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e8af40ee | 1 | ;;; calculator.el --- a [not so] simple calculator for Emacs |
d240a249 | 2 | |
25c269ef | 3 | ;; Copyright (C) 1998, 2000 by Free Software Foundation, Inc. |
d240a249 | 4 | |
4ece8d61 | 5 | ;; Author: Eli Barzilay <eli@barzilay.org> |
d240a249 | 6 | ;; Keywords: tools, convenience |
e8af40ee | 7 | ;; Time-stamp: <2001-07-15 11:04:11 pavel> |
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 | ||
cbb2dddb | 26 | ;;;===================================================================== |
d240a249 GM |
27 | ;;; Commentary: |
28 | ;; | |
25c269ef | 29 | ;; A calculator for Emacs. |
5ca425fc | 30 | ;; Why should you reach for your mouse to get xcalc (calc.exe, gcalc or |
25c269ef | 31 | ;; whatever), when you have Emacs running already? |
d240a249 GM |
32 | ;; |
33 | ;; If this is not part of your Emacs distribution, then simply bind | |
34 | ;; `calculator' to a key and make it an autoloaded function, e.g.: | |
35 | ;; (autoload 'calculator "calculator" | |
25c269ef | 36 | ;; "Run the Emacs calculator." t) |
d240a249 GM |
37 | ;; (global-set-key [(control return)] 'calculator) |
38 | ;; | |
25c269ef DL |
39 | ;; Written by Eli Barzilay: Maze is Life! eli@barzilay.org |
40 | ;; http://www.barzilay.org/ | |
d240a249 GM |
41 | ;; |
42 | ;; For latest version, check | |
25c269ef | 43 | ;; http://www.barzilay.org/misc/calculator.el |
d240a249 GM |
44 | |
45 | (eval-and-compile | |
46 | (if (fboundp 'defgroup) nil | |
47 | (defmacro defgroup (&rest forms) nil) | |
48 | (defmacro defcustom (s v d &rest r) (list 'defvar s v d)))) | |
49 | ||
cbb2dddb | 50 | ;;;===================================================================== |
d240a249 GM |
51 | ;;; Customization: |
52 | ||
53 | (defgroup calculator nil | |
25c269ef | 54 | "Simple Emacs calculator." |
d240a249 | 55 | :prefix "calculator" |
7def2f92 | 56 | :version "21.1" |
d240a249 GM |
57 | :group 'tools |
58 | :group 'convenience) | |
59 | ||
60 | (defcustom calculator-electric-mode nil | |
61 | "*Run `calculator' electrically, in the echo area. | |
25c269ef DL |
62 | Electric mode saves some place but changes the way you interact with the |
63 | calculator." | |
d240a249 GM |
64 | :type 'boolean |
65 | :group 'calculator) | |
66 | ||
86f1e1ec GM |
67 | (defcustom calculator-use-menu t |
68 | "*Make `calculator' create a menu. | |
69 | Note that this requires easymenu. Must be set before loading." | |
70 | :type 'boolean | |
71 | :group 'calculator) | |
72 | ||
d240a249 GM |
73 | (defcustom calculator-bind-escape nil |
74 | "*If non-nil, set escape to exit the calculator." | |
75 | :type 'boolean | |
76 | :group 'calculator) | |
77 | ||
78 | (defcustom calculator-unary-style 'postfix | |
79 | "*Value is either 'prefix or 'postfix. | |
80 | This determines the default behavior of unary operators." | |
81 | :type '(choice (const prefix) (const postfix)) | |
82 | :group 'calculator) | |
83 | ||
25c269ef DL |
84 | (defcustom calculator-prompt "Calc=%s> " |
85 | "*The prompt used by the Emacs calculator. | |
d240a249 GM |
86 | It should contain a \"%s\" somewhere that will indicate the i/o radixes, |
87 | this string will be a two-character string as described in the | |
88 | documentation for `calculator-mode'." | |
89 | :type 'string | |
90 | :group 'calculator) | |
91 | ||
25c269ef DL |
92 | (defcustom calculator-number-digits 3 |
93 | "*The calculator's number of digits used for standard display. | |
94 | Used by the `calculator-standard-display' function - it will use the | |
95 | format string \"%.NC\" where this number is N and C is a character given | |
96 | at runtime." | |
2826ac81 | 97 | :type 'integer |
d240a249 GM |
98 | :group 'calculator) |
99 | ||
25c269ef DL |
100 | (defcustom calculator-remove-zeros t |
101 | "*Non-nil value means delete all redundant zero decimal digits. | |
102 | If this value is not t, and not nil, redundant zeros are removed except | |
103 | for one and if it is nil, nothing is removed. | |
104 | Used by the `calculator-remove-zeros' function." | |
105 | :type '(choice (const t) (const leave-decimal) (const nil)) | |
d240a249 GM |
106 | :group 'calculator) |
107 | ||
25c269ef DL |
108 | (defcustom calculator-displayer '(std ?n) |
109 | "*A displayer specification for numerical values. | |
110 | This is the displayer used to show all numbers in an expression. Result | |
111 | values will be displayed according to the first element of | |
112 | `calculator-displayers'. | |
113 | ||
114 | The displayer is a symbol, a string or an expression. A symbol should | |
115 | be the name of a one-argument function, a string is used with a single | |
116 | argument and an expression will be evaluated with the variable `num' | |
117 | bound to whatever should be displayed. If it is a function symbol, it | |
118 | should be able to handle special symbol arguments, currently 'left and | |
119 | 'right which will be sent by special keys to modify display parameters | |
120 | associated with the displayer function (for example to change the number | |
121 | of digits displayed). | |
122 | ||
123 | An exception to the above is the case of the list (std C) where C is a | |
124 | character, in this case the `calculator-standard-displayer' function | |
125 | will be used with this character for a format string.") | |
126 | ||
127 | (defcustom calculator-displayers | |
128 | '(((std ?n) "Standard dislpay, decimal point or scientific") | |
129 | (calculator-eng-display "Eng display") | |
130 | ((std ?f) "Standard display, decimal point") | |
131 | ((std ?e) "Standard dislpay, scientific") | |
132 | ("%S" "Emacs printer")) | |
133 | "*A list of displayers. | |
134 | Each element is a list of a displayer and a description string. The | |
135 | first element is the one which is curently used, this is for the display | |
136 | of result values not values in expressions. A displayer specification | |
137 | is the same as the values that can be stored in `calculator-displayer'. | |
138 | ||
139 | `calculator-rotate-displayer' rotates this list." | |
140 | :type 'sexp | |
d240a249 GM |
141 | :group 'calculator) |
142 | ||
25c269ef DL |
143 | (defcustom calculator-paste-decimals t |
144 | "*If non-nil, convert pasted integers so they have a decimal point. | |
145 | This makes it possible to paste big integers since they will be read as | |
146 | floats, otherwise the Emacs reader will fail on them." | |
d240a249 GM |
147 | :type 'boolean |
148 | :group 'calculator) | |
149 | ||
150 | (defcustom calculator-2s-complement nil | |
151 | "*If non-nil, show negative numbers in 2s complement in radix modes. | |
152 | Otherwise show as a negative number." | |
153 | :type 'boolean | |
154 | :group 'calculator) | |
155 | ||
156 | (defcustom calculator-mode-hook nil | |
25c269ef | 157 | "*List of hook functions for `calculator-mode' to run." |
d240a249 GM |
158 | :type 'hook |
159 | :group 'calculator) | |
160 | ||
161 | (defcustom calculator-user-registers nil | |
162 | "*An association list of user-defined register bindings. | |
d240a249 GM |
163 | Each element in this list is a list of a character and a number that |
164 | will be stored in that character's register. | |
165 | ||
166 | For example, use this to define the golden ratio number: | |
25c269ef DL |
167 | (setq calculator-user-registers '((?g . 1.61803398875))) |
168 | before you load calculator." | |
d240a249 GM |
169 | :type '(repeat (cons character number)) |
170 | :set '(lambda (_ val) | |
171 | (and (boundp 'calculator-registers) | |
172 | (setq calculator-registers | |
173 | (append val calculator-registers))) | |
174 | (setq calculator-user-registers val)) | |
175 | :group 'calculator) | |
176 | ||
177 | (defcustom calculator-user-operators nil | |
178 | "*A list of additional operators. | |
d240a249 GM |
179 | This is a list in the same format as specified in the documentation for |
180 | `calculator-operators', that you can use to bind additional calculator | |
181 | operators. It is probably not a good idea to modify this value with | |
182 | `customize' since it is too complex... | |
183 | ||
184 | Examples: | |
185 | ||
7def2f92 DL |
186 | * A very simple one, adding a postfix \"x-to-y\" conversion keys, using |
187 | t as a prefix key: | |
d240a249 GM |
188 | |
189 | (setq calculator-user-operators | |
190 | '((\"tf\" cl-to-fr (+ 32 (/ (* X 9) 5)) 1) | |
191 | (\"tc\" fr-to-cl (/ (* (- X 32) 5) 9) 1) | |
192 | (\"tp\" kg-to-lb (/ X 0.453592) 1) | |
193 | (\"tk\" lb-to-kg (* X 0.453592) 1) | |
194 | (\"tF\" mt-to-ft (/ X 0.3048) 1) | |
195 | (\"tM\" ft-to-mt (* X 0.3048) 1))) | |
196 | ||
197 | * Using a function-like form is very simple, X for an argument (Y the | |
198 | second in case of a binary operator), TX is a truncated version of X | |
199 | and F does a recursive call, Here is a [very inefficient] Fibonacci | |
200 | number calculation: | |
201 | ||
202 | (add-to-list 'calculator-user-operators | |
203 | '(\"F\" fib (if (<= TX 1) | |
25c269ef DL |
204 | 1 |
205 | (+ (F (- TX 1)) (F (- TX 2)))) 0)) | |
d240a249 GM |
206 | |
207 | Note that this will be either postfix or prefix, according to | |
208 | `calculator-unary-style'." | |
209 | :type '(repeat (list string symbol sexp integer integer)) | |
210 | :group 'calculator) | |
211 | ||
cbb2dddb | 212 | ;;;===================================================================== |
d240a249 GM |
213 | ;;; Code: |
214 | ||
cbb2dddb | 215 | ;;;--------------------------------------------------------------------- |
25c269ef DL |
216 | ;;; Variables |
217 | ||
d240a249 | 218 | (defvar calculator-initial-operators |
86f1e1ec GM |
219 | '(;; "+"/"-" have keybindings of themselves, not calculator-ops |
220 | ("=" = identity 1 -1) | |
25c269ef DL |
221 | (nobind "+" + + 2 4) |
222 | (nobind "-" - - 2 4) | |
223 | (nobind "+" + + -1 9) | |
224 | (nobind "-" - - -1 9) | |
86f1e1ec GM |
225 | ("(" \( identity -1 -1) |
226 | (")" \) identity +1 10) | |
d240a249 GM |
227 | ;; normal keys |
228 | ("|" or (logior TX TY) 2 2) | |
229 | ("#" xor (logxor TX TY) 2 2) | |
230 | ("&" and (logand TX TY) 2 3) | |
231 | ("*" * * 2 5) | |
232 | ("/" / / 2 5) | |
233 | ("\\" div (/ TX TY) 2 5) | |
234 | ("%" rem (% TX TY) 2 5) | |
235 | ("L" log log 2 6) | |
236 | ("S" sin (sin DX) x 6) | |
237 | ("C" cos (cos DX) x 6) | |
238 | ("T" tan (tan DX) x 6) | |
239 | ("IS" asin (D (asin X)) x 6) | |
240 | ("IC" acos (D (acos X)) x 6) | |
241 | ("IT" atan (D (atan X)) x 6) | |
242 | ("Q" sqrt sqrt x 7) | |
243 | ("^" ^ expt 2 7) | |
244 | ("!" ! calculator-fact x 7) | |
245 | (";" 1/ (/ 1 X) 1 7) | |
246 | ("_" - - 1 8) | |
247 | ("~" ~ (lognot TX) x 8) | |
248 | (">" repR calculator-repR 1 8) | |
249 | ("<" repL calculator-repL 1 8) | |
250 | ("v" avg (/ (apply '+ L) (length L)) 0 8) | |
251 | ("l" tot (apply '+ L) 0 8) | |
252 | ) | |
253 | "A list of initial operators. | |
d240a249 GM |
254 | This is a list in the same format as `calculator-operators'. Whenever |
255 | `calculator' starts, it looks at the value of this variable, and if it | |
256 | is not empty, its contents is prepended to `calculator-operators' and | |
257 | the appropriate key bindings are made. | |
258 | ||
259 | This variable is then reset to nil. Don't use this if you want to add | |
260 | user-defined operators, use `calculator-user-operators' instead.") | |
261 | ||
262 | (defvar calculator-operators nil | |
263 | "The calculator operators, each a list with: | |
264 | ||
265 | 1. The key that is bound to for this operation (usually a string); | |
266 | ||
267 | 2. The displayed symbol for this function; | |
268 | ||
269 | 3. The function symbol, or a form that uses the variables `X' and `Y', | |
270 | (if it is a binary operator), `TX' and `TY' (truncated integer | |
271 | versions), `DX' (converted to radians if degrees mode is on), `D' | |
272 | (function for converting radians to degrees if deg mode is on), `L' | |
273 | (list of saved values), `F' (function for recursive iteration calls) | |
274 | and evaluates to the function value - these variables are capital; | |
275 | ||
25c269ef DL |
276 | 4. The function's arity, optional, one of: 2 => binary, -1 => prefix |
277 | unary, +1 => postfix unary, 0 => a 0-arg operator func, non-number => | |
278 | postfix/prefix as determined by `calculator-unary-style' (the | |
279 | default); | |
d240a249 | 280 | |
25c269ef DL |
281 | 5. The function's precedence - should be in the range of 1 (lowest) to |
282 | 9 (highest) (optional, defaults to 1); | |
d240a249 GM |
283 | |
284 | It it possible have a unary prefix version of a binary operator if it | |
285 | comes later in this list. If the list begins with the symbol 'nobind, | |
286 | then no key binding will take place - this is only useful for predefined | |
287 | keys. | |
288 | ||
289 | Use `calculator-user-operators' to add operators to this list, see its | |
290 | documentation for an example.") | |
291 | ||
292 | (defvar calculator-stack nil | |
293 | "Stack contents - operations and operands.") | |
294 | ||
295 | (defvar calculator-curnum nil | |
296 | "Current number being entered (as a string).") | |
297 | ||
298 | (defvar calculator-stack-display nil | |
299 | "Cons of the stack and its string representation.") | |
300 | ||
301 | (defvar calculator-char-radix | |
302 | '((?D . nil) (?B . bin) (?O . oct) (?H . hex) (?X . hex)) | |
303 | "A table to convert input characters to corresponding radix symbols.") | |
304 | ||
305 | (defvar calculator-output-radix nil | |
306 | "The mode for display, one of: nil (decimal), 'bin, 'oct or 'hex.") | |
307 | ||
308 | (defvar calculator-input-radix nil | |
309 | "The mode for input, one of: nil (decimal), 'bin, 'oct or 'hex.") | |
310 | ||
311 | (defvar calculator-deg nil | |
312 | "Non-nil if trig functions operate on degrees instead of radians.") | |
313 | ||
314 | (defvar calculator-saved-list nil | |
315 | "A list of saved values collected.") | |
316 | ||
317 | (defvar calculator-saved-ptr 0 | |
318 | "The pointer to the current saved number.") | |
319 | ||
320 | (defvar calculator-add-saved nil | |
321 | "Bound to t when a value should be added to the saved-list.") | |
322 | ||
323 | (defvar calculator-display-fragile nil | |
324 | "When non-nil, we see something that the next digit should replace.") | |
325 | ||
326 | (defvar calculator-buffer nil | |
327 | "The current calculator buffer.") | |
328 | ||
25c269ef DL |
329 | (defvar calculator-eng-extra nil |
330 | "Internal value used by `calculator-eng-display'.") | |
331 | ||
332 | (defvar calculator-eng-tmp-show nil | |
333 | "Internal value used by `calculator-eng-display'.") | |
334 | ||
d240a249 GM |
335 | (defvar calculator-last-opXY nil |
336 | "The last binary operation and its arguments. | |
337 | Used for repeating operations in calculator-repR/L.") | |
338 | ||
339 | (defvar calculator-registers ; use user-bindings first | |
340 | (append calculator-user-registers (list (cons ?e e) (cons ?p pi))) | |
341 | "The association list of calculator register values.") | |
342 | ||
343 | (defvar calculator-saved-global-map nil | |
344 | "Saved global key map.") | |
345 | ||
86f1e1ec | 346 | (defvar calculator-restart-other-mode nil |
25c269ef DL |
347 | "Used to hack restarting with the electric mode changed.") |
348 | ||
cbb2dddb | 349 | ;;;--------------------------------------------------------------------- |
25c269ef | 350 | ;;; Key bindings |
86f1e1ec | 351 | |
d240a249 GM |
352 | (defvar calculator-mode-map nil |
353 | "The calculator key map.") | |
354 | ||
355 | (or calculator-mode-map | |
86f1e1ec | 356 | (let ((map (make-sparse-keymap))) |
d240a249 GM |
357 | (suppress-keymap map t) |
358 | (define-key map "i" nil) | |
359 | (define-key map "o" nil) | |
86f1e1ec | 360 | (let ((p |
25c269ef DL |
361 | '((calculator-open-paren "[") |
362 | (calculator-close-paren "]") | |
363 | (calculator-op-or-exp "+" "-" [kp-add] [kp-subtract]) | |
364 | (calculator-digit "0" "1" "2" "3" "4" "5" "6" "7" "8" | |
365 | "9" "a" "b" "c" "d" "f" | |
366 | [kp-0] [kp-1] [kp-2] [kp-3] [kp-4] | |
367 | [kp-5] [kp-6] [kp-7] [kp-8] [kp-9]) | |
368 | (calculator-op [kp-divide] [kp-multiply]) | |
369 | (calculator-decimal "." [kp-decimal]) | |
370 | (calculator-exp "e") | |
86f1e1ec GM |
371 | (calculator-dec/deg-mode "D") |
372 | (calculator-set-register "s") | |
373 | (calculator-get-register "g") | |
374 | (calculator-radix-mode "H" "X" "O" "B") | |
375 | (calculator-radix-input-mode "id" "ih" "ix" "io" "ib" | |
376 | "iD" "iH" "iX" "iO" "iB") | |
377 | (calculator-radix-output-mode "od" "oh" "ox" "oo" "ob" | |
378 | "oD" "oH" "oX" "oO" "oB") | |
25c269ef DL |
379 | (calculator-rotate-displayer "'") |
380 | (calculator-rotate-displayer-back "\"") | |
381 | (calculator-displayer-left "{") | |
382 | (calculator-displayer-right "}") | |
86f1e1ec GM |
383 | (calculator-saved-up [up] [?\C-p]) |
384 | (calculator-saved-down [down] [?\C-n]) | |
385 | (calculator-quit "q" [?\C-g]) | |
25c269ef DL |
386 | (calculator-enter [enter] [linefeed] [kp-enter] |
387 | [return] [?\r] [?\n]) | |
86f1e1ec GM |
388 | (calculator-save-on-list " " [space]) |
389 | (calculator-clear-saved [?\C-c] [(control delete)]) | |
390 | (calculator-save-and-quit [(control return)] | |
391 | [(control kp-enter)]) | |
cbb2dddb GM |
392 | (calculator-paste [insert] [(shift insert)] |
393 | [mouse-2]) | |
86f1e1ec GM |
394 | (calculator-clear [delete] [?\C-?] [?\C-d]) |
395 | (calculator-help [?h] [??] [f1] [help]) | |
396 | (calculator-copy [(control insert)]) | |
397 | (calculator-backspace [backspace]) | |
398 | ))) | |
d240a249 | 399 | (while p |
86f1e1ec GM |
400 | ;; reverse the keys so first defs come last - makes the more |
401 | ;; sensible bindings visible in the menu | |
402 | (let ((func (car (car p))) (keys (reverse (cdr (car p))))) | |
403 | (while keys | |
404 | (define-key map (car keys) func) | |
405 | (setq keys (cdr keys)))) | |
d240a249 GM |
406 | (setq p (cdr p)))) |
407 | (if calculator-bind-escape | |
408 | (progn (define-key map [?\e] 'calculator-quit) | |
409 | (define-key map [escape] 'calculator-quit)) | |
410 | (define-key map [?\e ?\e ?\e] 'calculator-quit)) | |
411 | ;; make C-h work in text-mode | |
412 | (or window-system (define-key map [?\C-h] 'calculator-backspace)) | |
86f1e1ec GM |
413 | ;; set up a menu |
414 | (if (and calculator-use-menu (not (boundp 'calculator-menu))) | |
415 | (let ((radix-selectors | |
416 | (mapcar (lambda (x) | |
417 | `([,(nth 0 x) | |
418 | (calculator-radix-mode ,(nth 2 x)) | |
419 | :style radio | |
420 | :keys ,(nth 2 x) | |
421 | :selected | |
422 | (and | |
423 | (eq calculator-input-radix ',(nth 1 x)) | |
424 | (eq calculator-output-radix ',(nth 1 x)))] | |
425 | [,(concat (nth 0 x) " Input") | |
426 | (calculator-radix-input-mode ,(nth 2 x)) | |
427 | :keys ,(concat "i" (downcase (nth 2 x))) | |
428 | :style radio | |
429 | :selected | |
430 | (eq calculator-input-radix ',(nth 1 x))] | |
431 | [,(concat (nth 0 x) " Output") | |
432 | (calculator-radix-output-mode ,(nth 2 x)) | |
433 | :keys ,(concat "o" (downcase (nth 2 x))) | |
434 | :style radio | |
435 | :selected | |
436 | (eq calculator-output-radix ',(nth 1 x))])) | |
437 | '(("Decimal" nil "D") | |
438 | ("Binary" bin "B") | |
439 | ("Octal" oct "O") | |
440 | ("Hexadecimal" hex "H")))) | |
441 | (op '(lambda (name key) | |
442 | `[,name (calculator-op ,key) :keys ,key]))) | |
443 | (easy-menu-define | |
444 | calculator-menu map "Calculator menu." | |
445 | `("Calculator" | |
446 | ["Help" | |
447 | (let ((last-command 'calculator-help)) (calculator-help)) | |
448 | :keys "?"] | |
449 | "---" | |
450 | ["Copy" calculator-copy] | |
451 | ["Paste" calculator-paste] | |
452 | "---" | |
453 | ["Electric mode" | |
454 | (progn (calculator-quit) | |
455 | (setq calculator-restart-other-mode t) | |
456 | (run-with-timer 0.1 nil '(lambda () (message nil))) | |
457 | ;; the message from the menu will be visible, | |
458 | ;; couldn't make it go away... | |
459 | (calculator)) | |
460 | :active (not calculator-electric-mode)] | |
461 | ["Normal mode" | |
462 | (progn (setq calculator-restart-other-mode t) | |
463 | (calculator-quit)) | |
464 | :active calculator-electric-mode] | |
465 | "---" | |
466 | ("Functions" | |
467 | ,(funcall op "Repeat-right" ">") | |
468 | ,(funcall op "Repeat-left" "<") | |
469 | "------General------" | |
470 | ,(funcall op "Reciprocal" ";") | |
471 | ,(funcall op "Log" "L") | |
472 | ,(funcall op "Square-root" "Q") | |
473 | ,(funcall op "Factorial" "!") | |
474 | "------Trigonometric------" | |
475 | ,(funcall op "Sinus" "S") | |
476 | ,(funcall op "Cosine" "C") | |
477 | ,(funcall op "Tangent" "T") | |
478 | ,(funcall op "Inv-Sinus" "IS") | |
479 | ,(funcall op "Inv-Cosine" "IC") | |
480 | ,(funcall op "Inv-Tangent" "IT") | |
481 | "------Bitwise------" | |
482 | ,(funcall op "Or" "|") | |
483 | ,(funcall op "Xor" "#") | |
484 | ,(funcall op "And" "&") | |
485 | ,(funcall op "Not" "~")) | |
486 | ("Saved List" | |
487 | ["Eval+Save" calculator-save-on-list] | |
488 | ["Prev number" calculator-saved-up] | |
489 | ["Next number" calculator-saved-down] | |
490 | ["Delete current" calculator-clear | |
491 | :active (and calculator-display-fragile | |
492 | calculator-saved-list | |
493 | (= (car calculator-stack) | |
494 | (nth calculator-saved-ptr | |
495 | calculator-saved-list)))] | |
496 | ["Delete all" calculator-clear-saved] | |
497 | "---" | |
498 | ,(funcall op "List-total" "l") | |
499 | ,(funcall op "List-average" "v")) | |
500 | ("Registers" | |
501 | ["Get register" calculator-get-register] | |
502 | ["Set register" calculator-set-register]) | |
503 | ("Modes" | |
504 | ["Radians" | |
505 | (progn | |
506 | (and (or calculator-input-radix calculator-output-radix) | |
507 | (calculator-radix-mode "D")) | |
508 | (and calculator-deg (calculator-dec/deg-mode))) | |
509 | :keys "D" | |
510 | :style radio | |
511 | :selected (not (or calculator-input-radix | |
512 | calculator-output-radix | |
513 | calculator-deg))] | |
514 | ["Degrees" | |
515 | (progn | |
516 | (and (or calculator-input-radix calculator-output-radix) | |
517 | (calculator-radix-mode "D")) | |
518 | (or calculator-deg (calculator-dec/deg-mode))) | |
519 | :keys "D" | |
520 | :style radio | |
521 | :selected (and calculator-deg | |
522 | (not (or calculator-input-radix | |
523 | calculator-output-radix)))] | |
524 | "---" | |
525 | ,@(mapcar 'car radix-selectors) | |
526 | ("Seperate I/O" | |
527 | ,@(mapcar (lambda (x) (nth 1 x)) radix-selectors) | |
528 | "---" | |
529 | ,@(mapcar (lambda (x) (nth 2 x)) radix-selectors))) | |
25c269ef DL |
530 | ("Decimal Dislpay" |
531 | ,@(mapcar (lambda (d) | |
532 | (vector (cadr d) | |
533 | ;; Note: inserts actual object here | |
534 | `(calculator-rotate-displayer ',d))) | |
535 | calculator-displayers) | |
536 | "---" | |
537 | ["Change Display Left" calculator-displayer-left] | |
538 | ["Change Display Right" calculator-displayer-right]) | |
86f1e1ec GM |
539 | "---" |
540 | ["Copy+Quit" calculator-save-and-quit] | |
541 | ["Quit" calculator-quit])))) | |
d240a249 GM |
542 | (setq calculator-mode-map map))) |
543 | ||
cbb2dddb | 544 | ;;;--------------------------------------------------------------------- |
25c269ef DL |
545 | ;;; Startup and mode stuff |
546 | ||
d240a249 | 547 | (defun calculator-mode () |
25c269ef DL |
548 | ;; this help is also used as the major help screen |
549 | "A [not so] simple calculator for Emacs. | |
d240a249 GM |
550 | |
551 | This calculator is used in the same way as other popular calculators | |
552 | like xcalc or calc.exe - but using an Emacs interface. | |
553 | ||
554 | Expressions are entered using normal infix notation, parens are used as | |
555 | normal. Unary functions are usually postfix, but some depends on the | |
556 | value of `calculator-unary-style' (if the style for an operator below is | |
557 | specified, then it is fixed, otherwise it depends on this variable). | |
558 | `+' and `-' can be used as either binary operators or prefix unary | |
559 | operators. Numbers can be entered with exponential notation using `e', | |
560 | except when using a non-decimal radix mode for input (in this case `e' | |
561 | will be the hexadecimal digit). | |
562 | ||
563 | Here are the editing keys: | |
564 | * `RET' `=' evaluate the current expression | |
565 | * `C-insert' copy the whole current expression to the `kill-ring' | |
86f1e1ec | 566 | * `C-return' evaluate, save result the `kill-ring' and exit |
d240a249 GM |
567 | * `insert' paste a number if the one was copied (normally) |
568 | * `delete' `C-d' clear last argument or whole expression (hit twice) | |
569 | * `backspace' delete a digit or a previous expression element | |
570 | * `h' `?' pop-up a quick reference help | |
571 | * `ESC' `q' exit (`ESC' can be used if `calculator-bind-escape' is | |
572 | non-nil, otherwise use three consecutive `ESC's) | |
573 | ||
574 | These operators are pre-defined: | |
575 | * `+' `-' `*' `/' the common binary operators | |
576 | * `\\' `%' integer division and reminder | |
577 | * `_' `;' postfix unary negation and reciprocal | |
578 | * `^' `L' binary operators for x^y and log(x) in base y | |
579 | * `Q' `!' unary square root and factorial | |
580 | * `S' `C' `T' unary trigonometric operators - sin, cos and tan | |
581 | * `|' `#' `&' `~' bitwise operators - or, xor, and, not | |
582 | ||
583 | The trigonometric functions can be inverted if prefixed with an `I', see | |
584 | below for the way to use degrees instead of the default radians. | |
585 | ||
586 | Two special postfix unary operators are `>' and `<': whenever a binary | |
587 | operator is performed, it is remembered along with its arguments; then | |
588 | `>' (`<') will apply the same operator with the same right (left) | |
589 | argument. | |
590 | ||
591 | hex/oct/bin modes can be set for input and for display separately. | |
592 | Another toggle-able mode is for using degrees instead of radians for | |
593 | trigonometric functions. | |
594 | The keys to switch modes are (`X' is shortcut for `H'): | |
595 | * `D' switch to all-decimal mode, or toggle degrees/radians | |
596 | * `B' `O' `H' `X' binary/octal/hexadecimal modes for input & display | |
597 | * `i' `o' followed by one of `D' `B' `O' `H' `X' (case | |
598 | insensitive) sets only the input or display radix mode | |
599 | The prompt indicates the current modes: | |
600 | * \"D=\": degrees mode; | |
601 | * \"?=\": (? is B/O/H) this is the radix for both input and output; | |
602 | * \"=?\": (? is B/O/H) the display radix (when input is decimal); | |
603 | * \"??\": (? is D/B/O/H) 1st char for input radix, 2nd for display. | |
604 | ||
25c269ef DL |
605 | Also, the quote character can be used to switch display modes for |
606 | decimal numbers (double-quote rotates back), and the two brace | |
607 | characters (\"{\" and \"}\" change display parameters that these | |
608 | displayers use (if they handle such). | |
609 | ||
d240a249 GM |
610 | Values can be saved for future reference in either a list of saved |
611 | values, or in registers. | |
612 | ||
613 | The list of saved values is useful for statistics operations on some | |
614 | collected data. It is possible to navigate in this list, and if the | |
615 | value shown is the current one on the list, an indication is displayed | |
616 | as \"[N]\" if this is the last number and there are N numbers, or | |
617 | \"[M/N]\" if the M-th value is shown. | |
618 | * `SPC' evaluate the current value as usual, but also adds | |
619 | the result to the list of saved values | |
620 | * `l' `v' computes total / average of saved values | |
621 | * `up' `C-p' browse to the previous value in the list | |
622 | * `down' `C-n' browse to the next value in the list | |
623 | * `delete' `C-d' remove current value from the list (if it is on it) | |
624 | * `C-delete' `C-c' delete the whole list | |
625 | ||
626 | Registers are variable-like place-holders for values: | |
627 | * `s' followed by a character attach the current value to that character | |
628 | * `g' followed by a character fetches the attached value | |
629 | ||
630 | There are many variables that can be used to customize the calculator. | |
631 | Some interesting customization variables are: | |
632 | * `calculator-electric-mode' use only the echo-area electrically. | |
633 | * `calculator-unary-style' set most unary ops to pre/postfix style. | |
634 | * `calculator-user-registers' to define user-preset registers. | |
635 | * `calculator-user-operators' to add user-defined operators. | |
636 | See the documentation for these variables, and \"calculator.el\" for | |
637 | more information. | |
638 | ||
639 | \\{calculator-mode-map}" | |
640 | (interactive) | |
641 | (kill-all-local-variables) | |
642 | (setq major-mode 'calculator-mode) | |
643 | (setq mode-name "Calculator") | |
644 | (use-local-map calculator-mode-map) | |
645 | (run-hooks 'calculator-mode-hook)) | |
646 | ||
25c269ef DL |
647 | (eval-when-compile (require 'electric) (require 'ehelp)) |
648 | ||
d240a249 GM |
649 | ;;;###autoload |
650 | (defun calculator () | |
25c269ef | 651 | "Run the Emacs calculator. |
d240a249 GM |
652 | See the documentation for `calculator-mode' for more information." |
653 | (interactive) | |
86f1e1ec GM |
654 | (if calculator-restart-other-mode |
655 | (setq calculator-electric-mode (not calculator-electric-mode))) | |
d240a249 GM |
656 | (if calculator-initial-operators |
657 | (progn (calculator-add-operators calculator-initial-operators) | |
658 | (setq calculator-initial-operators nil) | |
659 | ;; don't change this since it is a customization variable, | |
25c269ef | 660 | ;; its set function will add any new operators |
d240a249 | 661 | (calculator-add-operators calculator-user-operators))) |
d240a249 GM |
662 | (if calculator-electric-mode |
663 | (save-window-excursion | |
86f1e1ec | 664 | (progn (require 'electric) (message nil)) ; hide load message |
d240a249 GM |
665 | (let (old-g-map old-l-map (echo-keystrokes 0) |
666 | (garbage-collection-messages nil)) ; no gc msg when electric | |
d240a249 GM |
667 | ;; strange behavior in FSF: doesn't always select correct |
668 | ;; minibuffer. I have no idea how to fix this | |
669 | (setq calculator-buffer (window-buffer (minibuffer-window))) | |
670 | (select-window (minibuffer-window)) | |
671 | (calculator-reset) | |
672 | (calculator-update-display) | |
673 | (setq old-l-map (current-local-map)) | |
674 | (setq old-g-map (current-global-map)) | |
675 | (setq calculator-saved-global-map (current-global-map)) | |
86f1e1ec | 676 | (use-local-map nil) |
d240a249 GM |
677 | (use-global-map calculator-mode-map) |
678 | (unwind-protect | |
679 | (catch 'calculator-done | |
680 | (Electric-command-loop | |
681 | 'calculator-done | |
682 | ;; can't use 'noprompt, bug in electric.el | |
683 | '(lambda () 'noprompt) | |
684 | nil | |
86f1e1ec | 685 | (lambda (x y) (calculator-update-display)))) |
d240a249 GM |
686 | (and calculator-buffer |
687 | (catch 'calculator-done (calculator-quit))) | |
688 | (use-local-map old-l-map) | |
689 | (use-global-map old-g-map)))) | |
86f1e1ec GM |
690 | (progn |
691 | (setq calculator-buffer | |
692 | (or (and (bufferp calculator-buffer) | |
693 | (buffer-live-p calculator-buffer) | |
694 | calculator-buffer) | |
695 | (if calculator-electric-mode | |
696 | (get-buffer-create "*calculator*") | |
697 | (let ((split-window-keep-point nil) | |
698 | (window-min-height 2)) | |
699 | (select-window | |
25c269ef DL |
700 | ;; maybe leave two lines for our window because |
701 | ;; of the normal `raised' modeline in Emacs 21 | |
702 | (split-window-vertically | |
703 | (- (window-height) | |
704 | (if (and | |
705 | (fboundp 'face-attr-construct) | |
706 | (plist-get (face-attr-construct 'modeline) | |
707 | :box)) | |
708 | 3 | |
709 | 2)))) | |
86f1e1ec GM |
710 | (switch-to-buffer |
711 | (get-buffer-create "*calculator*")))))) | |
712 | (set-buffer calculator-buffer) | |
713 | (calculator-mode) | |
714 | (setq buffer-read-only t) | |
715 | (calculator-reset) | |
716 | (message "Hit `?' For a quick help screen."))) | |
717 | (if (and calculator-restart-other-mode calculator-electric-mode) | |
718 | (calculator))) | |
d240a249 | 719 | |
cbb2dddb | 720 | ;;;--------------------------------------------------------------------- |
25c269ef DL |
721 | ;;; Operatos |
722 | ||
d240a249 GM |
723 | (defun calculator-op-arity (op) |
724 | "Return OP's arity, 2, +1 or -1." | |
725 | (let ((arity (or (nth 3 op) 'x))) | |
726 | (if (numberp arity) | |
727 | arity | |
728 | (if (eq calculator-unary-style 'postfix) +1 -1)))) | |
729 | ||
730 | (defun calculator-op-prec (op) | |
731 | "Return OP's precedence for reducing when inserting into the stack. | |
732 | Defaults to 1." | |
733 | (or (nth 4 op) 1)) | |
734 | ||
735 | (defun calculator-add-operators (more-ops) | |
736 | "This function handles operator addition. | |
737 | Adds MORE-OPS to `calculator-operator', called initially to handle | |
738 | `calculator-initial-operators' and `calculator-user-operators'." | |
739 | (let ((added-ops nil)) | |
740 | (while more-ops | |
741 | (or (eq (car (car more-ops)) 'nobind) | |
742 | (let ((i -1) (key (car (car more-ops)))) | |
743 | ;; make sure the key is undefined, so it's easy to define | |
744 | ;; prefix keys | |
745 | (while (< (setq i (1+ i)) (length key)) | |
746 | (or (keymapp | |
747 | (lookup-key calculator-mode-map | |
748 | (substring key 0 (1+ i)))) | |
749 | (progn | |
750 | (define-key | |
751 | calculator-mode-map (substring key 0 (1+ i)) nil) | |
752 | (setq i (length key))))) | |
753 | (define-key calculator-mode-map key 'calculator-op))) | |
754 | (setq added-ops (cons (if (eq (car (car more-ops)) 'nobind) | |
755 | (cdr (car more-ops)) | |
756 | (car more-ops)) | |
757 | added-ops)) | |
758 | (setq more-ops (cdr more-ops))) | |
759 | ;; added-ops come first, but in correct order | |
760 | (setq calculator-operators | |
761 | (append (nreverse added-ops) calculator-operators)))) | |
762 | ||
cbb2dddb | 763 | ;;;--------------------------------------------------------------------- |
25c269ef DL |
764 | ;;; Display stuff |
765 | ||
d240a249 GM |
766 | (defun calculator-reset () |
767 | "Reset calculator variables." | |
86f1e1ec GM |
768 | (or calculator-restart-other-mode |
769 | (setq calculator-stack nil | |
770 | calculator-curnum nil | |
771 | calculator-stack-display nil | |
772 | calculator-display-fragile nil)) | |
773 | (setq calculator-restart-other-mode nil) | |
d240a249 GM |
774 | (calculator-update-display)) |
775 | ||
776 | (defun calculator-get-prompt () | |
777 | "Return a string to display. | |
778 | The string is set not to exceed the screen width." | |
779 | (let* ((calculator-prompt | |
780 | (format calculator-prompt | |
781 | (cond | |
782 | ((or calculator-output-radix calculator-input-radix) | |
783 | (if (eq calculator-output-radix | |
784 | calculator-input-radix) | |
785 | (concat | |
786 | (char-to-string | |
787 | (car (rassq calculator-output-radix | |
788 | calculator-char-radix))) | |
789 | "=") | |
790 | (concat | |
791 | (if calculator-input-radix | |
792 | (char-to-string | |
793 | (car (rassq calculator-input-radix | |
794 | calculator-char-radix))) | |
795 | "=") | |
796 | (char-to-string | |
797 | (car (rassq calculator-output-radix | |
798 | calculator-char-radix)))))) | |
799 | (calculator-deg "D=") | |
800 | (t "==")))) | |
801 | (prompt | |
802 | (concat calculator-prompt | |
803 | (cdr calculator-stack-display) | |
804 | (cond (calculator-curnum | |
805 | ;; number being typed | |
806 | (concat calculator-curnum "_")) | |
807 | ((and (= 1 (length calculator-stack)) | |
808 | calculator-display-fragile) | |
809 | ;; only the result is shown, next number will | |
810 | ;; restart | |
811 | nil) | |
812 | (t | |
813 | ;; waiting for a number or an operator | |
814 | "?")))) | |
815 | (trim (- (length prompt) (1- (window-width))))) | |
816 | (if (<= trim 0) | |
817 | prompt | |
818 | (concat calculator-prompt | |
819 | (substring prompt (+ trim (length calculator-prompt))))))) | |
820 | ||
821 | (defun calculator-curnum-value () | |
822 | "Get the numeric value of the displayed number string as a float." | |
823 | (if calculator-input-radix | |
824 | (let ((radix | |
825 | (cdr (assq calculator-input-radix | |
826 | '((bin . 2) (oct . 8) (hex . 16))))) | |
827 | (i -1) (value 0)) | |
828 | ;; assume valid input (upcased & characters in range) | |
829 | (while (< (setq i (1+ i)) (length calculator-curnum)) | |
830 | (setq value | |
831 | (+ (let ((ch (aref calculator-curnum i))) | |
832 | (- ch (if (<= ch ?9) ?0 (- ?A 10)))) | |
833 | (* radix value)))) | |
834 | value) | |
835 | (car | |
836 | (read-from-string | |
837 | (cond | |
838 | ((equal "." calculator-curnum) | |
839 | "0.0") | |
840 | ((string-match "[eE][+-]?$" calculator-curnum) | |
841 | (concat calculator-curnum "0")) | |
842 | ((string-match "\\.[0-9]\\|[eE]" calculator-curnum) | |
843 | calculator-curnum) | |
844 | ((string-match "\\." calculator-curnum) | |
25c269ef | 845 | ;; do this because Emacs reads "23." as an integer |
d240a249 GM |
846 | (concat calculator-curnum "0")) |
847 | ((stringp calculator-curnum) | |
848 | (concat calculator-curnum ".0")) | |
849 | (t "0.0")))))) | |
850 | ||
25c269ef DL |
851 | (defun calculator-rotate-displayer (&optional new-disp) |
852 | "Switch to the next displayer on the `calculator-displayers' list. | |
853 | Can be called with an optional argument NEW-DISP to force rotation to | |
854 | that argument." | |
855 | (interactive) | |
856 | (setq calculator-displayers | |
857 | (if (and new-disp (memq new-disp calculator-displayers)) | |
858 | (let ((tmp nil)) | |
859 | (while (not (eq (car calculator-displayers) new-disp)) | |
860 | (setq tmp (cons (car calculator-displayers) tmp)) | |
861 | (setq calculator-displayers (cdr calculator-displayers))) | |
862 | (setq calculator-displayers | |
863 | (nconc calculator-displayers (nreverse tmp)))) | |
864 | (nconc (cdr calculator-displayers) | |
865 | (list (car calculator-displayers))))) | |
866 | (message "Using %s." (cadr (car calculator-displayers))) | |
867 | (if calculator-electric-mode | |
868 | (progn (sit-for 1) (message nil))) | |
869 | (calculator-enter)) | |
870 | ||
871 | (defun calculator-rotate-displayer-back () | |
872 | "Like `calculator-rotate-displayer', but rotates modes back." | |
873 | (interactive) | |
874 | (calculator-rotate-displayer (car (last calculator-displayers)))) | |
875 | ||
876 | (defun calculator-displayer-left () | |
877 | "Send the current displayer function a 'left argument. | |
878 | This is used to modify display arguments (if the current displayer | |
879 | function supports this)." | |
880 | (interactive) | |
881 | (and (car calculator-displayers) | |
882 | (let ((disp (caar calculator-displayers))) | |
883 | (cond ((symbolp disp) (funcall disp 'left)) | |
884 | ((and (consp disp) (eq 'std (car disp))) | |
885 | (calculator-standard-displayer 'left (cadr disp))))))) | |
886 | ||
887 | (defun calculator-displayer-right () | |
888 | "Send the current displayer function a 'right argument. | |
889 | This is used to modify display arguments (if the current displayer | |
890 | function supports this)." | |
891 | (interactive) | |
892 | (and (car calculator-displayers) | |
893 | (let ((disp (caar calculator-displayers))) | |
894 | (cond ((symbolp disp) (funcall disp 'right)) | |
895 | ((and (consp disp) (eq 'std (car disp))) | |
896 | (calculator-standard-displayer 'right (cadr disp))))))) | |
897 | ||
898 | (defun calculator-remove-zeros (numstr) | |
899 | "Get a number string NUMSTR and remove unnecessary zeroes. | |
900 | the behavior of this function is controlled by | |
901 | `calculator-remove-zeros'." | |
902 | (cond ((and (eq calculator-remove-zeros t) | |
903 | (string-match "\\.0+\\([eE][+-]?[0-9]*\\)?$" numstr)) | |
904 | ;; remove all redundant zeros leaving an integer | |
905 | (if (match-beginning 1) | |
906 | (concat (substring numstr 0 (match-beginning 0)) | |
907 | (match-string 1 numstr)) | |
908 | (substring numstr 0 (match-beginning 0)))) | |
909 | ((and calculator-remove-zeros | |
910 | (string-match | |
911 | "\\..\\([0-9]*[1-9]\\)?\\(0+\\)\\([eE][+-]?[0-9]*\\)?$" | |
912 | numstr)) | |
913 | ;; remove zeros, except for first after the "." | |
914 | (if (match-beginning 3) | |
915 | (concat (substring numstr 0 (match-beginning 2)) | |
916 | (match-string 3 numstr)) | |
917 | (substring numstr 0 (match-beginning 2)))) | |
918 | (t numstr))) | |
919 | ||
920 | (defun calculator-standard-displayer (num char) | |
921 | "Standard display function, used to display NUM. | |
922 | Its behavior is determined by `calculator-number-digits' and the given | |
923 | CHAR argument (both will be used to compose a format string). If the | |
924 | char is \"n\" then this function will choose one between %f or %e, this | |
925 | is a work around %g jumping to exponential notation too fast. | |
926 | ||
927 | The special 'left and 'right symbols will make it change the current | |
928 | number of digits displayed (`calculator-number-digits'). | |
929 | ||
930 | It will also remove redundant zeros from the result." | |
931 | (if (symbolp num) | |
932 | (cond ((eq num 'left) | |
933 | (and (> calculator-number-digits 0) | |
934 | (setq calculator-number-digits | |
935 | (1- calculator-number-digits)) | |
936 | (calculator-enter))) | |
937 | ((eq num 'right) | |
938 | (setq calculator-number-digits | |
939 | (1+ calculator-number-digits)) | |
940 | (calculator-enter))) | |
941 | (let ((str (format | |
942 | (concat "%." | |
943 | (number-to-string calculator-number-digits) | |
944 | (if (eq char ?n) | |
945 | (let ((n (abs num))) | |
946 | (if (or (< n 0.001) (> n 1e8)) "e" "f")) | |
947 | (string char))) | |
948 | num))) | |
949 | (calculator-remove-zeros str)))) | |
950 | ||
951 | (defun calculator-eng-display (num) | |
952 | "Display NUM in engineering notation. | |
953 | The number of decimal digits used is controlled by | |
954 | `calculator-number-digits', so to change it at runtime you have to use | |
955 | the 'left or 'right when one of the standard modes is used." | |
956 | (if (symbolp num) | |
957 | (cond ((eq num 'left) | |
958 | (setq calculator-eng-extra | |
959 | (if calculator-eng-extra | |
960 | (1+ calculator-eng-extra) | |
961 | 1)) | |
962 | (let ((calculator-eng-tmp-show t)) (calculator-enter))) | |
963 | ((eq num 'right) | |
964 | (setq calculator-eng-extra | |
965 | (if calculator-eng-extra | |
966 | (1- calculator-eng-extra) | |
967 | -1)) | |
968 | (let ((calculator-eng-tmp-show t)) (calculator-enter)))) | |
969 | (let ((exp 0)) | |
970 | (and (not (= 0 num)) | |
971 | (progn | |
972 | (while (< (abs num) 1.0) | |
973 | (setq num (* num 1000.0)) (setq exp (- exp 3))) | |
974 | (while (> (abs num) 999.0) | |
975 | (setq num (/ num 1000.0)) (setq exp (+ exp 3))) | |
976 | (and calculator-eng-tmp-show | |
977 | (not (= 0 calculator-eng-extra)) | |
978 | (let ((i calculator-eng-extra)) | |
979 | (while (> i 0) | |
980 | (setq num (* num 1000.0)) (setq exp (- exp 3)) | |
981 | (setq i (1- i))) | |
982 | (while (< i 0) | |
983 | (setq num (/ num 1000.0)) (setq exp (+ exp 3)) | |
984 | (setq i (1+ i))))))) | |
985 | (or calculator-eng-tmp-show (setq calculator-eng-extra nil)) | |
986 | (let ((str (format (concat "%." calculator-number-digits "f") | |
987 | num))) | |
988 | (concat (let ((calculator-remove-zeros | |
989 | ;; make sure we don't leave integers | |
990 | (and calculator-remove-zeros 'x))) | |
991 | (calculator-remove-zeros str)) | |
992 | "e" (number-to-string exp)))))) | |
993 | ||
d240a249 GM |
994 | (defun calculator-num-to-string (num) |
995 | "Convert NUM to a displayable string." | |
996 | (cond | |
997 | ((and (numberp num) calculator-output-radix) | |
998 | ;; print with radix - for binary I convert the octal number | |
999 | (let ((str (format (if (eq calculator-output-radix 'hex) "%x" "%o") | |
1000 | (calculator-truncate | |
1001 | (if calculator-2s-complement num (abs num)))))) | |
1002 | (if (eq calculator-output-radix 'bin) | |
1003 | (let ((i -1) (s "")) | |
1004 | (while (< (setq i (1+ i)) (length str)) | |
1005 | (setq s | |
1006 | (concat s | |
1007 | (cdr (assq (aref str i) | |
1008 | '((?0 . "000") (?1 . "001") | |
1009 | (?2 . "010") (?3 . "011") | |
1010 | (?4 . "100") (?5 . "101") | |
1011 | (?6 . "110") (?7 . "111"))))))) | |
1012 | (string-match "^0*\\(.+\\)" s) | |
1013 | (setq str (match-string 1 s)))) | |
1014 | (upcase | |
1015 | (if (and (not calculator-2s-complement) (< num 0)) | |
1016 | (concat "-" str) | |
1017 | str)))) | |
25c269ef DL |
1018 | ((and (numberp num) (car calculator-displayers)) |
1019 | (let ((disp (if (= 1 (length calculator-stack)) | |
1020 | ;; customizable display for a single value | |
1021 | (caar calculator-displayers) | |
1022 | calculator-displayer))) | |
1023 | (cond ((stringp disp) (format disp num)) | |
1024 | ((symbolp disp) (funcall disp num)) | |
1025 | ((and (consp disp) | |
1026 | (eq 'std (car disp))) | |
1027 | (calculator-standard-displayer | |
1028 | num (cadr disp))) | |
1029 | ((listp disp) (eval disp)) | |
1030 | (t (prin1-to-string num t))))) | |
1031 | ;; operators are printed here | |
d240a249 GM |
1032 | (t (prin1-to-string (nth 1 num) t)))) |
1033 | ||
1034 | (defun calculator-update-display (&optional force) | |
1035 | "Update the display. | |
1036 | If optional argument FORCE is non-nil, don't use the cached string." | |
1037 | (set-buffer calculator-buffer) | |
1038 | ;; update calculator-stack-display | |
1039 | (if (or force | |
1040 | (not (eq (car calculator-stack-display) calculator-stack))) | |
1041 | (setq calculator-stack-display | |
1042 | (cons calculator-stack | |
1043 | (if calculator-stack | |
1044 | (concat | |
1045 | (mapconcat 'calculator-num-to-string | |
1046 | (reverse calculator-stack) | |
1047 | " ") | |
1048 | " " | |
1049 | (and calculator-display-fragile | |
1050 | calculator-saved-list | |
1051 | (= (car calculator-stack) | |
1052 | (nth calculator-saved-ptr | |
1053 | calculator-saved-list)) | |
1054 | (if (= 0 calculator-saved-ptr) | |
1055 | (format "[%s]" (length calculator-saved-list)) | |
1056 | (format "[%s/%s]" | |
1057 | (- (length calculator-saved-list) | |
1058 | calculator-saved-ptr) | |
1059 | (length calculator-saved-list))))) | |
1060 | "")))) | |
1061 | (let ((inhibit-read-only t)) | |
1062 | (erase-buffer) | |
1063 | (insert (calculator-get-prompt))) | |
1064 | (set-buffer-modified-p nil) | |
1065 | (if calculator-display-fragile | |
1066 | (goto-char (1+ (length calculator-prompt))) | |
1067 | (goto-char (1- (point))))) | |
1068 | ||
cbb2dddb | 1069 | ;;;--------------------------------------------------------------------- |
25c269ef DL |
1070 | ;;; Stack computations |
1071 | ||
d240a249 GM |
1072 | (defun calculator-reduce-stack (prec) |
1073 | "Reduce the stack using top operator. | |
1074 | PREC is a precedence - reduce everything with higher precedence." | |
1075 | (while | |
1076 | (cond | |
1077 | ((and (cdr (cdr calculator-stack)) ; have three values | |
1078 | (consp (nth 0 calculator-stack)) ; two operators & num | |
1079 | (numberp (nth 1 calculator-stack)) | |
1080 | (consp (nth 2 calculator-stack)) | |
1081 | (eq '\) (nth 1 (nth 0 calculator-stack))) | |
1082 | (eq '\( (nth 1 (nth 2 calculator-stack)))) | |
1083 | ;; reduce "... ( x )" --> "... x" | |
1084 | (setq calculator-stack | |
1085 | (cons (nth 1 calculator-stack) | |
1086 | (nthcdr 3 calculator-stack))) | |
1087 | ;; another iteration | |
1088 | t) | |
1089 | ((and (cdr (cdr calculator-stack)) ; have three values | |
1090 | (numberp (nth 0 calculator-stack)) ; two nums & operator | |
1091 | (consp (nth 1 calculator-stack)) | |
1092 | (numberp (nth 2 calculator-stack)) | |
1093 | (= 2 (calculator-op-arity ; binary operator | |
1094 | (nth 1 calculator-stack))) | |
1095 | (<= prec ; with higher prec. | |
1096 | (calculator-op-prec (nth 1 calculator-stack)))) | |
1097 | ;; reduce "... x op y" --> "... r", r is the result | |
1098 | (setq calculator-stack | |
1099 | (cons (calculator-funcall | |
1100 | (nth 2 (nth 1 calculator-stack)) | |
1101 | (nth 2 calculator-stack) | |
1102 | (nth 0 calculator-stack)) | |
1103 | (nthcdr 3 calculator-stack))) | |
1104 | ;; another iteration | |
1105 | t) | |
1106 | ((and (>= (length calculator-stack) 2) ; have two values | |
1107 | (numberp (nth 0 calculator-stack)) ; number & operator | |
1108 | (consp (nth 1 calculator-stack)) | |
1109 | (= -1 (calculator-op-arity ; prefix-unary op | |
1110 | (nth 1 calculator-stack))) | |
1111 | (<= prec ; with higher prec. | |
1112 | (calculator-op-prec (nth 1 calculator-stack)))) | |
1113 | ;; reduce "... op x" --> "... r" for prefix op | |
1114 | (setq calculator-stack | |
1115 | (cons (calculator-funcall | |
1116 | (nth 2 (nth 1 calculator-stack)) | |
1117 | (nth 0 calculator-stack)) | |
1118 | (nthcdr 2 calculator-stack))) | |
1119 | ;; another iteration | |
1120 | t) | |
1121 | ((and (cdr calculator-stack) ; have two values | |
1122 | (consp (nth 0 calculator-stack)) ; operator & number | |
1123 | (numberp (nth 1 calculator-stack)) | |
1124 | (= +1 (calculator-op-arity ; postfix-unary op | |
1125 | (nth 0 calculator-stack))) | |
1126 | (<= prec ; with higher prec. | |
1127 | (calculator-op-prec (nth 0 calculator-stack)))) | |
1128 | ;; reduce "... x op" --> "... r" for postfix op | |
1129 | (setq calculator-stack | |
1130 | (cons (calculator-funcall | |
1131 | (nth 2 (nth 0 calculator-stack)) | |
1132 | (nth 1 calculator-stack)) | |
1133 | (nthcdr 2 calculator-stack))) | |
1134 | ;; another iteration | |
1135 | t) | |
1136 | ((and calculator-stack ; have one value | |
1137 | (consp (nth 0 calculator-stack)) ; an operator | |
1138 | (= 0 (calculator-op-arity ; 0-ary op | |
1139 | (nth 0 calculator-stack)))) | |
1140 | ;; reduce "... op" --> "... r" for 0-ary op | |
1141 | (setq calculator-stack | |
1142 | (cons (calculator-funcall | |
1143 | (nth 2 (nth 0 calculator-stack))) | |
1144 | (nthcdr 1 calculator-stack))) | |
1145 | ;; another iteration | |
1146 | t) | |
1147 | ((and (cdr calculator-stack) ; have two values | |
1148 | (numberp (nth 0 calculator-stack)) ; both numbers | |
1149 | (numberp (nth 1 calculator-stack))) | |
1150 | ;; get rid of redundant numbers: | |
1151 | ;; reduce "... y x" --> "... x" | |
1152 | ;; needed for 0-ary ops that puts more values | |
1153 | (setcdr calculator-stack (cdr (cdr calculator-stack)))) | |
1154 | (t ;; no more iterations | |
1155 | nil)))) | |
1156 | ||
25c269ef DL |
1157 | (defun calculator-funcall (f &optional X Y) |
1158 | "If F is a symbol, evaluate (F X Y). | |
1159 | Otherwise, it should be a list, evaluate it with X, Y bound to the | |
1160 | arguments." | |
1161 | ;; remember binary ops for calculator-repR/L | |
1162 | (if Y (setq calculator-last-opXY (list f X Y))) | |
1163 | (condition-case nil | |
1164 | ;; there used to be code here that returns 0 if the result was | |
1165 | ;; smaller than calculator-epsilon (1e-15). I don't think this is | |
1166 | ;; necessary now. | |
1167 | (if (symbolp f) | |
1168 | (cond ((and X Y) (funcall f X Y)) | |
1169 | (X (funcall f X)) | |
1170 | (t (funcall f))) | |
1171 | ;; f is an expression | |
1172 | (let* ((__f__ f) ; so we can get this value below... | |
1173 | (TX (calculator-truncate X)) | |
1174 | (TY (and Y (calculator-truncate Y))) | |
1175 | (DX (if calculator-deg (/ (* X pi) 180) X)) | |
1176 | (L calculator-saved-list) | |
1177 | (Fbound (fboundp 'F)) | |
1178 | (Fsave (and Fbound (symbol-function 'F))) | |
1179 | (Dbound (fboundp 'D)) | |
1180 | (Dsave (and Dbound (symbol-function 'D)))) | |
1181 | ;; a shortened version of flet | |
1182 | (fset 'F (function | |
1183 | (lambda (&optional x y) | |
1184 | (calculator-funcall __f__ x y)))) | |
1185 | (fset 'D (function | |
1186 | (lambda (x) | |
1187 | (if calculator-deg (/ (* x 180) pi) x)))) | |
1188 | (unwind-protect (eval f) | |
1189 | (if Fbound (fset 'F Fsave) (fmakunbound 'F)) | |
1190 | (if Dbound (fset 'D Dsave) (fmakunbound 'D))))) | |
1191 | (error 0))) | |
1192 | ||
d240a249 GM |
1193 | (eval-when-compile ; silence the compiler |
1194 | (or (fboundp 'event-key) | |
1195 | (defun event-key (&rest _) nil)) | |
1196 | (or (fboundp 'key-press-event-p) | |
1197 | (defun key-press-event-p (&rest _) nil))) | |
1198 | ||
cbb2dddb | 1199 | ;;;--------------------------------------------------------------------- |
25c269ef DL |
1200 | ;;; Input interaction |
1201 | ||
86f1e1ec GM |
1202 | (defun calculator-last-input (&optional keys) |
1203 | "Last char (or event or event sequence) that was read. | |
1204 | Optional string argument KEYS will force using it as the keys entered." | |
1205 | (let ((inp (or keys (this-command-keys)))) | |
d240a249 GM |
1206 | (if (or (stringp inp) (not (arrayp inp))) |
1207 | inp | |
1208 | ;; this translates kp-x to x and [tries to] create a string to | |
1209 | ;; lookup operators | |
1210 | (let* ((i -1) (converted-str (make-string (length inp) ? )) k) | |
1211 | ;; converts an array to a string the ops lookup with keypad | |
1212 | ;; input | |
1213 | (while (< (setq i (1+ i)) (length inp)) | |
1214 | (setq k (aref inp i)) | |
1215 | ;; if Emacs will someday have a event-key, then this would | |
1216 | ;; probably be modified anyway | |
1217 | (and (fboundp 'event-key) (key-press-event-p k) | |
25c269ef | 1218 | (event-key k) (setq k (event-key k))) |
d240a249 GM |
1219 | ;; assume all symbols are translatable with an ascii-character |
1220 | (and (symbolp k) | |
1221 | (setq k (or (get k 'ascii-character) ? ))) | |
1222 | (aset converted-str i k)) | |
1223 | converted-str)))) | |
1224 | ||
1225 | (defun calculator-clear-fragile (&optional op) | |
1226 | "Clear the fragile flag if it was set, then maybe reset all. | |
1227 | OP is the operator (if any) that caused this call." | |
1228 | (if (and calculator-display-fragile | |
1229 | (or (not op) | |
1230 | (= -1 (calculator-op-arity op)) | |
1231 | (= 0 (calculator-op-arity op)))) | |
1232 | ;; reset if last calc finished, and now get a num or prefix or 0-ary | |
25c269ef | 1233 | ;; op |
d240a249 GM |
1234 | (calculator-reset)) |
1235 | (setq calculator-display-fragile nil)) | |
1236 | ||
1237 | (defun calculator-digit () | |
1238 | "Enter a single digit." | |
1239 | (interactive) | |
1240 | (let ((inp (aref (calculator-last-input) 0))) | |
1241 | (if (and (or calculator-display-fragile | |
1242 | (not (numberp (car calculator-stack)))) | |
1243 | (cond | |
1244 | ((not calculator-input-radix) (<= inp ?9)) | |
1245 | ((eq calculator-input-radix 'bin) (<= inp ?1)) | |
1246 | ((eq calculator-input-radix 'oct) (<= inp ?7)) | |
1247 | (t t))) | |
1248 | ;; enter digit if starting a new computation or have an op on the | |
25c269ef | 1249 | ;; stack |
d240a249 GM |
1250 | (progn |
1251 | (calculator-clear-fragile) | |
1252 | (let ((digit (upcase (char-to-string inp)))) | |
1253 | (if (equal calculator-curnum "0") | |
1254 | (setq calculator-curnum nil)) | |
1255 | (setq calculator-curnum | |
1256 | (concat (or calculator-curnum "") digit))) | |
1257 | (calculator-update-display))))) | |
1258 | ||
1259 | (defun calculator-decimal () | |
1260 | "Enter a decimal period." | |
1261 | (interactive) | |
1262 | (if (and (not calculator-input-radix) | |
1263 | (or calculator-display-fragile | |
1264 | (not (numberp (car calculator-stack)))) | |
1265 | (not (and calculator-curnum | |
1266 | (string-match "[.eE]" calculator-curnum)))) | |
1267 | ;; enter the period on the same condition as a digit, only if no | |
25c269ef | 1268 | ;; period or exponent entered yet |
d240a249 GM |
1269 | (progn |
1270 | (calculator-clear-fragile) | |
1271 | (setq calculator-curnum (concat (or calculator-curnum "0") ".")) | |
1272 | (calculator-update-display)))) | |
1273 | ||
1274 | (defun calculator-exp () | |
1275 | "Enter an `E' exponent character, or a digit in hex input mode." | |
1276 | (interactive) | |
1277 | (if calculator-input-radix | |
1278 | (calculator-digit) | |
1279 | (if (and (or calculator-display-fragile | |
1280 | (not (numberp (car calculator-stack)))) | |
1281 | (not (and calculator-curnum | |
1282 | (string-match "[eE]" calculator-curnum)))) | |
25c269ef | 1283 | ;; same condition as above, also no E so far |
d240a249 GM |
1284 | (progn |
1285 | (calculator-clear-fragile) | |
1286 | (setq calculator-curnum (concat (or calculator-curnum "1") "e")) | |
1287 | (calculator-update-display))))) | |
1288 | ||
86f1e1ec GM |
1289 | (defun calculator-op (&optional keys) |
1290 | "Enter an operator on the stack, doing all necessary reductions. | |
1291 | Optional string argument KEYS will force using it as the keys entered." | |
d240a249 | 1292 | (interactive) |
25c269ef DL |
1293 | (catch 'op-error |
1294 | (let* ((last-inp (calculator-last-input keys)) | |
1295 | (op (assoc last-inp calculator-operators))) | |
1296 | (calculator-clear-fragile op) | |
1297 | (if (and calculator-curnum (/= (calculator-op-arity op) 0)) | |
1298 | (setq calculator-stack | |
1299 | (cons (calculator-curnum-value) calculator-stack))) | |
1300 | (setq calculator-curnum nil) | |
1301 | (if (and (= 2 (calculator-op-arity op)) | |
1302 | (not (and calculator-stack | |
1303 | (numberp (nth 0 calculator-stack))))) | |
1304 | ;; we have a binary operator but no number - search for a prefix | |
1305 | ;; version | |
1306 | (let ((rest-ops calculator-operators)) | |
1307 | (while (not (equal last-inp (car (car rest-ops)))) | |
1308 | (setq rest-ops (cdr rest-ops))) | |
1309 | (setq op (assoc last-inp (cdr rest-ops))) | |
1310 | (if (not (and op (= -1 (calculator-op-arity op)))) | |
1311 | ;;(error "Binary operator without a first operand") | |
1312 | (progn | |
1313 | (message "Binary operator without a first operand") | |
1314 | (if calculator-electric-mode | |
1315 | (progn (sit-for 1) (message nil))) | |
1316 | (throw 'op-error nil))))) | |
1317 | (calculator-reduce-stack | |
1318 | (cond ((eq (nth 1 op) '\() 10) | |
1319 | ((eq (nth 1 op) '\)) 0) | |
1320 | (t (calculator-op-prec op)))) | |
1321 | (if (or (and (= -1 (calculator-op-arity op)) | |
1322 | (numberp (car calculator-stack))) | |
1323 | (and (/= (calculator-op-arity op) -1) | |
1324 | (/= (calculator-op-arity op) 0) | |
1325 | (not (numberp (car calculator-stack))))) | |
1326 | ;;(error "Unterminated expression") | |
1327 | (progn | |
1328 | (message "Unterminated expression") | |
1329 | (if calculator-electric-mode | |
1330 | (progn (sit-for 1) (message nil))) | |
1331 | (throw 'op-error nil))) | |
1332 | (setq calculator-stack (cons op calculator-stack)) | |
1333 | (calculator-reduce-stack (calculator-op-prec op)) | |
1334 | (and (= (length calculator-stack) 1) | |
1335 | (numberp (nth 0 calculator-stack)) | |
1336 | ;; the display is fragile if it contains only one number | |
1337 | (setq calculator-display-fragile t) | |
1338 | ;; add number to the saved-list | |
1339 | calculator-add-saved | |
1340 | (if (= 0 calculator-saved-ptr) | |
1341 | (setq calculator-saved-list | |
1342 | (cons (car calculator-stack) calculator-saved-list)) | |
1343 | (let ((p (nthcdr (1- calculator-saved-ptr) | |
1344 | calculator-saved-list))) | |
1345 | (setcdr p (cons (car calculator-stack) (cdr p)))))) | |
1346 | (calculator-update-display)))) | |
d240a249 GM |
1347 | |
1348 | (defun calculator-op-or-exp () | |
1349 | "Either enter an operator or a digit. | |
25c269ef DL |
1350 | Used with +/- for entering them as digits in numbers like 1e-3 (there is |
1351 | no need for negative numbers since these are handled by unary | |
1352 | operators)." | |
d240a249 GM |
1353 | (interactive) |
1354 | (if (and (not calculator-display-fragile) | |
1355 | calculator-curnum | |
1356 | (string-match "[eE]$" calculator-curnum)) | |
1357 | (calculator-digit) | |
1358 | (calculator-op))) | |
1359 | ||
cbb2dddb | 1360 | ;;;--------------------------------------------------------------------- |
25c269ef DL |
1361 | ;;; Input/output modes (not display) |
1362 | ||
d240a249 GM |
1363 | (defun calculator-dec/deg-mode () |
1364 | "Set decimal mode for display & input, if decimal, toggle deg mode." | |
1365 | (interactive) | |
1366 | (if calculator-curnum | |
1367 | (setq calculator-stack | |
1368 | (cons (calculator-curnum-value) calculator-stack))) | |
1369 | (setq calculator-curnum nil) | |
1370 | (if (or calculator-input-radix calculator-output-radix) | |
1371 | (progn (setq calculator-input-radix nil) | |
1372 | (setq calculator-output-radix nil)) | |
1373 | ;; already decimal - toggle degrees mode | |
1374 | (setq calculator-deg (not calculator-deg))) | |
1375 | (calculator-update-display t)) | |
1376 | ||
86f1e1ec GM |
1377 | (defun calculator-radix-mode (&optional keys) |
1378 | "Set input and display radix modes. | |
1379 | Optional string argument KEYS will force using it as the keys entered." | |
d240a249 | 1380 | (interactive) |
86f1e1ec GM |
1381 | (calculator-radix-input-mode keys) |
1382 | (calculator-radix-output-mode keys)) | |
d240a249 | 1383 | |
86f1e1ec GM |
1384 | (defun calculator-radix-input-mode (&optional keys) |
1385 | "Set input radix modes. | |
1386 | Optional string argument KEYS will force using it as the keys entered." | |
d240a249 GM |
1387 | (interactive) |
1388 | (if calculator-curnum | |
1389 | (setq calculator-stack | |
1390 | (cons (calculator-curnum-value) calculator-stack))) | |
1391 | (setq calculator-curnum nil) | |
1392 | (setq calculator-input-radix | |
86f1e1ec | 1393 | (let ((inp (calculator-last-input keys))) |
d240a249 GM |
1394 | (cdr (assq (upcase (aref inp (1- (length inp)))) |
1395 | calculator-char-radix)))) | |
1396 | (calculator-update-display)) | |
1397 | ||
86f1e1ec GM |
1398 | (defun calculator-radix-output-mode (&optional keys) |
1399 | "Set display radix modes. | |
1400 | Optional string argument KEYS will force using it as the keys entered." | |
d240a249 GM |
1401 | (interactive) |
1402 | (if calculator-curnum | |
1403 | (setq calculator-stack | |
1404 | (cons (calculator-curnum-value) calculator-stack))) | |
1405 | (setq calculator-curnum nil) | |
1406 | (setq calculator-output-radix | |
86f1e1ec | 1407 | (let ((inp (calculator-last-input keys))) |
d240a249 GM |
1408 | (cdr (assq (upcase (aref inp (1- (length inp)))) |
1409 | calculator-char-radix)))) | |
1410 | (calculator-update-display t)) | |
1411 | ||
cbb2dddb | 1412 | ;;;--------------------------------------------------------------------- |
25c269ef DL |
1413 | ;;; Saved values list |
1414 | ||
d240a249 GM |
1415 | (defun calculator-save-on-list () |
1416 | "Evaluate current expression, put result on the saved values list." | |
1417 | (interactive) | |
1418 | (let ((calculator-add-saved t)) ; marks the result to be added | |
1419 | (calculator-enter))) | |
1420 | ||
1421 | (defun calculator-clear-saved () | |
1422 | "Clear the list of saved values in `calculator-saved-list'." | |
1423 | (interactive) | |
1424 | (setq calculator-saved-list nil) | |
25c269ef | 1425 | (setq calculator-saved-ptr 0) |
d240a249 GM |
1426 | (calculator-update-display t)) |
1427 | ||
1428 | (defun calculator-saved-move (n) | |
1429 | "Go N elements up the list of saved values." | |
1430 | (interactive) | |
1431 | (and calculator-saved-list | |
1432 | (or (null calculator-stack) calculator-display-fragile) | |
1433 | (progn | |
1434 | (setq calculator-saved-ptr | |
1435 | (max (min (+ n calculator-saved-ptr) | |
1436 | (length calculator-saved-list)) | |
1437 | 0)) | |
1438 | (if (nth calculator-saved-ptr calculator-saved-list) | |
1439 | (setq calculator-stack | |
1440 | (list (nth calculator-saved-ptr calculator-saved-list)) | |
1441 | calculator-display-fragile t) | |
86f1e1ec GM |
1442 | (calculator-reset)) |
1443 | (calculator-update-display)))) | |
d240a249 GM |
1444 | |
1445 | (defun calculator-saved-up () | |
1446 | "Go up the list of saved values." | |
1447 | (interactive) | |
1448 | (calculator-saved-move +1)) | |
1449 | ||
1450 | (defun calculator-saved-down () | |
1451 | "Go down the list of saved values." | |
1452 | (interactive) | |
1453 | (calculator-saved-move -1)) | |
1454 | ||
cbb2dddb | 1455 | ;;;--------------------------------------------------------------------- |
25c269ef DL |
1456 | ;;; Misc functions |
1457 | ||
d240a249 GM |
1458 | (defun calculator-open-paren () |
1459 | "Equivalents of `(' use this." | |
1460 | (interactive) | |
86f1e1ec | 1461 | (calculator-op "(")) |
d240a249 GM |
1462 | |
1463 | (defun calculator-close-paren () | |
1464 | "Equivalents of `)' use this." | |
1465 | (interactive) | |
86f1e1ec | 1466 | (calculator-op ")")) |
d240a249 GM |
1467 | |
1468 | (defun calculator-enter () | |
86f1e1ec | 1469 | "Evaluate current expression." |
d240a249 | 1470 | (interactive) |
86f1e1ec | 1471 | (calculator-op "=")) |
d240a249 GM |
1472 | |
1473 | (defun calculator-backspace () | |
1474 | "Backward delete a single digit or a stack element." | |
1475 | (interactive) | |
1476 | (if calculator-curnum | |
1477 | (setq calculator-curnum | |
1478 | (if (> (length calculator-curnum) 1) | |
1479 | (substring calculator-curnum | |
1480 | 0 (1- (length calculator-curnum))) | |
1481 | nil)) | |
1482 | (setq calculator-stack (cdr calculator-stack))) | |
1483 | (calculator-update-display)) | |
1484 | ||
1485 | (defun calculator-clear () | |
1486 | "Clear current number." | |
1487 | (interactive) | |
1488 | (setq calculator-curnum nil) | |
1489 | (cond | |
1490 | ;; if the current number is from the saved-list - remove it | |
1491 | ((and calculator-display-fragile | |
1492 | calculator-saved-list | |
1493 | (= (car calculator-stack) | |
1494 | (nth calculator-saved-ptr calculator-saved-list))) | |
1495 | (if (= 0 calculator-saved-ptr) | |
1496 | (setq calculator-saved-list (cdr calculator-saved-list)) | |
1497 | (let ((p (nthcdr (1- calculator-saved-ptr) | |
1498 | calculator-saved-list))) | |
1499 | (setcdr p (cdr (cdr p))) | |
1500 | (setq calculator-saved-ptr (1- calculator-saved-ptr)))) | |
1501 | (if calculator-saved-list | |
1502 | (setq calculator-stack | |
1503 | (list (nth calculator-saved-ptr calculator-saved-list))) | |
1504 | (calculator-reset))) | |
1505 | ;; reset if fragile or double clear | |
1506 | ((or calculator-display-fragile (eq last-command this-command)) | |
1507 | (calculator-reset))) | |
1508 | (calculator-update-display)) | |
1509 | ||
1510 | (defun calculator-copy () | |
1511 | "Copy current number to the `kill-ring'." | |
1512 | (interactive) | |
1513 | (calculator-enter) | |
25c269ef | 1514 | ;; remove trailing spaces and and an index |
d240a249 | 1515 | (let ((s (cdr calculator-stack-display))) |
25c269ef | 1516 | (if (string-match "^\\([^ ]+\\) *\\(\\[[0-9/]+\\]\\)? *$" s) |
d240a249 GM |
1517 | (setq s (match-string 1 s))) |
1518 | (kill-new s))) | |
1519 | ||
1520 | (defun calculator-set-register (reg) | |
1521 | "Set a register value for REG." | |
1522 | (interactive "cRegister to store into: ") | |
1523 | (let* ((as (assq reg calculator-registers)) | |
1524 | (val (progn (calculator-enter) (car calculator-stack)))) | |
1525 | (if as | |
1526 | (setcdr as val) | |
1527 | (setq calculator-registers | |
1528 | (cons (cons reg val) calculator-registers))) | |
1529 | (message (format "[%c] := %S" reg val)))) | |
1530 | ||
1531 | (defun calculator-put-value (val) | |
1532 | "Paste VAL as if entered. | |
1533 | Used by `calculator-paste' and `get-register'." | |
1534 | (if (and (numberp val) | |
1535 | ;; (not calculator-curnum) | |
1536 | (or calculator-display-fragile | |
1537 | (not (numberp (car calculator-stack))))) | |
1538 | (progn | |
1539 | (calculator-clear-fragile) | |
1540 | (setq calculator-curnum (calculator-num-to-string val)) | |
1541 | (calculator-update-display)))) | |
1542 | ||
1543 | (defun calculator-paste () | |
1544 | "Paste a value from the `kill-ring'." | |
1545 | (interactive) | |
1546 | (calculator-put-value | |
25c269ef | 1547 | (let ((str (current-kill 0))) |
cbb2dddb GM |
1548 | (and calculator-paste-decimals |
1549 | (string-match "\\([0-9]+\\)\\(\\.[0-9]+\\)?\\(e[0-9]+\\)?" | |
1550 | str) | |
1551 | (or (match-string 1 str) | |
1552 | (match-string 2 str) | |
1553 | (match-string 3 str)) | |
1554 | (setq str (concat (match-string 1 str) | |
1555 | (or (match-string 2 str) ".0") | |
1556 | (match-string 3 str)))) | |
25c269ef DL |
1557 | (condition-case nil (car (read-from-string str)) |
1558 | (error nil))))) | |
d240a249 GM |
1559 | |
1560 | (defun calculator-get-register (reg) | |
1561 | "Get a value from a register REG." | |
1562 | (interactive "cRegister to get value from: ") | |
1563 | (calculator-put-value (cdr (assq reg calculator-registers)))) | |
1564 | ||
1565 | (defun calculator-help () | |
1566 | ;; this is used as the quick reference screen you get with `h' | |
1567 | "Quick reference: | |
1568 | * numbers/operators/parens/./e - enter expressions | |
1569 | + - * / \\(div) %(rem) _(-X,postfix) ;(1/X,postfix) ^(exp) L(og) | |
1570 | Q(sqrt) !(fact) S(in) C(os) T(an) |(or) #(xor) &(and) ~(not) | |
1571 | * >/< repeats last binary operation with its 2nd (1st) arg as postfix op | |
25c269ef DL |
1572 | * I inverses next trig function * '/\"/{} - display/display args |
1573 | * D - switch to all-decimal, or toggle deg/rad mode | |
d240a249 GM |
1574 | * B/O/H/X - binary/octal/hex mode for i/o (X is a shortcut for H) |
1575 | * i/o - prefix for d/b/o/x - set only input/output modes | |
1576 | * enter/= - evaluate current expr. * s/g - set/get a register | |
1577 | * space - evaluate & save on list * l/v - list total/average | |
1578 | * up/down/C-p/C-n - browse saved * C-delete - clear all saved | |
86f1e1ec | 1579 | * C-insert - copy whole expr. * C-return - evaluate, copy, exit |
d240a249 GM |
1580 | * insert - paste a number * backspace- delete backwards |
1581 | * delete - clear argument or list value or whole expression (twice) | |
1582 | * escape/q - exit." | |
1583 | (interactive) | |
1584 | (if (eq last-command 'calculator-help) | |
1585 | (let ((mode-name "Calculator") | |
1586 | (major-mode 'calculator-mode) | |
1587 | (g-map (current-global-map)) | |
1588 | (win (selected-window))) | |
1589 | (require 'ehelp) | |
1590 | (if calculator-electric-mode | |
1591 | (use-global-map calculator-saved-global-map)) | |
cbb2dddb GM |
1592 | (if (or (not calculator-electric-mode) |
1593 | ;; XEmacs has a problem with electric-describe-mode | |
1594 | (string-match "XEmacs" (emacs-version))) | |
1595 | (describe-mode) | |
1596 | (electric-describe-mode)) | |
d240a249 GM |
1597 | (if calculator-electric-mode |
1598 | (use-global-map g-map)) | |
1599 | (select-window win) ; these are for XEmacs (also below) | |
1600 | (message nil)) | |
1601 | (let ((one (one-window-p t)) | |
1602 | (win (selected-window)) | |
1603 | (help-buf (get-buffer-create "*Help*"))) | |
1604 | (save-window-excursion | |
1605 | (with-output-to-temp-buffer "*Help*" | |
1606 | (princ (documentation 'calculator-help))) | |
1607 | (if one | |
1608 | (shrink-window-if-larger-than-buffer | |
1609 | (get-buffer-window help-buf))) | |
1610 | (message | |
1611 | "`%s' again for more help, any other key continues normally." | |
1612 | (calculator-last-input)) | |
1613 | (select-window win) | |
1614 | (sit-for 360)) | |
1615 | (select-window win)))) | |
1616 | ||
1617 | (defun calculator-quit () | |
1618 | "Quit calculator." | |
1619 | (interactive) | |
1620 | (set-buffer calculator-buffer) | |
1621 | (let ((inhibit-read-only t)) (erase-buffer)) | |
1622 | (if (not calculator-electric-mode) | |
1623 | (progn | |
1624 | (condition-case nil | |
1625 | (while (get-buffer-window calculator-buffer) | |
1626 | (delete-window (get-buffer-window calculator-buffer))) | |
1627 | (error nil)) | |
1628 | (kill-buffer calculator-buffer))) | |
1629 | (setq calculator-buffer nil) | |
1630 | (message "Calculator done.") | |
1631 | (if calculator-electric-mode (throw 'calculator-done nil))) | |
1632 | ||
1633 | (defun calculator-save-and-quit () | |
1634 | "Quit the calculator, saving the result on the `kill-ring'." | |
1635 | (interactive) | |
1636 | (calculator-enter) | |
1637 | (calculator-copy) | |
1638 | (calculator-quit)) | |
1639 | ||
d240a249 GM |
1640 | (defun calculator-repR (x) |
1641 | "Repeats the last binary operation with its second argument and X. | |
1642 | To use this, apply a binary operator (evaluate it), then call this." | |
1643 | (if calculator-last-opXY | |
1644 | ;; avoid rebinding calculator-last-opXY | |
1645 | (let ((calculator-last-opXY calculator-last-opXY)) | |
1646 | (calculator-funcall | |
1647 | (car calculator-last-opXY) x (nth 2 calculator-last-opXY))) | |
1648 | x)) | |
1649 | ||
1650 | (defun calculator-repL (x) | |
1651 | "Repeats the last binary operation with its first argument and X. | |
1652 | To use this, apply a binary operator (evaluate it), then call this." | |
1653 | (if calculator-last-opXY | |
1654 | ;; avoid rebinding calculator-last-opXY | |
1655 | (let ((calculator-last-opXY calculator-last-opXY)) | |
1656 | (calculator-funcall | |
1657 | (car calculator-last-opXY) (nth 1 calculator-last-opXY) x)) | |
1658 | x)) | |
1659 | ||
1660 | (defun calculator-fact (x) | |
1661 | "Simple factorial of X." | |
1662 | (let ((r (if (<= x 10) 1 1.0))) | |
1663 | (while (> x 0) | |
1664 | (setq r (* r (truncate x))) | |
1665 | (setq x (1- x))) | |
1666 | r)) | |
1667 | ||
1668 | (defun calculator-truncate (n) | |
1669 | "Truncate N, return 0 in case of overflow." | |
1670 | (condition-case nil (truncate n) (error 0))) | |
1671 | ||
1672 | ||
1673 | (provide 'calculator) | |
1674 | ||
1675 | ;;; calculator.el ends here |