*** empty log message ***

original commit: 6986dd5d52829308189ef6e3d6f5be94a28186cc

collects/parser-tools/lex.ss

@@ -85,47 +85,47 @@
 	    (not (andmap (lambda (x) (>= x 0)) offsets)))
 	(raise-type-error 'make-lex-buf "list of 3 non-negative exact integers" 1 ip offsets))
        (else
-	(make-lex-buffer ip null null (add1 (caddr offsets)) (add1 (car offsets)) (add1 (cadr offsets)) null null))))))
+	(make-lex-buffer ip null null (caddr offsets) (car offsets) (cadr offsets) null null))))))
+
+  (define (get-next lb)
+    (cond
+     ((null? (lex-buffer-from lb)) 
+      (read-char (lex-buffer-ip lb)))
+     (else 
+      (begin0
+       (car (lex-buffer-from lb))
+       (set-lex-buffer-from! lb (cdr (lex-buffer-from lb)))))))
 
   ;; next-char: lex-buf -> c
   ;; gets the next character from the buffer
   (define (next-char lb)
-    (let ((get-next
+    (let ((char-in
-           (lambda ()
+	   (let ((real-char (get-next lb)))
-	     (cond
+	     (if (eq? #\return real-char)
-	      ((null? (lex-buffer-from lb)) 
+		 (let ((second-char (get-next)))
-	       (read-char (lex-buffer-ip lb)))
+		   (if (not (eq? second-char #\newline))
-	      (else 
+		       (set-lex-buffer-from! 
-	       (begin0
+			lb 
-		(car (lex-buffer-from lb))
+			(cons second-char (lex-buffer-from lb))))
-		(set-lex-buffer-from! lb (cdr (lex-buffer-from lb)))))))))
+		   #\newline)
-      (let ((char-in
+		 real-char))))
-	     (let ((real-char (get-next)))
+      (set-lex-buffer-to! lb (cons char-in (lex-buffer-to lb)))
-	       (if (eq? #\return real-char)
+      (cond 
-		   (let ((second-char (get-next)))
+       ((eq? #\tab char-in)
-		     (if (not (eq? second-char #\newline))
+	(let ((skip-amt (- 8 (modulo (lex-buffer-col lb) 8))))
-			 (set-lex-buffer-from! 
+	  (set-lex-buffer-tab-skips! lb (cons skip-amt (lex-buffer-tab-skips lb)))
-			  lb 
+	  (set-lex-buffer-col! lb (+ skip-amt (lex-buffer-col lb)))))
-			  (cons second-char (lex-buffer-from lb))))
+       ((eq? #\newline char-in)
-		     #\newline)
+	(set-lex-buffer-line-lengths!
-		   real-char))))
+	 lb
-	(set-lex-buffer-to! lb (cons char-in (lex-buffer-to lb)))
+	 (cons (lex-buffer-col lb)
-	(cond 
+	       (lex-buffer-line-lengths lb)))
-	 ((eq? #\tab char-in)
+	(set-lex-buffer-line! lb (add1 (lex-buffer-line lb)))
-	  (let ((skip-amt (- 8 (modulo (lex-buffer-col lb) 8))))
+	(set-lex-buffer-col! lb 1))
-            (set-lex-buffer-tab-skips! lb (cons skip-amt (lex-buffer-tab-skips lb)))
+       (else
-	    (set-lex-buffer-col! lb (+ skip-amt (lex-buffer-col lb)))))
+	(set-lex-buffer-col! lb (add1 (lex-buffer-col lb)))))
-	 ((eq? #\newline char-in)
+      (set-lex-buffer-offset! lb (add1 (lex-buffer-offset lb)))
-	  (set-lex-buffer-line-lengths!
+      char-in))
-	   lb
-	   (cons (lex-buffer-col lb)
-		 (lex-buffer-line-lengths lb)))
-	  (set-lex-buffer-line! lb (add1 (lex-buffer-line lb)))
-	  (set-lex-buffer-col! lb 1))
-	 (else
-	  (set-lex-buffer-col! lb (add1 (lex-buffer-col lb)))))
-        (set-lex-buffer-offset! lb (add1 (lex-buffer-offset lb)))
-        char-in)))
   
   ;; push-back: lex-buf * int -> c list
   ;; pushes the last read i characters back to be read again