From 226590f8d1247314abf913cc1bc77621f8a5bca9 Mon Sep 17 00:00:00 2001
From: Jay Belanger <jay.p.belanger@gmail.com>
Date: Mon, 7 Feb 2011 16:25:31 -0600
Subject: [PATCH] calc/calc-units.el (math-logunits-quant): Add support for
 non-logarithmic units.

---
 lisp/ChangeLog          |  5 +++++
 lisp/calc/calc-units.el | 38 ++++++++++++++++++++------------------
 2 files changed, 25 insertions(+), 18 deletions(-)

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index a55a656af80..8826f884560 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2011-02-07  Jay Belanger  <jay.p.belanger@gmail.com>
+
+	* calc/calc-units.el (math-logunits-quant): Add support for
+	non-logarithmic units.
+
 2011-02-07  Ken Manheimer  <ken.manheimer@gmail.com>
 
 	* allout.el (allout-after-copy-or-kill-hook): New hook for
diff --git a/lisp/calc/calc-units.el b/lisp/calc/calc-units.el
index 65b3356b13a..569d5d3dc35 100644
--- a/lisp/calc/calc-units.el
+++ b/lisp/calc/calc-units.el
@@ -1737,26 +1737,28 @@ If EXPR is nil, return nil."
        (calc-binary-op "lu/" 'calcFunc-lupowerdiv arg)))))
 
 (defun math-logunits-quant (val ref power)
-  (let ((lunit (math-simplify (math-extract-logunits val))))
+  (let* ((units (math-simplify (math-extract-units val)))
+         (lunit (math-simplify (math-extract-logunits units))))
     (if (not (eq (car-safe lunit) 'var))
         (calc-record-why "*Improper logarithmic unit" lunit)
-      (if (not (eq 1 (math-simplify (math-extract-units (math-div val lunit)))))
-          (calc-record-why "*Inappropriate units" nil)
-        (let ((coeff (math-simplify (math-div val lunit))))
-          (if (equal lunit '(var dB var-dB))
-              (math-mul 
-               ref
-               (math-pow 
-                10
-                (math-div
-                 coeff
-                 (if power 10 20))))
-            (math-mul 
-             ref
-             (calcFunc-exp
-              (if power 
-                  (math-mul 2 coeff)
-                coeff)))))))))
+      (let ((runits (math-simplify (math-div units lunit)))
+            (coeff (math-simplify (math-div val units))))
+        (math-mul
+         (if (equal lunit '(var dB var-dB))
+             (math-mul 
+              ref
+              (math-pow 
+               10
+               (math-div
+                coeff
+                (if power 10 20))))
+           (math-mul 
+            ref
+            (calcFunc-exp
+             (if power 
+                 (math-mul 2 coeff)
+               coeff))))
+         runits)))))
 
 (defvar calc-logunits-field-reference)
 (defvar calc-logunits-power-reference)
-- 
2.39.5