HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| 5335a8ce | 1 | ;;; calculator.el --- a calculator for Emacs -*- lexical-binding: t -*- |
| d240a249 | 2 | |
| ba318903 | 3 | ;; Copyright (C) 1998, 2000-2014 Free Software Foundation, Inc. |
| d240a249 | 4 | |
| 4ece8d61 | 5 | ;; Author: Eli Barzilay <eli@barzilay.org> |
| d240a249 | 6 | ;; Keywords: tools, convenience |
| d240a249 GM |
7 | |
| 8 | ;; This file is part of GNU Emacs. | |
| 9 | ||
| eb3fa2cf GM |
10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
| 11 | ;; it under the terms of the GNU General Public License as published by | |
| 12 | ;; the Free Software Foundation, either version 3 of the License, or | |
| 13 | ;; (at your option) any later version. | |
| d240a249 | 14 | |
| eb3fa2cf GM |
15 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 18 | ;; GNU General Public License for more details. | |
| d240a249 GM |
19 | |
| 20 | ;; You should have received a copy of the GNU General Public License | |
| eb3fa2cf | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
| d240a249 | 22 | |
| cbb2dddb | 23 | ;;;===================================================================== |
| d240a249 GM |
24 | ;;; Commentary: |
| 25 | ;; | |
| 25c269ef | 26 | ;; A calculator for Emacs. |
| 5ca425fc | 27 | ;; Why should you reach for your mouse to get xcalc (calc.exe, gcalc or |
| 25c269ef | 28 | ;; whatever), when you have Emacs running already? |
| d240a249 GM |
29 | ;; |
| 30 | ;; If this is not part of your Emacs distribution, then simply bind | |
| 31 | ;; `calculator' to a key and make it an autoloaded function, e.g.: | |
| 32 | ;; (autoload 'calculator "calculator" | |
| 25c269ef | 33 | ;; "Run the Emacs calculator." t) |
| d240a249 GM |
34 | ;; (global-set-key [(control return)] 'calculator) |
| 35 | ;; | |
| 5335a8ce | 36 | ;; Written by Eli Barzilay, eli@barzilay.org |
| d240a249 | 37 | ;; |
| d240a249 | 38 | |
| cbb2dddb | 39 | ;;;===================================================================== |
| d240a249 GM |
40 | ;;; Customization: |
| 41 | ||
| 42 | (defgroup calculator nil | |
| 25c269ef | 43 | "Simple Emacs calculator." |
| d240a249 | 44 | :prefix "calculator" |
| 7def2f92 | 45 | :version "21.1" |
| d240a249 | 46 | :group 'tools |
| eba5b4dd | 47 | :group 'applications) |
| d240a249 GM |
48 | |
| 49 | (defcustom calculator-electric-mode nil | |
| 9201cc28 | 50 | "Run `calculator' electrically, in the echo area. |
| 25c269ef DL |
51 | Electric mode saves some place but changes the way you interact with the |
| 52 | calculator." | |
| d240a249 GM |
53 | :type 'boolean |
| 54 | :group 'calculator) | |
| 55 | ||
| 86f1e1ec | 56 | (defcustom calculator-use-menu t |
| 9201cc28 | 57 | "Make `calculator' create a menu. |
| 86f1e1ec GM |
58 | Note that this requires easymenu. Must be set before loading." |
| 59 | :type 'boolean | |
| 60 | :group 'calculator) | |
| 61 | ||
| d240a249 | 62 | (defcustom calculator-bind-escape nil |
| 9201cc28 | 63 | "If non-nil, set escape to exit the calculator." |
| d240a249 GM |
64 | :type 'boolean |
| 65 | :group 'calculator) | |
| 66 | ||
| 67 | (defcustom calculator-unary-style 'postfix | |
| 9201cc28 | 68 | "Value is either 'prefix or 'postfix. |
| d240a249 GM |
69 | This determines the default behavior of unary operators." |
| 70 | :type '(choice (const prefix) (const postfix)) | |
| 71 | :group 'calculator) | |
| 72 | ||
| 25c269ef | 73 | (defcustom calculator-prompt "Calc=%s> " |
| 9201cc28 | 74 | "The prompt used by the Emacs calculator. |
| 5335a8ce | 75 | It should contain a \"%s\" somewhere that will indicate the i/o radixes; |
| bd9bb96e JB |
76 | this will be a two-character string as described in the documentation |
| 77 | for `calculator-mode'." | |
| d240a249 GM |
78 | :type 'string |
| 79 | :group 'calculator) | |
| 80 | ||
| 25c269ef | 81 | (defcustom calculator-number-digits 3 |
| 9201cc28 | 82 | "The calculator's number of digits used for standard display. |
| 25c269ef DL |
83 | Used by the `calculator-standard-display' function - it will use the |
| 84 | format string \"%.NC\" where this number is N and C is a character given | |
| 85 | at runtime." | |
| 2826ac81 | 86 | :type 'integer |
| d240a249 GM |
87 | :group 'calculator) |
| 88 | ||
| 761d3eb3 | 89 | (defcustom calculator-radix-grouping-mode t |
| 9201cc28 | 90 | "Use digit grouping in radix output mode. |
| 761d3eb3 RS |
91 | If this is set, chunks of `calculator-radix-grouping-digits' characters |
| 92 | will be separated by `calculator-radix-grouping-separator' when in radix | |
| f5307782 JB |
93 | output mode is active (determined by `calculator-output-radix')." |
| 94 | :type 'boolean | |
| 95 | :group 'calculator) | |
| 761d3eb3 RS |
96 | |
| 97 | (defcustom calculator-radix-grouping-digits 4 | |
| 9201cc28 | 98 | "The number of digits used for grouping display in radix modes. |
| f5307782 JB |
99 | See `calculator-radix-grouping-mode'." |
| 100 | :type 'integer | |
| 101 | :group 'calculator) | |
| 761d3eb3 RS |
102 | |
| 103 | (defcustom calculator-radix-grouping-separator "'" | |
| 9201cc28 | 104 | "The separator used in radix grouping display. |
| f5307782 JB |
105 | See `calculator-radix-grouping-mode'." |
| 106 | :type 'string | |
| 107 | :group 'calculator) | |
| 761d3eb3 | 108 | |
| 25c269ef | 109 | (defcustom calculator-remove-zeros t |
| 9201cc28 | 110 | "Non-nil value means delete all redundant zero decimal digits. |
| 5335a8ce EB |
111 | If this value is not t and not nil, redundant zeros are removed except |
| 112 | for one. | |
| 25c269ef DL |
113 | Used by the `calculator-remove-zeros' function." |
| 114 | :type '(choice (const t) (const leave-decimal) (const nil)) | |
| d240a249 GM |
115 | :group 'calculator) |
| 116 | ||
| 25c269ef | 117 | (defcustom calculator-displayer '(std ?n) |
| 9201cc28 | 118 | "A displayer specification for numerical values. |
| 25c269ef DL |
119 | This is the displayer used to show all numbers in an expression. Result |
| 120 | values will be displayed according to the first element of | |
| 121 | `calculator-displayers'. | |
| 122 | ||
| 123 | The displayer is a symbol, a string or an expression. A symbol should | |
| 124 | be the name of a one-argument function, a string is used with a single | |
| 125 | argument and an expression will be evaluated with the variable `num' | |
| 126 | bound to whatever should be displayed. If it is a function symbol, it | |
| 40f7e0e8 SM |
127 | should be able to handle special symbol arguments, currently `left' and |
| 128 | `right' which will be sent by special keys to modify display parameters | |
| 25c269ef DL |
129 | associated with the displayer function (for example to change the number |
| 130 | of digits displayed). | |
| 131 | ||
| 5335a8ce EB |
132 | An exception to the above is the case of the list (std C [G]) where C is |
| 133 | a character and G is an optional boolean, in this case the | |
| 134 | `calculator-standard-displayer' function will be used with these as | |
| 135 | arguments." | |
| 136 | :type '(choice (function) (string) (sexp) | |
| 137 | (list (const std) character) | |
| 138 | (list (const std) character boolean)) | |
| f5307782 | 139 | :group 'calculator) |
| 25c269ef DL |
140 | |
| 141 | (defcustom calculator-displayers | |
| 2188f2d4 | 142 | '(((std ?n) "Standard display, decimal point or scientific") |
| 25c269ef | 143 | (calculator-eng-display "Eng display") |
| 5335a8ce | 144 | ((std ?f t) "Standard display, decimal point with grouping") |
| 2188f2d4 | 145 | ((std ?e) "Standard display, scientific") |
| 25c269ef | 146 | ("%S" "Emacs printer")) |
| 9201cc28 | 147 | "A list of displayers. |
| 25c269ef | 148 | Each element is a list of a displayer and a description string. The |
| 5335a8ce EB |
149 | first element is the one which is currently used, this is for the |
| 150 | display of result values not values in expressions. A displayer | |
| 151 | specification is the same as the values that can be stored in | |
| 152 | `calculator-displayer'. | |
| 25c269ef DL |
153 | |
| 154 | `calculator-rotate-displayer' rotates this list." | |
| 155 | :type 'sexp | |
| d240a249 GM |
156 | :group 'calculator) |
| 157 | ||
| 25c269ef | 158 | (defcustom calculator-paste-decimals t |
| 9201cc28 | 159 | "If non-nil, convert pasted integers so they have a decimal point. |
| 25c269ef DL |
160 | This makes it possible to paste big integers since they will be read as |
| 161 | floats, otherwise the Emacs reader will fail on them." | |
| d240a249 GM |
162 | :type 'boolean |
| 163 | :group 'calculator) | |
| 164 | ||
| 4351784f | 165 | (defcustom calculator-copy-displayer nil |
| 9201cc28 | 166 | "If non-nil, this is any value that can be used for |
| 4351784f GM |
167 | `calculator-displayer', to format a string before copying it with |
| 168 | `calculator-copy'. If nil, then `calculator-displayer's normal value is | |
| f5307782 JB |
169 | used." |
| 170 | :type 'boolean | |
| 171 | :group 'calculator) | |
| 4351784f | 172 | |
| d240a249 | 173 | (defcustom calculator-2s-complement nil |
| 9201cc28 | 174 | "If non-nil, show negative numbers in 2s complement in radix modes. |
| d240a249 GM |
175 | Otherwise show as a negative number." |
| 176 | :type 'boolean | |
| 177 | :group 'calculator) | |
| 178 | ||
| 179 | (defcustom calculator-mode-hook nil | |
| 9201cc28 | 180 | "List of hook functions for `calculator-mode' to run. |
| 761d3eb3 | 181 | Note: if `calculator-electric-mode' is on, then this hook will get |
| 5335a8ce | 182 | activated in the minibuffer -- in that case it should not do much more |
| 761d3eb3 RS |
183 | than local key settings and other effects that will change things |
| 184 | outside the scope of calculator related code." | |
| d240a249 GM |
185 | :type 'hook |
| 186 | :group 'calculator) | |
| 187 | ||
| 188 | (defcustom calculator-user-registers nil | |
| 9201cc28 | 189 | "An association list of user-defined register bindings. |
| d240a249 GM |
190 | Each element in this list is a list of a character and a number that |
| 191 | will be stored in that character's register. | |
| 192 | ||
| 193 | For example, use this to define the golden ratio number: | |
| 25c269ef DL |
194 | (setq calculator-user-registers '((?g . 1.61803398875))) |
| 195 | before you load calculator." | |
| d240a249 | 196 | :type '(repeat (cons character number)) |
| 4f91a816 SM |
197 | :set (lambda (_ val) |
| 198 | (and (boundp 'calculator-registers) | |
| 199 | (setq calculator-registers | |
| 200 | (append val calculator-registers))) | |
| 201 | (setq calculator-user-registers val)) | |
| d240a249 GM |
202 | :group 'calculator) |
| 203 | ||
| 204 | (defcustom calculator-user-operators nil | |
| 9201cc28 | 205 | "A list of additional operators. |
| d240a249 GM |
206 | This is a list in the same format as specified in the documentation for |
| 207 | `calculator-operators', that you can use to bind additional calculator | |
| 208 | operators. It is probably not a good idea to modify this value with | |
| 209 | `customize' since it is too complex... | |
| 210 | ||
| 211 | Examples: | |
| 212 | ||
| 7def2f92 DL |
213 | * A very simple one, adding a postfix \"x-to-y\" conversion keys, using |
| 214 | t as a prefix key: | |
| d240a249 GM |
215 | |
| 216 | (setq calculator-user-operators | |
| 217 | '((\"tf\" cl-to-fr (+ 32 (/ (* X 9) 5)) 1) | |
| 218 | (\"tc\" fr-to-cl (/ (* (- X 32) 5) 9) 1) | |
| 219 | (\"tp\" kg-to-lb (/ X 0.453592) 1) | |
| 220 | (\"tk\" lb-to-kg (* X 0.453592) 1) | |
| 221 | (\"tF\" mt-to-ft (/ X 0.3048) 1) | |
| 222 | (\"tM\" ft-to-mt (* X 0.3048) 1))) | |
| 223 | ||
| 5335a8ce EB |
224 | * Using a function-like form is very simple: use `X' for the argument |
| 225 | (`Y' for the second in case of a binary operator), `TX' is a truncated | |
| 226 | version of `X' and `F' for a recursive call. Here is a [very | |
| 227 | inefficient] Fibonacci number calculation: | |
| d240a249 GM |
228 | |
| 229 | (add-to-list 'calculator-user-operators | |
| 5335a8ce EB |
230 | '(\"F\" fib |
| 231 | (if (<= TX 1) 1 (+ (F (- TX 1)) (F (- TX 2)))))) | |
| d240a249 GM |
232 | |
| 233 | Note that this will be either postfix or prefix, according to | |
| 234 | `calculator-unary-style'." | |
| 235 | :type '(repeat (list string symbol sexp integer integer)) | |
| 236 | :group 'calculator) | |
| 237 | ||
| cbb2dddb | 238 | ;;;===================================================================== |
| d240a249 GM |
239 | ;;; Code: |
| 240 | ||
| 40f7e0e8 SM |
241 | (eval-when-compile (require 'cl-lib)) |
| 242 | ||
| cbb2dddb | 243 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
244 | ;;; Variables |
| 245 | ||
| d240a249 | 246 | (defvar calculator-initial-operators |
| 5335a8ce | 247 | '(;; "+"/"-" have keybindings of their own, not calculator-ops |
| 86f1e1ec | 248 | ("=" = identity 1 -1) |
| 25c269ef DL |
249 | (nobind "+" + + 2 4) |
| 250 | (nobind "-" - - 2 4) | |
| 251 | (nobind "+" + + -1 9) | |
| 252 | (nobind "-" - - -1 9) | |
| 86f1e1ec GM |
253 | ("(" \( identity -1 -1) |
| 254 | (")" \) identity +1 10) | |
| d240a249 GM |
255 | ;; normal keys |
| 256 | ("|" or (logior TX TY) 2 2) | |
| 257 | ("#" xor (logxor TX TY) 2 2) | |
| 258 | ("&" and (logand TX TY) 2 3) | |
| 259 | ("*" * * 2 5) | |
| 260 | ("/" / / 2 5) | |
| 261 | ("\\" div (/ TX TY) 2 5) | |
| 262 | ("%" rem (% TX TY) 2 5) | |
| 263 | ("L" log log 2 6) | |
| 264 | ("S" sin (sin DX) x 6) | |
| 265 | ("C" cos (cos DX) x 6) | |
| 266 | ("T" tan (tan DX) x 6) | |
| 267 | ("IS" asin (D (asin X)) x 6) | |
| 268 | ("IC" acos (D (acos X)) x 6) | |
| 269 | ("IT" atan (D (atan X)) x 6) | |
| 270 | ("Q" sqrt sqrt x 7) | |
| f50347a9 | 271 | ("^" ^ calculator-expt 2 7) |
| d240a249 GM |
272 | ("!" ! calculator-fact x 7) |
| 273 | (";" 1/ (/ 1 X) 1 7) | |
| 274 | ("_" - - 1 8) | |
| 275 | ("~" ~ (lognot TX) x 8) | |
| 276 | (">" repR calculator-repR 1 8) | |
| 277 | ("<" repL calculator-repL 1 8) | |
| 278 | ("v" avg (/ (apply '+ L) (length L)) 0 8) | |
| 279 | ("l" tot (apply '+ L) 0 8) | |
| 280 | ) | |
| 281 | "A list of initial operators. | |
| d240a249 GM |
282 | This is a list in the same format as `calculator-operators'. Whenever |
| 283 | `calculator' starts, it looks at the value of this variable, and if it | |
| 284 | is not empty, its contents is prepended to `calculator-operators' and | |
| 285 | the appropriate key bindings are made. | |
| 286 | ||
| 287 | This variable is then reset to nil. Don't use this if you want to add | |
| 288 | user-defined operators, use `calculator-user-operators' instead.") | |
| 289 | ||
| 290 | (defvar calculator-operators nil | |
| 291 | "The calculator operators, each a list with: | |
| 292 | ||
| 293 | 1. The key that is bound to for this operation (usually a string); | |
| 294 | ||
| 295 | 2. The displayed symbol for this function; | |
| 296 | ||
| 297 | 3. The function symbol, or a form that uses the variables `X' and `Y', | |
| 298 | (if it is a binary operator), `TX' and `TY' (truncated integer | |
| 299 | versions), `DX' (converted to radians if degrees mode is on), `D' | |
| 300 | (function for converting radians to degrees if deg mode is on), `L' | |
| 301 | (list of saved values), `F' (function for recursive iteration calls) | |
| 5335a8ce | 302 | and evaluates to the function value -- these variables are capital; |
| d240a249 | 303 | |
| 25c269ef | 304 | 4. The function's arity, optional, one of: 2 => binary, -1 => prefix |
| 5335a8ce EB |
305 | unary, +1 => postfix unary, 0 => a 0-arg operator func (note that |
| 306 | using such a function replaces the currently entered number, if any), | |
| 307 | non-number (the default) => postfix or prefix as determined by | |
| 308 | `calculator-unary-style'; | |
| d240a249 | 309 | |
| 5335a8ce | 310 | 5. The function's precedence -- should be in the range of 1 (lowest) to |
| 25c269ef | 311 | 9 (highest) (optional, defaults to 1); |
| d240a249 GM |
312 | |
| 313 | It it possible have a unary prefix version of a binary operator if it | |
| 314 | comes later in this list. If the list begins with the symbol 'nobind, | |
| 5335a8ce | 315 | then no key binding will take place -- this is only useful for predefined |
| d240a249 GM |
316 | keys. |
| 317 | ||
| 318 | Use `calculator-user-operators' to add operators to this list, see its | |
| 319 | documentation for an example.") | |
| 320 | ||
| 321 | (defvar calculator-stack nil | |
| 5335a8ce | 322 | "Stack contents -- operations and operands.") |
| d240a249 GM |
323 | |
| 324 | (defvar calculator-curnum nil | |
| 325 | "Current number being entered (as a string).") | |
| 326 | ||
| 327 | (defvar calculator-stack-display nil | |
| 328 | "Cons of the stack and its string representation.") | |
| 329 | ||
| 330 | (defvar calculator-char-radix | |
| 331 | '((?D . nil) (?B . bin) (?O . oct) (?H . hex) (?X . hex)) | |
| 332 | "A table to convert input characters to corresponding radix symbols.") | |
| 333 | ||
| 334 | (defvar calculator-output-radix nil | |
| 335 | "The mode for display, one of: nil (decimal), 'bin, 'oct or 'hex.") | |
| 336 | ||
| 337 | (defvar calculator-input-radix nil | |
| 338 | "The mode for input, one of: nil (decimal), 'bin, 'oct or 'hex.") | |
| 339 | ||
| 340 | (defvar calculator-deg nil | |
| 341 | "Non-nil if trig functions operate on degrees instead of radians.") | |
| 342 | ||
| 343 | (defvar calculator-saved-list nil | |
| 344 | "A list of saved values collected.") | |
| 345 | ||
| 346 | (defvar calculator-saved-ptr 0 | |
| 347 | "The pointer to the current saved number.") | |
| 348 | ||
| 349 | (defvar calculator-add-saved nil | |
| 350 | "Bound to t when a value should be added to the saved-list.") | |
| 351 | ||
| 352 | (defvar calculator-display-fragile nil | |
| 353 | "When non-nil, we see something that the next digit should replace.") | |
| 354 | ||
| 355 | (defvar calculator-buffer nil | |
| 356 | "The current calculator buffer.") | |
| 357 | ||
| 25c269ef DL |
358 | (defvar calculator-eng-extra nil |
| 359 | "Internal value used by `calculator-eng-display'.") | |
| 360 | ||
| 361 | (defvar calculator-eng-tmp-show nil | |
| 362 | "Internal value used by `calculator-eng-display'.") | |
| 363 | ||
| d240a249 GM |
364 | (defvar calculator-last-opXY nil |
| 365 | "The last binary operation and its arguments. | |
| 366 | Used for repeating operations in calculator-repR/L.") | |
| 367 | ||
| 368 | (defvar calculator-registers ; use user-bindings first | |
| 9e0d4f9e SM |
369 | (append calculator-user-registers |
| 370 | (list (cons ?e float-e) (cons ?p float-pi))) | |
| d240a249 GM |
371 | "The association list of calculator register values.") |
| 372 | ||
| 373 | (defvar calculator-saved-global-map nil | |
| 374 | "Saved global key map.") | |
| 375 | ||
| 86f1e1ec | 376 | (defvar calculator-restart-other-mode nil |
| 25c269ef DL |
377 | "Used to hack restarting with the electric mode changed.") |
| 378 | ||
| cbb2dddb | 379 | ;;;--------------------------------------------------------------------- |
| 25c269ef | 380 | ;;; Key bindings |
| 86f1e1ec | 381 | |
| 4d789d84 | 382 | (defvar calculator-mode-map |
| 86f1e1ec | 383 | (let ((map (make-sparse-keymap))) |
| d240a249 GM |
384 | (suppress-keymap map t) |
| 385 | (define-key map "i" nil) | |
| 386 | (define-key map "o" nil) | |
| 86f1e1ec | 387 | (let ((p |
| 25c269ef DL |
388 | '((calculator-open-paren "[") |
| 389 | (calculator-close-paren "]") | |
| 390 | (calculator-op-or-exp "+" "-" [kp-add] [kp-subtract]) | |
| 391 | (calculator-digit "0" "1" "2" "3" "4" "5" "6" "7" "8" | |
| 392 | "9" "a" "b" "c" "d" "f" | |
| 393 | [kp-0] [kp-1] [kp-2] [kp-3] [kp-4] | |
| 394 | [kp-5] [kp-6] [kp-7] [kp-8] [kp-9]) | |
| 395 | (calculator-op [kp-divide] [kp-multiply]) | |
| 396 | (calculator-decimal "." [kp-decimal]) | |
| 397 | (calculator-exp "e") | |
| 86f1e1ec GM |
398 | (calculator-dec/deg-mode "D") |
| 399 | (calculator-set-register "s") | |
| 400 | (calculator-get-register "g") | |
| 401 | (calculator-radix-mode "H" "X" "O" "B") | |
| 402 | (calculator-radix-input-mode "id" "ih" "ix" "io" "ib" | |
| 403 | "iD" "iH" "iX" "iO" "iB") | |
| 404 | (calculator-radix-output-mode "od" "oh" "ox" "oo" "ob" | |
| 405 | "oD" "oH" "oX" "oO" "oB") | |
| 25c269ef DL |
406 | (calculator-rotate-displayer "'") |
| 407 | (calculator-rotate-displayer-back "\"") | |
| 761d3eb3 | 408 | (calculator-displayer-prev "{") |
| 4351784f | 409 | (calculator-displayer-next "}") |
| 86f1e1ec GM |
410 | (calculator-saved-up [up] [?\C-p]) |
| 411 | (calculator-saved-down [down] [?\C-n]) | |
| 412 | (calculator-quit "q" [?\C-g]) | |
| 25c269ef DL |
413 | (calculator-enter [enter] [linefeed] [kp-enter] |
| 414 | [return] [?\r] [?\n]) | |
| 86f1e1ec GM |
415 | (calculator-save-on-list " " [space]) |
| 416 | (calculator-clear-saved [?\C-c] [(control delete)]) | |
| 417 | (calculator-save-and-quit [(control return)] | |
| 418 | [(control kp-enter)]) | |
| cbb2dddb | 419 | (calculator-paste [insert] [(shift insert)] |
| 761d3eb3 | 420 | [paste] [mouse-2] [?\C-y]) |
| 86f1e1ec GM |
421 | (calculator-clear [delete] [?\C-?] [?\C-d]) |
| 422 | (calculator-help [?h] [??] [f1] [help]) | |
| 761d3eb3 | 423 | (calculator-copy [(control insert)] [copy]) |
| 86f1e1ec GM |
424 | (calculator-backspace [backspace]) |
| 425 | ))) | |
| d240a249 | 426 | (while p |
| 5335a8ce EB |
427 | ;; reverse the keys so earlier definitions come last -- makes |
| 428 | ;; the more sensible bindings visible in the menu | |
| 429 | (let ((func (caar p)) (keys (reverse (cdar p)))) | |
| 86f1e1ec GM |
430 | (while keys |
| 431 | (define-key map (car keys) func) | |
| 432 | (setq keys (cdr keys)))) | |
| d240a249 GM |
433 | (setq p (cdr p)))) |
| 434 | (if calculator-bind-escape | |
| 435 | (progn (define-key map [?\e] 'calculator-quit) | |
| 436 | (define-key map [escape] 'calculator-quit)) | |
| 437 | (define-key map [?\e ?\e ?\e] 'calculator-quit)) | |
| 438 | ;; make C-h work in text-mode | |
| 439 | (or window-system (define-key map [?\C-h] 'calculator-backspace)) | |
| 86f1e1ec | 440 | ;; set up a menu |
| 5335a8ce | 441 | (when (and calculator-use-menu (not (boundp 'calculator-menu))) |
| 86f1e1ec GM |
442 | (let ((radix-selectors |
| 443 | (mapcar (lambda (x) | |
| 444 | `([,(nth 0 x) | |
| 445 | (calculator-radix-mode ,(nth 2 x)) | |
| 446 | :style radio | |
| 447 | :keys ,(nth 2 x) | |
| 448 | :selected | |
| 449 | (and | |
| 450 | (eq calculator-input-radix ',(nth 1 x)) | |
| 451 | (eq calculator-output-radix ',(nth 1 x)))] | |
| 452 | [,(concat (nth 0 x) " Input") | |
| 453 | (calculator-radix-input-mode ,(nth 2 x)) | |
| 454 | :keys ,(concat "i" (downcase (nth 2 x))) | |
| 455 | :style radio | |
| 456 | :selected | |
| 457 | (eq calculator-input-radix ',(nth 1 x))] | |
| 458 | [,(concat (nth 0 x) " Output") | |
| 459 | (calculator-radix-output-mode ,(nth 2 x)) | |
| 460 | :keys ,(concat "o" (downcase (nth 2 x))) | |
| 461 | :style radio | |
| 462 | :selected | |
| 463 | (eq calculator-output-radix ',(nth 1 x))])) | |
| 464 | '(("Decimal" nil "D") | |
| 465 | ("Binary" bin "B") | |
| 466 | ("Octal" oct "O") | |
| 467 | ("Hexadecimal" hex "H")))) | |
| 4d789d84 SM |
468 | (op (lambda (name key) |
| 469 | `[,name (calculator-op ,key) :keys ,key]))) | |
| 86f1e1ec | 470 | (easy-menu-define |
| 4d789d84 SM |
471 | calculator-menu map "Calculator menu." |
| 472 | `("Calculator" | |
| 473 | ["Help" | |
| 474 | (let ((last-command 'calculator-help)) (calculator-help)) | |
| 475 | :keys "?"] | |
| 476 | "---" | |
| 477 | ["Copy" calculator-copy] | |
| 478 | ["Paste" calculator-paste] | |
| 86f1e1ec | 479 | "---" |
| 4d789d84 SM |
480 | ["Electric mode" |
| 481 | (progn (calculator-quit) | |
| 482 | (setq calculator-restart-other-mode t) | |
| 4f91a816 | 483 | (run-with-timer 0.1 nil (lambda () (message nil))) |
| 4d789d84 SM |
484 | ;; the message from the menu will be visible, |
| 485 | ;; couldn't make it go away... | |
| 486 | (calculator)) | |
| 487 | :active (not calculator-electric-mode)] | |
| 488 | ["Normal mode" | |
| 489 | (progn (setq calculator-restart-other-mode t) | |
| 490 | (calculator-quit)) | |
| 491 | :active calculator-electric-mode] | |
| 86f1e1ec | 492 | "---" |
| 4d789d84 SM |
493 | ("Functions" |
| 494 | ,(funcall op "Repeat-right" ">") | |
| 495 | ,(funcall op "Repeat-left" "<") | |
| 496 | "------General------" | |
| 497 | ,(funcall op "Reciprocal" ";") | |
| 498 | ,(funcall op "Log" "L") | |
| 499 | ,(funcall op "Square-root" "Q") | |
| 500 | ,(funcall op "Factorial" "!") | |
| 501 | "------Trigonometric------" | |
| 502 | ,(funcall op "Sinus" "S") | |
| 503 | ,(funcall op "Cosine" "C") | |
| 504 | ,(funcall op "Tangent" "T") | |
| 505 | ,(funcall op "Inv-Sinus" "IS") | |
| 506 | ,(funcall op "Inv-Cosine" "IC") | |
| 507 | ,(funcall op "Inv-Tangent" "IT") | |
| 508 | "------Bitwise------" | |
| 509 | ,(funcall op "Or" "|") | |
| 510 | ,(funcall op "Xor" "#") | |
| 511 | ,(funcall op "And" "&") | |
| 512 | ,(funcall op "Not" "~")) | |
| 513 | ("Saved List" | |
| 514 | ["Eval+Save" calculator-save-on-list] | |
| 515 | ["Prev number" calculator-saved-up] | |
| 516 | ["Next number" calculator-saved-down] | |
| 517 | ["Delete current" calculator-clear | |
| 518 | :active (and calculator-display-fragile | |
| 519 | calculator-saved-list | |
| 520 | (= (car calculator-stack) | |
| 521 | (nth calculator-saved-ptr | |
| 522 | calculator-saved-list)))] | |
| 523 | ["Delete all" calculator-clear-saved] | |
| 86f1e1ec | 524 | "---" |
| 4d789d84 SM |
525 | ,(funcall op "List-total" "l") |
| 526 | ,(funcall op "List-average" "v")) | |
| 527 | ("Registers" | |
| 528 | ["Get register" calculator-get-register] | |
| 529 | ["Set register" calculator-set-register]) | |
| 530 | ("Modes" | |
| 531 | ["Radians" | |
| 532 | (progn | |
| 533 | (and (or calculator-input-radix calculator-output-radix) | |
| 534 | (calculator-radix-mode "D")) | |
| 535 | (and calculator-deg (calculator-dec/deg-mode))) | |
| 536 | :keys "D" | |
| 537 | :style radio | |
| 538 | :selected (not (or calculator-input-radix | |
| 539 | calculator-output-radix | |
| 540 | calculator-deg))] | |
| 541 | ["Degrees" | |
| 542 | (progn | |
| 543 | (and (or calculator-input-radix calculator-output-radix) | |
| 544 | (calculator-radix-mode "D")) | |
| 545 | (or calculator-deg (calculator-dec/deg-mode))) | |
| 546 | :keys "D" | |
| 547 | :style radio | |
| 548 | :selected (and calculator-deg | |
| 549 | (not (or calculator-input-radix | |
| 550 | calculator-output-radix)))] | |
| 551 | "---" | |
| 552 | ,@(mapcar 'car radix-selectors) | |
| 553 | ("Separate I/O" | |
| 554 | ,@(mapcar (lambda (x) (nth 1 x)) radix-selectors) | |
| 555 | "---" | |
| 556 | ,@(mapcar (lambda (x) (nth 2 x)) radix-selectors))) | |
| 557 | ("Decimal Display" | |
| 558 | ,@(mapcar (lambda (d) | |
| 559 | (vector (cadr d) | |
| 560 | ;; Note: inserts actual object here | |
| 561 | `(calculator-rotate-displayer ',d))) | |
| 562 | calculator-displayers) | |
| 563 | "---" | |
| 564 | ["Change Prev Display" calculator-displayer-prev] | |
| 565 | ["Change Next Display" calculator-displayer-next]) | |
| 25c269ef | 566 | "---" |
| 4d789d84 SM |
567 | ["Copy+Quit" calculator-save-and-quit] |
| 568 | ["Quit" calculator-quit])))) | |
| 569 | map) | |
| 570 | "The calculator key map.") | |
| d240a249 | 571 | |
| cbb2dddb | 572 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
573 | ;;; Startup and mode stuff |
| 574 | ||
| 4d789d84 | 575 | (define-derived-mode calculator-mode fundamental-mode "Calculator" |
| 25c269ef DL |
576 | ;; this help is also used as the major help screen |
| 577 | "A [not so] simple calculator for Emacs. | |
| d240a249 GM |
578 | |
| 579 | This calculator is used in the same way as other popular calculators | |
| 5335a8ce | 580 | like xcalc or calc.exe -- but using an Emacs interface. |
| d240a249 GM |
581 | |
| 582 | Expressions are entered using normal infix notation, parens are used as | |
| 583 | normal. Unary functions are usually postfix, but some depends on the | |
| 584 | value of `calculator-unary-style' (if the style for an operator below is | |
| 585 | specified, then it is fixed, otherwise it depends on this variable). | |
| 586 | `+' and `-' can be used as either binary operators or prefix unary | |
| 587 | operators. Numbers can be entered with exponential notation using `e', | |
| 588 | except when using a non-decimal radix mode for input (in this case `e' | |
| 5335a8ce | 589 | will be the hexadecimal digit). |
| d240a249 GM |
590 | |
| 591 | Here are the editing keys: | |
| 592 | * `RET' `=' evaluate the current expression | |
| 593 | * `C-insert' copy the whole current expression to the `kill-ring' | |
| 86f1e1ec | 594 | * `C-return' evaluate, save result the `kill-ring' and exit |
| d240a249 GM |
595 | * `insert' paste a number if the one was copied (normally) |
| 596 | * `delete' `C-d' clear last argument or whole expression (hit twice) | |
| 597 | * `backspace' delete a digit or a previous expression element | |
| 598 | * `h' `?' pop-up a quick reference help | |
| 599 | * `ESC' `q' exit (`ESC' can be used if `calculator-bind-escape' is | |
| 600 | non-nil, otherwise use three consecutive `ESC's) | |
| 601 | ||
| 602 | These operators are pre-defined: | |
| 603 | * `+' `-' `*' `/' the common binary operators | |
| 604 | * `\\' `%' integer division and reminder | |
| 605 | * `_' `;' postfix unary negation and reciprocal | |
| 606 | * `^' `L' binary operators for x^y and log(x) in base y | |
| 607 | * `Q' `!' unary square root and factorial | |
| 5335a8ce EB |
608 | * `S' `C' `T' unary trigonometric operators: sin, cos and tan |
| 609 | * `|' `#' `&' `~' bitwise operators: or, xor, and, not | |
| d240a249 GM |
610 | |
| 611 | The trigonometric functions can be inverted if prefixed with an `I', see | |
| 612 | below for the way to use degrees instead of the default radians. | |
| 613 | ||
| 614 | Two special postfix unary operators are `>' and `<': whenever a binary | |
| 615 | operator is performed, it is remembered along with its arguments; then | |
| 616 | `>' (`<') will apply the same operator with the same right (left) | |
| 617 | argument. | |
| 618 | ||
| 619 | hex/oct/bin modes can be set for input and for display separately. | |
| 620 | Another toggle-able mode is for using degrees instead of radians for | |
| 621 | trigonometric functions. | |
| 622 | The keys to switch modes are (`X' is shortcut for `H'): | |
| 623 | * `D' switch to all-decimal mode, or toggle degrees/radians | |
| 624 | * `B' `O' `H' `X' binary/octal/hexadecimal modes for input & display | |
| 625 | * `i' `o' followed by one of `D' `B' `O' `H' `X' (case | |
| 626 | insensitive) sets only the input or display radix mode | |
| 627 | The prompt indicates the current modes: | |
| 628 | * \"D=\": degrees mode; | |
| 629 | * \"?=\": (? is B/O/H) this is the radix for both input and output; | |
| 630 | * \"=?\": (? is B/O/H) the display radix (when input is decimal); | |
| 631 | * \"??\": (? is D/B/O/H) 1st char for input radix, 2nd for display. | |
| 632 | ||
| 761d3eb3 RS |
633 | Also, the quote key can be used to switch display modes for decimal |
| 634 | numbers (double-quote rotates back), and the two brace characters | |
| 5335a8ce EB |
635 | \(\"{\" and \"}\" change display parameters that these displayers use, |
| 636 | if they handle such). If output is using any radix mode, then these | |
| 637 | keys toggle digit grouping mode and the chunk size. | |
| 25c269ef | 638 | |
| d240a249 GM |
639 | Values can be saved for future reference in either a list of saved |
| 640 | values, or in registers. | |
| 641 | ||
| 642 | The list of saved values is useful for statistics operations on some | |
| 643 | collected data. It is possible to navigate in this list, and if the | |
| 644 | value shown is the current one on the list, an indication is displayed | |
| 645 | as \"[N]\" if this is the last number and there are N numbers, or | |
| 646 | \"[M/N]\" if the M-th value is shown. | |
| 647 | * `SPC' evaluate the current value as usual, but also adds | |
| 648 | the result to the list of saved values | |
| 649 | * `l' `v' computes total / average of saved values | |
| 650 | * `up' `C-p' browse to the previous value in the list | |
| 651 | * `down' `C-n' browse to the next value in the list | |
| 652 | * `delete' `C-d' remove current value from the list (if it is on it) | |
| 653 | * `C-delete' `C-c' delete the whole list | |
| 654 | ||
| 655 | Registers are variable-like place-holders for values: | |
| 656 | * `s' followed by a character attach the current value to that character | |
| 657 | * `g' followed by a character fetches the attached value | |
| 658 | ||
| 659 | There are many variables that can be used to customize the calculator. | |
| 660 | Some interesting customization variables are: | |
| 661 | * `calculator-electric-mode' use only the echo-area electrically. | |
| 662 | * `calculator-unary-style' set most unary ops to pre/postfix style. | |
| 663 | * `calculator-user-registers' to define user-preset registers. | |
| 664 | * `calculator-user-operators' to add user-defined operators. | |
| 665 | See the documentation for these variables, and \"calculator.el\" for | |
| 666 | more information. | |
| 667 | ||
| 4d789d84 | 668 | \\{calculator-mode-map}") |
| d240a249 | 669 | |
| f440830d GM |
670 | (declare-function Electric-command-loop "electric" |
| 671 | (return-tag &optional prompt inhibit-quitting | |
| 672 | loop-function loop-state)) | |
| 25c269ef | 673 | |
| d240a249 GM |
674 | ;;;###autoload |
| 675 | (defun calculator () | |
| 25c269ef | 676 | "Run the Emacs calculator. |
| d240a249 GM |
677 | See the documentation for `calculator-mode' for more information." |
| 678 | (interactive) | |
| 5335a8ce | 679 | (when calculator-restart-other-mode |
| 86f1e1ec | 680 | (setq calculator-electric-mode (not calculator-electric-mode))) |
| 5335a8ce EB |
681 | (when calculator-initial-operators |
| 682 | (calculator-add-operators calculator-initial-operators) | |
| 683 | (setq calculator-initial-operators nil) | |
| 684 | ;; don't change this since it is a customization variable, | |
| 685 | ;; its set function will add any new operators | |
| 686 | (calculator-add-operators calculator-user-operators)) | |
| cc234da9 | 687 | (setq calculator-buffer (get-buffer-create "*calculator*")) |
| d240a249 GM |
688 | (if calculator-electric-mode |
| 689 | (save-window-excursion | |
| 5335a8ce EB |
690 | (require 'electric) (message nil) ; hide load message |
| 691 | (let (old-g-map old-l-map | |
| 692 | (old-buf (window-buffer (minibuffer-window))) | |
| 693 | (echo-keystrokes 0) | |
| d240a249 | 694 | (garbage-collection-messages nil)) ; no gc msg when electric |
| cc234da9 | 695 | (set-window-buffer (minibuffer-window) calculator-buffer) |
| d240a249 GM |
696 | (select-window (minibuffer-window)) |
| 697 | (calculator-reset) | |
| 698 | (calculator-update-display) | |
| 699 | (setq old-l-map (current-local-map)) | |
| 700 | (setq old-g-map (current-global-map)) | |
| 701 | (setq calculator-saved-global-map (current-global-map)) | |
| 86f1e1ec | 702 | (use-local-map nil) |
| d240a249 | 703 | (use-global-map calculator-mode-map) |
| 761d3eb3 | 704 | (run-hooks 'calculator-mode-hook) |
| d240a249 GM |
705 | (unwind-protect |
| 706 | (catch 'calculator-done | |
| 707 | (Electric-command-loop | |
| 708 | 'calculator-done | |
| 709 | ;; can't use 'noprompt, bug in electric.el | |
| 4f91a816 | 710 | (lambda () 'noprompt) |
| d240a249 | 711 | nil |
| 45fdb482 | 712 | (lambda (_x _y) (calculator-update-display)))) |
| 5335a8ce EB |
713 | (set-window-buffer (minibuffer-window) old-buf) |
| 714 | (kill-buffer calculator-buffer) | |
| d240a249 GM |
715 | (use-local-map old-l-map) |
| 716 | (use-global-map old-g-map)))) | |
| 86f1e1ec | 717 | (progn |
| 4351784f GM |
718 | (cond |
| 719 | ((not (get-buffer-window calculator-buffer)) | |
| a4e32226 | 720 | (let ((window-min-height 2)) |
| 37269466 CY |
721 | ;; maybe leave two lines for our window because of the |
| 722 | ;; normal `raised' mode line | |
| 5335a8ce EB |
723 | (select-window (split-window-below |
| 724 | (if (calculator-need-3-lines) -3 -2))) | |
| 4351784f GM |
725 | (switch-to-buffer calculator-buffer))) |
| 726 | ((not (eq (current-buffer) calculator-buffer)) | |
| 727 | (select-window (get-buffer-window calculator-buffer)))) | |
| 86f1e1ec GM |
728 | (calculator-mode) |
| 729 | (setq buffer-read-only t) | |
| 730 | (calculator-reset) | |
| 731 | (message "Hit `?' For a quick help screen."))) | |
| 5335a8ce | 732 | (when (and calculator-restart-other-mode calculator-electric-mode) |
| 86f1e1ec | 733 | (calculator))) |
| d240a249 | 734 | |
| 5335a8ce EB |
735 | (defun calculator-need-3-lines () |
| 736 | ;; If the mode line might interfere with the calculator buffer, use 3 | |
| 737 | ;; lines instead. | |
| 738 | (let* ((dh (face-attribute 'default :height)) | |
| 739 | (mh (face-attribute 'mode-line :height))) | |
| 740 | ;; if the mode line is shorter than the default, stick with 2 lines | |
| 741 | ;; (it may be necessary to check how much shorter) | |
| 742 | (and (not (or (and (integerp dh) (integerp mh) (< mh dh)) | |
| 743 | (and (numberp mh) (not (integerp mh)) (< mh 1)))) | |
| 744 | (or ;; if the mode line is taller than the default, use 3 lines | |
| 745 | (and (integerp dh) (integerp mh) (> mh dh)) | |
| 746 | (and (numberp mh) (not (integerp mh)) (> mh 1)) | |
| 747 | ;; if the mode line has a box with non-negative line-width, | |
| 748 | ;; use 3 lines | |
| 749 | (let* ((bx (face-attribute 'mode-line :box)) | |
| 750 | (lh (plist-get bx :line-width))) | |
| 751 | (and bx (or (not lh) (> lh 0)))) | |
| 752 | ;; if the mode line has an overline, use 3 lines | |
| 753 | (not (memq (face-attribute 'mode-line :overline) | |
| 754 | '(nil unspecified))))))) | |
| 755 | ||
| 761d3eb3 | 756 | (defun calculator-message (string &rest arguments) |
| 5335a8ce | 757 | "Same as `message', but also handle electric mode." |
| 761d3eb3 | 758 | (apply 'message string arguments) |
| 5335a8ce | 759 | (when calculator-electric-mode (sit-for 1) (message nil))) |
| 761d3eb3 | 760 | |
| cbb2dddb | 761 | ;;;--------------------------------------------------------------------- |
| 2188f2d4 | 762 | ;;; Operators |
| 25c269ef | 763 | |
| d240a249 | 764 | (defun calculator-op-arity (op) |
| 5335a8ce EB |
765 | "Return OP's arity. |
| 766 | Current results are one of 2 (binary), +1 (postfix), -1 (prefix), or | |
| 767 | 0 (nullary)." | |
| 768 | (let ((arity (nth 3 op))) | |
| 769 | (cond ((numberp arity) arity) | |
| 770 | ((eq calculator-unary-style 'postfix) +1) | |
| 771 | (t -1)))) | |
| d240a249 GM |
772 | |
| 773 | (defun calculator-op-prec (op) | |
| 774 | "Return OP's precedence for reducing when inserting into the stack. | |
| 775 | Defaults to 1." | |
| 776 | (or (nth 4 op) 1)) | |
| 777 | ||
| 778 | (defun calculator-add-operators (more-ops) | |
| 779 | "This function handles operator addition. | |
| 780 | Adds MORE-OPS to `calculator-operator', called initially to handle | |
| 781 | `calculator-initial-operators' and `calculator-user-operators'." | |
| 782 | (let ((added-ops nil)) | |
| 783 | (while more-ops | |
| 5335a8ce EB |
784 | (or (eq (caar more-ops) 'nobind) |
| 785 | (let ((i -1) (key (caar more-ops))) | |
| d240a249 GM |
786 | ;; make sure the key is undefined, so it's easy to define |
| 787 | ;; prefix keys | |
| 788 | (while (< (setq i (1+ i)) (length key)) | |
| 789 | (or (keymapp | |
| 790 | (lookup-key calculator-mode-map | |
| 791 | (substring key 0 (1+ i)))) | |
| 792 | (progn | |
| 793 | (define-key | |
| 794 | calculator-mode-map (substring key 0 (1+ i)) nil) | |
| 795 | (setq i (length key))))) | |
| 796 | (define-key calculator-mode-map key 'calculator-op))) | |
| 5335a8ce EB |
797 | (setq added-ops (cons (if (eq (caar more-ops) 'nobind) |
| 798 | (cdar more-ops) | |
| d240a249 GM |
799 | (car more-ops)) |
| 800 | added-ops)) | |
| 801 | (setq more-ops (cdr more-ops))) | |
| 802 | ;; added-ops come first, but in correct order | |
| 803 | (setq calculator-operators | |
| 804 | (append (nreverse added-ops) calculator-operators)))) | |
| 805 | ||
| cbb2dddb | 806 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
807 | ;;; Display stuff |
| 808 | ||
| d240a249 GM |
809 | (defun calculator-reset () |
| 810 | "Reset calculator variables." | |
| 86f1e1ec GM |
811 | (or calculator-restart-other-mode |
| 812 | (setq calculator-stack nil | |
| 813 | calculator-curnum nil | |
| 814 | calculator-stack-display nil | |
| 815 | calculator-display-fragile nil)) | |
| 816 | (setq calculator-restart-other-mode nil) | |
| d240a249 GM |
817 | (calculator-update-display)) |
| 818 | ||
| 5335a8ce | 819 | (defun calculator-get-display () |
| d240a249 | 820 | "Return a string to display. |
| 5335a8ce EB |
821 | The result should not exceed the screen width." |
| 822 | (let* ((in-r (and calculator-input-radix | |
| 823 | (char-to-string | |
| 824 | (car (rassq calculator-input-radix | |
| 825 | calculator-char-radix))))) | |
| 826 | (out-r (and calculator-output-radix | |
| 827 | (char-to-string | |
| 828 | (car (rassq calculator-output-radix | |
| 829 | calculator-char-radix))))) | |
| 830 | (prompt (format calculator-prompt | |
| 831 | (cond ((or in-r out-r) | |
| 832 | (concat (or in-r "=") | |
| 833 | (if (equal in-r out-r) "=" | |
| 834 | (or out-r "=")))) | |
| 835 | (calculator-deg "D=") | |
| 836 | (t "==")))) | |
| 837 | (expr | |
| 838 | (concat (cdr calculator-stack-display) | |
| d240a249 | 839 | (cond |
| 5335a8ce EB |
840 | ;; entering a number |
| 841 | (calculator-curnum (concat calculator-curnum "_")) | |
| 842 | ;; showing a result | |
| 843 | ((and (= 1 (length calculator-stack)) | |
| 844 | calculator-display-fragile) | |
| 845 | nil) | |
| 846 | ;; waiting for a number or an operator | |
| 847 | (t "?")))) | |
| 848 | (trim (+ (length expr) (length prompt) 1 (- (window-width))))) | |
| 849 | (concat prompt (if (<= trim 0) expr (substring expr trim))))) | |
| d240a249 | 850 | |
| 761d3eb3 RS |
851 | (defun calculator-string-to-number (str) |
| 852 | "Convert the given STR to a number, according to the value of | |
| 853 | `calculator-input-radix'." | |
| d240a249 GM |
854 | (if calculator-input-radix |
| 855 | (let ((radix | |
| 856 | (cdr (assq calculator-input-radix | |
| 857 | '((bin . 2) (oct . 8) (hex . 16))))) | |
| 761d3eb3 RS |
858 | (i -1) (value 0) (new-value 0)) |
| 859 | ;; assume mostly valid input (e.g., characters in range) | |
| 860 | (while (< (setq i (1+ i)) (length str)) | |
| 861 | (setq new-value | |
| 862 | (let* ((ch (upcase (aref str i))) | |
| 863 | (n (cond ((< ch ?0) nil) | |
| 864 | ((<= ch ?9) (- ch ?0)) | |
| 865 | ((< ch ?A) nil) | |
| 866 | ((<= ch ?Z) (- ch (- ?A 10))) | |
| 867 | (t nil)))) | |
| 868 | (if (and n (<= 0 n) (< n radix)) | |
| 869 | (+ n (* radix value)) | |
| 870 | (progn | |
| 871 | (calculator-message | |
| 872 | "Warning: Ignoring bad input character `%c'." ch) | |
| 873 | (sit-for 1) | |
| 874 | value)))) | |
| 5335a8ce | 875 | (when (if (< new-value 0) (> value 0) (< value 0)) |
| 761d3eb3 RS |
876 | (calculator-message "Warning: Overflow in input.")) |
| 877 | (setq value new-value)) | |
| d240a249 | 878 | value) |
| 761d3eb3 RS |
879 | (car (read-from-string |
| 880 | (cond ((equal "." str) "0.0") | |
| 45fdb482 JB |
881 | ((string-match-p "[eE][+-]?$" str) (concat str "0")) |
| 882 | ((string-match-p "\\.[0-9]\\|[eE]" str) str) | |
| 883 | ((string-match-p "\\." str) | |
| 761d3eb3 RS |
884 | ;; do this because Emacs reads "23." as an integer |
| 885 | (concat str "0")) | |
| 886 | ((stringp str) (concat str ".0")) | |
| 887 | (t "0.0")))))) | |
| 888 | ||
| 5335a8ce EB |
889 | (defun calculator-push-curnum () |
| 890 | "Push the numeric value of the displayed number to the stack." | |
| 891 | (when calculator-curnum | |
| 892 | (push (calculator-string-to-number calculator-curnum) | |
| 893 | calculator-stack) | |
| 894 | (setq calculator-curnum nil))) | |
| d240a249 | 895 | |
| 25c269ef DL |
896 | (defun calculator-rotate-displayer (&optional new-disp) |
| 897 | "Switch to the next displayer on the `calculator-displayers' list. | |
| 898 | Can be called with an optional argument NEW-DISP to force rotation to | |
| 761d3eb3 RS |
899 | that argument. |
| 900 | If radix output mode is active, toggle digit grouping." | |
| 25c269ef | 901 | (interactive) |
| 761d3eb3 RS |
902 | (cond |
| 903 | (calculator-output-radix | |
| 904 | (setq calculator-radix-grouping-mode | |
| 905 | (not calculator-radix-grouping-mode)) | |
| 906 | (calculator-message | |
| 907 | "Digit grouping mode %s." | |
| 908 | (if calculator-radix-grouping-mode "ON" "OFF"))) | |
| 909 | (t | |
| 910 | (setq calculator-displayers | |
| 911 | (if (and new-disp (memq new-disp calculator-displayers)) | |
| 912 | (let ((tmp nil)) | |
| 913 | (while (not (eq (car calculator-displayers) new-disp)) | |
| 914 | (setq tmp (cons (car calculator-displayers) tmp)) | |
| 915 | (setq calculator-displayers | |
| 916 | (cdr calculator-displayers))) | |
| 917 | (setq calculator-displayers | |
| 918 | (nconc calculator-displayers (nreverse tmp)))) | |
| 919 | (nconc (cdr calculator-displayers) | |
| 920 | (list (car calculator-displayers))))) | |
| 921 | (calculator-message | |
| 922 | "Using %s." (cadr (car calculator-displayers))))) | |
| 25c269ef DL |
923 | (calculator-enter)) |
| 924 | ||
| 925 | (defun calculator-rotate-displayer-back () | |
| 761d3eb3 RS |
926 | "Like `calculator-rotate-displayer', but rotates modes back. |
| 927 | If radix output mode is active, toggle digit grouping." | |
| 25c269ef DL |
928 | (interactive) |
| 929 | (calculator-rotate-displayer (car (last calculator-displayers)))) | |
| 930 | ||
| 4351784f | 931 | (defun calculator-displayer-prev () |
| 5335a8ce | 932 | "Send the current displayer function a `left' argument. |
| 25c269ef | 933 | This is used to modify display arguments (if the current displayer |
| 761d3eb3 RS |
934 | function supports this). |
| 935 | If radix output mode is active, increase the grouping size." | |
| 25c269ef | 936 | (interactive) |
| 761d3eb3 RS |
937 | (if calculator-output-radix |
| 938 | (progn (setq calculator-radix-grouping-digits | |
| 939 | (1+ calculator-radix-grouping-digits)) | |
| 940 | (calculator-enter)) | |
| 941 | (and (car calculator-displayers) | |
| 942 | (let ((disp (caar calculator-displayers))) | |
| 5335a8ce EB |
943 | (cond ((symbolp disp) (funcall disp 'left)) |
| 944 | ((and (consp disp) (eq 'std (car disp))) | |
| 945 | (calculator-standard-displayer 'left))))))) | |
| 25c269ef | 946 | |
| 4351784f | 947 | (defun calculator-displayer-next () |
| 5335a8ce | 948 | "Send the current displayer function a `right' argument. |
| 25c269ef | 949 | This is used to modify display arguments (if the current displayer |
| 761d3eb3 RS |
950 | function supports this). |
| 951 | If radix output mode is active, decrease the grouping size." | |
| 25c269ef | 952 | (interactive) |
| 761d3eb3 RS |
953 | (if calculator-output-radix |
| 954 | (progn (setq calculator-radix-grouping-digits | |
| 955 | (max 2 (1- calculator-radix-grouping-digits))) | |
| 956 | (calculator-enter)) | |
| 957 | (and (car calculator-displayers) | |
| 958 | (let ((disp (caar calculator-displayers))) | |
| 5335a8ce EB |
959 | (cond ((symbolp disp) (funcall disp 'right)) |
| 960 | ((and (consp disp) (eq 'std (car disp))) | |
| 961 | (calculator-standard-displayer 'right))))))) | |
| 25c269ef DL |
962 | |
| 963 | (defun calculator-remove-zeros (numstr) | |
| a1ff7705 JB |
964 | "Get a number string NUMSTR and remove unnecessary zeros. |
| 965 | The behavior of this function is controlled by | |
| 25c269ef | 966 | `calculator-remove-zeros'." |
| 5335a8ce EB |
967 | (let* ((s (if (not (eq calculator-remove-zeros t)) numstr |
| 968 | ;; remove all redundant zeros leaving an integer | |
| 969 | (replace-regexp-in-string | |
| 970 | "\\.0+\\([eE].*\\)?$" "\\1" numstr))) | |
| 971 | (s (if (not calculator-remove-zeros) s | |
| 972 | ;; remove zeros, except for first after the "." | |
| 973 | (replace-regexp-in-string | |
| 974 | "\\(\\..[0-9]*?\\)0+\\([eE].*\\)?$" "\\1\\2" s)))) | |
| 975 | s)) | |
| 976 | ||
| 977 | (defun calculator-groupize-number (str n sep &optional fromleft) | |
| 978 | "Return the input string STR with occurrences of SEP that separate | |
| 979 | every N characters starting from the right, or from the left if | |
| 980 | FROMLEFT is true." | |
| 981 | (let* ((len (length str)) (i (/ len n)) (j (% len n)) | |
| 982 | (r (if (or (not fromleft) (= j 0)) '() | |
| 983 | (list (substring str (- len j)))))) | |
| 984 | (while (> i 0) | |
| 985 | (let* ((e (* i n)) (e (if fromleft e (+ e j)))) | |
| 986 | (push (substring str (- e n) e) r)) | |
| 987 | (setq i (1- i))) | |
| 988 | (when (and (not fromleft) (> j 0)) | |
| 989 | (push (substring str 0 j) r)) | |
| 990 | (mapconcat 'identity r sep))) | |
| 991 | ||
| 992 | (defun calculator-standard-displayer (num &optional char group-p) | |
| 25c269ef DL |
993 | "Standard display function, used to display NUM. |
| 994 | Its behavior is determined by `calculator-number-digits' and the given | |
| 995 | CHAR argument (both will be used to compose a format string). If the | |
| 996 | char is \"n\" then this function will choose one between %f or %e, this | |
| 997 | is a work around %g jumping to exponential notation too fast. | |
| 998 | ||
| 5335a8ce EB |
999 | It will also split digit sequences into comma-separated groups |
| 1000 | and/or remove redundant zeros. | |
| 25c269ef | 1001 | |
| 5335a8ce EB |
1002 | The special `left' and `right' symbols will make it change the current |
| 1003 | number of digits displayed (`calculator-number-digits')." | |
| 25c269ef DL |
1004 | (if (symbolp num) |
| 1005 | (cond ((eq num 'left) | |
| 1006 | (and (> calculator-number-digits 0) | |
| 1007 | (setq calculator-number-digits | |
| 1008 | (1- calculator-number-digits)) | |
| 1009 | (calculator-enter))) | |
| 1010 | ((eq num 'right) | |
| 1011 | (setq calculator-number-digits | |
| 1012 | (1+ calculator-number-digits)) | |
| 1013 | (calculator-enter))) | |
| 5335a8ce EB |
1014 | (let* ((s (if (eq char ?n) |
| 1015 | (let ((n (abs num))) | |
| 1016 | (if (or (and (< 0 n) (< n 0.001)) (< 1e8 n)) ?e ?f)) | |
| 1017 | char)) | |
| 1018 | (s (format "%%.%s%c" calculator-number-digits s)) | |
| 1019 | (s (calculator-remove-zeros (format s num))) | |
| 1020 | (s (if (or (not group-p) (string-match-p "[eE]" s)) s | |
| 1021 | (replace-regexp-in-string | |
| cc43334a EB |
1022 | "\\([0-9]+\\)\\(?:\\..*\\|$\\)" |
| 1023 | (lambda (_) (calculator-groupize-number | |
| 1024 | (match-string 1 s) 3 ",")) | |
| 5335a8ce EB |
1025 | s nil nil 1)))) |
| 1026 | s))) | |
| 25c269ef DL |
1027 | |
| 1028 | (defun calculator-eng-display (num) | |
| 1029 | "Display NUM in engineering notation. | |
| 1030 | The number of decimal digits used is controlled by | |
| 1031 | `calculator-number-digits', so to change it at runtime you have to use | |
| 5335a8ce | 1032 | the `left' or `right' when one of the standard modes is used." |
| 25c269ef DL |
1033 | (if (symbolp num) |
| 1034 | (cond ((eq num 'left) | |
| 1035 | (setq calculator-eng-extra | |
| 5335a8ce | 1036 | (if calculator-eng-extra (1+ calculator-eng-extra) 1)) |
| 25c269ef DL |
1037 | (let ((calculator-eng-tmp-show t)) (calculator-enter))) |
| 1038 | ((eq num 'right) | |
| 1039 | (setq calculator-eng-extra | |
| 5335a8ce | 1040 | (if calculator-eng-extra (1- calculator-eng-extra) -1)) |
| 25c269ef DL |
1041 | (let ((calculator-eng-tmp-show t)) (calculator-enter)))) |
| 1042 | (let ((exp 0)) | |
| 5335a8ce EB |
1043 | (unless (= 0 num) |
| 1044 | (while (< (abs num) 1.0) | |
| 1045 | (setq num (* num 1000.0)) (setq exp (- exp 3))) | |
| 1046 | (while (> (abs num) 999.0) | |
| 1047 | (setq num (/ num 1000.0)) (setq exp (+ exp 3))) | |
| 1048 | (when (and calculator-eng-tmp-show | |
| 1049 | (not (= 0 calculator-eng-extra))) | |
| 1050 | (let ((i calculator-eng-extra)) | |
| 1051 | (while (> i 0) | |
| 1052 | (setq num (* num 1000.0)) (setq exp (- exp 3)) | |
| 1053 | (setq i (1- i))) | |
| 1054 | (while (< i 0) | |
| 1055 | (setq num (/ num 1000.0)) (setq exp (+ exp 3)) | |
| 1056 | (setq i (1+ i)))))) | |
| 25c269ef | 1057 | (or calculator-eng-tmp-show (setq calculator-eng-extra nil)) |
| 5335a8ce | 1058 | (let ((str (format (format "%%.%sf" calculator-number-digits) |
| 25c269ef DL |
1059 | num))) |
| 1060 | (concat (let ((calculator-remove-zeros | |
| 1061 | ;; make sure we don't leave integers | |
| 1062 | (and calculator-remove-zeros 'x))) | |
| 1063 | (calculator-remove-zeros str)) | |
| 1064 | "e" (number-to-string exp)))))) | |
| 1065 | ||
| 761d3eb3 | 1066 | (defun calculator-number-to-string (num) |
| d240a249 GM |
1067 | "Convert NUM to a displayable string." |
| 1068 | (cond | |
| 5335a8ce EB |
1069 | ;; operators are printed here, the rest is for numbers |
| 1070 | ((not (numberp num)) (prin1-to-string (nth 1 num) t)) | |
| 1071 | ;; %f/%e handle these, but avoid them in radix or in user displayers | |
| 1072 | ((and (floatp num) (isnan num)) "NaN") | |
| 1073 | ((<= 1.0e+INF num) "Inf") | |
| 1074 | ((<= num -1.0e+INF) "-Inf") | |
| 1075 | (calculator-output-radix | |
| 1076 | ;; print with radix -- for binary, convert the octal number | |
| 1077 | (let* ((fmt (if (eq calculator-output-radix 'hex) "%x" "%o")) | |
| 1078 | (str (if calculator-2s-complement num (abs num))) | |
| 1079 | (str (format fmt (calculator-truncate str))) | |
| 1080 | (bins '((?0 "000") (?1 "001") (?2 "010") (?3 "011") | |
| 1081 | (?4 "100") (?5 "101") (?6 "110") (?7 "111"))) | |
| 1082 | (str (if (not (eq calculator-output-radix 'bin)) str | |
| 1083 | (replace-regexp-in-string | |
| 1084 | "^0+\\(.\\)" "\\1" | |
| 1085 | (apply 'concat (mapcar (lambda (c) | |
| 1086 | (cadr (assq c bins))) | |
| 1087 | str))))) | |
| 1088 | (str (if (not calculator-radix-grouping-mode) str | |
| 1089 | (calculator-groupize-number | |
| 1090 | str calculator-radix-grouping-digits | |
| 1091 | calculator-radix-grouping-separator)))) | |
| 1092 | (upcase (if (or calculator-2s-complement (>= num 0)) str | |
| 1093 | (concat "-" str))))) | |
| 1094 | ((stringp calculator-displayer) (format calculator-displayer num)) | |
| 1095 | ((symbolp calculator-displayer) (funcall calculator-displayer num)) | |
| 1096 | ((eq 'std (car-safe calculator-displayer)) | |
| 1097 | (apply 'calculator-standard-displayer | |
| 1098 | num (cdr calculator-displayer))) | |
| 1099 | ((listp calculator-displayer) | |
| 1100 | (eval `(let ((num ',num)) ,calculator-displayer) t)) | |
| 1101 | ;; nil (or bad) displayer | |
| 1102 | (t (prin1-to-string num t)))) | |
| d240a249 GM |
1103 | |
| 1104 | (defun calculator-update-display (&optional force) | |
| 1105 | "Update the display. | |
| 1106 | If optional argument FORCE is non-nil, don't use the cached string." | |
| 1107 | (set-buffer calculator-buffer) | |
| 1108 | ;; update calculator-stack-display | |
| 5335a8ce EB |
1109 | (when (or force (not (eq (car calculator-stack-display) |
| 1110 | calculator-stack))) | |
| d240a249 GM |
1111 | (setq calculator-stack-display |
| 1112 | (cons calculator-stack | |
| 1113 | (if calculator-stack | |
| 1114 | (concat | |
| 4351784f GM |
1115 | (let ((calculator-displayer |
| 1116 | (if (and calculator-displayers | |
| 1117 | (= 1 (length calculator-stack))) | |
| 1118 | ;; customizable display for a single value | |
| 1119 | (caar calculator-displayers) | |
| 1120 | calculator-displayer))) | |
| 761d3eb3 | 1121 | (mapconcat 'calculator-number-to-string |
| 4351784f GM |
1122 | (reverse calculator-stack) |
| 1123 | " ")) | |
| d240a249 GM |
1124 | " " |
| 1125 | (and calculator-display-fragile | |
| 1126 | calculator-saved-list | |
| 1127 | (= (car calculator-stack) | |
| 1128 | (nth calculator-saved-ptr | |
| 1129 | calculator-saved-list)) | |
| 1130 | (if (= 0 calculator-saved-ptr) | |
| 1131 | (format "[%s]" (length calculator-saved-list)) | |
| 1132 | (format "[%s/%s]" | |
| 1133 | (- (length calculator-saved-list) | |
| 1134 | calculator-saved-ptr) | |
| 1135 | (length calculator-saved-list))))) | |
| 1136 | "")))) | |
| 1137 | (let ((inhibit-read-only t)) | |
| 1138 | (erase-buffer) | |
| 5335a8ce | 1139 | (insert (calculator-get-display))) |
| d240a249 | 1140 | (set-buffer-modified-p nil) |
| 5335a8ce EB |
1141 | (goto-char (if calculator-display-fragile |
| 1142 | (1+ (length calculator-prompt)) | |
| 1143 | (1- (point))))) | |
| d240a249 | 1144 | |
| cbb2dddb | 1145 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1146 | ;;; Stack computations |
| 1147 | ||
| 5335a8ce EB |
1148 | (defun calculator-reduce-stack-once (prec) |
| 1149 | "Worker for `calculator-reduce-stack'." | |
| 1150 | (cl-flet ((check (ar op) (and (listp op) | |
| 1151 | (<= prec (calculator-op-prec op)) | |
| 1152 | (= ar (calculator-op-arity op)))) | |
| 1153 | (call (op &rest args) (apply 'calculator-funcall | |
| 1154 | (nth 2 op) args))) | |
| 1155 | (pcase calculator-stack | |
| 1156 | ;; reduce "... ( x )" --> "... x" | |
| 1157 | (`((,_ \) . ,_) ,(and X (pred numberp)) (,_ \( . ,_) . ,rest) | |
| 1158 | (cons X rest)) | |
| 1159 | ;; reduce "... x op y" --> "... r", r is the result | |
| 1160 | (`(,(and Y (pred numberp)) | |
| 1161 | ,(and O (pred (check 2))) | |
| 1162 | ,(and X (pred numberp)) | |
| 1163 | . ,rest) | |
| 1164 | (cons (call O X Y) rest)) | |
| 1165 | ;; reduce "... op x" --> "... r" for prefix op | |
| 1166 | (`(,(and X (pred numberp)) ,(and O (pred (check -1))) . ,rest) | |
| 1167 | (cons (call O X) rest)) | |
| 1168 | ;; reduce "... x op" --> "... r" for postfix op | |
| 1169 | (`(,(and O (pred (check +1))) ,(and X (pred numberp)) . ,rest) | |
| 1170 | (cons (call O X) rest)) | |
| 1171 | ;; reduce "... op" --> "... r" for 0-ary op | |
| 1172 | (`(,(and O (pred (check 0))) . ,rest) | |
| 1173 | (cons (call O) rest)) | |
| 1174 | ;; reduce "... y x" --> "... x" | |
| 1175 | ;; (needed for 0-ary ops: replace current number with result) | |
| 1176 | (`(,(and X (pred numberp)) ,(and _Y (pred numberp)) . ,rest) | |
| 1177 | (cons X rest)) | |
| 1178 | (_ nil)))) ; nil = done | |
| 1179 | ||
| d240a249 | 1180 | (defun calculator-reduce-stack (prec) |
| 5335a8ce EB |
1181 | "Reduce the stack using top operators as long as possible. |
| 1182 | PREC is a precedence -- reduce everything with higher precedence." | |
| 1183 | (let ((new nil)) | |
| 1184 | (while (setq new (calculator-reduce-stack-once prec)) | |
| 1185 | (setq calculator-stack new)))) | |
| d240a249 | 1186 | |
| 25c269ef DL |
1187 | (defun calculator-funcall (f &optional X Y) |
| 1188 | "If F is a symbol, evaluate (F X Y). | |
| 1189 | Otherwise, it should be a list, evaluate it with X, Y bound to the | |
| 1190 | arguments." | |
| 1191 | ;; remember binary ops for calculator-repR/L | |
| 5335a8ce EB |
1192 | (when Y (setq calculator-last-opXY (list f X Y))) |
| 1193 | (if (symbolp f) | |
| 1194 | (cond ((and X Y) (funcall f X Y)) | |
| 1195 | (X (funcall f X)) | |
| 1196 | (t (funcall f))) | |
| 1197 | ;; f is an expression | |
| 1198 | (let ((TX (and X (calculator-truncate X))) | |
| 1199 | (TY (and Y (calculator-truncate Y))) | |
| 1200 | (DX (if (and X calculator-deg) (/ (* X pi) 180) X)) | |
| cc43334a EB |
1201 | (L calculator-saved-list) |
| 1202 | (fF `(calculator-funcall ',f x y)) | |
| 1203 | (fD `(if calculator-deg (/ (* x 180) float-pi) x))) | |
| 1204 | (eval `(cl-flet ((F (&optional x y) ,fF) (D (x) ,fD)) | |
| 1205 | (let ((X ,X) (Y ,Y) (DX ,DX) (TX ,TX) (TY ,TY) (L ',L)) | |
| 1206 | ,f)) | |
| 1207 | t)))) | |
| 25c269ef | 1208 | |
| cbb2dddb | 1209 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1210 | ;;; Input interaction |
| 1211 | ||
| 86f1e1ec GM |
1212 | (defun calculator-last-input (&optional keys) |
| 1213 | "Last char (or event or event sequence) that was read. | |
| 5335a8ce | 1214 | Use KEYS if given, otherwise use `this-command-keys'." |
| 86f1e1ec | 1215 | (let ((inp (or keys (this-command-keys)))) |
| d240a249 GM |
1216 | (if (or (stringp inp) (not (arrayp inp))) |
| 1217 | inp | |
| cc43334a | 1218 | ;; Translates kp-x to x and [tries to] create a string to lookup |
| 5335a8ce | 1219 | ;; operators; assume all symbols are translatable via |
| 7967f7d1 EB |
1220 | ;; `function-key-map'. This is needed because we have key |
| 1221 | ;; bindings for kp-* (which might be the wrong thing to do) so | |
| 1222 | ;; they don't get translated in `this-command-keys'. | |
| 5335a8ce | 1223 | (concat (mapcar (lambda (k) |
| 7967f7d1 | 1224 | (if (numberp k) k (error "??bad key?? (%S)" k))) |
| 5335a8ce | 1225 | (or (lookup-key function-key-map inp) inp)))))) |
| d240a249 GM |
1226 | |
| 1227 | (defun calculator-clear-fragile (&optional op) | |
| 1228 | "Clear the fragile flag if it was set, then maybe reset all. | |
| 1229 | OP is the operator (if any) that caused this call." | |
| 5335a8ce EB |
1230 | (when (and calculator-display-fragile |
| 1231 | (or (not op) (memq (calculator-op-arity op) '(-1 0)))) | |
| d240a249 | 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))) | |
| 5335a8ce EB |
1241 | (when (and (or calculator-display-fragile |
| 1242 | (not (numberp (car calculator-stack)))) | |
| 1243 | (<= inp (pcase calculator-input-radix | |
| 1244 | (`nil ?9) (`bin ?1) (`oct ?7) (_ 999)))) | |
| 1245 | (calculator-clear-fragile) | |
| 1246 | (setq calculator-curnum | |
| 1247 | (concat (if (equal calculator-curnum "0") "" | |
| 1248 | calculator-curnum) | |
| 1249 | (list (upcase inp)))) | |
| 1250 | (calculator-update-display)))) | |
| d240a249 GM |
1251 | |
| 1252 | (defun calculator-decimal () | |
| 1253 | "Enter a decimal period." | |
| 1254 | (interactive) | |
| 5335a8ce EB |
1255 | (when (and (not calculator-input-radix) |
| 1256 | (or calculator-display-fragile | |
| 1257 | (not (numberp (car calculator-stack)))) | |
| 1258 | (not (and calculator-curnum | |
| 1259 | (string-match-p "[.eE]" calculator-curnum)))) | |
| d240a249 | 1260 | ;; enter the period on the same condition as a digit, only if no |
| 25c269ef | 1261 | ;; period or exponent entered yet |
| 5335a8ce EB |
1262 | (calculator-clear-fragile) |
| 1263 | (setq calculator-curnum (concat (or calculator-curnum "0") ".")) | |
| 1264 | (calculator-update-display))) | |
| d240a249 GM |
1265 | |
| 1266 | (defun calculator-exp () | |
| 1267 | "Enter an `E' exponent character, or a digit in hex input mode." | |
| 1268 | (interactive) | |
| 5335a8ce EB |
1269 | (cond |
| 1270 | (calculator-input-radix (calculator-digit)) | |
| 1271 | ((and (or calculator-display-fragile | |
| 1272 | (not (numberp (car calculator-stack)))) | |
| 1273 | (not (and calculator-curnum | |
| 1274 | (string-match-p "[eE]" calculator-curnum)))) | |
| 1275 | ;; same condition as above, also no E so far | |
| 1276 | (calculator-clear-fragile) | |
| 1277 | (setq calculator-curnum (concat (or calculator-curnum "1") "e")) | |
| 1278 | (calculator-update-display)))) | |
| d240a249 | 1279 | |
| 86f1e1ec GM |
1280 | (defun calculator-op (&optional keys) |
| 1281 | "Enter an operator on the stack, doing all necessary reductions. | |
| 1282 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 | 1283 | (interactive) |
| 25c269ef DL |
1284 | (catch 'op-error |
| 1285 | (let* ((last-inp (calculator-last-input keys)) | |
| 1286 | (op (assoc last-inp calculator-operators))) | |
| 1287 | (calculator-clear-fragile op) | |
| 5335a8ce EB |
1288 | (calculator-push-curnum) |
| 1289 | (when (and (= 2 (calculator-op-arity op)) | |
| 1290 | (not (numberp (car calculator-stack)))) | |
| 1291 | ;; we have a binary operator but no number -- search for a | |
| 1292 | ;; prefix version | |
| 1293 | (setq op (assoc last-inp (cdr (memq op calculator-operators)))) | |
| 1294 | (unless (and op (= -1 (calculator-op-arity op))) | |
| 1295 | (calculator-message "Binary operator without a first operand") | |
| 1296 | (throw 'op-error nil))) | |
| 25c269ef DL |
1297 | (calculator-reduce-stack |
| 1298 | (cond ((eq (nth 1 op) '\() 10) | |
| 1299 | ((eq (nth 1 op) '\)) 0) | |
| 1300 | (t (calculator-op-prec op)))) | |
| 5335a8ce EB |
1301 | (when (let ((hasnum (numberp (car calculator-stack)))) |
| 1302 | (pcase (calculator-op-arity op) | |
| 1303 | (-1 hasnum) | |
| 1304 | ((or 1 2) (not hasnum)))) | |
| 1305 | (calculator-message "Incomplete expression") | |
| 1306 | (throw 'op-error nil)) | |
| 1307 | (push op calculator-stack) | |
| 25c269ef DL |
1308 | (calculator-reduce-stack (calculator-op-prec op)) |
| 1309 | (and (= (length calculator-stack) 1) | |
| 5335a8ce | 1310 | (numberp (car calculator-stack)) |
| 25c269ef DL |
1311 | ;; the display is fragile if it contains only one number |
| 1312 | (setq calculator-display-fragile t) | |
| 1313 | ;; add number to the saved-list | |
| 1314 | calculator-add-saved | |
| 1315 | (if (= 0 calculator-saved-ptr) | |
| 1316 | (setq calculator-saved-list | |
| 1317 | (cons (car calculator-stack) calculator-saved-list)) | |
| 1318 | (let ((p (nthcdr (1- calculator-saved-ptr) | |
| 1319 | calculator-saved-list))) | |
| 1320 | (setcdr p (cons (car calculator-stack) (cdr p)))))) | |
| 1321 | (calculator-update-display)))) | |
| d240a249 GM |
1322 | |
| 1323 | (defun calculator-op-or-exp () | |
| 1324 | "Either enter an operator or a digit. | |
| 25c269ef | 1325 | Used with +/- for entering them as digits in numbers like 1e-3 (there is |
| 5335a8ce EB |
1326 | no need for negative numbers since these are handled by unary |
| 1327 | operators)." | |
| d240a249 GM |
1328 | (interactive) |
| 1329 | (if (and (not calculator-display-fragile) | |
| 1330 | calculator-curnum | |
| 45fdb482 | 1331 | (string-match-p "[eE]$" calculator-curnum)) |
| d240a249 GM |
1332 | (calculator-digit) |
| 1333 | (calculator-op))) | |
| 1334 | ||
| cbb2dddb | 1335 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1336 | ;;; Input/output modes (not display) |
| 1337 | ||
| d240a249 GM |
1338 | (defun calculator-dec/deg-mode () |
| 1339 | "Set decimal mode for display & input, if decimal, toggle deg mode." | |
| 1340 | (interactive) | |
| 5335a8ce | 1341 | (calculator-push-curnum) |
| d240a249 GM |
1342 | (if (or calculator-input-radix calculator-output-radix) |
| 1343 | (progn (setq calculator-input-radix nil) | |
| 1344 | (setq calculator-output-radix nil)) | |
| 5335a8ce | 1345 | ;; already decimal -- toggle degrees mode |
| d240a249 GM |
1346 | (setq calculator-deg (not calculator-deg))) |
| 1347 | (calculator-update-display t)) | |
| 1348 | ||
| 86f1e1ec GM |
1349 | (defun calculator-radix-mode (&optional keys) |
| 1350 | "Set input and display radix modes. | |
| 1351 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 | 1352 | (interactive) |
| 86f1e1ec GM |
1353 | (calculator-radix-input-mode keys) |
| 1354 | (calculator-radix-output-mode keys)) | |
| d240a249 | 1355 | |
| 86f1e1ec GM |
1356 | (defun calculator-radix-input-mode (&optional keys) |
| 1357 | "Set input radix modes. | |
| 1358 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 | 1359 | (interactive) |
| 5335a8ce | 1360 | (calculator-push-curnum) |
| d240a249 | 1361 | (setq calculator-input-radix |
| 86f1e1ec | 1362 | (let ((inp (calculator-last-input keys))) |
| d240a249 GM |
1363 | (cdr (assq (upcase (aref inp (1- (length inp)))) |
| 1364 | calculator-char-radix)))) | |
| 1365 | (calculator-update-display)) | |
| 1366 | ||
| 86f1e1ec GM |
1367 | (defun calculator-radix-output-mode (&optional keys) |
| 1368 | "Set display radix modes. | |
| 1369 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 | 1370 | (interactive) |
| 5335a8ce | 1371 | (calculator-push-curnum) |
| d240a249 | 1372 | (setq calculator-output-radix |
| 86f1e1ec | 1373 | (let ((inp (calculator-last-input keys))) |
| d240a249 GM |
1374 | (cdr (assq (upcase (aref inp (1- (length inp)))) |
| 1375 | calculator-char-radix)))) | |
| 1376 | (calculator-update-display t)) | |
| 1377 | ||
| cbb2dddb | 1378 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1379 | ;;; Saved values list |
| 1380 | ||
| d240a249 GM |
1381 | (defun calculator-save-on-list () |
| 1382 | "Evaluate current expression, put result on the saved values list." | |
| 1383 | (interactive) | |
| 1384 | (let ((calculator-add-saved t)) ; marks the result to be added | |
| 1385 | (calculator-enter))) | |
| 1386 | ||
| 1387 | (defun calculator-clear-saved () | |
| 1388 | "Clear the list of saved values in `calculator-saved-list'." | |
| 1389 | (interactive) | |
| 1390 | (setq calculator-saved-list nil) | |
| 25c269ef | 1391 | (setq calculator-saved-ptr 0) |
| d240a249 GM |
1392 | (calculator-update-display t)) |
| 1393 | ||
| 1394 | (defun calculator-saved-move (n) | |
| 1395 | "Go N elements up the list of saved values." | |
| 1396 | (interactive) | |
| 5335a8ce EB |
1397 | (when (and calculator-saved-list |
| 1398 | (or (null calculator-stack) calculator-display-fragile)) | |
| 1399 | (setq calculator-saved-ptr | |
| 1400 | (max (min (+ n calculator-saved-ptr) | |
| 1401 | (length calculator-saved-list)) | |
| 1402 | 0)) | |
| 1403 | (if (nth calculator-saved-ptr calculator-saved-list) | |
| 1404 | (setq calculator-stack (list (nth calculator-saved-ptr | |
| 1405 | calculator-saved-list)) | |
| 1406 | calculator-display-fragile t) | |
| 1407 | (calculator-reset)) | |
| 1408 | (calculator-update-display))) | |
| d240a249 GM |
1409 | |
| 1410 | (defun calculator-saved-up () | |
| 1411 | "Go up the list of saved values." | |
| 1412 | (interactive) | |
| 1413 | (calculator-saved-move +1)) | |
| 1414 | ||
| 1415 | (defun calculator-saved-down () | |
| 1416 | "Go down the list of saved values." | |
| 1417 | (interactive) | |
| 1418 | (calculator-saved-move -1)) | |
| 1419 | ||
| cbb2dddb | 1420 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1421 | ;;; Misc functions |
| 1422 | ||
| d240a249 GM |
1423 | (defun calculator-open-paren () |
| 1424 | "Equivalents of `(' use this." | |
| 1425 | (interactive) | |
| 86f1e1ec | 1426 | (calculator-op "(")) |
| d240a249 GM |
1427 | |
| 1428 | (defun calculator-close-paren () | |
| 1429 | "Equivalents of `)' use this." | |
| 1430 | (interactive) | |
| 86f1e1ec | 1431 | (calculator-op ")")) |
| d240a249 GM |
1432 | |
| 1433 | (defun calculator-enter () | |
| 86f1e1ec | 1434 | "Evaluate current expression." |
| d240a249 | 1435 | (interactive) |
| 86f1e1ec | 1436 | (calculator-op "=")) |
| d240a249 GM |
1437 | |
| 1438 | (defun calculator-backspace () | |
| 1439 | "Backward delete a single digit or a stack element." | |
| 1440 | (interactive) | |
| 1441 | (if calculator-curnum | |
| 1442 | (setq calculator-curnum | |
| 1443 | (if (> (length calculator-curnum) 1) | |
| 1444 | (substring calculator-curnum | |
| 1445 | 0 (1- (length calculator-curnum))) | |
| 1446 | nil)) | |
| 1447 | (setq calculator-stack (cdr calculator-stack))) | |
| 1448 | (calculator-update-display)) | |
| 1449 | ||
| 1450 | (defun calculator-clear () | |
| 1451 | "Clear current number." | |
| 1452 | (interactive) | |
| 1453 | (setq calculator-curnum nil) | |
| 1454 | (cond | |
| 5335a8ce | 1455 | ;; if the current number is from the saved-list remove it |
| d240a249 GM |
1456 | ((and calculator-display-fragile |
| 1457 | calculator-saved-list | |
| 1458 | (= (car calculator-stack) | |
| 1459 | (nth calculator-saved-ptr calculator-saved-list))) | |
| 1460 | (if (= 0 calculator-saved-ptr) | |
| 1461 | (setq calculator-saved-list (cdr calculator-saved-list)) | |
| 1462 | (let ((p (nthcdr (1- calculator-saved-ptr) | |
| 1463 | calculator-saved-list))) | |
| 5335a8ce | 1464 | (setcdr p (cddr p)) |
| d240a249 GM |
1465 | (setq calculator-saved-ptr (1- calculator-saved-ptr)))) |
| 1466 | (if calculator-saved-list | |
| 1467 | (setq calculator-stack | |
| 1468 | (list (nth calculator-saved-ptr calculator-saved-list))) | |
| 1469 | (calculator-reset))) | |
| 1470 | ;; reset if fragile or double clear | |
| 1471 | ((or calculator-display-fragile (eq last-command this-command)) | |
| 1472 | (calculator-reset))) | |
| 1473 | (calculator-update-display)) | |
| 1474 | ||
| 1475 | (defun calculator-copy () | |
| 1476 | "Copy current number to the `kill-ring'." | |
| 1477 | (interactive) | |
| 4351784f GM |
1478 | (let ((calculator-displayer |
| 1479 | (or calculator-copy-displayer calculator-displayer)) | |
| 1480 | (calculator-displayers | |
| 1481 | (if calculator-copy-displayer nil calculator-displayers))) | |
| 1482 | (calculator-enter) | |
| 1214bb6e | 1483 | ;; remove trailing spaces and an index |
| 4351784f | 1484 | (let ((s (cdr calculator-stack-display))) |
| 5335a8ce EB |
1485 | (when s |
| 1486 | (kill-new (replace-regexp-in-string | |
| 1487 | "^\\([^ ]+\\) *\\(\\[[0-9/]+\\]\\)? *$" "\\1" s)))))) | |
| d240a249 GM |
1488 | |
| 1489 | (defun calculator-set-register (reg) | |
| 1490 | "Set a register value for REG." | |
| 5335a8ce EB |
1491 | ;; FIXME: this should use `register-read-with-preview', but it uses |
| 1492 | ;; calculator-registers rather than `register-alist'. (Maybe | |
| 1493 | ;; dynamically rebinding it will get blessed?) Also in to | |
| 1494 | ;; `calculator-get-register'. | |
| d240a249 GM |
1495 | (interactive "cRegister to store into: ") |
| 1496 | (let* ((as (assq reg calculator-registers)) | |
| 1497 | (val (progn (calculator-enter) (car calculator-stack)))) | |
| 1498 | (if as | |
| 1499 | (setcdr as val) | |
| 1500 | (setq calculator-registers | |
| 1501 | (cons (cons reg val) calculator-registers))) | |
| 761d3eb3 | 1502 | (calculator-message "[%c] := %S" reg val))) |
| d240a249 GM |
1503 | |
| 1504 | (defun calculator-put-value (val) | |
| 1505 | "Paste VAL as if entered. | |
| 1506 | Used by `calculator-paste' and `get-register'." | |
| 5335a8ce EB |
1507 | (when (and (numberp val) |
| 1508 | ;; (not calculator-curnum) | |
| 1509 | (or calculator-display-fragile | |
| 1510 | (not (numberp (car calculator-stack))))) | |
| 1511 | (calculator-clear-fragile) | |
| 1512 | (setq calculator-curnum (let ((calculator-displayer "%S")) | |
| 1513 | (calculator-number-to-string val))) | |
| 1514 | (calculator-update-display))) | |
| d240a249 GM |
1515 | |
| 1516 | (defun calculator-paste () | |
| 1517 | "Paste a value from the `kill-ring'." | |
| 1518 | (interactive) | |
| 1519 | (calculator-put-value | |
| 761d3eb3 RS |
1520 | (let ((str (replace-regexp-in-string |
| 1521 | "^ *\\(.+[^ ]\\) *$" "\\1" (current-kill 0)))) | |
| 1522 | (and (not calculator-input-radix) | |
| 1523 | calculator-paste-decimals | |
| cbb2dddb GM |
1524 | (string-match "\\([0-9]+\\)\\(\\.[0-9]+\\)?\\(e[0-9]+\\)?" |
| 1525 | str) | |
| 1526 | (or (match-string 1 str) | |
| 1527 | (match-string 2 str) | |
| 1528 | (match-string 3 str)) | |
| 761d3eb3 | 1529 | (setq str (concat (or (match-string 1 str) "0") |
| cbb2dddb | 1530 | (or (match-string 2 str) ".0") |
| 761d3eb3 | 1531 | (or (match-string 3 str) "")))) |
| 45fdb482 | 1532 | (ignore-errors (calculator-string-to-number str))))) |
| d240a249 GM |
1533 | |
| 1534 | (defun calculator-get-register (reg) | |
| 1535 | "Get a value from a register REG." | |
| 1536 | (interactive "cRegister to get value from: ") | |
| 1537 | (calculator-put-value (cdr (assq reg calculator-registers)))) | |
| 1538 | ||
| f440830d GM |
1539 | (declare-function electric-describe-mode "ehelp" ()) |
| 1540 | ||
| d240a249 GM |
1541 | (defun calculator-help () |
| 1542 | ;; this is used as the quick reference screen you get with `h' | |
| 1543 | "Quick reference: | |
| 1544 | * numbers/operators/parens/./e - enter expressions | |
| 1545 | + - * / \\(div) %(rem) _(-X,postfix) ;(1/X,postfix) ^(exp) L(og) | |
| 1546 | Q(sqrt) !(fact) S(in) C(os) T(an) |(or) #(xor) &(and) ~(not) | |
| 1547 | * >/< repeats last binary operation with its 2nd (1st) arg as postfix op | |
| 25c269ef DL |
1548 | * I inverses next trig function * '/\"/{} - display/display args |
| 1549 | * D - switch to all-decimal, or toggle deg/rad mode | |
| d240a249 GM |
1550 | * B/O/H/X - binary/octal/hex mode for i/o (X is a shortcut for H) |
| 1551 | * i/o - prefix for d/b/o/x - set only input/output modes | |
| 1552 | * enter/= - evaluate current expr. * s/g - set/get a register | |
| 1553 | * space - evaluate & save on list * l/v - list total/average | |
| 1554 | * up/down/C-p/C-n - browse saved * C-delete - clear all saved | |
| 86f1e1ec | 1555 | * C-insert - copy whole expr. * C-return - evaluate, copy, exit |
| d240a249 GM |
1556 | * insert - paste a number * backspace- delete backwards |
| 1557 | * delete - clear argument or list value or whole expression (twice) | |
| 1558 | * escape/q - exit." | |
| 1559 | (interactive) | |
| 1560 | (if (eq last-command 'calculator-help) | |
| 1561 | (let ((mode-name "Calculator") | |
| 1562 | (major-mode 'calculator-mode) | |
| 1563 | (g-map (current-global-map)) | |
| 1564 | (win (selected-window))) | |
| 1565 | (require 'ehelp) | |
| 5335a8ce | 1566 | (when calculator-electric-mode |
| d240a249 | 1567 | (use-global-map calculator-saved-global-map)) |
| d240a249 | 1568 | (if calculator-electric-mode |
| 5335a8ce EB |
1569 | (electric-describe-mode) |
| 1570 | (describe-mode)) | |
| 1571 | (when calculator-electric-mode (use-global-map g-map)) | |
| 1572 | (select-window win) | |
| d240a249 GM |
1573 | (message nil)) |
| 1574 | (let ((one (one-window-p t)) | |
| 1575 | (win (selected-window)) | |
| 1576 | (help-buf (get-buffer-create "*Help*"))) | |
| 1577 | (save-window-excursion | |
| 1578 | (with-output-to-temp-buffer "*Help*" | |
| 1579 | (princ (documentation 'calculator-help))) | |
| 5335a8ce EB |
1580 | (when one (shrink-window-if-larger-than-buffer |
| 1581 | (get-buffer-window help-buf))) | |
| 1582 | (message "`%s' again for more help, %s." | |
| 1583 | (calculator-last-input) | |
| 1584 | "any other key continues normally") | |
| d240a249 GM |
1585 | (select-window win) |
| 1586 | (sit-for 360)) | |
| 1587 | (select-window win)))) | |
| 1588 | ||
| 1589 | (defun calculator-quit () | |
| 1590 | "Quit calculator." | |
| 1591 | (interactive) | |
| 1592 | (set-buffer calculator-buffer) | |
| 1593 | (let ((inhibit-read-only t)) (erase-buffer)) | |
| 45fdb482 JB |
1594 | (unless calculator-electric-mode |
| 1595 | (ignore-errors | |
| 1596 | (while (get-buffer-window calculator-buffer) | |
| 5335a8ce EB |
1597 | (delete-window (get-buffer-window calculator-buffer))))) |
| 1598 | (kill-buffer calculator-buffer) | |
| d240a249 | 1599 | (message "Calculator done.") |
| 5335a8ce EB |
1600 | (if calculator-electric-mode |
| 1601 | (throw 'calculator-done nil) ; will kill the buffer | |
| 1602 | (setq calculator-buffer nil))) | |
| d240a249 GM |
1603 | |
| 1604 | (defun calculator-save-and-quit () | |
| 1605 | "Quit the calculator, saving the result on the `kill-ring'." | |
| 1606 | (interactive) | |
| 1607 | (calculator-enter) | |
| 1608 | (calculator-copy) | |
| 1609 | (calculator-quit)) | |
| 1610 | ||
| d240a249 | 1611 | (defun calculator-repR (x) |
| a1ff7705 | 1612 | "Repeat the last binary operation with its second argument and X. |
| d240a249 GM |
1613 | To use this, apply a binary operator (evaluate it), then call this." |
| 1614 | (if calculator-last-opXY | |
| 1615 | ;; avoid rebinding calculator-last-opXY | |
| 1616 | (let ((calculator-last-opXY calculator-last-opXY)) | |
| 1617 | (calculator-funcall | |
| 1618 | (car calculator-last-opXY) x (nth 2 calculator-last-opXY))) | |
| 1619 | x)) | |
| 1620 | ||
| 1621 | (defun calculator-repL (x) | |
| a1ff7705 | 1622 | "Repeat the last binary operation with its first argument and X. |
| d240a249 GM |
1623 | To use this, apply a binary operator (evaluate it), then call this." |
| 1624 | (if calculator-last-opXY | |
| 1625 | ;; avoid rebinding calculator-last-opXY | |
| 1626 | (let ((calculator-last-opXY calculator-last-opXY)) | |
| 1627 | (calculator-funcall | |
| 1628 | (car calculator-last-opXY) (nth 1 calculator-last-opXY) x)) | |
| 1629 | x)) | |
| 1630 | ||
| f50347a9 JB |
1631 | (defun calculator-expt (x y) |
| 1632 | "Compute X^Y, dealing with errors appropriately." | |
| 45fdb482 | 1633 | (condition-case nil |
| f50347a9 JB |
1634 | (expt x y) |
| 1635 | (domain-error 0.0e+NaN) | |
| 1636 | (range-error | |
| 5335a8ce EB |
1637 | (cond ((and (< x 1.0) (> x -1.0)) |
| 1638 | ;; For small x, the range error comes from large y. | |
| 1639 | 0.0) | |
| 1640 | ((and (> x 0.0) (< y 0.0)) | |
| 1641 | ;; For large positive x and negative y, the range error | |
| 1642 | ;; comes from large negative y. | |
| 1643 | 0.0) | |
| 1644 | ((and (> x 0.0) (> y 0.0)) | |
| 1645 | ;; For large positive x and positive y, the range error | |
| 1646 | ;; comes from large y. | |
| 1647 | 1.0e+INF) | |
| 1648 | ;; For the rest, x must be large and negative. | |
| 1649 | ;; The range errors come from large integer y. | |
| 1650 | ((< y 0.0) | |
| 1651 | 0.0) | |
| 1652 | ((eq (logand (truncate y) 1) 1) ; expansion of cl `oddp' | |
| 1653 | ;; If y is odd | |
| 1654 | -1.0e+INF) | |
| 1655 | (t | |
| 1656 | ;; | |
| 1657 | 1.0e+INF))) | |
| f50347a9 JB |
1658 | (error 0.0e+NaN))) |
| 1659 | ||
| d240a249 GM |
1660 | (defun calculator-fact (x) |
| 1661 | "Simple factorial of X." | |
| 5335a8ce EB |
1662 | (cond ((>= x 1.0e+INF) x) |
| 1663 | ((or (and (floatp x) (isnan x)) (< x 0)) 0.0e+NaN) | |
| 1664 | ((>= (calculator-expt (/ x 3.0) x) 1.0e+INF) 1.0e+INF) | |
| 1665 | (t (let ((x (truncate x)) (r 1.0)) | |
| 1666 | (while (> x 0) (setq r (* r x) x (1- x))) | |
| 1667 | r)))) | |
| d240a249 GM |
1668 | |
| 1669 | (defun calculator-truncate (n) | |
| 1670 | "Truncate N, return 0 in case of overflow." | |
| 5335a8ce | 1671 | (condition-case nil (truncate n) (range-error 0))) |
| d240a249 GM |
1672 | |
| 1673 | ||
| 1674 | (provide 'calculator) | |
| 1675 | ||
| 1676 | ;;; calculator.el ends here |