X-Git-Url: http://git.kpe.io/?p=kmrcl.git;a=blobdiff_plain;f=strings.lisp;h=a9b3d0f9b320a95126b206348e852d812ea8a9b2;hp=0c5ae7c4ec47407e0e77b358a1bf4c713dee89b2;hb=09816397bfa39bd4b3c85e9f5fc05d30b073bacb;hpb=78b62107690123d8d7a1a400e4a1d744408a05b1

diff --git a/strings.lisp b/strings.lisp
index 0c5ae7c..a9b3d0f 100644
--- a/strings.lisp
+++ b/strings.lisp
@@ -227,17 +227,20 @@ list of characters and replacement strings."
 (defun make-usb8-array (len)
   (make-array len :element-type '(unsigned-byte 8)))
 
-(defun usb8-array-to-string (vec)
-  (declare (type (simple-array (unsigned-byte 8) (*)) vec))
-  (let* ((len (length vec))
+(defun usb8-array-to-string (vec &key (start 0) end)
+  (declare (type (simple-array (unsigned-byte 8) (*)) vec)
+	   (fixnum start))
+  (unless end
+    (setq end (length vec)))
+  (let* ((len (- end start))
 	 (str (make-string len)))
     (declare (fixnum len)
 	     (simple-string str)
-	     (optimize (speed 3)))
+	     (optimize (speed 3) (safety 0)))
     (do ((i 0 (1+ i)))
 	((= i len) str)
       (declare (fixnum i))
-      (setf (schar str i) (code-char (aref vec i))))))
+      (setf (schar str i) (code-char (aref vec (the fixnum (+ i start))))))))
 
 (defun string-to-usb8-array (str)
   (declare (simple-string str))