calc/calc.el (calc-logunits-field-reference) Renamed from

`calc-default-field-reference-level'.
(calc-logunits-power-reference): Renamed from `calc-default-power-reference-level' 

calc/calc-units.el (math-logunits-quant):  Renamed from `math-logunits-level'
(math-logunits-plus):  Renamed from math-logcombine.
(calcFunc-luplus, calcFunc-luminus calc-luplus, calc-luminus): Remove functions.
(calcFunc-lufieldplus, calcFunc-lupowerplus, calcFunc-lufieldminus)
(calcFunc-lufieldminus,calc-logunits-plus calc-logunits-minus): New functions.
(calcFunc-fieldquant): Renamed from `calcFunc-fieldlevel'.
(calcFunc-powerquant): Renamed from `calcFunc-powerlevel'.
(calc-logunits-quantity): Renamed from `calc-level'.
(calcFunc-dbfieldlevel, calcFunc-dbpowerlevel, calcFunc-npfieldlevel)
(calcFunc-nppowerlevel,calc-logunits-dblevel, calc-logunits-nplevel)
(math-logunits-times, calcFunc-lufieldtimes, calcFunc-lupowertimes)
(calc-logunits-times, math-logunits-divide, calcFunc-lufielddiv)
(calcFunc-lupowerdiv,calc-logunits-divide,math-logunits-level):
New functions.

calc-help.el (calc-u-prefix-help): Removed "L" reference.
(calc-ul-prefix-help): Remove.
(calc-l-prefix-help): New function.
(calc-full-help): Add reference to `calc-l-prefix-help'.

calc-ext.el (calc-init-extensions): Update autoloads.

4 files changed, 240 insertions, 60 deletions

diff --git a/lisp/calc/calc-ext.el b/lisp/calc/calc-ext.el
index 71cd6c9d61..d3a9d98d62 100644
--- a/lisp/calc/calc-ext.el
+++ b/lisp/calc/calc-ext.el
@@ -421,6 +421,16 @@
   (define-key calc-mode-map "kP" 'calc-utpp)
   (define-key calc-mode-map "kT" 'calc-utpt)
 
+  (define-key calc-mode-map "l" nil)
+  (define-key calc-mode-map "lq" 'calc-logunits-quantity)
+  (define-key calc-mode-map "ld" 'calc-logunits-dblevel)
+  (define-key calc-mode-map "ln" 'calc-logunits-nplevel)
+  (define-key calc-mode-map "l+" 'calc-logunits-plus)
+  (define-key calc-mode-map "l-" 'calc-logunits-minus)
+  (define-key calc-mode-map "l*" 'calc-logunits-times)
+  (define-key calc-mode-map "l/" 'calc-logunits-divide)
+  (define-key calc-mode-map "l?" 'calc-l-prefix-help)
+
   (define-key calc-mode-map "m" nil)
   (define-key calc-mode-map "m?" 'calc-m-prefix-help)
   (define-key calc-mode-map "ma" 'calc-algebraic-mode)
@@ -546,10 +556,6 @@
   (define-key calc-mode-map "ud" 'calc-define-unit)
   (define-key calc-mode-map "ue" 'calc-explain-units)
   (define-key calc-mode-map "ug" 'calc-get-unit-definition)
-  (define-key calc-mode-map "ul+" 'calc-luplus)
-  (define-key calc-mode-map "ul-" 'calc-luminus)
-  (define-key calc-mode-map "ull" 'calc-level)
-  (define-key calc-mode-map "ul?" 'calc-ul-prefix-help)
   (define-key calc-mode-map "up" 'calc-permanent-units)
   (define-key calc-mode-map "ur" 'calc-remove-units)
   (define-key calc-mode-map "us" 'calc-simplify-units)
@@ -933,8 +939,12 @@ calc-store-value calc-var-name)
  ("calc-stuff" calc-explain-why calcFunc-clean
 calcFunc-pclean calcFunc-pfloat calcFunc-pfrac)
 
- ("calc-units" calcFunc-usimplify calcFunc-luplus
-calcFunc-luminus calcFunc-fieldlevel calcFunc-powerlevel
+ ("calc-units" calcFunc-usimplify calcFunc-lufieldplus
+calcFunc-lupowerplus calcFunc-lufieldminus calcFunc-lupowerminus
+calcFunc-lufieldtimes calcFunc-lupowertimes calcFunc-lufielddiv
+calcFunc-lupowerdiv calcFunc-fieldquant calcFunc-powerquant
+calcFunc-dbfieldlevel calcFunc-dbpowerlevel calcFunc-npfieldlevel
+calcFunc-nppowerlevel
 math-build-units-table math-build-units-table-buffer
 math-check-unit-name math-convert-temperature math-convert-units
 math-extract-units math-remove-units math-simplify-units
@@ -1166,7 +1176,9 @@ calc-convert-temperature calc-convert-units calc-define-unit
 calc-enter-units-table calc-explain-units calc-extract-units
 calc-get-unit-definition calc-permanent-units calc-quick-units
 calc-remove-units calc-simplify-units calc-undefine-unit
-calc-view-units-table calc-luplus calc-luminus calc-level)
+calc-view-units-table calc-logunits-quantity calc-logunits-dblevel
+calc-logunits-nplevel calc-logunits-plus calc-logunits-minus
+calc-logunits-times calc-logunits-divide)
 
  ("calc-vec" calc-arrange-vector calc-build-vector calc-cnorm
 calc-conj-transpose calc-cons calc-cross calc-kron calc-diag
diff --git a/lisp/calc/calc-help.el b/lisp/calc/calc-help.el
index c34c114dac..d688b31b3c 100644
--- a/lisp/calc/calc-help.el
+++ b/lisp/calc/calc-help.el
@@ -455,6 +455,7 @@ C-w  Describe how there is no warranty for Calc."
 	      calc-h-prefix-help
 	      calc-j-prefix-help
 	      calc-k-prefix-help
+	      calc-l-prefix-help
 	      calc-m-prefix-help
 	      calc-r-prefix-help
 	      calc-s-prefix-help
@@ -662,19 +663,18 @@ C-w  Describe how there is no warranty for Calc."
   (calc-do-prefix-help
    '("Simplify, Convert, Temperature-convert, Base-units"
      "Autorange; Remove, eXtract; Explain; View-table; 0-9"
-     "Define, Undefine, Get-defn, Permanent, Logarithmic"
+     "Define, Undefine, Get-defn, Permanent"
      "SHIFT + View-table-other-window"
      "SHIFT + stat: Mean, G-mean, Std-dev, Covar, maX, miN"
      "SHIFT + stat: + (sum), - (asum), * (prod), # (count)")
    "units/stat" ?u))
 
-(defun calc-ul-prefix-help ()
+(defun calc-l-prefix-help ()
   (interactive)
-  (if (eq this-command last-command)
-      (message "ul-")
-    (message "logarithmic-units: + (logarithmic), - (logarithmic), Level: ul-"))
-  (push ?l unread-command-events)
-  (push ?u unread-command-events))
+  (calc-do-prefix-help
+   '("Quantity, DB level, Np level"
+     "+, -, *, /")
+   "log units" ?l))
 
 (defun calc-v-prefix-help ()
   (interactive)
diff --git a/lisp/calc/calc-units.el b/lisp/calc/calc-units.el
index 782d2c4662..c6bcff7976 100644
--- a/lisp/calc/calc-units.el
+++ b/lisp/calc/calc-units.el
@@ -1567,7 +1567,7 @@ If EXPR is nil, return nil."
         (list '^ (math-extract-logunits (nth 1 expr)) (nth 2 expr))
       (if (member expr math-logunits) expr 1))))
 
-(defun math-logcombine (a b neg)
+(defun math-logunits-plus (a b neg power)
   (let ((aunit (math-simplify (math-extract-logunits a))))
     (if (not (eq (car-safe aunit) 'var))
         (calc-record-why "*Improper logarithmic unit" aunit)
@@ -1583,49 +1583,160 @@ If EXPR is nil, return nil."
               (calc-record-why "*Improper coefficients" nil)
             (math-mul 
              (if (equal aunit '(var dB var-dB))
-                 (math-mul 10
-                           (calcFunc-log10
-                            (if neg
-                                (math-sub
-                                 (math-pow 10 (math-div acoeff 10))
-                                 (math-pow 10 (math-div bcoeff 10)))
-                              (math-add
-                               (math-pow 10 (math-div acoeff 10))
-                               (math-pow 10 (math-div bcoeff 10))))))
-               (calcFunc-ln
-                (if neg
-                    (math-sub
-                     (calcFunc-exp acoeff)
-                     (calcFunc-exp bcoeff))
-                  (math-add
-                   (calcFunc-exp acoeff)
-                   (calcFunc-exp bcoeff)))))
+                 (let ((coef (if power 10 20)))
+                   (math-mul coef
+                             (calcFunc-log10
+                              (if neg
+                                  (math-sub
+                                   (math-pow 10 (math-div acoeff coef))
+                                   (math-pow 10 (math-div bcoeff coef)))
+                                (math-add
+                                 (math-pow 10 (math-div acoeff coef))
+                                 (math-pow 10 (math-div bcoeff coef)))))))
+               (let ((coef (if power 2 1)))
+                 (math-div
+                  (calcFunc-ln
+                   (if neg
+                       (math-sub
+                        (calcFunc-exp (math-mul coef acoeff))
+                        (calcFunc-exp (math-mul coef bcoeff)))
+                     (math-add
+                      (calcFunc-exp (math-mul coef acoeff))
+                      (calcFunc-exp (math-mul coef bcoeff)))))
+                  coef)))
              units)))))))
 
-(defun calcFunc-luplus (a b)
-  (math-logcombine a b nil))
+(defun calcFunc-lufieldplus (a b)
+  (math-logunits-plus a b nil nil))
 
-(defun calcFunc-luminus (a b)
-  (math-logcombine a b t))
+(defun calcFunc-lupowerplus (a b)
+  (math-logunits-plus a b nil t))
 
-(defun calc-luplus (arg)
+(defun calcFunc-lufieldminus (a b)
+  (math-logunits-plus a b t nil))
+
+(defun calcFunc-lupowerminus (a b)
+  (math-logunits-plus a b t t))
+
+(defun calc-logunits-plus (arg)
   (interactive "P")
   (calc-slow-wrapper
    (if (calc-is-inverse)
-       (calc-binary-op "lu-" 'calcFunc-luminus arg)
-     (calc-binary-op "lu+" 'calcFunc-luplus arg))))
-
-(defun calc-luminus (arg)
+       (if (calc-is-hyperbolic)
+           (calc-binary-op "lu-" 'calcFunc-lufieldminus arg)
+         (calc-binary-op "lu-" 'calcFunc-lupowerminus arg))
+     (if (calc-is-hyperbolic)
+         (calc-binary-op "lu+" 'calcFunc-lufieldplus arg)
+       (calc-binary-op "lu+" 'calcFunc-lupowerplus arg)))))
+
+(defun calc-logunits-minus (arg)
+  (interactive "P")
+  (calc-slow-wrapper
+   (if (calc-is-inverse)
+       (if (calc-is-hyperbolic)
+           (calc-binary-op "lu+" 'calcFunc-lufieldplus arg)
+         (calc-binary-op "lu+" 'calcFunc-lupowerplus arg))
+     (if (calc-is-hyperbolic)
+         (calc-binary-op "lu-" 'calcFunc-lufieldminus arg)
+       (calc-binary-op "lu-" 'calcFunc-lupowerminus arg)))))
+
+(defun math-logunits-times (a b power)
+  (let (logunit coef units number)
+    (cond
+     ((and
+       (setq logunit (math-simplify (math-extract-logunits a)))
+       (eq (car-safe logunit) 'var)
+       (eq (math-simplify (math-extract-units b)) 1))
+      (setq coef (math-simplify (math-remove-units a))
+            units (math-extract-units a)
+            number b))
+     ((and
+       (setq logunit (math-simplify (math-extract-logunits b)))
+       (eq (car-safe logunit) 'var)
+       (eq (math-simplify (math-extract-units a)) 1))
+      (setq coef (math-simplify (math-remove-units b))
+            units (math-extract-units b)
+            number a))
+     (t (setq logunit nil)))
+    (if logunit
+        (cond
+         ((equal logunit '(var dB var-dB))
+          (math-simplify
+           (math-mul
+            (math-add
+             coef 
+             (math-mul (if power 10 20)
+                       (calcFunc-log10 number)))
+            units)))
+         (t
+          (math-simplify
+           (math-mul
+            (math-add
+             coef 
+             (math-div (calcFunc-ln number) (if power 2 1)))
+            units))))
+      (calc-record-why "*Improper units" nil))))
+
+(defun math-logunits-divide (a b power)
+  (let ((logunit (math-simplify (math-extract-logunits a))))
+    (if (not (eq (car-safe logunit) 'var))
+        (calc-record-why "*Improper logarithmic unit" logunit)
+      (if (math-units-in-expr-p b nil)
+          (calc-record-why "*Improper units quantity" b)
+        (let* ((units (math-extract-units a))
+               (coef (math-simplify (math-remove-units a))))
+          (cond
+           ((equal logunit '(var dB var-dB))
+            (math-simplify
+             (math-mul
+              (math-sub
+               coef 
+               (math-mul (if power 10 20)
+                         (calcFunc-log10 b)))
+              units)))
+         (t
+          (math-simplify
+           (math-mul
+            (math-sub
+             coef 
+             (math-div (calcFunc-ln b) (if power 2 1)))
+            units)))))))))
+
+(defun calcFunc-lufieldtimes (a b)
+  (math-logunits-times a b nil))
+
+(defun calcFunc-lupowertimes (a b)
+  (math-logunits-times a b t))
+
+(defun calc-logunits-times (arg)
   (interactive "P")
   (calc-slow-wrapper
    (if (calc-is-inverse)
-       (calc-binary-op "lu+" 'calcFunc-luplus arg)
-     (calc-binary-op "lu-" 'calcFunc-luminus arg))))
+       (if (calc-is-hyperbolic)
+           (calc-binary-op "lu/" 'calcFunc-lufielddiv arg)
+         (calc-binary-op "lu/" 'calcFunc-lupowerdiv arg))
+     (if (calc-is-hyperbolic)
+         (calc-binary-op "lu*" 'calcFunc-lufieldtimes arg)
+       (calc-binary-op "lu*" 'calcFunc-lupowertimes arg)))))
 
-;(defun calcFunc-lmul (a b)
+(defun calcFunc-lufielddiv (a b)
+  (math-logunits-divide a b nil))
 
+(defun calcFunc-lupowerdiv (a b)
+  (math-logunits-divide a b t))
 
-(defun math-logunit-level (val ref power)
+(defun calc-logunits-divide (arg)
+  (interactive "P")
+  (calc-slow-wrapper
+   (if (calc-is-inverse)
+       (if (calc-is-hyperbolic)
+           (calc-binary-op "lu*" 'calcFunc-lufieldtimes arg)
+         (calc-binary-op "lu*" 'calcFunc-lupowertimes arg))
+     (if (calc-is-hyperbolic)
+         (calc-binary-op "lu/" 'calcFunc-lufielddiv arg)
+       (calc-binary-op "lu/" 'calcFunc-lupowerdiv arg)))))
+
+(defun math-logunits-quant (val ref power)
   (let ((lunit (math-simplify (math-extract-logunits val))))
     (if (not (eq (car-safe lunit) 'var))
         (calc-record-why "*Improper logarithmic unit" lunit)
@@ -1647,29 +1758,86 @@ If EXPR is nil, return nil."
                   (math-mul 2 coeff)
                 coeff)))))))))
 
-(defvar calc-default-field-reference-level)
-(defvar calc-default-power-reference-level)
+(defvar calc-logunits-field-reference)
+(defvar calc-logunits-power-reference)
 
-(defun calcFunc-fieldlevel (val &optional ref)
+(defun calcFunc-fieldquant (val &optional ref)
   (unless ref
-    (setq ref (math-read-expr calc-default-field-reference-level)))
-  (math-logunit-level val ref nil))
+    (setq ref (math-read-expr calc-logunits-field-reference)))
+  (math-logunits-quant val ref nil))
 
-(defun calcFunc-powerlevel (val &optional ref)
+(defun calcFunc-powerquant (val &optional ref)
   (unless ref
-    (setq ref (math-read-expr calc-default-power-reference-level)))
-  (math-logunit-level val ref t))
+    (setq ref (math-read-expr calc-logunits-power-reference)))
+  (math-logunits-quant val ref t))
+
+(defun calc-logunits-quantity (arg)
+  (interactive "P")
+  (calc-slow-wrapper
+   (if (calc-is-hyperbolic)
+       (if (calc-is-option)
+           (calc-binary-op "lupq" 'calcFunc-fieldquant arg)
+         (calc-unary-op "lupq" 'calcFunc-fieldquant arg))
+     (if (calc-is-option)
+         (calc-binary-op "lufq" 'calcFunc-powerquant arg)
+       (calc-unary-op "lufq" 'calcFunc-powerquant arg)))))
+
+(defun math-logunits-level (val ref db power)
+  "Compute the value of VAL in decibels or nepers."
+      (let* ((ratio (math-simplify-units (math-div val ref)))
+             (units (math-simplify (math-extract-units ratio))))
+        (math-mul
+         (if db
+             (math-mul
+              (math-mul (if power 10 20)
+                        (calcFunc-log10 ratio))
+              '(var dB var-dB))
+           (math-mul
+            (math-div (calcFunc-ln ratio) (if power 2 1))
+            '(var Np var-Np)))
+         units)))
+
+(defun calcFunc-dbfieldlevel (val &optional ref)
+  (unless ref
+    (setq ref (math-read-expr calc-logunits-field-reference)))
+  (math-logunits-level val ref t nil))
+
+(defun calcFunc-dbpowerlevel (val &optional ref)
+  (unless ref
+    (setq ref (math-read-expr calc-logunits-power-reference)))
+  (math-logunits-level val ref t t))
+
+(defun calcFunc-npfieldlevel (val &optional ref)
+  (unless ref
+    (setq ref (math-read-expr calc-logunits-field-reference)))
+  (math-logunits-level val ref nil nil))
+
+(defun calcFunc-nppowerlevel (val &optional ref)
+  (unless ref
+    (setq ref (math-read-expr calc-logunits-power-reference)))
+  (math-logunits-level val ref nil t))
+
+(defun calc-logunits-dblevel (arg)
+  (interactive "P")
+  (calc-slow-wrapper
+   (if (calc-is-hyperbolic)
+       (if (calc-is-option)
+           (calc-binary-op "ludb" 'calcFunc-dbfieldlevel arg)
+         (calc-unary-op "ludb" 'calcFunc-dbfieldlevel arg))
+     (if (calc-is-option)
+         (calc-binary-op "ludb" 'calcFunc-dbpowerlevel arg)
+       (calc-unary-op "ludb" 'calcFunc-dbpowerlevel arg)))))
 
-(defun calc-level (arg)
+(defun calc-logunits-nplevel (arg)
   (interactive "P")
   (calc-slow-wrapper
    (if (calc-is-hyperbolic)
        (if (calc-is-option)
-           (calc-binary-op "plvl" 'calcFunc-powerlevel arg)
-         (calc-unary-op "plvl" 'calcFunc-powerlevel arg))
+           (calc-binary-op "lunp" 'calcFunc-npfieldlevel arg)
+         (calc-unary-op "lunp" 'calcFunc-npfieldlevel arg))
      (if (calc-is-option)
-         (calc-binary-op "flvl" 'calcFunc-fieldlevel arg)
-       (calc-unary-op "flvl" 'calcFunc-fieldlevel arg)))))
+         (calc-binary-op "lunp" 'calcFunc-nppowerlevel arg)
+       (calc-unary-op "lunp" 'calcFunc-nppowerlevel arg)))))
 
 (provide 'calc-units)
 
diff --git a/lisp/calc/calc.el b/lisp/calc/calc.el
index 8316111597..72ddddeb32 100644
--- a/lisp/calc/calc.el
+++ b/lisp/calc/calc.el
@@ -434,13 +434,13 @@ by displaying the sub-formula in `calc-selected-face'."
   :group 'calc
   :type 'boolean)
 
-(defcustom calc-default-field-reference-level
+(defcustom calc-logunits-field-reference
   "20 uPa"
   "The default reference level for logarithmic units (field)."
   :group 'calc
   :type '(string))
 
-(defcustom calc-default-power-reference-level
+(defcustom calc-logunits-power-reference
   "mW"
   "The default reference level for logarithmic units (power)."
   :group 'calc