dev (if devp device (if defaults (%pathname-device defaults))))
619     (dir (import-directory directory diddle-args))
620     (ver (cond
621     (versionp version)
622     (defaults (%pathname-version defaults))
623     (t nil))))
624     (when (and defaults (not dirp))
625     (setf dir
626     (merge-directories dir
627     (%pathname-directory defaults)
628     diddle-defaults)))
629    
630 ram 1.11 (macrolet ((pick (var varp field)
631 ram 1.17 `(cond ((or (simple-string-p ,var)
632 wlott 1.1 (pattern-p ,var))
633     (maybe-diddle-case ,var diddle-args))
634     ((stringp ,var)
635     (maybe-diddle-case (coerce ,var 'simple-string)
636     diddle-args))
637 ram 1.11 (,varp
638 wlott 1.1 (maybe-diddle-case ,var diddle-args))
639     (defaults
640     (maybe-diddle-case (,field defaults)
641     diddle-defaults))
642     (t
643     nil))))
644 phg 1.16 (if (logical-host-p host)
645     (%make-logical-pathname
646     host
647 ram 1.17 :unspecific
648 phg 1.16 dir
649     (pick name namep %pathname-name)
650     (pick type typep %pathname-type)
651     ver)
652     (%make-pathname
653     host
654     dev
655     dir
656     (pick name namep %pathname-name)
657     (pick type typep %pathname-type)
658     ver)))))
659 wlott 1.1
660 phg 1.13 ;;; PATHNAME-HOST -- Interface
661     ;;;
662 wlott 1.1 (defun pathname-host (pathname &key (case :local))
663 phg 1.13 "Accessor for the pathname's host."
664 phg 1.16 (declare (type path-designator pathname)
665 wlott 1.1 (type (member :local :common) case)
666 phg 1.16 (values host)
667 wlott 1.1 (ignore case))
668     (with-pathname (pathname pathname)
669     (%pathname-host pathname)))
670    
671 phg 1.13 ;;; PATHNAME-DEVICE -- Interface
672     ;;;
673 wlott 1.1 (defun pathname-device (pathname &key (case :local))
674 phg 1.13 "Accessor for pathname's device."
675 phg 1.16 (declare (type path-designator pathname)
676 wlott 1.1 (type (member :local :common) case))
677     (with-pathname (pathname pathname)
678     (maybe-diddle-case (%pathname-device pathname)
679     (and (eq case :common)
680     (eq (host-customary-case
681     (%pathname-host pathname))
682     :lower)))))
683    
684 phg 1.13 ;;; PATHNAME-DIRECTORY -- Interface
685     ;;;
686 wlott 1.1 (defun pathname-directory (pathname &key (case :local))
687 phg 1.13 "Accessor for the pathname's directory list."
688 phg 1.16 (declare (type path-designator pathname)
689 wlott 1.1 (type (member :local :common) case))
690     (with-pathname (pathname pathname)
691     (maybe-diddle-case (%pathname-directory pathname)
692     (and (eq case :common)
693     (eq (host-customary-case
694     (%pathname-host pathname))
695     :lower)))))
696 phg 1.13 ;;; PATHNAME-NAME -- Interface
697     ;;;
698 wlott 1.1 (defun pathname-name (pathname &key (case :local))
699 phg 1.13 "Accessor for the pathname's name."
700 phg 1.16 (declare (type path-designator pathname)
701 wlott 1.1 (type (member :local :common) case))
702     (with-pathname (pathname pathname)
703     (maybe-diddle-case (%pathname-name pathname)
704     (and (eq case :common)
705     (eq (host-customary-case
706     (%pathname-host pathname))
707     :lower)))))
708    
709 phg 1.13 ;;; PATHNAME-TYPE
710     ;;;
711 wlott 1.1 (defun pathname-type (pathname &key (case :local))
712 phg 1.13 "Accessor for the pathname's name."
713 phg 1.16 (declare (type path-designator pathname)
714 wlott 1.1 (type (member :local :common) case))
715     (with-pathname (pathname pathname)
716     (maybe-diddle-case (%pathname-type pathname)
717     (and (eq case :common)
718     (eq (host-customary-case
719     (%pathname-host pathname))
720     :lower)))))
721 phg 1.16
722 phg 1.13 ;;; PATHNAME-VERSION
723     ;;;
724 wlott 1.1 (defun pathname-version (pathname)
725 phg 1.13 "Accessor for the pathname's version."
726 phg 1.16 (declare (type path-designator pathname))
727 wlott 1.1 (with-pathname (pathname pathname)
728     (%pathname-version pathname)))
729    
730 phg 1.13
731     ;;;; Namestrings
732    
733     ;;; %PRINT-NAMESTRING-PARSE-ERROR -- Internal
734     ;;;
735     (defun %print-namestring-parse-error (condition stream)
736     (format stream "Parse error in namestring: ~?~% ~A~% ~V@T^"
737     (namestring-parse-error-complaint condition)
738     (namestring-parse-error-arguments condition)
739     (namestring-parse-error-namestring condition)
740     (namestring-parse-error-offset condition)))
741    
742 ram 1.17 (define-condition namestring-parse-error (parse-error)
743 phg 1.13 ((complaint :init-form (required-argument))
744     (arguments :init-form nil)
745     (namestring :init-form (required-argument))
746     (offset :init-form (required-argument)))
747     (:report %print-namestring-parse-error))
748    
749    
750 ram 1.17 ;;; %PARSE-NAMESTRING -- Internal
751 phg 1.16 ;;;
752 ram 1.17 ;;; Handle the case where parse-namestring is actually parsing a namestring.
753     ;;; We pick off the :JUNK-ALLOWED case then find a host to use for parsing,
754     ;;; call the parser, then check if the host matches.
755     ;;;
756     (defun %parse-namestring (namestr host defaults start end junk-allowed)
757     (declare (type (or host null) host) (type string namestr)
758     (type index start) (type (or index null) end))
759     (if junk-allowed
760     (handler-case
761     (%parse-namestring namestr host defaults start end nil)
762     (namestring-parse-error (condition)
763     (values nil (namestring-parse-error-offset condition))))
764     (let* ((end (or end (length namestr)))
765     (parse-host (or host
766     (extract-logical-host-prefix namestr start end)
767     (pathname-host defaults))))
768     (unless parse-host
769     (error "When Host arg is not supplied, Defaults arg must ~
770     have a non-null PATHNAME-HOST."))
771 phg 1.16
772 ram 1.17 (multiple-value-bind
773     (new-host device directory file type version)
774     (funcall (host-parse parse-host) namestr start end)
775     (when (and host new-host (not (eq new-host host)))
776     (error "Host in namestring: ~S~@
777     does not match explicit host argument: ~S"
778     host))
779     (let ((pn-host (or new-host parse-host)))
780     (values (funcall (if (typep pn-host 'logical-host)
781     #'%make-logical-pathname
782     #'%make-pathname)
783     pn-host device directory file type version)
784     end))))))
785    
786    
787     ;;; EXTRACT-LOGICAL-HOST-PREFIX -- Internal
788 phg 1.16 ;;;
789 ram 1.17 ;;; If namestr begins with a colon-terminated, defined, logical host, then
790     ;;; return that host, otherwise return NIL.
791 phg 1.16 ;;;
792 ram 1.17 (defun extract-logical-host-prefix (namestr start end)
793 phg 1.16 (declare (type simple-base-string namestr)
794     (type index start end)
795 ram 1.17 (values (or logical-host null)))
796     (let ((colon-pos (position #\: namestr :start start :end end)))
797     (if colon-pos
798     (values (gethash (nstring-upcase (subseq namestr start colon-pos))
799     *logical-hosts*))
800     nil)))
801 phg 1.16
802 ram 1.17
803 phg 1.13 ;;; PARSE-NAMESTRING -- Interface
804     ;;;
805     (defun parse-namestring (thing
806     &optional host (defaults *default-pathname-defaults*)
807     &key (start 0) end junk-allowed)
808 phg 1.16 "Converts pathname, a pathname designator, into a pathname structure,
809     for a physical pathname, returns the printed representation. Host may be
810     a physical host structure or host namestring."
811     (declare (type path-designator thing)
812 phg 1.13 (type (or null host) host)
813 phg 1.16 (type pathname defaults)
814 phg 1.13 (type index start)
815     (type (or index null) end)
816 phg 1.16 (type (or t null) junk-allowed)
817     (values (or null pathname) (or null index)))
818     (typecase thing
819 ram 1.17 (simple-string
820     (%parse-namestring thing host defaults start end junk-allowed))
821     (string
822     (%parse-namestring (coerce thing 'simple-string)
823     host defaults start end junk-allowed))
824     (pathname
825 phg 1.16 (let* ((host (if host host (%pathname-host defaults)))
826     (hosts-name (funcall (host-unparse-host host) host)))
827     (unless (eq hosts-name (%pathname-host thing))
828     (error "Hosts do not match: ~S and ~S."
829     hosts-name (%pathname-host thing))))
830     (values thing start))
831     (stream
832 ram 1.17 ;; ### file-name really ought to retain the original pathname so that we
833     ;; know if it was logical.
834     (let ((namestr (file-name thing)))
835     (unless namestr
836     (error "Can't figure out the file associated with stream:~% ~S"
837     thing))
838     (%parse-namestring namestr host defaults 0 nil nil)))))
839 phg 1.13
840 ram 1.17
841 phg 1.13 ;;; NAMESTRING -- Interface
842     ;;;
843 wlott 1.1 (defun namestring (pathname)
844 phg 1.12 "Construct the full (name)string form of the pathname."
845 phg 1.16 (declare (type path-designator pathname)
846     (values (or null simple-base-string)))
847 wlott 1.1 (with-pathname (pathname pathname)
848     (let ((host (%pathname-host pathname)))
849 ram 1.17 (unless host
850     (error "Cannot determine the namestring for pathnames with no ~
851     host:~% ~S" pathname))
852     (funcall (host-unparse host) pathname))))
853 wlott 1.1
854 ram 1.17
855 phg 1.13 ;;; HOST-NAMESTRING -- Interface
856     ;;;
857 wlott 1.1 (defun host-namestring (pathname)
858 phg 1.13 "Returns a string representation of the name of the host in the pathname."
859 phg 1.16 (declare (type path-designator pathname)
860     (values (or null simple-base-string)))
861 wlott 1.1 (with-pathname (pathname pathname)
862     (let ((host (%pathname-host pathname)))
863     (if host
864     (funcall (host-unparse-host host) pathname)
865     (error
866     "Cannot determine the namestring for pathnames with no host:~% ~S"
867     pathname)))))
868    
869 phg 1.13 ;;; DIRECTORY-NAMESTRING -- Interface
870     ;;;
871 wlott 1.1 (defun directory-namestring (pathname)
872 phg 1.13 "Returns a string representation of the directories used in the pathname."
873 phg 1.16 (declare (type path-designator pathname)
874     (values (or null simple-base-string)))
875 wlott 1.1 (with-pathname (pathname pathname)
876     (let ((host (%pathname-host pathname)))
877     (if host
878     (funcall (host-unparse-directory host) pathname)
879     (error
880     "Cannot determine the namestring for pathnames with no host:~% ~S"
881     pathname)))))
882    
883 phg 1.13 ;;; FILE-NAMESTRING -- Interface
884     ;;;
885 wlott 1.1 (defun file-namestring (pathname)
886 phg 1.13 "Returns a string representation of the name used in the pathname."
887 phg 1.16 (declare (type path-designator pathname)
888     (values (or null simple-base-string)))
889 wlott 1.1 (with-pathname (pathname pathname)
890     (let ((host (%pathname-host pathname)))
891     (if host
892     (funcall (host-unparse-file host) pathname)
893     (error
894     "Cannot determine the namestring for pathnames with no host:~% ~S"
895     pathname)))))
896    
897 phg 1.13 ;;; ENOUGH-NAMESTRING -- Interface
898     ;;;
899 wlott 1.1 (defun enough-namestring (pathname
900     &optional (defaults *default-pathname-defaults*))
901 phg 1.13 "Returns an abbreviated pathname sufficent to identify the pathname relative
902     to the defaults."
903 phg 1.16 (declare (type path-designator pathname))
904 wlott 1.1 (with-pathname (pathname pathname)
905     (let ((host (%pathname-host pathname)))
906     (if host
907     (with-pathname (defaults defaults)
908     (funcall (host-unparse-enough host) pathname defaults))
909     (error
910     "Cannot determine the namestring for pathnames with no host:~% ~S"
911     pathname)))))
912    
913    
914     ;;;; Wild pathnames.
915    
916 phg 1.13 ;;; WILD-PATHNAME-P -- Interface
917     ;;;
918 wlott 1.1 (defun wild-pathname-p (pathname &optional field-key)
919 phg 1.13 "Predicate for determining whether pathname contains any wildcards."
920 phg 1.16 (declare (type path-designator pathname)
921 wlott 1.1 (type (member nil :host :device :directory :name :type :version)
922     field-key))
923     (with-pathname (pathname pathname)
924 ram 1.17 (flet ((frob (x)
925     (or (pattern-p x) (member x '(:wild :wild-inferiors)))))
926     (ecase field-key
927     ((nil)
928     (or (wild-pathname-p pathname :host)
929     (wild-pathname-p pathname :device)
930     (wild-pathname-p pathname :directory)
931     (wild-pathname-p pathname :name)
932     (wild-pathname-p pathname :type)
933     (wild-pathname-p pathname :version)))
934     (:host (frob (%pathname-host pathname)))
935     (:device (frob (%pathname-host pathname)))
936     (:directory (some #'frob (%pathname-directory pathname)))
937     (:name (frob (%pathname-name pathname)))
938     (:type (frob (%pathname-type pathname)))
939     (:version (frob (%pathname-version pathname)))))))
940 wlott 1.1
941 ram 1.17
942     ;;; PATHNAME-MATCH-P -- Interface
943 phg 1.13 ;;;
944 phg 1.16 (defun pathname-match-p (in-pathname in-wildname)
945 phg 1.12 "Pathname matches the wildname template?"
946 phg 1.16 (declare (type path-designator in-pathname))
947     (with-pathname (pathname in-pathname)
948     (with-pathname (wildname in-wildname)
949 ram 1.17 (macrolet ((frob (field &optional (op 'components-match ))
950 wlott 1.1 `(or (null (,field wildname))
951 ram 1.17 (,op (,field pathname) (,field wildname)))))
952 phg 1.16 (and (or (null (%pathname-host wildname))
953 ram 1.17 (eq (%pathname-host wildname) (%pathname-host pathname)))
954 wlott 1.1 (frob %pathname-device)
955 ram 1.17 (frob %pathname-directory directory-components-match)
956 wlott 1.1 (frob %pathname-name)
957     (frob %pathname-type)
958 ram 1.17 (frob %pathname-version))))))
959 wlott 1.1
960 ram 1.17
961 phg 1.13 ;;; SUBSTITUTE-INTO -- Internal
962     ;;;
963 ram 1.17 ;;; Place the substitutions into the pattern and return the string or pattern
964     ;;; that results. If DIDDLE-CASE is true, we diddle the result case as well,
965     ;;; in case we are translating between hosts with difference conventional case.
966     ;;; The second value is the tail of subs with all of the values that we used up
967     ;;; stripped off. Note that PATTERN-MATCHES matches all consecutive wildcards
968     ;;; as a single string, so we ignore subsequent contiguous wildcards.
969 phg 1.16 ;;;
970 ram 1.17 (defun substitute-into (pattern subs diddle-case)
971 wlott 1.1 (declare (type pattern pattern)
972 phg 1.16 (type list subs)
973     (values (or simple-base-string pattern)))
974 wlott 1.1 (let ((in-wildcard nil)
975     (pieces nil)
976     (strings nil))
977     (dolist (piece (pattern-pieces pattern))
978     (cond ((simple-string-p piece)
979 ram 1.17 (push piece strings)
980 wlott 1.1 (setf in-wildcard nil))
981     (in-wildcard)
982     (t
983 ram 1.17 (setf in-wildcard t)
984     (unless subs
985     (error "Not enough wildcards in FROM pattern to match ~
986     TO pattern:~% ~S"
987     pattern))
988 wlott 1.1 (let ((sub (pop subs)))
989 ram 1.17 (typecase sub
990 wlott 1.1 (pattern
991     (when strings
992     (push (apply #'concatenate 'simple-string
993     (nreverse strings))
994     pieces))
995     (dolist (piece (pattern-pieces sub))
996 ram 1.17 (push piece pieces)))
997 wlott 1.1 (simple-string
998 ram 1.17 (push sub strings))
999     (t
1000     (error "Can't substitute this into the middle of a word:~
1001     ~% ~S"
1002     sub)))))))
1003    
1004 wlott 1.1 (when strings
1005 phg 1.16 (push (apply #'concatenate 'simple-string (nreverse strings))
1006 wlott 1.1 pieces))
1007 ram 1.17 (values
1008     (maybe-diddle-case
1009     (if (and pieces (simple-string-p (car pieces)) (null (cdr pieces)))
1010     (car pieces)
1011     (make-pattern (nreverse pieces)))
1012     diddle-case)
1013     subs)))
1014 wlott 1.1
1015 ram 1.17
1016     ;;; DIDNT-MATCH-ERROR -- Internal
1017     ;;;
1018     ;;; Called when we can't see how source and from matched.
1019     ;;;
1020     (defun didnt-match-error (source from)
1021     (error "Pathname components from Source and From args to TRANSLATE-PATHNAME~@
1022     did not match:~% ~S ~S"
1023     source from))
1024    
1025    
1026 phg 1.13 ;;; TRANSLATE-COMPONENT -- Internal
1027     ;;;
1028 ram 1.17 ;;; Do TRANSLATE-COMPONENT for all components except host and directory.
1029 phg 1.13 ;;;
1030 ram 1.17 (defun translate-component (source from to diddle-case)
1031 wlott 1.1 (typecase to
1032     (pattern
1033 ram 1.17 (typecase from
1034     (pattern
1035     (typecase source
1036     (pattern
1037     (if (pattern= from source)
1038     source
1039     (didnt-match-error source from)))
1040     (simple-string
1041     (multiple-value-bind
1042     (won subs)
1043     (pattern-matches from source)
1044     (if won
1045     (values (substitute-into to subs diddle-case))
1046     (didnt-match-error source from))))
1047     (t
1048     (maybe-diddle-case source diddle-case))))
1049     ((member :wild)
1050     (values (substitute-into to (list source) diddle-case)))
1051     (t
1052     (if (components-match source from)
1053     (maybe-diddle-case source diddle-case)
1054     (didnt-match-error source from)))))
1055 wlott 1.1 ((member nil :wild)
1056 ram 1.17 (maybe-diddle-case source diddle-case))
1057 wlott 1.1 (t
1058     (if (components-match source from)
1059     to
1060 ram 1.17 (didnt-match-error source from)))))
1061 wlott 1.1
1062 ram 1.17
1063     ;;; COMPUTE-DIRECTORY-SUBSTITUTIONS -- Internal
1064     ;;;
1065     ;;; Return a list of all the things that we want to substitute into the TO
1066     ;;; pattern (the things matched by from on source.) When From contains
1067     ;;; :WILD-INFERIORS, the result contains a sublist of the matched source
1068     ;;; subdirectories.
1069     ;;;
1070     (defun compute-directory-substitutions (orig-source orig-from)
1071     (let ((source orig-source)
1072     (from orig-from))
1073     (collect ((subs))
1074     (loop
1075     (unless source
1076     (unless (every #'(lambda (x) (eq x :wild-inferiors)) from)
1077     (didnt-match-error orig-source orig-from))
1078     (subs ())
1079     (return))
1080     (unless from (didnt-match-error orig-source orig-from))
1081     (let ((from-part (pop from))
1082     (source-part (pop source)))
1083     (typecase from-part
1084     (pattern
1085     (typecase source-part
1086     (pattern
1087     (if (pattern= from-part source-part)
1088     (subs source-part)
1089     (didnt-match-error orig-source orig-from)))
1090     (simple-string
1091     (multiple-value-bind
1092     (won new-subs)
1093     (pattern-matches from-part source-part)
1094     (if won
1095     (dolist (sub new-subs)
1096     (subs sub))
1097     (didnt-match-error orig-source orig-from))))
1098     (t
1099     (didnt-match-error orig-source orig-from))))
1100     ((member :wild)
1101     (subs source-part))
1102     ((member :wild-inferiors)
1103     (let ((remaining-source (cons source-part source)))
1104     (collect ((res))
1105     (loop
1106     (when (directory-components-match remaining-source from)
1107     (return))
1108     (unless remaining-source
1109     (didnt-match-error orig-source orig-from))
1110     (res (pop remaining-source)))
1111     (subs (res))
1112     (setq source remaining-source))))
1113     (simple-string
1114     (unless (and (simple-string-p source-part)
1115     (string= from-part source-part))
1116     (didnt-match-error orig-source orig-from)))
1117     (t
1118     (didnt-match-error orig-source orig-from)))))
1119     (subs))))
1120    
1121    
1122 phg 1.13 ;;; TRANSLATE-DIRECTORIES -- Internal
1123     ;;;
1124 ram 1.17 ;;; Called by TRANSLATE-PATHNAME on the directory components of its argument
1125     ;;; pathanames to produce the result directory component. If any leaves the
1126     ;;; directory NIL, we return the source directory. The :RELATIVE or :ABSOLUTE
1127     ;;; is always taken from the source directory.
1128     ;;;
1129     (defun translate-directories (source from to diddle-case)
1130     (if (not (and source to from))
1131     (or to
1132     (mapcar #'(lambda (x) (maybe-diddle-case x diddle-case)) source))
1133     (collect ((res))
1134     (res (first source))
1135     (let ((subs-left (compute-directory-substitutions (rest source)
1136     (rest from))))
1137     (dolist (to-part (rest to))
1138     (typecase to-part
1139     ((member :wild)
1140     (assert subs-left)
1141     (let ((match (pop subs-left)))
1142     (when (listp match)
1143     (error ":WILD-INFERIORS not paired in from and to ~
1144     patterns:~% ~S ~S" from to))
1145     (maybe-diddle-case match diddle-case)))
1146     ((member :wild-inferiors)
1147     (assert subs-left)
1148     (let ((match (pop subs-left)))
1149     (unless (listp match)
1150     (error ":WILD-INFERIORS not paired in from and to ~
1151     patterns:~% ~S ~S" from to))
1152     (dolist (x match)
1153     (res (maybe-diddle-case x diddle-case)))))
1154     (pattern
1155     (multiple-value-bind
1156     (new new-subs-left)
1157     (substitute-into to-part subs-left diddle-case)
1158     (setf subs-left new-subs-left)
1159     new))
1160     (t (res to-part)))))
1161     (res))))
1162 wlott 1.1
1163 ram 1.17
1164 phg 1.13 ;;; TRANSLATE-PATHNAME -- Interface
1165     ;;;
1166 wlott 1.1 (defun translate-pathname (source from-wildname to-wildname &key)
1167 phg 1.13 "Use the source pathname to translate the from-wildname's wild and
1168     unspecified elements into a completed to-pathname based on the to-wildname."
1169 phg 1.16 (declare (type path-designator source from-wildname to-wildname))
1170 wlott 1.1 (with-pathname (source source)
1171     (with-pathname (from from-wildname)
1172     (with-pathname (to to-wildname)
1173 ram 1.17 (let* ((source-host (%pathname-host source))
1174     (to-host (%pathname-host to))
1175     (diddle-case
1176     (and source-host to-host
1177     (not (eq (host-customary-case source-host)
1178     (host-customary-case to-host))))))
1179     (macrolet ((frob (field &optional (op 'translate-component))
1180     `(let ((result (,op (,field source)
1181     (,field from)
1182     (,field to)
1183     diddle-case)))
1184 wlott 1.1 (if (eq result :error)
1185     (error "~S doesn't match ~S" source from)
1186 ram 1.17 result))))
1187     (%make-pathname (or to-host source-host)
1188     (frob %pathname-device)
1189     (frob %pathname-directory translate-directories)
1190     (frob %pathname-name)
1191     (frob %pathname-type)
1192     (frob %pathname-version))))))))
1193 wlott 1.1
1194    
1195     ;;;; Search lists.
1196    
1197     ;;; The SEARCH-LIST structure.
1198     ;;;
1199     (defstruct (search-list
1200     (:print-function %print-search-list)
1201     (:make-load-form-fun
1202     (lambda (search-list)
1203     (values `(intern-search-list ',(search-list-name search-list))
1204     nil))))
1205     ;;
1206     ;; The name of this search-list. Always stored in lowercase.
1207     (name (required-argument) :type simple-string)
1208     ;;
1209     ;; T if this search-list has been defined. Otherwise NIL.
1210     (defined nil :type (member t nil))
1211     ;;
1212     ;; The list of expansions for this search-list. Each expansion is the list
1213     ;; of directory components to use in place of this search-list.
1214 ram 1.4 (%expansions (%primitive c:make-value-cell nil))); :type list))
1215    
1216     (defun search-list-expansions (x)
1217     (%primitive c:value-cell-ref (search-list-%expansions x)))
1218    
1219     (defun (setf search-list-expansions) (val x)
1220     (%primitive c:value-cell-set (search-list-%expansions x) val))
1221 wlott 1.1
1222     (defun %print-search-list (sl stream depth)
1223     (declare (ignore depth))
1224     (print-unreadable-object (sl stream :type t)
1225     (write-string (search-list-name sl) stream)))
1226    
1227     ;;; *SEARCH-LISTS* -- internal.
1228     ;;;
1229     ;;; Hash table mapping search-list names to search-list structures.
1230     ;;;
1231     (defvar *search-lists* (make-hash-table :test #'equal))
1232    
1233     ;;; INTERN-SEARCH-LIST -- internal interface.
1234     ;;;
1235     ;;; When search-lists are encountered in namestrings, they are converted to
1236     ;;; search-list structures right then, instead of waiting until the search
1237     ;;; list used. This allows us to verify ahead of time that there are no
1238     ;;; circularities and makes expansion much quicker.
1239     ;;;
1240     (defun intern-search-list (name)
1241     (let ((name (string-downcase name)))
1242     (or (gethash name *search-lists*)
1243     (let ((new (make-search-list :name name)))
1244     (setf (gethash name *search-lists*) new)
1245     new))))
1246    
1247     ;;; CLEAR-SEARCH-LIST -- public.
1248     ;;;
1249     ;;; Clear the definition. Note: we can't remove it from the hash-table
1250     ;;; because there may be pathnames still refering to it. So we just clear
1251     ;;; out the expansions and ste defined to NIL.
1252     ;;;
1253     (defun clear-search-list (name)
1254     "Clear the current definition for the search-list NAME. Returns T if such
1255     a definition existed, and NIL if not."
1256     (let* ((name (string-downcase name))
1257     (search-list (gethash name *search-lists*)))
1258     (when (and search-list (search-list-defined search-list))
1259     (setf (search-list-defined search-list) nil)
1260     (setf (search-list-expansions search-list) nil)
1261     t)))
1262    
1263     ;;; CLEAR-ALL-SEARCH-LISTS -- sorta public.
1264     ;;;
1265     ;;; Again, we can't actually remove the entries from the hash-table, so we
1266     ;;; just mark them as being undefined.
1267     ;;;
1268     (defun clear-all-search-lists ()
1269     "Clear the definition for all search-lists. Only use this if you know
1270     what you are doing."
1271     (maphash #'(lambda (name search-list)
1272     (declare (ignore name))
1273     (setf (search-list-defined search-list) nil)
1274     (setf (search-list-expansions search-list) nil))
1275     *search-lists*)
1276     nil)
1277    
1278     ;;; EXTRACT-SEARCH-LIST -- internal.
1279     ;;;
1280     ;;; Extract the search-list from PATHNAME and return it. If PATHNAME
1281     ;;; doesn't start with a search-list, then either error (if FLAME-IF-NONE
1282     ;;; is true) or return NIL (if FLAME-IF-NONE is false).
1283     ;;;
1284     (defun extract-search-list (pathname flame-if-none)
1285     (with-pathname (pathname pathname)
1286     (let* ((directory (%pathname-directory pathname))
1287     (search-list (cadr directory)))
1288     (cond ((search-list-p search-list)
1289     search-list)
1290     (flame-if-none
1291 wlott 1.8 (error "~S doesn't start with a search-list." pathname))
1292 wlott 1.1 (t
1293     nil)))))
1294    
1295     ;;; SEARCH-LIST -- public.
1296     ;;;
1297     ;;; We have to convert the internal form of the search-list back into a
1298     ;;; bunch of pathnames.
1299     ;;;
1300     (defun search-list (pathname)
1301     "Return the expansions for the search-list starting PATHNAME. If PATHNAME
1302     does not start with a search-list, then an error is signaled. If
1303     the search-list has not been defined yet, then an error is signaled.
1304 phg 1.16 The expansion for a search-list can be set with SETF."
1305 wlott 1.1 (with-pathname (pathname pathname)
1306     (let ((search-list (extract-search-list pathname t))
1307 phg 1.16 (host (pathname-host pathname)))
1308 wlott 1.1 (if (search-list-defined search-list)
1309     (mapcar #'(lambda (directory)
1310     (make-pathname :host host
1311     :directory (cons :absolute directory)))
1312     (search-list-expansions search-list))
1313     (error "Search list ~S has not been defined yet." pathname)))))
1314 wlott 1.9
1315     ;;; SEARCH-LIST-DEFINED-P -- public.
1316     ;;;
1317     (defun search-list-defined-p (pathname)
1318     "Returns T if the search-list starting PATHNAME is currently defined, and
1319     NIL otherwise. An error is signaled if PATHNAME does not start with a
1320     search-list."
1321     (with-pathname (pathname pathname)
1322     (search-list-defined (extract-search-list pathname t))))
1323 wlott 1.1
1324     ;;; %SET-SEARCH-LIST -- public setf method
1325     ;;;
1326     ;;; Set the expansion for the search-list in PATHNAME. If this would result
1327     ;;; in any circularities, we flame out. If anything goes wrong, we leave the
1328     ;;; old defintion intact.
1329     ;;;
1330     (defun %set-search-list (pathname values)
1331     (let ((search-list (extract-search-list pathname t)))
1332     (labels
1333     ((check (target-list path)
1334     (when (eq search-list target-list)
1335     (error "That would result in a circularity:~% ~
1336     ~A~{ -> ~A~} -> ~A"
1337     (search-list-name search-list)
1338     (reverse path)
1339     (search-list-name target-list)))
1340     (when (search-list-p target-list)
1341     (push (search-list-name target-list) path)
1342     (dolist (expansion (search-list-expansions target-list))
1343     (check (car expansion) path))))
1344     (convert (pathname)
1345     (with-pathname (pathname pathname)
1346     (when (or (pathname-name pathname)
1347     (pathname-type pathname)
1348     (pathname-version pathname))
1349     (error "Search-lists cannot expand into pathnames that have ~
1350     a name, type, or ~%version specified:~% ~S"
1351     pathname))
1352     (let ((directory (pathname-directory pathname)))
1353 wlott 1.7 (let ((expansion
1354     (if directory
1355     (ecase (car directory)
1356     (:absolute (cdr directory))
1357     (:relative (cons (intern-search-list "default")
1358     (cdr directory))))
1359     (list (intern-search-list "default")))))
1360 wlott 1.1 (check (car expansion) nil)
1361     expansion)))))
1362     (setf (search-list-expansions search-list)
1363     (if (listp values)
1364     (mapcar #'convert values)
1365     (list (convert values)))))
1366     (setf (search-list-defined search-list) t))
1367     values)
1368    
1369     ;;; ENUMERATE-SEARCH-LIST -- public.
1370     ;;;
1371     (defmacro enumerate-search-list ((var pathname &optional result) &body body)
1372     "Execute BODY with VAR bound to each successive possible expansion for
1373     PATHNAME and then return RESULT. Note: if PATHNAME does not contain a
1374     search-list, then BODY is executed exactly once. Everything is wrapped
1375     in a block named NIL, so RETURN can be used to terminate early. Note:
1376     VAR is *not* bound inside of RESULT."
1377     (let ((body-name (gensym)))
1378     `(block nil
1379     (flet ((,body-name (,var)
1380     ,@body))
1381     (%enumerate-search-list ,pathname #',body-name)
1382     ,result))))
1383    
1384     (defun %enumerate-search-list (pathname function)
1385 ram 1.20 (let ((search-list (extract-search-list
1386     (translate-logical-pathname pathname)
1387     nil)))
1388 wlott 1.1 (cond
1389     ((not search-list)
1390     (funcall function pathname))
1391     ((not (search-list-defined search-list))
1392     (error "Undefined search list: ~A"
1393     (search-list-name search-list)))
1394     (t
1395     (let ((tail (cddr (pathname-directory pathname))))
1396     (dolist (expansion
1397     (search-list-expansions search-list))
1398     (%enumerate-search-list (make-pathname :defaults pathname
1399     :directory
1400     (cons :absolute
1401     (append expansion
1402     tail)))
1403     function)))))))
1404 phg 1.12
1405    
1406     ;;;; Logical pathname support. ANSI 92-102 specification.
1407 phg 1.16 ;;;; As logical-pathname translations are loaded they are canonicalized as
1408     ;;;; patterns to enable rapid efficent translation into physical pathnames.
1409 phg 1.12
1410 ram 1.17 ;;;; Utilities:
1411 phg 1.12
1412 ram 1.17 ;;; LOGICAL-WORD-OR-LOSE -- Internal
1413 phg 1.13 ;;;
1414 ram 1.17 ;;; Canonicalize a logical pathanme word by uppercasing it checking that it
1415     ;;; contains only legal characters.
1416 phg 1.16 ;;;
1417 ram 1.17 (defun logical-word-or-lose (word)
1418     (declare (string word))
1419     (let ((word (string-upcase word)))
1420     (dotimes (i (length word))
1421     (let ((ch (schar word i)))
1422     (unless (or (alpha-char-p ch) (digit-char-p ch) (char= ch #\-))
1423     (error 'namestring-parse-error
1424     :complaint "Logical namestring character ~
1425     is not alphanumeric or hyphen:~% ~S"
1426     :arguments (list ch)
1427     :namestring word :offset i))))
1428     word))
1429 phg 1.12
1430 ram 1.17
1431     ;;; FIND-LOGICAL-HOST -- Internal
1432     ;;;
1433     ;;; Given a logical host or string, return a logical host. If Error-p is
1434     ;;; NIL, then return NIL when no such host exists.
1435     ;;;
1436     (defun find-logical-host (thing &optional (errorp t))
1437     (etypecase thing
1438     (string
1439     (let ((found (gethash (logical-word-or-lose thing)
1440     *logical-hosts*)))
1441     (if (or found (not errorp))
1442     found
1443     (error "Logical host not yet defined: ~S" thing))))
1444     (logical-host thing)))
1445    
1446    
1447 phg 1.16 ;;; INTERN-LOGICAL-HOST -- Internal
1448 phg 1.13 ;;;
1449 ram 1.17 ;;; Given a logical host name or host, return a logical host, creating a new
1450     ;;; one if necessary.
1451 phg 1.16 ;;;
1452 ram 1.17 (defun intern-logical-host (thing)
1453     (declare (values logical-host))
1454     (or (find-logical-host thing nil)
1455     (let* ((name (logical-word-or-lose thing))
1456     (new (make-logical-host :name name)))
1457 phg 1.16 (setf (gethash name *logical-hosts*) new)
1458     new)))
1459 phg 1.12
1460 ram 1.17
1461     ;;;; Logical pathname parsing:
1462    
1463     ;;; MAYBE-MAKE-LOGICAL-PATTERN -- Internal
1464 phg 1.13 ;;;
1465 ram 1.17 ;;; Deal with multi-char wildcards in a logical pathname token.
1466 phg 1.16 ;;;
1467 ram 1.17 (defun maybe-make-logical-pattern (namestring chunks)
1468     (let ((chunk (caar chunks)))
1469     (collect ((pattern))
1470     (let ((last-pos 0)
1471     (len (length chunk)))
1472     (declare (fixnum last-pos))
1473     (loop
1474     (when (= last-pos len) (return))
1475     (let ((pos (or (position #\* chunk :start last-pos) len)))
1476     (if (= pos last-pos)
1477     (when (pattern)
1478     (error 'namestring-parse-error
1479     :complaint "Double asterisk inside of logical ~
1480     word: ~S"
1481     :arguments (list chunk)
1482     :namestring namestring
1483     :offset (+ (cdar chunks) pos)))
1484     (pattern (subseq chunk last-pos pos)))
1485     (if (= pos len)
1486     (return)
1487     (pattern :multi-char-wild))
1488     (setq last-pos (1+ pos)))))
1489     (assert (pattern))
1490     (if (cdr (pattern))
1491     (make-pattern (pattern))
1492     (let ((x (car (pattern))))
1493     (if (eq x :multi-char-wild)
1494     :wild
1495     x))))))
1496 phg 1.12
1497 ram 1.17
1498     ;;; LOGICAL-CHUNKIFY -- Internal
1499 phg 1.13 ;;;
1500 ram 1.17 ;;; Return a list of conses where the cdr is the start position and the car
1501     ;;; is a string (token) or character (punctuation.)
1502 phg 1.13 ;;;
1503 ram 1.17 (defun logical-chunkify (namestr start end)
1504     (collect ((chunks))
1505     (do ((i start (1+ i))
1506     (prev 0))
1507     ((= i end)
1508     (when (> end prev)
1509     (chunks (cons (nstring-upcase (subseq namestr prev end)) prev))))
1510     (let ((ch (schar namestr i)))
1511     (unless (or (alpha-char-p ch) (digit-char-p ch)
1512     (member ch '(#\- #\*)))
1513     (when (> i prev)
1514     (chunks (cons (nstring-upcase (subseq namestr prev i)) prev)))
1515     (setq prev (1+ i))
1516     (unless (member ch '(#\; #\: #\.))
1517     (error 'namestring-parse-error
1518     :complaint "Illegal character for logical pathname:~% ~S"
1519     :arguments (list ch)
1520     :namestring namestr
1521     :offset i))
1522     (chunks (cons ch i)))))
1523     (chunks)))
1524 phg 1.12
1525    
1526 phg 1.13 ;;; PARSE-LOGICAL-NAMESTRING -- Internal
1527     ;;;
1528 phg 1.16 ;;; Break up a logical-namestring, always a string, into its constituent
1529     ;;; parts.
1530 phg 1.13 ;;;
1531 ram 1.17 (defun parse-logical-namestring (namestr start end)
1532 phg 1.12 (declare (type simple-base-string namestr)
1533 ram 1.17 (type index start end))
1534     (collect ((directory))
1535     (let ((host nil)
1536     (name nil)
1537     (type nil)
1538     (version nil))
1539     (labels ((expecting (what chunks)
1540     (unless (and chunks (simple-string-p (caar chunks)))
1541     (error 'namestring-parse-error
1542     :complaint "Expecting ~A, got ~:[nothing~;~S~]."
1543     :arguments (list what (caar chunks))
1544     :namestring namestr
1545     :offset (if chunks (cdar chunks) end)))
1546     (caar chunks))
1547     (parse-host (chunks)
1548     (case (caadr chunks)
1549     (#\:
1550     (setq host
1551     (find-logical-host (expecting "a host name" chunks)))
1552     (parse-relative (cddr chunks)))
1553     (t
1554     (parse-relative chunks))))
1555     (parse-relative (chunks)
1556     (case (caar chunks)
1557     (#\;
1558     (directory :relative)
1559     (parse-directory (cdr chunks)))
1560     (t
1561     (directory :absolute)
1562     (parse-directory chunks))))
1563     (parse-directory (chunks)
1564     (case (caadr chunks)
1565     (#\;
1566     (directory
1567     (let ((res (expecting "a directory name" chunks)))
1568     (cond ((string= res "..") :up)
1569     ((string= res "**") :wild-inferiors)
1570     (t
1571     (maybe-make-logical-pattern namestr chunks)))))
1572     (parse-directory (cddr chunks)))
1573     (t
1574     (parse-name chunks))))
1575     (parse-name (chunks)
1576     (when chunks
1577     (expecting "a file name" chunks)
1578     (setq name (maybe-make-logical-pattern namestr chunks))
1579     (expecting-dot (cdr chunks))))
1580     (expecting-dot (chunks)
1581     (when chunks
1582     (unless (eql (caar chunks) #\.)
1583     (error 'namestring-parse-error
1584     :complaint "Expecting a dot, got ~S."
1585     :arguments (list (caar chunks))
1586     :namestring namestr
1587     :offset (cdar chunks)))
1588     (if type
1589     (parse-version (cdr chunks))
1590     (parse-type (cdr chunks)))))
1591     (parse-type (chunks)
1592     (expecting "a file type" chunks)
1593     (setq type (maybe-make-logical-pattern namestr chunks))
1594     (expecting-dot (cdr chunks)))
1595     (parse-version (chunks)
1596     (let ((str (expecting "a positive integer, * or NEWEST"
1597     chunks)))
1598     (cond
1599     ((string= str "*") (setq version :wild))
1600     ((string= str "NEWEST") (setq version :newest))
1601     (t
1602     (multiple-value-bind
1603     (res pos)
1604     (parse-integer str :junk-allowed t)
1605     (unless (and res (plusp res))
1606     (error 'namestring-parse-error
1607     :complaint "Expected a positive integer, ~
1608     got ~S"
1609     :arguments (list str)
1610     :namestring namestr
1611     :offset (+ pos (cdar chunks))))
1612     (setq version res)))))
1613     (when (cdr chunks)
1614     (error 'namestring-parse-error
1615     :complaint "Extra stuff after end of file name."
1616     :namestring namestr
1617     :offset (cdadr chunks)))))
1618     (parse-host (logical-chunkify namestr start end)))
1619     (values host :unspecific (directory) name type version))))
1620 phg 1.12
1621 ram 1.17
1622     ;;; Can't defvar here because not all host methods are loaded yet.
1623     (declaim (special *logical-pathname-defaults*))
1624    
1625     ;;; LOGICAL-PATHNAME -- Public
1626 phg 1.13 ;;;
1627 ram 1.17 (defun logical-pathname (pathspec)
1628     "Converts the pathspec argument to a logical-pathname and returns it."
1629     (declare (type (or logical-pathname string stream) pathspec)
1630     (values logical-pathname))
1631     (if (typep pathspec 'logical-pathname)
1632     pathspec
1633     (let ((res (parse-namestring pathspec nil *logical-pathname-defaults*)))
1634     (when (eq (%pathname-host res)
1635     (%pathname-host *logical-pathname-defaults*))
1636     (error "Logical namestring does not specify a host:~% ~S"
1637     pathspec))
1638     res)))
1639 phg 1.12
1640 ram 1.17
1641     ;;;; Logical pathname unparsing:
1642    
1643 phg 1.13 ;;; UNPARSE-LOGICAL-DIRECTORY -- Internal
1644     ;;;
1645 phg 1.12 (defun unparse-logical-directory (pathname)
1646 ram 1.17 (declare (type pathname pathname))
1647     (collect ((pieces))
1648     (let ((directory (%pathname-directory pathname)))
1649     (when directory
1650     (ecase (pop directory)
1651     (:absolute) ;; Nothing special.
1652     (:relative (pieces ";")))
1653     (dolist (dir directory)
1654     (cond ((or (stringp dir) (pattern-p dir))
1655     (pieces (unparse-logical-piece dir))
1656     (pieces ";"))
1657     ((eq dir :wild)
1658     (pieces "*;"))
1659     ((eq dir :wild-inferiors)
1660     (pieces "**;"))
1661     (t
1662     (error "Invalid directory component: ~S" dir))))))
1663     (apply #'concatenate 'simple-string (pieces))))
1664 phg 1.12
1665 ram 1.17
1666 phg 1.13 ;;; UNPARSE-LOGICAL-PIECE -- Internal
1667     ;;;
1668 phg 1.12 (defun unparse-logical-piece (thing)
1669     (etypecase thing
1670 ram 1.17 (simple-string thing)
1671 phg 1.12 (pattern
1672     (collect ((strings))
1673 ram 1.17 (dolist (piece (pattern-pieces thing))
1674     (etypecase piece
1675     (simple-string (strings piece))
1676     (keyword
1677     (cond ((eq piece :wild-inferiors)
1678     (strings "**"))
1679     ((eq piece :multi-char-wild)
1680     (strings "*"))
1681     (t (error "Invalid keyword: ~S" piece))))))
1682     (apply #'concatenate 'simple-string (strings))))))
1683 phg 1.12
1684    
1685 phg 1.13 ;;; UNPARSE-LOGICAL-NAMESTRING -- Internal
1686     ;;;
1687 phg 1.12 (defun unparse-logical-namestring (pathname)
1688     (declare (type logical-pathname pathname))
1689     (concatenate 'simple-string
1690 ram 1.17 (logical-host-name (%pathname-host pathname)) ":"
1691 phg 1.12 (unparse-logical-directory pathname)
1692 ram 1.17 (unparse-unix-file pathname)))
1693 phg 1.12
1694 ram 1.17
1695     ;;;; Logical pathname translations:
1696 phg 1.12
1697 ram 1.17 ;;; CANONICALIZE-LOGICAL-PATHNAME-TRANSLATIONS -- Internal
1698 phg 1.13 ;;;
1699     ;;; Verify that the list of translations consists of lists and prepare
1700 phg 1.16 ;;; canonical translations (parse pathnames and expand out wildcards into
1701     ;;; patterns).
1702 phg 1.13 ;;;
1703 ram 1.17 (defun canonicalize-logical-pathname-translations (transl-list host)
1704     (declare (type list transl-list) (type host host)
1705     (values list))
1706     (collect ((res))
1707     (dolist (tr transl-list)
1708     (unless (and (consp tr) (= (length tr) 2))
1709     (error "Logical pathname translation is not a two-list:~% ~S"
1710     tr))
1711     (let ((from (first tr)))
1712     (res (list (if (typep from 'logical-pathname)
1713     from
1714     (parse-namestring from host))
1715     (pathname (second tr))))))
1716     (res)))
1717 phg 1.12
1718 ram 1.17
1719 phg 1.13 ;;; LOGICAL-PATHNAME-TRANSLATIONS -- Public
1720     ;;;
1721 phg 1.12 (defun logical-pathname-translations (host)
1722     "Return the (logical) host object argument's list of translations."
1723 ram 1.17 (declare (type (or string logical-host) host)
1724 phg 1.12 (values list))
1725 ram 1.17 (logical-host-translations (find-logical-host host)))
1726 phg 1.12
1727 ram 1.17
1728 phg 1.13 ;;; (SETF LOGICAL-PATHNAME-TRANSLATIONS) -- Public
1729     ;;;
1730 phg 1.12 (defun (setf logical-pathname-translations) (translations host)
1731     "Set the translations list for the logical host argument.
1732     Return translations."
1733 ram 1.17 (declare (type (or string logical-host) host)
1734 phg 1.12 (type list translations)
1735     (values list))
1736    
1737 ram 1.17 (let ((host (intern-logical-host host)))
1738     (setf (logical-host-canon-transls host)
1739     (canonicalize-logical-pathname-translations translations host))
1740     (setf (logical-host-translations host) translations)))
1741    
1742    
1743 phg 1.12 ;;; The search mechanism for loading pathname translations uses the CMUCL
1744     ;;; extension of search-lists. The user can add to the library: search-list
1745     ;;; using setf. The file for translations should have the name defined by
1746 phg 1.14 ;;; the hostname (a string) and with type component "translations".
1747 phg 1.12
1748 phg 1.13 ;;; LOAD-LOGICAL-PATHNAME-TRANSLATIONS -- Public
1749     ;;;
1750 phg 1.12 (defun load-logical-pathname-translations (host)
1751     "Search for a logical pathname named host, if not already defined. If already
1752     defined no attempt to find or load a definition is attempted and NIL is
1753     returned. If host is not already defined, but definition is found and loaded
1754     successfully, T is returned, else error."
1755 ram 1.17 (declare (type string host)
1756     (values (member t nil)))
1757     (unless (find-logical-host host nil)
1758     (with-open-file (in-str (make-pathname :defaults "library:"
1759     :name host
1760     :type "translations"))
1761     (format *error-output*
1762     ";; Loading pathname translations from ~A~%"
1763     (namestring (truename in-str)))
1764     (setf (logical-pathname-translations host) (read in-str)))
1765     t))
1766 phg 1.12
1767    
1768 phg 1.13 ;;; TRANSLATE-LOGICAL-PATHNAME -- Public
1769     ;;;
1770 phg 1.12 (defun translate-logical-pathname (pathname &key)
1771     "Translates pathname to a physical pathname, which is returned."
1772 phg 1.16 (declare (type path-designator pathname)
1773     (values (or null pathname)))
1774 ram 1.17 (typecase pathname
1775     (logical-pathname
1776     (dolist (x (logical-host-canon-transls (%pathname-host pathname))
1777     (error "No translation for ~S" pathname))
1778     (destructuring-bind (from to) x
1779     (when (pathname-match-p pathname from)
1780     (return (translate-logical-pathname
1781     (translate-pathname pathname from to)))))))
1782     (pathname pathname)
1783     (t (translate-logical-pathname (logical-pathname pathname)))))
1784 phg 1.12
1785 ram 1.17 (defvar *logical-pathname-defaults*
1786     (%make-logical-pathname (make-logical-host :name "BOGUS") :unspecific
1787     nil nil nil nil))

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