1 ;;;; streams for UNIX file descriptors
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; This software is derived from the CMU CL system, which was
7 ;;;; written at Carnegie Mellon University and released into the
8 ;;;; public domain. The software is in the public domain and is
9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
10 ;;;; files for more information.
12 (in-package "SB!IMPL")
14 ;;;; buffer manipulation routines
16 ;;; FIXME: Is it really good to maintain this pool separate from the
17 ;;; GC and the C malloc logic?
18 (defvar *available-buffers* ()
20 "List of available buffers. Each buffer is an sap pointing to
21 bytes-per-buffer of memory.")
23 (defconstant bytes-per-buffer (* 4 1024)
25 "Number of bytes per buffer.")
27 ;;; Return the next available buffer, creating one if necessary.
28 #!-sb-fluid (declaim (inline next-available-buffer))
29 (defun next-available-buffer ()
30 (if *available-buffers*
31 (pop *available-buffers*)
32 (allocate-system-memory bytes-per-buffer)))
34 ;;;; the FD-STREAM structure
37 (:constructor %make-fd-stream)
38 (:conc-name fd-stream-)
39 (:predicate fd-stream-p)
41 (misc #'fd-stream-misc-routine))
44 ;; the name of this stream
46 ;; the file this stream is for
48 ;; the backup file namestring for the old file, for :IF-EXISTS
49 ;; :RENAME or :RENAME-AND-DELETE.
50 (original nil :type (or simple-string null))
51 (delete-original nil) ; for :if-exists :rename-and-delete
52 ;;; the number of bytes per element
53 (element-size 1 :type index)
54 ;; the type of element being transfered
55 (element-type 'base-char)
56 ;; the Unix file descriptor
58 ;; controls when the output buffer is flushed
59 (buffering :full :type (member :full :line :none))
60 ;; character position (if known)
61 (char-pos nil :type (or index null))
62 ;; T if input is waiting on FD. :EOF if we hit EOF.
63 (listen nil :type (member nil t :eof))
67 (ibuf-sap nil :type (or system-area-pointer null))
68 (ibuf-length nil :type (or index null))
69 (ibuf-head 0 :type index)
70 (ibuf-tail 0 :type index)
73 (obuf-sap nil :type (or system-area-pointer null))
74 (obuf-length nil :type (or index null))
75 (obuf-tail 0 :type index)
77 ;; output flushed, but not written due to non-blocking io?
80 ;; timeout specified for this stream, or NIL if none
81 (timeout nil :type (or index null))
82 ;; pathname of the file this stream is opened to (returned by PATHNAME)
83 (pathname nil :type (or pathname null))
84 (external-format :default)
85 (output-bytes #'ill-out :type function))
86 (def!method print-object ((fd-stream fd-stream) stream)
87 (declare (type stream stream))
88 (print-unreadable-object (fd-stream stream :type t :identity t)
89 (format stream "for ~S" (fd-stream-name fd-stream))))
91 ;;;; output routines and related noise
93 (defvar *output-routines* ()
95 "List of all available output routines. Each element is a list of the
96 element-type output, the kind of buffering, the function name, and the number
97 of bytes per element.")
99 ;;; common idioms for reporting low-level stream and file problems
100 (defun simple-stream-perror (note-format stream errno)
101 (error 'simple-stream-error
103 :format-control "~@<~?: ~2I~_~A~:>"
104 :format-arguments (list note-format (list stream) (strerror errno))))
105 (defun simple-file-perror (note-format pathname errno)
106 (error 'simple-file-error
108 :format-control "~@<~?: ~2I~_~A~:>"
110 (list note-format (list pathname) (strerror errno))))
112 (defun stream-decoding-error (stream octets)
113 (error 'stream-decoding-error
115 ;; FIXME: dunno how to get at OCTETS currently, or even if
116 ;; that's the right thing to report.
118 (defun stream-encoding-error (stream code)
119 (error 'stream-encoding-error
123 ;;; This is called by the server when we can write to the given file
124 ;;; descriptor. Attempt to write the data again. If it worked, remove
125 ;;; the data from the OUTPUT-LATER list. If it didn't work, something
127 (defun frob-output-later (stream)
128 (let* ((stuff (pop (fd-stream-output-later stream)))
132 (reuse-sap (cadddr stuff))
133 (length (- end start)))
134 (declare (type index start end length))
135 (multiple-value-bind (count errno)
136 (sb!unix:unix-write (fd-stream-fd stream)
141 (if (= errno sb!unix:ewouldblock)
142 (error "Write would have blocked, but SERVER told us to go.")
143 (simple-stream-perror "couldn't write to ~S" stream errno)))
144 ((eql count length) ; Hot damn, it worked.
146 (push base *available-buffers*)))
147 ((not (null count)) ; sorta worked..
149 (the index (+ start count))
151 (fd-stream-output-later stream))))))
152 (unless (fd-stream-output-later stream)
153 (sb!sys:remove-fd-handler (fd-stream-handler stream))
154 (setf (fd-stream-handler stream) nil)))
156 ;;; Arange to output the string when we can write on the file descriptor.
157 (defun output-later (stream base start end reuse-sap)
158 (cond ((null (fd-stream-output-later stream))
159 (setf (fd-stream-output-later stream)
160 (list (list base start end reuse-sap)))
161 (setf (fd-stream-handler stream)
162 (sb!sys:add-fd-handler (fd-stream-fd stream)
165 (declare (ignore fd))
166 (frob-output-later stream)))))
168 (nconc (fd-stream-output-later stream)
169 (list (list base start end reuse-sap)))))
171 (let ((new-buffer (next-available-buffer)))
172 (setf (fd-stream-obuf-sap stream) new-buffer)
173 (setf (fd-stream-obuf-length stream) bytes-per-buffer))))
175 ;;; Output the given noise. Check to see whether there are any pending
176 ;;; writes. If so, just queue this one. Otherwise, try to write it. If
177 ;;; this would block, queue it.
178 (defun frob-output (stream base start end reuse-sap)
179 (declare (type fd-stream stream)
180 (type (or system-area-pointer (simple-array * (*))) base)
181 (type index start end))
182 (if (not (null (fd-stream-output-later stream))) ; something buffered.
184 (output-later stream base start end reuse-sap)
185 ;; ### check to see whether any of this noise can be output
187 (let ((length (- end start)))
188 (multiple-value-bind (count errno)
189 (sb!unix:unix-write (fd-stream-fd stream) base start length)
191 (if (= errno sb!unix:ewouldblock)
192 (output-later stream base start end reuse-sap)
193 (simple-stream-perror "couldn't write to ~S"
196 ((not (eql count length))
197 (output-later stream base (the index (+ start count))
200 ;;; Flush any data in the output buffer.
201 (defun flush-output-buffer (stream)
202 (let ((length (fd-stream-obuf-tail stream)))
204 (frob-output stream (fd-stream-obuf-sap stream) 0 length t)
205 (setf (fd-stream-obuf-tail stream) 0))))
207 (defmacro output-wrapper/variable-width ((stream size buffering restart)
209 (let ((stream-var (gensym)))
210 `(let ((,stream-var ,stream)
212 ,(unless (eq (car buffering) :none)
213 `(when (< (fd-stream-obuf-length ,stream-var)
214 (+ (fd-stream-obuf-tail ,stream-var)
216 (flush-output-buffer ,stream-var)))
217 ,(unless (eq (car buffering) :none)
218 `(when (> (fd-stream-ibuf-tail ,stream-var)
219 (fd-stream-ibuf-head ,stream-var))
220 (file-position ,stream-var (file-position ,stream-var))))
223 `(with-simple-restart (output-nothing
224 "~@<Skip output of this character.~@:>")
226 (incf (fd-stream-obuf-tail ,stream-var) size))
229 (incf (fd-stream-obuf-tail ,stream-var) size)))
230 ,(ecase (car buffering)
232 `(flush-output-buffer ,stream-var))
234 `(when (eq (char-code byte) (char-code #\Newline))
235 (flush-output-buffer ,stream-var)))
239 (defmacro output-wrapper ((stream size buffering restart) &body body)
240 (let ((stream-var (gensym)))
241 `(let ((,stream-var ,stream))
242 ,(unless (eq (car buffering) :none)
243 `(when (< (fd-stream-obuf-length ,stream-var)
244 (+ (fd-stream-obuf-tail ,stream-var)
246 (flush-output-buffer ,stream-var)))
247 ,(unless (eq (car buffering) :none)
248 `(when (> (fd-stream-ibuf-tail ,stream-var)
249 (fd-stream-ibuf-head ,stream-var))
250 (file-position ,stream-var (file-position ,stream-var))))
252 `(with-simple-restart (output-nothing
253 "~@<Skip output of this character.~@:>")
255 (incf (fd-stream-obuf-tail ,stream-var) ,size))
258 (incf (fd-stream-obuf-tail ,stream-var) ,size)))
259 ,(ecase (car buffering)
261 `(flush-output-buffer ,stream-var))
263 `(when (eq (char-code byte) (char-code #\Newline))
264 (flush-output-buffer ,stream-var)))
268 (defmacro def-output-routines/variable-width
269 ((name-fmt size restart external-format &rest bufferings)
271 (declare (optimize (speed 1)))
276 (intern (let ((*print-case* :upcase))
277 (format nil name-fmt (car buffering))))))
279 (defun ,function (stream byte)
280 (output-wrapper/variable-width (stream ,size ,buffering ,restart)
282 (setf *output-routines*
283 (nconc *output-routines*
291 (cdr buffering)))))))
294 ;;; Define output routines that output numbers SIZE bytes long for the
295 ;;; given bufferings. Use BODY to do the actual output.
296 (defmacro def-output-routines ((name-fmt size restart &rest bufferings)
298 (declare (optimize (speed 1)))
303 (intern (let ((*print-case* :upcase))
304 (format nil name-fmt (car buffering))))))
306 (defun ,function (stream byte)
307 (output-wrapper (stream ,size ,buffering ,restart)
309 (setf *output-routines*
310 (nconc *output-routines*
318 (cdr buffering)))))))
321 ;;; FIXME: is this used anywhere any more?
322 (def-output-routines ("OUTPUT-CHAR-~A-BUFFERED"
328 (if (char= byte #\Newline)
329 (setf (fd-stream-char-pos stream) 0)
330 (incf (fd-stream-char-pos stream)))
331 (setf (sap-ref-8 (fd-stream-obuf-sap stream) (fd-stream-obuf-tail stream))
334 (def-output-routines ("OUTPUT-UNSIGNED-BYTE-~A-BUFFERED"
337 (:none (unsigned-byte 8))
338 (:full (unsigned-byte 8)))
339 (setf (sap-ref-8 (fd-stream-obuf-sap stream) (fd-stream-obuf-tail stream))
342 (def-output-routines ("OUTPUT-SIGNED-BYTE-~A-BUFFERED"
345 (:none (signed-byte 8))
346 (:full (signed-byte 8)))
347 (setf (signed-sap-ref-8 (fd-stream-obuf-sap stream)
348 (fd-stream-obuf-tail stream))
351 (def-output-routines ("OUTPUT-UNSIGNED-SHORT-~A-BUFFERED"
354 (:none (unsigned-byte 16))
355 (:full (unsigned-byte 16)))
356 (setf (sap-ref-16 (fd-stream-obuf-sap stream) (fd-stream-obuf-tail stream))
359 (def-output-routines ("OUTPUT-SIGNED-SHORT-~A-BUFFERED"
362 (:none (signed-byte 16))
363 (:full (signed-byte 16)))
364 (setf (signed-sap-ref-16 (fd-stream-obuf-sap stream)
365 (fd-stream-obuf-tail stream))
368 (def-output-routines ("OUTPUT-UNSIGNED-LONG-~A-BUFFERED"
371 (:none (unsigned-byte 32))
372 (:full (unsigned-byte 32)))
373 (setf (sap-ref-32 (fd-stream-obuf-sap stream) (fd-stream-obuf-tail stream))
376 (def-output-routines ("OUTPUT-SIGNED-LONG-~A-BUFFERED"
379 (:none (signed-byte 32))
380 (:full (signed-byte 32)))
381 (setf (signed-sap-ref-32 (fd-stream-obuf-sap stream)
382 (fd-stream-obuf-tail stream))
385 ;;; Do the actual output. If there is space to buffer the string,
386 ;;; buffer it. If the string would normally fit in the buffer, but
387 ;;; doesn't because of other stuff in the buffer, flush the old noise
388 ;;; out of the buffer and put the string in it. Otherwise we have a
389 ;;; very long string, so just send it directly (after flushing the
390 ;;; buffer, of course).
391 (defun output-raw-bytes (fd-stream thing &optional start end)
393 "Output THING to FD-STREAM. THING can be any kind of vector or a SAP. If
394 THING is a SAP, END must be supplied (as length won't work)."
395 (let ((start (or start 0))
396 (end (or end (length (the (simple-array * (*)) thing)))))
397 (declare (type index start end))
398 (when (> (fd-stream-ibuf-tail fd-stream)
399 (fd-stream-ibuf-head fd-stream))
400 (file-position fd-stream (file-position fd-stream)))
401 (let* ((len (fd-stream-obuf-length fd-stream))
402 (tail (fd-stream-obuf-tail fd-stream))
404 (bytes (- end start))
405 (newtail (+ tail bytes)))
406 (cond ((minusp bytes) ; error case
407 (error ":END before :START!"))
408 ((zerop bytes)) ; easy case
410 (if (system-area-pointer-p thing)
411 (system-area-ub8-copy thing start
412 (fd-stream-obuf-sap fd-stream)
415 ;; FIXME: There should be some type checking somewhere to
416 ;; verify that THING here is a vector, not just <not a SAP>.
417 (copy-ub8-to-system-area thing start
418 (fd-stream-obuf-sap fd-stream)
421 (setf (fd-stream-obuf-tail fd-stream) newtail))
423 (flush-output-buffer fd-stream)
424 (if (system-area-pointer-p thing)
425 (system-area-ub8-copy thing
427 (fd-stream-obuf-sap fd-stream)
430 ;; FIXME: There should be some type checking somewhere to
431 ;; verify that THING here is a vector, not just <not a SAP>.
432 (copy-ub8-to-system-area thing
434 (fd-stream-obuf-sap fd-stream)
437 (setf (fd-stream-obuf-tail fd-stream) bytes))
439 (flush-output-buffer fd-stream)
440 (frob-output fd-stream thing start end nil))))))
442 ;;; the routine to use to output a string. If the stream is
443 ;;; unbuffered, slam the string down the file descriptor, otherwise
444 ;;; use OUTPUT-RAW-BYTES to buffer the string. Update charpos by
445 ;;; checking to see where the last newline was.
447 ;;; Note: some bozos (the FASL dumper) call write-string with things
448 ;;; other than strings. Therefore, we must make sure we have a string
449 ;;; before calling POSITION on it.
450 ;;; KLUDGE: It would be better to fix the bozos instead of trying to
451 ;;; cover for them here. -- WHN 20000203
452 (defun fd-sout (stream thing start end)
453 (let ((start (or start 0))
454 (end (or end (length (the vector thing)))))
455 (declare (fixnum start end))
457 (let ((last-newline (and (find #\newline (the simple-string thing)
458 :start start :end end)
459 ;; FIXME why do we need both calls?
460 ;; Is find faster forwards than
461 ;; position is backwards?
462 (position #\newline (the simple-string thing)
466 (if (and (typep thing 'base-string)
467 (eq (fd-stream-external-format stream) :latin-1))
468 (ecase (fd-stream-buffering stream)
470 (output-raw-bytes stream thing start end))
472 (output-raw-bytes stream thing start end)
474 (flush-output-buffer stream)))
476 (frob-output stream thing start end nil)))
477 (ecase (fd-stream-buffering stream)
478 (:full (funcall (fd-stream-output-bytes stream)
479 stream thing nil start end))
480 (:line (funcall (fd-stream-output-bytes stream)
481 stream thing last-newline start end))
482 (:none (funcall (fd-stream-output-bytes stream)
483 stream thing t start end))))
485 (setf (fd-stream-char-pos stream)
486 (- end last-newline 1))
487 (incf (fd-stream-char-pos stream)
489 (ecase (fd-stream-buffering stream)
491 (output-raw-bytes stream thing start end))
493 (frob-output stream thing start end nil))))))
495 (defvar *external-formats* ()
497 "List of all available external formats. Each element is a list of the
498 element-type, string input function name, character input function name,
499 and string output function name.")
501 ;;; Find an output routine to use given the type and buffering. Return
502 ;;; as multiple values the routine, the real type transfered, and the
503 ;;; number of bytes per element.
504 (defun pick-output-routine (type buffering &optional external-format)
505 (when (subtypep type 'character)
506 (dolist (entry *external-formats*)
507 (when (member external-format (first entry))
508 (return-from pick-output-routine
509 (values (symbol-function (nth (ecase buffering
516 (symbol-function (fourth entry))
517 (first (first entry)))))))
518 (dolist (entry *output-routines*)
519 (when (and (subtypep type (first entry))
520 (eq buffering (second entry))
521 (or (not (fifth entry))
522 (eq external-format (fifth entry))))
523 (return-from pick-output-routine
524 (values (symbol-function (third entry))
527 ;; KLUDGE: dealing with the buffering here leads to excessive code
530 ;; KLUDGE: also see comments in PICK-INPUT-ROUTINE
531 (loop for i from 40 by 8 to 1024 ; ARB (KLUDGE)
532 if (subtypep type `(unsigned-byte ,i))
533 do (return-from pick-output-routine
537 (lambda (stream byte)
538 (output-wrapper (stream (/ i 8) (:none) nil)
539 (loop for j from 0 below (/ i 8)
541 (fd-stream-obuf-sap stream)
542 (+ j (fd-stream-obuf-tail stream)))
543 (ldb (byte 8 (- i 8 (* j 8))) byte))))))
545 (lambda (stream byte)
546 (output-wrapper (stream (/ i 8) (:full) nil)
547 (loop for j from 0 below (/ i 8)
549 (fd-stream-obuf-sap stream)
550 (+ j (fd-stream-obuf-tail stream)))
551 (ldb (byte 8 (- i 8 (* j 8))) byte)))))))
554 (loop for i from 40 by 8 to 1024 ; ARB (KLUDGE)
555 if (subtypep type `(signed-byte ,i))
556 do (return-from pick-output-routine
560 (lambda (stream byte)
561 (output-wrapper (stream (/ i 8) (:none) nil)
562 (loop for j from 0 below (/ i 8)
564 (fd-stream-obuf-sap stream)
565 (+ j (fd-stream-obuf-tail stream)))
566 (ldb (byte 8 (- i 8 (* j 8))) byte))))))
568 (lambda (stream byte)
569 (output-wrapper (stream (/ i 8) (:full) nil)
570 (loop for j from 0 below (/ i 8)
572 (fd-stream-obuf-sap stream)
573 (+ j (fd-stream-obuf-tail stream)))
574 (ldb (byte 8 (- i 8 (* j 8))) byte)))))))
578 ;;;; input routines and related noise
580 ;;; a list of all available input routines. Each element is a list of
581 ;;; the element-type input, the function name, and the number of bytes
583 (defvar *input-routines* ())
585 ;;; Fill the input buffer, and return the first character. Throw to
586 ;;; EOF-INPUT-CATCHER if the eof was reached. Drop into SYSTEM:SERVER
588 (defun frob-input (stream)
589 (let ((fd (fd-stream-fd stream))
590 (ibuf-sap (fd-stream-ibuf-sap stream))
591 (buflen (fd-stream-ibuf-length stream))
592 (head (fd-stream-ibuf-head stream))
593 (tail (fd-stream-ibuf-tail stream)))
594 (declare (type index head tail))
596 (cond ((eql head tail)
599 (setf (fd-stream-ibuf-head stream) 0)
600 (setf (fd-stream-ibuf-tail stream) 0))
603 (system-area-ub8-copy ibuf-sap head
606 (setf (fd-stream-ibuf-head stream) 0)
607 (setf (fd-stream-ibuf-tail stream) tail))))
608 (setf (fd-stream-listen stream) nil)
609 (multiple-value-bind (count errno)
610 ;; FIXME: Judging from compiler warnings, this WITH-ALIEN form expands
611 ;; into something which uses the not-yet-defined type
612 ;; (SB!ALIEN-INTERNALS:ALIEN (* (SB!ALIEN:STRUCT SB!UNIX:FD-SET))).
613 ;; This is probably inefficient and unsafe and generally bad, so
614 ;; try to find some way to make that type known before
616 (sb!alien:with-alien ((read-fds (sb!alien:struct sb!unix:fd-set)))
617 (sb!unix:fd-zero read-fds)
618 (sb!unix:fd-set fd read-fds)
619 (sb!unix:unix-fast-select (1+ fd)
620 (sb!alien:addr read-fds)
628 (unless (sb!sys:wait-until-fd-usable
629 fd :input (fd-stream-timeout stream))
630 (error 'io-timeout :stream stream :direction :read)))
632 (simple-stream-perror "couldn't check whether ~S is readable"
635 (multiple-value-bind (count errno)
636 (sb!unix:unix-read fd
637 (sb!sys:int-sap (+ (sb!sys:sap-int ibuf-sap) tail))
640 (if (eql errno sb!unix:ewouldblock)
642 (unless (sb!sys:wait-until-fd-usable
643 fd :input (fd-stream-timeout stream))
644 (error 'io-timeout :stream stream :direction :read))
646 (simple-stream-perror "couldn't read from ~S" stream errno)))
648 (setf (fd-stream-listen stream) :eof)
649 (/show0 "THROWing EOF-INPUT-CATCHER")
650 (throw 'eof-input-catcher nil))
652 (incf (fd-stream-ibuf-tail stream) count))))))
654 ;;; Make sure there are at least BYTES number of bytes in the input
655 ;;; buffer. Keep calling FROB-INPUT until that condition is met.
656 (defmacro input-at-least (stream bytes)
657 (let ((stream-var (gensym))
658 (bytes-var (gensym)))
659 `(let ((,stream-var ,stream)
662 (when (>= (- (fd-stream-ibuf-tail ,stream-var)
663 (fd-stream-ibuf-head ,stream-var))
666 (frob-input ,stream-var)))))
668 (defmacro input-wrapper/variable-width ((stream bytes eof-error eof-value
671 (let ((stream-var (gensym))
673 (element-var (gensym)))
674 `(let ((,stream-var ,stream)
676 (if (fd-stream-unread ,stream-var)
678 (fd-stream-unread ,stream-var)
679 (setf (fd-stream-unread ,stream-var) nil)
680 (setf (fd-stream-listen ,stream-var) nil))
681 (let ((,element-var nil))
684 (setq ,retry-var nil)
686 (catch 'eof-input-catcher
688 (block character-decode
689 (input-at-least ,stream-var 1)
690 (let* ((byte (sap-ref-8 (fd-stream-ibuf-sap
695 (input-at-least ,stream-var size)
696 (setq ,element-var (locally ,@read-forms))))
697 (stream-decoding-error
700 (loop for i from 0 below size
701 collect (sap-ref-8 (fd-stream-ibuf-sap
703 (+ (fd-stream-ibuf-head
706 (list (sap-ref-8 (fd-stream-ibuf-sap
711 :report (lambda (stream)
713 "~@<Attempt to resync the stream at a ~
714 character boundary and continue.~@:>"))
715 (,resync-function ,stream-var)
717 (force-end-of-file ()
718 :report (lambda (stream)
720 "~@<Force an end of file.~@:>"))
723 (incf (fd-stream-ibuf-head ,stream-var) size)
726 (eof-or-lose ,stream-var ,eof-error ,eof-value))))))))
728 ;;; a macro to wrap around all input routines to handle EOF-ERROR noise
729 (defmacro input-wrapper ((stream bytes eof-error eof-value) &body read-forms)
730 (let ((stream-var (gensym))
731 (element-var (gensym)))
732 `(let ((,stream-var ,stream))
733 (if (fd-stream-unread ,stream-var)
735 (fd-stream-unread ,stream-var)
736 (setf (fd-stream-unread ,stream-var) nil)
737 (setf (fd-stream-listen ,stream-var) nil))
739 (catch 'eof-input-catcher
740 (input-at-least ,stream-var ,bytes)
741 (locally ,@read-forms))))
743 (incf (fd-stream-ibuf-head ,stream-var) ,bytes)
746 (eof-or-lose ,stream-var ,eof-error ,eof-value))))))))
748 (defmacro def-input-routine/variable-width (name
749 (type external-format size sap head
753 (defun ,name (stream eof-error eof-value)
754 (input-wrapper/variable-width (stream ,size eof-error eof-value
756 (let ((,sap (fd-stream-ibuf-sap stream))
757 (,head (fd-stream-ibuf-head stream)))
759 (setf *input-routines*
760 (nconc *input-routines*
761 (list (list ',type ',name 1 ',external-format))))))
763 (defmacro def-input-routine (name
767 (defun ,name (stream eof-error eof-value)
768 (input-wrapper (stream ,size eof-error eof-value)
769 (let ((,sap (fd-stream-ibuf-sap stream))
770 (,head (fd-stream-ibuf-head stream)))
772 (setf *input-routines*
773 (nconc *input-routines*
774 (list (list ',type ',name ',size nil))))))
776 ;;; STREAM-IN routine for reading a string char
777 (def-input-routine input-character
778 (character 1 sap head)
779 (code-char (sap-ref-8 sap head)))
781 ;;; STREAM-IN routine for reading an unsigned 8 bit number
782 (def-input-routine input-unsigned-8bit-byte
783 ((unsigned-byte 8) 1 sap head)
784 (sap-ref-8 sap head))
786 ;;; STREAM-IN routine for reading a signed 8 bit number
787 (def-input-routine input-signed-8bit-number
788 ((signed-byte 8) 1 sap head)
789 (signed-sap-ref-8 sap head))
791 ;;; STREAM-IN routine for reading an unsigned 16 bit number
792 (def-input-routine input-unsigned-16bit-byte
793 ((unsigned-byte 16) 2 sap head)
794 (sap-ref-16 sap head))
796 ;;; STREAM-IN routine for reading a signed 16 bit number
797 (def-input-routine input-signed-16bit-byte
798 ((signed-byte 16) 2 sap head)
799 (signed-sap-ref-16 sap head))
801 ;;; STREAM-IN routine for reading a unsigned 32 bit number
802 (def-input-routine input-unsigned-32bit-byte
803 ((unsigned-byte 32) 4 sap head)
804 (sap-ref-32 sap head))
806 ;;; STREAM-IN routine for reading a signed 32 bit number
807 (def-input-routine input-signed-32bit-byte
808 ((signed-byte 32) 4 sap head)
809 (signed-sap-ref-32 sap head))
813 ;;; Find an input routine to use given the type. Return as multiple
814 ;;; values the routine, the real type transfered, and the number of
815 ;;; bytes per element (and for character types string input routine).
816 (defun pick-input-routine (type &optional external-format)
817 (when (subtypep type 'character)
818 (dolist (entry *external-formats*)
819 (when (member external-format (first entry))
820 (return-from pick-input-routine
821 (values (symbol-function (third entry))
824 (symbol-function (second entry))
825 (first (first entry)))))))
826 (dolist (entry *input-routines*)
827 (when (and (subtypep type (first entry))
828 (or (not (fourth entry))
829 (eq external-format (fourth entry))))
830 (return-from pick-input-routine
831 (values (symbol-function (second entry))
834 ;; FIXME: let's do it the hard way, then (but ignore things like
835 ;; endianness, efficiency, and the necessary coupling between these
836 ;; and the output routines). -- CSR, 2004-02-09
837 (loop for i from 40 by 8 to 1024 ; ARB (well, KLUDGE really)
838 if (subtypep type `(unsigned-byte ,i))
839 do (return-from pick-input-routine
841 (lambda (stream eof-error eof-value)
842 (input-wrapper (stream (/ i 8) eof-error eof-value)
843 (let ((sap (fd-stream-ibuf-sap stream))
844 (head (fd-stream-ibuf-head stream)))
845 (loop for j from 0 below (/ i 8)
849 (sap-ref-8 sap (+ head j))))
850 finally (return result)))))
853 (loop for i from 40 by 8 to 1024 ; ARB (well, KLUDGE really)
854 if (subtypep type `(signed-byte ,i))
855 do (return-from pick-input-routine
857 (lambda (stream eof-error eof-value)
858 (input-wrapper (stream (/ i 8) eof-error eof-value)
859 (let ((sap (fd-stream-ibuf-sap stream))
860 (head (fd-stream-ibuf-head stream)))
861 (loop for j from 0 below (/ i 8)
865 (sap-ref-8 sap (+ head j))))
866 finally (return (if (logbitp (1- i) result)
867 (dpb result (byte i 0) -1)
872 ;;; Return a string constructed from SAP, START, and END.
873 (defun string-from-sap (sap start end)
874 (declare (type index start end))
875 (let* ((length (- end start))
876 (string (make-string length)))
877 (copy-ub8-from-system-area sap start
882 ;;; the N-BIN method for FD-STREAMs
884 ;;; Note that this blocks in UNIX-READ. It is generally used where
885 ;;; there is a definite amount of reading to be done, so blocking
886 ;;; isn't too problematical.
887 (defun fd-stream-read-n-bytes (stream buffer start requested eof-error-p
888 &aux (total-copied 0))
889 (declare (type fd-stream stream))
890 (declare (type index start requested total-copied))
891 (let ((unread (fd-stream-unread stream)))
893 ;; AVERs designed to fail when we have more complicated
894 ;; character representations.
895 (aver (typep unread 'base-char))
896 (aver (= (fd-stream-element-size stream) 1))
897 ;; KLUDGE: this is a slightly-unrolled-and-inlined version of
901 (setf (sap-ref-8 buffer start) (char-code unread)))
902 ((simple-unboxed-array (*))
903 (setf (aref buffer start) unread)))
904 (setf (fd-stream-unread stream) nil)
905 (setf (fd-stream-listen stream) nil)
906 (incf total-copied)))
909 (let* ((remaining-request (- requested total-copied))
910 (head (fd-stream-ibuf-head stream))
911 (tail (fd-stream-ibuf-tail stream))
912 (available (- tail head))
913 (n-this-copy (min remaining-request available))
914 (this-start (+ start total-copied))
915 (this-end (+ this-start n-this-copy))
916 (sap (fd-stream-ibuf-sap stream)))
917 (declare (type index remaining-request head tail available))
918 (declare (type index n-this-copy))
919 ;; Copy data from stream buffer into user's buffer.
920 (%byte-blt sap head buffer this-start this-end)
921 (incf (fd-stream-ibuf-head stream) n-this-copy)
922 (incf total-copied n-this-copy)
923 ;; Maybe we need to refill the stream buffer.
924 (cond (;; If there were enough data in the stream buffer, we're done.
925 (= total-copied requested)
926 (return total-copied))
927 (;; If EOF, we're done in another way.
928 (zerop (refill-fd-stream-buffer stream))
930 (error 'end-of-file :stream stream)
931 (return total-copied)))
932 ;; Otherwise we refilled the stream buffer, so fall
933 ;; through into another pass of the loop.
936 ;;; Try to refill the stream buffer. Return the number of bytes read.
937 ;;; (For EOF, the return value will be zero, otherwise positive.)
938 (defun refill-fd-stream-buffer (stream)
939 ;; We don't have any logic to preserve leftover bytes in the buffer,
940 ;; so we should only be called when the buffer is empty.
941 ;; FIXME: can have three bytes in buffer because of UTF-8
943 (sap (fd-stream-ibuf-sap stream)))
944 (do ((head (fd-stream-ibuf-head stream) (1+ head))
945 (tail (fd-stream-ibuf-tail stream)))
947 (setf (sap-ref-8 sap new-head) (sap-ref-8 sap head))
949 (multiple-value-bind (count err)
950 (sb!unix:unix-read (fd-stream-fd stream)
952 (- (fd-stream-ibuf-length stream) new-head))
953 (declare (type (or index null) count))
955 (simple-stream-perror "couldn't read from ~S" stream err))
956 (setf (fd-stream-listen stream) nil
957 (fd-stream-ibuf-head stream) 0
958 (fd-stream-ibuf-tail stream) (+ count new-head))
961 (defmacro define-external-format (external-format size output-restart
963 (let* ((name (first external-format))
964 (out-function (intern (let ((*print-case* :upcase))
965 (format nil "OUTPUT-BYTES/~A" name))))
966 (format (format nil "OUTPUT-CHAR-~A-~~A-BUFFERED" name))
967 (in-function (intern (let ((*print-case* :upcase))
968 (format nil "FD-STREAM-READ-N-CHARACTERS/~A"
970 (in-char-function (intern (let ((*print-case* :upcase))
971 (format nil "INPUT-CHAR/~A" name)))))
973 (defun ,out-function (stream string flush-p start end)
974 (let ((start (or start 0))
975 (end (or end (length string))))
976 (declare (type index start end))
977 (when (> (fd-stream-ibuf-tail stream)
978 (fd-stream-ibuf-head stream))
979 (file-position stream (file-position stream)))
981 (error ":END before :START!"))
984 (setf (fd-stream-obuf-tail stream)
985 (do* ((len (fd-stream-obuf-length stream))
986 (sap (fd-stream-obuf-sap stream))
987 (tail (fd-stream-obuf-tail stream)))
988 ((or (= start end) (< (- len tail) 4)) tail)
990 `(with-simple-restart (output-nothing
991 "~@<Skip output of this character.~@:>")
992 (let* ((byte (aref string start))
993 (bits (char-code byte)))
996 `(let* ((byte (aref string start))
997 (bits (char-code byte)))
1002 (flush-output-buffer stream)))
1004 (flush-output-buffer stream))))
1005 (def-output-routines (,format
1011 (if (char= byte #\Newline)
1012 (setf (fd-stream-char-pos stream) 0)
1013 (incf (fd-stream-char-pos stream)))
1014 (let ((bits (char-code byte))
1015 (sap (fd-stream-obuf-sap stream))
1016 (tail (fd-stream-obuf-tail stream)))
1018 (defun ,in-function (stream buffer start requested eof-error-p
1019 &aux (total-copied 0))
1020 (declare (type fd-stream stream))
1021 (declare (type index start requested total-copied))
1022 (let ((unread (fd-stream-unread stream)))
1024 (setf (aref buffer start) unread)
1025 (setf (fd-stream-unread stream) nil)
1026 (setf (fd-stream-listen stream) nil)
1027 (incf total-copied)))
1030 (let* ((head (fd-stream-ibuf-head stream))
1031 (tail (fd-stream-ibuf-tail stream))
1032 (sap (fd-stream-ibuf-sap stream)))
1033 (declare (type index head tail))
1034 ;; Copy data from stream buffer into user's buffer.
1036 ((or (= tail head) (= requested total-copied)))
1037 (let* ((byte (sap-ref-8 sap head)))
1038 (when (> ,size (- tail head))
1040 (setf (aref buffer (+ start total-copied)) ,in-expr)
1043 (setf (fd-stream-ibuf-head stream) head)
1044 ;; Maybe we need to refill the stream buffer.
1045 (cond ( ;; If there were enough data in the stream buffer, we're done.
1046 (= total-copied requested)
1047 (return total-copied))
1048 ( ;; If EOF, we're done in another way.
1049 (zerop (refill-fd-stream-buffer stream))
1051 (error 'end-of-file :stream stream)
1052 (return total-copied)))
1053 ;; Otherwise we refilled the stream buffer, so fall
1054 ;; through into another pass of the loop.
1056 (def-input-routine ,in-char-function (character ,size sap head)
1057 (let ((byte (sap-ref-8 sap head)))
1059 (setf *external-formats*
1060 (cons '(,external-format ,in-function ,in-char-function ,out-function
1061 ,@(mapcar #'(lambda (buffering)
1062 (intern (let ((*print-case* :upcase))
1063 (format nil format buffering))))
1064 '(:none :line :full)))
1065 *external-formats*)))))
1067 (defmacro define-external-format/variable-width
1068 (external-format output-restart out-size-expr
1069 out-expr in-size-expr in-expr)
1070 (let* ((name (first external-format))
1071 (out-function (intern (let ((*print-case* :upcase))
1072 (format nil "OUTPUT-BYTES/~A" name))))
1073 (format (format nil "OUTPUT-CHAR-~A-~~A-BUFFERED" name))
1074 (in-function (intern (let ((*print-case* :upcase))
1075 (format nil "FD-STREAM-READ-N-CHARACTERS/~A"
1077 (in-char-function (intern (let ((*print-case* :upcase))
1078 (format nil "INPUT-CHAR/~A" name))))
1079 (resync-function (intern (let ((*print-case* :upcase))
1080 (format nil "RESYNC/~A" name)))))
1082 (defun ,out-function (fd-stream string flush-p start end)
1083 (let ((start (or start 0))
1084 (end (or end (length string))))
1085 (declare (type index start end))
1086 (when (> (fd-stream-ibuf-tail fd-stream)
1087 (fd-stream-ibuf-head fd-stream))
1088 (file-position fd-stream (file-position fd-stream)))
1090 (error ":END before :START!"))
1093 (setf (fd-stream-obuf-tail fd-stream)
1094 (do* ((len (fd-stream-obuf-length fd-stream))
1095 (sap (fd-stream-obuf-sap fd-stream))
1096 (tail (fd-stream-obuf-tail fd-stream)))
1097 ((or (= start end) (< (- len tail) 4)) tail)
1098 (let* ((byte (aref string start))
1099 (bits (char-code byte))
1100 (size ,out-size-expr))
1105 (flush-output-buffer fd-stream)))
1107 (flush-output-buffer fd-stream))))
1108 (def-output-routines/variable-width (,format
1115 (if (char= byte #\Newline)
1116 (setf (fd-stream-char-pos stream) 0)
1117 (incf (fd-stream-char-pos stream)))
1118 (let ((bits (char-code byte))
1119 (sap (fd-stream-obuf-sap stream))
1120 (tail (fd-stream-obuf-tail stream)))
1122 (defun ,in-function (stream buffer start requested eof-error-p
1123 &aux (total-copied 0))
1124 (declare (type fd-stream stream))
1125 (declare (type index start requested total-copied))
1126 (let ((unread (fd-stream-unread stream)))
1128 (setf (aref buffer start) unread)
1129 (setf (fd-stream-unread stream) nil)
1130 (setf (fd-stream-listen stream) nil)
1131 (incf total-copied)))
1134 (let* ((head (fd-stream-ibuf-head stream))
1135 (tail (fd-stream-ibuf-tail stream))
1136 (sap (fd-stream-ibuf-sap stream)))
1137 (declare (type index head tail))
1138 ;; Copy data from stream buffer into user's buffer.
1139 (do ((size nil nil))
1140 ((or (= tail head) (= requested total-copied)))
1142 (unless (block character-decode
1143 (let ((byte (sap-ref-8 sap head)))
1144 (setq size ,in-size-expr)
1145 (when (> size (- tail head))
1147 (setf (aref buffer (+ start total-copied))
1151 (setf (fd-stream-ibuf-head stream) head)
1152 (if (plusp total-copied)
1153 (return-from ,in-function total-copied)
1154 (stream-decoding-error
1157 (loop for i from 0 below size
1158 collect (sap-ref-8 (fd-stream-ibuf-sap
1160 (+ (fd-stream-ibuf-head
1163 (list (sap-ref-8 (fd-stream-ibuf-sap stream)
1164 (fd-stream-ibuf-head stream)))))))
1166 :report (lambda (stream)
1168 "~@<Attempt to resync the stream at a ~
1169 character boundary and continue.~@:>"))
1170 (,resync-function stream)
1171 (setf head (fd-stream-ibuf-head stream)))
1172 (force-end-of-file ()
1173 :report (lambda (stream)
1174 (format stream "~@<Force an end of file.~@:>"))
1176 (error 'end-of-file :stream stream)
1177 (return-from ,in-function total-copied)))))
1178 (setf (fd-stream-ibuf-head stream) head)
1179 ;; Maybe we need to refill the stream buffer.
1180 (cond ( ;; If there were enough data in the stream buffer, we're done.
1181 (= total-copied requested)
1182 (return total-copied))
1183 ( ;; If EOF, we're done in another way.
1184 (zerop (refill-fd-stream-buffer stream))
1186 (error 'end-of-file :stream stream)
1187 (return total-copied)))
1188 ;; Otherwise we refilled the stream buffer, so fall
1189 ;; through into another pass of the loop.
1191 (def-input-routine/variable-width ,in-char-function (character
1196 (let ((byte (sap-ref-8 sap head)))
1198 (defun ,resync-function (stream)
1199 (loop (input-at-least stream 1)
1200 (incf (fd-stream-ibuf-head stream))
1201 (when (block character-decode
1202 (let* ((sap (fd-stream-ibuf-sap stream))
1203 (head (fd-stream-ibuf-head stream))
1204 (byte (sap-ref-8 sap head))
1205 (size ,in-size-expr))
1208 (setf *external-formats*
1209 (cons '(,external-format ,in-function ,in-char-function ,out-function
1210 ,@(mapcar #'(lambda (buffering)
1211 (intern (let ((*print-case* :upcase))
1212 (format nil format buffering))))
1213 '(:none :line :full))
1215 *external-formats*)))))
1217 (define-external-format (:latin-1 :latin1 :iso-8859-1)
1220 (stream-encoding-error stream bits)
1221 (setf (sap-ref-8 sap tail) bits))
1224 (define-external-format (:ascii :us-ascii :ansi_x3.4-1968)
1227 (stream-encoding-error stream bits)
1228 (setf (sap-ref-8 sap tail) bits))
1231 (let* ((table (let ((s (make-string 256)))
1232 (map-into s #'code-char
1233 '(#x00 #x01 #x02 #x03 #x9c #x09 #x86 #x7f #x97 #x8d #x8e #x0b #x0c #x0d #x0e #x0f
1234 #x10 #x11 #x12 #x13 #x9d #x85 #x08 #x87 #x18 #x19 #x92 #x8f #x1c #x1d #x1e #x1f
1235 #x80 #x81 #x82 #x83 #x84 #x0a #x17 #x1b #x88 #x89 #x8a #x8b #x8c #x05 #x06 #x07
1236 #x90 #x91 #x16 #x93 #x94 #x95 #x96 #x04 #x98 #x99 #x9a #x9b #x14 #x15 #x9e #x1a
1237 #x20 #xa0 #xe2 #xe4 #xe0 #xe1 #xe3 #xe5 #xe7 #xf1 #xa2 #x2e #x3c #x28 #x2b #x7c
1238 #x26 #xe9 #xea #xeb #xe8 #xed #xee #xef #xec #xdf #x21 #x24 #x2a #x29 #x3b #xac
1239 #x2d #x2f #xc2 #xc4 #xc0 #xc1 #xc3 #xc5 #xc7 #xd1 #xa6 #x2c #x25 #x5f #x3e #x3f
1240 #xf8 #xc9 #xca #xcb #xc8 #xcd #xce #xcf #xcc #x60 #x3a #x23 #x40 #x27 #x3d #x22
1241 #xd8 #x61 #x62 #x63 #x64 #x65 #x66 #x67 #x68 #x69 #xab #xbb #xf0 #xfd #xfe #xb1
1242 #xb0 #x6a #x6b #x6c #x6d #x6e #x6f #x70 #x71 #x72 #xaa #xba #xe6 #xb8 #xc6 #xa4
1243 #xb5 #x7e #x73 #x74 #x75 #x76 #x77 #x78 #x79 #x7a #xa1 #xbf #xd0 #xdd #xde #xae
1244 #x5e #xa3 #xa5 #xb7 #xa9 #xa7 #xb6 #xbc #xbd #xbe #x5b #x5d #xaf #xa8 #xb4 #xd7
1245 #x7b #x41 #x42 #x43 #x44 #x45 #x46 #x47 #x48 #x49 #xad #xf4 #xf6 #xf2 #xf3 #xf5
1246 #x7d #x4a #x4b #x4c #x4d #x4e #x4f #x50 #x51 #x52 #xb9 #xfb #xfc #xf9 #xfa #xff
1247 #x5c #xf7 #x53 #x54 #x55 #x56 #x57 #x58 #x59 #x5a #xb2 #xd4 #xd6 #xd2 #xd3 #xd5
1248 #x30 #x31 #x32 #x33 #x34 #x35 #x36 #x37 #x38 #x39 #xb3 #xdb #xdc #xd9 #xda #x9f))
1250 (reverse-table (let ((rt (make-array 256 :element-type '(unsigned-byte 8) :initial-element 0)))
1251 (loop for char across table for i from 0
1252 do (aver (= 0 (aref rt (char-code char))))
1253 do (setf (aref rt (char-code char)) i))
1255 (define-external-format (:ebcdic-us :ibm-037 :ibm037)
1258 (stream-encoding-error stream bits)
1259 (setf (sap-ref-8 sap tail) (aref reverse-table bits)))
1264 (let ((latin-9-table (let ((table (make-string 256)))
1267 (setf (aref table i) (code-char i)))
1268 (setf (aref table #xa4) (code-char #x20ac))
1269 (setf (aref table #xa6) (code-char #x0160))
1270 (setf (aref table #xa8) (code-char #x0161))
1271 (setf (aref table #xb4) (code-char #x017d))
1272 (setf (aref table #xb8) (code-char #x017e))
1273 (setf (aref table #xbc) (code-char #x0152))
1274 (setf (aref table #xbd) (code-char #x0153))
1275 (setf (aref table #xbe) (code-char #x0178))
1277 (latin-9-reverse-1 (make-array 16
1278 :element-type '(unsigned-byte 21)
1279 :initial-contents '(#x0160 #x0161 #x0152 #x0153 0 0 0 0 #x0178 0 0 0 #x20ac #x017d #x017e 0)))
1280 (latin-9-reverse-2 (make-array 16
1281 :element-type '(unsigned-byte 8)
1282 :initial-contents '(#xa6 #xa8 #xbc #xbd 0 0 0 0 #xbe 0 0 0 #xa4 #xb4 #xb8 0))))
1283 (define-external-format (:latin-9 :latin9 :iso-8859-15)
1285 (setf (sap-ref-8 sap tail)
1287 (if (= bits (char-code (aref latin-9-table bits)))
1289 (stream-encoding-error stream byte))
1290 (if (= (aref latin-9-reverse-1 (logand bits 15)) bits)
1291 (aref latin-9-reverse-2 (logand bits 15))
1292 (stream-encoding-error stream byte))))
1293 (aref latin-9-table byte)))
1295 (define-external-format/variable-width (:utf-8 :utf8) nil
1296 (let ((bits (char-code byte)))
1297 (cond ((< bits #x80) 1)
1299 ((< bits #x10000) 3)
1302 (1 (setf (sap-ref-8 sap tail) bits))
1303 (2 (setf (sap-ref-8 sap tail) (logior #xc0 (ldb (byte 5 6) bits))
1304 (sap-ref-8 sap (1+ tail)) (logior #x80 (ldb (byte 6 0) bits))))
1305 (3 (setf (sap-ref-8 sap tail) (logior #xe0 (ldb (byte 4 12) bits))
1306 (sap-ref-8 sap (1+ tail)) (logior #x80 (ldb (byte 6 6) bits))
1307 (sap-ref-8 sap (+ 2 tail)) (logior #x80 (ldb (byte 6 0) bits))))
1308 (4 (setf (sap-ref-8 sap tail) (logior #xf0 (ldb (byte 3 18) bits))
1309 (sap-ref-8 sap (1+ tail)) (logior #x80 (ldb (byte 6 12) bits))
1310 (sap-ref-8 sap (+ 2 tail)) (logior #x80 (ldb (byte 6 6) bits))
1311 (sap-ref-8 sap (+ 3 tail)) (logior #x80 (ldb (byte 6 0) bits)))))
1312 (cond ((< byte #x80) 1)
1313 ((< byte #xc2) (return-from character-decode))
1317 (code-char (ecase size
1319 (2 (let ((byte2 (sap-ref-8 sap (1+ head))))
1320 (unless (<= #x80 byte2 #xbf)
1321 (return-from character-decode))
1322 (dpb byte (byte 5 6) byte2)))
1323 (3 (let ((byte2 (sap-ref-8 sap (1+ head)))
1324 (byte3 (sap-ref-8 sap (+ 2 head))))
1325 (unless (and (<= #x80 byte2 #xbf)
1326 (<= #x80 byte3 #xbf))
1327 (return-from character-decode))
1328 (dpb byte (byte 4 12) (dpb byte2 (byte 6 6) byte3))))
1329 (4 (let ((byte2 (sap-ref-8 sap (1+ head)))
1330 (byte3 (sap-ref-8 sap (+ 2 head)))
1331 (byte4 (sap-ref-8 sap (+ 3 head))))
1332 (unless (and (<= #x80 byte2 #xbf)
1333 (<= #x80 byte3 #xbf)
1334 (<= #x80 byte4 #xbf))
1335 (return-from character-decode))
1336 (dpb byte (byte 3 18)
1337 (dpb byte2 (byte 6 12)
1338 (dpb byte3 (byte 6 6) byte4))))))))
1340 ;;;; utility functions (misc routines, etc)
1342 ;;; Fill in the various routine slots for the given type. INPUT-P and
1343 ;;; OUTPUT-P indicate what slots to fill. The buffering slot must be
1344 ;;; set prior to calling this routine.
1345 (defun set-fd-stream-routines (fd-stream type input-p output-p buffer-p)
1346 (let ((target-type (case type
1347 ((:default unsigned-byte)
1357 (character-stream-p (subtypep type 'character)))
1359 (when (fd-stream-obuf-sap fd-stream)
1360 (push (fd-stream-obuf-sap fd-stream) *available-buffers*)
1361 (setf (fd-stream-obuf-sap fd-stream) nil))
1362 (when (fd-stream-ibuf-sap fd-stream)
1363 (push (fd-stream-ibuf-sap fd-stream) *available-buffers*)
1364 (setf (fd-stream-ibuf-sap fd-stream) nil))
1366 (when (and character-stream-p
1367 (eq (fd-stream-external-format fd-stream) :default))
1368 (setf (fd-stream-external-format fd-stream)
1369 (intern (or (alien-funcall
1370 (extern-alien "nl_langinfo"
1371 (function c-string int))
1375 (dolist (entry *external-formats*
1376 (setf (fd-stream-external-format fd-stream) :latin-1))
1377 (when (member (fd-stream-external-format fd-stream) (first entry))
1381 (multiple-value-bind (routine type size read-n-characters
1382 normalized-external-format)
1383 (pick-input-routine target-type
1384 (fd-stream-external-format fd-stream))
1385 (when normalized-external-format
1386 (setf (fd-stream-external-format fd-stream)
1387 normalized-external-format))
1389 (error "could not find any input routine for ~S" target-type))
1390 (setf (fd-stream-ibuf-sap fd-stream) (next-available-buffer))
1391 (setf (fd-stream-ibuf-length fd-stream) bytes-per-buffer)
1392 (setf (fd-stream-ibuf-tail fd-stream) 0)
1393 (if character-stream-p
1394 (setf (fd-stream-in fd-stream) routine
1395 (fd-stream-bin fd-stream) #'ill-bin)
1396 (setf (fd-stream-in fd-stream) #'ill-in
1397 (fd-stream-bin fd-stream) routine))
1399 (setf (fd-stream-n-bin fd-stream)
1400 (if character-stream-p
1402 #'fd-stream-read-n-bytes))
1404 ;; We only create this buffer for streams of type
1405 ;; (unsigned-byte 8). Because there's no buffer, the
1406 ;; other element-types will dispatch to the appropriate
1407 ;; input (output) routine in fast-read-byte.
1408 (or character-stream-p
1409 (equal target-type '(unsigned-byte 8)))
1410 (not output-p) ; temporary disable on :io streams
1412 (or (eq type 'unsigned-byte)
1413 (eq type :default)))
1414 (if character-stream-p
1415 (setf (ansi-stream-cin-buffer fd-stream)
1416 (make-array +ansi-stream-in-buffer-length+
1417 :element-type 'character))
1418 (setf (ansi-stream-in-buffer fd-stream)
1419 (make-array +ansi-stream-in-buffer-length+
1420 :element-type '(unsigned-byte 8))))))
1421 (setf input-size size)
1422 (setf input-type type)))
1425 (multiple-value-bind (routine type size output-bytes
1426 normalized-external-format)
1427 (pick-output-routine target-type
1428 (fd-stream-buffering fd-stream)
1429 (fd-stream-external-format fd-stream))
1430 (when normalized-external-format
1431 (setf (fd-stream-external-format fd-stream)
1432 normalized-external-format))
1434 (error "could not find any output routine for ~S buffered ~S"
1435 (fd-stream-buffering fd-stream)
1437 (setf (fd-stream-obuf-sap fd-stream) (next-available-buffer))
1438 (setf (fd-stream-obuf-length fd-stream) bytes-per-buffer)
1439 (setf (fd-stream-obuf-tail fd-stream) 0)
1440 (when character-stream-p
1441 (setf (fd-stream-output-bytes fd-stream) output-bytes))
1442 (if character-stream-p
1443 (setf (fd-stream-out fd-stream) routine
1444 (fd-stream-bout fd-stream) #'ill-bout)
1445 (setf (fd-stream-out fd-stream)
1446 (or (if (eql size 1)
1447 (pick-output-routine
1448 'base-char (fd-stream-buffering fd-stream)))
1450 (fd-stream-bout fd-stream) routine))
1451 (setf (fd-stream-sout fd-stream)
1452 (if (eql size 1) #'fd-sout #'ill-out))
1453 (setf (fd-stream-char-pos fd-stream) 0)
1454 (setf output-size size)
1455 (setf output-type type)))
1457 (when (and input-size output-size
1458 (not (eq input-size output-size)))
1459 (error "Element sizes for input (~S:~S) and output (~S:~S) differ?"
1460 input-type input-size
1461 output-type output-size))
1462 (setf (fd-stream-element-size fd-stream)
1463 (or input-size output-size))
1465 (setf (fd-stream-element-type fd-stream)
1466 (cond ((equal input-type output-type)
1472 ((subtypep input-type output-type)
1474 ((subtypep output-type input-type)
1477 (error "Input type (~S) and output type (~S) are unrelated?"
1481 ;;; Handle miscellaneous operations on FD-STREAM.
1482 (defun fd-stream-misc-routine (fd-stream operation &optional arg1 arg2)
1483 (declare (ignore arg2))
1486 (or (not (eql (fd-stream-ibuf-head fd-stream)
1487 (fd-stream-ibuf-tail fd-stream)))
1488 (fd-stream-listen fd-stream)
1489 (setf (fd-stream-listen fd-stream)
1490 (eql (sb!alien:with-alien ((read-fds (sb!alien:struct
1492 (sb!unix:fd-zero read-fds)
1493 (sb!unix:fd-set (fd-stream-fd fd-stream) read-fds)
1494 (sb!unix:unix-fast-select (1+ (fd-stream-fd fd-stream))
1495 (sb!alien:addr read-fds)
1499 (setf (fd-stream-unread fd-stream) arg1)
1500 (setf (fd-stream-listen fd-stream) t))
1502 (cond (arg1 ; We got us an abort on our hands.
1503 (when (fd-stream-handler fd-stream)
1504 (sb!sys:remove-fd-handler (fd-stream-handler fd-stream))
1505 (setf (fd-stream-handler fd-stream) nil))
1506 ;; We can't do anything unless we know what file were
1507 ;; dealing with, and we don't want to do anything
1508 ;; strange unless we were writing to the file.
1509 (when (and (fd-stream-file fd-stream)
1510 (fd-stream-obuf-sap fd-stream))
1511 (if (fd-stream-original fd-stream)
1512 ;; If the original is EQ to file we are appending
1513 ;; and can just close the file without renaming.
1514 (unless (eq (fd-stream-original fd-stream)
1515 (fd-stream-file fd-stream))
1516 ;; We have a handle on the original, just revert.
1517 (multiple-value-bind (okay err)
1518 (sb!unix:unix-rename (fd-stream-original fd-stream)
1519 (fd-stream-file fd-stream))
1521 (simple-stream-perror
1522 "couldn't restore ~S to its original contents"
1525 ;; We can't restore the original, and aren't
1526 ;; appending, so nuke that puppy.
1528 ;; FIXME: This is currently the fate of superseded
1529 ;; files, and according to the CLOSE spec this is
1530 ;; wrong. However, there seems to be no clean way to
1531 ;; do that that doesn't involve either copying the
1532 ;; data (bad if the :abort resulted from a full
1533 ;; disk), or renaming the old file temporarily
1534 ;; (probably bad because stream opening becomes more
1536 (multiple-value-bind (okay err)
1537 (sb!unix:unix-unlink (fd-stream-file fd-stream))
1539 (error 'simple-file-error
1540 :pathname (fd-stream-file fd-stream)
1542 "~@<couldn't remove ~S: ~2I~_~A~:>"
1543 :format-arguments (list (fd-stream-file fd-stream)
1544 (strerror err))))))))
1546 (fd-stream-misc-routine fd-stream :finish-output)
1547 (when (and (fd-stream-original fd-stream)
1548 (fd-stream-delete-original fd-stream))
1549 (multiple-value-bind (okay err)
1550 (sb!unix:unix-unlink (fd-stream-original fd-stream))
1552 (error 'simple-file-error
1553 :pathname (fd-stream-original fd-stream)
1555 "~@<couldn't delete ~S during close of ~S: ~
1558 (list (fd-stream-original fd-stream)
1560 (strerror err))))))))
1561 (when (fboundp 'cancel-finalization)
1562 (cancel-finalization fd-stream))
1563 (sb!unix:unix-close (fd-stream-fd fd-stream))
1564 (when (fd-stream-obuf-sap fd-stream)
1565 (push (fd-stream-obuf-sap fd-stream) *available-buffers*)
1566 (setf (fd-stream-obuf-sap fd-stream) nil))
1567 (when (fd-stream-ibuf-sap fd-stream)
1568 (push (fd-stream-ibuf-sap fd-stream) *available-buffers*)
1569 (setf (fd-stream-ibuf-sap fd-stream) nil))
1570 (sb!impl::set-closed-flame fd-stream))
1572 (setf (fd-stream-unread fd-stream) nil)
1573 (setf (fd-stream-ibuf-head fd-stream) 0)
1574 (setf (fd-stream-ibuf-tail fd-stream) 0)
1575 (catch 'eof-input-catcher
1577 (let ((count (sb!alien:with-alien ((read-fds (sb!alien:struct
1579 (sb!unix:fd-zero read-fds)
1580 (sb!unix:fd-set (fd-stream-fd fd-stream) read-fds)
1581 (sb!unix:unix-fast-select (1+ (fd-stream-fd fd-stream))
1582 (sb!alien:addr read-fds)
1587 (cond ((eql count 1)
1588 (frob-input fd-stream)
1589 (setf (fd-stream-ibuf-head fd-stream) 0)
1590 (setf (fd-stream-ibuf-tail fd-stream) 0))
1594 (flush-output-buffer fd-stream))
1596 (flush-output-buffer fd-stream)
1598 ((null (fd-stream-output-later fd-stream)))
1599 (sb!sys:serve-all-events)))
1601 (fd-stream-element-type fd-stream))
1603 (= 1 (the (member 0 1)
1604 (sb!unix:unix-isatty (fd-stream-fd fd-stream)))))
1608 (fd-stream-char-pos fd-stream))
1610 (unless (fd-stream-file fd-stream)
1611 ;; This is a TYPE-ERROR because ANSI's species FILE-LENGTH
1612 ;; "should signal an error of type TYPE-ERROR if stream is not
1613 ;; a stream associated with a file". Too bad there's no very
1614 ;; appropriate value for the EXPECTED-TYPE slot..
1615 (error 'simple-type-error
1617 :expected-type 'fd-stream
1618 :format-control "~S is not a stream associated with a file."
1619 :format-arguments (list fd-stream)))
1620 (multiple-value-bind (okay dev ino mode nlink uid gid rdev size
1621 atime mtime ctime blksize blocks)
1622 (sb!unix:unix-fstat (fd-stream-fd fd-stream))
1623 (declare (ignore ino nlink uid gid rdev
1624 atime mtime ctime blksize blocks))
1626 (simple-stream-perror "failed Unix fstat(2) on ~S" fd-stream dev))
1629 (truncate size (fd-stream-element-size fd-stream)))))
1631 (fd-stream-file-position fd-stream arg1))))
1633 (defun fd-stream-file-position (stream &optional newpos)
1634 (declare (type fd-stream stream)
1635 (type (or (alien sb!unix:off-t) (member nil :start :end)) newpos))
1637 (sb!sys:without-interrupts
1638 ;; First, find the position of the UNIX file descriptor in the file.
1639 (multiple-value-bind (posn errno)
1640 (sb!unix:unix-lseek (fd-stream-fd stream) 0 sb!unix:l_incr)
1641 (declare (type (or (alien sb!unix:off-t) null) posn))
1642 (cond ((integerp posn)
1643 ;; Adjust for buffered output: If there is any output
1644 ;; buffered, the *real* file position will be larger
1645 ;; than reported by lseek() because lseek() obviously
1646 ;; cannot take into account output we have not sent
1648 (dolist (later (fd-stream-output-later stream))
1649 (incf posn (- (caddr later)
1651 (incf posn (fd-stream-obuf-tail stream))
1652 ;; Adjust for unread input: If there is any input
1653 ;; read from UNIX but not supplied to the user of the
1654 ;; stream, the *real* file position will smaller than
1655 ;; reported, because we want to look like the unread
1656 ;; stuff is still available.
1657 (decf posn (- (fd-stream-ibuf-tail stream)
1658 (fd-stream-ibuf-head stream)))
1659 (when (fd-stream-unread stream)
1661 ;; Divide bytes by element size.
1662 (truncate posn (fd-stream-element-size stream)))
1663 ((eq errno sb!unix:espipe)
1666 (sb!sys:with-interrupts
1667 (simple-stream-perror "failure in Unix lseek() on ~S"
1670 (let ((offset 0) origin)
1671 (declare (type (alien sb!unix:off-t) offset))
1672 ;; Make sure we don't have any output pending, because if we
1673 ;; move the file pointer before writing this stuff, it will be
1674 ;; written in the wrong location.
1675 (flush-output-buffer stream)
1677 ((null (fd-stream-output-later stream)))
1678 (sb!sys:serve-all-events))
1679 ;; Clear out any pending input to force the next read to go to
1681 (setf (fd-stream-unread stream) nil)
1682 (setf (fd-stream-ibuf-head stream) 0)
1683 (setf (fd-stream-ibuf-tail stream) 0)
1684 ;; Trash cached value for listen, so that we check next time.
1685 (setf (fd-stream-listen stream) nil)
1687 (cond ((eq newpos :start)
1688 (setf offset 0 origin sb!unix:l_set))
1690 (setf offset 0 origin sb!unix:l_xtnd))
1691 ((typep newpos '(alien sb!unix:off-t))
1692 (setf offset (* newpos (fd-stream-element-size stream))
1693 origin sb!unix:l_set))
1695 (error "invalid position given to FILE-POSITION: ~S" newpos)))
1696 (multiple-value-bind (posn errno)
1697 (sb!unix:unix-lseek (fd-stream-fd stream) offset origin)
1698 (cond ((typep posn '(alien sb!unix:off-t))
1700 ((eq errno sb!unix:espipe)
1703 (simple-stream-perror "error in Unix lseek() on ~S"
1707 ;;;; creation routines (MAKE-FD-STREAM and OPEN)
1709 ;;; Create a stream for the given Unix file descriptor.
1711 ;;; If INPUT is non-NIL, allow input operations. If OUTPUT is non-nil,
1712 ;;; allow output operations. If neither INPUT nor OUTPUT is specified,
1713 ;;; default to allowing input.
1715 ;;; ELEMENT-TYPE indicates the element type to use (as for OPEN).
1717 ;;; BUFFERING indicates the kind of buffering to use.
1719 ;;; TIMEOUT (if true) is the number of seconds to wait for input. If
1720 ;;; NIL (the default), then wait forever. When we time out, we signal
1723 ;;; FILE is the name of the file (will be returned by PATHNAME).
1725 ;;; NAME is used to identify the stream when printed.
1726 (defun make-fd-stream (fd
1729 (output nil output-p)
1730 (element-type 'base-char)
1732 (external-format :default)
1740 (format nil "file ~S" file)
1741 (format nil "descriptor ~W" fd)))
1743 (declare (type index fd) (type (or index null) timeout)
1744 (type (member :none :line :full) buffering))
1745 (cond ((not (or input-p output-p))
1747 ((not (or input output))
1748 (error "File descriptor must be opened either for input or output.")))
1749 (let ((stream (%make-fd-stream :fd fd
1753 :delete-original delete-original
1755 :buffering buffering
1756 :external-format external-format
1758 (set-fd-stream-routines stream element-type input output input-buffer-p)
1759 (when (and auto-close (fboundp 'finalize))
1762 (sb!unix:unix-close fd)
1764 (format *terminal-io* "** closed file descriptor ~W **~%"
1768 ;;; Pick a name to use for the backup file for the :IF-EXISTS
1769 ;;; :RENAME-AND-DELETE and :RENAME options.
1770 (defun pick-backup-name (name)
1771 (declare (type simple-base-string name))
1772 (concatenate 'simple-base-string name ".bak"))
1774 ;;; Ensure that the given arg is one of the given list of valid
1775 ;;; things. Allow the user to fix any problems.
1776 (defun ensure-one-of (item list what)
1777 (unless (member item list)
1778 (error 'simple-type-error
1780 :expected-type `(member ,@list)
1781 :format-control "~@<~S is ~_invalid for ~S; ~_need one of~{ ~S~}~:>"
1782 :format-arguments (list item what list))))
1784 ;;; Rename NAMESTRING to ORIGINAL. First, check whether we have write
1785 ;;; access, since we don't want to trash unwritable files even if we
1786 ;;; technically can. We return true if we succeed in renaming.
1787 (defun rename-the-old-one (namestring original)
1788 (unless (sb!unix:unix-access namestring sb!unix:w_ok)
1789 (error "~@<The file ~2I~_~S ~I~_is not writable.~:>" namestring))
1790 (multiple-value-bind (okay err) (sb!unix:unix-rename namestring original)
1793 (error 'simple-file-error
1794 :pathname namestring
1796 "~@<couldn't rename ~2I~_~S ~I~_to ~2I~_~S: ~4I~_~A~:>"
1797 :format-arguments (list namestring original (strerror err))))))
1799 (defun open (filename
1802 (element-type 'base-char)
1803 (if-exists nil if-exists-given)
1804 (if-does-not-exist nil if-does-not-exist-given)
1805 (external-format :default)
1806 &aux ; Squelch assignment warning.
1807 (direction direction)
1808 (if-does-not-exist if-does-not-exist)
1809 (if-exists if-exists))
1811 "Return a stream which reads from or writes to FILENAME.
1813 :DIRECTION - one of :INPUT, :OUTPUT, :IO, or :PROBE
1814 :ELEMENT-TYPE - the type of object to read or write, default BASE-CHAR
1815 :IF-EXISTS - one of :ERROR, :NEW-VERSION, :RENAME, :RENAME-AND-DELETE,
1816 :OVERWRITE, :APPEND, :SUPERSEDE or NIL
1817 :IF-DOES-NOT-EXIST - one of :ERROR, :CREATE or NIL
1818 See the manual for details."
1820 ;; Calculate useful stuff.
1821 (multiple-value-bind (input output mask)
1823 (:input (values t nil sb!unix:o_rdonly))
1824 (:output (values nil t sb!unix:o_wronly))
1825 (:io (values t t sb!unix:o_rdwr))
1826 (:probe (values t nil sb!unix:o_rdonly)))
1827 (declare (type index mask))
1828 (let* ((pathname (merge-pathnames filename))
1830 (cond ((unix-namestring pathname input))
1831 ((and input (eq if-does-not-exist :create))
1832 (unix-namestring pathname nil))
1833 ((and (eq direction :io) (not if-does-not-exist-given))
1834 (unix-namestring pathname nil)))))
1835 ;; Process if-exists argument if we are doing any output.
1837 (unless if-exists-given
1839 (if (eq (pathname-version pathname) :newest)
1842 (ensure-one-of if-exists
1843 '(:error :new-version :rename
1844 :rename-and-delete :overwrite
1845 :append :supersede nil)
1848 ((:new-version :error nil)
1849 (setf mask (logior mask sb!unix:o_excl)))
1850 ((:rename :rename-and-delete)
1851 (setf mask (logior mask sb!unix:o_creat)))
1853 (setf mask (logior mask sb!unix:o_trunc)))
1855 (setf mask (logior mask sb!unix:o_append)))))
1857 (setf if-exists :ignore-this-arg)))
1859 (unless if-does-not-exist-given
1860 (setf if-does-not-exist
1861 (cond ((eq direction :input) :error)
1863 (member if-exists '(:overwrite :append)))
1865 ((eq direction :probe)
1869 (ensure-one-of if-does-not-exist
1870 '(:error :create nil)
1872 (if (eq if-does-not-exist :create)
1873 (setf mask (logior mask sb!unix:o_creat)))
1875 (let ((original (case if-exists
1876 ((:rename :rename-and-delete)
1877 (pick-backup-name namestring))
1879 ;; KLUDGE: Provent CLOSE from deleting
1880 ;; appending streams when called with :ABORT T
1882 (delete-original (eq if-exists :rename-and-delete))
1884 (when (and original (not (eq original namestring)))
1885 ;; We are doing a :RENAME or :RENAME-AND-DELETE. Determine
1886 ;; whether the file already exists, make sure the original
1887 ;; file is not a directory, and keep the mode.
1890 (multiple-value-bind (okay err/dev inode orig-mode)
1891 (sb!unix:unix-stat namestring)
1892 (declare (ignore inode)
1893 (type (or index null) orig-mode))
1896 (when (and output (= (logand orig-mode #o170000)
1898 (error 'simple-file-error
1899 :pathname namestring
1901 "can't open ~S for output: is a directory"
1902 :format-arguments (list namestring)))
1903 (setf mode (logand orig-mode #o777))
1905 ((eql err/dev sb!unix:enoent)
1908 (simple-file-perror "can't find ~S"
1912 (rename-the-old-one namestring original))
1914 (setf delete-original nil)
1915 ;; In order to use :SUPERSEDE instead, we have to make
1916 ;; sure SB!UNIX:O_CREAT corresponds to
1917 ;; IF-DOES-NOT-EXIST. SB!UNIX:O_CREAT was set before
1918 ;; because of IF-EXISTS being :RENAME.
1919 (unless (eq if-does-not-exist :create)
1921 (logior (logandc2 mask sb!unix:o_creat)
1923 (setf if-exists :supersede))))
1925 ;; Now we can try the actual Unix open(2).
1926 (multiple-value-bind (fd errno)
1928 (sb!unix:unix-open namestring mask mode)
1929 (values nil sb!unix:enoent))
1930 (labels ((open-error (format-control &rest format-arguments)
1931 (error 'simple-file-error
1933 :format-control format-control
1934 :format-arguments format-arguments))
1935 (vanilla-open-error ()
1936 (simple-file-perror "error opening ~S" pathname errno)))
1939 ((:input :output :io)
1943 :element-type element-type
1944 :external-format external-format
1947 :delete-original delete-original
1953 (%make-fd-stream :name namestring
1956 :element-type element-type)))
1959 ((eql errno sb!unix:enoent)
1960 (case if-does-not-exist
1961 (:error (vanilla-open-error))
1963 (open-error "~@<The path ~2I~_~S ~I~_does not exist.~:>"
1966 ((and (eql errno sb!unix:eexist) (null if-exists))
1969 (vanilla-open-error)))))))))
1973 ;;; the stream connected to the controlling terminal, or NIL if there is none
1976 ;;; the stream connected to the standard input (file descriptor 0)
1979 ;;; the stream connected to the standard output (file descriptor 1)
1982 ;;; the stream connected to the standard error output (file descriptor 2)
1985 ;;; This is called when the cold load is first started up, and may also
1986 ;;; be called in an attempt to recover from nested errors.
1987 (defun stream-cold-init-or-reset ()
1989 (setf *terminal-io* (make-synonym-stream '*tty*))
1990 (setf *standard-output* (make-synonym-stream '*stdout*))
1991 (setf *standard-input* (make-synonym-stream '*stdin*))
1992 (setf *error-output* (make-synonym-stream '*stderr*))
1993 (setf *query-io* (make-synonym-stream '*terminal-io*))
1994 (setf *debug-io* *query-io*)
1995 (setf *trace-output* *standard-output*)
1998 ;;; This is called whenever a saved core is restarted.
1999 (defun stream-reinit ()
2000 (setf *available-buffers* nil)
2002 (make-fd-stream 0 :name "standard input" :input t :buffering :line))
2004 (make-fd-stream 1 :name "standard output" :output t :buffering :line))
2006 (make-fd-stream 2 :name "standard error" :output t :buffering :line))
2007 (let* ((ttyname #.(coerce "/dev/tty" 'simple-base-string))
2008 (tty (sb!unix:unix-open ttyname sb!unix:o_rdwr #o666)))
2012 :name "the terminal"
2017 (setf *tty* (make-two-way-stream *stdin* *stdout*))))
2022 ;;; the Unix way to beep
2023 (defun beep (stream)
2024 (write-char (code-char bell-char-code) stream)
2025 (finish-output stream))
2027 ;;; This is kind of like FILE-POSITION, but is an internal hack used
2028 ;;; by the filesys stuff to get and set the file name.
2030 ;;; FIXME: misleading name, screwy interface
2031 (defun file-name (stream &optional new-name)
2032 (when (typep stream 'fd-stream)
2034 (setf (fd-stream-pathname stream) new-name)
2035 (setf (fd-stream-file stream)
2036 (unix-namestring new-name nil))
2039 (fd-stream-pathname stream)))))
2041 ;;;; international character support (which is trivial for our simple
2042 ;;;; character sets)
2044 ;;;; (Those who do Lisp only in English might not remember that ANSI
2045 ;;;; requires these functions to be exported from package
2048 (defun file-string-length (stream object)
2049 (declare (type (or string character) object) (type fd-stream stream))
2051 "Return the delta in STREAM's FILE-POSITION that would be caused by writing
2052 OBJECT to STREAM. Non-trivial only in implementations that support
2053 international character sets."
2054 (declare (ignore stream))
2057 (string (length object))))
2059 (defun stream-external-format (stream)
2060 (declare (type fd-stream stream))
2062 "Return the actual external format for fd-streams, otherwise :DEFAULT."
2063 (if (typep stream 'fd-stream)
2064 (fd-stream-external-format stream)