X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fpprint.lisp;h=8c084d63ac546d764dca1be6bb114aae65f9dde6;hb=558e7ce44e6a8305474dc55adbdbc1f7119c9a5e;hp=57024e69e9dae44d56849ddbe70a912e85397fbc;hpb=dd2cc7dffe4e37177f5c8019f561130abd41d93e;p=sbcl.git

diff --git a/src/code/pprint.lisp b/src/code/pprint.lisp
index 57024e6..8c084d6 100644
--- a/src/code/pprint.lisp
+++ b/src/code/pprint.lisp
@@ -119,7 +119,7 @@
 
 (defun pretty-out (stream char)
   (declare (type pretty-stream stream)
-	   (type base-char char))
+	   (type character char))
   (cond ((char= char #\newline)
 	 (enqueue-newline stream :literal))
 	(t
@@ -364,21 +364,23 @@
 ;;;; tab support
 
 (defun compute-tab-size (tab section-start column)
-  (let ((origin (if (tab-sectionp tab) section-start 0))
-	(colnum (tab-colnum tab))
-	(colinc (tab-colinc tab)))
+  (let* ((origin (if (tab-sectionp tab) section-start 0))
+         (colnum (tab-colnum tab))
+         (colinc (tab-colinc tab))
+         (position (- column origin)))
     (cond ((tab-relativep tab)
 	   (unless (<= colinc 1)
-	     (let ((newposn (+ column colnum)))
+	     (let ((newposn (+ position colnum)))
 	       (let ((rem (rem newposn colinc)))
 		 (unless (zerop rem)
 		   (incf colnum (- colinc rem))))))
 	   colnum)
-	  ((<= column (+ colnum origin))
-	   (- (+ colnum origin) column))
-	  (t
+	  ((< position colnum)
+           (- colnum position))
+	  ((zerop colinc) 0)
+          (t
 	   (- colinc
-	      (rem (- column origin) colinc))))))
+	      (rem (- position colnum) colinc))))))
 
 (defun index-column (index stream)
   (let ((column (pretty-stream-buffer-start-column stream))
@@ -660,15 +662,15 @@
    *STANDARD-OUTPUT*) if it is a pretty-printing stream, and do
    nothing if not. KIND can be one of:
      :LINEAR - A line break is inserted if and only if the immediatly
-	containing section cannot be printed on one line.
+        containing section cannot be printed on one line.
      :MISER - Same as LINEAR, but only if ``miser-style'' is in effect.
-	(See *PRINT-MISER-WIDTH*.)
+        (See *PRINT-MISER-WIDTH*.)
      :FILL - A line break is inserted if and only if either:
        (a) the following section cannot be printed on the end of the
-	   current line,
+           current line,
        (b) the preceding section was not printed on a single line, or
        (c) the immediately containing section cannot be printed on one
-	   line and miser-style is in effect.
+           line and miser-style is in effect.
      :MANDATORY - A line break is always inserted.
    When a line break is inserted by any type of conditional newline, any
    blanks that immediately precede the conditional newline are ommitted
@@ -692,7 +694,7 @@
    and do nothing if not. (See PPRINT-LOGICAL-BLOCK.)  N is the indentation
    to use (in ems, the width of an ``m'') and RELATIVE-TO can be either:
      :BLOCK - Indent relative to the column the current logical block
-	started on.
+        started on.
      :CURRENT - Indent relative to the current column.
    The new indentation value does not take effect until the following line
    break."