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Revision 1.39 - (hide annotations)
Mon Apr 12 12:33:18 1999 UTC (15 years ago) by dtc
Branch: MAIN
Changes since 1.38: +7 -3 lines
Fix for %print-pathname to respect *print-escape*, from Sam Steingold.
Likewise in %print-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     ;;;
6     (ext:file-comment
7 dtc 1.39 "$Header: /tiger/var/lib/cvsroots/cmucl/src/code/pathname.lisp,v 1.39 1999/04/12 12:33:18 dtc Exp $")
8 wlott 1.1 ;;;
9     ;;; **********************************************************************
10     ;;;
11     ;;; Machine/filesystem independent pathname functions for CMU Common Lisp.
12     ;;;
13 ram 1.17 ;;; Written by William Lott, Paul Gleichauf and Rob MacLachlan.
14 wlott 1.1 ;;; Earlier version written by Jim Large and Rob MacLachlan
15     ;;;
16     ;;; **********************************************************************
17    
18     (in-package "LISP")
19    
20     (export '(pathname pathnamep logical-pathname logical-pathname-p
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 wlott 1.9 (export '(search-list search-list-defined-p clear-search-list
31     enumerate-search-list))
32 wlott 1.1
33     (in-package "LISP")
34    
35    
36 phg 1.16 ;;;; HOST structures
37 wlott 1.1
38 phg 1.16 ;;; The host structure holds the functions that both parse the pathname
39     ;;; information into sturcture slot entries, and after translation the inverse
40     ;;; (unparse) functions.
41     ;;;
42     (defstruct (host
43     (:print-function %print-host))
44     (parse (required-argument) :type function)
45     (unparse (required-argument) :type function)
46     (unparse-host (required-argument) :type function)
47     (unparse-directory (required-argument) :type function)
48     (unparse-file (required-argument) :type function)
49     (unparse-enough (required-argument) :type function)
50     (customary-case (required-argument) :type (member :upper :lower)))
51 phg 1.13
52 phg 1.16 ;;; %PRINT-HOST -- Internal
53     ;;;
54     (defun %print-host (host stream depth)
55     (declare (ignore depth))
56     (print-unreadable-object (host stream :type t :identity t)))
57    
58     (defstruct (logical-host
59     (:include host
60     (:parse #'parse-logical-namestring)
61     (:unparse #'unparse-logical-namestring)
62 ram 1.17 (:unparse-host
63     #'(lambda (x) (logical-host-name (%pathname-host x))))
64 phg 1.16 (:unparse-directory #'unparse-logical-directory)
65 ram 1.17 (:unparse-file #'unparse-unix-file)
66 dtc 1.36 (:unparse-enough #'unparse-enough-namestring)
67 phg 1.16 (:customary-case :upper)))
68     (name "" :type simple-base-string)
69     (translations nil :type list)
70     (canon-transls nil :type list))
71    
72 ram 1.17 ;;; The various magic tokens that are allowed to appear in pretty much all
73     ;;; pathname components.
74     ;;;
75     (deftype component-tokens ()
76     '(member nil :unspecific :wild))
77    
78 phg 1.16 ;;;; Pathname structures
79    
80 wlott 1.1 (defstruct (pathname
81     (:conc-name %pathname-)
82     (:print-function %print-pathname)
83     (:constructor
84     %make-pathname (host device directory name type version))
85     (:predicate pathnamep)
86     (:make-load-form-fun :just-dump-it-normally))
87 phg 1.13 ;; Slot holds the host, at present either a UNIX or logical host.
88 wlott 1.1 (host nil :type (or host null))
89 phg 1.13 ;; Device is the name of a logical or physical device holding files.
90 dtc 1.32 (device nil :type (or simple-string component-tokens))
91 phg 1.13 ;; A list of strings that are the component subdirectory components.
92 wlott 1.1 (directory nil :type list)
93 phg 1.13 ;; The filename.
94 ram 1.17 (name nil :type (or simple-string pattern component-tokens))
95 phg 1.13 ;; The type extension of the file.
96 ram 1.17 (type nil :type (or simple-string pattern component-tokens))
97 phg 1.13 ;; The version number of the file, a positive integer, but not supported
98     ;; on standard UNIX filesystems.
99 ram 1.17 (version nil :type (or integer component-tokens (member :newest))))
100 wlott 1.1
101 phg 1.13 ;;; %PRINT-PATHNAME -- Internal
102     ;;;
103     ;;; The printed representation of the pathname structure.
104     ;;;
105 wlott 1.1 (defun %print-pathname (pathname stream depth)
106     (declare (ignore depth))
107     (let ((namestring (handler-case (namestring pathname)
108     (error nil))))
109     (cond (namestring
110 dtc 1.39 (if (or *print-escape* *print-readably*)
111     (format stream "#p~S" namestring)
112     (format stream "~A" namestring)))
113 wlott 1.1 (*print-readably*
114     (error "~S Cannot be printed readably." pathname))
115     (t
116     (funcall (formatter "#<Unprintable pathname, Host=~S, Device=~S, ~
117 pw 1.28 Directory=~S, Name=~S, Type=~S, Version=~S>")
118 wlott 1.1 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 dtc 1.39 (if (or *print-escape* *print-readably*)
171     (format stream "#.(logical-pathname ~S)" namestring)
172     (format stream "~A" namestring)))
173 phg 1.16 (*print-readably*
174     (error "~S Cannot be printed readably." pathname))
175     (t
176     (funcall (formatter "#<Unprintable pathname, Host=~S, ~
177     Directory=~S, File=~S, Name=~S, Version=~S>")
178     stream
179     (%pathname-host pathname)
180     (%pathname-directory pathname)
181     (%pathname-name pathname)
182     (%pathname-type pathname)
183     (%pathname-version pathname))))))
184 wlott 1.1
185 pw 1.28 ;;; %MAKE-PATHNAME-OBJECT -- internal
186     ;;;
187     ;;; A pathname is logical if the host component is a logical-host.
188     ;;; This constructor is used to make an instance of the correct type
189     ;;; from parsed arguments.
190    
191     (defun %make-pathname-object (host device directory name type version)
192     (if (typep host 'logical-host)
193     (%make-logical-pathname host :unspecific directory name type version)
194     (%make-pathname host device directory name type version)))
195    
196 phg 1.16 ;;; *LOGICAL-HOSTS* --internal.
197     ;;;
198     ;;; Hash table searching maps a logical-pathname's host to their physical
199     ;;; pathname translation.
200    
201     (defvar *logical-hosts* (make-hash-table :test #'equal))
202    
203 ram 1.17 ;;; PATH-DESIGNATOR -- internal type
204 phg 1.16 ;;;
205     (deftype path-designator ()
206     "A path specification, either a string, stream or pathname."
207 ram 1.17 '(or string stream pathname))
208 phg 1.16
209 wlott 1.1
210     ;;;; Patterns
211    
212 phg 1.13 ;;; Patterns are a list of entries and wildcards used for pattern matches
213     ;;; of translations.
214    
215 wlott 1.1 (defstruct (pattern
216     (:print-function %print-pattern)
217     (:make-load-form-fun :just-dump-it-normally)
218     (:constructor make-pattern (pieces)))
219     (pieces nil :type list))
220    
221 phg 1.13 ;;; %PRINT-PATTERN -- Internal
222     ;;;
223 wlott 1.1 (defun %print-pattern (pattern stream depth)
224     (declare (ignore depth))
225     (print-unreadable-object (pattern stream :type t)
226     (if *print-pretty*
227     (let ((*print-escape* t))
228     (pprint-fill stream (pattern-pieces pattern) nil))
229     (prin1 (pattern-pieces pattern) stream))))
230    
231 phg 1.13 ;;; PATTERN= -- Internal
232     ;;;
233 wlott 1.1 (defun pattern= (pattern1 pattern2)
234     (declare (type pattern pattern1 pattern2))
235     (let ((pieces1 (pattern-pieces pattern1))
236     (pieces2 (pattern-pieces pattern2)))
237     (and (= (length pieces1) (length pieces2))
238     (every #'(lambda (piece1 piece2)
239     (typecase piece1
240     (simple-string
241     (and (simple-string-p piece2)
242     (string= piece1 piece2)))
243     (cons
244     (and (consp piece2)
245     (eq (car piece1) (car piece2))
246     (string= (cdr piece1) (cdr piece2))))
247     (t
248     (eq piece1 piece2))))
249     pieces1
250     pieces2))))
251    
252 phg 1.13 ;;; PATTERN-MATCHES -- Internal
253     ;;;
254 pw 1.30 ;;; If the string matches the pattern returns the multiple values T and a
255 phg 1.16 ;;; list of the matched strings.
256     ;;;
257 phg 1.13 (defun pattern-matches (pattern string)
258     (declare (type pattern pattern)
259     (type simple-string string))
260     (let ((len (length string)))
261     (labels ((maybe-prepend (subs cur-sub chars)
262     (if cur-sub
263     (let* ((len (length chars))
264     (new (make-string len))
265     (index len))
266     (dolist (char chars)
267     (setf (schar new (decf index)) char))
268     (cons new subs))
269     subs))
270     (matches (pieces start subs cur-sub chars)
271     (if (null pieces)
272     (if (= start len)
273     (values t (maybe-prepend subs cur-sub chars))
274     (values nil nil))
275     (let ((piece (car pieces)))
276     (etypecase piece
277     (simple-string
278     (let ((end (+ start (length piece))))
279     (and (<= end len)
280     (string= piece string
281     :start2 start :end2 end)
282     (matches (cdr pieces) end
283     (maybe-prepend subs cur-sub chars)
284     nil nil))))
285     (list
286     (ecase (car piece)
287     (:character-set
288     (and (< start len)
289     (let ((char (schar string start)))
290     (if (find char (cdr piece) :test #'char=)
291     (matches (cdr pieces) (1+ start) subs t
292     (cons char chars))))))))
293     ((member :single-char-wild)
294     (and (< start len)
295     (matches (cdr pieces) (1+ start) subs t
296     (cons (schar string start) chars))))
297 ram 1.17 ((member :multi-char-wild)
298 phg 1.13 (multiple-value-bind
299     (won new-subs)
300     (matches (cdr pieces) start subs t chars)
301     (if won
302     (values t new-subs)
303     (and (< start len)
304     (matches pieces (1+ start) subs t
305     (cons (schar string start)
306     chars)))))))))))
307     (multiple-value-bind
308     (won subs)
309     (matches (pattern-pieces pattern) 0 nil nil nil)
310     (values won (reverse subs))))))
311 wlott 1.1
312 phg 1.16
313 ram 1.17 ;;; DIRECTORY-COMPONENTS-MATCH -- Internal
314 phg 1.16 ;;;
315 dtc 1.35 ;;; Pathname-match-p for directory components. If thing is empty
316     ;;; then it matches :wild, (:absolute :wild-inferiors), or (:relative
317     ;;; :wild-inferiors).
318 phg 1.16 ;;;
319 ram 1.17 (defun directory-components-match (thing wild)
320     (or (eq thing wild)
321     (eq wild :wild)
322     (and (consp wild)
323     (let ((wild1 (first wild)))
324 dtc 1.35 (cond ((and (null thing) (member wild1 '(:absolute :relative)))
325     (equal (rest wild) '(:wild-inferiors)))
326     ((eq wild1 :wild-inferiors)
327     (let ((wild-subdirs (rest wild)))
328     (or (null wild-subdirs)
329     (loop
330     (when (directory-components-match thing
331     wild-subdirs)
332     (return t))
333     (pop thing)
334     (unless thing (return nil))))))
335     ((consp thing)
336     (and (components-match (first thing) wild1)
337     (directory-components-match (rest thing)
338     (rest wild)))))))))
339 phg 1.16
340    
341 phg 1.13 ;;; COMPONENTS-MATCH -- Internal
342     ;;;
343 ram 1.17 ;;; Return true if pathname component Thing is matched by Wild. Not
344     ;;; commutative.
345 phg 1.13 ;;;
346 ram 1.17 (defun components-match (thing wild)
347     (declare (type (or pattern symbol simple-string integer) thing wild))
348     (or (eq thing wild)
349     (eq wild :wild)
350     (typecase thing
351 phg 1.13 (simple-base-string
352 ram 1.17 ;; String is matched by itself, a matching pattern or :WILD.
353     (typecase wild
354 phg 1.16 (pattern
355 ram 1.17 (values (pattern-matches wild thing)))
356 phg 1.13 (simple-base-string
357 ram 1.17 (string= thing wild))))
358 phg 1.13 (pattern
359 ram 1.17 ;; A pattern is only matched by an identical pattern.
360     (and (pattern-p wild) (pattern= thing wild)))
361     (integer
362     ;; an integer (version number) is matched by :WILD or the same
363     ;; integer. This branch will actually always be NIL as long is the
364     ;; version is a fixnum.
365     (eql thing wild)))))
366 phg 1.13
367 ram 1.17
368 phg 1.13 ;;; COMPARE-COMPONENT -- Internal
369     ;;;
370     ;;; A predicate for comparing two pathname slot component sub-entries.
371     ;;;
372 wlott 1.1 (defun compare-component (this that)
373     (or (eql this that)
374     (typecase this
375     (simple-string
376     (and (simple-string-p that)
377     (string= this that)))
378     (pattern
379     (and (pattern-p that)
380     (pattern= this that)))
381     (cons
382     (and (consp that)
383     (compare-component (car this) (car that))
384     (compare-component (cdr this) (cdr that)))))))
385    
386    
387 phg 1.13 ;;;; Pathname functions.
388 wlott 1.1
389 phg 1.13 ;;; Implementation determined defaults to pathname slots.
390 wlott 1.1
391     (defvar *default-pathname-defaults*)
392    
393 phg 1.13 ;;; PATHNAME= -- Internal
394     ;;;
395 wlott 1.1 (defun pathname= (pathname1 pathname2)
396 phg 1.16 (declare (type pathname pathname1)
397     (type pathname pathname2))
398 wlott 1.1 (and (eq (%pathname-host pathname1)
399     (%pathname-host pathname2))
400     (compare-component (%pathname-device pathname1)
401     (%pathname-device pathname2))
402     (compare-component (%pathname-directory pathname1)
403     (%pathname-directory pathname2))
404     (compare-component (%pathname-name pathname1)
405     (%pathname-name pathname2))
406     (compare-component (%pathname-type pathname1)
407     (%pathname-type pathname2))
408     (compare-component (%pathname-version pathname1)
409     (%pathname-version pathname2))))
410    
411 phg 1.13 ;;; WITH-PATHNAME -- Internal
412 phg 1.16 ;;; Converts the expr, a pathname designator (a pathname, or string, or
413 phg 1.13 ;;; stream), into a pathname.
414     ;;;
415 wlott 1.1 (defmacro with-pathname ((var expr) &body body)
416     `(let ((,var (let ((,var ,expr))
417     (etypecase ,var
418     (pathname ,var)
419     (string (parse-namestring ,var))
420 ram 1.21 (stream (file-name ,var))))))
421 wlott 1.1 ,@body))
422    
423 phg 1.16 ;;; WITH-HOST -- Internal
424     ;;;
425     ;;; Converts the var, a host or string name for a host, into a logical-host
426     ;;; structure or nil if not defined.
427     ;;;
428 pw 1.28 ;;; pw notes 1/12/97 this potentially useful macro is not used anywhere
429     ;;; and 'find-host' is not defined. 'find-logical-host' seems to be needed.
430     ;;;
431 phg 1.16 (defmacro with-host ((var expr) &body body)
432     `(let ((,var (let ((,var ,expr))
433     (typecase ,var
434     (logical-host ,var)
435 pw 1.28 (string (find-logical-host ,var nil))
436 phg 1.16 (t nil)))))
437     ,@body))
438 wlott 1.1
439 phg 1.13 ;;; PATHNAME -- Interface
440     ;;;
441 wlott 1.1 (defun pathname (thing)
442 phg 1.13 "Convert thing (a pathname, string or stream) into a pathname."
443 phg 1.16 (declare (type path-designator thing))
444 wlott 1.1 (with-pathname (pathname thing)
445     pathname))
446    
447 phg 1.13 ;;; MAYBE-DIDDLE-CASE -- Internal
448     ;;;
449     ;;; Change the case of thing if diddle-p T.
450     ;;;
451 wlott 1.1 (defun maybe-diddle-case (thing diddle-p)
452 ram 1.17 (if (and diddle-p (not (or (symbolp thing) (integerp thing))))
453 wlott 1.1 (labels ((check-for (pred in)
454 ram 1.17 (typecase in
455 wlott 1.1 (pattern
456     (dolist (piece (pattern-pieces in))
457     (when (typecase piece
458     (simple-string
459     (check-for pred piece))
460     (cons
461     (case (car in)
462     (:character-set
463     (check-for pred (cdr in))))))
464     (return t))))
465     (list
466     (dolist (x in)
467     (when (check-for pred x)
468     (return t))))
469     (simple-base-string
470     (dotimes (i (length in))
471     (when (funcall pred (schar in i))
472     (return t))))
473 ram 1.17 (t nil)))
474 wlott 1.1 (diddle-with (fun thing)
475 ram 1.17 (typecase thing
476 wlott 1.1 (pattern
477     (make-pattern
478     (mapcar #'(lambda (piece)
479     (typecase piece
480     (simple-base-string
481 pw 1.29 (funcall fun piece))
482 wlott 1.1 (cons
483     (case (car piece)
484     (:character-set
485     (cons :character-set
486     (funcall fun (cdr piece))))
487     (t
488     piece)))
489     (t
490     piece)))
491     (pattern-pieces thing))))
492     (list
493     (mapcar fun thing))
494 phg 1.12 (simple-base-string
495     (funcall fun thing))
496 ram 1.17 (t
497 phg 1.12 thing))))
498 wlott 1.1 (let ((any-uppers (check-for #'upper-case-p thing))
499     (any-lowers (check-for #'lower-case-p thing)))
500     (cond ((and any-uppers any-lowers)
501     ;; Mixed case, stays the same.
502     thing)
503 phg 1.12 (any-uppers
504     ;; All uppercase, becomes all lower case.
505     (diddle-with #'(lambda (x) (if (stringp x)
506     (string-downcase x)
507     x)) thing))
508     (any-lowers
509     ;; All lowercase, becomes all upper case.
510     (diddle-with #'(lambda (x) (if (stringp x)
511     (string-upcase x)
512     x)) thing))
513     (t
514     ;; No letters? I guess just leave it.
515     thing))))
516 wlott 1.1 thing))
517    
518 ram 1.17
519 phg 1.13 ;;; MERGE-DIRECTORIES -- Internal
520     ;;;
521 wlott 1.1 (defun merge-directories (dir1 dir2 diddle-case)
522 wlott 1.6 (if (or (eq (car dir1) :absolute)
523     (null dir2))
524 wlott 1.1 dir1
525     (let ((results nil))
526     (flet ((add (dir)
527     (if (and (eq dir :back)
528     results
529     (not (eq (car results) :back)))
530     (pop results)
531     (push dir results))))
532     (dolist (dir (maybe-diddle-case dir2 diddle-case))
533     (add dir))
534     (dolist (dir (cdr dir1))
535     (add dir)))
536     (reverse results))))
537    
538 phg 1.13 ;;; MERGE-PATHNAMES -- Interface
539     ;;;
540 wlott 1.1 (defun merge-pathnames (pathname
541     &optional
542     (defaults *default-pathname-defaults*)
543     (default-version :newest))
544 phg 1.13 "Construct a filled in pathname by completing the unspecified components
545     from the defaults."
546 phg 1.16 (declare (type path-designator pathname)
547     (type path-designator defaults)
548     (values pathname))
549 wlott 1.1 (with-pathname (defaults defaults)
550 wlott 1.2 (let ((pathname (let ((*default-pathname-defaults* defaults))
551     (pathname pathname))))
552 wlott 1.1 (let* ((default-host (%pathname-host defaults))
553     (pathname-host (%pathname-host pathname))
554     (diddle-case
555     (and default-host pathname-host
556     (not (eq (host-customary-case default-host)
557     (host-customary-case pathname-host))))))
558 pw 1.28 (%make-pathname-object
559     (or pathname-host default-host)
560     (or (%pathname-device pathname)
561     (maybe-diddle-case (%pathname-device defaults)
562     diddle-case))
563     (merge-directories (%pathname-directory pathname)
564     (%pathname-directory defaults)
565     diddle-case)
566     (or (%pathname-name pathname)
567     (maybe-diddle-case (%pathname-name defaults)
568     diddle-case))
569     (or (%pathname-type pathname)
570     (maybe-diddle-case (%pathname-type defaults)
571     diddle-case))
572     (or (%pathname-version pathname)
573     default-version))))))
574 wlott 1.1
575 phg 1.13 ;;; IMPORT-DIRECTORY -- Internal
576     ;;;
577 wlott 1.1 (defun import-directory (directory diddle-case)
578     (etypecase directory
579     (null nil)
580 ram 1.17 ((member :wild) '(:absolute :wild-inferiors))
581     ((member :unspecific) '(:relative))
582 wlott 1.1 (list
583     (collect ((results))
584     (ecase (pop directory)
585     (:absolute
586     (results :absolute)
587     (when (search-list-p (car directory))
588     (results (pop directory))))
589     (:relative
590     (results :relative)))
591     (dolist (piece directory)
592 ram 1.17 (cond ((member piece '(:wild :wild-inferiors :up :back))
593 phg 1.12 (results piece))
594 wlott 1.1 ((or (simple-string-p piece) (pattern-p piece))
595     (results (maybe-diddle-case piece diddle-case)))
596     ((stringp piece)
597     (results (maybe-diddle-case (coerce piece 'simple-string)
598     diddle-case)))
599     (t
600     (error "~S is not allowed as a directory component." piece))))
601     (results)))
602     (simple-string
603     `(:absolute
604     ,(maybe-diddle-case directory diddle-case)))
605     (string
606     `(:absolute
607     ,(maybe-diddle-case (coerce directory 'simple-string)
608     diddle-case)))))
609    
610 phg 1.13 ;;; MAKE-PATHNAME -- Interface
611     ;;;
612 phg 1.16 (defun make-pathname (&key host
613 ram 1.11 (device nil devp)
614     (directory nil dirp)
615     (name nil namep)
616     (type nil typep)
617     (version nil versionp)
618 phg 1.16 defaults
619     (case :local))
620 ram 1.27 "Makes a new pathname from the component arguments. Note that host is
621     a host-structure or string."
622     (declare (type (or string host component-tokens) host)
623 dtc 1.32 (type (or string component-tokens) device)
624 ram 1.17 (type (or list string pattern component-tokens) directory)
625     (type (or string pattern component-tokens) name type)
626     (type (or integer component-tokens (member :newest)) version)
627 phg 1.16 (type (or path-designator null) defaults)
628 wlott 1.1 (type (member :common :local) case))
629 phg 1.16 (let* ((defaults (when defaults
630     (with-pathname (defaults defaults) defaults)))
631 wlott 1.1 (default-host (if defaults
632     (%pathname-host defaults)
633     (pathname-host *default-pathname-defaults*)))
634 ram 1.27 ;; toy@rtp.ericsson.se: CLHS says make-pathname can take a
635     ;; string (as a logical-host) for the host part. We map that
636     ;; string into the corresponding logical host structure.
637 pw 1.28
638     ;; pw@snoopy.mv.com:
639     ;; HyperSpec says for the arg to MAKE-PATHNAME;
640     ;; "host---a valid physical pathname host. ..."
641     ;; where it probably means -- a valid pathname host.
642     ;; "valid pathname host n. a valid physical pathname host or
643     ;; a valid logical pathname host."
644     ;; and defines
645     ;; "valid physical pathname host n. any of a string,
646     ;; a list of strings, or the symbol :unspecific,
647     ;; that is recognized by the implementation as the name of a host."
648     ;; "valid logical pathname host n. a string that has been defined
649     ;; as the name of a logical host. ..."
650     ;; HS is silent on what happens if the :host arg is NOT one of these.
651     ;; It seems an error message is appropriate.
652     (host (typecase host
653     (host host) ; A valid host, use it.
654     (string (find-logical-host host t)) ; logical-host or lose.
655     (t default-host))) ; unix-host
656 ram 1.18 (diddle-args (and (eq (host-customary-case host) :lower)
657     (eq case :common)))
658 wlott 1.1 (diddle-defaults
659     (not (eq (host-customary-case host)
660 phg 1.16 (host-customary-case default-host))))
661     (dev (if devp device (if defaults (%pathname-device defaults))))
662     (dir (import-directory directory diddle-args))
663     (ver (cond
664     (versionp version)
665     (defaults (%pathname-version defaults))
666     (t nil))))
667     (when (and defaults (not dirp))
668     (setf dir
669     (merge-directories dir
670     (%pathname-directory defaults)
671     diddle-defaults)))
672    
673 ram 1.11 (macrolet ((pick (var varp field)
674 ram 1.17 `(cond ((or (simple-string-p ,var)
675 wlott 1.1 (pattern-p ,var))
676     (maybe-diddle-case ,var diddle-args))
677     ((stringp ,var)
678     (maybe-diddle-case (coerce ,var 'simple-string)
679     diddle-args))
680 ram 1.11 (,varp
681 wlott 1.1 (maybe-diddle-case ,var diddle-args))
682     (defaults
683     (maybe-diddle-case (,field defaults)
684     diddle-defaults))
685     (t
686     nil))))
687 pw 1.28 (%make-pathname-object host
688     dev ; forced to :unspecific when logical-host
689     dir
690     (pick name namep %pathname-name)
691     (pick type typep %pathname-type)
692     ver))))
693 wlott 1.1
694 phg 1.13 ;;; PATHNAME-HOST -- Interface
695     ;;;
696 wlott 1.1 (defun pathname-host (pathname &key (case :local))
697 phg 1.13 "Accessor for the pathname's host."
698 phg 1.16 (declare (type path-designator pathname)
699 wlott 1.1 (type (member :local :common) case)
700 phg 1.16 (values host)
701 wlott 1.1 (ignore case))
702     (with-pathname (pathname pathname)
703     (%pathname-host pathname)))
704    
705 phg 1.13 ;;; PATHNAME-DEVICE -- Interface
706     ;;;
707 wlott 1.1 (defun pathname-device (pathname &key (case :local))
708 phg 1.13 "Accessor for pathname's device."
709 phg 1.16 (declare (type path-designator pathname)
710 wlott 1.1 (type (member :local :common) case))
711     (with-pathname (pathname pathname)
712     (maybe-diddle-case (%pathname-device pathname)
713     (and (eq case :common)
714     (eq (host-customary-case
715     (%pathname-host pathname))
716     :lower)))))
717    
718 phg 1.13 ;;; PATHNAME-DIRECTORY -- Interface
719     ;;;
720 wlott 1.1 (defun pathname-directory (pathname &key (case :local))
721 phg 1.13 "Accessor for the pathname's directory list."
722 phg 1.16 (declare (type path-designator pathname)
723 wlott 1.1 (type (member :local :common) case))
724     (with-pathname (pathname pathname)
725     (maybe-diddle-case (%pathname-directory pathname)
726     (and (eq case :common)
727     (eq (host-customary-case
728     (%pathname-host pathname))
729     :lower)))))
730 phg 1.13 ;;; PATHNAME-NAME -- Interface
731     ;;;
732 wlott 1.1 (defun pathname-name (pathname &key (case :local))
733 phg 1.13 "Accessor for the pathname's name."
734 phg 1.16 (declare (type path-designator pathname)
735 wlott 1.1 (type (member :local :common) case))
736     (with-pathname (pathname pathname)
737     (maybe-diddle-case (%pathname-name pathname)
738     (and (eq case :common)
739     (eq (host-customary-case
740     (%pathname-host pathname))
741     :lower)))))
742    
743 phg 1.13 ;;; PATHNAME-TYPE
744     ;;;
745 wlott 1.1 (defun pathname-type (pathname &key (case :local))
746 phg 1.13 "Accessor for the pathname's name."
747 phg 1.16 (declare (type path-designator pathname)
748 wlott 1.1 (type (member :local :common) case))
749     (with-pathname (pathname pathname)
750     (maybe-diddle-case (%pathname-type pathname)
751     (and (eq case :common)
752     (eq (host-customary-case
753     (%pathname-host pathname))
754     :lower)))))
755 phg 1.16
756 phg 1.13 ;;; PATHNAME-VERSION
757     ;;;
758 wlott 1.1 (defun pathname-version (pathname)
759 phg 1.13 "Accessor for the pathname's version."
760 phg 1.16 (declare (type path-designator pathname))
761 wlott 1.1 (with-pathname (pathname pathname)
762     (%pathname-version pathname)))
763    
764 phg 1.13
765     ;;;; Namestrings
766    
767     ;;; %PRINT-NAMESTRING-PARSE-ERROR -- Internal
768     ;;;
769     (defun %print-namestring-parse-error (condition stream)
770     (format stream "Parse error in namestring: ~?~% ~A~% ~V@T^"
771     (namestring-parse-error-complaint condition)
772     (namestring-parse-error-arguments condition)
773     (namestring-parse-error-namestring condition)
774     (namestring-parse-error-offset condition)))
775    
776 ram 1.17 (define-condition namestring-parse-error (parse-error)
777 ram 1.24 ((complaint :reader namestring-parse-error-complaint :initarg :complaint)
778     (arguments :reader namestring-parse-error-arguments :initarg :arguments
779     :initform nil)
780     (namestring :reader namestring-parse-error-namestring :initarg :namestring)
781     (offset :reader namestring-parse-error-offset :initarg :offset))
782 phg 1.13 (:report %print-namestring-parse-error))
783    
784    
785 ram 1.17 ;;; %PARSE-NAMESTRING -- Internal
786 phg 1.16 ;;;
787 ram 1.17 ;;; Handle the case where parse-namestring is actually parsing a namestring.
788     ;;; We pick off the :JUNK-ALLOWED case then find a host to use for parsing,
789     ;;; call the parser, then check if the host matches.
790     ;;;
791     (defun %parse-namestring (namestr host defaults start end junk-allowed)
792     (declare (type (or host null) host) (type string namestr)
793     (type index start) (type (or index null) end))
794     (if junk-allowed
795     (handler-case
796     (%parse-namestring namestr host defaults start end nil)
797     (namestring-parse-error (condition)
798     (values nil (namestring-parse-error-offset condition))))
799     (let* ((end (or end (length namestr)))
800     (parse-host (or host
801     (extract-logical-host-prefix namestr start end)
802     (pathname-host defaults))))
803     (unless parse-host
804     (error "When Host arg is not supplied, Defaults arg must ~
805     have a non-null PATHNAME-HOST."))
806 phg 1.16
807 ram 1.17 (multiple-value-bind
808     (new-host device directory file type version)
809     (funcall (host-parse parse-host) namestr start end)
810     (when (and host new-host (not (eq new-host host)))
811     (error "Host in namestring: ~S~@
812     does not match explicit host argument: ~S"
813     host))
814     (let ((pn-host (or new-host parse-host)))
815 pw 1.28 (values (%make-pathname-object
816     pn-host device directory file type version)
817 ram 1.17 end))))))
818    
819    
820     ;;; EXTRACT-LOGICAL-HOST-PREFIX -- Internal
821 phg 1.16 ;;;
822 ram 1.17 ;;; If namestr begins with a colon-terminated, defined, logical host, then
823     ;;; return that host, otherwise return NIL.
824 phg 1.16 ;;;
825 ram 1.17 (defun extract-logical-host-prefix (namestr start end)
826 phg 1.16 (declare (type simple-base-string namestr)
827     (type index start end)
828 ram 1.17 (values (or logical-host null)))
829     (let ((colon-pos (position #\: namestr :start start :end end)))
830     (if colon-pos
831     (values (gethash (nstring-upcase (subseq namestr start colon-pos))
832     *logical-hosts*))
833     nil)))
834 phg 1.16
835 ram 1.17
836 phg 1.13 ;;; PARSE-NAMESTRING -- Interface
837     ;;;
838     (defun parse-namestring (thing
839     &optional host (defaults *default-pathname-defaults*)
840     &key (start 0) end junk-allowed)
841 phg 1.16 "Converts pathname, a pathname designator, into a pathname structure,
842     for a physical pathname, returns the printed representation. Host may be
843     a physical host structure or host namestring."
844     (declare (type path-designator thing)
845 phg 1.13 (type (or null host) host)
846 phg 1.16 (type pathname defaults)
847 phg 1.13 (type index start)
848     (type (or index null) end)
849 phg 1.16 (type (or t null) junk-allowed)
850     (values (or null pathname) (or null index)))
851     (typecase thing
852 ram 1.17 (simple-string
853     (%parse-namestring thing host defaults start end junk-allowed))
854     (string
855     (%parse-namestring (coerce thing 'simple-string)
856     host defaults start end junk-allowed))
857     (pathname
858 dtc 1.31 (let ((host (if host host (%pathname-host defaults))))
859     (unless (eq host (%pathname-host thing))
860 phg 1.16 (error "Hosts do not match: ~S and ~S."
861 dtc 1.31 host (%pathname-host thing))))
862 phg 1.16 (values thing start))
863     (stream
864 ram 1.21 (let ((name (file-name thing)))
865     (unless name
866 ram 1.17 (error "Can't figure out the file associated with stream:~% ~S"
867     thing))
868 ram 1.21 name))))
869 phg 1.13
870 ram 1.17
871 phg 1.13 ;;; NAMESTRING -- Interface
872     ;;;
873 wlott 1.1 (defun namestring (pathname)
874 phg 1.12 "Construct the full (name)string form of the pathname."
875 phg 1.16 (declare (type path-designator pathname)
876     (values (or null simple-base-string)))
877 wlott 1.1 (with-pathname (pathname pathname)
878 wlott 1.23 (when pathname
879     (let ((host (%pathname-host pathname)))
880     (unless host
881     (error "Cannot determine the namestring for pathnames with no ~
882     host:~% ~S" pathname))
883     (funcall (host-unparse host) pathname)))))
884 wlott 1.1
885 ram 1.17
886 phg 1.13 ;;; HOST-NAMESTRING -- Interface
887     ;;;
888 wlott 1.1 (defun host-namestring (pathname)
889 phg 1.13 "Returns a string representation of the name of the host in the pathname."
890 phg 1.16 (declare (type path-designator pathname)
891     (values (or null simple-base-string)))
892 wlott 1.1 (with-pathname (pathname pathname)
893     (let ((host (%pathname-host pathname)))
894     (if host
895     (funcall (host-unparse-host host) pathname)
896     (error
897     "Cannot determine the namestring for pathnames with no host:~% ~S"
898     pathname)))))
899    
900 phg 1.13 ;;; DIRECTORY-NAMESTRING -- Interface
901     ;;;
902 wlott 1.1 (defun directory-namestring (pathname)
903 phg 1.13 "Returns a string representation of the directories used in the pathname."
904 phg 1.16 (declare (type path-designator pathname)
905     (values (or null simple-base-string)))
906 wlott 1.1 (with-pathname (pathname pathname)
907     (let ((host (%pathname-host pathname)))
908     (if host
909     (funcall (host-unparse-directory host) pathname)
910     (error
911     "Cannot determine the namestring for pathnames with no host:~% ~S"
912     pathname)))))
913    
914 phg 1.13 ;;; FILE-NAMESTRING -- Interface
915     ;;;
916 wlott 1.1 (defun file-namestring (pathname)
917 phg 1.13 "Returns a string representation of the name used in the pathname."
918 phg 1.16 (declare (type path-designator pathname)
919     (values (or null simple-base-string)))
920 wlott 1.1 (with-pathname (pathname pathname)
921     (let ((host (%pathname-host pathname)))
922     (if host
923     (funcall (host-unparse-file host) pathname)
924     (error
925     "Cannot determine the namestring for pathnames with no host:~% ~S"
926     pathname)))))
927    
928 phg 1.13 ;;; ENOUGH-NAMESTRING -- Interface
929     ;;;
930 wlott 1.1 (defun enough-namestring (pathname
931     &optional (defaults *default-pathname-defaults*))
932 phg 1.13 "Returns an abbreviated pathname sufficent to identify the pathname relative
933     to the defaults."
934 phg 1.16 (declare (type path-designator pathname))
935 wlott 1.1 (with-pathname (pathname pathname)
936     (let ((host (%pathname-host pathname)))
937     (if host
938     (with-pathname (defaults defaults)
939     (funcall (host-unparse-enough host) pathname defaults))
940     (error
941     "Cannot determine the namestring for pathnames with no host:~% ~S"
942     pathname)))))
943    
944    
945     ;;;; Wild pathnames.
946    
947 phg 1.13 ;;; WILD-PATHNAME-P -- Interface
948     ;;;
949 wlott 1.1 (defun wild-pathname-p (pathname &optional field-key)
950 phg 1.13 "Predicate for determining whether pathname contains any wildcards."
951 phg 1.16 (declare (type path-designator pathname)
952 wlott 1.1 (type (member nil :host :device :directory :name :type :version)
953     field-key))
954     (with-pathname (pathname pathname)
955 ram 1.17 (flet ((frob (x)
956     (or (pattern-p x) (member x '(:wild :wild-inferiors)))))
957     (ecase field-key
958     ((nil)
959     (or (wild-pathname-p pathname :host)
960     (wild-pathname-p pathname :device)
961     (wild-pathname-p pathname :directory)
962     (wild-pathname-p pathname :name)
963     (wild-pathname-p pathname :type)
964     (wild-pathname-p pathname :version)))
965     (:host (frob (%pathname-host pathname)))
966 dtc 1.38 (:device (frob (%pathname-device pathname)))
967 ram 1.17 (:directory (some #'frob (%pathname-directory pathname)))
968     (:name (frob (%pathname-name pathname)))
969     (:type (frob (%pathname-type pathname)))
970     (:version (frob (%pathname-version pathname)))))))
971 wlott 1.1
972 ram 1.17
973     ;;; PATHNAME-MATCH-P -- Interface
974 phg 1.13 ;;;
975 phg 1.16 (defun pathname-match-p (in-pathname in-wildname)
976 phg 1.12 "Pathname matches the wildname template?"
977 phg 1.16 (declare (type path-designator in-pathname))
978     (with-pathname (pathname in-pathname)
979     (with-pathname (wildname in-wildname)
980 ram 1.17 (macrolet ((frob (field &optional (op 'components-match ))
981 wlott 1.1 `(or (null (,field wildname))
982 ram 1.17 (,op (,field pathname) (,field wildname)))))
983 phg 1.16 (and (or (null (%pathname-host wildname))
984 ram 1.17 (eq (%pathname-host wildname) (%pathname-host pathname)))
985 wlott 1.1 (frob %pathname-device)
986 ram 1.17 (frob %pathname-directory directory-components-match)
987 wlott 1.1 (frob %pathname-name)
988     (frob %pathname-type)
989 ram 1.17 (frob %pathname-version))))))
990 wlott 1.1
991 ram 1.17
992 phg 1.13 ;;; SUBSTITUTE-INTO -- Internal
993     ;;;
994 ram 1.17 ;;; Place the substitutions into the pattern and return the string or pattern
995     ;;; that results. If DIDDLE-CASE is true, we diddle the result case as well,
996     ;;; in case we are translating between hosts with difference conventional case.
997     ;;; The second value is the tail of subs with all of the values that we used up
998     ;;; stripped off. Note that PATTERN-MATCHES matches all consecutive wildcards
999     ;;; as a single string, so we ignore subsequent contiguous wildcards.
1000 phg 1.16 ;;;
1001 ram 1.17 (defun substitute-into (pattern subs diddle-case)
1002 wlott 1.1 (declare (type pattern pattern)
1003 phg 1.16 (type list subs)
1004     (values (or simple-base-string pattern)))
1005 wlott 1.1 (let ((in-wildcard nil)
1006     (pieces nil)
1007     (strings nil))
1008     (dolist (piece (pattern-pieces pattern))
1009     (cond ((simple-string-p piece)
1010 ram 1.17 (push piece strings)
1011 wlott 1.1 (setf in-wildcard nil))
1012     (in-wildcard)
1013     (t
1014 ram 1.17 (setf in-wildcard t)
1015     (unless subs
1016     (error "Not enough wildcards in FROM pattern to match ~
1017     TO pattern:~% ~S"
1018     pattern))
1019 wlott 1.1 (let ((sub (pop subs)))
1020 ram 1.17 (typecase sub
1021 wlott 1.1 (pattern
1022     (when strings
1023     (push (apply #'concatenate 'simple-string
1024     (nreverse strings))
1025     pieces))
1026     (dolist (piece (pattern-pieces sub))
1027 ram 1.17 (push piece pieces)))
1028 wlott 1.1 (simple-string
1029 ram 1.17 (push sub strings))
1030     (t
1031     (error "Can't substitute this into the middle of a word:~
1032     ~% ~S"
1033     sub)))))))
1034    
1035 wlott 1.1 (when strings
1036 phg 1.16 (push (apply #'concatenate 'simple-string (nreverse strings))
1037 wlott 1.1 pieces))
1038 ram 1.17 (values
1039     (maybe-diddle-case
1040     (if (and pieces (simple-string-p (car pieces)) (null (cdr pieces)))
1041     (car pieces)
1042     (make-pattern (nreverse pieces)))
1043     diddle-case)
1044     subs)))
1045 wlott 1.1
1046 ram 1.17
1047     ;;; DIDNT-MATCH-ERROR -- Internal
1048     ;;;
1049     ;;; Called when we can't see how source and from matched.
1050     ;;;
1051     (defun didnt-match-error (source from)
1052     (error "Pathname components from Source and From args to TRANSLATE-PATHNAME~@
1053     did not match:~% ~S ~S"
1054     source from))
1055    
1056    
1057 phg 1.13 ;;; TRANSLATE-COMPONENT -- Internal
1058     ;;;
1059 ram 1.17 ;;; Do TRANSLATE-COMPONENT for all components except host and directory.
1060 phg 1.13 ;;;
1061 ram 1.17 (defun translate-component (source from to diddle-case)
1062 wlott 1.1 (typecase to
1063     (pattern
1064 ram 1.17 (typecase from
1065     (pattern
1066     (typecase source
1067     (pattern
1068     (if (pattern= from source)
1069     source
1070     (didnt-match-error source from)))
1071     (simple-string
1072     (multiple-value-bind
1073     (won subs)
1074     (pattern-matches from source)
1075     (if won
1076     (values (substitute-into to subs diddle-case))
1077     (didnt-match-error source from))))
1078     (t
1079     (maybe-diddle-case source diddle-case))))
1080     ((member :wild)
1081     (values (substitute-into to (list source) diddle-case)))
1082     (t
1083     (if (components-match source from)
1084     (maybe-diddle-case source diddle-case)
1085     (didnt-match-error source from)))))
1086 wlott 1.1 ((member nil :wild)
1087 ram 1.17 (maybe-diddle-case source diddle-case))
1088 wlott 1.1 (t
1089     (if (components-match source from)
1090     to
1091 ram 1.17 (didnt-match-error source from)))))
1092 wlott 1.1
1093 ram 1.17
1094     ;;; COMPUTE-DIRECTORY-SUBSTITUTIONS -- Internal
1095     ;;;
1096     ;;; Return a list of all the things that we want to substitute into the TO
1097     ;;; pattern (the things matched by from on source.) When From contains
1098     ;;; :WILD-INFERIORS, the result contains a sublist of the matched source
1099     ;;; subdirectories.
1100     ;;;
1101     (defun compute-directory-substitutions (orig-source orig-from)
1102     (let ((source orig-source)
1103     (from orig-from))
1104     (collect ((subs))
1105     (loop
1106     (unless source
1107     (unless (every #'(lambda (x) (eq x :wild-inferiors)) from)
1108     (didnt-match-error orig-source orig-from))
1109     (subs ())
1110     (return))
1111     (unless from (didnt-match-error orig-source orig-from))
1112     (let ((from-part (pop from))
1113     (source-part (pop source)))
1114     (typecase from-part
1115     (pattern
1116     (typecase source-part
1117     (pattern
1118     (if (pattern= from-part source-part)
1119     (subs source-part)
1120     (didnt-match-error orig-source orig-from)))
1121     (simple-string
1122     (multiple-value-bind
1123     (won new-subs)
1124     (pattern-matches from-part source-part)
1125     (if won
1126     (dolist (sub new-subs)
1127     (subs sub))
1128     (didnt-match-error orig-source orig-from))))
1129     (t
1130     (didnt-match-error orig-source orig-from))))
1131     ((member :wild)
1132     (subs source-part))
1133     ((member :wild-inferiors)
1134     (let ((remaining-source (cons source-part source)))
1135     (collect ((res))
1136     (loop
1137     (when (directory-components-match remaining-source from)
1138     (return))
1139     (unless remaining-source
1140     (didnt-match-error orig-source orig-from))
1141     (res (pop remaining-source)))
1142     (subs (res))
1143     (setq source remaining-source))))
1144     (simple-string
1145     (unless (and (simple-string-p source-part)
1146     (string= from-part source-part))
1147     (didnt-match-error orig-source orig-from)))
1148     (t
1149     (didnt-match-error orig-source orig-from)))))
1150     (subs))))
1151    
1152    
1153 phg 1.13 ;;; TRANSLATE-DIRECTORIES -- Internal
1154     ;;;
1155 ram 1.17 ;;; Called by TRANSLATE-PATHNAME on the directory components of its argument
1156     ;;; pathanames to produce the result directory component. If any leaves the
1157     ;;; directory NIL, we return the source directory. The :RELATIVE or :ABSOLUTE
1158 dtc 1.36 ;;; is taken from the source directory, except if TO is :ABSOLUTE, in which
1159     ;;; case the result will be :ABSOLUTE.
1160 ram 1.17 ;;;
1161     (defun translate-directories (source from to diddle-case)
1162     (if (not (and source to from))
1163 dtc 1.37 (let ((source (mapcar #'(lambda (x) (maybe-diddle-case x diddle-case))
1164     source)))
1165     (if (null to)
1166     source
1167     (collect ((res))
1168     (res (cond ((null source) (first to))
1169     ((eq (first to) :absolute) :absolute)
1170     (t (first source))))
1171     (let ((match (rest source)))
1172     (dolist (to-part (rest to))
1173     (cond ((eq to-part :wild)
1174     (when match
1175     (res (first match))
1176     (setf match nil)))
1177     ((eq to-part :wild-inferiors)
1178     (when match
1179     (dolist (src-part match)
1180     (res src-part))
1181     (setf match nil)))
1182     (t
1183     (res to-part)))))
1184     (res))))
1185 ram 1.17 (collect ((res))
1186 dtc 1.35 (res (if (eq (first to) :absolute)
1187     :absolute
1188     (first source)))
1189 ram 1.17 (let ((subs-left (compute-directory-substitutions (rest source)
1190     (rest from))))
1191     (dolist (to-part (rest to))
1192     (typecase to-part
1193     ((member :wild)
1194     (assert subs-left)
1195     (let ((match (pop subs-left)))
1196     (when (listp match)
1197     (error ":WILD-INFERIORS not paired in from and to ~
1198     patterns:~% ~S ~S" from to))
1199 dtc 1.33 (res (maybe-diddle-case match diddle-case))))
1200 ram 1.17 ((member :wild-inferiors)
1201     (assert subs-left)
1202     (let ((match (pop subs-left)))
1203     (unless (listp match)
1204     (error ":WILD-INFERIORS not paired in from and to ~
1205     patterns:~% ~S ~S" from to))
1206     (dolist (x match)
1207     (res (maybe-diddle-case x diddle-case)))))
1208     (pattern
1209     (multiple-value-bind
1210     (new new-subs-left)
1211     (substitute-into to-part subs-left diddle-case)
1212     (setf subs-left new-subs-left)
1213 dtc 1.33 (res new)))
1214 ram 1.17 (t (res to-part)))))
1215     (res))))
1216 wlott 1.1
1217 ram 1.17
1218 phg 1.13 ;;; TRANSLATE-PATHNAME -- Interface
1219     ;;;
1220 wlott 1.1 (defun translate-pathname (source from-wildname to-wildname &key)
1221 phg 1.13 "Use the source pathname to translate the from-wildname's wild and
1222     unspecified elements into a completed to-pathname based on the to-wildname."
1223 phg 1.16 (declare (type path-designator source from-wildname to-wildname))
1224 wlott 1.1 (with-pathname (source source)
1225     (with-pathname (from from-wildname)
1226     (with-pathname (to to-wildname)
1227 ram 1.17 (let* ((source-host (%pathname-host source))
1228     (to-host (%pathname-host to))
1229     (diddle-case
1230     (and source-host to-host
1231     (not (eq (host-customary-case source-host)
1232     (host-customary-case to-host))))))
1233     (macrolet ((frob (field &optional (op 'translate-component))
1234     `(let ((result (,op (,field source)
1235     (,field from)
1236     (,field to)
1237     diddle-case)))
1238 wlott 1.1 (if (eq result :error)
1239     (error "~S doesn't match ~S" source from)
1240 ram 1.17 result))))
1241 pw 1.28 (%make-pathname-object
1242     (or to-host source-host)
1243     (frob %pathname-device)
1244     (frob %pathname-directory translate-directories)
1245     (frob %pathname-name)
1246     (frob %pathname-type)
1247     (frob %pathname-version))))))))
1248 wlott 1.1
1249    
1250     ;;;; Search lists.
1251    
1252     ;;; The SEARCH-LIST structure.
1253     ;;;
1254     (defstruct (search-list
1255     (:print-function %print-search-list)
1256     (:make-load-form-fun
1257     (lambda (search-list)
1258     (values `(intern-search-list ',(search-list-name search-list))
1259     nil))))
1260     ;;
1261     ;; The name of this search-list. Always stored in lowercase.
1262     (name (required-argument) :type simple-string)
1263     ;;
1264     ;; T if this search-list has been defined. Otherwise NIL.
1265     (defined nil :type (member t nil))
1266     ;;
1267     ;; The list of expansions for this search-list. Each expansion is the list
1268     ;; of directory components to use in place of this search-list.
1269 ram 1.21 (expansions nil :type list))
1270 ram 1.4
1271 wlott 1.1 (defun %print-search-list (sl stream depth)
1272     (declare (ignore depth))
1273     (print-unreadable-object (sl stream :type t)
1274     (write-string (search-list-name sl) stream)))
1275    
1276     ;;; *SEARCH-LISTS* -- internal.
1277     ;;;
1278     ;;; Hash table mapping search-list names to search-list structures.
1279     ;;;
1280     (defvar *search-lists* (make-hash-table :test #'equal))
1281    
1282     ;;; INTERN-SEARCH-LIST -- internal interface.
1283     ;;;
1284     ;;; When search-lists are encountered in namestrings, they are converted to
1285     ;;; search-list structures right then, instead of waiting until the search
1286     ;;; list used. This allows us to verify ahead of time that there are no
1287     ;;; circularities and makes expansion much quicker.
1288     ;;;
1289     (defun intern-search-list (name)
1290     (let ((name (string-downcase name)))
1291     (or (gethash name *search-lists*)
1292     (let ((new (make-search-list :name name)))
1293     (setf (gethash name *search-lists*) new)
1294     new))))
1295    
1296     ;;; CLEAR-SEARCH-LIST -- public.
1297     ;;;
1298     ;;; Clear the definition. Note: we can't remove it from the hash-table
1299     ;;; because there may be pathnames still refering to it. So we just clear
1300     ;;; out the expansions and ste defined to NIL.
1301     ;;;
1302     (defun clear-search-list (name)
1303     "Clear the current definition for the search-list NAME. Returns T if such
1304     a definition existed, and NIL if not."
1305     (let* ((name (string-downcase name))
1306     (search-list (gethash name *search-lists*)))
1307     (when (and search-list (search-list-defined search-list))
1308     (setf (search-list-defined search-list) nil)
1309     (setf (search-list-expansions search-list) nil)
1310     t)))
1311    
1312     ;;; CLEAR-ALL-SEARCH-LISTS -- sorta public.
1313     ;;;
1314     ;;; Again, we can't actually remove the entries from the hash-table, so we
1315     ;;; just mark them as being undefined.
1316     ;;;
1317     (defun clear-all-search-lists ()
1318     "Clear the definition for all search-lists. Only use this if you know
1319     what you are doing."
1320     (maphash #'(lambda (name search-list)
1321     (declare (ignore name))
1322     (setf (search-list-defined search-list) nil)
1323     (setf (search-list-expansions search-list) nil))
1324     *search-lists*)
1325     nil)
1326    
1327     ;;; EXTRACT-SEARCH-LIST -- internal.
1328     ;;;
1329     ;;; Extract the search-list from PATHNAME and return it. If PATHNAME
1330     ;;; doesn't start with a search-list, then either error (if FLAME-IF-NONE
1331     ;;; is true) or return NIL (if FLAME-IF-NONE is false).
1332     ;;;
1333     (defun extract-search-list (pathname flame-if-none)
1334     (with-pathname (pathname pathname)
1335     (let* ((directory (%pathname-directory pathname))
1336     (search-list (cadr directory)))
1337     (cond ((search-list-p search-list)
1338     search-list)
1339     (flame-if-none
1340 wlott 1.8 (error "~S doesn't start with a search-list." pathname))
1341 wlott 1.1 (t
1342     nil)))))
1343    
1344     ;;; SEARCH-LIST -- public.
1345     ;;;
1346     ;;; We have to convert the internal form of the search-list back into a
1347     ;;; bunch of pathnames.
1348     ;;;
1349     (defun search-list (pathname)
1350     "Return the expansions for the search-list starting PATHNAME. If PATHNAME
1351     does not start with a search-list, then an error is signaled. If
1352     the search-list has not been defined yet, then an error is signaled.
1353 phg 1.16 The expansion for a search-list can be set with SETF."
1354 wlott 1.1 (with-pathname (pathname pathname)
1355     (let ((search-list (extract-search-list pathname t))
1356 phg 1.16 (host (pathname-host pathname)))
1357 wlott 1.1 (if (search-list-defined search-list)
1358     (mapcar #'(lambda (directory)
1359     (make-pathname :host host
1360     :directory (cons :absolute directory)))
1361     (search-list-expansions search-list))
1362     (error "Search list ~S has not been defined yet." pathname)))))
1363 wlott 1.9
1364     ;;; SEARCH-LIST-DEFINED-P -- public.
1365     ;;;
1366     (defun search-list-defined-p (pathname)
1367     "Returns T if the search-list starting PATHNAME is currently defined, and
1368     NIL otherwise. An error is signaled if PATHNAME does not start with a
1369     search-list."
1370     (with-pathname (pathname pathname)
1371     (search-list-defined (extract-search-list pathname t))))
1372 wlott 1.1
1373     ;;; %SET-SEARCH-LIST -- public setf method
1374     ;;;
1375     ;;; Set the expansion for the search-list in PATHNAME. If this would result
1376     ;;; in any circularities, we flame out. If anything goes wrong, we leave the
1377     ;;; old defintion intact.
1378     ;;;
1379     (defun %set-search-list (pathname values)
1380     (let ((search-list (extract-search-list pathname t)))
1381     (labels
1382     ((check (target-list path)
1383     (when (eq search-list target-list)
1384     (error "That would result in a circularity:~% ~
1385     ~A~{ -> ~A~} -> ~A"
1386     (search-list-name search-list)
1387     (reverse path)
1388     (search-list-name target-list)))
1389     (when (search-list-p target-list)
1390     (push (search-list-name target-list) path)
1391     (dolist (expansion (search-list-expansions target-list))
1392     (check (car expansion) path))))
1393     (convert (pathname)
1394     (with-pathname (pathname pathname)
1395     (when (or (pathname-name pathname)
1396     (pathname-type pathname)
1397     (pathname-version pathname))
1398     (error "Search-lists cannot expand into pathnames that have ~
1399     a name, type, or ~%version specified:~% ~S"
1400     pathname))
1401     (let ((directory (pathname-directory pathname)))
1402 wlott 1.7 (let ((expansion
1403     (if directory
1404     (ecase (car directory)
1405     (:absolute (cdr directory))
1406     (:relative (cons (intern-search-list "default")
1407     (cdr directory))))
1408     (list (intern-search-list "default")))))
1409 wlott 1.1 (check (car expansion) nil)
1410     expansion)))))
1411     (setf (search-list-expansions search-list)
1412     (if (listp values)
1413     (mapcar #'convert values)
1414     (list (convert values)))))
1415     (setf (search-list-defined search-list) t))
1416     values)
1417    
1418     ;;; ENUMERATE-SEARCH-LIST -- public.
1419     ;;;
1420     (defmacro enumerate-search-list ((var pathname &optional result) &body body)
1421     "Execute BODY with VAR bound to each successive possible expansion for
1422     PATHNAME and then return RESULT. Note: if PATHNAME does not contain a
1423     search-list, then BODY is executed exactly once. Everything is wrapped
1424     in a block named NIL, so RETURN can be used to terminate early. Note:
1425     VAR is *not* bound inside of RESULT."
1426     (let ((body-name (gensym)))
1427     `(block nil
1428     (flet ((,body-name (,var)
1429     ,@body))
1430     (%enumerate-search-list ,pathname #',body-name)
1431     ,result))))
1432    
1433     (defun %enumerate-search-list (pathname function)
1434 ram 1.22 (let* ((pathname (if (logical-pathname-p pathname)
1435     (translate-logical-pathname pathname)
1436     pathname))
1437 ram 1.21 (search-list (extract-search-list pathname nil)))
1438 wlott 1.1 (cond
1439     ((not search-list)
1440     (funcall function pathname))
1441     ((not (search-list-defined search-list))
1442     (error "Undefined search list: ~A"
1443     (search-list-name search-list)))
1444     (t
1445     (let ((tail (cddr (pathname-directory pathname))))
1446     (dolist (expansion
1447     (search-list-expansions search-list))
1448     (%enumerate-search-list (make-pathname :defaults pathname
1449     :directory
1450     (cons :absolute
1451     (append expansion
1452     tail)))
1453     function)))))))
1454 phg 1.12
1455    
1456     ;;;; Logical pathname support. ANSI 92-102 specification.
1457 phg 1.16 ;;;; As logical-pathname translations are loaded they are canonicalized as
1458     ;;;; patterns to enable rapid efficent translation into physical pathnames.
1459 phg 1.12
1460 ram 1.17 ;;;; Utilities:
1461 phg 1.12
1462 ram 1.17 ;;; LOGICAL-WORD-OR-LOSE -- Internal
1463 phg 1.13 ;;;
1464 ram 1.17 ;;; Canonicalize a logical pathanme word by uppercasing it checking that it
1465     ;;; contains only legal characters.
1466 phg 1.16 ;;;
1467 ram 1.17 (defun logical-word-or-lose (word)
1468     (declare (string word))
1469     (let ((word (string-upcase word)))
1470     (dotimes (i (length word))
1471     (let ((ch (schar word i)))
1472     (unless (or (alpha-char-p ch) (digit-char-p ch) (char= ch #\-))
1473     (error 'namestring-parse-error
1474     :complaint "Logical namestring character ~
1475     is not alphanumeric or hyphen:~% ~S"
1476     :arguments (list ch)
1477     :namestring word :offset i))))
1478     word))
1479 phg 1.12
1480 ram 1.17
1481     ;;; FIND-LOGICAL-HOST -- Internal
1482     ;;;
1483     ;;; Given a logical host or string, return a logical host. If Error-p is
1484     ;;; NIL, then return NIL when no such host exists.
1485     ;;;
1486     (defun find-logical-host (thing &optional (errorp t))
1487     (etypecase thing
1488     (string
1489     (let ((found (gethash (logical-word-or-lose thing)
1490     *logical-hosts*)))
1491     (if (or found (not errorp))
1492     found
1493 dtc 1.34 (error 'simple-file-error
1494     :pathname thing
1495     :format-control "Logical host not yet defined: ~S"
1496     :format-arguments (list thing)))))
1497 ram 1.17 (logical-host thing)))
1498    
1499    
1500 phg 1.16 ;;; INTERN-LOGICAL-HOST -- Internal
1501 phg 1.13 ;;;
1502 ram 1.17 ;;; Given a logical host name or host, return a logical host, creating a new
1503     ;;; one if necessary.
1504 phg 1.16 ;;;
1505 ram 1.17 (defun intern-logical-host (thing)
1506     (declare (values logical-host))
1507     (or (find-logical-host thing nil)
1508     (let* ((name (logical-word-or-lose thing))
1509     (new (make-logical-host :name name)))
1510 phg 1.16 (setf (gethash name *logical-hosts*) new)
1511     new)))
1512 phg 1.12
1513 ram 1.17
1514     ;;;; Logical pathname parsing:
1515    
1516     ;;; MAYBE-MAKE-LOGICAL-PATTERN -- Internal
1517 phg 1.13 ;;;
1518 ram 1.17 ;;; Deal with multi-char wildcards in a logical pathname token.
1519 phg 1.16 ;;;
1520 ram 1.17 (defun maybe-make-logical-pattern (namestring chunks)
1521     (let ((chunk (caar chunks)))
1522     (collect ((pattern))
1523     (let ((last-pos 0)
1524     (len (length chunk)))
1525     (declare (fixnum last-pos))
1526     (loop
1527     (when (= last-pos len) (return))
1528     (let ((pos (or (position #\* chunk :start last-pos) len)))
1529     (if (= pos last-pos)
1530     (when (pattern)
1531     (error 'namestring-parse-error
1532     :complaint "Double asterisk inside of logical ~
1533     word: ~S"
1534     :arguments (list chunk)
1535     :namestring namestring
1536     :offset (+ (cdar chunks) pos)))
1537     (pattern (subseq chunk last-pos pos)))
1538     (if (= pos len)
1539     (return)
1540     (pattern :multi-char-wild))
1541     (setq last-pos (1+ pos)))))
1542     (assert (pattern))
1543     (if (cdr (pattern))
1544     (make-pattern (pattern))
1545     (let ((x (car (pattern))))
1546     (if (eq x :multi-char-wild)
1547     :wild
1548     x))))))
1549 phg 1.12
1550 ram 1.17
1551     ;;; LOGICAL-CHUNKIFY -- Internal
1552 phg 1.13 ;;;
1553 ram 1.17 ;;; Return a list of conses where the cdr is the start position and the car
1554     ;;; is a string (token) or character (punctuation.)
1555 phg 1.13 ;;;
1556 ram 1.17 (defun logical-chunkify (namestr start end)
1557     (collect ((chunks))
1558     (do ((i start (1+ i))
1559     (prev 0))
1560     ((= i end)
1561     (when (> end prev)
1562     (chunks (cons (nstring-upcase (subseq namestr prev end)) prev))))
1563     (let ((ch (schar namestr i)))
1564     (unless (or (alpha-char-p ch) (digit-char-p ch)
1565     (member ch '(#\- #\*)))
1566     (when (> i prev)
1567     (chunks (cons (nstring-upcase (subseq namestr prev i)) prev)))
1568     (setq prev (1+ i))
1569     (unless (member ch '(#\; #\: #\.))
1570     (error 'namestring-parse-error
1571     :complaint "Illegal character for logical pathname:~% ~S"
1572     :arguments (list ch)
1573     :namestring namestr
1574     :offset i))
1575     (chunks (cons ch i)))))
1576     (chunks)))
1577 phg 1.12
1578    
1579 phg 1.13 ;;; PARSE-LOGICAL-NAMESTRING -- Internal
1580     ;;;
1581 phg 1.16 ;;; Break up a logical-namestring, always a string, into its constituent
1582     ;;; parts.
1583 phg 1.13 ;;;
1584 ram 1.17 (defun parse-logical-namestring (namestr start end)
1585 phg 1.12 (declare (type simple-base-string namestr)
1586 ram 1.17 (type index start end))
1587     (collect ((directory))
1588     (let ((host nil)
1589     (name nil)
1590     (type nil)
1591     (version nil))
1592     (labels ((expecting (what chunks)
1593     (unless (and chunks (simple-string-p (caar chunks)))
1594     (error 'namestring-parse-error
1595     :complaint "Expecting ~A, got ~:[nothing~;~S~]."
1596     :arguments (list what (caar chunks))
1597     :namestring namestr
1598     :offset (if chunks (cdar chunks) end)))
1599     (caar chunks))
1600     (parse-host (chunks)
1601     (case (caadr chunks)
1602     (#\:
1603     (setq host
1604     (find-logical-host (expecting "a host name" chunks)))
1605     (parse-relative (cddr chunks)))
1606     (t
1607     (parse-relative chunks))))
1608     (parse-relative (chunks)
1609     (case (caar chunks)
1610     (#\;
1611     (directory :relative)
1612     (parse-directory (cdr chunks)))
1613     (t
1614 pw 1.30 (directory :absolute) ; Assumption! Maybe revoked later.
1615 ram 1.17 (parse-directory chunks))))
1616     (parse-directory (chunks)
1617     (case (caadr chunks)
1618     (#\;
1619     (directory
1620     (let ((res (expecting "a directory name" chunks)))
1621     (cond ((string= res "..") :up)
1622     ((string= res "**") :wild-inferiors)
1623     (t
1624     (maybe-make-logical-pattern namestr chunks)))))
1625     (parse-directory (cddr chunks)))
1626     (t
1627     (parse-name chunks))))
1628     (parse-name (chunks)
1629     (when chunks
1630     (expecting "a file name" chunks)
1631     (setq name (maybe-make-logical-pattern namestr chunks))
1632     (expecting-dot (cdr chunks))))
1633     (expecting-dot (chunks)
1634     (when chunks
1635     (unless (eql (caar chunks) #\.)
1636     (error 'namestring-parse-error
1637     :complaint "Expecting a dot, got ~S."
1638     :arguments (list (caar chunks))
1639     :namestring namestr
1640     :offset (cdar chunks)))
1641     (if type
1642     (parse-version (cdr chunks))
1643     (parse-type (cdr chunks)))))
1644     (parse-type (chunks)
1645     (expecting "a file type" chunks)
1646     (setq type (maybe-make-logical-pattern namestr chunks))
1647     (expecting-dot (cdr chunks)))
1648     (parse-version (chunks)
1649     (let ((str (expecting "a positive integer, * or NEWEST"
1650     chunks)))
1651     (cond
1652     ((string= str "*") (setq version :wild))
1653     ((string= str "NEWEST") (setq version :newest))
1654     (t
1655     (multiple-value-bind
1656     (res pos)
1657     (parse-integer str :junk-allowed t)
1658     (unless (and res (plusp res))
1659     (error 'namestring-parse-error
1660     :complaint "Expected a positive integer, ~
1661     got ~S"
1662     :arguments (list str)
1663     :namestring namestr
1664     :offset (+ pos (cdar chunks))))
1665     (setq version res)))))
1666     (when (cdr chunks)
1667     (error 'namestring-parse-error
1668     :complaint "Extra stuff after end of file name."
1669     :namestring namestr
1670     :offset (cdadr chunks)))))
1671     (parse-host (logical-chunkify namestr start end)))
1672 pw 1.30 (values host :unspecific
1673     (and (not (equal (directory)'(:absolute)))(directory))
1674     name type version))))
1675 phg 1.12
1676 ram 1.17
1677     ;;; Can't defvar here because not all host methods are loaded yet.
1678     (declaim (special *logical-pathname-defaults*))
1679    
1680     ;;; LOGICAL-PATHNAME -- Public
1681 phg 1.13 ;;;
1682 ram 1.17 (defun logical-pathname (pathspec)
1683     "Converts the pathspec argument to a logical-pathname and returns it."
1684     (declare (type (or logical-pathname string stream) pathspec)
1685     (values logical-pathname))
1686     (if (typep pathspec 'logical-pathname)
1687     pathspec
1688     (let ((res (parse-namestring pathspec nil *logical-pathname-defaults*)))
1689     (when (eq (%pathname-host res)
1690     (%pathname-host *logical-pathname-defaults*))
1691     (error "Logical namestring does not specify a host:~% ~S"
1692     pathspec))
1693     res)))
1694 phg 1.12
1695 ram 1.17
1696     ;;;; Logical pathname unparsing:
1697    
1698 phg 1.13 ;;; UNPARSE-LOGICAL-DIRECTORY -- Internal
1699     ;;;
1700 phg 1.12 (defun unparse-logical-directory (pathname)
1701 ram 1.17 (declare (type pathname pathname))
1702     (collect ((pieces))
1703     (let ((directory (%pathname-directory pathname)))
1704     (when directory
1705     (ecase (pop directory)
1706     (:absolute) ;; Nothing special.
1707     (:relative (pieces ";")))
1708     (dolist (dir directory)
1709     (cond ((or (stringp dir) (pattern-p dir))
1710     (pieces (unparse-logical-piece dir))
1711     (pieces ";"))
1712     ((eq dir :wild)
1713     (pieces "*;"))
1714     ((eq dir :wild-inferiors)
1715     (pieces "**;"))
1716     (t
1717     (error "Invalid directory component: ~S" dir))))))
1718     (apply #'concatenate 'simple-string (pieces))))
1719 phg 1.12
1720 ram 1.17
1721 phg 1.13 ;;; UNPARSE-LOGICAL-PIECE -- Internal
1722     ;;;
1723 phg 1.12 (defun unparse-logical-piece (thing)
1724     (etypecase thing
1725 ram 1.17 (simple-string thing)
1726 phg 1.12 (pattern
1727     (collect ((strings))
1728 ram 1.17 (dolist (piece (pattern-pieces thing))
1729     (etypecase piece
1730     (simple-string (strings piece))
1731     (keyword
1732     (cond ((eq piece :wild-inferiors)
1733     (strings "**"))
1734     ((eq piece :multi-char-wild)
1735     (strings "*"))
1736     (t (error "Invalid keyword: ~S" piece))))))
1737     (apply #'concatenate 'simple-string (strings))))))
1738 phg 1.12
1739 dtc 1.36 ;;; UNPARSE-ENOUGH-NAMESTRING -- Internal
1740     ;;;
1741     (defun unparse-enough-namestring (pathname defaults)
1742     (let* ((path-dir (pathname-directory pathname))
1743     (def-dir (pathname-directory defaults))
1744     (enough-dir
1745     ;; Go down the directory lists to see what matches. What's
1746     ;; left is what we want, more or less.
1747     (cond ((and (eq (first path-dir) (first def-dir))
1748     (eq (first path-dir) :absolute))
1749     ;; Both paths are :absolute, so find where the common
1750     ;; parts end and return what's left
1751     (do* ((p (rest path-dir) (rest p))
1752     (d (rest def-dir) (rest d)))
1753     ((or (endp p) (endp d)
1754     (not (equal (first p) (first d))))
1755     `(:relative ,@p))))
1756     (t
1757     ;; At least one path is :relative, so just return the
1758     ;; original path. If the original path is :relative,
1759     ;; then that's the right one. If PATH-DIR is
1760     ;; :absolute, we want to return that except when
1761     ;; DEF-DIR is :absolute, as handled above. so return
1762     ;; the original directory.
1763     path-dir))))
1764     (make-pathname :host (pathname-host pathname)
1765     :directory enough-dir
1766     :name (pathname-name pathname)
1767     :type (pathname-type pathname)
1768     :version (pathname-version pathname))))
1769 phg 1.12
1770 phg 1.13 ;;; UNPARSE-LOGICAL-NAMESTRING -- Internal
1771     ;;;
1772 phg 1.12 (defun unparse-logical-namestring (pathname)
1773     (declare (type logical-pathname pathname))
1774     (concatenate 'simple-string
1775 ram 1.17 (logical-host-name (%pathname-host pathname)) ":"
1776 phg 1.12 (unparse-logical-directory pathname)
1777 ram 1.17 (unparse-unix-file pathname)))
1778 phg 1.12
1779 ram 1.17
1780     ;;;; Logical pathname translations:
1781 phg 1.12
1782 ram 1.17 ;;; CANONICALIZE-LOGICAL-PATHNAME-TRANSLATIONS -- Internal
1783 phg 1.13 ;;;
1784     ;;; Verify that the list of translations consists of lists and prepare
1785 phg 1.16 ;;; canonical translations (parse pathnames and expand out wildcards into
1786     ;;; patterns).
1787 phg 1.13 ;;;
1788 ram 1.17 (defun canonicalize-logical-pathname-translations (transl-list host)
1789     (declare (type list transl-list) (type host host)
1790     (values list))
1791     (collect ((res))
1792     (dolist (tr transl-list)
1793     (unless (and (consp tr) (= (length tr) 2))
1794     (error "Logical pathname translation is not a two-list:~% ~S"
1795     tr))
1796     (let ((from (first tr)))
1797     (res (list (if (typep from 'logical-pathname)
1798     from
1799     (parse-namestring from host))
1800     (pathname (second tr))))))
1801     (res)))
1802 phg 1.12
1803 ram 1.17
1804 phg 1.13 ;;; LOGICAL-PATHNAME-TRANSLATIONS -- Public
1805     ;;;
1806 phg 1.12 (defun logical-pathname-translations (host)
1807     "Return the (logical) host object argument's list of translations."
1808 ram 1.17 (declare (type (or string logical-host) host)
1809 phg 1.12 (values list))
1810 ram 1.17 (logical-host-translations (find-logical-host host)))
1811 phg 1.12
1812 ram 1.17
1813 phg 1.13 ;;; (SETF LOGICAL-PATHNAME-TRANSLATIONS) -- Public
1814     ;;;
1815 phg 1.12 (defun (setf logical-pathname-translations) (translations host)
1816     "Set the translations list for the logical host argument.
1817     Return translations."
1818 ram 1.17 (declare (type (or string logical-host) host)
1819 phg 1.12 (type list translations)
1820     (values list))
1821    
1822 ram 1.17 (let ((host (intern-logical-host host)))
1823     (setf (logical-host-canon-transls host)
1824     (canonicalize-logical-pathname-translations translations host))
1825     (setf (logical-host-translations host) translations)))
1826    
1827    
1828 phg 1.12 ;;; The search mechanism for loading pathname translations uses the CMUCL
1829     ;;; extension of search-lists. The user can add to the library: search-list
1830     ;;; using setf. The file for translations should have the name defined by
1831 phg 1.14 ;;; the hostname (a string) and with type component "translations".
1832 phg 1.12
1833 phg 1.13 ;;; LOAD-LOGICAL-PATHNAME-TRANSLATIONS -- Public
1834     ;;;
1835 phg 1.12 (defun load-logical-pathname-translations (host)
1836     "Search for a logical pathname named host, if not already defined. If already
1837     defined no attempt to find or load a definition is attempted and NIL is
1838     returned. If host is not already defined, but definition is found and loaded
1839     successfully, T is returned, else error."
1840 ram 1.17 (declare (type string host)
1841     (values (member t nil)))
1842     (unless (find-logical-host host nil)
1843     (with-open-file (in-str (make-pathname :defaults "library:"
1844     :name host
1845     :type "translations"))
1846 ram 1.27 (if *load-verbose*
1847     (format *error-output*
1848     ";; Loading pathname translations from ~A~%"
1849     (namestring (truename in-str))))
1850 ram 1.17 (setf (logical-pathname-translations host) (read in-str)))
1851     t))
1852 phg 1.12
1853    
1854 phg 1.13 ;;; TRANSLATE-LOGICAL-PATHNAME -- Public
1855     ;;;
1856 phg 1.12 (defun translate-logical-pathname (pathname &key)
1857     "Translates pathname to a physical pathname, which is returned."
1858 phg 1.16 (declare (type path-designator pathname)
1859     (values (or null pathname)))
1860 ram 1.17 (typecase pathname
1861     (logical-pathname
1862     (dolist (x (logical-host-canon-transls (%pathname-host pathname))
1863 dtc 1.34 (error 'simple-file-error
1864     :pathname pathname
1865     :format-control "No translation for ~S"
1866     :format-arguments (list pathname)))
1867 ram 1.17 (destructuring-bind (from to) x
1868     (when (pathname-match-p pathname from)
1869     (return (translate-logical-pathname
1870     (translate-pathname pathname from to)))))))
1871     (pathname pathname)
1872 ram 1.22 (stream (translate-logical-pathname (pathname pathname)))
1873 ram 1.17 (t (translate-logical-pathname (logical-pathname pathname)))))
1874 phg 1.12
1875 ram 1.17 (defvar *logical-pathname-defaults*
1876     (%make-logical-pathname (make-logical-host :name "BOGUS") :unspecific
1877     nil nil nil nil))

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