X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Farray.lisp;h=d300256604807ea764b00b2abd17180b97a900dc;hb=15d6e7c9a2c3234f95dfe278046fa2fee1b0c007;hp=733b8c36b735f03c19e1379156c7384e81a73ae8;hpb=084168e1524a6493bc0f9d1697753d31239b158d;p=sbcl.git

diff --git a/src/code/array.lisp b/src/code/array.lisp
index 733b8c3..d300256 100644
--- a/src/code/array.lisp
+++ b/src/code/array.lisp
@@ -538,7 +538,25 @@
 	 (error "Axis number ~W is too big; ~S only has ~D dimension~:P."
 		axis-number array (%array-rank array)))
 	(t
-	 (%array-dimension array axis-number))))
+	 ;; ANSI sayeth (ADJUST-ARRAY dictionary entry): 
+	 ;; 
+	 ;;   "If A is displaced to B, the consequences are
+	 ;;   unspecified if B is adjusted in such a way that it no
+	 ;;   longer has enough elements to satisfy A.
+	 ;;
+	 ;; In situations where this matters we should be doing a
+	 ;; bounds-check, which in turn uses ARRAY-DIMENSION -- so
+	 ;; this seems like a good place to signal an error.
+	 (multiple-value-bind (target offset) (array-displacement array)
+	   (when (and target 
+		      (> (array-total-size array)
+			 (- (array-total-size target) offset)))
+	       (error 'displaced-to-array-too-small-error
+		      :format-control "~@<The displaced-to array is too small. ~S ~
+                                      elements after offset required, ~S available.~:@>"
+		      :format-arguments (list (array-total-size array) 
+					      (- (array-total-size target) offset))))
+	   (%array-dimension array axis-number)))))
 
 (defun array-dimensions (array)
   #!+sb-doc
@@ -643,7 +661,9 @@
     (declare (fixnum fill-pointer))
     (when (= fill-pointer (%array-available-elements vector))
       (adjust-array vector (+ fill-pointer extension)))
-    (setf (aref vector fill-pointer) new-element)
+    ;; disable bounds checking
+    (locally (declare (optimize (safety 0)))
+      (setf (aref vector fill-pointer) new-element))
     (setf (%array-fill-pointer vector) (1+ fill-pointer))
     fill-pointer))
 
@@ -656,9 +676,12 @@
     (declare (fixnum fill-pointer))
     (if (zerop fill-pointer)
 	(error "There is nothing left to pop.")
-	(aref array
-	      (setf (%array-fill-pointer array)
-		    (1- fill-pointer))))))
+	;; disable bounds checking (and any fixnum test)
+	(locally (declare (optimize (safety 0)))
+	  (aref array
+		(setf (%array-fill-pointer array)
+		      (1- fill-pointer)))))))
+
 
 ;;;; ADJUST-ARRAY