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1 | ;;; calculator.el --- A simple pocket calculator. |
2 | ||
3 | ;; Copyright (C) 1998 by Free Software Foundation, Inc. | |
4 | ||
5 | ;; Author: Eli Barzilay <eli@lambda.cs.cornell.edu> | |
6 | ;; Keywords: tools, convenience | |
86f1e1ec | 7 | ;; Time-stamp: <2000-02-16 21:07:54 eli> |
d240a249 GM |
8 | |
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify it | |
12 | ;; under the terms of the GNU General Public License as published by the | |
13 | ;; Free Software Foundation; either version 2, or (at your option) any | |
14 | ;; later version. | |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, but | |
17 | ;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | ;; General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
24 | ;; MA 02111-1307, USA. | |
25 | ||
26 | ;;; Commentary: | |
27 | ;; | |
28 | ;; A simple pocket calculator for Emacs. | |
29 | ;; Why touch your mouse to get xcalc (or calc.exe), when you have Emacs? | |
30 | ;; | |
31 | ;; If this is not part of your Emacs distribution, then simply bind | |
32 | ;; `calculator' to a key and make it an autoloaded function, e.g.: | |
33 | ;; (autoload 'calculator "calculator" | |
34 | ;; "Run the pocket calculator." t) | |
35 | ;; (global-set-key [(control return)] 'calculator) | |
36 | ;; | |
37 | ;; Written by Eli Barzilay: Maze is Life! eli@cs.cornell.edu | |
38 | ;; http://www.cs.cornell.edu/eli | |
39 | ;; | |
40 | ;; For latest version, check | |
41 | ;; http://www.cs.cornell.edu/eli/misc/calculator.el | |
42 | ||
43 | ||
44 | (eval-and-compile | |
45 | (if (fboundp 'defgroup) nil | |
46 | (defmacro defgroup (&rest forms) nil) | |
47 | (defmacro defcustom (s v d &rest r) (list 'defvar s v d)))) | |
48 | ||
49 | ;;; Customization: | |
50 | ||
51 | (defgroup calculator nil | |
52 | "Simple pocket calculator." | |
53 | :prefix "calculator" | |
54 | :group 'tools | |
55 | :group 'convenience) | |
56 | ||
57 | (defcustom calculator-electric-mode nil | |
58 | "*Run `calculator' electrically, in the echo area. | |
59 | Note that if you use electric-mode, you wouldn't be able to use | |
60 | conventional help keys." | |
61 | :type 'boolean | |
62 | :group 'calculator) | |
63 | ||
86f1e1ec GM |
64 | (defcustom calculator-use-menu t |
65 | "*Make `calculator' create a menu. | |
66 | Note that this requires easymenu. Must be set before loading." | |
67 | :type 'boolean | |
68 | :group 'calculator) | |
69 | ||
d240a249 GM |
70 | (defcustom calculator-bind-escape nil |
71 | "*If non-nil, set escape to exit the calculator." | |
72 | :type 'boolean | |
73 | :group 'calculator) | |
74 | ||
75 | (defcustom calculator-unary-style 'postfix | |
76 | "*Value is either 'prefix or 'postfix. | |
77 | This determines the default behavior of unary operators." | |
78 | :type '(choice (const prefix) (const postfix)) | |
79 | :group 'calculator) | |
80 | ||
81 | (defcustom calculator-prompt "Calculator=%s> " | |
82 | "*The prompt used by the pocket calculator. | |
83 | It should contain a \"%s\" somewhere that will indicate the i/o radixes, | |
84 | this string will be a two-character string as described in the | |
85 | documentation for `calculator-mode'." | |
86 | :type 'string | |
87 | :group 'calculator) | |
88 | ||
89 | (defcustom calculator-epsilon 1e-15 | |
90 | "*A threshold for results. | |
91 | If any result computed in `calculator-funcall' is smaller than this in | |
92 | its absolute value, then zero will be returned." | |
93 | :type 'number | |
94 | :group 'calculator) | |
95 | ||
96 | (defcustom calculator-number-format "%1.3f" | |
97 | "*The calculator's string used to display normal numbers." | |
98 | :type 'string | |
99 | :group 'calculator) | |
100 | ||
101 | (defcustom calculator-number-exp-ulimit 1e16 | |
102 | "*The calculator's upper limit for normal numbers." | |
103 | :type 'number | |
104 | :group 'calculator) | |
105 | ||
106 | (defcustom calculator-number-exp-llimit 0.001 | |
107 | "*The calculator's lower limit for normal numbers." | |
108 | :type 'number | |
109 | :group 'calculator) | |
110 | ||
111 | (defcustom calculator-number-exp-format "%g" | |
112 | "*The calculator's string used to display exponential numbers." | |
113 | :type 'string | |
114 | :group 'calculator) | |
115 | ||
116 | (defcustom calculator-show-integers t | |
117 | "*Non-nil value means delete all zero digits after the decimal point." | |
118 | :type 'boolean | |
119 | :group 'calculator) | |
120 | ||
121 | (defcustom calculator-2s-complement nil | |
122 | "*If non-nil, show negative numbers in 2s complement in radix modes. | |
123 | Otherwise show as a negative number." | |
124 | :type 'boolean | |
125 | :group 'calculator) | |
126 | ||
127 | (defcustom calculator-mode-hook nil | |
128 | "*List of hook functions run by `calculator-mode'." | |
129 | :type 'hook | |
130 | :group 'calculator) | |
131 | ||
132 | (defcustom calculator-user-registers nil | |
133 | "*An association list of user-defined register bindings. | |
134 | ||
135 | Each element in this list is a list of a character and a number that | |
136 | will be stored in that character's register. | |
137 | ||
138 | For example, use this to define the golden ratio number: | |
139 | (setq calculator-user-registers '((?g . 1.61803398875)))" | |
140 | :type '(repeat (cons character number)) | |
141 | :set '(lambda (_ val) | |
142 | (and (boundp 'calculator-registers) | |
143 | (setq calculator-registers | |
144 | (append val calculator-registers))) | |
145 | (setq calculator-user-registers val)) | |
146 | :group 'calculator) | |
147 | ||
148 | (defcustom calculator-user-operators nil | |
149 | "*A list of additional operators. | |
150 | ||
151 | This is a list in the same format as specified in the documentation for | |
152 | `calculator-operators', that you can use to bind additional calculator | |
153 | operators. It is probably not a good idea to modify this value with | |
154 | `customize' since it is too complex... | |
155 | ||
156 | Examples: | |
157 | ||
158 | * A very simple one, adding a postfix \"x-to-y\" convertion keys, using | |
159 | `t' as a prefix key: | |
160 | ||
161 | (setq calculator-user-operators | |
162 | '((\"tf\" cl-to-fr (+ 32 (/ (* X 9) 5)) 1) | |
163 | (\"tc\" fr-to-cl (/ (* (- X 32) 5) 9) 1) | |
164 | (\"tp\" kg-to-lb (/ X 0.453592) 1) | |
165 | (\"tk\" lb-to-kg (* X 0.453592) 1) | |
166 | (\"tF\" mt-to-ft (/ X 0.3048) 1) | |
167 | (\"tM\" ft-to-mt (* X 0.3048) 1))) | |
168 | ||
169 | * Using a function-like form is very simple, X for an argument (Y the | |
170 | second in case of a binary operator), TX is a truncated version of X | |
171 | and F does a recursive call, Here is a [very inefficient] Fibonacci | |
172 | number calculation: | |
173 | ||
174 | (add-to-list 'calculator-user-operators | |
175 | '(\"F\" fib (if (<= TX 1) | |
176 | 1 | |
177 | (+ (F (- TX 1)) (F (- TX 2)))) 0)) | |
178 | ||
179 | Note that this will be either postfix or prefix, according to | |
180 | `calculator-unary-style'." | |
181 | :type '(repeat (list string symbol sexp integer integer)) | |
182 | :group 'calculator) | |
183 | ||
184 | ;;; Code: | |
185 | ||
186 | (defvar calculator-initial-operators | |
86f1e1ec GM |
187 | '(;; "+"/"-" have keybindings of themselves, not calculator-ops |
188 | ("=" = identity 1 -1) | |
d240a249 GM |
189 | (nobind "+" + + 2 4) |
190 | (nobind "-" - - 2 4) | |
191 | (nobind "+" + + -1 9) | |
192 | (nobind "-" - - -1 9) | |
86f1e1ec GM |
193 | ("(" \( identity -1 -1) |
194 | (")" \) identity +1 10) | |
d240a249 GM |
195 | ;; normal keys |
196 | ("|" or (logior TX TY) 2 2) | |
197 | ("#" xor (logxor TX TY) 2 2) | |
198 | ("&" and (logand TX TY) 2 3) | |
199 | ("*" * * 2 5) | |
200 | ("/" / / 2 5) | |
201 | ("\\" div (/ TX TY) 2 5) | |
202 | ("%" rem (% TX TY) 2 5) | |
203 | ("L" log log 2 6) | |
204 | ("S" sin (sin DX) x 6) | |
205 | ("C" cos (cos DX) x 6) | |
206 | ("T" tan (tan DX) x 6) | |
207 | ("IS" asin (D (asin X)) x 6) | |
208 | ("IC" acos (D (acos X)) x 6) | |
209 | ("IT" atan (D (atan X)) x 6) | |
210 | ("Q" sqrt sqrt x 7) | |
211 | ("^" ^ expt 2 7) | |
212 | ("!" ! calculator-fact x 7) | |
213 | (";" 1/ (/ 1 X) 1 7) | |
214 | ("_" - - 1 8) | |
215 | ("~" ~ (lognot TX) x 8) | |
216 | (">" repR calculator-repR 1 8) | |
217 | ("<" repL calculator-repL 1 8) | |
218 | ("v" avg (/ (apply '+ L) (length L)) 0 8) | |
219 | ("l" tot (apply '+ L) 0 8) | |
220 | ) | |
221 | "A list of initial operators. | |
222 | ||
223 | This is a list in the same format as `calculator-operators'. Whenever | |
224 | `calculator' starts, it looks at the value of this variable, and if it | |
225 | is not empty, its contents is prepended to `calculator-operators' and | |
226 | the appropriate key bindings are made. | |
227 | ||
228 | This variable is then reset to nil. Don't use this if you want to add | |
229 | user-defined operators, use `calculator-user-operators' instead.") | |
230 | ||
231 | (defvar calculator-operators nil | |
232 | "The calculator operators, each a list with: | |
233 | ||
234 | 1. The key that is bound to for this operation (usually a string); | |
235 | ||
236 | 2. The displayed symbol for this function; | |
237 | ||
238 | 3. The function symbol, or a form that uses the variables `X' and `Y', | |
239 | (if it is a binary operator), `TX' and `TY' (truncated integer | |
240 | versions), `DX' (converted to radians if degrees mode is on), `D' | |
241 | (function for converting radians to degrees if deg mode is on), `L' | |
242 | (list of saved values), `F' (function for recursive iteration calls) | |
243 | and evaluates to the function value - these variables are capital; | |
244 | ||
245 | 4. The function's arity, optional, one of: 2=binary, -1=prefix unary, | |
246 | +1=postfix unary, 0=a 0-arg operator func, non-number=postfix/prefix | |
247 | as determined by `calculator-unary-style' (the default); | |
248 | ||
249 | 5. The function's precedence - should be in the range of 1=lowest to | |
250 | 9=highest (optional, defaults to 1); | |
251 | ||
252 | It it possible have a unary prefix version of a binary operator if it | |
253 | comes later in this list. If the list begins with the symbol 'nobind, | |
254 | then no key binding will take place - this is only useful for predefined | |
255 | keys. | |
256 | ||
257 | Use `calculator-user-operators' to add operators to this list, see its | |
258 | documentation for an example.") | |
259 | ||
260 | (defvar calculator-stack nil | |
261 | "Stack contents - operations and operands.") | |
262 | ||
263 | (defvar calculator-curnum nil | |
264 | "Current number being entered (as a string).") | |
265 | ||
266 | (defvar calculator-stack-display nil | |
267 | "Cons of the stack and its string representation.") | |
268 | ||
269 | (defvar calculator-char-radix | |
270 | '((?D . nil) (?B . bin) (?O . oct) (?H . hex) (?X . hex)) | |
271 | "A table to convert input characters to corresponding radix symbols.") | |
272 | ||
273 | (defvar calculator-output-radix nil | |
274 | "The mode for display, one of: nil (decimal), 'bin, 'oct or 'hex.") | |
275 | ||
276 | (defvar calculator-input-radix nil | |
277 | "The mode for input, one of: nil (decimal), 'bin, 'oct or 'hex.") | |
278 | ||
279 | (defvar calculator-deg nil | |
280 | "Non-nil if trig functions operate on degrees instead of radians.") | |
281 | ||
282 | (defvar calculator-saved-list nil | |
283 | "A list of saved values collected.") | |
284 | ||
285 | (defvar calculator-saved-ptr 0 | |
286 | "The pointer to the current saved number.") | |
287 | ||
288 | (defvar calculator-add-saved nil | |
289 | "Bound to t when a value should be added to the saved-list.") | |
290 | ||
291 | (defvar calculator-display-fragile nil | |
292 | "When non-nil, we see something that the next digit should replace.") | |
293 | ||
294 | (defvar calculator-buffer nil | |
295 | "The current calculator buffer.") | |
296 | ||
d240a249 GM |
297 | (defvar calculator-last-opXY nil |
298 | "The last binary operation and its arguments. | |
299 | Used for repeating operations in calculator-repR/L.") | |
300 | ||
301 | (defvar calculator-registers ; use user-bindings first | |
302 | (append calculator-user-registers (list (cons ?e e) (cons ?p pi))) | |
303 | "The association list of calculator register values.") | |
304 | ||
305 | (defvar calculator-saved-global-map nil | |
306 | "Saved global key map.") | |
307 | ||
86f1e1ec GM |
308 | (defvar calculator-restart-other-mode nil |
309 | "Used to hack restarting with the mode electric mode changed.") | |
310 | ||
d240a249 GM |
311 | (defvar calculator-mode-map nil |
312 | "The calculator key map.") | |
313 | ||
314 | (or calculator-mode-map | |
86f1e1ec | 315 | (let ((map (make-sparse-keymap))) |
d240a249 GM |
316 | (suppress-keymap map t) |
317 | (define-key map "i" nil) | |
318 | (define-key map "o" nil) | |
86f1e1ec GM |
319 | (let ((p |
320 | '(("(" "[" "{") | |
321 | (")" "]" "}") | |
322 | (calculator-op-or-exp "+" "-" [kp-add] [kp-subtract]) | |
323 | (calculator-digit "0" "1" "2" "3" "4" "5" "6" "7" "8" | |
324 | "9" "a" "b" "c" "d" "f" | |
325 | [kp-0] [kp-1] [kp-2] [kp-3] [kp-4] | |
326 | [kp-5] [kp-6] [kp-7] [kp-8] [kp-9]) | |
327 | (calculator-op [kp-divide] [kp-multiply]) | |
328 | (calculator-decimal "." [kp-decimal]) | |
329 | (calculator-exp "e") | |
330 | (calculator-dec/deg-mode "D") | |
331 | (calculator-set-register "s") | |
332 | (calculator-get-register "g") | |
333 | (calculator-radix-mode "H" "X" "O" "B") | |
334 | (calculator-radix-input-mode "id" "ih" "ix" "io" "ib" | |
335 | "iD" "iH" "iX" "iO" "iB") | |
336 | (calculator-radix-output-mode "od" "oh" "ox" "oo" "ob" | |
337 | "oD" "oH" "oX" "oO" "oB") | |
338 | (calculator-saved-up [up] [?\C-p]) | |
339 | (calculator-saved-down [down] [?\C-n]) | |
340 | (calculator-quit "q" [?\C-g]) | |
341 | ("=" [enter] [linefeed] [kp-enter] | |
342 | [?\r] [?\n]) | |
343 | (calculator-save-on-list " " [space]) | |
344 | (calculator-clear-saved [?\C-c] [(control delete)]) | |
345 | (calculator-save-and-quit [(control return)] | |
346 | [(control kp-enter)]) | |
347 | (calculator-paste [insert] [(shift insert)]) | |
348 | (calculator-clear [delete] [?\C-?] [?\C-d]) | |
349 | (calculator-help [?h] [??] [f1] [help]) | |
350 | (calculator-copy [(control insert)]) | |
351 | (calculator-backspace [backspace]) | |
352 | ))) | |
d240a249 | 353 | (while p |
86f1e1ec GM |
354 | ;; reverse the keys so first defs come last - makes the more |
355 | ;; sensible bindings visible in the menu | |
356 | (let ((func (car (car p))) (keys (reverse (cdr (car p))))) | |
357 | (while keys | |
358 | (define-key map (car keys) func) | |
359 | (setq keys (cdr keys)))) | |
d240a249 GM |
360 | (setq p (cdr p)))) |
361 | (if calculator-bind-escape | |
362 | (progn (define-key map [?\e] 'calculator-quit) | |
363 | (define-key map [escape] 'calculator-quit)) | |
364 | (define-key map [?\e ?\e ?\e] 'calculator-quit)) | |
365 | ;; make C-h work in text-mode | |
366 | (or window-system (define-key map [?\C-h] 'calculator-backspace)) | |
86f1e1ec GM |
367 | ;; set up a menu |
368 | (if (and calculator-use-menu (not (boundp 'calculator-menu))) | |
369 | (let ((radix-selectors | |
370 | (mapcar (lambda (x) | |
371 | `([,(nth 0 x) | |
372 | (calculator-radix-mode ,(nth 2 x)) | |
373 | :style radio | |
374 | :keys ,(nth 2 x) | |
375 | :selected | |
376 | (and | |
377 | (eq calculator-input-radix ',(nth 1 x)) | |
378 | (eq calculator-output-radix ',(nth 1 x)))] | |
379 | [,(concat (nth 0 x) " Input") | |
380 | (calculator-radix-input-mode ,(nth 2 x)) | |
381 | :keys ,(concat "i" (downcase (nth 2 x))) | |
382 | :style radio | |
383 | :selected | |
384 | (eq calculator-input-radix ',(nth 1 x))] | |
385 | [,(concat (nth 0 x) " Output") | |
386 | (calculator-radix-output-mode ,(nth 2 x)) | |
387 | :keys ,(concat "o" (downcase (nth 2 x))) | |
388 | :style radio | |
389 | :selected | |
390 | (eq calculator-output-radix ',(nth 1 x))])) | |
391 | '(("Decimal" nil "D") | |
392 | ("Binary" bin "B") | |
393 | ("Octal" oct "O") | |
394 | ("Hexadecimal" hex "H")))) | |
395 | (op '(lambda (name key) | |
396 | `[,name (calculator-op ,key) :keys ,key]))) | |
397 | (easy-menu-define | |
398 | calculator-menu map "Calculator menu." | |
399 | `("Calculator" | |
400 | ["Help" | |
401 | (let ((last-command 'calculator-help)) (calculator-help)) | |
402 | :keys "?"] | |
403 | "---" | |
404 | ["Copy" calculator-copy] | |
405 | ["Paste" calculator-paste] | |
406 | "---" | |
407 | ["Electric mode" | |
408 | (progn (calculator-quit) | |
409 | (setq calculator-restart-other-mode t) | |
410 | (run-with-timer 0.1 nil '(lambda () (message nil))) | |
411 | ;; the message from the menu will be visible, | |
412 | ;; couldn't make it go away... | |
413 | (calculator)) | |
414 | :active (not calculator-electric-mode)] | |
415 | ["Normal mode" | |
416 | (progn (setq calculator-restart-other-mode t) | |
417 | (calculator-quit)) | |
418 | :active calculator-electric-mode] | |
419 | "---" | |
420 | ("Functions" | |
421 | ,(funcall op "Repeat-right" ">") | |
422 | ,(funcall op "Repeat-left" "<") | |
423 | "------General------" | |
424 | ,(funcall op "Reciprocal" ";") | |
425 | ,(funcall op "Log" "L") | |
426 | ,(funcall op "Square-root" "Q") | |
427 | ,(funcall op "Factorial" "!") | |
428 | "------Trigonometric------" | |
429 | ,(funcall op "Sinus" "S") | |
430 | ,(funcall op "Cosine" "C") | |
431 | ,(funcall op "Tangent" "T") | |
432 | ,(funcall op "Inv-Sinus" "IS") | |
433 | ,(funcall op "Inv-Cosine" "IC") | |
434 | ,(funcall op "Inv-Tangent" "IT") | |
435 | "------Bitwise------" | |
436 | ,(funcall op "Or" "|") | |
437 | ,(funcall op "Xor" "#") | |
438 | ,(funcall op "And" "&") | |
439 | ,(funcall op "Not" "~")) | |
440 | ("Saved List" | |
441 | ["Eval+Save" calculator-save-on-list] | |
442 | ["Prev number" calculator-saved-up] | |
443 | ["Next number" calculator-saved-down] | |
444 | ["Delete current" calculator-clear | |
445 | :active (and calculator-display-fragile | |
446 | calculator-saved-list | |
447 | (= (car calculator-stack) | |
448 | (nth calculator-saved-ptr | |
449 | calculator-saved-list)))] | |
450 | ["Delete all" calculator-clear-saved] | |
451 | "---" | |
452 | ,(funcall op "List-total" "l") | |
453 | ,(funcall op "List-average" "v")) | |
454 | ("Registers" | |
455 | ["Get register" calculator-get-register] | |
456 | ["Set register" calculator-set-register]) | |
457 | ("Modes" | |
458 | ["Radians" | |
459 | (progn | |
460 | (and (or calculator-input-radix calculator-output-radix) | |
461 | (calculator-radix-mode "D")) | |
462 | (and calculator-deg (calculator-dec/deg-mode))) | |
463 | :keys "D" | |
464 | :style radio | |
465 | :selected (not (or calculator-input-radix | |
466 | calculator-output-radix | |
467 | calculator-deg))] | |
468 | ["Degrees" | |
469 | (progn | |
470 | (and (or calculator-input-radix calculator-output-radix) | |
471 | (calculator-radix-mode "D")) | |
472 | (or calculator-deg (calculator-dec/deg-mode))) | |
473 | :keys "D" | |
474 | :style radio | |
475 | :selected (and calculator-deg | |
476 | (not (or calculator-input-radix | |
477 | calculator-output-radix)))] | |
478 | "---" | |
479 | ,@(mapcar 'car radix-selectors) | |
480 | ("Seperate I/O" | |
481 | ,@(mapcar (lambda (x) (nth 1 x)) radix-selectors) | |
482 | "---" | |
483 | ,@(mapcar (lambda (x) (nth 2 x)) radix-selectors))) | |
484 | "---" | |
485 | ["Copy+Quit" calculator-save-and-quit] | |
486 | ["Quit" calculator-quit])))) | |
d240a249 GM |
487 | (setq calculator-mode-map map))) |
488 | ||
489 | (defun calculator-mode () | |
490 | "A simple pocket calculator in Emacs. | |
491 | ||
492 | This calculator is used in the same way as other popular calculators | |
493 | like xcalc or calc.exe - but using an Emacs interface. | |
494 | ||
495 | Expressions are entered using normal infix notation, parens are used as | |
496 | normal. Unary functions are usually postfix, but some depends on the | |
497 | value of `calculator-unary-style' (if the style for an operator below is | |
498 | specified, then it is fixed, otherwise it depends on this variable). | |
499 | `+' and `-' can be used as either binary operators or prefix unary | |
500 | operators. Numbers can be entered with exponential notation using `e', | |
501 | except when using a non-decimal radix mode for input (in this case `e' | |
502 | will be the hexadecimal digit). | |
503 | ||
504 | Here are the editing keys: | |
505 | * `RET' `=' evaluate the current expression | |
506 | * `C-insert' copy the whole current expression to the `kill-ring' | |
86f1e1ec | 507 | * `C-return' evaluate, save result the `kill-ring' and exit |
d240a249 GM |
508 | * `insert' paste a number if the one was copied (normally) |
509 | * `delete' `C-d' clear last argument or whole expression (hit twice) | |
510 | * `backspace' delete a digit or a previous expression element | |
511 | * `h' `?' pop-up a quick reference help | |
512 | * `ESC' `q' exit (`ESC' can be used if `calculator-bind-escape' is | |
513 | non-nil, otherwise use three consecutive `ESC's) | |
514 | ||
515 | These operators are pre-defined: | |
516 | * `+' `-' `*' `/' the common binary operators | |
517 | * `\\' `%' integer division and reminder | |
518 | * `_' `;' postfix unary negation and reciprocal | |
519 | * `^' `L' binary operators for x^y and log(x) in base y | |
520 | * `Q' `!' unary square root and factorial | |
521 | * `S' `C' `T' unary trigonometric operators - sin, cos and tan | |
522 | * `|' `#' `&' `~' bitwise operators - or, xor, and, not | |
523 | ||
524 | The trigonometric functions can be inverted if prefixed with an `I', see | |
525 | below for the way to use degrees instead of the default radians. | |
526 | ||
527 | Two special postfix unary operators are `>' and `<': whenever a binary | |
528 | operator is performed, it is remembered along with its arguments; then | |
529 | `>' (`<') will apply the same operator with the same right (left) | |
530 | argument. | |
531 | ||
532 | hex/oct/bin modes can be set for input and for display separately. | |
533 | Another toggle-able mode is for using degrees instead of radians for | |
534 | trigonometric functions. | |
535 | The keys to switch modes are (`X' is shortcut for `H'): | |
536 | * `D' switch to all-decimal mode, or toggle degrees/radians | |
537 | * `B' `O' `H' `X' binary/octal/hexadecimal modes for input & display | |
538 | * `i' `o' followed by one of `D' `B' `O' `H' `X' (case | |
539 | insensitive) sets only the input or display radix mode | |
540 | The prompt indicates the current modes: | |
541 | * \"D=\": degrees mode; | |
542 | * \"?=\": (? is B/O/H) this is the radix for both input and output; | |
543 | * \"=?\": (? is B/O/H) the display radix (when input is decimal); | |
544 | * \"??\": (? is D/B/O/H) 1st char for input radix, 2nd for display. | |
545 | ||
546 | Values can be saved for future reference in either a list of saved | |
547 | values, or in registers. | |
548 | ||
549 | The list of saved values is useful for statistics operations on some | |
550 | collected data. It is possible to navigate in this list, and if the | |
551 | value shown is the current one on the list, an indication is displayed | |
552 | as \"[N]\" if this is the last number and there are N numbers, or | |
553 | \"[M/N]\" if the M-th value is shown. | |
554 | * `SPC' evaluate the current value as usual, but also adds | |
555 | the result to the list of saved values | |
556 | * `l' `v' computes total / average of saved values | |
557 | * `up' `C-p' browse to the previous value in the list | |
558 | * `down' `C-n' browse to the next value in the list | |
559 | * `delete' `C-d' remove current value from the list (if it is on it) | |
560 | * `C-delete' `C-c' delete the whole list | |
561 | ||
562 | Registers are variable-like place-holders for values: | |
563 | * `s' followed by a character attach the current value to that character | |
564 | * `g' followed by a character fetches the attached value | |
565 | ||
566 | There are many variables that can be used to customize the calculator. | |
567 | Some interesting customization variables are: | |
568 | * `calculator-electric-mode' use only the echo-area electrically. | |
569 | * `calculator-unary-style' set most unary ops to pre/postfix style. | |
570 | * `calculator-user-registers' to define user-preset registers. | |
571 | * `calculator-user-operators' to add user-defined operators. | |
572 | See the documentation for these variables, and \"calculator.el\" for | |
573 | more information. | |
574 | ||
575 | \\{calculator-mode-map}" | |
576 | (interactive) | |
577 | (kill-all-local-variables) | |
578 | (setq major-mode 'calculator-mode) | |
579 | (setq mode-name "Calculator") | |
580 | (use-local-map calculator-mode-map) | |
581 | (run-hooks 'calculator-mode-hook)) | |
582 | ||
583 | ;;;###autoload | |
584 | (defun calculator () | |
585 | "Run the pocket calculator. | |
586 | See the documentation for `calculator-mode' for more information." | |
587 | (interactive) | |
86f1e1ec GM |
588 | (if calculator-restart-other-mode |
589 | (setq calculator-electric-mode (not calculator-electric-mode))) | |
d240a249 GM |
590 | (if calculator-initial-operators |
591 | (progn (calculator-add-operators calculator-initial-operators) | |
592 | (setq calculator-initial-operators nil) | |
593 | ;; don't change this since it is a customization variable, | |
594 | ;; its set function will add any new operators. | |
595 | (calculator-add-operators calculator-user-operators))) | |
d240a249 GM |
596 | (if calculator-electric-mode |
597 | (save-window-excursion | |
86f1e1ec | 598 | (progn (require 'electric) (message nil)) ; hide load message |
d240a249 GM |
599 | (let (old-g-map old-l-map (echo-keystrokes 0) |
600 | (garbage-collection-messages nil)) ; no gc msg when electric | |
d240a249 GM |
601 | ;; strange behavior in FSF: doesn't always select correct |
602 | ;; minibuffer. I have no idea how to fix this | |
603 | (setq calculator-buffer (window-buffer (minibuffer-window))) | |
604 | (select-window (minibuffer-window)) | |
605 | (calculator-reset) | |
606 | (calculator-update-display) | |
607 | (setq old-l-map (current-local-map)) | |
608 | (setq old-g-map (current-global-map)) | |
609 | (setq calculator-saved-global-map (current-global-map)) | |
86f1e1ec | 610 | (use-local-map nil) |
d240a249 GM |
611 | (use-global-map calculator-mode-map) |
612 | (unwind-protect | |
613 | (catch 'calculator-done | |
614 | (Electric-command-loop | |
615 | 'calculator-done | |
616 | ;; can't use 'noprompt, bug in electric.el | |
617 | '(lambda () 'noprompt) | |
618 | nil | |
86f1e1ec | 619 | (lambda (x y) (calculator-update-display)))) |
d240a249 GM |
620 | (and calculator-buffer |
621 | (catch 'calculator-done (calculator-quit))) | |
622 | (use-local-map old-l-map) | |
623 | (use-global-map old-g-map)))) | |
86f1e1ec GM |
624 | (progn |
625 | (setq calculator-buffer | |
626 | (or (and (bufferp calculator-buffer) | |
627 | (buffer-live-p calculator-buffer) | |
628 | calculator-buffer) | |
629 | (if calculator-electric-mode | |
630 | (get-buffer-create "*calculator*") | |
631 | (let ((split-window-keep-point nil) | |
632 | (window-min-height 2)) | |
633 | (select-window | |
634 | (split-window-vertically (- (window-height) 2))) | |
635 | (switch-to-buffer | |
636 | (get-buffer-create "*calculator*")))))) | |
637 | (set-buffer calculator-buffer) | |
638 | (calculator-mode) | |
639 | (setq buffer-read-only t) | |
640 | (calculator-reset) | |
641 | (message "Hit `?' For a quick help screen."))) | |
642 | (if (and calculator-restart-other-mode calculator-electric-mode) | |
643 | (calculator))) | |
d240a249 GM |
644 | |
645 | (defun calculator-op-arity (op) | |
646 | "Return OP's arity, 2, +1 or -1." | |
647 | (let ((arity (or (nth 3 op) 'x))) | |
648 | (if (numberp arity) | |
649 | arity | |
650 | (if (eq calculator-unary-style 'postfix) +1 -1)))) | |
651 | ||
652 | (defun calculator-op-prec (op) | |
653 | "Return OP's precedence for reducing when inserting into the stack. | |
654 | Defaults to 1." | |
655 | (or (nth 4 op) 1)) | |
656 | ||
657 | (defun calculator-add-operators (more-ops) | |
658 | "This function handles operator addition. | |
659 | Adds MORE-OPS to `calculator-operator', called initially to handle | |
660 | `calculator-initial-operators' and `calculator-user-operators'." | |
661 | (let ((added-ops nil)) | |
662 | (while more-ops | |
663 | (or (eq (car (car more-ops)) 'nobind) | |
664 | (let ((i -1) (key (car (car more-ops)))) | |
665 | ;; make sure the key is undefined, so it's easy to define | |
666 | ;; prefix keys | |
667 | (while (< (setq i (1+ i)) (length key)) | |
668 | (or (keymapp | |
669 | (lookup-key calculator-mode-map | |
670 | (substring key 0 (1+ i)))) | |
671 | (progn | |
672 | (define-key | |
673 | calculator-mode-map (substring key 0 (1+ i)) nil) | |
674 | (setq i (length key))))) | |
675 | (define-key calculator-mode-map key 'calculator-op))) | |
676 | (setq added-ops (cons (if (eq (car (car more-ops)) 'nobind) | |
677 | (cdr (car more-ops)) | |
678 | (car more-ops)) | |
679 | added-ops)) | |
680 | (setq more-ops (cdr more-ops))) | |
681 | ;; added-ops come first, but in correct order | |
682 | (setq calculator-operators | |
683 | (append (nreverse added-ops) calculator-operators)))) | |
684 | ||
685 | (defun calculator-reset () | |
686 | "Reset calculator variables." | |
86f1e1ec GM |
687 | (or calculator-restart-other-mode |
688 | (setq calculator-stack nil | |
689 | calculator-curnum nil | |
690 | calculator-stack-display nil | |
691 | calculator-display-fragile nil)) | |
692 | (setq calculator-restart-other-mode nil) | |
d240a249 GM |
693 | (calculator-update-display)) |
694 | ||
695 | (defun calculator-get-prompt () | |
696 | "Return a string to display. | |
697 | The string is set not to exceed the screen width." | |
698 | (let* ((calculator-prompt | |
699 | (format calculator-prompt | |
700 | (cond | |
701 | ((or calculator-output-radix calculator-input-radix) | |
702 | (if (eq calculator-output-radix | |
703 | calculator-input-radix) | |
704 | (concat | |
705 | (char-to-string | |
706 | (car (rassq calculator-output-radix | |
707 | calculator-char-radix))) | |
708 | "=") | |
709 | (concat | |
710 | (if calculator-input-radix | |
711 | (char-to-string | |
712 | (car (rassq calculator-input-radix | |
713 | calculator-char-radix))) | |
714 | "=") | |
715 | (char-to-string | |
716 | (car (rassq calculator-output-radix | |
717 | calculator-char-radix)))))) | |
718 | (calculator-deg "D=") | |
719 | (t "==")))) | |
720 | (prompt | |
721 | (concat calculator-prompt | |
722 | (cdr calculator-stack-display) | |
723 | (cond (calculator-curnum | |
724 | ;; number being typed | |
725 | (concat calculator-curnum "_")) | |
726 | ((and (= 1 (length calculator-stack)) | |
727 | calculator-display-fragile) | |
728 | ;; only the result is shown, next number will | |
729 | ;; restart | |
730 | nil) | |
731 | (t | |
732 | ;; waiting for a number or an operator | |
733 | "?")))) | |
734 | (trim (- (length prompt) (1- (window-width))))) | |
735 | (if (<= trim 0) | |
736 | prompt | |
737 | (concat calculator-prompt | |
738 | (substring prompt (+ trim (length calculator-prompt))))))) | |
739 | ||
740 | (defun calculator-curnum-value () | |
741 | "Get the numeric value of the displayed number string as a float." | |
742 | (if calculator-input-radix | |
743 | (let ((radix | |
744 | (cdr (assq calculator-input-radix | |
745 | '((bin . 2) (oct . 8) (hex . 16))))) | |
746 | (i -1) (value 0)) | |
747 | ;; assume valid input (upcased & characters in range) | |
748 | (while (< (setq i (1+ i)) (length calculator-curnum)) | |
749 | (setq value | |
750 | (+ (let ((ch (aref calculator-curnum i))) | |
751 | (- ch (if (<= ch ?9) ?0 (- ?A 10)))) | |
752 | (* radix value)))) | |
753 | value) | |
754 | (car | |
755 | (read-from-string | |
756 | (cond | |
757 | ((equal "." calculator-curnum) | |
758 | "0.0") | |
759 | ((string-match "[eE][+-]?$" calculator-curnum) | |
760 | (concat calculator-curnum "0")) | |
761 | ((string-match "\\.[0-9]\\|[eE]" calculator-curnum) | |
762 | calculator-curnum) | |
763 | ((string-match "\\." calculator-curnum) | |
764 | ;; do this because Emacs reads "23." as an integer. | |
765 | (concat calculator-curnum "0")) | |
766 | ((stringp calculator-curnum) | |
767 | (concat calculator-curnum ".0")) | |
768 | (t "0.0")))))) | |
769 | ||
770 | (defun calculator-num-to-string (num) | |
771 | "Convert NUM to a displayable string." | |
772 | (cond | |
773 | ((and (numberp num) calculator-output-radix) | |
774 | ;; print with radix - for binary I convert the octal number | |
775 | (let ((str (format (if (eq calculator-output-radix 'hex) "%x" "%o") | |
776 | (calculator-truncate | |
777 | (if calculator-2s-complement num (abs num)))))) | |
778 | (if (eq calculator-output-radix 'bin) | |
779 | (let ((i -1) (s "")) | |
780 | (while (< (setq i (1+ i)) (length str)) | |
781 | (setq s | |
782 | (concat s | |
783 | (cdr (assq (aref str i) | |
784 | '((?0 . "000") (?1 . "001") | |
785 | (?2 . "010") (?3 . "011") | |
786 | (?4 . "100") (?5 . "101") | |
787 | (?6 . "110") (?7 . "111"))))))) | |
788 | (string-match "^0*\\(.+\\)" s) | |
789 | (setq str (match-string 1 s)))) | |
790 | (upcase | |
791 | (if (and (not calculator-2s-complement) (< num 0)) | |
792 | (concat "-" str) | |
793 | str)))) | |
794 | ((and (numberp num) | |
795 | ;; is this a normal-range number? | |
796 | (>= (abs num) calculator-number-exp-llimit) | |
797 | (< (abs num) calculator-number-exp-ulimit)) | |
798 | (let ((str (format calculator-number-format num))) | |
799 | (cond | |
800 | ((and calculator-show-integers (string-match "\\.?0+$" str)) | |
801 | ;; remove all redundant zeros | |
802 | (substring str 0 (match-beginning 0))) | |
803 | ((and (not calculator-show-integers) | |
804 | (string-match "\\..\\(.*[^0]\\)?\\(0+\\)$" str)) | |
805 | ;; remove zeros, except for first after the "." | |
806 | (substring str 0 (match-beginning 2))) | |
807 | (t str)))) | |
808 | ((numberp num) (format calculator-number-exp-format num)) | |
809 | (t (prin1-to-string (nth 1 num) t)))) | |
810 | ||
811 | (defun calculator-update-display (&optional force) | |
812 | "Update the display. | |
813 | If optional argument FORCE is non-nil, don't use the cached string." | |
814 | (set-buffer calculator-buffer) | |
815 | ;; update calculator-stack-display | |
816 | (if (or force | |
817 | (not (eq (car calculator-stack-display) calculator-stack))) | |
818 | (setq calculator-stack-display | |
819 | (cons calculator-stack | |
820 | (if calculator-stack | |
821 | (concat | |
822 | (mapconcat 'calculator-num-to-string | |
823 | (reverse calculator-stack) | |
824 | " ") | |
825 | " " | |
826 | (and calculator-display-fragile | |
827 | calculator-saved-list | |
828 | (= (car calculator-stack) | |
829 | (nth calculator-saved-ptr | |
830 | calculator-saved-list)) | |
831 | (if (= 0 calculator-saved-ptr) | |
832 | (format "[%s]" (length calculator-saved-list)) | |
833 | (format "[%s/%s]" | |
834 | (- (length calculator-saved-list) | |
835 | calculator-saved-ptr) | |
836 | (length calculator-saved-list))))) | |
837 | "")))) | |
838 | (let ((inhibit-read-only t)) | |
839 | (erase-buffer) | |
840 | (insert (calculator-get-prompt))) | |
841 | (set-buffer-modified-p nil) | |
842 | (if calculator-display-fragile | |
843 | (goto-char (1+ (length calculator-prompt))) | |
844 | (goto-char (1- (point))))) | |
845 | ||
846 | (defun calculator-reduce-stack (prec) | |
847 | "Reduce the stack using top operator. | |
848 | PREC is a precedence - reduce everything with higher precedence." | |
849 | (while | |
850 | (cond | |
851 | ((and (cdr (cdr calculator-stack)) ; have three values | |
852 | (consp (nth 0 calculator-stack)) ; two operators & num | |
853 | (numberp (nth 1 calculator-stack)) | |
854 | (consp (nth 2 calculator-stack)) | |
855 | (eq '\) (nth 1 (nth 0 calculator-stack))) | |
856 | (eq '\( (nth 1 (nth 2 calculator-stack)))) | |
857 | ;; reduce "... ( x )" --> "... x" | |
858 | (setq calculator-stack | |
859 | (cons (nth 1 calculator-stack) | |
860 | (nthcdr 3 calculator-stack))) | |
861 | ;; another iteration | |
862 | t) | |
863 | ((and (cdr (cdr calculator-stack)) ; have three values | |
864 | (numberp (nth 0 calculator-stack)) ; two nums & operator | |
865 | (consp (nth 1 calculator-stack)) | |
866 | (numberp (nth 2 calculator-stack)) | |
867 | (= 2 (calculator-op-arity ; binary operator | |
868 | (nth 1 calculator-stack))) | |
869 | (<= prec ; with higher prec. | |
870 | (calculator-op-prec (nth 1 calculator-stack)))) | |
871 | ;; reduce "... x op y" --> "... r", r is the result | |
872 | (setq calculator-stack | |
873 | (cons (calculator-funcall | |
874 | (nth 2 (nth 1 calculator-stack)) | |
875 | (nth 2 calculator-stack) | |
876 | (nth 0 calculator-stack)) | |
877 | (nthcdr 3 calculator-stack))) | |
878 | ;; another iteration | |
879 | t) | |
880 | ((and (>= (length calculator-stack) 2) ; have two values | |
881 | (numberp (nth 0 calculator-stack)) ; number & operator | |
882 | (consp (nth 1 calculator-stack)) | |
883 | (= -1 (calculator-op-arity ; prefix-unary op | |
884 | (nth 1 calculator-stack))) | |
885 | (<= prec ; with higher prec. | |
886 | (calculator-op-prec (nth 1 calculator-stack)))) | |
887 | ;; reduce "... op x" --> "... r" for prefix op | |
888 | (setq calculator-stack | |
889 | (cons (calculator-funcall | |
890 | (nth 2 (nth 1 calculator-stack)) | |
891 | (nth 0 calculator-stack)) | |
892 | (nthcdr 2 calculator-stack))) | |
893 | ;; another iteration | |
894 | t) | |
895 | ((and (cdr calculator-stack) ; have two values | |
896 | (consp (nth 0 calculator-stack)) ; operator & number | |
897 | (numberp (nth 1 calculator-stack)) | |
898 | (= +1 (calculator-op-arity ; postfix-unary op | |
899 | (nth 0 calculator-stack))) | |
900 | (<= prec ; with higher prec. | |
901 | (calculator-op-prec (nth 0 calculator-stack)))) | |
902 | ;; reduce "... x op" --> "... r" for postfix op | |
903 | (setq calculator-stack | |
904 | (cons (calculator-funcall | |
905 | (nth 2 (nth 0 calculator-stack)) | |
906 | (nth 1 calculator-stack)) | |
907 | (nthcdr 2 calculator-stack))) | |
908 | ;; another iteration | |
909 | t) | |
910 | ((and calculator-stack ; have one value | |
911 | (consp (nth 0 calculator-stack)) ; an operator | |
912 | (= 0 (calculator-op-arity ; 0-ary op | |
913 | (nth 0 calculator-stack)))) | |
914 | ;; reduce "... op" --> "... r" for 0-ary op | |
915 | (setq calculator-stack | |
916 | (cons (calculator-funcall | |
917 | (nth 2 (nth 0 calculator-stack))) | |
918 | (nthcdr 1 calculator-stack))) | |
919 | ;; another iteration | |
920 | t) | |
921 | ((and (cdr calculator-stack) ; have two values | |
922 | (numberp (nth 0 calculator-stack)) ; both numbers | |
923 | (numberp (nth 1 calculator-stack))) | |
924 | ;; get rid of redundant numbers: | |
925 | ;; reduce "... y x" --> "... x" | |
926 | ;; needed for 0-ary ops that puts more values | |
927 | (setcdr calculator-stack (cdr (cdr calculator-stack)))) | |
928 | (t ;; no more iterations | |
929 | nil)))) | |
930 | ||
931 | (eval-when-compile ; silence the compiler | |
932 | (or (fboundp 'event-key) | |
933 | (defun event-key (&rest _) nil)) | |
934 | (or (fboundp 'key-press-event-p) | |
935 | (defun key-press-event-p (&rest _) nil))) | |
936 | ||
86f1e1ec GM |
937 | (defun calculator-last-input (&optional keys) |
938 | "Last char (or event or event sequence) that was read. | |
939 | Optional string argument KEYS will force using it as the keys entered." | |
940 | (let ((inp (or keys (this-command-keys)))) | |
d240a249 GM |
941 | (if (or (stringp inp) (not (arrayp inp))) |
942 | inp | |
943 | ;; this translates kp-x to x and [tries to] create a string to | |
944 | ;; lookup operators | |
945 | (let* ((i -1) (converted-str (make-string (length inp) ? )) k) | |
946 | ;; converts an array to a string the ops lookup with keypad | |
947 | ;; input | |
948 | (while (< (setq i (1+ i)) (length inp)) | |
949 | (setq k (aref inp i)) | |
950 | ;; if Emacs will someday have a event-key, then this would | |
951 | ;; probably be modified anyway | |
952 | (and (fboundp 'event-key) (key-press-event-p k) | |
953 | (setq k (event-key k))) | |
954 | ;; assume all symbols are translatable with an ascii-character | |
955 | (and (symbolp k) | |
956 | (setq k (or (get k 'ascii-character) ? ))) | |
957 | (aset converted-str i k)) | |
958 | converted-str)))) | |
959 | ||
960 | (defun calculator-clear-fragile (&optional op) | |
961 | "Clear the fragile flag if it was set, then maybe reset all. | |
962 | OP is the operator (if any) that caused this call." | |
963 | (if (and calculator-display-fragile | |
964 | (or (not op) | |
965 | (= -1 (calculator-op-arity op)) | |
966 | (= 0 (calculator-op-arity op)))) | |
967 | ;; reset if last calc finished, and now get a num or prefix or 0-ary | |
968 | ;; op. | |
969 | (calculator-reset)) | |
970 | (setq calculator-display-fragile nil)) | |
971 | ||
972 | (defun calculator-digit () | |
973 | "Enter a single digit." | |
974 | (interactive) | |
975 | (let ((inp (aref (calculator-last-input) 0))) | |
976 | (if (and (or calculator-display-fragile | |
977 | (not (numberp (car calculator-stack)))) | |
978 | (cond | |
979 | ((not calculator-input-radix) (<= inp ?9)) | |
980 | ((eq calculator-input-radix 'bin) (<= inp ?1)) | |
981 | ((eq calculator-input-radix 'oct) (<= inp ?7)) | |
982 | (t t))) | |
983 | ;; enter digit if starting a new computation or have an op on the | |
984 | ;; stack. | |
985 | (progn | |
986 | (calculator-clear-fragile) | |
987 | (let ((digit (upcase (char-to-string inp)))) | |
988 | (if (equal calculator-curnum "0") | |
989 | (setq calculator-curnum nil)) | |
990 | (setq calculator-curnum | |
991 | (concat (or calculator-curnum "") digit))) | |
992 | (calculator-update-display))))) | |
993 | ||
994 | (defun calculator-decimal () | |
995 | "Enter a decimal period." | |
996 | (interactive) | |
997 | (if (and (not calculator-input-radix) | |
998 | (or calculator-display-fragile | |
999 | (not (numberp (car calculator-stack)))) | |
1000 | (not (and calculator-curnum | |
1001 | (string-match "[.eE]" calculator-curnum)))) | |
1002 | ;; enter the period on the same condition as a digit, only if no | |
1003 | ;; period or exponent entered yet. | |
1004 | (progn | |
1005 | (calculator-clear-fragile) | |
1006 | (setq calculator-curnum (concat (or calculator-curnum "0") ".")) | |
1007 | (calculator-update-display)))) | |
1008 | ||
1009 | (defun calculator-exp () | |
1010 | "Enter an `E' exponent character, or a digit in hex input mode." | |
1011 | (interactive) | |
1012 | (if calculator-input-radix | |
1013 | (calculator-digit) | |
1014 | (if (and (or calculator-display-fragile | |
1015 | (not (numberp (car calculator-stack)))) | |
1016 | (not (and calculator-curnum | |
1017 | (string-match "[eE]" calculator-curnum)))) | |
1018 | ;; same condition as above, also no E so far. | |
1019 | (progn | |
1020 | (calculator-clear-fragile) | |
1021 | (setq calculator-curnum (concat (or calculator-curnum "1") "e")) | |
1022 | (calculator-update-display))))) | |
1023 | ||
86f1e1ec GM |
1024 | (defun calculator-op (&optional keys) |
1025 | "Enter an operator on the stack, doing all necessary reductions. | |
1026 | Optional string argument KEYS will force using it as the keys entered." | |
d240a249 | 1027 | (interactive) |
86f1e1ec | 1028 | (let* ((last-inp (calculator-last-input keys)) |
d240a249 GM |
1029 | (op (assoc last-inp calculator-operators))) |
1030 | (calculator-clear-fragile op) | |
1031 | (if (and calculator-curnum (/= (calculator-op-arity op) 0)) | |
1032 | (setq calculator-stack | |
1033 | (cons (calculator-curnum-value) calculator-stack))) | |
1034 | (setq calculator-curnum nil) | |
1035 | (if (and (= 2 (calculator-op-arity op)) | |
1036 | (not (and calculator-stack | |
1037 | (numberp (nth 0 calculator-stack))))) | |
1038 | ;; we have a binary operator but no number - search for a prefix | |
1039 | ;; version | |
1040 | (let ((rest-ops calculator-operators)) | |
1041 | (while (not (equal last-inp (car (car rest-ops)))) | |
1042 | (setq rest-ops (cdr rest-ops))) | |
1043 | (setq op (assoc last-inp (cdr rest-ops))) | |
1044 | (if (not (and op (= -1 (calculator-op-arity op)))) | |
1045 | (error "Binary operator without a first operand")))) | |
1046 | (calculator-reduce-stack | |
1047 | (cond ((eq (nth 1 op) '\() 10) | |
1048 | ((eq (nth 1 op) '\)) 0) | |
1049 | (t (calculator-op-prec op)))) | |
1050 | (if (or (and (= -1 (calculator-op-arity op)) | |
1051 | (numberp (car calculator-stack))) | |
1052 | (and (/= (calculator-op-arity op) -1) | |
1053 | (/= (calculator-op-arity op) 0) | |
1054 | (not (numberp (car calculator-stack))))) | |
1055 | (error "Unterminated expression")) | |
1056 | (setq calculator-stack (cons op calculator-stack)) | |
1057 | (calculator-reduce-stack (calculator-op-prec op)) | |
1058 | (and (= (length calculator-stack) 1) | |
1059 | (numberp (nth 0 calculator-stack)) | |
1060 | ;; the display is fragile if it contains only one number | |
1061 | (setq calculator-display-fragile t) | |
1062 | ;; add number to the saved-list | |
1063 | calculator-add-saved | |
1064 | (if (= 0 calculator-saved-ptr) | |
1065 | (setq calculator-saved-list | |
1066 | (cons (car calculator-stack) calculator-saved-list)) | |
1067 | (let ((p (nthcdr (1- calculator-saved-ptr) | |
1068 | calculator-saved-list))) | |
1069 | (setcdr p (cons (car calculator-stack) (cdr p)))))) | |
1070 | (calculator-update-display))) | |
1071 | ||
1072 | (defun calculator-op-or-exp () | |
1073 | "Either enter an operator or a digit. | |
1074 | Used with +/- for entering them as digits in numbers like 1e-3." | |
1075 | (interactive) | |
1076 | (if (and (not calculator-display-fragile) | |
1077 | calculator-curnum | |
1078 | (string-match "[eE]$" calculator-curnum)) | |
1079 | (calculator-digit) | |
1080 | (calculator-op))) | |
1081 | ||
1082 | (defun calculator-dec/deg-mode () | |
1083 | "Set decimal mode for display & input, if decimal, toggle deg mode." | |
1084 | (interactive) | |
1085 | (if calculator-curnum | |
1086 | (setq calculator-stack | |
1087 | (cons (calculator-curnum-value) calculator-stack))) | |
1088 | (setq calculator-curnum nil) | |
1089 | (if (or calculator-input-radix calculator-output-radix) | |
1090 | (progn (setq calculator-input-radix nil) | |
1091 | (setq calculator-output-radix nil)) | |
1092 | ;; already decimal - toggle degrees mode | |
1093 | (setq calculator-deg (not calculator-deg))) | |
1094 | (calculator-update-display t)) | |
1095 | ||
86f1e1ec GM |
1096 | (defun calculator-radix-mode (&optional keys) |
1097 | "Set input and display radix modes. | |
1098 | Optional string argument KEYS will force using it as the keys entered." | |
d240a249 | 1099 | (interactive) |
86f1e1ec GM |
1100 | (calculator-radix-input-mode keys) |
1101 | (calculator-radix-output-mode keys)) | |
d240a249 | 1102 | |
86f1e1ec GM |
1103 | (defun calculator-radix-input-mode (&optional keys) |
1104 | "Set input radix modes. | |
1105 | Optional string argument KEYS will force using it as the keys entered." | |
d240a249 GM |
1106 | (interactive) |
1107 | (if calculator-curnum | |
1108 | (setq calculator-stack | |
1109 | (cons (calculator-curnum-value) calculator-stack))) | |
1110 | (setq calculator-curnum nil) | |
1111 | (setq calculator-input-radix | |
86f1e1ec | 1112 | (let ((inp (calculator-last-input keys))) |
d240a249 GM |
1113 | (cdr (assq (upcase (aref inp (1- (length inp)))) |
1114 | calculator-char-radix)))) | |
1115 | (calculator-update-display)) | |
1116 | ||
86f1e1ec GM |
1117 | (defun calculator-radix-output-mode (&optional keys) |
1118 | "Set display radix modes. | |
1119 | Optional string argument KEYS will force using it as the keys entered." | |
d240a249 GM |
1120 | (interactive) |
1121 | (if calculator-curnum | |
1122 | (setq calculator-stack | |
1123 | (cons (calculator-curnum-value) calculator-stack))) | |
1124 | (setq calculator-curnum nil) | |
1125 | (setq calculator-output-radix | |
86f1e1ec | 1126 | (let ((inp (calculator-last-input keys))) |
d240a249 GM |
1127 | (cdr (assq (upcase (aref inp (1- (length inp)))) |
1128 | calculator-char-radix)))) | |
1129 | (calculator-update-display t)) | |
1130 | ||
1131 | (defun calculator-save-on-list () | |
1132 | "Evaluate current expression, put result on the saved values list." | |
1133 | (interactive) | |
1134 | (let ((calculator-add-saved t)) ; marks the result to be added | |
1135 | (calculator-enter))) | |
1136 | ||
1137 | (defun calculator-clear-saved () | |
1138 | "Clear the list of saved values in `calculator-saved-list'." | |
1139 | (interactive) | |
1140 | (setq calculator-saved-list nil) | |
1141 | (calculator-update-display t)) | |
1142 | ||
1143 | (defun calculator-saved-move (n) | |
1144 | "Go N elements up the list of saved values." | |
1145 | (interactive) | |
1146 | (and calculator-saved-list | |
1147 | (or (null calculator-stack) calculator-display-fragile) | |
1148 | (progn | |
1149 | (setq calculator-saved-ptr | |
1150 | (max (min (+ n calculator-saved-ptr) | |
1151 | (length calculator-saved-list)) | |
1152 | 0)) | |
1153 | (if (nth calculator-saved-ptr calculator-saved-list) | |
1154 | (setq calculator-stack | |
1155 | (list (nth calculator-saved-ptr calculator-saved-list)) | |
1156 | calculator-display-fragile t) | |
86f1e1ec GM |
1157 | (calculator-reset)) |
1158 | (calculator-update-display)))) | |
d240a249 GM |
1159 | |
1160 | (defun calculator-saved-up () | |
1161 | "Go up the list of saved values." | |
1162 | (interactive) | |
1163 | (calculator-saved-move +1)) | |
1164 | ||
1165 | (defun calculator-saved-down () | |
1166 | "Go down the list of saved values." | |
1167 | (interactive) | |
1168 | (calculator-saved-move -1)) | |
1169 | ||
1170 | (defun calculator-open-paren () | |
1171 | "Equivalents of `(' use this." | |
1172 | (interactive) | |
86f1e1ec | 1173 | (calculator-op "(")) |
d240a249 GM |
1174 | |
1175 | (defun calculator-close-paren () | |
1176 | "Equivalents of `)' use this." | |
1177 | (interactive) | |
86f1e1ec | 1178 | (calculator-op ")")) |
d240a249 GM |
1179 | |
1180 | (defun calculator-enter () | |
86f1e1ec | 1181 | "Evaluate current expression." |
d240a249 | 1182 | (interactive) |
86f1e1ec | 1183 | (calculator-op "=")) |
d240a249 GM |
1184 | |
1185 | (defun calculator-backspace () | |
1186 | "Backward delete a single digit or a stack element." | |
1187 | (interactive) | |
1188 | (if calculator-curnum | |
1189 | (setq calculator-curnum | |
1190 | (if (> (length calculator-curnum) 1) | |
1191 | (substring calculator-curnum | |
1192 | 0 (1- (length calculator-curnum))) | |
1193 | nil)) | |
1194 | (setq calculator-stack (cdr calculator-stack))) | |
1195 | (calculator-update-display)) | |
1196 | ||
1197 | (defun calculator-clear () | |
1198 | "Clear current number." | |
1199 | (interactive) | |
1200 | (setq calculator-curnum nil) | |
1201 | (cond | |
1202 | ;; if the current number is from the saved-list - remove it | |
1203 | ((and calculator-display-fragile | |
1204 | calculator-saved-list | |
1205 | (= (car calculator-stack) | |
1206 | (nth calculator-saved-ptr calculator-saved-list))) | |
1207 | (if (= 0 calculator-saved-ptr) | |
1208 | (setq calculator-saved-list (cdr calculator-saved-list)) | |
1209 | (let ((p (nthcdr (1- calculator-saved-ptr) | |
1210 | calculator-saved-list))) | |
1211 | (setcdr p (cdr (cdr p))) | |
1212 | (setq calculator-saved-ptr (1- calculator-saved-ptr)))) | |
1213 | (if calculator-saved-list | |
1214 | (setq calculator-stack | |
1215 | (list (nth calculator-saved-ptr calculator-saved-list))) | |
1216 | (calculator-reset))) | |
1217 | ;; reset if fragile or double clear | |
1218 | ((or calculator-display-fragile (eq last-command this-command)) | |
1219 | (calculator-reset))) | |
1220 | (calculator-update-display)) | |
1221 | ||
1222 | (defun calculator-copy () | |
1223 | "Copy current number to the `kill-ring'." | |
1224 | (interactive) | |
1225 | (calculator-enter) | |
1226 | ;; remove trailing .0 and spaces .0 | |
1227 | (let ((s (cdr calculator-stack-display))) | |
1228 | (if (string-match "^\\(.*[^ ]\\) *$" s) | |
1229 | (setq s (match-string 1 s))) | |
1230 | (kill-new s))) | |
1231 | ||
1232 | (defun calculator-set-register (reg) | |
1233 | "Set a register value for REG." | |
1234 | (interactive "cRegister to store into: ") | |
1235 | (let* ((as (assq reg calculator-registers)) | |
1236 | (val (progn (calculator-enter) (car calculator-stack)))) | |
1237 | (if as | |
1238 | (setcdr as val) | |
1239 | (setq calculator-registers | |
1240 | (cons (cons reg val) calculator-registers))) | |
1241 | (message (format "[%c] := %S" reg val)))) | |
1242 | ||
1243 | (defun calculator-put-value (val) | |
1244 | "Paste VAL as if entered. | |
1245 | Used by `calculator-paste' and `get-register'." | |
1246 | (if (and (numberp val) | |
1247 | ;; (not calculator-curnum) | |
1248 | (or calculator-display-fragile | |
1249 | (not (numberp (car calculator-stack))))) | |
1250 | (progn | |
1251 | (calculator-clear-fragile) | |
1252 | (setq calculator-curnum (calculator-num-to-string val)) | |
1253 | (calculator-update-display)))) | |
1254 | ||
1255 | (defun calculator-paste () | |
1256 | "Paste a value from the `kill-ring'." | |
1257 | (interactive) | |
1258 | (calculator-put-value | |
1259 | (condition-case nil (car (read-from-string (current-kill 0))) | |
1260 | (error nil)))) | |
1261 | ||
1262 | (defun calculator-get-register (reg) | |
1263 | "Get a value from a register REG." | |
1264 | (interactive "cRegister to get value from: ") | |
1265 | (calculator-put-value (cdr (assq reg calculator-registers)))) | |
1266 | ||
1267 | (defun calculator-help () | |
1268 | ;; this is used as the quick reference screen you get with `h' | |
1269 | "Quick reference: | |
1270 | * numbers/operators/parens/./e - enter expressions | |
1271 | + - * / \\(div) %(rem) _(-X,postfix) ;(1/X,postfix) ^(exp) L(og) | |
1272 | Q(sqrt) !(fact) S(in) C(os) T(an) |(or) #(xor) &(and) ~(not) | |
1273 | * >/< repeats last binary operation with its 2nd (1st) arg as postfix op | |
1274 | * I inverses next trig function | |
1275 | * D - switch to all-decimal mode, or toggles deg/rad mode | |
1276 | * B/O/H/X - binary/octal/hex mode for i/o (X is a shortcut for H) | |
1277 | * i/o - prefix for d/b/o/x - set only input/output modes | |
1278 | * enter/= - evaluate current expr. * s/g - set/get a register | |
1279 | * space - evaluate & save on list * l/v - list total/average | |
1280 | * up/down/C-p/C-n - browse saved * C-delete - clear all saved | |
86f1e1ec | 1281 | * C-insert - copy whole expr. * C-return - evaluate, copy, exit |
d240a249 GM |
1282 | * insert - paste a number * backspace- delete backwards |
1283 | * delete - clear argument or list value or whole expression (twice) | |
1284 | * escape/q - exit." | |
1285 | (interactive) | |
1286 | (if (eq last-command 'calculator-help) | |
1287 | (let ((mode-name "Calculator") | |
1288 | (major-mode 'calculator-mode) | |
1289 | (g-map (current-global-map)) | |
1290 | (win (selected-window))) | |
1291 | (require 'ehelp) | |
1292 | (if calculator-electric-mode | |
1293 | (use-global-map calculator-saved-global-map)) | |
1294 | (electric-describe-mode) | |
1295 | (if calculator-electric-mode | |
1296 | (use-global-map g-map)) | |
1297 | (select-window win) ; these are for XEmacs (also below) | |
1298 | (message nil)) | |
1299 | (let ((one (one-window-p t)) | |
1300 | (win (selected-window)) | |
1301 | (help-buf (get-buffer-create "*Help*"))) | |
1302 | (save-window-excursion | |
1303 | (with-output-to-temp-buffer "*Help*" | |
1304 | (princ (documentation 'calculator-help))) | |
1305 | (if one | |
1306 | (shrink-window-if-larger-than-buffer | |
1307 | (get-buffer-window help-buf))) | |
1308 | (message | |
1309 | "`%s' again for more help, any other key continues normally." | |
1310 | (calculator-last-input)) | |
1311 | (select-window win) | |
1312 | (sit-for 360)) | |
1313 | (select-window win)))) | |
1314 | ||
1315 | (defun calculator-quit () | |
1316 | "Quit calculator." | |
1317 | (interactive) | |
1318 | (set-buffer calculator-buffer) | |
1319 | (let ((inhibit-read-only t)) (erase-buffer)) | |
1320 | (if (not calculator-electric-mode) | |
1321 | (progn | |
1322 | (condition-case nil | |
1323 | (while (get-buffer-window calculator-buffer) | |
1324 | (delete-window (get-buffer-window calculator-buffer))) | |
1325 | (error nil)) | |
1326 | (kill-buffer calculator-buffer))) | |
1327 | (setq calculator-buffer nil) | |
1328 | (message "Calculator done.") | |
1329 | (if calculator-electric-mode (throw 'calculator-done nil))) | |
1330 | ||
1331 | (defun calculator-save-and-quit () | |
1332 | "Quit the calculator, saving the result on the `kill-ring'." | |
1333 | (interactive) | |
1334 | (calculator-enter) | |
1335 | (calculator-copy) | |
1336 | (calculator-quit)) | |
1337 | ||
1338 | (defun calculator-funcall (f &optional X Y) | |
1339 | "If F is a symbol, evaluate (F X Y). | |
1340 | Otherwise, it should be a list, evaluate it with X, Y bound to the | |
1341 | arguments." | |
1342 | ;; remember binary ops for calculator-repR/L | |
1343 | (if Y (setq calculator-last-opXY (list f X Y))) | |
1344 | (condition-case nil | |
1345 | (let ((result | |
1346 | (if (symbolp f) | |
1347 | (cond ((and X Y) (funcall f X Y)) | |
1348 | (X (funcall f X)) | |
1349 | (t (funcall f))) | |
1350 | ;; f is an expression | |
1351 | (let* ((__f__ f) ; so we can get this value below... | |
1352 | (TX (calculator-truncate X)) | |
1353 | (TY (and Y (calculator-truncate Y))) | |
1354 | (DX (if calculator-deg (/ (* X pi) 180) X)) | |
1355 | (L calculator-saved-list) | |
1356 | (Fbound (fboundp 'F)) | |
1357 | (Fsave (and Fbound (symbol-function 'F))) | |
1358 | (Dbound (fboundp 'D)) | |
1359 | (Dsave (and Dbound (symbol-function 'D)))) | |
1360 | ;; a shortened version of flet | |
1361 | (fset 'F (function | |
1362 | (lambda (&optional x y) | |
1363 | (calculator-funcall __f__ x y)))) | |
1364 | (fset 'D (function | |
1365 | (lambda (x) | |
1366 | (if calculator-deg (/ (* x 180) pi) x)))) | |
1367 | (unwind-protect (eval f) | |
1368 | (if Fbound (fset 'F Fsave) (fmakunbound 'F)) | |
1369 | (if Dbound (fset 'D Dsave) (fmakunbound 'D))))))) | |
1370 | (if (< (abs result) calculator-epsilon) | |
1371 | 0 | |
1372 | result)) | |
1373 | (error 0))) | |
1374 | ||
1375 | (defun calculator-repR (x) | |
1376 | "Repeats the last binary operation with its second argument and X. | |
1377 | To use this, apply a binary operator (evaluate it), then call this." | |
1378 | (if calculator-last-opXY | |
1379 | ;; avoid rebinding calculator-last-opXY | |
1380 | (let ((calculator-last-opXY calculator-last-opXY)) | |
1381 | (calculator-funcall | |
1382 | (car calculator-last-opXY) x (nth 2 calculator-last-opXY))) | |
1383 | x)) | |
1384 | ||
1385 | (defun calculator-repL (x) | |
1386 | "Repeats the last binary operation with its first argument and X. | |
1387 | To use this, apply a binary operator (evaluate it), then call this." | |
1388 | (if calculator-last-opXY | |
1389 | ;; avoid rebinding calculator-last-opXY | |
1390 | (let ((calculator-last-opXY calculator-last-opXY)) | |
1391 | (calculator-funcall | |
1392 | (car calculator-last-opXY) (nth 1 calculator-last-opXY) x)) | |
1393 | x)) | |
1394 | ||
1395 | (defun calculator-fact (x) | |
1396 | "Simple factorial of X." | |
1397 | (let ((r (if (<= x 10) 1 1.0))) | |
1398 | (while (> x 0) | |
1399 | (setq r (* r (truncate x))) | |
1400 | (setq x (1- x))) | |
1401 | r)) | |
1402 | ||
1403 | (defun calculator-truncate (n) | |
1404 | "Truncate N, return 0 in case of overflow." | |
1405 | (condition-case nil (truncate n) (error 0))) | |
1406 | ||
1407 | ||
1408 | (provide 'calculator) | |
1409 | ||
1410 | ;;; calculator.el ends here |