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Revision 1.61 - (show annotations)
Sat Jun 7 17:56:28 2003 UTC (10 years, 10 months ago) by toy
Branch: MAIN
Changes since 1.60: +3 -2 lines
More simple-streams updates from Paul Foley:

o An update to fix Gerd's complaint about :simple-streams being on
  *features*
o Corrects a few bugs
o Renames all the strategy functions
o Gets rid of DEVICE-EXTEND (Duane Rettig tells me it's going away in
  the next ACL release)
o A start on getting stream& composition working.
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 ;;;
6 (ext:file-comment
7 "$Header: /tiger/var/lib/cvsroots/cmucl/src/code/pathname.lisp,v 1.61 2003/06/07 17:56:28 toy Exp $")
8 ;;;
9 ;;; **********************************************************************
10 ;;;
11 ;;; Machine/filesystem independent pathname functions for CMU Common Lisp.
12 ;;;
13 ;;; Written by William Lott, Paul Gleichauf and Rob MacLachlan.
14 ;;; Earlier version written by Jim Large and Rob MacLachlan
15 ;;;
16 ;;; **********************************************************************
17
18 (in-package "LISP")
19
20 (export '(pathname pathnamep logical-pathname
21 parse-namestring merge-pathnames make-pathname
22 pathname-host pathname-device pathname-directory pathname-name
23 pathname-type pathname-version namestring file-namestring
24 directory-namestring host-namestring enough-namestring
25 wild-pathname-p pathname-match-p translate-pathname
26 translate-logical-pathname logical-pathname-translations
27 load-logical-pathname-translations *default-pathname-defaults*))
28
29 (in-package "EXTENSIONS")
30 (export '(search-list search-list-defined-p clear-search-list
31 enumerate-search-list *autoload-translations*))
32
33 (in-package "LISP")
34
35 (defvar *autoload-translations* nil
36 "When non-nil, attempt to load \"library:<host>.translations\" to resolve
37 an otherwise undefined logical host.")
38
39
40 ;;;; HOST structures
41
42 ;;; The host structure holds the functions that both parse the pathname
43 ;;; information into sturcture slot entries, and after translation the inverse
44 ;;; (unparse) functions.
45 ;;;
46 (defstruct (host
47 (:print-function %print-host))
48 (parse (required-argument) :type function)
49 (unparse (required-argument) :type function)
50 (unparse-host (required-argument) :type function)
51 (unparse-directory (required-argument) :type function)
52 (unparse-file (required-argument) :type function)
53 (unparse-enough (required-argument) :type function)
54 (customary-case (required-argument) :type (member :upper :lower)))
55
56 ;;; %PRINT-HOST -- Internal
57 ;;;
58 (defun %print-host (host stream depth)
59 (declare (ignore depth))
60 (print-unreadable-object (host stream :type t)))
61
62 (defstruct (logical-host
63 (:include host
64 (:parse #'parse-logical-namestring)
65 (:unparse #'unparse-logical-namestring)
66 (:unparse-host
67 #'(lambda (x) (logical-host-name (%pathname-host x))))
68 (:unparse-directory #'unparse-logical-directory)
69 (:unparse-file #'unparse-unix-file)
70 (:unparse-enough #'unparse-enough-namestring)
71 (:customary-case :upper))
72 (:make-load-form-fun make-logical-host-load-form-fun))
73 (name "" :type simple-base-string)
74 (translations nil :type list)
75 (canon-transls nil :type list))
76
77 (defun make-logical-host-load-form-fun (logical-host)
78 (values `(find-logical-host ',(logical-host-name logical-host))
79 nil))
80
81 ;;; The various magic tokens that are allowed to appear in pretty much all
82 ;;; pathname components.
83 ;;;
84 (deftype component-tokens ()
85 '(member nil :unspecific :wild))
86
87 ;;;; Pathname structures
88
89 (defstruct (pathname
90 (:conc-name %pathname-)
91 (:print-function %print-pathname)
92 (:constructor
93 %make-pathname (host device directory name type version))
94 (:predicate pathnamep)
95 (:make-load-form-fun :just-dump-it-normally))
96 ;; Slot holds the host, at present either a UNIX or logical host.
97 (host nil :type (or host null))
98 ;; Device is the name of a logical or physical device holding files.
99 (device nil :type (or simple-string component-tokens))
100 ;; A list of strings that are the component subdirectory components.
101 (directory nil :type list)
102 ;; The filename.
103 (name nil :type (or simple-string pattern component-tokens))
104 ;; The type extension of the file.
105 (type nil :type (or simple-string pattern component-tokens))
106 ;; The version number of the file, a positive integer, but not supported
107 ;; on standard UNIX filesystems.
108 (version nil :type (or integer component-tokens (member :newest))))
109
110 ;;; %PRINT-PATHNAME -- Internal
111 ;;;
112 ;;; The printed representation of the pathname structure.
113 ;;;
114 (defun %print-pathname (pathname stream depth)
115 (declare (ignore depth))
116 (let ((namestring (handler-case (namestring pathname)
117 (error nil))))
118 (cond (namestring
119 (if (or *print-escape* *print-readably*)
120 (format stream "#p~S" namestring)
121 (format stream "~A" namestring)))
122 (*print-readably*
123 (error "~S Cannot be printed readably." pathname))
124 (t
125 (funcall (formatter "#<Unprintable pathname, Host=~S, Device=~S, ~
126 Directory=~S, Name=~S, Type=~S, Version=~S>")
127 stream
128 (%pathname-host pathname)
129 (%pathname-device pathname)
130 (%pathname-directory pathname)
131 (%pathname-name pathname)
132 (%pathname-type pathname)
133 (%pathname-version pathname))))))
134
135 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
136 ;;;
137 ;;; Logical pathnames have the following format:
138 ;;;
139 ;;; logical-namestring ::=
140 ;;; [host ":"] [";"] {directory ";"}* [name] ["." type ["." version]]
141 ;;;
142 ;;; host ::= word
143 ;;; directory ::= word | wildcard-word | **
144 ;;; name ::= word | wildcard-word
145 ;;; type ::= word | wildcard-word
146 ;;; version ::= pos-int | newest | NEWEST | *
147 ;;; word ::= {uppercase-letter | digit | -}+
148 ;;; wildcard-word ::= [word] '* {word '*}* [word]
149 ;;; pos-int ::= integer > 0
150 ;;;
151 ;;; Physical pathnames include all these slots and a device slot.
152 ;;;
153 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
154
155 ;; Logical pathnames are a subclass of pathname, their class relations are
156 ;; mimiced using structures for efficency.
157
158 (defstruct (logical-pathname
159 (:conc-name %logical-pathname-)
160 (:print-function %print-logical-pathname)
161 (:include pathname)
162 (:constructor %make-logical-pathname
163 (host device directory name type version))
164 (:make-load-form-fun :just-dump-it-normally)))
165
166 (declaim (freeze-type logical-pathname logical-host))
167
168 ;;; %PRINT-LOGICAL-PATHNAME -- Internal
169 ;;;
170 ;;; The printed representation of the logical-pathname structure.
171 ;;; The potential conflict with search-lists requires isolating the printed
172 ;;; representation to use the i/o macro #.(logical-pathname <path-designator>).
173 ;;;
174 (defun %print-logical-pathname (pathname stream depth)
175 (declare (ignore depth))
176 (let ((namestring (handler-case (namestring pathname)
177 (error nil))))
178 (cond (namestring
179 (if (or *print-escape* *print-readably*)
180 (format stream "#.(logical-pathname ~S)" namestring)
181 (format stream "~A" namestring)))
182 (*print-readably*
183 (error "~S Cannot be printed readably." pathname))
184 (t
185 (funcall (formatter "#<Unprintable pathname, Host=~S, ~
186 Directory=~S, File=~S, Name=~S, Version=~S>")
187 stream
188 (%pathname-host pathname)
189 (%pathname-directory pathname)
190 (%pathname-name pathname)
191 (%pathname-type pathname)
192 (%pathname-version pathname))))))
193
194 ;;; %MAKE-PATHNAME-OBJECT -- internal
195 ;;;
196 ;;; A pathname is logical if the host component is a logical-host.
197 ;;; This constructor is used to make an instance of the correct type
198 ;;; from parsed arguments.
199
200 (defun %make-pathname-object (host device directory name type version)
201 (if (typep host 'logical-host)
202 (%make-logical-pathname host :unspecific directory name type version)
203 (%make-pathname host device directory name type version)))
204
205 ;;; *LOGICAL-HOSTS* --internal.
206 ;;;
207 ;;; Hash table searching maps a logical-pathname's host to their physical
208 ;;; pathname translation.
209
210 (defvar *logical-hosts* (make-hash-table :test #'equal))
211
212 ;;; PATH-DESIGNATOR -- internal type
213 ;;;
214 (deftype path-designator ()
215 "A path specification, either a string, stream or pathname."
216 '(or string stream pathname))
217
218
219 ;;;; Patterns
220
221 ;;; Patterns are a list of entries and wildcards used for pattern matches
222 ;;; of translations.
223
224 (defstruct (pattern
225 (:print-function %print-pattern)
226 (:make-load-form-fun :just-dump-it-normally)
227 (:constructor make-pattern (pieces)))
228 (pieces nil :type list))
229
230 ;;; %PRINT-PATTERN -- Internal
231 ;;;
232 (defun %print-pattern (pattern stream depth)
233 (declare (ignore depth))
234 (print-unreadable-object (pattern stream :type t)
235 (if *print-pretty*
236 (let ((*print-escape* t))
237 (pprint-fill stream (pattern-pieces pattern) nil))
238 (prin1 (pattern-pieces pattern) stream))))
239
240 ;;; PATTERN= -- Internal
241 ;;;
242 (defun pattern= (pattern1 pattern2)
243 (declare (type pattern pattern1 pattern2))
244 (let ((pieces1 (pattern-pieces pattern1))
245 (pieces2 (pattern-pieces pattern2)))
246 (and (= (length pieces1) (length pieces2))
247 (every #'(lambda (piece1 piece2)
248 (typecase piece1
249 (simple-string
250 (and (simple-string-p piece2)
251 (string= piece1 piece2)))
252 (cons
253 (and (consp piece2)
254 (eq (car piece1) (car piece2))
255 (string= (cdr piece1) (cdr piece2))))
256 (t
257 (eq piece1 piece2))))
258 pieces1
259 pieces2))))
260
261 ;;; PATTERN-MATCHES -- Internal
262 ;;;
263 ;;; If the string matches the pattern returns the multiple values T and a
264 ;;; list of the matched strings.
265 ;;;
266 (defun pattern-matches (pattern string)
267 (declare (type pattern pattern)
268 (type simple-string string))
269 (let ((len (length string)))
270 (labels ((maybe-prepend (subs cur-sub chars)
271 (if cur-sub
272 (let* ((len (length chars))
273 (new (make-string len))
274 (index len))
275 (dolist (char chars)
276 (setf (schar new (decf index)) char))
277 (cons new subs))
278 subs))
279 (matches (pieces start subs cur-sub chars)
280 (if (null pieces)
281 (if (= start len)
282 (values t (maybe-prepend subs cur-sub chars))
283 (values nil nil))
284 (let ((piece (car pieces)))
285 (etypecase piece
286 (simple-string
287 (let ((end (+ start (length piece))))
288 (and (<= end len)
289 (string= piece string
290 :start2 start :end2 end)
291 (matches (cdr pieces) end
292 (maybe-prepend subs cur-sub chars)
293 nil nil))))
294 (list
295 (ecase (car piece)
296 (:character-set
297 (and (< start len)
298 (let ((char (schar string start)))
299 (if (find char (cdr piece) :test #'char=)
300 (matches (cdr pieces) (1+ start) subs t
301 (cons char chars))))))))
302 ((member :single-char-wild)
303 (and (< start len)
304 (matches (cdr pieces) (1+ start) subs t
305 (cons (schar string start) chars))))
306 ((member :multi-char-wild)
307 (multiple-value-bind
308 (won new-subs)
309 (matches (cdr pieces) start subs t chars)
310 (if won
311 (values t new-subs)
312 (and (< start len)
313 (matches pieces (1+ start) subs t
314 (cons (schar string start)
315 chars)))))))))))
316 (multiple-value-bind
317 (won subs)
318 (matches (pattern-pieces pattern) 0 nil nil nil)
319 (values won (reverse subs))))))
320
321
322 ;;; DIRECTORY-COMPONENTS-MATCH -- Internal
323 ;;;
324 ;;; Pathname-match-p for directory components. If thing is empty
325 ;;; then it matches :wild, (:absolute :wild-inferiors), or (:relative
326 ;;; :wild-inferiors).
327 ;;;
328 (defun directory-components-match (thing wild)
329 (or (eq thing wild)
330 (eq wild :wild)
331 (and (consp wild)
332 (let ((wild1 (first wild)))
333 (cond ((and (null thing) (member wild1 '(:absolute :relative)))
334 (equal (rest wild) '(:wild-inferiors)))
335 ((eq wild1 :wild-inferiors)
336 (let ((wild-subdirs (rest wild)))
337 (or (null wild-subdirs)
338 (loop
339 (when (directory-components-match thing
340 wild-subdirs)
341 (return t))
342 (pop thing)
343 (unless thing (return nil))))))
344 ((consp thing)
345 (and (components-match (first thing) wild1)
346 (directory-components-match (rest thing)
347 (rest wild)))))))))
348
349
350 ;;; COMPONENTS-MATCH -- Internal
351 ;;;
352 ;;; Return true if pathname component Thing is matched by Wild. Not
353 ;;; commutative.
354 ;;;
355 (defun components-match (thing wild)
356 (declare (type (or pattern symbol simple-string integer) thing wild))
357 (or (eq thing wild)
358 (eq wild :wild)
359 (typecase thing
360 (simple-base-string
361 ;; String is matched by itself, a matching pattern or :WILD.
362 (typecase wild
363 (pattern
364 (values (pattern-matches wild thing)))
365 (simple-base-string
366 (string= thing wild))))
367 (pattern
368 ;; A pattern is only matched by an identical pattern.
369 (and (pattern-p wild) (pattern= thing wild)))
370 (integer
371 ;; an integer (version number) is matched by :WILD or the same
372 ;; integer. This branch will actually always be NIL as long is the
373 ;; version is a fixnum.
374 (eql thing wild)))))
375
376
377 ;;; COMPARE-COMPONENT -- Internal
378 ;;;
379 ;;; A predicate for comparing two pathname slot component sub-entries.
380 ;;;
381 (defun compare-component (this that)
382 (or (eql this that)
383 (typecase this
384 (simple-string
385 (and (simple-string-p that)
386 (string= this that)))
387 (pattern
388 (and (pattern-p that)
389 (pattern= this that)))
390 (cons
391 (and (consp that)
392 (compare-component (car this) (car that))
393 (compare-component (cdr this) (cdr that)))))))
394
395
396 ;;;; Pathname functions.
397
398 ;;; Implementation determined defaults to pathname slots.
399
400 (defvar *default-pathname-defaults*)
401
402 ;;; PATHNAME= -- Internal
403 ;;;
404 (defun pathname= (pathname1 pathname2)
405 (declare (type pathname pathname1)
406 (type pathname pathname2))
407 (and (eq (%pathname-host pathname1)
408 (%pathname-host pathname2))
409 (compare-component (%pathname-device pathname1)
410 (%pathname-device pathname2))
411 (compare-component (%pathname-directory pathname1)
412 (%pathname-directory pathname2))
413 (compare-component (%pathname-name pathname1)
414 (%pathname-name pathname2))
415 (compare-component (%pathname-type pathname1)
416 (%pathname-type pathname2))
417 (compare-component (%pathname-version pathname1)
418 (%pathname-version pathname2))))
419
420 ;;; WITH-PATHNAME -- Internal
421 ;;; Converts the expr, a pathname designator (a pathname, or string, or
422 ;;; stream), into a pathname.
423 ;;;
424 (defmacro with-pathname ((var expr) &body body)
425 `(let ((,var (let ((,var ,expr))
426 (etypecase ,var
427 (pathname ,var)
428 (string (parse-namestring ,var))
429 (file-stream (file-name ,var))
430 (stream:file-simple-stream (file-name ,var))))))
431 ,@body))
432
433 ;;; WITH-HOST -- Internal
434 ;;;
435 ;;; Converts the var, a host or string name for a host, into a logical-host
436 ;;; structure or nil if not defined.
437 ;;;
438 ;;; pw notes 1/12/97 this potentially useful macro is not used anywhere
439 ;;; and 'find-host' is not defined. 'find-logical-host' seems to be needed.
440 ;;;
441 (defmacro with-host ((var expr) &body body)
442 `(let ((,var (let ((,var ,expr))
443 (typecase ,var
444 (logical-host ,var)
445 (string (find-logical-host ,var nil))
446 (t nil)))))
447 ,@body))
448
449 ;;; PATHNAME -- Interface
450 ;;;
451 (defun pathname (thing)
452 "Convert thing (a pathname, string or stream) into a pathname."
453 (declare (type path-designator thing))
454 (with-pathname (pathname thing)
455 pathname))
456
457 ;;; MAYBE-DIDDLE-CASE -- Internal
458 ;;;
459 ;;; Change the case of thing if diddle-p T.
460 ;;;
461 (defun maybe-diddle-case (thing diddle-p)
462 (if (and diddle-p (not (or (symbolp thing) (integerp thing))))
463 (labels ((check-for (pred in)
464 (typecase in
465 (pattern
466 (dolist (piece (pattern-pieces in))
467 (when (typecase piece
468 (simple-string
469 (check-for pred piece))
470 (cons
471 (case (car in)
472 (:character-set
473 (check-for pred (cdr in))))))
474 (return t))))
475 (list
476 (dolist (x in)
477 (when (check-for pred x)
478 (return t))))
479 (simple-base-string
480 (dotimes (i (length in))
481 (when (funcall pred (schar in i))
482 (return t))))
483 (t nil)))
484 (diddle-with (fun thing)
485 (typecase thing
486 (pattern
487 (make-pattern
488 (mapcar #'(lambda (piece)
489 (typecase piece
490 (simple-base-string
491 (funcall fun piece))
492 (cons
493 (case (car piece)
494 (:character-set
495 (cons :character-set
496 (funcall fun (cdr piece))))
497 (t
498 piece)))
499 (t
500 piece)))
501 (pattern-pieces thing))))
502 (list
503 (mapcar fun thing))
504 (simple-base-string
505 (funcall fun thing))
506 (t
507 thing))))
508 (let ((any-uppers (check-for #'upper-case-p thing))
509 (any-lowers (check-for #'lower-case-p thing)))
510 (cond ((and any-uppers any-lowers)
511 ;; Mixed case, stays the same.
512 thing)
513 (any-uppers
514 ;; All uppercase, becomes all lower case.
515 (diddle-with #'(lambda (x) (if (stringp x)
516 (string-downcase x)
517 x)) thing))
518 (any-lowers
519 ;; All lowercase, becomes all upper case.
520 (diddle-with #'(lambda (x) (if (stringp x)
521 (string-upcase x)
522 x)) thing))
523 (t
524 ;; No letters? I guess just leave it.
525 thing))))
526 thing))
527
528
529 ;;; MERGE-DIRECTORIES -- Internal
530 ;;;
531 (defun merge-directories (dir1 dir2 diddle-case)
532 (if (or (eq (car dir1) :absolute)
533 (null dir2))
534 dir1
535 (let ((results nil))
536 (flet ((add (dir)
537 (if (and (eq dir :back)
538 results
539 (not (eq (car results) :back)))
540 (pop results)
541 (push dir results))))
542 (dolist (dir (maybe-diddle-case dir2 diddle-case))
543 (add dir))
544 (dolist (dir (cdr dir1))
545 (add dir)))
546 (reverse results))))
547
548 ;;; MERGE-PATHNAMES -- Interface
549 ;;;
550 (defun merge-pathnames (pathname
551 &optional
552 (defaults *default-pathname-defaults*)
553 (default-version :newest))
554 "Construct a filled in pathname by completing the unspecified components
555 from the defaults."
556 (declare (type path-designator pathname)
557 (type path-designator defaults)
558 (values pathname))
559 (with-pathname (defaults defaults)
560 (let ((pathname (let ((*default-pathname-defaults* defaults))
561 (pathname pathname))))
562 (let* ((default-host (%pathname-host defaults))
563 (pathname-host (%pathname-host pathname))
564 (diddle-case
565 (and default-host pathname-host
566 (not (eq (host-customary-case default-host)
567 (host-customary-case pathname-host))))))
568 (%make-pathname-object
569 (or pathname-host default-host)
570 (or (%pathname-device pathname)
571 (maybe-diddle-case (%pathname-device defaults)
572 diddle-case))
573 (merge-directories (%pathname-directory pathname)
574 (%pathname-directory defaults)
575 diddle-case)
576 (or (%pathname-name pathname)
577 (maybe-diddle-case (%pathname-name defaults)
578 diddle-case))
579 (or (%pathname-type pathname)
580 (maybe-diddle-case (%pathname-type defaults)
581 diddle-case))
582 (or (if (null (%pathname-name pathname))
583 (or (%pathname-version pathname)
584 (%pathname-version defaults))
585 (%pathname-version pathname))
586 default-version))))))
587
588 ;;; IMPORT-DIRECTORY -- Internal
589 ;;;
590 (defun import-directory (directory diddle-case)
591 (etypecase directory
592 (null nil)
593 ((member :wild) '(:absolute :wild-inferiors))
594 ((member :unspecific) '(:relative))
595 (list
596 (collect ((results))
597 (ecase (pop directory)
598 (:absolute
599 (results :absolute)
600 (when (search-list-p (car directory))
601 (results (pop directory))))
602 (:relative
603 (results :relative)))
604 (dolist (piece directory)
605 (cond ((member piece '(:wild :wild-inferiors :up :back))
606 (results piece))
607 ((or (simple-string-p piece) (pattern-p piece))
608 (results (maybe-diddle-case piece diddle-case)))
609 ((stringp piece)
610 (results (maybe-diddle-case (coerce piece 'simple-string)
611 diddle-case)))
612 (t
613 (error "~S is not allowed as a directory component." piece))))
614 (results)))
615 (simple-string
616 `(:absolute
617 ,(maybe-diddle-case directory diddle-case)))
618 (string
619 `(:absolute
620 ,(maybe-diddle-case (coerce directory 'simple-string)
621 diddle-case)))))
622
623 ;;; MAKE-PATHNAME -- Interface
624 ;;;
625 (defun make-pathname (&key host
626 (device nil devp)
627 (directory nil dirp)
628 (name nil namep)
629 (type nil typep)
630 (version nil versionp)
631 defaults
632 (case :local))
633 "Makes a new pathname from the component arguments. Note that host is
634 a host-structure or string."
635 (declare (type (or string host component-tokens) host)
636 (type (or string component-tokens) device)
637 (type (or list string pattern component-tokens) directory)
638 (type (or string pattern component-tokens) name type)
639 (type (or integer component-tokens (member :newest)) version)
640 (type (or path-designator null) defaults)
641 (type (member :common :local) case))
642 (let* ((defaults (when defaults
643 (with-pathname (defaults defaults) defaults)))
644 (default-host (if defaults
645 (%pathname-host defaults)
646 (%pathname-host *default-pathname-defaults*)))
647 ;; toy@rtp.ericsson.se: CLHS says make-pathname can take a
648 ;; string (as a logical-host) for the host part. We map that
649 ;; string into the corresponding logical host structure.
650
651 ;; pw@snoopy.mv.com:
652 ;; HyperSpec says for the arg to MAKE-PATHNAME;
653 ;; "host---a valid physical pathname host. ..."
654 ;; where it probably means -- a valid pathname host.
655 ;; "valid pathname host n. a valid physical pathname host or
656 ;; a valid logical pathname host."
657 ;; and defines
658 ;; "valid physical pathname host n. any of a string,
659 ;; a list of strings, or the symbol :unspecific,
660 ;; that is recognized by the implementation as the name of a host."
661 ;; "valid logical pathname host n. a string that has been defined
662 ;; as the name of a logical host. ..."
663 ;; HS is silent on what happens if the :host arg is NOT one of these.
664 ;; It seems an error message is appropriate.
665 (host (typecase host
666 (host host) ; A valid host, use it.
667 ((string 0) default-host) ; "" cannot be a logical host
668 (string (find-logical-host host t)) ; logical-host or lose.
669 (t default-host))) ; unix-host
670 (diddle-args (and (eq (host-customary-case host) :lower)
671 (eq case :common)))
672 (diddle-defaults
673 (not (eq (host-customary-case host)
674 (host-customary-case default-host))))
675 (dev (if devp device (if defaults (%pathname-device defaults))))
676 (dir (import-directory directory diddle-args))
677 (ver (cond
678 (versionp version)
679 (defaults (%pathname-version defaults))
680 (t nil))))
681 (when (and defaults (not dirp))
682 (setf dir
683 (merge-directories dir
684 (%pathname-directory defaults)
685 diddle-defaults)))
686
687 ;; A bit of sanity checking on user arguments.
688 (flet ((check-component-validity (name name-or-type)
689 (when (stringp name)
690 (let ((unix-directory-separator #\/))
691 (when (eq host (%pathname-host *default-pathname-defaults*))
692 (when (find unix-directory-separator name)
693 (warn "Silly argument for a unix ~A: ~S"
694 name-or-type name)))))))
695 (check-component-validity name :pathname-name)
696 (check-component-validity type :pathname-type))
697
698 (macrolet ((pick (var varp field)
699 `(cond ((or (simple-string-p ,var)
700 (pattern-p ,var))
701 (maybe-diddle-case ,var diddle-args))
702 ((stringp ,var)
703 (maybe-diddle-case (coerce ,var 'simple-string)
704 diddle-args))
705 (,varp
706 (maybe-diddle-case ,var diddle-args))
707 (defaults
708 (maybe-diddle-case (,field defaults)
709 diddle-defaults))
710 (t
711 nil))))
712 (%make-pathname-object host
713 dev ; forced to :unspecific when logical-host
714 dir
715 (pick name namep %pathname-name)
716 (pick type typep %pathname-type)
717 ver))))
718
719 ;;; PATHNAME-HOST -- Interface
720 ;;;
721 (defun pathname-host (pathname &key (case :local))
722 "Accessor for the pathname's host."
723 (declare (type path-designator pathname)
724 (type (member :local :common) case)
725 (values (or string null))
726 (ignore case))
727 (host-namestring pathname))
728
729 ;;; PATHNAME-DEVICE -- Interface
730 ;;;
731 (defun pathname-device (pathname &key (case :local))
732 "Accessor for pathname's device."
733 (declare (type path-designator pathname)
734 (type (member :local :common) case))
735 (with-pathname (pathname pathname)
736 (maybe-diddle-case (%pathname-device pathname)
737 (and (eq case :common)
738 (eq (host-customary-case
739 (%pathname-host pathname))
740 :lower)))))
741
742 ;;; PATHNAME-DIRECTORY -- Interface
743 ;;;
744 (defun pathname-directory (pathname &key (case :local))
745 "Accessor for the pathname's directory list."
746 (declare (type path-designator pathname)
747 (type (member :local :common) case))
748 (with-pathname (pathname pathname)
749 (maybe-diddle-case (%pathname-directory pathname)
750 (and (eq case :common)
751 (eq (host-customary-case
752 (%pathname-host pathname))
753 :lower)))))
754 ;;; PATHNAME-NAME -- Interface
755 ;;;
756 (defun pathname-name (pathname &key (case :local))
757 "Accessor for the pathname's name."
758 (declare (type path-designator pathname)
759 (type (member :local :common) case))
760 (with-pathname (pathname pathname)
761 (maybe-diddle-case (%pathname-name pathname)
762 (and (eq case :common)
763 (eq (host-customary-case
764 (%pathname-host pathname))
765 :lower)))))
766
767 ;;; PATHNAME-TYPE
768 ;;;
769 (defun pathname-type (pathname &key (case :local))
770 "Accessor for the pathname's name."
771 (declare (type path-designator pathname)
772 (type (member :local :common) case))
773 (with-pathname (pathname pathname)
774 (maybe-diddle-case (%pathname-type pathname)
775 (and (eq case :common)
776 (eq (host-customary-case
777 (%pathname-host pathname))
778 :lower)))))
779
780 ;;; PATHNAME-VERSION
781 ;;;
782 (defun pathname-version (pathname)
783 "Accessor for the pathname's version."
784 (declare (type path-designator pathname))
785 (with-pathname (pathname pathname)
786 (%pathname-version pathname)))
787
788
789 ;;;; Namestrings
790
791 ;;; %PRINT-NAMESTRING-PARSE-ERROR -- Internal
792 ;;;
793 (defun %print-namestring-parse-error (condition stream)
794 (format stream "Parse error in namestring: ~?~% ~A~% ~V@T^"
795 (namestring-parse-error-complaint condition)
796 (namestring-parse-error-arguments condition)
797 (namestring-parse-error-namestring condition)
798 (namestring-parse-error-offset condition)))
799
800 (define-condition namestring-parse-error (parse-error)
801 ((complaint :reader namestring-parse-error-complaint :initarg :complaint)
802 (arguments :reader namestring-parse-error-arguments :initarg :arguments
803 :initform nil)
804 (namestring :reader namestring-parse-error-namestring :initarg :namestring)
805 (offset :reader namestring-parse-error-offset :initarg :offset))
806 (:report %print-namestring-parse-error))
807
808
809 ;;; %PARSE-NAMESTRING -- Internal
810 ;;;
811 ;;; Handle the case where parse-namestring is actually parsing a namestring.
812 ;;; We pick off the :JUNK-ALLOWED case then find a host to use for parsing,
813 ;;; call the parser, then check if the host matches.
814 ;;;
815 (defun %parse-namestring (namestr host defaults start end junk-allowed)
816 (declare (type string namestr)
817 (type (or host string null) host)
818 (type pathname defaults)
819 (type index start)
820 (type (or index null) end))
821 (if junk-allowed
822 (handler-case
823 (%parse-namestring namestr host defaults start end nil)
824 (namestring-parse-error (condition)
825 (values nil (namestring-parse-error-offset condition))))
826 (let* ((end (or end (length namestr)))
827 (host (if (and host (stringp host))
828 (find-logical-host host)
829 host))
830 (default-host (%pathname-host defaults))
831 (parse-host (or host
832 (extract-logical-host-prefix namestr start end)
833 default-host)))
834 (unless parse-host
835 (error "When Host arg is not supplied, Defaults arg must ~
836 have a non-null PATHNAME-HOST."))
837
838 (multiple-value-bind
839 (new-host device directory file type version)
840 (funcall (host-parse parse-host) namestr start end)
841 (when (and host new-host (not (eq new-host host)))
842 (error "Host in namestring: ~S~@
843 does not match explicit host argument: ~S"
844 namestr host))
845 (let ((pn-host (or new-host parse-host)))
846 (values (%make-pathname-object
847 pn-host device directory file type version)
848 end))))))
849
850
851 ;;; EXTRACT-LOGICAL-HOST-PREFIX -- Internal
852 ;;;
853 ;;; If namestr begins with a colon-terminated, defined, logical host, then
854 ;;; return that host, otherwise return NIL.
855 ;;;
856 (defun extract-logical-host-prefix (namestr start end)
857 (declare (type simple-base-string namestr)
858 (type index start end)
859 (values (or logical-host null)))
860 (let ((colon-pos (position #\: namestr :start start :end end)))
861 (if colon-pos
862 (find-logical-host (nstring-upcase (subseq namestr start colon-pos))
863 nil)
864 nil)))
865
866 ;;; PARSE-NAMESTRING -- Interface
867 ;;;
868 (defun parse-namestring (thing
869 &optional host (defaults *default-pathname-defaults*)
870 &key (start 0) end junk-allowed)
871 "Converts pathname, a pathname designator, into a pathname structure,
872 for a physical pathname, returns the printed representation. Host may be
873 a physical host structure or host namestring."
874 (declare (type path-designator thing)
875 (type (or list string host (member :unspecific)) host)
876 (type pathname defaults)
877 (type index start)
878 (type (or index null) end))
879 ;; Generally, redundant specification of information in software,
880 ;; whether in code or in comments, is bad. However, the ANSI spec
881 ;; for this is messy enough that it's hard to hold in short-term
882 ;; memory, so I've recorded these redundant notes on the
883 ;; implications of the ANSI spec.
884 ;;
885 ;; According to the ANSI spec, HOST can be a valid pathname host, or
886 ;; a logical host, or NIL.
887 ;;
888 ;; A valid pathname host can be a valid physical pathname host or a
889 ;; valid logical pathname host.
890 ;;
891 ;; A valid physical pathname host is "any of a string, a list of
892 ;; strings, or the symbol :UNSPECIFIC, that is recognized by the
893 ;; implementation as the name of a host". In SBCL as of 0.6.9.8,
894 ;; that means :UNSPECIFIC: though someday we might want to
895 ;; generalize it to allow strings like "RTFM.MIT.EDU" or lists like
896 ;; '("RTFM" "MIT" "EDU"), that's not supported now.
897 ;;
898 ;; A valid logical pathname host is a string which has been defined as
899 ;; the name of a logical host, as with LOAD-LOGICAL-PATHNAME-TRANSLATIONS.
900 ;;
901 (let ((host (etypecase host
902 ((string 0)
903 ;; This is a special host. It's not valid as a
904 ;; logical host, so it is a sensible thing to
905 ;; designate the physical Unix host object. So
906 ;; we do that.
907 *unix-host*)
908 (string
909 ;; In general ANSI-compliant Common Lisps, a
910 ;; string might also be a physical pathname host,
911 ;; but ANSI leaves this up to the implementor,
912 ;; and in CMUCL we don't do it, so it must be a
913 ;; logical host.
914 (find-logical-host host))
915 ((or null (member :unspecific))
916 ;; CLHS says that HOST=:UNSPECIFIC has
917 ;; implementation-defined behavior. We
918 ;; just turn it into NIL.
919 nil)
920 (list
921 ;; ANSI also allows LISTs to designate hosts,
922 ;; but leaves its interpretation
923 ;; implementation-defined. Our interpretation
924 ;; is that it's unsupported.:-|
925 (error "A LIST representing a pathname host is not ~
926 supported in this implementation:~% ~S"
927 host))
928 (host
929 host))))
930 (declare (type (or null host) host))
931 (etypecase thing
932 (simple-string
933 (%parse-namestring thing host defaults start end junk-allowed))
934 (string
935 (%parse-namestring (coerce thing 'simple-string)
936 host defaults start end junk-allowed))
937 (pathname
938 (let ((host (if host host (%pathname-host defaults))))
939 (unless (eq host (%pathname-host thing))
940 (error "Hosts do not match: ~S and ~S."
941 host (%pathname-host thing))))
942 (values thing start))
943 (stream
944 (let ((name (file-name thing)))
945 (unless name
946 (error "Can't figure out the file associated with stream:~% ~S"
947 thing))
948 (values name nil))))))
949
950
951 ;;; NAMESTRING -- Interface
952 ;;;
953 (defun namestring (pathname)
954 "Construct the full (name)string form of the pathname."
955 (declare (type path-designator pathname)
956 (values (or null simple-base-string)))
957 (with-pathname (pathname pathname)
958 (when pathname
959 (let ((host (%pathname-host pathname)))
960 (unless host
961 (error "Cannot determine the namestring for pathnames with no ~
962 host:~% ~S" pathname))
963 (funcall (host-unparse host) pathname)))))
964
965
966 ;;; HOST-NAMESTRING -- Interface
967 ;;;
968 (defun host-namestring (pathname)
969 "Returns a string representation of the name of the host in the pathname."
970 (declare (type path-designator pathname)
971 (values (or null simple-base-string)))
972 (with-pathname (pathname pathname)
973 (let ((host (%pathname-host pathname)))
974 (if host
975 (funcall (host-unparse-host host) pathname)
976 (error
977 "Cannot determine the namestring for pathnames with no host:~% ~S"
978 pathname)))))
979
980 ;;; DIRECTORY-NAMESTRING -- Interface
981 ;;;
982 (defun directory-namestring (pathname)
983 "Returns a string representation of the directories used in the pathname."
984 (declare (type path-designator pathname)
985 (values (or null simple-base-string)))
986 (with-pathname (pathname pathname)
987 (let ((host (%pathname-host pathname)))
988 (if host
989 (funcall (host-unparse-directory host) pathname)
990 (error
991 "Cannot determine the namestring for pathnames with no host:~% ~S"
992 pathname)))))
993
994 ;;; FILE-NAMESTRING -- Interface
995 ;;;
996 (defun file-namestring (pathname)
997 "Returns a string representation of the name used in the pathname."
998 (declare (type path-designator pathname)
999 (values (or null simple-base-string)))
1000 (with-pathname (pathname pathname)
1001 (let ((host (%pathname-host pathname)))
1002 (if host
1003 (funcall (host-unparse-file host) pathname)
1004 (error
1005 "Cannot determine the namestring for pathnames with no host:~% ~S"
1006 pathname)))))
1007
1008 ;;; ENOUGH-NAMESTRING -- Interface
1009 ;;;
1010 (defun enough-namestring (pathname
1011 &optional (defaults *default-pathname-defaults*))
1012 "Returns an abbreviated pathname sufficent to identify the pathname relative
1013 to the defaults."
1014 (declare (type path-designator pathname))
1015 (with-pathname (pathname pathname)
1016 (let ((host (%pathname-host pathname)))
1017 (if host
1018 (with-pathname (defaults defaults)
1019 (funcall (host-unparse-enough host) pathname defaults))
1020 (error
1021 "Cannot determine the namestring for pathnames with no host:~% ~S"
1022 pathname)))))
1023
1024
1025 ;;;; Wild pathnames.
1026
1027 ;;; WILD-PATHNAME-P -- Interface
1028 ;;;
1029 (defun wild-pathname-p (pathname &optional field-key)
1030 "Predicate for determining whether pathname contains any wildcards."
1031 (declare (type path-designator pathname)
1032 (type (member nil :host :device :directory :name :type :version)
1033 field-key))
1034 (with-pathname (pathname pathname)
1035 (flet ((frob (x)
1036 (or (pattern-p x) (member x '(:wild :wild-inferiors)))))
1037 (ecase field-key
1038 ((nil)
1039 (or (wild-pathname-p pathname :host)
1040 (wild-pathname-p pathname :device)
1041 (wild-pathname-p pathname :directory)
1042 (wild-pathname-p pathname :name)
1043 (wild-pathname-p pathname :type)
1044 (wild-pathname-p pathname :version)))
1045 (:host (frob (%pathname-host pathname)))
1046 (:device (frob (%pathname-device pathname)))
1047 (:directory (some #'frob (%pathname-directory pathname)))
1048 (:name (frob (%pathname-name pathname)))
1049 (:type (frob (%pathname-type pathname)))
1050 (:version (frob (%pathname-version pathname)))))))
1051
1052
1053 ;;; PATHNAME-MATCH-P -- Interface
1054 ;;;
1055 (defun pathname-match-p (in-pathname in-wildname)
1056 "Pathname matches the wildname template?"
1057 (declare (type path-designator in-pathname))
1058 (with-pathname (pathname in-pathname)
1059 (with-pathname (wildname in-wildname)
1060 (macrolet ((frob (field &optional (op 'components-match ))
1061 `(or (null (,field wildname))
1062 (,op (,field pathname) (,field wildname)))))
1063 (and (or (null (%pathname-host wildname))
1064 (eq (%pathname-host wildname) (%pathname-host pathname)))
1065 (frob %pathname-device)
1066 (frob %pathname-directory directory-components-match)
1067 (frob %pathname-name)
1068 (frob %pathname-type)
1069 (frob %pathname-version))))))
1070
1071
1072 ;;; SUBSTITUTE-INTO -- Internal
1073 ;;;
1074 ;;; Place the substitutions into the pattern and return the string or pattern
1075 ;;; that results. If DIDDLE-CASE is true, we diddle the result case as well,
1076 ;;; in case we are translating between hosts with difference conventional case.
1077 ;;; The second value is the tail of subs with all of the values that we used up
1078 ;;; stripped off. Note that PATTERN-MATCHES matches all consecutive wildcards
1079 ;;; as a single string, so we ignore subsequent contiguous wildcards.
1080 ;;;
1081 (defun substitute-into (pattern subs diddle-case)
1082 (declare (type pattern pattern)
1083 (type list subs)
1084 (values (or simple-base-string pattern) list))
1085 (let ((in-wildcard nil)
1086 (pieces nil)
1087 (strings nil))
1088 (dolist (piece (pattern-pieces pattern))
1089 (cond ((simple-string-p piece)
1090 (push piece strings)
1091 (setf in-wildcard nil))
1092 (in-wildcard)
1093 (t
1094 (setf in-wildcard t)
1095 (unless subs
1096 (error "Not enough wildcards in FROM pattern to match ~
1097 TO pattern:~% ~S"
1098 pattern))
1099 (let ((sub (pop subs)))
1100 (typecase sub
1101 (pattern
1102 (when strings
1103 (push (apply #'concatenate 'simple-string
1104 (nreverse strings))
1105 pieces))
1106 (dolist (piece (pattern-pieces sub))
1107 (push piece pieces)))
1108 (simple-string
1109 (push sub strings))
1110 (t
1111 (error "Can't substitute this into the middle of a word:~
1112 ~% ~S"
1113 sub)))))))
1114
1115 (when strings
1116 (push (apply #'concatenate 'simple-string (nreverse strings))
1117 pieces))
1118 (values
1119 (maybe-diddle-case
1120 (if (and pieces (simple-string-p (car pieces)) (null (cdr pieces)))
1121 (car pieces)
1122 (make-pattern (nreverse pieces)))
1123 diddle-case)
1124 subs)))
1125
1126
1127 ;;; DIDNT-MATCH-ERROR -- Internal
1128 ;;;
1129 ;;; Called when we can't see how source and from matched.
1130 ;;;
1131 (defun didnt-match-error (source from)
1132 (error "Pathname components from Source and From args to TRANSLATE-PATHNAME~@
1133 did not match:~% ~S ~S"
1134 source from))
1135
1136
1137 ;;; TRANSLATE-COMPONENT -- Internal
1138 ;;;
1139 ;;; Do TRANSLATE-COMPONENT for all components except host and directory.
1140 ;;;
1141 (defun translate-component (source from to diddle-case)
1142 (typecase to
1143 (pattern
1144 (typecase from
1145 (pattern
1146 (typecase source
1147 (pattern
1148 (if (pattern= from source)
1149 source
1150 (didnt-match-error source from)))
1151 (simple-string
1152 (multiple-value-bind
1153 (won subs)
1154 (pattern-matches from source)
1155 (if won
1156 (values (substitute-into to subs diddle-case))
1157 (didnt-match-error source from))))
1158 (t
1159 (maybe-diddle-case source diddle-case))))
1160 ((member :wild)
1161 (values (substitute-into to (list source) diddle-case)))
1162 (t
1163 (if (components-match source from)
1164 (maybe-diddle-case source diddle-case)
1165 (didnt-match-error source from)))))
1166 ((member nil :wild)
1167 (maybe-diddle-case source diddle-case))
1168 (t
1169 (if (components-match source from)
1170 to
1171 (didnt-match-error source from)))))
1172
1173
1174 ;;; COMPUTE-DIRECTORY-SUBSTITUTIONS -- Internal
1175 ;;;
1176 ;;; Return a list of all the things that we want to substitute into the TO
1177 ;;; pattern (the things matched by from on source.) When From contains
1178 ;;; :WILD-INFERIORS, the result contains a sublist of the matched source
1179 ;;; subdirectories.
1180 ;;;
1181 (defun compute-directory-substitutions (orig-source orig-from)
1182 (let ((source orig-source)
1183 (from orig-from))
1184 (collect ((subs))
1185 (loop
1186 (unless source
1187 (unless (every #'(lambda (x) (eq x :wild-inferiors)) from)
1188 (didnt-match-error orig-source orig-from))
1189 (subs ())
1190 (return))
1191 (unless from (didnt-match-error orig-source orig-from))
1192 (let ((from-part (pop from))
1193 (source-part (pop source)))
1194 (typecase from-part
1195 (pattern
1196 (typecase source-part
1197 (pattern
1198 (if (pattern= from-part source-part)
1199 (subs source-part)
1200 (didnt-match-error orig-source orig-from)))
1201 (simple-string
1202 (multiple-value-bind
1203 (won new-subs)
1204 (pattern-matches from-part source-part)
1205 (if won
1206 (dolist (sub new-subs)
1207 (subs sub))
1208 (didnt-match-error orig-source orig-from))))
1209 (t
1210 (didnt-match-error orig-source orig-from))))
1211 ((member :wild)
1212 (subs source-part))
1213 ((member :wild-inferiors)
1214 (let ((remaining-source (cons source-part source)))
1215 (collect ((res))
1216 (loop
1217 (when (directory-components-match remaining-source from)
1218 (return))
1219 (unless remaining-source
1220 (didnt-match-error orig-source orig-from))
1221 (res (pop remaining-source)))
1222 (subs (res))
1223 (setq source remaining-source))))
1224 (simple-string
1225 (unless (and (simple-string-p source-part)
1226 (string= from-part source-part))
1227 (didnt-match-error orig-source orig-from)))
1228 (t
1229 (didnt-match-error orig-source orig-from)))))
1230 (subs))))
1231
1232
1233 ;;; TRANSLATE-DIRECTORIES -- Internal
1234 ;;;
1235 ;;; Called by TRANSLATE-PATHNAME on the directory components of its argument
1236 ;;; pathanames to produce the result directory component. If any leaves the
1237 ;;; directory NIL, we return the source directory. The :RELATIVE or :ABSOLUTE
1238 ;;; is taken from the source directory, except if TO is :ABSOLUTE, in which
1239 ;;; case the result will be :ABSOLUTE.
1240 ;;;
1241 (defun translate-directories (source from to diddle-case)
1242 (if (not (and source to from))
1243 (let ((source (mapcar #'(lambda (x) (maybe-diddle-case x diddle-case))
1244 source)))
1245 (if (null to)
1246 source
1247 (collect ((res))
1248 (res (cond ((null source) (first to))
1249 ((eq (first to) :absolute) :absolute)
1250 (t (first source))))
1251 (let ((match (rest source)))
1252 (dolist (to-part (rest to))
1253 (cond ((eq to-part :wild)
1254 (when match
1255 (res (first match))
1256 (setf match nil)))
1257 ((eq to-part :wild-inferiors)
1258 (when match
1259 (dolist (src-part match)
1260 (res src-part))
1261 (setf match nil)))
1262 (t
1263 (res to-part)))))
1264 (res))))
1265 (collect ((res))
1266 (res (if (eq (first to) :absolute)
1267 :absolute
1268 (first source)))
1269 (let ((subs-left (compute-directory-substitutions (rest source)
1270 (rest from))))
1271 (dolist (to-part (rest to))
1272 (typecase to-part
1273 ((member :wild)
1274 (assert subs-left)
1275 (let ((match (pop subs-left)))
1276 (when (listp match)
1277 (error ":WILD-INFERIORS not paired in from and to ~
1278 patterns:~% ~S ~S" from to))
1279 (res (maybe-diddle-case match diddle-case))))
1280 ((member :wild-inferiors)
1281 (assert subs-left)
1282 (let ((match (pop subs-left)))
1283 (unless (listp match)
1284 (error ":WILD-INFERIORS not paired in from and to ~
1285 patterns:~% ~S ~S" from to))
1286 (dolist (x match)
1287 (res (maybe-diddle-case x diddle-case)))))
1288 (pattern
1289 (multiple-value-bind
1290 (new new-subs-left)
1291 (substitute-into to-part subs-left diddle-case)
1292 (setf subs-left new-subs-left)
1293 (res new)))
1294 (t (res to-part)))))
1295 (res))))
1296
1297
1298 ;;; TRANSLATE-PATHNAME -- Interface
1299 ;;;
1300 (defun translate-pathname (source from-wildname to-wildname &key)
1301 "Use the source pathname to translate the from-wildname's wild and
1302 unspecified elements into a completed to-pathname based on the to-wildname."
1303 (declare (type path-designator source from-wildname to-wildname))
1304 (with-pathname (source source)
1305 (with-pathname (from from-wildname)
1306 (with-pathname (to to-wildname)
1307 (let* ((source-host (%pathname-host source))
1308 (to-host (%pathname-host to))
1309 (diddle-case
1310 (and source-host to-host
1311 (not (eq (host-customary-case source-host)
1312 (host-customary-case to-host))))))
1313 (macrolet ((frob (field &optional (op 'translate-component))
1314 `(let ((result (,op (,field source)
1315 (,field from)
1316 (,field to)
1317 diddle-case)))
1318 (if (eq result :error)
1319 (error "~S doesn't match ~S" source from)
1320 result))))
1321 (%make-pathname-object
1322 (or to-host source-host)
1323 (frob %pathname-device)
1324 (frob %pathname-directory translate-directories)
1325 (frob %pathname-name)
1326 (frob %pathname-type)
1327 (frob %pathname-version))))))))
1328
1329
1330 ;;;; Search lists.
1331
1332 ;;; The SEARCH-LIST structure.
1333 ;;;
1334 (defstruct (search-list
1335 (:print-function %print-search-list)
1336 (:make-load-form-fun
1337 (lambda (search-list)
1338 (values `(intern-search-list ',(search-list-name search-list))
1339 nil))))
1340 ;;
1341 ;; The name of this search-list. Always stored in lowercase.
1342 (name (required-argument) :type simple-string)
1343 ;;
1344 ;; T if this search-list has been defined. Otherwise NIL.
1345 (defined nil :type (member t nil))
1346 ;;
1347 ;; The list of expansions for this search-list. Each expansion is the list
1348 ;; of directory components to use in place of this search-list.
1349 (expansions nil :type list))
1350
1351 (defun %print-search-list (sl stream depth)
1352 (declare (ignore depth))
1353 (print-unreadable-object (sl stream :type t)
1354 (write-string (search-list-name sl) stream)))
1355
1356 ;;; *SEARCH-LISTS* -- internal.
1357 ;;;
1358 ;;; Hash table mapping search-list names to search-list structures.
1359 ;;;
1360 (defvar *search-lists* (make-hash-table :test #'equal))
1361
1362 ;;; FIND-SEARCH-LIST -- internal
1363 ;;;
1364 (defun find-search-list (name &optional (flame-not-found-p t))
1365 (let ((search-list (gethash (string-downcase name) *search-lists*)))
1366 (if search-list search-list
1367 (when flame-not-found-p
1368 (error "Search-list ~a not defined." name)))))
1369
1370 ;;; INTERN-SEARCH-LIST -- internal interface.
1371 ;;;
1372 ;;; When search-lists are encountered in namestrings, they are converted to
1373 ;;; search-list structures right then, instead of waiting until the search
1374 ;;; list used. This allows us to verify ahead of time that there are no
1375 ;;; circularities and makes expansion much quicker.
1376 ;;;
1377 (defun intern-search-list (name)
1378 (let ((name (string-downcase name)))
1379 (or (gethash name *search-lists*)
1380 (let ((new (make-search-list :name name)))
1381 (setf (gethash name *search-lists*) new)
1382 new))))
1383
1384 ;;; CLEAR-SEARCH-LIST -- public.
1385 ;;;
1386 ;;; Clear the definition. Note: we can't remove it from the hash-table
1387 ;;; because there may be pathnames still refering to it. So we just clear
1388 ;;; out the expansions and set defined to NIL.
1389 ;;;
1390 (defun clear-search-list (name)
1391 "Clear the current definition for the search-list NAME. Returns T if such
1392 a definition existed, and NIL if not."
1393 (let* ((name (string-downcase name))
1394 (search-list (gethash name *search-lists*)))
1395 (when (and search-list (search-list-defined search-list))
1396 (setf (search-list-defined search-list) nil)
1397 (setf (search-list-expansions search-list) nil)
1398 t)))
1399
1400 ;;; CLEAR-ALL-SEARCH-LISTS -- sorta public.
1401 ;;;
1402 ;;; Again, we can't actually remove the entries from the hash-table, so we
1403 ;;; just mark them as being undefined.
1404 ;;;
1405 (defun clear-all-search-lists ()
1406 "Clear the definition for all search-lists. Only use this if you know
1407 what you are doing."
1408 (maphash #'(lambda (name search-list)
1409 (declare (ignore name))
1410 (setf (search-list-defined search-list) nil)
1411 (setf (search-list-expansions search-list) nil))
1412 *search-lists*)
1413 nil)
1414
1415 ;;; EXTRACT-SEARCH-LIST -- internal.
1416 ;;;
1417 ;;; Extract the search-list from PATHNAME and return it. If PATHNAME
1418 ;;; doesn't start with a search-list, then either error (if FLAME-IF-NONE
1419 ;;; is true) or return NIL (if FLAME-IF-NONE is false).
1420 ;;;
1421 (defun extract-search-list (pathname flame-if-none)
1422 (with-pathname (pathname pathname)
1423 (let* ((directory (%pathname-directory pathname))
1424 (search-list (cadr directory)))
1425 (cond ((search-list-p search-list)
1426 search-list)
1427 (flame-if-none
1428 (error "~S doesn't start with a search-list." pathname))
1429 (t
1430 nil)))))
1431
1432 ;;; SEARCH-LIST -- public.
1433 ;;;
1434 ;;; We have to convert the internal form of the search-list back into a
1435 ;;; bunch of pathnames.
1436 ;;;
1437 (defun search-list (pathname)
1438 "Return the expansions for the search-list starting PATHNAME. If PATHNAME
1439 does not start with a search-list, then an error is signaled. If
1440 the search-list has not been defined yet, then an error is signaled.
1441 The expansion for a search-list can be set with SETF."
1442 (with-pathname (pathname pathname)
1443 (let ((search-list (extract-search-list pathname t))
1444 (host (%pathname-host pathname)))
1445 (if (search-list-defined search-list)
1446 (mapcar #'(lambda (directory)
1447 (make-pathname :host host
1448 :directory (cons :absolute directory)))
1449 (search-list-expansions search-list))
1450 (error "Search list ~S has not been defined yet." pathname)))))
1451
1452 ;;; SEARCH-LIST-DEFINED-P -- public.
1453 ;;;
1454 (defun search-list-defined-p (pathname)
1455 "Returns T if the search-list starting PATHNAME is currently defined, and
1456 NIL otherwise. An error is signaled if PATHNAME does not start with a
1457 search-list."
1458 (with-pathname (pathname pathname)
1459 (search-list-defined (extract-search-list pathname t))))
1460
1461 ;;; %SET-SEARCH-LIST -- public setf method
1462 ;;;
1463 ;;; Set the expansion for the search-list in PATHNAME. If this would result
1464 ;;; in any circularities, we flame out. If anything goes wrong, we leave the
1465 ;;; old defintion intact.
1466 ;;;
1467 (defun %set-search-list (pathname values)
1468 (let ((search-list (extract-search-list pathname t)))
1469 (labels
1470 ((check (target-list path)
1471 (when (eq search-list target-list)
1472 (error "That would result in a circularity:~% ~
1473 ~A~{ -> ~A~} -> ~A"
1474 (search-list-name search-list)
1475 (reverse path)
1476 (search-list-name target-list)))
1477 (when (search-list-p target-list)
1478 (push (search-list-name target-list) path)
1479 (dolist (expansion (search-list-expansions target-list))
1480 (check (car expansion) path))))
1481 (convert (pathname)
1482 (with-pathname (pathname pathname)
1483 (when (or (pathname-name pathname)
1484 (pathname-type pathname)
1485 (pathname-version pathname))
1486 (error "Search-lists cannot expand into pathnames that have ~
1487 a name, type, or ~%version specified:~% ~S"
1488 pathname))
1489 (let ((directory (pathname-directory pathname)))
1490 (let ((expansion
1491 (if directory
1492 (ecase (car directory)
1493 (:absolute (cdr directory))
1494 (:relative (cons (intern-search-list "default")
1495 (cdr directory))))
1496 (list (intern-search-list "default")))))
1497 (check (car expansion) nil)
1498 expansion)))))
1499 (setf (search-list-expansions search-list)
1500 (if (listp values)
1501 (mapcar #'convert values)
1502 (list (convert values)))))
1503 (setf (search-list-defined search-list) t))
1504 values)
1505
1506 ;;; ENUMERATE-SEARCH-LIST -- public.
1507 ;;;
1508 (defmacro enumerate-search-list ((var pathname &optional result) &body body)
1509 "Execute BODY with VAR bound to each successive possible expansion for
1510 PATHNAME and then return RESULT. Note: if PATHNAME does not contain a
1511 search-list, then BODY is executed exactly once. Everything is wrapped
1512 in a block named NIL, so RETURN can be used to terminate early. Note:
1513 VAR is *not* bound inside of RESULT."
1514 (let ((body-name (gensym)))
1515 `(block nil
1516 (flet ((,body-name (,var)
1517 ,@body))
1518 (%enumerate-search-list ,pathname #',body-name)
1519 ,result))))
1520
1521 (defun %enumerate-search-list (pathname function)
1522 (let* ((pathname (if (logical-pathname-p pathname)
1523 (translate-logical-pathname pathname)
1524 pathname))
1525 (search-list (extract-search-list pathname nil)))
1526 (cond
1527 ((not search-list)
1528 (funcall function pathname))
1529 ((not (search-list-defined search-list))
1530 (error "Undefined search list: ~A"
1531 (search-list-name search-list)))
1532 (t
1533 (let ((tail (cddr (pathname-directory pathname))))
1534 (dolist (expansion
1535 (search-list-expansions search-list))
1536 (%enumerate-search-list (make-pathname :defaults pathname
1537 :directory
1538 (cons :absolute
1539 (append expansion
1540 tail)))
1541 function)))))))
1542
1543
1544 ;;;; Logical pathname support. ANSI 92-102 specification.
1545 ;;;; As logical-pathname translations are loaded they are canonicalized as
1546 ;;;; patterns to enable rapid efficent translation into physical pathnames.
1547
1548 ;;;; Utilities:
1549
1550 ;;; LOGICAL-WORD-OR-LOSE -- Internal
1551 ;;;
1552 ;;; Canonicalize a logical pathanme word by uppercasing it checking that it
1553 ;;; contains only legal characters.
1554 ;;;
1555 (defun logical-word-or-lose (word)
1556 (declare (string word))
1557 (let ((word (string-upcase word)))
1558 (dotimes (i (length word))
1559 (let ((ch (schar word i)))
1560 (unless (or (alpha-char-p ch) (digit-char-p ch) (char= ch #\-))
1561 (error 'namestring-parse-error
1562 :complaint "Logical namestring character ~
1563 is not alphanumeric or hyphen:~% ~S"
1564 :arguments (list ch)
1565 :namestring word :offset i))))
1566 word))
1567
1568
1569 ;;; FIND-LOGICAL-HOST -- Internal
1570 ;;;
1571 ;;; Given a logical host or string, return a logical host. If Error-p is
1572 ;;; NIL, then return NIL when no such host exists.
1573 ;;;
1574 (defun find-logical-host (thing &optional (errorp t))
1575 (etypecase thing
1576 (string
1577 (let* ((valid-hostname
1578 (catch 'error-bailout
1579 (handler-bind
1580 ((namestring-parse-error
1581 (lambda(c)(declare (ignore c))
1582 (unless errorp
1583 (throw 'error-bailout nil)))))
1584 (logical-word-or-lose thing))))
1585 (found
1586 (and valid-hostname
1587 (or (gethash valid-hostname *logical-hosts*)
1588 (and *autoload-translations*
1589 (ignore-errors
1590 (load-logical-pathname-translations
1591 valid-hostname))
1592 (gethash valid-hostname *logical-hosts*))))))
1593 (if (or found (not errorp))
1594 found
1595 (error 'simple-file-error
1596 :pathname thing
1597 :format-control "Logical host not yet defined: ~S"
1598 :format-arguments (list thing)))))
1599 (logical-host thing)))
1600
1601 ;;; INTERN-LOGICAL-HOST -- Internal
1602 ;;;
1603 ;;; Given a logical host name or host, return a logical host, creating a new
1604 ;;; one if necessary.
1605 ;;;
1606 (defun intern-logical-host (thing)
1607 (declare (values logical-host))
1608 (or (find-logical-host thing nil)
1609 (let* ((name (logical-word-or-lose thing))
1610 (new (make-logical-host :name name)))
1611 (setf (gethash name *logical-hosts*) new)
1612 new)))
1613
1614
1615 ;;;; Logical pathname parsing:
1616
1617 ;;; MAYBE-MAKE-LOGICAL-PATTERN -- Internal
1618 ;;;
1619 ;;; Deal with multi-char wildcards in a logical pathname token.
1620 ;;;
1621 (defun maybe-make-logical-pattern (namestring chunks)
1622 (let ((chunk (caar chunks)))
1623 (collect ((pattern))
1624 (let ((last-pos 0)
1625 (len (length chunk)))
1626 (declare (fixnum last-pos))
1627 (loop
1628 (when (= last-pos len) (return))
1629 (let ((pos (or (position #\* chunk :start last-pos) len)))
1630 (if (= pos last-pos)
1631 (when (pattern)
1632 (error 'namestring-parse-error
1633 :complaint "Double asterisk inside of logical ~
1634 word: ~S"
1635 :arguments (list chunk)
1636 :namestring namestring
1637 :offset (+ (cdar chunks) pos)))
1638 (pattern (subseq chunk last-pos pos)))
1639 (if (= pos len)
1640 (return)
1641 (pattern :multi-char-wild))
1642 (setq last-pos (1+ pos)))))
1643 (assert (pattern))
1644 (if (cdr (pattern))
1645 (make-pattern (pattern))
1646 (let ((x (car (pattern))))
1647 (if (eq x :multi-char-wild)
1648 :wild
1649 x))))))
1650
1651
1652 ;;; LOGICAL-CHUNKIFY -- Internal
1653 ;;;
1654 ;;; Return a list of conses where the cdr is the start position and the car
1655 ;;; is a string (token) or character (punctuation.)
1656 ;;;
1657 (defun logical-chunkify (namestr start end)
1658 (collect ((chunks))
1659 (do ((i start (1+ i))
1660 (prev 0))
1661 ((= i end)
1662 (when (> end prev)
1663 (chunks (cons (nstring-upcase (subseq namestr prev end)) prev))))
1664 (let ((ch (schar namestr i)))
1665 (unless (or (alpha-char-p ch) (digit-char-p ch)
1666 (member ch '(#\- #\*)))
1667 (when (> i prev)
1668 (chunks (cons (nstring-upcase (subseq namestr prev i)) prev)))
1669 (setq prev (1+ i))
1670 (unless (member ch '(#\; #\: #\.))
1671 (error 'namestring-parse-error
1672 :complaint "Illegal character for logical pathname:~% ~S"
1673 :arguments (list ch)
1674 :namestring namestr
1675 :offset i))
1676 (chunks (cons ch i)))))
1677 (chunks)))
1678
1679
1680 ;;; PARSE-LOGICAL-NAMESTRING -- Internal
1681 ;;;
1682 ;;; Break up a logical-namestring, always a string, into its constituent
1683 ;;; parts.
1684 ;;;
1685 (defun parse-logical-namestring (namestr start end)
1686 (declare (type simple-base-string namestr)
1687 (type index start end))
1688 (collect ((directory))
1689 (let ((host nil)
1690 (name nil)
1691 (type nil)
1692 (version nil))
1693 (labels ((expecting (what chunks)
1694 (unless (and chunks (simple-string-p (caar chunks)))
1695 (error 'namestring-parse-error
1696 :complaint "Expecting ~A, got ~:[nothing~;~:*~S~]."
1697 :arguments (list what (caar chunks))
1698 :namestring namestr
1699 :offset (if chunks (cdar chunks) end)))
1700 (caar chunks))
1701 (parse-host (chunks)
1702 (case (caadr chunks)
1703 (#\:
1704 (setq host
1705 (find-logical-host (expecting "a host name" chunks)))
1706 (parse-relative (cddr chunks)))
1707 (t
1708 (parse-relative chunks))))
1709 (parse-relative (chunks)
1710 (case (caar chunks)
1711 (#\;
1712 (directory :relative)
1713 (parse-directory (cdr chunks)))
1714 (t
1715 (directory :absolute) ; Assumption! Maybe revoked later.
1716 (parse-directory chunks))))
1717 (parse-directory (chunks)
1718 (case (caadr chunks)
1719 (#\;
1720 (directory
1721 (let ((res (expecting "a directory name" chunks)))
1722 (cond ((string= res "..") :up)
1723 ((string= res "**") :wild-inferiors)
1724 (t
1725 (maybe-make-logical-pattern namestr chunks)))))
1726 (parse-directory (cddr chunks)))
1727 (t
1728 (parse-name chunks))))
1729 (parse-name (chunks)
1730 (when chunks
1731 (expecting "a file name" chunks)
1732 (setq name (maybe-make-logical-pattern namestr chunks))
1733 (expecting-dot (cdr chunks))))
1734 (expecting-dot (chunks)
1735 (when chunks
1736 (unless (eql (caar chunks) #\.)
1737 (error 'namestring-parse-error
1738 :complaint "Expecting a dot, got ~S."
1739 :arguments (list (caar chunks))
1740 :namestring namestr
1741 :offset (cdar chunks)))
1742 (if type
1743 (parse-version (cdr chunks))
1744 (parse-type (cdr chunks)))))
1745 (parse-type (chunks)
1746 (expecting "a file type" chunks)
1747 (setq type (maybe-make-logical-pattern namestr chunks))
1748 (expecting-dot (cdr chunks)))
1749 (parse-version (chunks)
1750 (let ((str (expecting "a positive integer, * or NEWEST"
1751 chunks)))
1752 (cond
1753 ((string= str "*") (setq version :wild))
1754 ((string= str "NEWEST") (setq version :newest))
1755 (t
1756 (multiple-value-bind
1757 (res pos)
1758 (parse-integer str :junk-allowed t)
1759 (unless (and res (plusp res))
1760 (error 'namestring-parse-error
1761 :complaint "Expected a positive integer, ~
1762 got ~S"
1763 :arguments (list str)
1764 :namestring namestr
1765 :offset (+ pos (cdar chunks))))
1766 (setq version res)))))
1767 (when (cdr chunks)
1768 (error 'namestring-parse-error
1769 :complaint "Extra stuff after end of file name."
1770 :namestring namestr
1771 :offset (cdadr chunks)))))
1772 (parse-host (logical-chunkify namestr start end)))
1773 (values host :unspecific
1774 (directory)
1775 name type version))))
1776
1777
1778 ;;; Can't defvar here because not all host methods are loaded yet.
1779 (declaim (special *logical-pathname-defaults*))
1780
1781 ;;; LOGICAL-PATHNAME -- Public
1782 ;;;
1783 (defun logical-pathname (pathspec)
1784 "Converts the pathspec argument to a logical-pathname and returns it."
1785 (declare (type (or logical-pathname string stream) pathspec)
1786 (values logical-pathname))
1787 (if (typep pathspec 'logical-pathname)
1788 pathspec
1789 (let ((res (parse-namestring pathspec nil *logical-pathname-defaults*)))
1790 (when (eq (%pathname-host res)
1791 (%pathname-host *logical-pathname-defaults*))
1792 (error
1793 'simple-type-error
1794 :format-control "Logical namestring does not specify a host:~% ~S"
1795 :format-arguments (list pathspec)
1796 :datum pathspec
1797 :expected-type '(satisfies logical-pathname-namestring-p)))
1798 res)))
1799
1800
1801
1802 ;;;; Logical pathname unparsing:
1803
1804 ;;; UNPARSE-LOGICAL-DIRECTORY -- Internal
1805 ;;;
1806 (defun unparse-logical-directory (pathname)
1807 (declare (type pathname pathname))
1808 (collect ((pieces))
1809 (let ((directory (%pathname-directory pathname)))
1810 (when directory
1811 (ecase (pop directory)
1812 (:absolute) ;; Nothing special.
1813 (:relative (pieces ";")))
1814 (dolist (dir directory)
1815 (cond ((or (stringp dir) (pattern-p dir))
1816 (pieces (unparse-logical-piece dir))
1817 (pieces ";"))
1818 ((eq dir :wild)
1819 (pieces "*;"))
1820 ((eq dir :wild-inferiors)
1821 (pieces "**;"))
1822 (t
1823 (error "Invalid directory component: ~S" dir))))))
1824 (apply #'concatenate 'simple-string (pieces))))
1825
1826
1827 ;;; UNPARSE-LOGICAL-PIECE -- Internal
1828 ;;;
1829 (defun unparse-logical-piece (thing)
1830 (etypecase thing
1831 (simple-string thing)
1832 (pattern
1833 (collect ((strings))
1834 (dolist (piece (pattern-pieces thing))
1835 (etypecase piece
1836 (simple-string (strings piece))
1837 (keyword
1838 (cond ((eq piece :wild-inferiors)
1839 (strings "**"))
1840 ((eq piece :multi-char-wild)
1841 (strings "*"))
1842 (t (error "Invalid keyword: ~S" piece))))))
1843 (apply #'concatenate 'simple-string (strings))))))
1844
1845 ;;; UNPARSE-ENOUGH-NAMESTRING -- Internal
1846 ;;;
1847 (defun unparse-enough-namestring (pathname defaults)
1848 (let* ((path-dir (pathname-directory pathname))
1849 (def-dir (pathname-directory defaults))
1850 (enough-dir
1851 ;; Go down the directory lists to see what matches. What's
1852 ;; left is what we want, more or less.
1853 (cond ((and (eq (first path-dir) (first def-dir))
1854 (eq (first path-dir) :absolute))
1855 ;; Both paths are :absolute, so find where the common
1856 ;; parts end and return what's left
1857 (do* ((p (rest path-dir) (rest p))
1858 (d (rest def-dir) (rest d)))
1859 ((or (endp p) (endp d)
1860 (not (equal (first p) (first d))))
1861 `(:relative ,@p))))
1862 (t
1863 ;; At least one path is :relative, so just return the
1864 ;; original path. If the original path is :relative,
1865 ;; then that's the right one. If PATH-DIR is
1866 ;; :absolute, we want to return that except when
1867 ;; DEF-DIR is :absolute, as handled above. so return
1868 ;; the original directory.
1869 path-dir))))
1870 (make-pathname :host (%pathname-host pathname)
1871 :directory enough-dir
1872 :name (pathname-name pathname)
1873 :type (pathname-type pathname)
1874 :version (pathname-version pathname))))
1875
1876 ;;; UNPARSE-LOGICAL-NAMESTRING -- Internal
1877 ;;;
1878 (defun unparse-logical-namestring (pathname)
1879 (declare (type logical-pathname pathname))
1880 (concatenate 'simple-string
1881 (logical-host-name (%pathname-host pathname)) ":"
1882 (unparse-logical-directory pathname)
1883 (unparse-unix-file pathname)))
1884
1885
1886 ;;;; Logical pathname translations:
1887
1888 ;;; CANONICALIZE-LOGICAL-PATHNAME-TRANSLATIONS -- Internal
1889 ;;;
1890 ;;; Verify that the list of translations consists of lists and prepare
1891 ;;; canonical translations (parse pathnames and expand out wildcards into
1892 ;;; patterns).
1893 ;;;
1894 (defun canonicalize-logical-pathname-translations (transl-list host)
1895 (declare (type list transl-list) (type host host)
1896 (values list))
1897 (collect ((res))
1898 (dolist (tr transl-list)
1899 (unless (and (consp tr) (= (length tr) 2))
1900 (error "Logical pathname translation is not a two-list:~% ~S"
1901 tr))
1902 (let ((from (first tr)))
1903 (res (list (if (typep from 'logical-pathname)
1904 from
1905 (parse-namestring from host))
1906 (pathname (second tr))))))
1907 (res)))
1908
1909
1910 ;;; LOGICAL-PATHNAME-TRANSLATIONS -- Public
1911 ;;;
1912 (defun logical-pathname-translations (host)
1913 "Return the (logical) host object argument's list of translations."
1914 (declare (type (or string logical-host) host)
1915 (values list))
1916 (logical-host-translations (find-logical-host host)))
1917
1918 ;;; (SETF LOGICAL-PATHNAME-TRANSLATIONS) -- Public
1919 ;;;
1920 (defun (setf logical-pathname-translations) (translations host)
1921 "Set the translations list for the logical host argument.
1922 Return translations."
1923 (declare (type (or string logical-host) host)
1924 (type list translations)
1925 (values list))
1926
1927 (let ((host (intern-logical-host host)))
1928 (setf (logical-host-canon-transls host)
1929 (canonicalize-logical-pathname-translations translations host))
1930 (setf (logical-host-translations host) translations)))
1931
1932
1933 ;;; The search mechanism for loading pathname translations uses the CMUCL
1934 ;;; extension of search-lists. The user can add to the library: search-list
1935 ;;; using setf. The file for translations should have the name defined by
1936 ;;; the hostname (a string) and with type component "translations".
1937
1938 ;;; LOAD-LOGICAL-PATHNAME-TRANSLATIONS -- Public
1939 ;;;
1940 (defun load-logical-pathname-translations (host)
1941 "Search for a logical pathname named host, if not already defined. If already
1942 defined no attempt to find or load a definition is attempted and NIL is
1943 returned. If host is not already defined, but definition is found and loaded
1944 successfully, T is returned, else error."
1945 (declare (type string host)
1946 (values (member t nil)))
1947 (let ((*autoload-translations* nil))
1948 (unless (or (string-equal host "library")
1949 (find-logical-host host nil))
1950 (with-open-file (in-str (make-pathname :defaults "library:"
1951 :name (string-downcase host)
1952 :type "translations"))
1953 (if *load-verbose*
1954 (format *error-output*
1955 ";; Loading pathname translations from ~A~%"
1956 (namestring (truename in-str))))
1957 (setf (logical-pathname-translations host) (read in-str)))
1958 t)))
1959
1960 ;;; TRANSLATE-LOGICAL-PATHNAME -- Public
1961 ;;;
1962 (defun translate-logical-pathname (pathname &key)
1963 "Translates pathname to a physical pathname, which is returned."
1964 (declare (type path-designator pathname)
1965 (values (or null pathname)))
1966 (typecase pathname
1967 (logical-pathname
1968 (dolist (x (logical-host-canon-transls (%pathname-host pathname))
1969 (error 'simple-file-error
1970 :pathname pathname
1971 :format-control "No translation for ~S"
1972 :format-arguments (list pathname)))
1973 (destructuring-bind (from to) x
1974 (when (pathname-match-p pathname from)
1975 (return (translate-logical-pathname
1976 (translate-pathname pathname from to)))))))
1977 (pathname pathname)
1978 (stream (translate-logical-pathname (pathname pathname)))
1979 (t (translate-logical-pathname (pathname pathname)))))
1980
1981 (defvar *logical-pathname-defaults*
1982 (%make-logical-pathname (make-logical-host :name "BOGUS") :unspecific
1983 nil nil nil nil))

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