1.0.23.40: export page sizes to C with LU suffix

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

diff --git a/src/code/array.lisp b/src/code/array.lisp
index 60a2f0b..266c737 100644 (file)
--- a/src/code/array.lisp
+++ b/src/code/array.lisp
@@ -776,7 +776,7 @@ of specialized arrays is supported."
                   :datum arg
                   :expected-type (list 'integer 0 max)
                   :format-control "The new fill pointer, ~S, is larger than the length of the vector (~S.)"
-                  arg max)))
+                  :format-arguments (list arg max))))
         (t
          (error 'simple-type-error
                 :datum vector
@@ -979,12 +979,12 @@ of specialized arrays is supported."
                                        initial-element-p))
                    (if (adjustable-array-p array)
                        (set-array-header array new-data new-length
-                                         new-length 0 dimensions nil)
+                                         nil 0 dimensions nil)
                        (let ((new-array
                               (make-array-header
                                sb!vm:simple-array-widetag array-rank)))
                          (set-array-header new-array new-data new-length
-                                           new-length 0 dimensions nil)))))))))))
+                                           nil 0 dimensions nil)))))))))))
 
 
 (defun get-new-fill-pointer (old-array new-array-size fill-pointer)
@@ -1083,6 +1083,30 @@ of specialized arrays is supported."
       (setf (%array-dimension array 0) dimensions))
   (setf (%array-displaced-p array) displacedp)
   array)
+
+;;; User visible extension
+(declaim (ftype (function (array) (values (simple-array * (*)) &optional))
+                array-storage-vector))
+(defun array-storage-vector (array)
+  "Returns the underlying storage vector of ARRAY, which must be a non-displaced array.
+
+In SBCL, if ARRAY is a of type \(SIMPLE-ARRAY * \(*)), it is its own storage
+vector. Multidimensional arrays, arrays with fill pointers, and adjustable
+arrays have an underlying storage vector with the same ARRAY-ELEMENT-TYPE as
+ARRAY, which this function returns.
+
+Important note: the underlying vector is an implementation detail. Even though
+this function exposes it, changes in the implementation may cause this
+function to be removed without further warning."
+  ;; KLUDGE: Without TRULY-THE the system is not smart enough to figure out that
+  ;; the return value is always of the known type.
+  (truly-the (simple-array * (*))
+             (if (array-header-p array)
+                 (if (%array-displaced-p array)
+                     (error "~S cannot be used with displaced arrays. Use ~S instead."
+                            'array-storage-vector 'array-displacement)
+                     (%array-data-vector array))
+                 array)))
 \f
 ;;;; used by SORT