0.9.1.51:

[sbcl.git] / src / code / stream.lisp

diff --git a/src/code/stream.lisp b/src/code/stream.lisp
index f1a3998..d658516 100644 (file)
--- a/src/code/stream.lisp
+++ b/src/code/stream.lisp
@@ -11,21 +11,17 @@
 
 (in-package "SB!IMPL")
 
 
 (in-package "SB!IMPL")
 

-(deftype string-stream ()
-  '(or string-input-stream string-output-stream
-       fill-pointer-output-stream))
-

 ;;;; standard streams
 
 ;;; The initialization of these streams is performed by
 ;;; STREAM-COLD-INIT-OR-RESET.
 ;;;; standard streams
 
 ;;; The initialization of these streams is performed by
 ;;; STREAM-COLD-INIT-OR-RESET.

-(defvar *terminal-io* () #!+sb-doc "Terminal I/O stream.")
-(defvar *standard-input* () #!+sb-doc "Default input stream.")
-(defvar *standard-output* () #!+sb-doc "Default output stream.")
-(defvar *error-output* () #!+sb-doc "Error output stream.")
-(defvar *query-io* () #!+sb-doc "Query I/O stream.")
-(defvar *trace-output* () #!+sb-doc "Trace output stream.")
-(defvar *debug-io* () #!+sb-doc "Interactive debugging stream.")
+(defvar *terminal-io* () #!+sb-doc "terminal I/O stream")
+(defvar *standard-input* () #!+sb-doc "default input stream")
+(defvar *standard-output* () #!+sb-doc "default output stream")
+(defvar *error-output* () #!+sb-doc "error output stream")
+(defvar *query-io* () #!+sb-doc "query I/O stream")
+(defvar *trace-output* () #!+sb-doc "trace output stream")
+(defvar *debug-io* () #!+sb-doc "interactive debugging stream")

 
 (defun ill-in (stream &rest ignore)
   (declare (ignore ignore))
 
 (defun ill-in (stream &rest ignore)
   (declare (ignore ignore))

@@ -58,161 +54,116 @@
 (defun closed-flame (stream &rest ignore)
   (declare (ignore ignore))
   (error "~S is closed." stream))
 (defun closed-flame (stream &rest ignore)
   (declare (ignore ignore))
   (error "~S is closed." stream))

-(defun do-nothing (&rest ignore)
+(defun no-op-placeholder (&rest ignore)

   (declare (ignore ignore)))
 \f
   (declare (ignore ignore)))
 \f

-;;; HOW THE STREAM STRUCTURE IS USED:
-;;;
-;;; Many of the slots of the stream structure contain functions
-;;; which are called to perform some operation on the stream. Closed
-;;; streams have #'CLOSED-FLAME in all of their function slots. If
-;;; one side of an I/O or echo stream is closed, the whole stream is
-;;; considered closed. The functions in the operation slots take
-;;; arguments as follows:
-;;;
-;;; In:                        Stream, Eof-Errorp, Eof-Value
-;;; Bin:               Stream, Eof-Errorp, Eof-Value
-;;; N-Bin:             Stream, Buffer, Start, Numbytes, Eof-Errorp
-;;; Out:               Stream, Character
-;;; Bout:              Stream, Integer
-;;; Sout:              Stream, String, Start, End
-;;; Misc:              Stream, Operation, &Optional Arg1, Arg2
-;;;
-;;; In order to save space, some of the less common stream operations
-;;; are handled by just one function, the MISC method. This function
-;;; is passed a keyword which indicates the operation to perform.
-;;; The following keywords are used:
-;;;  :listen           - Return the following values:
-;;;                         t if any input waiting.
-;;;                         :eof if at eof.
-;;;                         nil if no input is available and not at eof.
-;;;  :unread           - Unread the character Arg.
-;;;  :close            - Do any stream specific stuff to close the stream.
-;;;                      The methods are set to closed-flame by the close
-;;;                      function, so that need not be done by this
-;;;                      function.
-;;;  :clear-input      - Clear any unread input
-;;;  :finish-output,
-;;;  :force-output     - Cause output to happen
-;;;  :clear-output     - Clear any undone output
-;;;  :element-type     - Return the type of element the stream deals with.
-;;;  :line-length      - Return the length of a line of output.
-;;;  :charpos          - Return current output position on the line.
-;;;  :file-length      - Return the file length of a file stream.
-;;;  :file-position    - Return or change the current position of a
-;;;                       file stream.
-;;;  :file-name                - Return the name of an associated file.
-;;;  :interactive-p     - Is this an interactive device?
-;;;
-;;; In order to do almost anything useful, it is necessary to
-;;; define a new type of structure that includes stream, so that the
-;;; stream can have some state information.
-;;;
-;;; THE STREAM IN-BUFFER:
-;;;
-;;; The IN-BUFFER in the stream holds characters or bytes that
-;;; are ready to be read by some input function. If there is any
-;;; stuff in the IN-BUFFER, then the reading function can use it
-;;; without calling any stream method. Any stream may put stuff in
-;;; the IN-BUFFER, and may also assume that any input in the IN-BUFFER
-;;; has been consumed before any in-method is called. If a text
-;;; stream has in IN-BUFFER, then the first character should not be
-;;; used to buffer normal input so that it is free for unreading into.
-;;;
-;;; The IN-BUFFER slot is a vector +IN-BUFFER-LENGTH+ long. The
-;;; IN-INDEX is the index in the IN-BUFFER of the first available
-;;; object. The available objects are thus between IN-INDEX and the
-;;; length of the IN-BUFFER.
-;;;
-;;; When this buffer is only accessed by the normal stream
-;;; functions, the number of function calls is halved, thus
-;;; potentially doubling the speed of simple operations. If the
-;;; FAST-READ-CHAR and FAST-READ-BYTE macros are used, nearly all
-;;; function call overhead is removed, vastly speeding up these
-;;; important operations.
-;;;
-;;; If a stream does not have an IN-BUFFER, then the IN-BUFFER slot
-;;; must be nil, and the IN-INDEX must be +IN-BUFFER-LENGTH+. These are
-;;; the default values for the slots.
-\f

 ;;; stream manipulation functions
 
 ;;; stream manipulation functions
 

-(defun input-stream-p (stream)
-  (declare (type stream stream))
+(declaim (inline ansi-stream-input-stream-p))
+(defun ansi-stream-input-stream-p (stream)
+  (declare (type ansi-stream stream))

 
 

-  #!+high-security

   (when (synonym-stream-p stream)
     (setf stream
          (symbol-value (synonym-stream-symbol stream))))
 
   (when (synonym-stream-p stream)
     (setf stream
          (symbol-value (synonym-stream-symbol stream))))
 

-  (and (lisp-stream-p stream)
-       (not (eq (lisp-stream-in stream) #'closed-flame))
+  (and (not (eq (ansi-stream-in stream) #'closed-flame))

        ;;; KLUDGE: It's probably not good to have EQ tests on function
        ;;; values like this. What if someone's redefined the function?
        ;;; Is there a better way? (Perhaps just VALID-FOR-INPUT and
        ;;; VALID-FOR-OUTPUT flags? -- WHN 19990902
        ;;; KLUDGE: It's probably not good to have EQ tests on function
        ;;; values like this. What if someone's redefined the function?
        ;;; Is there a better way? (Perhaps just VALID-FOR-INPUT and
        ;;; VALID-FOR-OUTPUT flags? -- WHN 19990902

-       (or (not (eq (lisp-stream-in stream) #'ill-in))
-          (not (eq (lisp-stream-bin stream) #'ill-bin)))))
+       (or (not (eq (ansi-stream-in stream) #'ill-in))
+          (not (eq (ansi-stream-bin stream) #'ill-bin)))))

 
 

-(defun output-stream-p (stream)
+(defun input-stream-p (stream)

   (declare (type stream stream))
   (declare (type stream stream))

+  (and (ansi-stream-p stream)
+       (ansi-stream-input-stream-p stream)))
+
+(declaim (inline ansi-stream-output-stream-p))
+(defun ansi-stream-output-stream-p (stream)
+  (declare (type ansi-stream stream))

 
 

-  #!+high-security

   (when (synonym-stream-p stream)
     (setf stream (symbol-value
                  (synonym-stream-symbol stream))))
 
   (when (synonym-stream-p stream)
     (setf stream (symbol-value
                  (synonym-stream-symbol stream))))
 

-  (and (lisp-stream-p stream)
-       (not (eq (lisp-stream-in stream) #'closed-flame))
-       (or (not (eq (lisp-stream-out stream) #'ill-out))
-          (not (eq (lisp-stream-bout stream) #'ill-bout)))))
+  (and (not (eq (ansi-stream-in stream) #'closed-flame))
+       (or (not (eq (ansi-stream-out stream) #'ill-out))
+          (not (eq (ansi-stream-bout stream) #'ill-bout)))))

 
 

-(defun open-stream-p (stream)
+(defun output-stream-p (stream)

   (declare (type stream stream))
   (declare (type stream stream))

-  (not (eq (lisp-stream-in stream) #'closed-flame)))

 
 

-(defun stream-element-type (stream)
-  (declare (type stream stream))
-  (funcall (lisp-stream-misc stream) stream :element-type))
+  (and (ansi-stream-p stream)
+       (ansi-stream-output-stream-p stream)))

 
 

-(defun interactive-stream-p (stream)
-  (declare (type stream stream))
-  (funcall (lisp-stream-misc stream) stream :interactive-p))
+(declaim (inline ansi-stream-open-stream-p))
+(defun ansi-stream-open-stream-p (stream)
+  (declare (type ansi-stream stream))
+  ;; CLHS 22.1.4 lets us not worry about synonym streams here.
+  (not (eq (ansi-stream-in stream) #'closed-flame)))

 
 (defun open-stream-p (stream)
 
 (defun open-stream-p (stream)

-  (declare (type stream stream))
-  (not (eq (lisp-stream-in stream) #'closed-flame)))
+  (ansi-stream-open-stream-p stream))

 
 

-(defun close (stream &key abort)
+(declaim (inline ansi-stream-element-type))
+(defun ansi-stream-element-type (stream)
+  (declare (type ansi-stream stream))
+  (funcall (ansi-stream-misc stream) stream :element-type))
+
+(defun stream-element-type (stream)
+  (ansi-stream-element-type stream))
+
+(defun stream-external-format (stream)
+  (funcall (ansi-stream-misc stream) stream :external-format))
+
+(defun interactive-stream-p (stream)

   (declare (type stream stream))
   (declare (type stream stream))

+  (funcall (ansi-stream-misc stream) stream :interactive-p))
+
+(declaim (inline ansi-stream-close))
+(defun ansi-stream-close (stream abort)
+  (declare (type ansi-stream stream))

   (when (open-stream-p stream)
   (when (open-stream-p stream)

-    (funcall (lisp-stream-misc stream) stream :close abort))
+    (funcall (ansi-stream-misc stream) stream :close abort))

   t)
 
   t)
 

+(defun close (stream &key abort)
+  (ansi-stream-close stream abort))
+

 (defun set-closed-flame (stream)
 (defun set-closed-flame (stream)

-  (setf (lisp-stream-in stream) #'closed-flame)
-  (setf (lisp-stream-bin stream) #'closed-flame)
-  (setf (lisp-stream-n-bin stream) #'closed-flame)
-  (setf (lisp-stream-in stream) #'closed-flame)
-  (setf (lisp-stream-out stream) #'closed-flame)
-  (setf (lisp-stream-bout stream) #'closed-flame)
-  (setf (lisp-stream-sout stream) #'closed-flame)
-  (setf (lisp-stream-misc stream) #'closed-flame))
+  (setf (ansi-stream-in stream) #'closed-flame)
+  (setf (ansi-stream-bin stream) #'closed-flame)
+  (setf (ansi-stream-n-bin stream) #'closed-flame)
+  (setf (ansi-stream-in stream) #'closed-flame)
+  (setf (ansi-stream-out stream) #'closed-flame)
+  (setf (ansi-stream-bout stream) #'closed-flame)
+  (setf (ansi-stream-sout stream) #'closed-flame)
+  (setf (ansi-stream-misc stream) #'closed-flame))

 \f
 ;;;; file position and file length
 
 ;;; Call the MISC method with the :FILE-POSITION operation.
 \f
 ;;;; file position and file length
 
 ;;; Call the MISC method with the :FILE-POSITION operation.

-(defun file-position (stream &optional position)
+#!-sb-fluid (declaim (inline ansi-stream-file-position))
+(defun ansi-stream-file-position (stream position)

   (declare (type stream stream))
   (declare (type stream stream))

-  (declare (type (or index (member nil :start :end)) position))
+  (declare (type (or index (alien sb!unix:off-t) (member nil :start :end))
+                 position))

   (cond
   (cond

-   (position
-    (setf (lisp-stream-in-index stream) +in-buffer-length+)
-    (funcall (lisp-stream-misc stream) stream :file-position position))
-   (t
-    (let ((res (funcall (lisp-stream-misc stream) stream :file-position nil)))
-      (when res
-       (- res (- +in-buffer-length+ (lisp-stream-in-index stream))))))))
+    (position
+     (setf (ansi-stream-in-index stream) +ansi-stream-in-buffer-length+)
+     (funcall (ansi-stream-misc stream) stream :file-position position))
+    (t
+     (let ((res (funcall (ansi-stream-misc stream) stream :file-position nil)))
+       (when res
+         (- res
+            (- +ansi-stream-in-buffer-length+
+               (ansi-stream-in-index stream))))))))
+
+
+(defun file-position (stream &optional position)
+  (ansi-stream-file-position stream position))

 
 ;;; This is a literal translation of the ANSI glossary entry "stream
 ;;; associated with a file".
 
 ;;; This is a literal translation of the ANSI glossary entry "stream
 ;;; associated with a file".

@@ -241,25 +192,37 @@
           ;; EXPECTED-TYPE? This SATISFIES type (with a nonstandard
           ;; private predicate function..) is ugly and confusing, but
           ;; I can't see any other way. -- WHN 2001-04-14
           ;; EXPECTED-TYPE? This SATISFIES type (with a nonstandard
           ;; private predicate function..) is ugly and confusing, but
           ;; I can't see any other way. -- WHN 2001-04-14

+          :datum stream

           :expected-type '(satisfies stream-associated-with-file-p)
           :expected-type '(satisfies stream-associated-with-file-p)

-          :format-string
+          :format-control

           "~@<The stream ~2I~_~S ~I~_isn't associated with a file.~:>"
           :format-arguments (list stream))))
 
 ;;; like FILE-POSITION, only using :FILE-LENGTH
 (defun file-length (stream)
           "~@<The stream ~2I~_~S ~I~_isn't associated with a file.~:>"
           :format-arguments (list stream))))
 
 ;;; like FILE-POSITION, only using :FILE-LENGTH
 (defun file-length (stream)

-  (declare (type (or file-stream synonym-stream) stream))
-  (stream-must-be-associated-with-file stream)
-  (funcall (lisp-stream-misc stream) stream :file-length))
+  ;; FIXME: The following declaration uses yet undefined types, which
+  ;; cause cross-compiler hangup.
+  ;;
+  ;; (declare (type (or file-stream synonym-stream) stream))
+  ;; 
+  ;; The description for FILE-LENGTH says that an error must be raised
+  ;; for streams not associated with files (which broadcast streams
+  ;; aren't according to the glossary). However, the behaviour of
+  ;; FILE-LENGTH for broadcast streams is explicitly described in the
+  ;; BROADCAST-STREAM entry.
+  (unless (typep stream 'broadcast-stream)           
+    (stream-must-be-associated-with-file stream))
+  (funcall (ansi-stream-misc stream) stream :file-length))
+
+(defun file-string-length (stream object)
+  (funcall (ansi-stream-misc stream) stream :file-string-length object))

 \f
 ;;;; input functions
 
 \f
 ;;;; input functions
 

-(defun read-line (&optional (stream *standard-input*) (eof-error-p t) eof-value
-                           recursive-p)
+#!-sb-fluid (declaim (inline ansi-stream-read-line))
+(defun ansi-stream-read-line (stream eof-error-p eof-value recursive-p)

   (declare (ignore recursive-p))
   (declare (ignore recursive-p))

-  (let ((stream (in-synonym-of stream)))
-    (if (lisp-stream-p stream)
-       (prepare-for-fast-read-char stream
+  (prepare-for-fast-read-char stream

          (let ((res (make-string 80))
                (len 80)
                (index 0))
          (let ((res (make-string 80))
                (len 80)
                (index 0))

@@ -286,159 +249,131 @@
                     ;; shouldn't do another READ-CHAR.
                     (t
                      (done-with-fast-read-char)
                     ;; shouldn't do another READ-CHAR.
                     (t
                      (done-with-fast-read-char)

-                     (return (values (shrink-vector res index) t))))))))
+                     (return (values (shrink-vector res index) t)))))))))
+
+(defun read-line (&optional (stream *standard-input*) (eof-error-p t) eof-value
+                           recursive-p)
+  (let ((stream (in-synonym-of stream)))
+    (if (ansi-stream-p stream)
+       (ansi-stream-read-line stream eof-error-p eof-value recursive-p)

        ;; must be Gray streams FUNDAMENTAL-STREAM
        (multiple-value-bind (string eof) (stream-read-line stream)
          (if (and eof (zerop (length string)))
              (values (eof-or-lose stream eof-error-p eof-value) t)
              (values string eof))))))
 
        ;; must be Gray streams FUNDAMENTAL-STREAM
        (multiple-value-bind (string eof) (stream-read-line stream)
          (if (and eof (zerop (length string)))
              (values (eof-or-lose stream eof-error-p eof-value) t)
              (values string eof))))))
 

-;;; We proclaim them INLINE here, then proclaim them MAYBE-INLINE at EOF,
+;;; We proclaim them INLINE here, then proclaim them NOTINLINE later on,

 ;;; so, except in this file, they are not inline by default, but they can be.
 #!-sb-fluid (declaim (inline read-char unread-char read-byte listen))
 
 ;;; so, except in this file, they are not inline by default, but they can be.
 #!-sb-fluid (declaim (inline read-char unread-char read-byte listen))
 

+#!-sb-fluid (declaim (inline ansi-stream-read-char))
+(defun ansi-stream-read-char (stream eof-error-p eof-value recursive-p)
+  (declare (ignore recursive-p))
+  (prepare-for-fast-read-char stream
+    (prog1
+        (fast-read-char eof-error-p eof-value)
+      (done-with-fast-read-char))))
+

 (defun read-char (&optional (stream *standard-input*)
                            (eof-error-p t)
                            eof-value
                            recursive-p)
 (defun read-char (&optional (stream *standard-input*)
                            (eof-error-p t)
                            eof-value
                            recursive-p)

-  (declare (ignore recursive-p))

   (let ((stream (in-synonym-of stream)))
   (let ((stream (in-synonym-of stream)))

-    (if (lisp-stream-p stream)
-       (prepare-for-fast-read-char stream
-         (prog1
-             (fast-read-char eof-error-p eof-value)
-           (done-with-fast-read-char)))
+    (if (ansi-stream-p stream)
+       (ansi-stream-read-char stream eof-error-p eof-value recursive-p)

        ;; must be Gray streams FUNDAMENTAL-STREAM
        (let ((char (stream-read-char stream)))
          (if (eq char :eof)
              (eof-or-lose stream eof-error-p eof-value)
              char)))))
 
        ;; must be Gray streams FUNDAMENTAL-STREAM
        (let ((char (stream-read-char stream)))
          (if (eq char :eof)
              (eof-or-lose stream eof-error-p eof-value)
              char)))))
 

+#!-sb-fluid (declaim (inline ansi-stream-unread-char))
+(defun ansi-stream-unread-char (character stream)
+  (let ((index (1- (ansi-stream-in-index stream)))
+        (buffer (ansi-stream-cin-buffer stream)))
+    (declare (fixnum index))
+    (when (minusp index) (error "nothing to unread"))
+    (cond (buffer
+           (setf (aref buffer index) character)
+           (setf (ansi-stream-in-index stream) index))
+          (t
+           (funcall (ansi-stream-misc stream) stream
+                    :unread character)))))
+

 (defun unread-char (character &optional (stream *standard-input*))
   (let ((stream (in-synonym-of stream)))
 (defun unread-char (character &optional (stream *standard-input*))
   (let ((stream (in-synonym-of stream)))

-    (if (lisp-stream-p stream)
-       (let ((index (1- (lisp-stream-in-index stream)))
-             (buffer (lisp-stream-in-buffer stream)))
-         (declare (fixnum index))
-         (when (minusp index) (error "nothing to unread"))
-         (cond (buffer
-                (setf (aref buffer index) (char-code character))
-                (setf (lisp-stream-in-index stream) index))
-               (t
-                (funcall (lisp-stream-misc stream) stream
-                         :unread character))))
+    (if (ansi-stream-p stream)
+       (ansi-stream-unread-char character stream)

        ;; must be Gray streams FUNDAMENTAL-STREAM
        (stream-unread-char stream character)))
   nil)
 
        ;; must be Gray streams FUNDAMENTAL-STREAM
        (stream-unread-char stream character)))
   nil)
 

-(defun peek-char (&optional (peek-type nil)
-                           (stream *standard-input*)
-                           (eof-error-p t)
-                           eof-value
-                           recursive-p)
-  (declare (ignore recursive-p))
-  ;; FIXME: The type of PEEK-TYPE is also declared in a DEFKNOWN, but
-  ;; the compiler doesn't seem to be smart enough to go from there to
-  ;; imposing a type check. Figure out why (because PEEK-TYPE is an
-  ;; &OPTIONAL argument?) and fix it, and then this explicit type
-  ;; check can go away.
-  (unless (typep peek-type '(or character boolean))
-    (error 'simple-type-error
-          :datum peek-type
-          :expected-type '(or character boolean)
-          :format-control "~@<bad PEEK-TYPE=~S, ~_expected ~S~:>"
-          :format-arguments (list peek-type '(or character boolean))))
-  (let ((stream (in-synonym-of stream)))
-    (if (lisp-stream-p stream)
-       (let ((char (read-char stream eof-error-p eof-value)))
-         (cond ((eq char eof-value) char)
-               ((characterp peek-type)
-                (do ((char char (read-char stream eof-error-p eof-value)))
-                    ((or (eq char eof-value) (char= char peek-type))
-                     (unless (eq char eof-value)
-                       (unread-char char stream))
-                     char)))
-               ((eq peek-type t)
-                (do ((char char (read-char stream eof-error-p eof-value)))
-                    ((or (eq char eof-value) (not (whitespace-char-p char)))
-                     (unless (eq char eof-value)
-                       (unread-char char stream))
-                     char)))
-               ((null peek-type)
-                (unread-char char stream)
-                char)
-               (t
-                (error "internal error: impossible case"))))
-       ;; by elimination, must be Gray streams FUNDAMENTAL-STREAM
-       (cond ((characterp peek-type)
-              (do ((char (stream-read-char stream)
-                         (stream-read-char stream)))
-                  ((or (eq char :eof) (char= char peek-type))
-                   (cond ((eq char :eof)
-                          (eof-or-lose stream eof-error-p eof-value))
-                         (t
-                          (stream-unread-char stream char)
-                          char)))))
-             ((eq peek-type t)
-              (do ((char (stream-read-char stream)
-                         (stream-read-char stream)))
-                  ((or (eq char :eof) (not (whitespace-char-p char)))
-                   (cond ((eq char :eof)
-                          (eof-or-lose stream eof-error-p eof-value))
-                         (t
-                          (stream-unread-char stream char)
-                          char)))))
-             ((null peek-type)
-              (let ((char (stream-peek-char stream)))
-                (if (eq char :eof)
-                    (eof-or-lose stream eof-error-p eof-value)
-                    char)))
-             (t
-              (error "internal error: impossible case"))))))
+#!-sb-fluid (declaim (inline ansi-stream-listen))
+(defun ansi-stream-listen (stream)
+  (or (/= (the fixnum (ansi-stream-in-index stream))
+          +ansi-stream-in-buffer-length+)
+      ;; Handle :EOF return from misc methods specially
+      (let ((result (funcall (ansi-stream-misc stream) stream :listen)))
+       (if (eq result :eof)
+           nil
+           result))))

 
 (defun listen (&optional (stream *standard-input*))
   (let ((stream (in-synonym-of stream)))
 
 (defun listen (&optional (stream *standard-input*))
   (let ((stream (in-synonym-of stream)))

-    (if (lisp-stream-p stream)
-       (or (/= (the fixnum (lisp-stream-in-index stream)) +in-buffer-length+)
-           ;; Test for T explicitly since misc methods return :EOF sometimes.
-           (eq (funcall (lisp-stream-misc stream) stream :listen) t))
+    (if (ansi-stream-p stream)
+       (ansi-stream-listen stream)

        ;; Fall through to Gray streams FUNDAMENTAL-STREAM case.
        (stream-listen stream))))
 
        ;; Fall through to Gray streams FUNDAMENTAL-STREAM case.
        (stream-listen stream))))
 

+#!-sb-fluid (declaim (inline ansi-stream-read-char-no-hang))
+(defun ansi-stream-read-char-no-hang (stream eof-error-p eof-value recursive-p)
+  (if (funcall (ansi-stream-misc stream) stream :listen)
+      ;; On T or :EOF get READ-CHAR to do the work.
+      (ansi-stream-read-char stream eof-error-p eof-value recursive-p)
+      nil))
+

 (defun read-char-no-hang (&optional (stream *standard-input*)
                                    (eof-error-p t)
                                    eof-value
                                    recursive-p)
 (defun read-char-no-hang (&optional (stream *standard-input*)
                                    (eof-error-p t)
                                    eof-value
                                    recursive-p)

-  (declare (ignore recursive-p))

   (let ((stream (in-synonym-of stream)))
   (let ((stream (in-synonym-of stream)))

-    (if (lisp-stream-p stream)
-       (if (funcall (lisp-stream-misc stream) stream :listen)
-           ;; On T or :EOF get READ-CHAR to do the work.
-           (read-char stream eof-error-p eof-value)
-           nil)
+    (if (ansi-stream-p stream)
+       (ansi-stream-read-char-no-hang stream eof-error-p eof-value
+                                       recursive-p)

        ;; must be Gray streams FUNDAMENTAL-STREAM
        (let ((char (stream-read-char-no-hang stream)))
          (if (eq char :eof)
              (eof-or-lose stream eof-error-p eof-value)
              char)))))
 
        ;; must be Gray streams FUNDAMENTAL-STREAM
        (let ((char (stream-read-char-no-hang stream)))
          (if (eq char :eof)
              (eof-or-lose stream eof-error-p eof-value)
              char)))))
 

+#!-sb-fluid (declaim (inline ansi-stream-clear-input))
+(defun ansi-stream-clear-input (stream)
+  (setf (ansi-stream-in-index stream) +ansi-stream-in-buffer-length+)
+  (funcall (ansi-stream-misc stream) stream :clear-input))
+

 (defun clear-input (&optional (stream *standard-input*))
   (let ((stream (in-synonym-of stream)))
 (defun clear-input (&optional (stream *standard-input*))
   (let ((stream (in-synonym-of stream)))

-    (cond ((lisp-stream-p stream)
-          (setf (lisp-stream-in-index stream) +in-buffer-length+)
-          (funcall (lisp-stream-misc stream) stream :clear-input))
-         (t
-          (stream-clear-input stream))))
+    (if (ansi-stream-p stream)
+        (ansi-stream-clear-input stream)
+        ;; must be Gray streams FUNDAMENTAL-STREAM
+        (stream-clear-input stream)))

   nil)
 \f
   nil)
 \f

-(declaim (maybe-inline read-byte))
+#!-sb-fluid (declaim (inline ansi-stream-read-byte))
+(defun ansi-stream-read-byte (stream eof-error-p eof-value recursive-p)
+  ;; Why the "recursive-p" parameter?  a-s-r-b is funcall'ed from
+  ;; a-s-read-sequence and needs a lambda list that's congruent with
+  ;; that of a-s-read-char
+  (declare (ignore recursive-p))
+  (prepare-for-fast-read-byte stream
+    (prog1
+        (fast-read-byte eof-error-p eof-value t)
+      (done-with-fast-read-byte))))
+

 (defun read-byte (stream &optional (eof-error-p t) eof-value)
   (let ((stream (in-synonym-of stream)))
 (defun read-byte (stream &optional (eof-error-p t) eof-value)
   (let ((stream (in-synonym-of stream)))

-    (if (lisp-stream-p stream)
-       (prepare-for-fast-read-byte stream
-         (prog1
-             (fast-read-byte eof-error-p eof-value t)
-           (done-with-fast-read-byte)))
+    (if (ansi-stream-p stream)
+       (ansi-stream-read-byte stream eof-error-p eof-value nil)

        ;; must be Gray streams FUNDAMENTAL-STREAM
        (let ((char (stream-read-byte stream)))
          (if (eq char :eof)
        ;; must be Gray streams FUNDAMENTAL-STREAM
        (let ((char (stream-read-byte stream)))
          (if (eq char :eof)

@@ -456,32 +391,42 @@
 ;;; If we ever need it, it could be added later as a new variant N-BIN
 ;;; method (perhaps N-BIN-ASAP?) or something.
 (defun read-n-bytes (stream buffer start numbytes &optional (eof-error-p t))
 ;;; If we ever need it, it could be added later as a new variant N-BIN
 ;;; method (perhaps N-BIN-ASAP?) or something.
 (defun read-n-bytes (stream buffer start numbytes &optional (eof-error-p t))

-  (declare (type lisp-stream stream)
+  (declare (type ansi-stream stream)

           (type index numbytes start)
           (type (or (simple-array * (*)) system-area-pointer) buffer))
           (type index numbytes start)
           (type (or (simple-array * (*)) system-area-pointer) buffer))

-  (let* ((stream (in-synonym-of stream lisp-stream))
-        (in-buffer (lisp-stream-in-buffer stream))
-        (index (lisp-stream-in-index stream))
-        (num-buffered (- +in-buffer-length+ index)))
+  (let* ((stream (in-synonym-of stream ansi-stream))
+        (in-buffer (ansi-stream-in-buffer stream))
+        (index (ansi-stream-in-index stream))
+        (num-buffered (- +ansi-stream-in-buffer-length+ index)))

     (declare (fixnum index num-buffered))
     (cond
      ((not in-buffer)
     (declare (fixnum index num-buffered))
     (cond
      ((not in-buffer)

-      (funcall (lisp-stream-n-bin stream)
+      (funcall (ansi-stream-n-bin stream)

               stream
               buffer
               start
               numbytes
               eof-error-p))
      ((<= numbytes num-buffered)
               stream
               buffer
               start
               numbytes
               eof-error-p))
      ((<= numbytes num-buffered)

+      #+nil
+      (let ((copy-function (typecase buffer
+                             ((simple-array * (*)) #'ub8-bash-copy)
+                             (system-area-pointer #'copy-ub8-to-system-area))))
+        (funcall copy-function in-buffer index buffer start numbytes))

       (%byte-blt in-buffer index
                 buffer start (+ start numbytes))
       (%byte-blt in-buffer index
                 buffer start (+ start numbytes))

-      (setf (lisp-stream-in-index stream) (+ index numbytes))
+      (setf (ansi-stream-in-index stream) (+ index numbytes))

       numbytes)
      (t
       (let ((end (+ start num-buffered)))
       numbytes)
      (t
       (let ((end (+ start num-buffered)))

-       (%byte-blt in-buffer index buffer start end)
-       (setf (lisp-stream-in-index stream) +in-buffer-length+)
-       (+ (funcall (lisp-stream-n-bin stream)
+       #+nil
+        (let ((copy-function (typecase buffer
+                             ((simple-array * (*)) #'ub8-bash-copy)
+                             (system-area-pointer #'copy-ub8-to-system-area))))
+          (funcall copy-function in-buffer index buffer start num-buffered))
+        (%byte-blt in-buffer index buffer start end)
+       (setf (ansi-stream-in-index stream) +ansi-stream-in-buffer-length+)
+       (+ (funcall (ansi-stream-n-bin stream)

                    stream
                    buffer
                    end
                    stream
                    buffer
                    end

@@ -493,246 +438,260 @@
 ;;; unreading
 ;;;
 ;;; (It's 4 instead of 1 to allow word-aligned copies.)
 ;;; unreading
 ;;;
 ;;; (It's 4 instead of 1 to allow word-aligned copies.)

-(defconstant +in-buffer-extra+ 4) ; FIXME: should be symbolic constant
+(defconstant +ansi-stream-in-buffer-extra+
+  4) ; FIXME: should be symbolic constant

 
 ;;; This function is called by the FAST-READ-CHAR expansion to refill
 ;;; the IN-BUFFER for text streams. There is definitely an IN-BUFFER,
 ;;; and hence must be an N-BIN method.
 (defun fast-read-char-refill (stream eof-error-p eof-value)
 
 ;;; This function is called by the FAST-READ-CHAR expansion to refill
 ;;; the IN-BUFFER for text streams. There is definitely an IN-BUFFER,
 ;;; and hence must be an N-BIN method.
 (defun fast-read-char-refill (stream eof-error-p eof-value)

-  (let* ((ibuf (lisp-stream-in-buffer stream))
-        (count (funcall (lisp-stream-n-bin stream)
-                        stream
-                        ibuf
-                        +in-buffer-extra+
-                        (- +in-buffer-length+ +in-buffer-extra+)
-                        nil))
-        (start (- +in-buffer-length+ count)))
+  (let* ((ibuf (ansi-stream-cin-buffer stream))
+         (count (funcall (ansi-stream-n-bin stream)
+                         stream
+                         ibuf
+                         +ansi-stream-in-buffer-extra+
+                         (- +ansi-stream-in-buffer-length+
+                            +ansi-stream-in-buffer-extra+)
+                         nil))
+         (start (- +ansi-stream-in-buffer-length+ count)))

     (declare (type index start count))
     (cond ((zerop count)
     (declare (type index start count))
     (cond ((zerop count)

-          (setf (lisp-stream-in-index stream) +in-buffer-length+)
-          (funcall (lisp-stream-in stream) stream eof-error-p eof-value))
-         (t
-          (when (/= start +in-buffer-extra+)
-            (bit-bash-copy ibuf (+ (* +in-buffer-extra+ sb!vm:byte-bits)
-                                   (* sb!vm:vector-data-offset
-                                      sb!vm:word-bits))
-                           ibuf (+ (the index (* start sb!vm:byte-bits))
-                                   (* sb!vm:vector-data-offset
-                                      sb!vm:word-bits))
-                           (* count sb!vm:byte-bits)))
-          (setf (lisp-stream-in-index stream) (1+ start))
-          (code-char (aref ibuf start))))))
+           (setf (ansi-stream-in-index stream)
+                 +ansi-stream-in-buffer-length+)
+           (funcall (ansi-stream-in stream) stream eof-error-p eof-value))
+          (t
+           (when (/= start +ansi-stream-in-buffer-extra+)
+             (#.(let* ((n-character-array-bits
+                        (sb!vm:saetp-n-bits
+                         (find 'character
+                               sb!vm:*specialized-array-element-type-properties*
+                               :key #'sb!vm:saetp-specifier)))
+                       (bash-function (intern (format nil "UB~D-BASH-COPY" n-character-array-bits)
+                                              (find-package "SB!KERNEL"))))
+                  bash-function)
+                ibuf +ansi-stream-in-buffer-extra+
+                ibuf start
+                count))
+           (setf (ansi-stream-in-index stream) (1+ start))
+           (aref ibuf start)))))

 
 ;;; This is similar to FAST-READ-CHAR-REFILL, but we don't have to
 ;;; leave room for unreading.
 (defun fast-read-byte-refill (stream eof-error-p eof-value)
 
 ;;; This is similar to FAST-READ-CHAR-REFILL, but we don't have to
 ;;; leave room for unreading.
 (defun fast-read-byte-refill (stream eof-error-p eof-value)

-  (let* ((ibuf (lisp-stream-in-buffer stream))
-        (count (funcall (lisp-stream-n-bin stream) stream
-                        ibuf 0 +in-buffer-length+
+  (let* ((ibuf (ansi-stream-in-buffer stream))
+        (count (funcall (ansi-stream-n-bin stream) stream
+                        ibuf 0 +ansi-stream-in-buffer-length+

                         nil))
                         nil))

-        (start (- +in-buffer-length+ count)))
+        (start (- +ansi-stream-in-buffer-length+ count)))

     (declare (type index start count))
     (cond ((zerop count)
     (declare (type index start count))
     (cond ((zerop count)

-          (setf (lisp-stream-in-index stream) +in-buffer-length+)
-          (funcall (lisp-stream-bin stream) stream eof-error-p eof-value))
+          (setf (ansi-stream-in-index stream) +ansi-stream-in-buffer-length+)
+          (funcall (ansi-stream-bin stream) stream eof-error-p eof-value))

          (t
           (unless (zerop start)
          (t
           (unless (zerop start)

-            (bit-bash-copy ibuf (* sb!vm:vector-data-offset sb!vm:word-bits)
-                           ibuf (+ (the index (* start sb!vm:byte-bits))
-                                   (* sb!vm:vector-data-offset
-                                      sb!vm:word-bits))
-                           (* count sb!vm:byte-bits)))
-          (setf (lisp-stream-in-index stream) (1+ start))
+             (ub8-bash-copy ibuf 0
+                            ibuf start 
+                            count))
+          (setf (ansi-stream-in-index stream) (1+ start))

           (aref ibuf start)))))
 \f
 ;;; output functions
 
 (defun write-char (character &optional (stream *standard-output*))
           (aref ibuf start)))))
 \f
 ;;; output functions
 
 (defun write-char (character &optional (stream *standard-output*))

-  (with-out-stream stream (lisp-stream-out character)
+  (with-out-stream stream (ansi-stream-out character)

                   (stream-write-char character))
   character)
 
 (defun terpri (&optional (stream *standard-output*))
                   (stream-write-char character))
   character)
 
 (defun terpri (&optional (stream *standard-output*))

-  (with-out-stream stream (lisp-stream-out #\newline) (stream-terpri))
+  (with-out-stream stream (ansi-stream-out #\newline) (stream-terpri))

   nil)
 
   nil)
 

+#!-sb-fluid (declaim (inline ansi-stream-fresh-line))
+(defun ansi-stream-fresh-line (stream)
+  (when (/= (or (charpos stream) 1) 0)
+    (funcall (ansi-stream-out stream) stream #\newline)
+    t))
+

 (defun fresh-line (&optional (stream *standard-output*))
   (let ((stream (out-synonym-of stream)))
 (defun fresh-line (&optional (stream *standard-output*))
   (let ((stream (out-synonym-of stream)))

-    (if (lisp-stream-p stream)
-       (when (/= (or (charpos stream) 1) 0)
-         (funcall (lisp-stream-out stream) stream #\newline)
-         t)
+    (if (ansi-stream-p stream)
+       (ansi-stream-fresh-line stream)

        ;; must be Gray streams FUNDAMENTAL-STREAM
        (stream-fresh-line stream))))
 
 (defun write-string (string &optional (stream *standard-output*)
        ;; must be Gray streams FUNDAMENTAL-STREAM
        (stream-fresh-line stream))))
 
 (defun write-string (string &optional (stream *standard-output*)

-                           &key (start 0) (end (length (the string string))))
-
-  ;; FIXME: These SETFs don't look right to me. Looking at the
-  ;; definition of "bounding indices" in the glossary of the ANSI
-  ;; spec, and extrapolating from the behavior of other operations
-  ;; when their operands are the wrong type, it seems that it would be
-  ;; more correct to essentially
-  ;;    (AVER (<= 0 START END (LENGTH STRING)))
-  ;; instead of modifying the incorrect values.
-  #!+high-security
-  (setf end (min end (length (the vector string))))
-  #!+high-security
-  (setf start (max start 0))
-
-  ;; FIXME: And I'd just signal a non-continuable error..
-  #!+high-security
-  (when (< end start)
-      (cerror "Continue with switched start and end ~S <-> ~S"
-             "Write-string: start (~S) and end (~S) exchanged."
-             start end string)
-      (rotatef start end))
-
-  (write-string* string stream start end))
-
-(defun write-string* (string &optional (stream *standard-output*)
-                            (start 0) (end (length (the vector string))))
-  (declare (fixnum start end))
-  (let ((stream (out-synonym-of stream)))
-    (cond ((lisp-stream-p stream)
-          (if (array-header-p string)
-              (with-array-data ((data string) (offset-start start)
-                                (offset-end end))
-                (funcall (lisp-stream-sout stream)
-                         stream data offset-start offset-end))
-              (funcall (lisp-stream-sout stream) stream string start end))
-          string)
-         (t ; must be Gray streams FUNDAMENTAL-STREAM
-          (stream-write-string stream string start end)))))
+                           &key (start 0) end)
+  (declare (type string string))
+  ;; Note that even though you might expect, based on the behavior of
+  ;; things like AREF, that the correct upper bound here is
+  ;; (ARRAY-DIMENSION STRING 0), the ANSI glossary definitions for
+  ;; "bounding index" and "length" indicate that in this case (i.e.
+  ;; for the ANSI-specified functions WRITE-STRING [and WRITE-LINE]),
+  ;; (LENGTH STRING) is the required upper bound. A foolish
+  ;; consistency is the hobgoblin of lesser languages..
+  (%write-string string stream start (%check-vector-sequence-bounds
+                                     string start end))
+  string)

 
 

-(defun write-line (string &optional (stream *standard-output*)
-                         &key (start 0) (end (length string)))
-  (write-line* string stream start end))
+#!-sb-fluid (declaim (inline ansi-stream-write-string))
+(defun ansi-stream-write-string (string stream start end)
+  (declare (type string string))
+  (declare (type ansi-stream stream))
+  (declare (type index start end))
+  (if (array-header-p string)
+      (with-array-data ((data string) (offset-start start)
+                        (offset-end end))
+        (funcall (ansi-stream-sout stream)
+                 stream data offset-start offset-end))
+      (funcall (ansi-stream-sout stream) stream string start end))
+  string)

 
 

-(defun write-line* (string &optional (stream *standard-output*)
-                          (start 0) (end (length string)))
-  (declare (fixnum start end))
+(defun %write-string (string stream start end)
+  (declare (type string string))
+  (declare (type stream-designator stream))
+  (declare (type index start end))

   (let ((stream (out-synonym-of stream)))
   (let ((stream (out-synonym-of stream)))

-    (cond ((lisp-stream-p stream)
-          (if (array-header-p string)
-              (with-array-data ((data string) (offset-start start)
-                                (offset-end end))
-                (with-out-stream stream (lisp-stream-sout data offset-start
-                                                          offset-end)))
-              (with-out-stream stream (lisp-stream-sout string start end)))
-          (funcall (lisp-stream-out stream) stream #\newline))
-         (t ; must be Gray streams FUNDAMENTAL-STREAM
-          (stream-write-string stream string start end)
-          (stream-write-char stream #\Newline)))
-    string))
+    (if(ansi-stream-p stream)
+       (ansi-stream-write-string string stream start end)
+       ;; must be Gray streams FUNDAMENTAL-STREAM
+       (stream-write-string stream string start end))))
+
+;;; A wrapper function for all those (MACROLET OUT-FUN) definitions,
+;;; which cannot deal with keyword arguments.
+(declaim (inline write-string-no-key))
+(defun write-string-no-key (string stream start end)
+  (write-string string stream :start start :end end))
+
+(defun write-line (string &optional (stream *standard-output*)
+                         &key (start 0) end)
+  (declare (type string string))
+  ;; FIXME: Why is there this difference between the treatments of the
+  ;; STREAM argument in WRITE-STRING and WRITE-LINE?
+  (let ((defaulted-stream (out-synonym-of stream)))
+    (%write-string string defaulted-stream start (%check-vector-sequence-bounds
+                                                 string start end))
+    (write-char #\newline defaulted-stream))
+  string)

 
 (defun charpos (&optional (stream *standard-output*))
 
 (defun charpos (&optional (stream *standard-output*))

-  (with-out-stream stream (lisp-stream-misc :charpos) (stream-line-column)))
+  (with-out-stream stream (ansi-stream-misc :charpos) (stream-line-column)))

 
 (defun line-length (&optional (stream *standard-output*))
 
 (defun line-length (&optional (stream *standard-output*))

-  (with-out-stream stream (lisp-stream-misc :line-length)
+  (with-out-stream stream (ansi-stream-misc :line-length)

                   (stream-line-length)))
 
 (defun finish-output (&optional (stream *standard-output*))
                   (stream-line-length)))
 
 (defun finish-output (&optional (stream *standard-output*))

-  (with-out-stream stream (lisp-stream-misc :finish-output)
+  (with-out-stream stream (ansi-stream-misc :finish-output)

                   (stream-finish-output))
   nil)
 
 (defun force-output (&optional (stream *standard-output*))
                   (stream-finish-output))
   nil)
 
 (defun force-output (&optional (stream *standard-output*))

-  (with-out-stream stream (lisp-stream-misc :force-output)
+  (with-out-stream stream (ansi-stream-misc :force-output)

                   (stream-force-output))
   nil)
 
 (defun clear-output (&optional (stream *standard-output*))
                   (stream-force-output))
   nil)
 
 (defun clear-output (&optional (stream *standard-output*))

-  (with-out-stream stream (lisp-stream-misc :clear-output)
+  (with-out-stream stream (ansi-stream-misc :clear-output)

                   (stream-force-output))
   nil)
 
 (defun write-byte (integer stream)
                   (stream-force-output))
   nil)
 
 (defun write-byte (integer stream)

-  (with-out-stream stream (lisp-stream-bout integer)
+  (with-out-stream stream (ansi-stream-bout integer)

                   (stream-write-byte integer))
   integer)
 \f
                   (stream-write-byte integer))
   integer)
 \f

-;;; This is called from LISP-STREAM routines that encapsulate CLOS
+
+;;; (These were inline throughout this file, but that's not appropriate
+;;; globally.  And we must not inline them in the rest of this file if
+;;; dispatch to gray or simple streams is to work, since both redefine
+;;; these functions later.)
+(declaim (notinline read-char unread-char read-byte listen))
+
+;;; This is called from ANSI-STREAM routines that encapsulate CLOS

 ;;; streams to handle the misc routines and dispatch to the
 ;;; streams to handle the misc routines and dispatch to the

-;;; appropriate Gray stream functions.
+;;; appropriate SIMPLE- or FUNDAMENTAL-STREAM functions.

 (defun stream-misc-dispatch (stream operation &optional arg1 arg2)
 (defun stream-misc-dispatch (stream operation &optional arg1 arg2)

-  (declare (type fundamental-stream stream)
-          (ignore arg2))
-  (case operation
+  (declare (type stream stream) (ignore arg2))
+  (ecase operation

     (:listen
      ;; Return T if input available, :EOF for end-of-file, otherwise NIL.
     (:listen
      ;; Return T if input available, :EOF for end-of-file, otherwise NIL.

-     (let ((char (stream-read-char-no-hang stream)))
+     (let ((char (read-char-no-hang stream nil :eof)))

        (when (characterp char)
        (when (characterp char)

-        (stream-unread-char stream char))
+        (unread-char char stream))

        char))
     (:unread
        char))
     (:unread

-     (stream-unread-char stream arg1))
+     (unread-char arg1 stream))

     (:close
      (close stream))
     (:clear-input
     (:close
      (close stream))
     (:clear-input

-     (stream-clear-input stream))
+     (clear-input stream))

     (:force-output
     (:force-output

-     (stream-force-output stream))
+     (force-output stream))

     (:finish-output
     (:finish-output

-     (stream-finish-output stream))
+     (finish-output stream))

     (:element-type
      (stream-element-type stream))
     (:element-type
      (stream-element-type stream))

+    (:stream-external-format
+     (stream-external-format stream))

     (:interactive-p
      (interactive-stream-p stream))
     (:line-length
     (:interactive-p
      (interactive-stream-p stream))
     (:line-length

-     (stream-line-length stream))
+     (line-length stream))

     (:charpos
     (:charpos

-     (stream-line-column stream))
+     (charpos stream))

     (:file-length
      (file-length stream))
     (:file-length
      (file-length stream))

+    (:file-string-length
+     (file-string-length stream arg1))

     (:file-position
      (file-position stream arg1))))
 \f
 ;;;; broadcast streams
 
     (:file-position
      (file-position stream arg1))))
 \f
 ;;;; broadcast streams
 

-(defstruct (broadcast-stream (:include lisp-stream
+(defstruct (broadcast-stream (:include ansi-stream

                                       (out #'broadcast-out)
                                       (bout #'broadcast-bout)
                                       (sout #'broadcast-sout)
                                       (misc #'broadcast-misc))
                                       (out #'broadcast-out)
                                       (bout #'broadcast-bout)
                                       (sout #'broadcast-sout)
                                       (misc #'broadcast-misc))

-                            (:constructor #!-high-security-support
-                                          make-broadcast-stream
-                                          #!+high-security-support
-                                          %make-broadcast-stream (&rest
-                                                                  streams))
+                            (:constructor %make-broadcast-stream
+                                          (&rest streams))

                             (:copier nil))
   ;; a list of all the streams we broadcast to
   (streams () :type list :read-only t))
 
                             (:copier nil))
   ;; a list of all the streams we broadcast to
   (streams () :type list :read-only t))
 

-#!+high-security-support

 (defun make-broadcast-stream (&rest streams)
   (dolist (stream streams)
 (defun make-broadcast-stream (&rest streams)
   (dolist (stream streams)

-    (unless (or (and (synonym-stream-p stream)
-                    (output-stream-p (symbol-value
-                                      (synonym-stream-symbol stream))))
-               (output-stream-p stream))
+    (unless (output-stream-p stream)

       (error 'type-error
             :datum stream
             :expected-type '(satisfies output-stream-p))))
   (apply #'%make-broadcast-stream streams))
 
       (error 'type-error
             :datum stream
             :expected-type '(satisfies output-stream-p))))
   (apply #'%make-broadcast-stream streams))
 

-(macrolet ((out-fun (fun method stream-method &rest args)
-            `(defun ,fun (stream ,@args)
+(macrolet ((out-fun (name fun &rest args)
+            `(defun ,name (stream ,@args)

                (dolist (stream (broadcast-stream-streams stream))
                (dolist (stream (broadcast-stream-streams stream))

-                 (if (lisp-stream-p stream)
-                     (funcall (,method stream) stream ,@args)
-                     (,stream-method stream ,@args))))))
-  (out-fun broadcast-out lisp-stream-out stream-write-char char)
-  (out-fun broadcast-bout lisp-stream-bout stream-write-byte byte)
-  (out-fun broadcast-sout lisp-stream-sout stream-write-string
-          string start end))
+                 (,fun ,(car args) stream ,@(cdr args))))))
+  (out-fun broadcast-out write-char char)
+  (out-fun broadcast-bout write-byte byte)
+  (out-fun broadcast-sout write-string-no-key string start end))

 
 (defun broadcast-misc (stream operation &optional arg1 arg2)
   (let ((streams (broadcast-stream-streams stream)))
     (case operation
 
 (defun broadcast-misc (stream operation &optional arg1 arg2)
   (let ((streams (broadcast-stream-streams stream)))
     (case operation

+      ;; FIXME: This may not be the best place to note this, but I
+      ;; think the :CHARPOS protocol needs revision.  Firstly, I think
+      ;; this is the last place where a NULL return value was possible
+      ;; (before adjusting it to be 0), so a bunch of conditionals IF
+      ;; CHARPOS can be removed; secondly, it is my belief that
+      ;; FD-STREAMS, when running FILE-POSITION, do not update the
+      ;; CHARPOS, and consequently there will be much wrongness.
+      ;;
+      ;; FIXME: see also TWO-WAY-STREAM treatment of :CHARPOS -- why
+      ;; is it testing the :charpos of an input stream?
+      ;;
+      ;; -- CSR, 2004-02-04

       (:charpos
       (:charpos

-       (dolist (stream streams)
+       (dolist (stream streams 0)

         (let ((charpos (charpos stream)))
           (if charpos (return charpos)))))
       (:line-length
         (let ((charpos (charpos stream)))
           (if charpos (return charpos)))))
       (:line-length

@@ -741,22 +700,51 @@
           (let ((res (line-length stream)))
             (when res (setq min (if min (min res min) res)))))))
       (:element-type
           (let ((res (line-length stream)))
             (when res (setq min (if min (min res min) res)))))))
       (:element-type

+       #+nil ; old, arguably more logical, version

        (let (res)
        (let (res)

-        (dolist (stream streams (if (> (length res) 1) `(and ,@res) res))
-          (pushnew (stream-element-type stream) res :test #'equal))))
-      (:close)
+        (dolist (stream streams (if (> (length res) 1) `(and ,@res) t))
+          (pushnew (stream-element-type stream) res :test #'equal)))
+       ;; ANSI-specified version (under System Class BROADCAST-STREAM)
+       (let ((res t))
+        (do ((streams streams (cdr streams)))
+            ((null streams) res)
+          (when (null (cdr streams))
+            (setq res (stream-element-type (car streams)))))))
+      (:external-format
+       (let ((res :default))
+        (dolist (stream streams res)
+          (setq res (stream-external-format stream)))))
+      (:file-length
+       (let ((last (last streams)))
+        (if last            
+            (file-length (car last))
+            0)))
+      (:file-position
+       (if arg1
+          (let ((res (or (eql arg1 :start) (eql arg1 0))))
+            (dolist (stream streams res)
+              (setq res (file-position stream arg1))))
+          (let ((res 0))
+            (dolist (stream streams res)
+              (setq res (file-position stream))))))
+      (:file-string-length
+       (let ((res 1))
+        (dolist (stream streams res)
+          (setq res (file-string-length stream arg1)))))
+      (:close
+       (set-closed-flame stream))

       (t
        (let ((res nil))
         (dolist (stream streams res)
           (setq res
       (t
        (let ((res nil))
         (dolist (stream streams res)
           (setq res

-                (if (lisp-stream-p stream)
-                    (funcall (lisp-stream-misc stream) stream operation
+                (if (ansi-stream-p stream)
+                    (funcall (ansi-stream-misc stream) stream operation

                              arg1 arg2)
                     (stream-misc-dispatch stream operation arg1 arg2)))))))))
 \f
 ;;;; synonym streams
 
                              arg1 arg2)
                     (stream-misc-dispatch stream operation arg1 arg2)))))))))
 \f
 ;;;; synonym streams
 

-(defstruct (synonym-stream (:include lisp-stream
+(defstruct (synonym-stream (:include ansi-stream

                                     (in #'synonym-in)
                                     (bin #'synonym-bin)
                                     (n-bin #'synonym-n-bin)
                                     (in #'synonym-in)
                                     (bin #'synonym-bin)
                                     (n-bin #'synonym-n-bin)

@@ -772,18 +760,16 @@
   (print-unreadable-object (x stream :type t :identity t)
     (format stream ":SYMBOL ~S" (synonym-stream-symbol x))))
 
   (print-unreadable-object (x stream :type t :identity t)
     (format stream ":SYMBOL ~S" (synonym-stream-symbol x))))
 

-;;; The output simple output methods just call the corresponding method
-;;; in the synonymed stream.
-(macrolet ((out-fun (name slot stream-method &rest args)
+;;; The output simple output methods just call the corresponding
+;;; function on the synonymed stream.
+(macrolet ((out-fun (name fun &rest args)

             `(defun ,name (stream ,@args)
                (declare (optimize (safety 1)))
                (let ((syn (symbol-value (synonym-stream-symbol stream))))
             `(defun ,name (stream ,@args)
                (declare (optimize (safety 1)))
                (let ((syn (symbol-value (synonym-stream-symbol stream))))

-                 (if (lisp-stream-p syn)
-                     (funcall (,slot syn) syn ,@args)
-                     (,stream-method syn ,@args))))))
-  (out-fun synonym-out lisp-stream-out stream-write-char ch)
-  (out-fun synonym-bout lisp-stream-bout stream-write-byte n)
-  (out-fun synonym-sout lisp-stream-sout stream-write-string string start end))
+                 (,fun ,(car args) syn ,@(cdr args))))))
+  (out-fun synonym-out write-char ch)
+  (out-fun synonym-bout write-byte n)
+  (out-fun synonym-sout write-string-no-key string start end))

 
 ;;; For the input methods, we just call the corresponding function on the
 ;;; synonymed stream. These functions deal with getting input out of
 
 ;;; For the input methods, we just call the corresponding function on the
 ;;; synonymed stream. These functions deal with getting input out of

@@ -800,24 +786,24 @@
 (defun synonym-misc (stream operation &optional arg1 arg2)
   (declare (optimize (safety 1)))
   (let ((syn (symbol-value (synonym-stream-symbol stream))))
 (defun synonym-misc (stream operation &optional arg1 arg2)
   (declare (optimize (safety 1)))
   (let ((syn (symbol-value (synonym-stream-symbol stream))))

-    (if (lisp-stream-p syn)
+    (if (ansi-stream-p syn)

        ;; We have to special-case some operations which interact with
        ;; the in-buffer of the wrapped stream, since just calling
        ;; We have to special-case some operations which interact with
        ;; the in-buffer of the wrapped stream, since just calling

-       ;; LISP-STREAM-MISC on them
+       ;; ANSI-STREAM-MISC on them

        (case operation
        (case operation

-         (:listen (or (/= (the fixnum (lisp-stream-in-index syn))
-                          +in-buffer-length+)
-                      (funcall (lisp-stream-misc syn) syn :listen)))
+         (:listen (or (/= (the fixnum (ansi-stream-in-index syn))
+                          +ansi-stream-in-buffer-length+)
+                      (funcall (ansi-stream-misc syn) syn :listen)))

           (:clear-input (clear-input syn))
           (:unread (unread-char arg1 syn))
          (t
           (:clear-input (clear-input syn))
           (:unread (unread-char arg1 syn))
          (t

-          (funcall (lisp-stream-misc syn) syn operation arg1 arg2)))
+          (funcall (ansi-stream-misc syn) syn operation arg1 arg2)))

        (stream-misc-dispatch syn operation arg1 arg2))))
 \f
 ;;;; two-way streams
 
 (defstruct (two-way-stream
        (stream-misc-dispatch syn operation arg1 arg2))))
 \f
 ;;;; two-way streams
 
 (defstruct (two-way-stream

-           (:include lisp-stream
+           (:include ansi-stream

                      (in #'two-way-in)
                      (bin #'two-way-bin)
                      (n-bin #'two-way-n-bin)
                      (in #'two-way-in)
                      (bin #'two-way-bin)
                      (n-bin #'two-way-n-bin)

@@ -825,52 +811,36 @@
                      (bout #'two-way-bout)
                      (sout #'two-way-sout)
                      (misc #'two-way-misc))
                      (bout #'two-way-bout)
                      (sout #'two-way-sout)
                      (misc #'two-way-misc))

-           (:constructor #!-high-security-support
-                         make-two-way-stream
-                         #!+high-security-support
-                         %make-two-way-stream (input-stream output-stream))
+           (:constructor %make-two-way-stream (input-stream output-stream))

            (:copier nil))
            (:copier nil))

-  (input-stream (required-argument) :type stream :read-only t)
-  (output-stream (required-argument) :type stream :read-only t))
+  (input-stream (missing-arg) :type stream :read-only t)
+  (output-stream (missing-arg) :type stream :read-only t))

 (defprinter (two-way-stream) input-stream output-stream)
 
 (defprinter (two-way-stream) input-stream output-stream)
 

-#!-high-security-support
-(setf (fdocumentation 'make-two-way-stream 'function)
-  "Return a bidirectional stream which gets its input from Input-Stream and
-   sends its output to Output-Stream.")
-#!+high-security-support

 (defun make-two-way-stream (input-stream output-stream)
   #!+sb-doc
 (defun make-two-way-stream (input-stream output-stream)
   #!+sb-doc

-  "Return a bidirectional stream which gets its input from Input-Stream and
-   sends its output to Output-Stream."
+  "Return a bidirectional stream which gets its input from INPUT-STREAM and
+   sends its output to OUTPUT-STREAM."

   ;; FIXME: This idiom of the-real-stream-of-a-possibly-synonym-stream
   ;; should be encapsulated in a function, and used here and most of
   ;; the other places that SYNONYM-STREAM-P appears.
   ;; FIXME: This idiom of the-real-stream-of-a-possibly-synonym-stream
   ;; should be encapsulated in a function, and used here and most of
   ;; the other places that SYNONYM-STREAM-P appears.

-  (unless (or (and (synonym-stream-p output-stream)
-                  (output-stream-p (symbol-value
-                                    (synonym-stream-symbol output-stream))))
-             (output-stream-p output-stream))
+  (unless (output-stream-p output-stream)

     (error 'type-error
           :datum output-stream
           :expected-type '(satisfies output-stream-p)))
     (error 'type-error
           :datum output-stream
           :expected-type '(satisfies output-stream-p)))

-  (unless (or (and (synonym-stream-p input-stream)
-                  (input-stream-p (symbol-value
-                                   (synonym-stream-symbol input-stream))))
-             (input-stream-p input-stream))
+  (unless (input-stream-p input-stream)

     (error 'type-error
           :datum input-stream
           :expected-type '(satisfies input-stream-p)))
   (funcall #'%make-two-way-stream input-stream output-stream))
 
     (error 'type-error
           :datum input-stream
           :expected-type '(satisfies input-stream-p)))
   (funcall #'%make-two-way-stream input-stream output-stream))
 

-(macrolet ((out-fun (name slot stream-method &rest args)
+(macrolet ((out-fun (name fun &rest args)

             `(defun ,name (stream ,@args)
                (let ((syn (two-way-stream-output-stream stream)))
             `(defun ,name (stream ,@args)
                (let ((syn (two-way-stream-output-stream stream)))

-                 (if (lisp-stream-p syn)
-                     (funcall (,slot syn) syn ,@args)
-                     (,stream-method syn ,@args))))))
-  (out-fun two-way-out lisp-stream-out stream-write-char ch)
-  (out-fun two-way-bout lisp-stream-bout stream-write-byte n)
-  (out-fun two-way-sout lisp-stream-sout stream-write-string string start end))
+                 (,fun ,(car args) syn ,@(cdr args))))))
+  (out-fun two-way-out write-char ch)
+  (out-fun two-way-bout write-byte n)
+  (out-fun two-way-sout write-string-no-key string start end))

 
 (macrolet ((in-fun (name fun &rest args)
             `(defun ,name (stream ,@args)
 
 (macrolet ((in-fun (name fun &rest args)
             `(defun ,name (stream ,@args)

@@ -883,17 +853,18 @@
 (defun two-way-misc (stream operation &optional arg1 arg2)
   (let* ((in (two-way-stream-input-stream stream))
         (out (two-way-stream-output-stream stream))
 (defun two-way-misc (stream operation &optional arg1 arg2)
   (let* ((in (two-way-stream-input-stream stream))
         (out (two-way-stream-output-stream stream))

-        (in-lisp-stream-p (lisp-stream-p in))
-        (out-lisp-stream-p (lisp-stream-p out)))
+        (in-ansi-stream-p (ansi-stream-p in))
+        (out-ansi-stream-p (ansi-stream-p out)))

     (case operation
       (:listen
     (case operation
       (:listen

-       (if in-lisp-stream-p
-          (or (/= (the fixnum (lisp-stream-in-index in)) +in-buffer-length+)
-              (funcall (lisp-stream-misc in) in :listen))
-          (stream-listen in)))
+       (if in-ansi-stream-p
+          (or (/= (the fixnum (ansi-stream-in-index in))
+                  +ansi-stream-in-buffer-length+)
+              (funcall (ansi-stream-misc in) in :listen))
+          (listen in)))

       ((:finish-output :force-output :clear-output)
       ((:finish-output :force-output :clear-output)

-       (if out-lisp-stream-p
-          (funcall (lisp-stream-misc out) out operation arg1 arg2)
+       (if out-ansi-stream-p
+          (funcall (ansi-stream-misc out) out operation arg1 arg2)

           (stream-misc-dispatch out operation arg1 arg2)))
       (:clear-input (clear-input in))
       (:unread (unread-char arg1 in))
           (stream-misc-dispatch out operation arg1 arg2)))
       (:clear-input (clear-input in))
       (:unread (unread-char arg1 in))

@@ -905,58 +876,37 @@
       (:close
        (set-closed-flame stream))
       (t
       (:close
        (set-closed-flame stream))
       (t

-       (or (if in-lisp-stream-p
-              (funcall (lisp-stream-misc in) in operation arg1 arg2)
+       (or (if in-ansi-stream-p
+              (funcall (ansi-stream-misc in) in operation arg1 arg2)

               (stream-misc-dispatch in operation arg1 arg2))
               (stream-misc-dispatch in operation arg1 arg2))

-          (if out-lisp-stream-p
-              (funcall (lisp-stream-misc out) out operation arg1 arg2)
+          (if out-ansi-stream-p
+              (funcall (ansi-stream-misc out) out operation arg1 arg2)

               (stream-misc-dispatch out operation arg1 arg2)))))))
 \f
 ;;;; concatenated streams
 
 (defstruct (concatenated-stream
               (stream-misc-dispatch out operation arg1 arg2)))))))
 \f
 ;;;; concatenated streams
 
 (defstruct (concatenated-stream

-           (:include lisp-stream
+           (:include ansi-stream

                      (in #'concatenated-in)
                      (bin #'concatenated-bin)
                      (n-bin #'concatenated-n-bin)
                      (misc #'concatenated-misc))
                      (in #'concatenated-in)
                      (bin #'concatenated-bin)
                      (n-bin #'concatenated-n-bin)
                      (misc #'concatenated-misc))

-           (:constructor
-            #!-high-security-support make-concatenated-stream
-            #!+high-security-support %make-concatenated-stream
-                (&rest streams &aux (current streams)))
+           (:constructor %make-concatenated-stream (&rest streams))

            (:copier nil))
   ;; The car of this is the substream we are reading from now.
            (:copier nil))
   ;; The car of this is the substream we are reading from now.

-  current
-  ;; This is a list of all the substreams there ever were. We need to
-  ;; remember them so that we can close them.
-  ;;
-  ;; FIXME: ANSI says this is supposed to be the list of streams that
-  ;; we still have to read from. So either this needs to become a
-  ;; private member %STREAM (with CONCATENATED-STREAM-STREAMS a wrapper
-  ;; around it which discards closed files from the head of the list)
-  ;; or we need to update it as we run out of files.
-  (streams nil :type list :read-only t))
+  (streams nil :type list))

 (def!method print-object ((x concatenated-stream) stream)
   (print-unreadable-object (x stream :type t :identity t)
     (format stream
            ":STREAMS ~S"
            (concatenated-stream-streams x))))
 
 (def!method print-object ((x concatenated-stream) stream)
   (print-unreadable-object (x stream :type t :identity t)
     (format stream
            ":STREAMS ~S"
            (concatenated-stream-streams x))))
 

-#!-high-security-support
-(setf (fdocumentation 'make-concatenated-stream 'function)
-  "Returns a stream which takes its input from each of the Streams in turn,
-   going on to the next at EOF.")
-
-#!+high-security-support

 (defun make-concatenated-stream (&rest streams)
   #!+sb-doc
 (defun make-concatenated-stream (&rest streams)
   #!+sb-doc

-  "Returns a stream which takes its input from each of the Streams in turn,
+  "Return a stream which takes its input from each of the streams in turn,

    going on to the next at EOF."
   (dolist (stream streams)
    going on to the next at EOF."
   (dolist (stream streams)

-    (unless (or (and (synonym-stream-p stream)
-                    (input-stream-p (symbol-value
-                                     (synonym-stream-symbol stream))))
-               (input-stream-p stream))
+    (unless (input-stream-p stream)

       (error 'type-error
             :datum stream
             :expected-type '(satisfies input-stream-p))))
       (error 'type-error
             :datum stream
             :expected-type '(satisfies input-stream-p))))

@@ -964,66 +914,68 @@
 
 (macrolet ((in-fun (name fun)
             `(defun ,name (stream eof-error-p eof-value)
 
 (macrolet ((in-fun (name fun)
             `(defun ,name (stream eof-error-p eof-value)

-               (do ((current (concatenated-stream-current stream)
-                             (cdr current)))
-                   ((null current)
+               (do ((streams (concatenated-stream-streams stream)
+                             (cdr streams)))
+                   ((null streams)

                     (eof-or-lose stream eof-error-p eof-value))
                     (eof-or-lose stream eof-error-p eof-value))

-                 (let* ((stream (car current))
+                 (let* ((stream (car streams))

                         (result (,fun stream nil nil)))
                    (when result (return result)))
                         (result (,fun stream nil nil)))
                    (when result (return result)))

-                 (setf (concatenated-stream-current stream) current)))))
+                 (pop (concatenated-stream-streams stream))))))

   (in-fun concatenated-in read-char)
   (in-fun concatenated-bin read-byte))
 
 (defun concatenated-n-bin (stream buffer start numbytes eof-errorp)
   (in-fun concatenated-in read-char)
   (in-fun concatenated-bin read-byte))
 
 (defun concatenated-n-bin (stream buffer start numbytes eof-errorp)

-  (do ((current (concatenated-stream-current stream) (cdr current))
+  (do ((streams (concatenated-stream-streams stream) (cdr streams))

        (current-start start)
        (remaining-bytes numbytes))
        (current-start start)
        (remaining-bytes numbytes))

-      ((null current)
+      ((null streams)

        (if eof-errorp
           (error 'end-of-file :stream stream)
           (- numbytes remaining-bytes)))
        (if eof-errorp
           (error 'end-of-file :stream stream)
           (- numbytes remaining-bytes)))

-    (let* ((stream (car current))
+    (let* ((stream (car streams))

            (bytes-read (read-n-bytes stream buffer current-start
                                     remaining-bytes nil)))
       (incf current-start bytes-read)
       (decf remaining-bytes bytes-read)
       (when (zerop remaining-bytes) (return numbytes)))
            (bytes-read (read-n-bytes stream buffer current-start
                                     remaining-bytes nil)))
       (incf current-start bytes-read)
       (decf remaining-bytes bytes-read)
       (when (zerop remaining-bytes) (return numbytes)))

-    (setf (concatenated-stream-current stream) (cdr current))))
+    (setf (concatenated-stream-streams stream) (cdr streams))))

 
 (defun concatenated-misc (stream operation &optional arg1 arg2)
 
 (defun concatenated-misc (stream operation &optional arg1 arg2)

-  (let ((left (concatenated-stream-current stream)))
-    (when left
-      (let* ((current (car left)))
-       (case operation
-         (:listen
-          (loop
-            (let ((stuff (if (lisp-stream-p current)
-                             (funcall (lisp-stream-misc current) current
-                                      :listen)
-                             (stream-misc-dispatch current :listen))))
-              (cond ((eq stuff :eof)
-                     ;; Advance CURRENT, and try again.
-                     (pop (concatenated-stream-current stream))
-                     (setf current
-                           (car (concatenated-stream-current stream)))
-                     (unless current
-                       ;; No further streams. EOF.
-                       (return :eof)))
-                    (stuff
-                     ;; Stuff's available.
-                     (return t))
-                    (t
-                     ;; Nothing is available yet.
-                     (return nil))))))
-          (:clear-input (clear-input current))
-          (:unread (unread-char arg1 current))
-          (:close
-          (set-closed-flame stream))
-         (t
-          (if (lisp-stream-p current)
-              (funcall (lisp-stream-misc current) current operation arg1 arg2)
-              (stream-misc-dispatch current operation arg1 arg2))))))))
+  (let* ((left (concatenated-stream-streams stream))
+        (current (car left)))
+    (case operation
+      (:listen
+       (unless left
+        (return-from concatenated-misc :eof))
+       (loop
+       (let ((stuff (if (ansi-stream-p current)
+                        (funcall (ansi-stream-misc current) current
+                                 :listen)
+                        (stream-misc-dispatch current :listen))))
+         (cond ((eq stuff :eof)
+                ;; Advance STREAMS, and try again.
+                (pop (concatenated-stream-streams stream))
+                (setf current
+                      (car (concatenated-stream-streams stream)))
+                (unless current
+                  ;; No further streams. EOF.
+                  (return :eof)))
+               (stuff
+                ;; Stuff's available.
+                (return t))
+               (t
+                ;; Nothing is available yet.
+                (return nil))))))
+      (:clear-input (when left (clear-input current)))
+      (:unread (when left (unread-char arg1 current)))
+      (:close
+       (set-closed-flame stream))
+      (t
+       (when left
+        (if (ansi-stream-p current)
+            (funcall (ansi-stream-misc current) current operation arg1 arg2)
+            (stream-misc-dispatch current operation arg1 arg2)))))))

 \f
 ;;;; echo streams
 
 \f
 ;;;; echo streams
 

@@ -1032,8 +984,8 @@
                      (in #'echo-in)
                      (bin #'echo-bin)
                      (misc #'echo-misc)
                      (in #'echo-in)
                      (bin #'echo-bin)
                      (misc #'echo-misc)

-                     (n-bin #'ill-bin))
-           (:constructor make-echo-stream (input-stream output-stream))
+                     (n-bin #'echo-n-bin))
+           (:constructor %make-echo-stream (input-stream output-stream))

            (:copier nil))
   unread-stuff)
 (def!method print-object ((x echo-stream) stream)
            (:copier nil))
   unread-stuff)
 (def!method print-object ((x echo-stream) stream)

@@ -1043,89 +995,99 @@
            (two-way-stream-input-stream x)
            (two-way-stream-output-stream x))))
 
            (two-way-stream-input-stream x)
            (two-way-stream-output-stream x))))
 

-(macrolet ((in-fun (name fun out-slot stream-method &rest args)
+(defun make-echo-stream (input-stream output-stream)
+  #!+sb-doc
+  "Return a bidirectional stream which gets its input from INPUT-STREAM and
+   sends its output to OUTPUT-STREAM. In addition, all input is echoed to
+   the output stream."
+  (unless (output-stream-p output-stream)
+    (error 'type-error
+          :datum output-stream
+          :expected-type '(satisfies output-stream-p)))
+  (unless (input-stream-p input-stream)
+    (error 'type-error
+          :datum input-stream
+          :expected-type '(satisfies input-stream-p)))
+  (funcall #'%make-echo-stream input-stream output-stream))
+
+(macrolet ((in-fun (name in-fun out-fun &rest args)

             `(defun ,name (stream ,@args)
                (or (pop (echo-stream-unread-stuff stream))
                    (let* ((in (echo-stream-input-stream stream))
                           (out (echo-stream-output-stream stream))
             `(defun ,name (stream ,@args)
                (or (pop (echo-stream-unread-stuff stream))
                    (let* ((in (echo-stream-input-stream stream))
                           (out (echo-stream-output-stream stream))

-                          (result (,fun in ,@args)))
-                     (if (lisp-stream-p out)
-                         (funcall (,out-slot out) out result)
-                         (,stream-method out result))
-                     result)))))
-  (in-fun echo-in read-char lisp-stream-out stream-write-char
-         eof-error-p eof-value)
-  (in-fun echo-bin read-byte lisp-stream-bout stream-write-byte
-         eof-error-p eof-value))
-
-(defun echo-misc (stream operation &optional arg1 arg2)
-  (let* ((in (two-way-stream-input-stream stream))
-        (out (two-way-stream-output-stream stream)))
-    (case operation
-      (:listen
-       (or (not (null (echo-stream-unread-stuff stream)))
-          (if (lisp-stream-p in)
-              (or (/= (the fixnum (lisp-stream-in-index in))
-                      +in-buffer-length+)
-                  (funcall (lisp-stream-misc in) in :listen))
-              (stream-misc-dispatch in :listen))))
-      (:unread (push arg1 (echo-stream-unread-stuff stream)))
-      (:element-type
-       (let ((in-type (stream-element-type in))
-            (out-type (stream-element-type out)))
-        (if (equal in-type out-type)
-            in-type `(and ,in-type ,out-type))))
-      (:close
-       (set-closed-flame stream))
-      (t
-       (or (if (lisp-stream-p in)
-              (funcall (lisp-stream-misc in) in operation arg1 arg2)
-              (stream-misc-dispatch in operation arg1 arg2))
-          (if (lisp-stream-p out)
-              (funcall (lisp-stream-misc out) out operation arg1 arg2)
-              (stream-misc-dispatch out operation arg1 arg2)))))))
-
-#!+sb-doc
-(setf (fdocumentation 'make-echo-stream 'function)
-  "Returns a bidirectional stream which gets its input from Input-Stream and
-   sends its output to Output-Stream. In addition, all input is echoed to
-   the output stream")
+                          (result (if eof-error-p
+                                      (,in-fun in ,@args)
+                                      (,in-fun in nil in))))
+                     (cond
+                       ((eql result in) eof-value)
+                       (t (,out-fun result out) result)))))))
+  (in-fun echo-in read-char write-char eof-error-p eof-value)
+  (in-fun echo-bin read-byte write-byte eof-error-p eof-value))
+
+(defun echo-n-bin (stream buffer start numbytes eof-error-p)
+  (let ((new-start start)
+       (read 0))
+    (loop
+     (let ((thing (pop (echo-stream-unread-stuff stream))))
+       (cond
+        (thing
+         (setf (aref buffer new-start) thing)
+         (incf new-start)
+         (incf read)
+         (when (= read numbytes)
+           (return-from echo-n-bin numbytes)))
+        (t (return nil)))))
+    (let ((bytes-read (read-n-bytes (echo-stream-input-stream stream) buffer
+                                   new-start (- numbytes read) nil)))
+      (cond
+       ((not eof-error-p)
+        (write-sequence buffer (echo-stream-output-stream stream)
+                        :start new-start :end (+ new-start bytes-read))
+        (+ bytes-read read))
+       ((> numbytes (+ read bytes-read))
+        (write-sequence buffer (echo-stream-output-stream stream)
+                        :start new-start :end (+ new-start bytes-read))
+        (error 'end-of-file :stream stream))
+       (t
+        (write-sequence buffer (echo-stream-output-stream stream)
+                        :start new-start :end (+ new-start bytes-read))
+        (aver (= numbytes (+ new-start bytes-read)))
+        numbytes)))))

 \f
 \f

-;;;; string input streams
+;;;; STRING-INPUT-STREAM stuff

 
 (defstruct (string-input-stream
 
 (defstruct (string-input-stream

-            (:include lisp-stream
+            (:include ansi-stream

                       (in #'string-inch)
                       (in #'string-inch)

-                      (bin #'string-binch)
-                      (n-bin #'string-stream-read-n-bytes)
+                      (bin #'ill-bin)
+                      (n-bin #'ill-bin)

                       (misc #'string-in-misc))
             (:constructor internal-make-string-input-stream
                           (string current end))
             (:copier nil))
                       (misc #'string-in-misc))
             (:constructor internal-make-string-input-stream
                           (string current end))
             (:copier nil))

-  (string nil :type simple-string)
-  (current nil :type index)
-  (end nil :type index))
+  (string (missing-arg) :type simple-string)
+  (current (missing-arg) :type index)
+  (end (missing-arg) :type index))

 
 (defun string-inch (stream eof-error-p eof-value)
 
 (defun string-inch (stream eof-error-p eof-value)

+  (declare (type string-input-stream stream))

   (let ((string (string-input-stream-string stream))
        (index (string-input-stream-current stream)))
   (let ((string (string-input-stream-string stream))
        (index (string-input-stream-current stream)))

-    (declare (simple-string string) (fixnum index))
-    (cond ((= index (the index (string-input-stream-end stream)))
+    (cond ((>= index (the index (string-input-stream-end stream)))

           (eof-or-lose stream eof-error-p eof-value))
          (t
           (setf (string-input-stream-current stream) (1+ index))
           (eof-or-lose stream eof-error-p eof-value))
          (t
           (setf (string-input-stream-current stream) (1+ index))

-          (aref string index)))))
+          (char string index)))))

 
 (defun string-binch (stream eof-error-p eof-value)
 
 (defun string-binch (stream eof-error-p eof-value)

+  (declare (type string-input-stream stream))

   (let ((string (string-input-stream-string stream))
        (index (string-input-stream-current stream)))
   (let ((string (string-input-stream-string stream))
        (index (string-input-stream-current stream)))

-    (declare (simple-string string)
-            (type index index))
-    (cond ((= index (the index (string-input-stream-end stream)))
+    (cond ((>= index (the index (string-input-stream-end stream)))

           (eof-or-lose stream eof-error-p eof-value))
          (t
           (setf (string-input-stream-current stream) (1+ index))
           (eof-or-lose stream eof-error-p eof-value))
          (t
           (setf (string-input-stream-current stream) (1+ index))

-          (char-code (aref string index))))))
+          (char-code (char string index))))))

 
 (defun string-stream-read-n-bytes (stream buffer start requested eof-error-p)
   (declare (type string-input-stream stream)
 
 (defun string-stream-read-n-bytes (stream buffer start requested eof-error-p)
   (declare (type string-input-stream stream)

@@ -1134,94 +1096,119 @@
         (index (string-input-stream-current stream))
         (available (- (string-input-stream-end stream) index))
         (copy (min available requested)))
         (index (string-input-stream-current stream))
         (available (- (string-input-stream-end stream) index))
         (copy (min available requested)))

-    (declare (simple-string string)
-            (type index index available copy))
+    (declare (type simple-string string))

     (when (plusp copy)
       (setf (string-input-stream-current stream)
            (truly-the index (+ index copy)))
     (when (plusp copy)
       (setf (string-input-stream-current stream)
            (truly-the index (+ index copy)))

+      ;; FIXME: why are we VECTOR-SAP'ing things here?  what's the point?
+      ;; and are there SB-UNICODE issues here as well?  --njf, 2005-03-24

       (sb!sys:without-gcing
       (sb!sys:without-gcing

-       (system-area-copy (vector-sap string)
-                        (* index sb!vm:byte-bits)
-                        (if (typep buffer 'system-area-pointer)
-                            buffer
-                            (vector-sap buffer))
-                        (* start sb!vm:byte-bits)
-                        (* copy sb!vm:byte-bits))))
+       (system-area-ub8-copy (vector-sap string)
+                             index
+                             (if (typep buffer 'system-area-pointer)
+                                 buffer
+                                 (vector-sap buffer))
+                             start
+                             copy)))

     (if (and (> requested copy) eof-error-p)
        (error 'end-of-file :stream stream)
        copy)))
 
 (defun string-in-misc (stream operation &optional arg1 arg2)
     (if (and (> requested copy) eof-error-p)
        (error 'end-of-file :stream stream)
        copy)))
 
 (defun string-in-misc (stream operation &optional arg1 arg2)

-  (declare (ignore arg2))
+  (declare (type string-input-stream stream)
+          (ignore arg2))

   (case operation
     (:file-position
      (if arg1
   (case operation
     (:file-position
      (if arg1

-        (setf (string-input-stream-current stream) arg1)
+        (setf (string-input-stream-current stream)
+              (case arg1
+                (:start 0)
+                (:end (string-input-stream-end stream))
+                ;; We allow moving position beyond EOF. Errors happen
+                ;; on read, not move -- or the user may extend the
+                ;; input string.
+                (t arg1)))

         (string-input-stream-current stream)))
         (string-input-stream-current stream)))

-    (:file-length (length (string-input-stream-string stream)))
+    ;; According to ANSI: "Should signal an error of type type-error
+    ;; if stream is not a stream associated with a file."
+    ;; This is checked by FILE-LENGTH, so no need to do it here either.
+    ;; (:file-length (length (string-input-stream-string stream)))

     (:unread (decf (string-input-stream-current stream)))
     (:unread (decf (string-input-stream-current stream)))

-    (:listen (or (/= (the fixnum (string-input-stream-current stream))
-                    (the fixnum (string-input-stream-end stream)))
+    (:close (set-closed-flame stream))
+    (:listen (or (/= (the index (string-input-stream-current stream))
+                    (the index (string-input-stream-end stream)))

                 :eof))
                 :eof))

-    (:element-type 'base-char)))
+    (:element-type (array-element-type (string-input-stream-string stream)))))

 
 

-(defun make-string-input-stream (string &optional
-                                       (start 0) (end (length string)))
+(defun make-string-input-stream (string &optional (start 0) end)

   #!+sb-doc
   #!+sb-doc

-  "Returns an input stream which will supply the characters of String between
-  Start and End in order."
+  "Return an input stream which will supply the characters of STRING between
+  START and END in order."

   (declare (type string string)
           (type index start)
           (type (or index null) end))
   (declare (type string string)
           (type index start)
           (type (or index null) end))

-
-  #!+high-security
-  (when (> end (length string))
-    (cerror "Continue with end changed from ~S to ~S"
-           "Write-string: end (~S) is larger then the length of the string (~S)"
-           end (1- (length string))))
-
-  (internal-make-string-input-stream (coerce string 'simple-string)
-                                    start end))
+  (let* ((string (coerce string '(simple-array character (*))))
+        (end (%check-vector-sequence-bounds string start end)))
+    (with-array-data ((string string) (start start) (end end))
+      (internal-make-string-input-stream
+       string ;; now simple
+       start
+       end))))

 \f
 \f

-;;;; string output streams
+;;;; STRING-OUTPUT-STREAM stuff

 
 (defstruct (string-output-stream
 
 (defstruct (string-output-stream

-           (:include lisp-stream
+           (:include ansi-stream

                      (out #'string-ouch)
                      (sout #'string-sout)
                      (misc #'string-out-misc))
                      (out #'string-ouch)
                      (sout #'string-sout)
                      (misc #'string-out-misc))

-           (:constructor make-string-output-stream ())
+           (:constructor make-string-output-stream 
+                         (&key (element-type 'character)
+                          &aux (string (make-string 40))))

            (:copier nil))
   ;; The string we throw stuff in.
            (:copier nil))
   ;; The string we throw stuff in.

-  (string (make-string 40) :type simple-string)
+  (string (missing-arg) :type (simple-array character (*)))

   ;; Index of the next location to use.
   ;; Index of the next location to use.

-  (index 0 :type fixnum))
+  (index 0 :type fixnum)
+  ;; Index cache for string-output-stream-last-index
+  (index-cache 0 :type fixnum)
+  ;; Requested element type
+  (element-type 'character))

 
 #!+sb-doc
 (setf (fdocumentation 'make-string-output-stream 'function)
 
 #!+sb-doc
 (setf (fdocumentation 'make-string-output-stream 'function)

-  "Returns an Output stream which will accumulate all output given it for
-   the benefit of the function Get-Output-Stream-String.")
+  "Return an output stream which will accumulate all output given it for
+   the benefit of the function GET-OUTPUT-STREAM-STRING.")
+
+(defun string-output-stream-last-index (stream)
+  (max (string-output-stream-index stream)
+       (string-output-stream-index-cache stream)))

 
 (defun string-ouch (stream character)
   (let ((current (string-output-stream-index stream))
        (workspace (string-output-stream-string stream)))
 
 (defun string-ouch (stream character)
   (let ((current (string-output-stream-index stream))
        (workspace (string-output-stream-string stream)))

-    (declare (simple-string workspace) (fixnum current))
+    (declare (type (simple-array character (*)) workspace)
+            (type fixnum current))

     (if (= current (the fixnum (length workspace)))
        (let ((new-workspace (make-string (* current 2))))
          (replace new-workspace workspace)
     (if (= current (the fixnum (length workspace)))
        (let ((new-workspace (make-string (* current 2))))
          (replace new-workspace workspace)

-         (setf (aref new-workspace current) character)
-         (setf (string-output-stream-string stream) new-workspace))
+         (setf (aref new-workspace current) character
+               (string-output-stream-string stream) new-workspace))

        (setf (aref workspace current) character))
     (setf (string-output-stream-index stream) (1+ current))))
 
 (defun string-sout (stream string start end)
        (setf (aref workspace current) character))
     (setf (string-output-stream-index stream) (1+ current))))
 
 (defun string-sout (stream string start end)

-  (declare (simple-string string) (fixnum start end))
-  (let* ((current (string-output-stream-index stream))
+  (declare (type simple-string string)
+          (type fixnum start end))
+  (let* ((string (if (typep string '(simple-array character (*)))
+                    string
+                    (coerce string '(simple-array character (*)))))
+        (current (string-output-stream-index stream))

         (length (- end start))
         (dst-end (+ length current))
         (workspace (string-output-stream-string stream)))
         (length (- end start))
         (dst-end (+ length current))
         (workspace (string-output-stream-string stream)))

-    (declare (simple-string workspace)
-            (fixnum current length dst-end))
+    (declare (type (simple-array character (*)) workspace string)
+            (type fixnum current length dst-end))

     (if (> dst-end (the fixnum (length workspace)))
        (let ((new-workspace (make-string (+ (* current 2) length))))
          (replace new-workspace workspace :end2 current)
     (if (> dst-end (the fixnum (length workspace)))
        (let ((new-workspace (make-string (+ (* current 2) length))))
          (replace new-workspace workspace :end2 current)

@@ -1238,36 +1225,75 @@
   (declare (ignore arg2))
   (case operation
     (:file-position
   (declare (ignore arg2))
   (case operation
     (:file-position

-     (if (null arg1)
+     (if arg1
+        (let ((end (string-output-stream-last-index stream)))
+          (setf (string-output-stream-index-cache stream) end
+                (string-output-stream-index stream)
+                (case arg1
+                  (:start 0)
+                  (:end end)
+                  (t
+                   ;; We allow moving beyond the end of stream,
+                   ;; implicitly extending the output stream.
+                   (let ((buffer (string-output-stream-string stream)))
+                     (when (> arg1 (length buffer))
+                       (setf (string-output-stream-string stream)
+                             (make-string
+                              arg1 :element-type (array-element-type buffer))
+                             (subseq (string-output-stream-string stream)
+                                     0 end)
+                             (subseq buffer 0 end))))
+                     arg1))))

         (string-output-stream-index stream)))
         (string-output-stream-index stream)))

+    (:close (set-closed-flame stream))

     (:charpos
      (do ((index (1- (the fixnum (string-output-stream-index stream)))
                 (1- index))
          (count 0 (1+ count))
          (string (string-output-stream-string stream)))
         ((< index 0) count)
     (:charpos
      (do ((index (1- (the fixnum (string-output-stream-index stream)))
                 (1- index))
          (count 0 (1+ count))
          (string (string-output-stream-string stream)))
         ((< index 0) count)

-       (declare (simple-string string)
-               (fixnum index count))
+       (declare (type (simple-array character (*)) string)
+               (type fixnum index count))

        (if (char= (schar string index) #\newline)
           (return count))))
        (if (char= (schar string index) #\newline)
           (return count))))

-    (:element-type 'base-char)))
+    (:element-type (array-element-type (string-output-stream-string stream)))))

 
 ;;; Return a string of all the characters sent to a stream made by
 ;;; MAKE-STRING-OUTPUT-STREAM since the last call to this function.
 (defun get-output-stream-string (stream)
   (declare (type string-output-stream stream))
 
 ;;; Return a string of all the characters sent to a stream made by
 ;;; MAKE-STRING-OUTPUT-STREAM since the last call to this function.
 (defun get-output-stream-string (stream)
   (declare (type string-output-stream stream))

-  (let* ((length (string-output-stream-index stream))
-        (result (make-string length)))
-    (replace result (string-output-stream-string stream))
-    (setf (string-output-stream-index stream) 0)
+  (let* ((length (string-output-stream-last-index stream))
+        (element-type (string-output-stream-element-type stream))
+        (result 
+         (case element-type
+           ;; overwhelmingly common case: can be inlined
+           ((character) (make-string length))
+           ;; slightly less common cases: inline it anyway
+           ((base-char standard-char)
+            (make-string length :element-type 'base-char))
+           (t (make-string length :element-type element-type)))))
+    ;; For the benefit of the REPLACE transform, let's do this, so
+    ;; that the common case isn't ludicrously expensive.
+    (etypecase result 
+      ((simple-array character (*)) 
+       (replace result (string-output-stream-string stream)))
+      (simple-base-string
+       (replace result (string-output-stream-string stream)))
+      ((simple-array nil (*))
+       (replace result (string-output-stream-string stream))))
+    (setf (string-output-stream-index stream) 0
+         (string-output-stream-index-cache stream) 0)

     result))
 
 ;;; Dump the characters buffer up in IN-STREAM to OUT-STREAM as
 ;;; GET-OUTPUT-STREAM-STRING would return them.
 (defun dump-output-stream-string (in-stream out-stream)
     result))
 
 ;;; Dump the characters buffer up in IN-STREAM to OUT-STREAM as
 ;;; GET-OUTPUT-STREAM-STRING would return them.
 (defun dump-output-stream-string (in-stream out-stream)

-  (write-string* (string-output-stream-string in-stream) out-stream
-                0 (string-output-stream-index in-stream))
-  (setf (string-output-stream-index in-stream) 0))
+  (%write-string (string-output-stream-string in-stream)
+                out-stream
+                0
+                (string-output-stream-last-index in-stream))
+  (setf (string-output-stream-index in-stream) 0
+       (string-output-stream-index-cache in-stream) 0))

 \f
 ;;;; fill-pointer streams
 
 \f
 ;;;; fill-pointer streams
 

@@ -1275,15 +1301,21 @@
 ;;; the CLM, but they are required for the implementation of
 ;;; WITH-OUTPUT-TO-STRING.
 
 ;;; the CLM, but they are required for the implementation of
 ;;; WITH-OUTPUT-TO-STRING.
 

+;;; FIXME: need to support (VECTOR BASE-CHAR) and (VECTOR NIL),
+;;; ideally without destroying all hope of efficiency.
+(deftype string-with-fill-pointer ()
+  '(and (vector character)
+       (satisfies array-has-fill-pointer-p)))
+

 (defstruct (fill-pointer-output-stream
 (defstruct (fill-pointer-output-stream

-           (:include lisp-stream
+           (:include ansi-stream

                      (out #'fill-pointer-ouch)
                      (sout #'fill-pointer-sout)
                      (misc #'fill-pointer-misc))
            (:constructor make-fill-pointer-output-stream (string))
            (:copier nil))
                      (out #'fill-pointer-ouch)
                      (sout #'fill-pointer-sout)
                      (misc #'fill-pointer-misc))
            (:constructor make-fill-pointer-output-stream (string))
            (:copier nil))

-  ;; the string we throw stuff in
-  string)
+  ;; a string with a fill pointer where we stuff the stuff we write
+  (string (missing-arg) :type string-with-fill-pointer :read-only t))

 
 (defun fill-pointer-ouch (stream character)
   (let* ((buffer (fill-pointer-output-stream-string stream))
 
 (defun fill-pointer-ouch (stream character)
   (let* ((buffer (fill-pointer-output-stream-string stream))

@@ -1291,17 +1323,17 @@
         (current+1 (1+ current)))
     (declare (fixnum current))
     (with-array-data ((workspace buffer) (start) (end))
         (current+1 (1+ current)))
     (declare (fixnum current))
     (with-array-data ((workspace buffer) (start) (end))

-      (declare (simple-string workspace))
+      (declare (type (simple-array character (*)) workspace))

       (let ((offset-current (+ start current)))
        (declare (fixnum offset-current))
        (if (= offset-current end)
            (let* ((new-length (1+ (* current 2)))
                   (new-workspace (make-string new-length)))
       (let ((offset-current (+ start current)))
        (declare (fixnum offset-current))
        (if (= offset-current end)
            (let* ((new-length (1+ (* current 2)))
                   (new-workspace (make-string new-length)))

-             (declare (simple-string new-workspace))
-             (%byte-blt workspace start
-                        new-workspace 0 current)
-             (setf workspace new-workspace)
-             (setf offset-current current)
+             (declare (type (simple-array character (*)) new-workspace))
+              (replace new-workspace workspace
+                       :start2 start :end2 offset-current)
+             (setf workspace new-workspace
+                   offset-current current)

              (set-array-header buffer workspace new-length
                                current+1 0 new-length nil))
            (setf (fill-pointer buffer) current+1))
              (set-array-header buffer workspace new-length
                                current+1 0 new-length nil))
            (setf (fill-pointer buffer) current+1))

@@ -1310,40 +1342,57 @@
 
 (defun fill-pointer-sout (stream string start end)
   (declare (simple-string string) (fixnum start end))
 
 (defun fill-pointer-sout (stream string start end)
   (declare (simple-string string) (fixnum start end))

-  (let* ((buffer (fill-pointer-output-stream-string stream))
+  (let* ((string (if (typep string '(simple-array character (*)))
+                    string
+                    (coerce string '(simple-array character (*)))))
+        (buffer (fill-pointer-output-stream-string stream))

         (current (fill-pointer buffer))
         (string-len (- end start))
         (dst-end (+ string-len current)))
     (declare (fixnum current dst-end string-len))
     (with-array-data ((workspace buffer) (dst-start) (dst-length))
         (current (fill-pointer buffer))
         (string-len (- end start))
         (dst-end (+ string-len current)))
     (declare (fixnum current dst-end string-len))
     (with-array-data ((workspace buffer) (dst-start) (dst-length))

-      (declare (simple-string workspace))
+      (declare (type (simple-array character (*)) workspace))

       (let ((offset-dst-end (+ dst-start dst-end))
            (offset-current (+ dst-start current)))
        (declare (fixnum offset-dst-end offset-current))
        (if (> offset-dst-end dst-length)
            (let* ((new-length (+ (the fixnum (* current 2)) string-len))
                   (new-workspace (make-string new-length)))
       (let ((offset-dst-end (+ dst-start dst-end))
            (offset-current (+ dst-start current)))
        (declare (fixnum offset-dst-end offset-current))
        (if (> offset-dst-end dst-length)
            (let* ((new-length (+ (the fixnum (* current 2)) string-len))
                   (new-workspace (make-string new-length)))

-             (declare (simple-string new-workspace))
-             (%byte-blt workspace dst-start
-                        new-workspace 0 current)
-             (setf workspace new-workspace)
-             (setf offset-current current)
-             (setf offset-dst-end dst-end)
-             (set-array-header buffer
-                               workspace
-                               new-length
-                               dst-end
-                               0
-                               new-length
-                               nil))
+             (declare (type (simple-array character (*)) new-workspace))
+              (replace new-workspace workspace
+                       :start2 dst-start :end2 offset-current)
+             (setf workspace new-workspace
+                    offset-current current
+                    offset-dst-end dst-end)
+             (set-array-header buffer workspace new-length
+                               dst-end 0 new-length nil))

            (setf (fill-pointer buffer) dst-end))
            (setf (fill-pointer buffer) dst-end))

-       (%byte-blt string start
-                  workspace offset-current offset-dst-end)))
+       (replace workspace string
+                 :start1 offset-current :start2 start :end2 end)))

     dst-end))
 
 (defun fill-pointer-misc (stream operation &optional arg1 arg2)
     dst-end))
 
 (defun fill-pointer-misc (stream operation &optional arg1 arg2)

-  (declare (ignore arg1 arg2))
+  (declare (ignore arg2))

   (case operation
   (case operation

+    (:file-position
+     (let ((buffer (fill-pointer-output-stream-string stream)))
+       (if arg1
+          (setf (fill-pointer buffer)
+                (case arg1
+                  (:start 0)
+                  ;; Fill-pointer is always at fill-pointer we will
+                  ;; make :END move to the end of the actual string.
+                  (:end (array-total-size buffer))
+                  ;; We allow moving beyond the end of string if the
+                  ;; string is adjustable.
+                  (t (when (>= arg1 (array-total-size buffer))
+                       (if (adjustable-array-p buffer)
+                           (adjust-array buffer arg1)
+                           (error "Cannot move FILE-POSITION beyond the end ~
+                                    of WITH-OUTPUT-TO-STRING stream ~
+                                    constructed with non-adjustable string.")))
+                     arg1)))
+          (fill-pointer buffer))))

     (:charpos
      (let* ((buffer (fill-pointer-output-stream-string stream))
            (current (fill-pointer buffer)))
     (:charpos
      (let* ((buffer (fill-pointer-output-stream-string stream))
            (current (fill-pointer buffer)))

@@ -1354,11 +1403,12 @@
           (if found
               (- end (the fixnum found))
               current)))))
           (if found
               (- end (the fixnum found))
               current)))))

-     (:element-type 'base-char)))
+     (:element-type (array-element-type
+                    (fill-pointer-output-stream-string stream)))))

 \f
 ;;;; indenting streams
 
 \f
 ;;;; indenting streams
 

-(defstruct (indenting-stream (:include lisp-stream
+(defstruct (indenting-stream (:include ansi-stream

                                       (out #'indenting-out)
                                       (sout #'indenting-sout)
                                       (misc #'indenting-misc))
                                       (out #'indenting-out)
                                       (sout #'indenting-sout)
                                       (misc #'indenting-misc))

@@ -1371,7 +1421,7 @@
 
 #!+sb-doc
 (setf (fdocumentation 'make-indenting-stream 'function)
 
 #!+sb-doc
 (setf (fdocumentation 'make-indenting-stream 'function)

- "Returns an output stream which indents its output by some amount.")
+ "Return an output stream which indents its output by some amount.")

 
 ;;; INDENTING-INDENT writes the correct number of spaces needed to indent
 ;;; output on the given STREAM based on the specified SUB-STREAM.
 
 ;;; INDENTING-INDENT writes the correct number of spaces needed to indent
 ;;; output on the given STREAM based on the specified SUB-STREAM.

@@ -1380,9 +1430,11 @@
   `(do ((i 0 (+ i 60))
        (indentation (indenting-stream-indentation ,stream)))
        ((>= i indentation))
   `(do ((i 0 (+ i 60))
        (indentation (indenting-stream-indentation ,stream)))
        ((>= i indentation))

-     (write-string*
-      "                                                            "
-      ,sub-stream 0 (min 60 (- indentation i)))))
+     (%write-string
+      #.(make-string 60 :initial-element #\Space)
+      ,sub-stream
+      0
+      (min 60 (- indentation i)))))

 
 ;;; INDENTING-OUT writes a character to an indenting stream.
 (defun indenting-out (stream char)
 
 ;;; INDENTING-OUT writes a character to an indenting stream.
 (defun indenting-out (stream char)

@@ -1399,11 +1451,11 @@
       ((= i end))
     (let ((newline (position #\newline string :start i :end end)))
       (cond (newline
       ((= i end))
     (let ((newline (position #\newline string :start i :end end)))
       (cond (newline

-            (write-string* string sub-stream i (1+ newline))
+            (%write-string string sub-stream i (1+ newline))

             (indenting-indent stream sub-stream)
             (setq i (+ newline 1)))
            (t
             (indenting-indent stream sub-stream)
             (setq i (+ newline 1)))
            (t

-            (write-string* string sub-stream i end)
+            (%write-string string sub-stream i end)

             (setq i end))))))
 
 ;;; INDENTING-MISC just treats just the :LINE-LENGTH message
             (setq i end))))))
 
 ;;; INDENTING-MISC just treats just the :LINE-LENGTH message

@@ -1411,8 +1463,8 @@
 ;;; the base stream minus the stream's indentation.
 (defun indenting-misc (stream operation &optional arg1 arg2)
   (let ((sub-stream (indenting-stream-stream stream)))
 ;;; the base stream minus the stream's indentation.
 (defun indenting-misc (stream operation &optional arg1 arg2)
   (let ((sub-stream (indenting-stream-stream stream)))

-    (if (lisp-stream-p sub-stream)
-       (let ((method (lisp-stream-misc sub-stream)))
+    (if (ansi-stream-p sub-stream)
+       (let ((method (ansi-stream-misc sub-stream)))

          (case operation
            (:line-length
             (let ((line-length (funcall method sub-stream operation)))
          (case operation
            (:line-length
             (let ((line-length (funcall method sub-stream operation)))

@@ -1442,22 +1494,22 @@
 ;;;; case frobbing streams, used by FORMAT ~(...~)
 
 (defstruct (case-frob-stream
 ;;;; case frobbing streams, used by FORMAT ~(...~)
 
 (defstruct (case-frob-stream

-           (:include lisp-stream
-                     (:misc #'case-frob-misc))
+           (:include ansi-stream
+                     (misc #'case-frob-misc))

            (:constructor %make-case-frob-stream (target out sout))
            (:copier nil))
            (:constructor %make-case-frob-stream (target out sout))
            (:copier nil))

-  (target (required-argument) :type stream))
+  (target (missing-arg) :type stream))

 
 (defun make-case-frob-stream (target kind)
   #!+sb-doc
 
 (defun make-case-frob-stream (target kind)
   #!+sb-doc

-  "Returns a stream that sends all output to the stream TARGET, but modifies
+  "Return a stream that sends all output to the stream TARGET, but modifies

    the case of letters, depending on KIND, which should be one of:
    the case of letters, depending on KIND, which should be one of:

-     :upcase - convert to upper case.
-     :downcase - convert to lower case.
-     :capitalize - convert the first letter of words to upper case and the
-       rest of the word to lower case.
-     :capitalize-first - convert the first letter of the first word to upper
-       case and everything else to lower case."
+     :UPCASE - convert to upper case.
+     :DOWNCASE - convert to lower case.
+     :CAPITALIZE - convert the first letter of words to upper case and the
+        rest of the word to lower case.
+     :CAPITALIZE-FIRST - convert the first letter of the first word to upper
+        case and everything else to lower case."

   (declare (type stream target)
           (type (member :upcase :downcase :capitalize :capitalize-first)
                 kind)
   (declare (type stream target)
           (type (member :upcase :downcase :capitalize :capitalize-first)
                 kind)

@@ -1486,25 +1538,26 @@
 (defun case-frob-misc (stream op &optional arg1 arg2)
   (declare (type case-frob-stream stream))
   (case op
 (defun case-frob-misc (stream op &optional arg1 arg2)
   (declare (type case-frob-stream stream))
   (case op

-    (:close)
+    (:close
+     (set-closed-flame stream))

     (t
      (let ((target (case-frob-stream-target stream)))
     (t
      (let ((target (case-frob-stream-target stream)))

-       (if (lisp-stream-p target)
-          (funcall (lisp-stream-misc target) target op arg1 arg2)
+       (if (ansi-stream-p target)
+          (funcall (ansi-stream-misc target) target op arg1 arg2)

           (stream-misc-dispatch target op arg1 arg2))))))
 
 (defun case-frob-upcase-out (stream char)
   (declare (type case-frob-stream stream)
           (stream-misc-dispatch target op arg1 arg2))))))
 
 (defun case-frob-upcase-out (stream char)
   (declare (type case-frob-stream stream)

-          (type base-char char))
+          (type character char))

   (let ((target (case-frob-stream-target stream))
        (char (char-upcase char)))
   (let ((target (case-frob-stream-target stream))
        (char (char-upcase char)))

-    (if (lisp-stream-p target)
-       (funcall (lisp-stream-out target) target char)
+    (if (ansi-stream-p target)
+       (funcall (ansi-stream-out target) target char)

        (stream-write-char target char))))
 
 (defun case-frob-upcase-sout (stream str start end)
   (declare (type case-frob-stream stream)
        (stream-write-char target char))))
 
 (defun case-frob-upcase-sout (stream str start end)
   (declare (type case-frob-stream stream)

-          (type simple-base-string str)
+          (type simple-string str)

           (type index start)
           (type (or index null) end))
   (let* ((target (case-frob-stream-target stream))
           (type index start)
           (type (or index null) end))
   (let* ((target (case-frob-stream-target stream))

@@ -1514,22 +1567,22 @@
                     (string-upcase str)
                     (nstring-upcase (subseq str start end))))
         (string-len (- end start)))
                     (string-upcase str)
                     (nstring-upcase (subseq str start end))))
         (string-len (- end start)))

-    (if (lisp-stream-p target)
-       (funcall (lisp-stream-sout target) target string 0 string-len)
+    (if (ansi-stream-p target)
+       (funcall (ansi-stream-sout target) target string 0 string-len)

        (stream-write-string target string 0 string-len))))
 
 (defun case-frob-downcase-out (stream char)
   (declare (type case-frob-stream stream)
        (stream-write-string target string 0 string-len))))
 
 (defun case-frob-downcase-out (stream char)
   (declare (type case-frob-stream stream)

-          (type base-char char))
+          (type character char))

   (let ((target (case-frob-stream-target stream))
        (char (char-downcase char)))
   (let ((target (case-frob-stream-target stream))
        (char (char-downcase char)))

-    (if (lisp-stream-p target)
-       (funcall (lisp-stream-out target) target char)
+    (if (ansi-stream-p target)
+       (funcall (ansi-stream-out target) target char)

        (stream-write-char target char))))
 
 (defun case-frob-downcase-sout (stream str start end)
   (declare (type case-frob-stream stream)
        (stream-write-char target char))))
 
 (defun case-frob-downcase-sout (stream str start end)
   (declare (type case-frob-stream stream)

-          (type simple-base-string str)
+          (type simple-string str)

           (type index start)
           (type (or index null) end))
   (let* ((target (case-frob-stream-target stream))
           (type index start)
           (type (or index null) end))
   (let* ((target (case-frob-stream-target stream))

@@ -1539,30 +1592,30 @@
                     (string-downcase str)
                     (nstring-downcase (subseq str start end))))
         (string-len (- end start)))
                     (string-downcase str)
                     (nstring-downcase (subseq str start end))))
         (string-len (- end start)))

-    (if (lisp-stream-p target)
-       (funcall (lisp-stream-sout target) target string 0 string-len)
+    (if (ansi-stream-p target)
+       (funcall (ansi-stream-sout target) target string 0 string-len)

        (stream-write-string target string 0 string-len))))
 
 (defun case-frob-capitalize-out (stream char)
   (declare (type case-frob-stream stream)
        (stream-write-string target string 0 string-len))))
 
 (defun case-frob-capitalize-out (stream char)
   (declare (type case-frob-stream stream)

-          (type base-char char))
+          (type character char))

   (let ((target (case-frob-stream-target stream)))
     (cond ((alphanumericp char)
           (let ((char (char-upcase char)))
   (let ((target (case-frob-stream-target stream)))
     (cond ((alphanumericp char)
           (let ((char (char-upcase char)))

-            (if (lisp-stream-p target)
-                (funcall (lisp-stream-out target) target char)
+            (if (ansi-stream-p target)
+                (funcall (ansi-stream-out target) target char)

                 (stream-write-char target char)))
           (setf (case-frob-stream-out stream) #'case-frob-capitalize-aux-out)
           (setf (case-frob-stream-sout stream)
                 #'case-frob-capitalize-aux-sout))
          (t
                 (stream-write-char target char)))
           (setf (case-frob-stream-out stream) #'case-frob-capitalize-aux-out)
           (setf (case-frob-stream-sout stream)
                 #'case-frob-capitalize-aux-sout))
          (t

-          (if (lisp-stream-p target)
-              (funcall (lisp-stream-out target) target char)
+          (if (ansi-stream-p target)
+              (funcall (ansi-stream-out target) target char)

               (stream-write-char target char))))))
 
 (defun case-frob-capitalize-sout (stream str start end)
   (declare (type case-frob-stream stream)
               (stream-write-char target char))))))
 
 (defun case-frob-capitalize-sout (stream str start end)
   (declare (type case-frob-stream stream)

-          (type simple-base-string str)
+          (type simple-string str)

           (type index start)
           (type (or index null) end))
   (let* ((target (case-frob-stream-target stream))
           (type index start)
           (type (or index null) end))
   (let* ((target (case-frob-stream-target stream))

@@ -1583,22 +1636,22 @@
            #'case-frob-capitalize-aux-out)
       (setf (case-frob-stream-sout stream)
            #'case-frob-capitalize-aux-sout))
            #'case-frob-capitalize-aux-out)
       (setf (case-frob-stream-sout stream)
            #'case-frob-capitalize-aux-sout))

-    (if (lisp-stream-p target)
-       (funcall (lisp-stream-sout target) target str 0 len)
+    (if (ansi-stream-p target)
+       (funcall (ansi-stream-sout target) target str 0 len)

        (stream-write-string target str 0 len))))
 
 (defun case-frob-capitalize-aux-out (stream char)
   (declare (type case-frob-stream stream)
        (stream-write-string target str 0 len))))
 
 (defun case-frob-capitalize-aux-out (stream char)
   (declare (type case-frob-stream stream)

-          (type base-char char))
+          (type character char))

   (let ((target (case-frob-stream-target stream)))
     (cond ((alphanumericp char)
           (let ((char (char-downcase char)))
   (let ((target (case-frob-stream-target stream)))
     (cond ((alphanumericp char)
           (let ((char (char-downcase char)))

-            (if (lisp-stream-p target)
-                (funcall (lisp-stream-out target) target char)
+            (if (ansi-stream-p target)
+                (funcall (ansi-stream-out target) target char)

                 (stream-write-char target char))))
          (t
                 (stream-write-char target char))))
          (t

-          (if (lisp-stream-p target)
-              (funcall (lisp-stream-out target) target char)
+          (if (ansi-stream-p target)
+              (funcall (ansi-stream-out target) target char)

               (stream-write-char target char))
           (setf (case-frob-stream-out stream)
                 #'case-frob-capitalize-out)
               (stream-write-char target char))
           (setf (case-frob-stream-out stream)
                 #'case-frob-capitalize-out)

@@ -1607,7 +1660,7 @@
 
 (defun case-frob-capitalize-aux-sout (stream str start end)
   (declare (type case-frob-stream stream)
 
 (defun case-frob-capitalize-aux-sout (stream str start end)
   (declare (type case-frob-stream stream)

-          (type simple-base-string str)
+          (type simple-string str)

           (type index start)
           (type (or index null) end))
   (let* ((target (case-frob-stream-target stream))
           (type index start)
           (type (or index null) end))
   (let* ((target (case-frob-stream-target stream))

@@ -1628,31 +1681,31 @@
            #'case-frob-capitalize-out)
       (setf (case-frob-stream-sout stream)
            #'case-frob-capitalize-sout))
            #'case-frob-capitalize-out)
       (setf (case-frob-stream-sout stream)
            #'case-frob-capitalize-sout))

-    (if (lisp-stream-p target)
-       (funcall (lisp-stream-sout target) target str 0 len)
+    (if (ansi-stream-p target)
+       (funcall (ansi-stream-sout target) target str 0 len)

        (stream-write-string target str 0 len))))
 
 (defun case-frob-capitalize-first-out (stream char)
   (declare (type case-frob-stream stream)
        (stream-write-string target str 0 len))))
 
 (defun case-frob-capitalize-first-out (stream char)
   (declare (type case-frob-stream stream)

-          (type base-char char))
+          (type character char))

   (let ((target (case-frob-stream-target stream)))
     (cond ((alphanumericp char)
           (let ((char (char-upcase char)))
   (let ((target (case-frob-stream-target stream)))
     (cond ((alphanumericp char)
           (let ((char (char-upcase char)))

-            (if (lisp-stream-p target)
-                (funcall (lisp-stream-out target) target char)
+            (if (ansi-stream-p target)
+                (funcall (ansi-stream-out target) target char)

                 (stream-write-char target char)))
           (setf (case-frob-stream-out stream)
                 #'case-frob-downcase-out)
           (setf (case-frob-stream-sout stream)
                 #'case-frob-downcase-sout))
          (t
                 (stream-write-char target char)))
           (setf (case-frob-stream-out stream)
                 #'case-frob-downcase-out)
           (setf (case-frob-stream-sout stream)
                 #'case-frob-downcase-sout))
          (t

-          (if (lisp-stream-p target)
-              (funcall (lisp-stream-out target) target char)
+          (if (ansi-stream-p target)
+              (funcall (ansi-stream-out target) target char)

               (stream-write-char target char))))))
 
 (defun case-frob-capitalize-first-sout (stream str start end)
   (declare (type case-frob-stream stream)
               (stream-write-char target char))))))
 
 (defun case-frob-capitalize-first-sout (stream str start end)
   (declare (type case-frob-stream stream)

-          (type simple-base-string str)
+          (type simple-string str)

           (type index start)
           (type (or index null) end))
   (let* ((target (case-frob-stream-target stream))
           (type index start)
           (type (or index null) end))
   (let* ((target (case-frob-stream-target stream))

@@ -1670,42 +1723,13 @@
          (setf (case-frob-stream-sout stream)
                #'case-frob-downcase-sout)
          (return))))
          (setf (case-frob-stream-sout stream)
                #'case-frob-downcase-sout)
          (return))))

-    (if (lisp-stream-p target)
-       (funcall (lisp-stream-sout target) target str 0 len)
+    (if (ansi-stream-p target)
+       (funcall (ansi-stream-sout target) target str 0 len)

        (stream-write-string target str 0 len))))
 \f
        (stream-write-string target str 0 len))))
 \f

-;;;; stream commands
+;;;; READ-SEQUENCE

 
 

-(defstruct (stream-command (:constructor make-stream-command
-                                        (name &optional args))
-                          (:copier nil))
-  (name nil :type symbol)
-  (args nil :type list))
-(def!method print-object ((obj stream-command) str)
-  (print-unreadable-object (obj str :type t :identity t)
-    (prin1 (stream-command-name obj) str)))
-
-;;; Take a stream and wait for text or a command to appear on it. If
-;;; text appears before a command, return NIL, otherwise return a
-;;; command.
-;;;
-;;; We can't simply call the stream's misc method because NIL is an
-;;; ambiguous return value: does it mean text arrived, or does it mean
-;;; the stream's misc method had no :GET-COMMAND implementation? We
-;;; can't return NIL until there is text input. We don't need to loop
-;;; because any stream implementing :GET-COMMAND would wait until it
-;;; had some input. If the LISTEN fails, then we have some stream we
-;;; must wait on.
-(defun get-stream-command (stream)
-  (let ((cmdp (funcall (lisp-stream-misc stream) stream :get-command)))
-    (cond (cmdp)
-         ((listen stream)
-          nil)
-         (t
-          ;; This waits for input and returns NIL when it arrives.
-          (unread-char (read-char stream) stream)))))
-\f
-(defun read-sequence (seq stream &key (start 0) (end nil))
+(defun read-sequence (seq stream &key (start 0) end)

   #!+sb-doc
   "Destructively modify SEQ by reading elements from STREAM.
   That part of SEQ bounded by START and END is destructively modified by
   #!+sb-doc
   "Destructively modify SEQ by reading elements from STREAM.
   That part of SEQ bounded by START and END is destructively modified by

@@ -1718,50 +1742,59 @@
           (type index start)
           (type sequence-end end)
           (values index))
           (type index start)
           (type sequence-end end)
           (values index))

-  (let ((end (or end (length seq))))
+  (if (ansi-stream-p stream)
+      (ansi-stream-read-sequence seq stream start end)
+      ;; must be Gray streams FUNDAMENTAL-STREAM
+      (stream-read-sequence stream seq start end)))
+
+(defun ansi-stream-read-sequence (seq stream start %end)
+  (declare (type sequence seq)
+          (type ansi-stream stream)
+          (type index start)
+          (type sequence-end %end)
+          (values index))
+  (let ((end (or %end (length seq))))

     (declare (type index end))
     (etypecase seq
       (list
        (let ((read-function
              (if (subtypep (stream-element-type stream) 'character)
     (declare (type index end))
     (etypecase seq
       (list
        (let ((read-function
              (if (subtypep (stream-element-type stream) 'character)

-                 #'read-char
-                 #'read-byte)))
+                 #'ansi-stream-read-char
+                 #'ansi-stream-read-byte)))

         (do ((rem (nthcdr start seq) (rest rem))
              (i start (1+ i)))
             ((or (endp rem) (>= i end)) i)
           (declare (type list rem)
                    (type index i))
         (do ((rem (nthcdr start seq) (rest rem))
              (i start (1+ i)))
             ((or (endp rem) (>= i end)) i)
           (declare (type list rem)
                    (type index i))

-          (let ((el (funcall read-function stream nil :eof)))
+          (let ((el (funcall read-function stream nil :eof nil)))

             (when (eq el :eof)
               (return i))
             (setf (first rem) el)))))
       (vector
        (with-array-data ((data seq) (offset-start start) (offset-end end))
             (when (eq el :eof)
               (return i))
             (setf (first rem) el)))))
       (vector
        (with-array-data ((data seq) (offset-start start) (offset-end end))

-        (typecase data
+         (typecase data

           ((or (simple-array (unsigned-byte 8) (*))
           ((or (simple-array (unsigned-byte 8) (*))

-               (simple-array (signed-byte 8) (*))
-               simple-string)
+               (simple-array (signed-byte 8) (*)))

            (let* ((numbytes (- end start))
            (let* ((numbytes (- end start))

-                  (bytes-read (sb!sys:read-n-bytes stream
-                                                   data
-                                                   offset-start
-                                                   numbytes
-                                                   nil)))
+                  (bytes-read (read-n-bytes stream data offset-start
+                                            numbytes nil)))

              (if (< bytes-read numbytes)
                  (+ start bytes-read)
                  end)))
           (t
            (let ((read-function
                   (if (subtypep (stream-element-type stream) 'character)
              (if (< bytes-read numbytes)
                  (+ start bytes-read)
                  end)))
           (t
            (let ((read-function
                   (if (subtypep (stream-element-type stream) 'character)

-                      #'read-char
-                      #'read-byte)))
+                      #'ansi-stream-read-char
+                      #'ansi-stream-read-byte)))

              (do ((i offset-start (1+ i)))
                  ((>= i offset-end) end)
                (declare (type index i))
              (do ((i offset-start (1+ i)))
                  ((>= i offset-end) end)
                (declare (type index i))

-               (let ((el (funcall read-function stream nil :eof)))
+               (let ((el (funcall read-function stream nil :eof nil)))

                  (when (eq el :eof)
                    (return (+ start (- i offset-start))))
                  (setf (aref data i) el)))))))))))
                  (when (eq el :eof)
                    (return (+ start (- i offset-start))))
                  (setf (aref data i) el)))))))))))

+\f
+;;;; WRITE-SEQUENCE

 
 (defun write-sequence (seq stream &key (start 0) (end nil))
   #!+sb-doc
 
 (defun write-sequence (seq stream &key (start 0) (end nil))
   #!+sb-doc

@@ -1771,32 +1804,53 @@
           (type index start)
           (type sequence-end end)
           (values sequence))
           (type index start)
           (type sequence-end end)
           (values sequence))

-  (let ((end (or end (length seq))))
-    (declare (type index start end))
+  (if (ansi-stream-p stream)
+      (ansi-stream-write-sequence seq stream start end)
+      ;; must be Gray-streams FUNDAMENTAL-STREAM
+      (stream-write-sequence stream seq start end)))
+
+(defun ansi-stream-write-sequence (seq stream start %end)
+  (declare (type sequence seq)
+          (type ansi-stream stream)
+          (type index start)
+          (type sequence-end %end)
+          (values sequence))
+  (let ((end (or %end (length seq))))
+    (declare (type index end))

     (etypecase seq
       (list
        (let ((write-function
              (if (subtypep (stream-element-type stream) 'character)
     (etypecase seq
       (list
        (let ((write-function
              (if (subtypep (stream-element-type stream) 'character)

-                 #'write-char
-                 #'write-byte)))
+                 (ansi-stream-out stream)
+                 (ansi-stream-bout stream))))

         (do ((rem (nthcdr start seq) (rest rem))
              (i start (1+ i)))
         (do ((rem (nthcdr start seq) (rest rem))
              (i start (1+ i)))

-            ((or (endp rem) (>= i end)) seq)
+            ((or (endp rem) (>= i end)))

           (declare (type list rem)
                    (type index i))
           (declare (type list rem)
                    (type index i))

-          (funcall write-function (first rem) stream))))
+          (funcall write-function stream (first rem)))))

       (string
       (string

-       (write-string* seq stream start end))
+       (%write-string seq stream start end))

       (vector
       (vector

-       (let ((write-function
-             (if (subtypep (stream-element-type stream) 'character)
-                 #'write-char
-                 #'write-byte)))
-        (do ((i start (1+ i)))
-            ((>= i end) seq)
-          (declare (type index i))
-          (funcall write-function (aref seq i) stream)))))))
-
-;;; (These were inline throughout this file, but that's not appropriate
-;;; globally.)
-(declaim (maybe-inline read-char unread-char read-byte listen))
+       (with-array-data ((data seq) (offset-start start) (offset-end end))
+        (labels
+            ((output-seq-in-loop ()
+               (let ((write-function
+                      (if (subtypep (stream-element-type stream) 'character)
+                          (ansi-stream-out stream)
+                          (ansi-stream-bout stream))))
+                 (do ((i offset-start (1+ i)))
+                     ((>= i offset-end))
+                   (declare (type index i))
+                   (funcall write-function stream (aref data i))))))
+          (typecase data
+            ((or (simple-array (unsigned-byte 8) (*))
+                 (simple-array (signed-byte 8) (*)))
+             (if (fd-stream-p stream)
+                 (output-raw-bytes stream data offset-start offset-end)
+                 (output-seq-in-loop)))
+            (t
+             (output-seq-in-loop))))))))
+  seq)
+\f
+;;;; etc.