\f
;;;; miscellaneous accessor functions
-;;; These functions are needed by the interpreter, 'cause the compiler
-;;; inlines them.
+;;; These functions are only needed by the interpreter, 'cause the
+;;; compiler inlines them.
(macrolet ((def-frob (name)
`(progn
(defun ,name (array)
(fixnum index))
(%check-bound array bound index))
-;;; the guts of the WITH-ARRAY-DATA macro (except when DEFTRANSFORM
-;;; %WITH-ARRAY-DATA takes over)
(defun %with-array-data (array start end)
- (declare (array array) (type index start) (type (or index null) end))
- ;; FIXME: The VALUES declaration here is correct, but as of SBCL
- ;; 0.6.6, the corresponding runtime assertion is implemented
- ;; horribly inefficiently, with a full call to %TYPEP for every
- ;; call to this function. As a quick fix, I commented it out,
- ;; but the proper fix would be to fix up type checking.
- ;;
- ;; A simpler test case for the optimization bug is
- ;; (DEFUN FOO (X)
- ;; (DECLARE (TYPE INDEXOID X))
- ;; (THE (VALUES INDEXOID)
- ;; (VALUES X)))
- ;; which also compiles to a full call to %TYPEP.
- #+nil (declare (values (simple-array * (*)) index index index))
- (let* ((size (array-total-size array))
- (end (cond (end
- (unless (<= end size)
- (error "End ~D is greater than total size ~D."
- end size))
- end)
- (t size))))
- (when (> start end)
- (error "Start ~D is greater than end ~D." start end))
- (do ((data array (%array-data-vector data))
- (cumulative-offset 0
- (+ cumulative-offset
- (%array-displacement data))))
- ((not (array-header-p data))
- (values (the (simple-array * (*)) data)
- (the index (+ cumulative-offset start))
- (the index (+ cumulative-offset end))
- (the index cumulative-offset)))
- (declare (type index cumulative-offset)))))
+ (%with-array-data-macro array start end :fail-inline? t))
+
+;;; It'd waste space to expand copies of error handling in every
+;;; inline %WITH-ARRAY-DATA, so we have them call this function
+;;; instead. This is just a wrapper which is known never to return.
+(defun failed-%with-array-data (array start end)
+ (declare (notinline %with-array-data))
+ (%with-array-data array start end)
+ (error "internal error: shouldn't be here with valid parameters"))
\f
;;;; MAKE-ARRAY
(defun array-rank (array)
#!+sb-doc
- "Returns the number of dimensions of the Array."
+ "Return the number of dimensions of ARRAY."
(if (array-header-p array)
(%array-rank array)
1))
(defun array-dimension (array axis-number)
#!+sb-doc
- "Returns length of dimension Axis-Number of the Array."
+ "Returns the length of dimension AXIS-NUMBER of ARRAY."
(declare (array array) (type index axis-number))
(cond ((not (array-header-p array))
(unless (= axis-number 0)
(defun array-dimensions (array)
#!+sb-doc
- "Returns a list whose elements are the dimensions of the array"
+ "Return a list whose elements are the dimensions of the array"
(declare (array array))
(if (array-header-p array)
(do ((results nil (cons (array-dimension array index) results))
(defun array-total-size (array)
#!+sb-doc
- "Returns the total number of elements in the Array."
+ "Return the total number of elements in the Array."
(declare (array array))
(if (array-header-p array)
(%array-available-elements array)
(defun array-displacement (array)
#!+sb-doc
- "Returns values of :displaced-to and :displaced-index-offset options to
- make-array, or the defaults nil and 0 if not a displaced array."
- (declare (array array))
- (values (%array-data-vector array) (%array-displacement array)))
+ "Return the values of :DISPLACED-TO and :DISPLACED-INDEX-offset
+ options to MAKE-ARRAY, or NIL and 0 if not a displaced array."
+ (declare (type array array))
+ (if (and (array-header-p array) ; if unsimple and
+ (%array-displaced-p array)) ; displaced
+ (values (%array-data-vector array) (%array-displacement array))
+ (values nil 0)))
(defun adjustable-array-p (array)
#!+sb-doc
- "Returns T if (adjust-array array...) would return an array identical
+ "Return T if (ADJUST-ARRAY ARRAY...) would return an array identical
to the argument, this happens for complex arrays."
(declare (array array))
(not (typep array 'simple-array)))
:format-control "~S is not an array with a fill pointer."
:format-arguments (list vector))))
+;;; FIXME: It'd probably make sense to use a MACROLET to share the
+;;; guts of VECTOR-PUSH between VECTOR-PUSH-EXTEND. Such a macro
+;;; should probably be based on the VECTOR-PUSH-EXTEND code (which is
+;;; new ca. sbcl-0.7.0) rather than the VECTOR-PUSH code (which dates
+;;; back to CMU CL).
(defun vector-push (new-el array)
#!+sb-doc
"Attempt to set the element of ARRAY designated by its fill pointer
(defun vector-push-extend (new-element
vector
&optional
- (extension (1+ (length vector))))
+ (extension nil extension-p))
#!+sb-doc
- "This is like Vector-Push except that if the fill pointer gets too
- large, the Vector is extended rather than Nil being returned."
+ "This is like VECTOR-PUSH except that if the fill pointer gets too
+ large, VECTOR is extended to allow the push to work."
+ (declare (type vector vector))
+ (let ((old-fill-pointer (fill-pointer vector)))
+ (declare (type index old-fill-pointer))
+ (when (= old-fill-pointer (%array-available-elements vector))
+ (adjust-array vector (+ old-fill-pointer
+ (if extension-p
+ (the (integer 1 #.most-positive-fixnum)
+ extension)
+ (1+ old-fill-pointer)))))
+ (setf (%array-fill-pointer vector)
+ (1+ old-fill-pointer))
+ ;; Wrapping the type test and the AREF in the same WITH-ARRAY-DATA
+ ;; saves some time.
+ (with-array-data ((v vector) (i old-fill-pointer) (end)
+ :force-inline t)
+ (declare (ignore end) (optimize (safety 0)))
+ (if (simple-vector-p v) ; if common special case
+ (setf (aref v i) new-element)
+ (setf (aref v i) new-element)))
+ old-fill-pointer))
+
+(defun vector-push-extend (new-element
+ vector
+ &optional
+ (extension (1+ (length vector))))
(declare (vector vector) (fixnum extension))
(let ((fill-pointer (fill-pointer vector)))
(declare (fixnum fill-pointer))
(error "bogus value for :FILL-POINTER in ADJUST-ARRAY: ~S"
fill-pointer))))
+;;; Destructively alter VECTOR, changing its length to NEW-LENGTH,
+;;; which must be less than or equal to its current length.
(defun shrink-vector (vector new-length)
- #!+sb-doc
- "Destructively alter VECTOR, changing its length to NEW-LENGTH, which
- must be less than or equal to its current length."
(declare (vector vector))
(unless (array-header-p vector)
(macrolet ((frob (name &rest things)
(setf (%array-fill-pointer vector) new-length)
vector)
+;;; Fill in array header with the provided information, and return the array.
(defun set-array-header (array data length fill-pointer displacement dimensions
&optional displacedp)
- #!+sb-doc
- "Fills in array header with provided information. Returns array."
(setf (%array-data-vector array) data)
(setf (%array-available-elements array) length)
(cond (fill-pointer
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