HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| e8af40ee | 1 | ;;; calculator.el --- a [not so] simple calculator for Emacs |
| d240a249 | 2 | |
| 0d30b337 | 3 | ;; Copyright (C) 1998, 2000, 2001, 2002, 2003, 2004, |
| aaef169d | 4 | ;; 2005, 2006 Free Software Foundation, Inc. |
| d240a249 | 5 | |
| 4ece8d61 | 6 | ;; Author: Eli Barzilay <eli@barzilay.org> |
| d240a249 | 7 | ;; Keywords: tools, convenience |
| aaef169d | 8 | ;; Time-stamp: <2006-02-06 13:36:00 ttn> |
| d240a249 GM |
9 | |
| 10 | ;; This file is part of GNU Emacs. | |
| 11 | ||
| 12 | ;; GNU Emacs is free software; you can redistribute it and/or modify it | |
| 13 | ;; under the terms of the GNU General Public License as published by the | |
| 14 | ;; Free Software Foundation; either version 2, or (at your option) any | |
| 15 | ;; later version. | |
| 16 | ||
| 17 | ;; GNU Emacs is distributed in the hope that it will be useful, but | |
| 18 | ;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 20 | ;; General Public License for more details. | |
| 21 | ||
| 22 | ;; You should have received a copy of the GNU General Public License | |
| 23 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
| 086add15 LK |
24 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| 25 | ;; MA 02110-1301, USA. | |
| d240a249 | 26 | |
| cbb2dddb | 27 | ;;;===================================================================== |
| d240a249 GM |
28 | ;;; Commentary: |
| 29 | ;; | |
| 25c269ef | 30 | ;; A calculator for Emacs. |
| 5ca425fc | 31 | ;; Why should you reach for your mouse to get xcalc (calc.exe, gcalc or |
| 25c269ef | 32 | ;; whatever), when you have Emacs running already? |
| d240a249 GM |
33 | ;; |
| 34 | ;; If this is not part of your Emacs distribution, then simply bind | |
| 35 | ;; `calculator' to a key and make it an autoloaded function, e.g.: | |
| 36 | ;; (autoload 'calculator "calculator" | |
| 25c269ef | 37 | ;; "Run the Emacs calculator." t) |
| d240a249 GM |
38 | ;; (global-set-key [(control return)] 'calculator) |
| 39 | ;; | |
| 25c269ef DL |
40 | ;; Written by Eli Barzilay: Maze is Life! eli@barzilay.org |
| 41 | ;; http://www.barzilay.org/ | |
| d240a249 GM |
42 | ;; |
| 43 | ;; For latest version, check | |
| 25c269ef | 44 | ;; http://www.barzilay.org/misc/calculator.el |
| 4351784f GM |
45 | ;; |
| 46 | ||
| 47 | ;;; History: | |
| 48 | ;; I hate history. | |
| d240a249 GM |
49 | |
| 50 | (eval-and-compile | |
| 51 | (if (fboundp 'defgroup) nil | |
| 52 | (defmacro defgroup (&rest forms) nil) | |
| 53 | (defmacro defcustom (s v d &rest r) (list 'defvar s v d)))) | |
| 54 | ||
| cbb2dddb | 55 | ;;;===================================================================== |
| d240a249 GM |
56 | ;;; Customization: |
| 57 | ||
| 58 | (defgroup calculator nil | |
| 25c269ef | 59 | "Simple Emacs calculator." |
| d240a249 | 60 | :prefix "calculator" |
| 7def2f92 | 61 | :version "21.1" |
| d240a249 GM |
62 | :group 'tools |
| 63 | :group 'convenience) | |
| 64 | ||
| 65 | (defcustom calculator-electric-mode nil | |
| 66 | "*Run `calculator' electrically, in the echo area. | |
| 25c269ef DL |
67 | Electric mode saves some place but changes the way you interact with the |
| 68 | calculator." | |
| d240a249 GM |
69 | :type 'boolean |
| 70 | :group 'calculator) | |
| 71 | ||
| 86f1e1ec GM |
72 | (defcustom calculator-use-menu t |
| 73 | "*Make `calculator' create a menu. | |
| 74 | Note that this requires easymenu. Must be set before loading." | |
| 75 | :type 'boolean | |
| 76 | :group 'calculator) | |
| 77 | ||
| d240a249 GM |
78 | (defcustom calculator-bind-escape nil |
| 79 | "*If non-nil, set escape to exit the calculator." | |
| 80 | :type 'boolean | |
| 81 | :group 'calculator) | |
| 82 | ||
| 83 | (defcustom calculator-unary-style 'postfix | |
| 84 | "*Value is either 'prefix or 'postfix. | |
| 85 | This determines the default behavior of unary operators." | |
| 86 | :type '(choice (const prefix) (const postfix)) | |
| 87 | :group 'calculator) | |
| 88 | ||
| 25c269ef DL |
89 | (defcustom calculator-prompt "Calc=%s> " |
| 90 | "*The prompt used by the Emacs calculator. | |
| d240a249 GM |
91 | It should contain a \"%s\" somewhere that will indicate the i/o radixes, |
| 92 | this string will be a two-character string as described in the | |
| 93 | documentation for `calculator-mode'." | |
| 94 | :type 'string | |
| 95 | :group 'calculator) | |
| 96 | ||
| 25c269ef DL |
97 | (defcustom calculator-number-digits 3 |
| 98 | "*The calculator's number of digits used for standard display. | |
| 99 | Used by the `calculator-standard-display' function - it will use the | |
| 100 | format string \"%.NC\" where this number is N and C is a character given | |
| 101 | at runtime." | |
| 2826ac81 | 102 | :type 'integer |
| d240a249 GM |
103 | :group 'calculator) |
| 104 | ||
| 761d3eb3 RS |
105 | (defcustom calculator-radix-grouping-mode t |
| 106 | "*Use digit grouping in radix output mode. | |
| 107 | If this is set, chunks of `calculator-radix-grouping-digits' characters | |
| 108 | will be separated by `calculator-radix-grouping-separator' when in radix | |
| f5307782 JB |
109 | output mode is active (determined by `calculator-output-radix')." |
| 110 | :type 'boolean | |
| 111 | :group 'calculator) | |
| 761d3eb3 RS |
112 | |
| 113 | (defcustom calculator-radix-grouping-digits 4 | |
| 114 | "*The number of digits used for grouping display in radix modes. | |
| f5307782 JB |
115 | See `calculator-radix-grouping-mode'." |
| 116 | :type 'integer | |
| 117 | :group 'calculator) | |
| 761d3eb3 RS |
118 | |
| 119 | (defcustom calculator-radix-grouping-separator "'" | |
| 120 | "*The separator used in radix grouping display. | |
| f5307782 JB |
121 | See `calculator-radix-grouping-mode'." |
| 122 | :type 'string | |
| 123 | :group 'calculator) | |
| 761d3eb3 | 124 | |
| 25c269ef DL |
125 | (defcustom calculator-remove-zeros t |
| 126 | "*Non-nil value means delete all redundant zero decimal digits. | |
| 127 | If this value is not t, and not nil, redundant zeros are removed except | |
| 128 | for one and if it is nil, nothing is removed. | |
| 129 | Used by the `calculator-remove-zeros' function." | |
| 130 | :type '(choice (const t) (const leave-decimal) (const nil)) | |
| d240a249 GM |
131 | :group 'calculator) |
| 132 | ||
| 25c269ef DL |
133 | (defcustom calculator-displayer '(std ?n) |
| 134 | "*A displayer specification for numerical values. | |
| 135 | This is the displayer used to show all numbers in an expression. Result | |
| 136 | values will be displayed according to the first element of | |
| 137 | `calculator-displayers'. | |
| 138 | ||
| 139 | The displayer is a symbol, a string or an expression. A symbol should | |
| 140 | be the name of a one-argument function, a string is used with a single | |
| 141 | argument and an expression will be evaluated with the variable `num' | |
| 142 | bound to whatever should be displayed. If it is a function symbol, it | |
| 143 | should be able to handle special symbol arguments, currently 'left and | |
| 144 | 'right which will be sent by special keys to modify display parameters | |
| 145 | associated with the displayer function (for example to change the number | |
| 146 | of digits displayed). | |
| 147 | ||
| 148 | An exception to the above is the case of the list (std C) where C is a | |
| 149 | character, in this case the `calculator-standard-displayer' function | |
| f5307782 JB |
150 | will be used with this character for a format string." |
| 151 | :group 'calculator) | |
| 25c269ef DL |
152 | |
| 153 | (defcustom calculator-displayers | |
| 2188f2d4 | 154 | '(((std ?n) "Standard display, decimal point or scientific") |
| 25c269ef DL |
155 | (calculator-eng-display "Eng display") |
| 156 | ((std ?f) "Standard display, decimal point") | |
| 2188f2d4 | 157 | ((std ?e) "Standard display, scientific") |
| 25c269ef DL |
158 | ("%S" "Emacs printer")) |
| 159 | "*A list of displayers. | |
| 160 | Each element is a list of a displayer and a description string. The | |
| 2188f2d4 | 161 | first element is the one which is currently used, this is for the display |
| 25c269ef DL |
162 | of result values not values in expressions. A displayer specification |
| 163 | is the same as the values that can be stored in `calculator-displayer'. | |
| 164 | ||
| 165 | `calculator-rotate-displayer' rotates this list." | |
| 166 | :type 'sexp | |
| d240a249 GM |
167 | :group 'calculator) |
| 168 | ||
| 25c269ef DL |
169 | (defcustom calculator-paste-decimals t |
| 170 | "*If non-nil, convert pasted integers so they have a decimal point. | |
| 171 | This makes it possible to paste big integers since they will be read as | |
| 172 | floats, otherwise the Emacs reader will fail on them." | |
| d240a249 GM |
173 | :type 'boolean |
| 174 | :group 'calculator) | |
| 175 | ||
| 4351784f GM |
176 | (defcustom calculator-copy-displayer nil |
| 177 | "*If non-nil, this is any value that can be used for | |
| 178 | `calculator-displayer', to format a string before copying it with | |
| 179 | `calculator-copy'. If nil, then `calculator-displayer's normal value is | |
| f5307782 JB |
180 | used." |
| 181 | :type 'boolean | |
| 182 | :group 'calculator) | |
| 4351784f | 183 | |
| d240a249 GM |
184 | (defcustom calculator-2s-complement nil |
| 185 | "*If non-nil, show negative numbers in 2s complement in radix modes. | |
| 186 | Otherwise show as a negative number." | |
| 187 | :type 'boolean | |
| 188 | :group 'calculator) | |
| 189 | ||
| 190 | (defcustom calculator-mode-hook nil | |
| 761d3eb3 RS |
191 | "*List of hook functions for `calculator-mode' to run. |
| 192 | Note: if `calculator-electric-mode' is on, then this hook will get | |
| 193 | activated in the minibuffer - in that case it should not do much more | |
| 194 | than local key settings and other effects that will change things | |
| 195 | outside the scope of calculator related code." | |
| d240a249 GM |
196 | :type 'hook |
| 197 | :group 'calculator) | |
| 198 | ||
| 199 | (defcustom calculator-user-registers nil | |
| 200 | "*An association list of user-defined register bindings. | |
| d240a249 GM |
201 | Each element in this list is a list of a character and a number that |
| 202 | will be stored in that character's register. | |
| 203 | ||
| 204 | For example, use this to define the golden ratio number: | |
| 25c269ef DL |
205 | (setq calculator-user-registers '((?g . 1.61803398875))) |
| 206 | before you load calculator." | |
| d240a249 GM |
207 | :type '(repeat (cons character number)) |
| 208 | :set '(lambda (_ val) | |
| 209 | (and (boundp 'calculator-registers) | |
| 210 | (setq calculator-registers | |
| 211 | (append val calculator-registers))) | |
| 212 | (setq calculator-user-registers val)) | |
| 213 | :group 'calculator) | |
| 214 | ||
| 215 | (defcustom calculator-user-operators nil | |
| 216 | "*A list of additional operators. | |
| d240a249 GM |
217 | This is a list in the same format as specified in the documentation for |
| 218 | `calculator-operators', that you can use to bind additional calculator | |
| 219 | operators. It is probably not a good idea to modify this value with | |
| 220 | `customize' since it is too complex... | |
| 221 | ||
| 222 | Examples: | |
| 223 | ||
| 7def2f92 DL |
224 | * A very simple one, adding a postfix \"x-to-y\" conversion keys, using |
| 225 | t as a prefix key: | |
| d240a249 GM |
226 | |
| 227 | (setq calculator-user-operators | |
| 228 | '((\"tf\" cl-to-fr (+ 32 (/ (* X 9) 5)) 1) | |
| 229 | (\"tc\" fr-to-cl (/ (* (- X 32) 5) 9) 1) | |
| 230 | (\"tp\" kg-to-lb (/ X 0.453592) 1) | |
| 231 | (\"tk\" lb-to-kg (* X 0.453592) 1) | |
| 232 | (\"tF\" mt-to-ft (/ X 0.3048) 1) | |
| 233 | (\"tM\" ft-to-mt (* X 0.3048) 1))) | |
| 234 | ||
| 235 | * Using a function-like form is very simple, X for an argument (Y the | |
| 236 | second in case of a binary operator), TX is a truncated version of X | |
| 237 | and F does a recursive call, Here is a [very inefficient] Fibonacci | |
| 238 | number calculation: | |
| 239 | ||
| 240 | (add-to-list 'calculator-user-operators | |
| 241 | '(\"F\" fib (if (<= TX 1) | |
| 25c269ef DL |
242 | 1 |
| 243 | (+ (F (- TX 1)) (F (- TX 2)))) 0)) | |
| d240a249 GM |
244 | |
| 245 | Note that this will be either postfix or prefix, according to | |
| 246 | `calculator-unary-style'." | |
| 247 | :type '(repeat (list string symbol sexp integer integer)) | |
| 248 | :group 'calculator) | |
| 249 | ||
| cbb2dddb | 250 | ;;;===================================================================== |
| d240a249 GM |
251 | ;;; Code: |
| 252 | ||
| cbb2dddb | 253 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
254 | ;;; Variables |
| 255 | ||
| d240a249 | 256 | (defvar calculator-initial-operators |
| 86f1e1ec GM |
257 | '(;; "+"/"-" have keybindings of themselves, not calculator-ops |
| 258 | ("=" = identity 1 -1) | |
| 25c269ef DL |
259 | (nobind "+" + + 2 4) |
| 260 | (nobind "-" - - 2 4) | |
| 261 | (nobind "+" + + -1 9) | |
| 262 | (nobind "-" - - -1 9) | |
| 86f1e1ec GM |
263 | ("(" \( identity -1 -1) |
| 264 | (")" \) identity +1 10) | |
| d240a249 GM |
265 | ;; normal keys |
| 266 | ("|" or (logior TX TY) 2 2) | |
| 267 | ("#" xor (logxor TX TY) 2 2) | |
| 268 | ("&" and (logand TX TY) 2 3) | |
| 269 | ("*" * * 2 5) | |
| 270 | ("/" / / 2 5) | |
| 271 | ("\\" div (/ TX TY) 2 5) | |
| 272 | ("%" rem (% TX TY) 2 5) | |
| 273 | ("L" log log 2 6) | |
| 274 | ("S" sin (sin DX) x 6) | |
| 275 | ("C" cos (cos DX) x 6) | |
| 276 | ("T" tan (tan DX) x 6) | |
| 277 | ("IS" asin (D (asin X)) x 6) | |
| 278 | ("IC" acos (D (acos X)) x 6) | |
| 279 | ("IT" atan (D (atan X)) x 6) | |
| 280 | ("Q" sqrt sqrt x 7) | |
| 281 | ("^" ^ expt 2 7) | |
| 282 | ("!" ! calculator-fact x 7) | |
| 283 | (";" 1/ (/ 1 X) 1 7) | |
| 284 | ("_" - - 1 8) | |
| 285 | ("~" ~ (lognot TX) x 8) | |
| 286 | (">" repR calculator-repR 1 8) | |
| 287 | ("<" repL calculator-repL 1 8) | |
| 288 | ("v" avg (/ (apply '+ L) (length L)) 0 8) | |
| 289 | ("l" tot (apply '+ L) 0 8) | |
| 290 | ) | |
| 291 | "A list of initial operators. | |
| d240a249 GM |
292 | This is a list in the same format as `calculator-operators'. Whenever |
| 293 | `calculator' starts, it looks at the value of this variable, and if it | |
| 294 | is not empty, its contents is prepended to `calculator-operators' and | |
| 295 | the appropriate key bindings are made. | |
| 296 | ||
| 297 | This variable is then reset to nil. Don't use this if you want to add | |
| 298 | user-defined operators, use `calculator-user-operators' instead.") | |
| 299 | ||
| 300 | (defvar calculator-operators nil | |
| 301 | "The calculator operators, each a list with: | |
| 302 | ||
| 303 | 1. The key that is bound to for this operation (usually a string); | |
| 304 | ||
| 305 | 2. The displayed symbol for this function; | |
| 306 | ||
| 307 | 3. The function symbol, or a form that uses the variables `X' and `Y', | |
| 308 | (if it is a binary operator), `TX' and `TY' (truncated integer | |
| 309 | versions), `DX' (converted to radians if degrees mode is on), `D' | |
| 310 | (function for converting radians to degrees if deg mode is on), `L' | |
| 311 | (list of saved values), `F' (function for recursive iteration calls) | |
| 312 | and evaluates to the function value - these variables are capital; | |
| 313 | ||
| 25c269ef DL |
314 | 4. The function's arity, optional, one of: 2 => binary, -1 => prefix |
| 315 | unary, +1 => postfix unary, 0 => a 0-arg operator func, non-number => | |
| 316 | postfix/prefix as determined by `calculator-unary-style' (the | |
| 317 | default); | |
| d240a249 | 318 | |
| 25c269ef DL |
319 | 5. The function's precedence - should be in the range of 1 (lowest) to |
| 320 | 9 (highest) (optional, defaults to 1); | |
| d240a249 GM |
321 | |
| 322 | It it possible have a unary prefix version of a binary operator if it | |
| 323 | comes later in this list. If the list begins with the symbol 'nobind, | |
| 324 | then no key binding will take place - this is only useful for predefined | |
| 325 | keys. | |
| 326 | ||
| 327 | Use `calculator-user-operators' to add operators to this list, see its | |
| 328 | documentation for an example.") | |
| 329 | ||
| 330 | (defvar calculator-stack nil | |
| 331 | "Stack contents - operations and operands.") | |
| 332 | ||
| 333 | (defvar calculator-curnum nil | |
| 334 | "Current number being entered (as a string).") | |
| 335 | ||
| 336 | (defvar calculator-stack-display nil | |
| 337 | "Cons of the stack and its string representation.") | |
| 338 | ||
| 339 | (defvar calculator-char-radix | |
| 340 | '((?D . nil) (?B . bin) (?O . oct) (?H . hex) (?X . hex)) | |
| 341 | "A table to convert input characters to corresponding radix symbols.") | |
| 342 | ||
| 343 | (defvar calculator-output-radix nil | |
| 344 | "The mode for display, one of: nil (decimal), 'bin, 'oct or 'hex.") | |
| 345 | ||
| 346 | (defvar calculator-input-radix nil | |
| 347 | "The mode for input, one of: nil (decimal), 'bin, 'oct or 'hex.") | |
| 348 | ||
| 349 | (defvar calculator-deg nil | |
| 350 | "Non-nil if trig functions operate on degrees instead of radians.") | |
| 351 | ||
| 352 | (defvar calculator-saved-list nil | |
| 353 | "A list of saved values collected.") | |
| 354 | ||
| 355 | (defvar calculator-saved-ptr 0 | |
| 356 | "The pointer to the current saved number.") | |
| 357 | ||
| 358 | (defvar calculator-add-saved nil | |
| 359 | "Bound to t when a value should be added to the saved-list.") | |
| 360 | ||
| 361 | (defvar calculator-display-fragile nil | |
| 362 | "When non-nil, we see something that the next digit should replace.") | |
| 363 | ||
| 364 | (defvar calculator-buffer nil | |
| 365 | "The current calculator buffer.") | |
| 366 | ||
| 25c269ef DL |
367 | (defvar calculator-eng-extra nil |
| 368 | "Internal value used by `calculator-eng-display'.") | |
| 369 | ||
| 370 | (defvar calculator-eng-tmp-show nil | |
| 371 | "Internal value used by `calculator-eng-display'.") | |
| 372 | ||
| d240a249 GM |
373 | (defvar calculator-last-opXY nil |
| 374 | "The last binary operation and its arguments. | |
| 375 | Used for repeating operations in calculator-repR/L.") | |
| 376 | ||
| 377 | (defvar calculator-registers ; use user-bindings first | |
| 378 | (append calculator-user-registers (list (cons ?e e) (cons ?p pi))) | |
| 379 | "The association list of calculator register values.") | |
| 380 | ||
| 381 | (defvar calculator-saved-global-map nil | |
| 382 | "Saved global key map.") | |
| 383 | ||
| 86f1e1ec | 384 | (defvar calculator-restart-other-mode nil |
| 25c269ef DL |
385 | "Used to hack restarting with the electric mode changed.") |
| 386 | ||
| cbb2dddb | 387 | ;;;--------------------------------------------------------------------- |
| 25c269ef | 388 | ;;; Key bindings |
| 86f1e1ec | 389 | |
| d240a249 GM |
390 | (defvar calculator-mode-map nil |
| 391 | "The calculator key map.") | |
| 392 | ||
| 393 | (or calculator-mode-map | |
| 86f1e1ec | 394 | (let ((map (make-sparse-keymap))) |
| d240a249 GM |
395 | (suppress-keymap map t) |
| 396 | (define-key map "i" nil) | |
| 397 | (define-key map "o" nil) | |
| 86f1e1ec | 398 | (let ((p |
| 25c269ef DL |
399 | '((calculator-open-paren "[") |
| 400 | (calculator-close-paren "]") | |
| 401 | (calculator-op-or-exp "+" "-" [kp-add] [kp-subtract]) | |
| 402 | (calculator-digit "0" "1" "2" "3" "4" "5" "6" "7" "8" | |
| 403 | "9" "a" "b" "c" "d" "f" | |
| 404 | [kp-0] [kp-1] [kp-2] [kp-3] [kp-4] | |
| 405 | [kp-5] [kp-6] [kp-7] [kp-8] [kp-9]) | |
| 406 | (calculator-op [kp-divide] [kp-multiply]) | |
| 407 | (calculator-decimal "." [kp-decimal]) | |
| 408 | (calculator-exp "e") | |
| 86f1e1ec GM |
409 | (calculator-dec/deg-mode "D") |
| 410 | (calculator-set-register "s") | |
| 411 | (calculator-get-register "g") | |
| 412 | (calculator-radix-mode "H" "X" "O" "B") | |
| 413 | (calculator-radix-input-mode "id" "ih" "ix" "io" "ib" | |
| 414 | "iD" "iH" "iX" "iO" "iB") | |
| 415 | (calculator-radix-output-mode "od" "oh" "ox" "oo" "ob" | |
| 416 | "oD" "oH" "oX" "oO" "oB") | |
| 25c269ef DL |
417 | (calculator-rotate-displayer "'") |
| 418 | (calculator-rotate-displayer-back "\"") | |
| 761d3eb3 | 419 | (calculator-displayer-prev "{") |
| 4351784f | 420 | (calculator-displayer-next "}") |
| 86f1e1ec GM |
421 | (calculator-saved-up [up] [?\C-p]) |
| 422 | (calculator-saved-down [down] [?\C-n]) | |
| 423 | (calculator-quit "q" [?\C-g]) | |
| 25c269ef DL |
424 | (calculator-enter [enter] [linefeed] [kp-enter] |
| 425 | [return] [?\r] [?\n]) | |
| 86f1e1ec GM |
426 | (calculator-save-on-list " " [space]) |
| 427 | (calculator-clear-saved [?\C-c] [(control delete)]) | |
| 428 | (calculator-save-and-quit [(control return)] | |
| 429 | [(control kp-enter)]) | |
| cbb2dddb | 430 | (calculator-paste [insert] [(shift insert)] |
| 761d3eb3 | 431 | [paste] [mouse-2] [?\C-y]) |
| 86f1e1ec GM |
432 | (calculator-clear [delete] [?\C-?] [?\C-d]) |
| 433 | (calculator-help [?h] [??] [f1] [help]) | |
| 761d3eb3 | 434 | (calculator-copy [(control insert)] [copy]) |
| 86f1e1ec GM |
435 | (calculator-backspace [backspace]) |
| 436 | ))) | |
| d240a249 | 437 | (while p |
| 86f1e1ec GM |
438 | ;; reverse the keys so first defs come last - makes the more |
| 439 | ;; sensible bindings visible in the menu | |
| 440 | (let ((func (car (car p))) (keys (reverse (cdr (car p))))) | |
| 441 | (while keys | |
| 442 | (define-key map (car keys) func) | |
| 443 | (setq keys (cdr keys)))) | |
| d240a249 GM |
444 | (setq p (cdr p)))) |
| 445 | (if calculator-bind-escape | |
| 446 | (progn (define-key map [?\e] 'calculator-quit) | |
| 447 | (define-key map [escape] 'calculator-quit)) | |
| 448 | (define-key map [?\e ?\e ?\e] 'calculator-quit)) | |
| 449 | ;; make C-h work in text-mode | |
| 450 | (or window-system (define-key map [?\C-h] 'calculator-backspace)) | |
| 86f1e1ec GM |
451 | ;; set up a menu |
| 452 | (if (and calculator-use-menu (not (boundp 'calculator-menu))) | |
| 453 | (let ((radix-selectors | |
| 454 | (mapcar (lambda (x) | |
| 455 | `([,(nth 0 x) | |
| 456 | (calculator-radix-mode ,(nth 2 x)) | |
| 457 | :style radio | |
| 458 | :keys ,(nth 2 x) | |
| 459 | :selected | |
| 460 | (and | |
| 461 | (eq calculator-input-radix ',(nth 1 x)) | |
| 462 | (eq calculator-output-radix ',(nth 1 x)))] | |
| 463 | [,(concat (nth 0 x) " Input") | |
| 464 | (calculator-radix-input-mode ,(nth 2 x)) | |
| 465 | :keys ,(concat "i" (downcase (nth 2 x))) | |
| 466 | :style radio | |
| 467 | :selected | |
| 468 | (eq calculator-input-radix ',(nth 1 x))] | |
| 469 | [,(concat (nth 0 x) " Output") | |
| 470 | (calculator-radix-output-mode ,(nth 2 x)) | |
| 471 | :keys ,(concat "o" (downcase (nth 2 x))) | |
| 472 | :style radio | |
| 473 | :selected | |
| 474 | (eq calculator-output-radix ',(nth 1 x))])) | |
| 475 | '(("Decimal" nil "D") | |
| 476 | ("Binary" bin "B") | |
| 477 | ("Octal" oct "O") | |
| 478 | ("Hexadecimal" hex "H")))) | |
| 479 | (op '(lambda (name key) | |
| 480 | `[,name (calculator-op ,key) :keys ,key]))) | |
| 481 | (easy-menu-define | |
| 482 | calculator-menu map "Calculator menu." | |
| 483 | `("Calculator" | |
| 484 | ["Help" | |
| 485 | (let ((last-command 'calculator-help)) (calculator-help)) | |
| 486 | :keys "?"] | |
| 487 | "---" | |
| 488 | ["Copy" calculator-copy] | |
| 489 | ["Paste" calculator-paste] | |
| 490 | "---" | |
| 491 | ["Electric mode" | |
| 492 | (progn (calculator-quit) | |
| 493 | (setq calculator-restart-other-mode t) | |
| 494 | (run-with-timer 0.1 nil '(lambda () (message nil))) | |
| 495 | ;; the message from the menu will be visible, | |
| 496 | ;; couldn't make it go away... | |
| 497 | (calculator)) | |
| 498 | :active (not calculator-electric-mode)] | |
| 499 | ["Normal mode" | |
| 500 | (progn (setq calculator-restart-other-mode t) | |
| 501 | (calculator-quit)) | |
| 502 | :active calculator-electric-mode] | |
| 503 | "---" | |
| 504 | ("Functions" | |
| 505 | ,(funcall op "Repeat-right" ">") | |
| 506 | ,(funcall op "Repeat-left" "<") | |
| 507 | "------General------" | |
| 508 | ,(funcall op "Reciprocal" ";") | |
| 509 | ,(funcall op "Log" "L") | |
| 510 | ,(funcall op "Square-root" "Q") | |
| 511 | ,(funcall op "Factorial" "!") | |
| 512 | "------Trigonometric------" | |
| 513 | ,(funcall op "Sinus" "S") | |
| 514 | ,(funcall op "Cosine" "C") | |
| 515 | ,(funcall op "Tangent" "T") | |
| 516 | ,(funcall op "Inv-Sinus" "IS") | |
| 517 | ,(funcall op "Inv-Cosine" "IC") | |
| 518 | ,(funcall op "Inv-Tangent" "IT") | |
| 519 | "------Bitwise------" | |
| 520 | ,(funcall op "Or" "|") | |
| 521 | ,(funcall op "Xor" "#") | |
| 522 | ,(funcall op "And" "&") | |
| 523 | ,(funcall op "Not" "~")) | |
| 524 | ("Saved List" | |
| 525 | ["Eval+Save" calculator-save-on-list] | |
| 526 | ["Prev number" calculator-saved-up] | |
| 527 | ["Next number" calculator-saved-down] | |
| 528 | ["Delete current" calculator-clear | |
| 529 | :active (and calculator-display-fragile | |
| 530 | calculator-saved-list | |
| 531 | (= (car calculator-stack) | |
| 532 | (nth calculator-saved-ptr | |
| 533 | calculator-saved-list)))] | |
| 534 | ["Delete all" calculator-clear-saved] | |
| 535 | "---" | |
| 536 | ,(funcall op "List-total" "l") | |
| 537 | ,(funcall op "List-average" "v")) | |
| 538 | ("Registers" | |
| 539 | ["Get register" calculator-get-register] | |
| 540 | ["Set register" calculator-set-register]) | |
| 541 | ("Modes" | |
| 542 | ["Radians" | |
| 543 | (progn | |
| 544 | (and (or calculator-input-radix calculator-output-radix) | |
| 545 | (calculator-radix-mode "D")) | |
| 546 | (and calculator-deg (calculator-dec/deg-mode))) | |
| 547 | :keys "D" | |
| 548 | :style radio | |
| 549 | :selected (not (or calculator-input-radix | |
| 550 | calculator-output-radix | |
| 551 | calculator-deg))] | |
| 552 | ["Degrees" | |
| 553 | (progn | |
| 554 | (and (or calculator-input-radix calculator-output-radix) | |
| 555 | (calculator-radix-mode "D")) | |
| 556 | (or calculator-deg (calculator-dec/deg-mode))) | |
| 557 | :keys "D" | |
| 558 | :style radio | |
| 559 | :selected (and calculator-deg | |
| 560 | (not (or calculator-input-radix | |
| 561 | calculator-output-radix)))] | |
| 562 | "---" | |
| 563 | ,@(mapcar 'car radix-selectors) | |
| 564 | ("Seperate I/O" | |
| 565 | ,@(mapcar (lambda (x) (nth 1 x)) radix-selectors) | |
| 566 | "---" | |
| 567 | ,@(mapcar (lambda (x) (nth 2 x)) radix-selectors))) | |
| 761d3eb3 | 568 | ("Decimal Display" |
| 25c269ef DL |
569 | ,@(mapcar (lambda (d) |
| 570 | (vector (cadr d) | |
| 571 | ;; Note: inserts actual object here | |
| 572 | `(calculator-rotate-displayer ',d))) | |
| 573 | calculator-displayers) | |
| 574 | "---" | |
| 4351784f GM |
575 | ["Change Prev Display" calculator-displayer-prev] |
| 576 | ["Change Next Display" calculator-displayer-next]) | |
| 86f1e1ec GM |
577 | "---" |
| 578 | ["Copy+Quit" calculator-save-and-quit] | |
| 579 | ["Quit" calculator-quit])))) | |
| d240a249 GM |
580 | (setq calculator-mode-map map))) |
| 581 | ||
| cbb2dddb | 582 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
583 | ;;; Startup and mode stuff |
| 584 | ||
| d240a249 | 585 | (defun calculator-mode () |
| 25c269ef DL |
586 | ;; this help is also used as the major help screen |
| 587 | "A [not so] simple calculator for Emacs. | |
| d240a249 GM |
588 | |
| 589 | This calculator is used in the same way as other popular calculators | |
| 590 | like xcalc or calc.exe - but using an Emacs interface. | |
| 591 | ||
| 592 | Expressions are entered using normal infix notation, parens are used as | |
| 593 | normal. Unary functions are usually postfix, but some depends on the | |
| 594 | value of `calculator-unary-style' (if the style for an operator below is | |
| 595 | specified, then it is fixed, otherwise it depends on this variable). | |
| 596 | `+' and `-' can be used as either binary operators or prefix unary | |
| 597 | operators. Numbers can be entered with exponential notation using `e', | |
| 598 | except when using a non-decimal radix mode for input (in this case `e' | |
| 599 | will be the hexadecimal digit). | |
| 600 | ||
| 601 | Here are the editing keys: | |
| 602 | * `RET' `=' evaluate the current expression | |
| 603 | * `C-insert' copy the whole current expression to the `kill-ring' | |
| 86f1e1ec | 604 | * `C-return' evaluate, save result the `kill-ring' and exit |
| d240a249 GM |
605 | * `insert' paste a number if the one was copied (normally) |
| 606 | * `delete' `C-d' clear last argument or whole expression (hit twice) | |
| 607 | * `backspace' delete a digit or a previous expression element | |
| 608 | * `h' `?' pop-up a quick reference help | |
| 609 | * `ESC' `q' exit (`ESC' can be used if `calculator-bind-escape' is | |
| 610 | non-nil, otherwise use three consecutive `ESC's) | |
| 611 | ||
| 612 | These operators are pre-defined: | |
| 613 | * `+' `-' `*' `/' the common binary operators | |
| 614 | * `\\' `%' integer division and reminder | |
| 615 | * `_' `;' postfix unary negation and reciprocal | |
| 616 | * `^' `L' binary operators for x^y and log(x) in base y | |
| 617 | * `Q' `!' unary square root and factorial | |
| 618 | * `S' `C' `T' unary trigonometric operators - sin, cos and tan | |
| 619 | * `|' `#' `&' `~' bitwise operators - or, xor, and, not | |
| 620 | ||
| 621 | The trigonometric functions can be inverted if prefixed with an `I', see | |
| 622 | below for the way to use degrees instead of the default radians. | |
| 623 | ||
| 624 | Two special postfix unary operators are `>' and `<': whenever a binary | |
| 625 | operator is performed, it is remembered along with its arguments; then | |
| 626 | `>' (`<') will apply the same operator with the same right (left) | |
| 627 | argument. | |
| 628 | ||
| 629 | hex/oct/bin modes can be set for input and for display separately. | |
| 630 | Another toggle-able mode is for using degrees instead of radians for | |
| 631 | trigonometric functions. | |
| 632 | The keys to switch modes are (`X' is shortcut for `H'): | |
| 633 | * `D' switch to all-decimal mode, or toggle degrees/radians | |
| 634 | * `B' `O' `H' `X' binary/octal/hexadecimal modes for input & display | |
| 635 | * `i' `o' followed by one of `D' `B' `O' `H' `X' (case | |
| 636 | insensitive) sets only the input or display radix mode | |
| 637 | The prompt indicates the current modes: | |
| 638 | * \"D=\": degrees mode; | |
| 639 | * \"?=\": (? is B/O/H) this is the radix for both input and output; | |
| 640 | * \"=?\": (? is B/O/H) the display radix (when input is decimal); | |
| 641 | * \"??\": (? is D/B/O/H) 1st char for input radix, 2nd for display. | |
| 642 | ||
| 761d3eb3 RS |
643 | Also, the quote key can be used to switch display modes for decimal |
| 644 | numbers (double-quote rotates back), and the two brace characters | |
| 645 | \(\"{\" and \"}\" change display parameters that these displayers use (if | |
| 646 | they handle such). If output is using any radix mode, then these keys | |
| 647 | toggle digit grouping mode and the chunk size. | |
| 25c269ef | 648 | |
| d240a249 GM |
649 | Values can be saved for future reference in either a list of saved |
| 650 | values, or in registers. | |
| 651 | ||
| 652 | The list of saved values is useful for statistics operations on some | |
| 653 | collected data. It is possible to navigate in this list, and if the | |
| 654 | value shown is the current one on the list, an indication is displayed | |
| 655 | as \"[N]\" if this is the last number and there are N numbers, or | |
| 656 | \"[M/N]\" if the M-th value is shown. | |
| 657 | * `SPC' evaluate the current value as usual, but also adds | |
| 658 | the result to the list of saved values | |
| 659 | * `l' `v' computes total / average of saved values | |
| 660 | * `up' `C-p' browse to the previous value in the list | |
| 661 | * `down' `C-n' browse to the next value in the list | |
| 662 | * `delete' `C-d' remove current value from the list (if it is on it) | |
| 663 | * `C-delete' `C-c' delete the whole list | |
| 664 | ||
| 665 | Registers are variable-like place-holders for values: | |
| 666 | * `s' followed by a character attach the current value to that character | |
| 667 | * `g' followed by a character fetches the attached value | |
| 668 | ||
| 669 | There are many variables that can be used to customize the calculator. | |
| 670 | Some interesting customization variables are: | |
| 671 | * `calculator-electric-mode' use only the echo-area electrically. | |
| 672 | * `calculator-unary-style' set most unary ops to pre/postfix style. | |
| 673 | * `calculator-user-registers' to define user-preset registers. | |
| 674 | * `calculator-user-operators' to add user-defined operators. | |
| 675 | See the documentation for these variables, and \"calculator.el\" for | |
| 676 | more information. | |
| 677 | ||
| 678 | \\{calculator-mode-map}" | |
| 679 | (interactive) | |
| 680 | (kill-all-local-variables) | |
| 681 | (setq major-mode 'calculator-mode) | |
| 682 | (setq mode-name "Calculator") | |
| 683 | (use-local-map calculator-mode-map) | |
| 262f8352 | 684 | (run-mode-hooks 'calculator-mode-hook)) |
| d240a249 | 685 | |
| 25c269ef DL |
686 | (eval-when-compile (require 'electric) (require 'ehelp)) |
| 687 | ||
| d240a249 GM |
688 | ;;;###autoload |
| 689 | (defun calculator () | |
| 25c269ef | 690 | "Run the Emacs calculator. |
| d240a249 GM |
691 | See the documentation for `calculator-mode' for more information." |
| 692 | (interactive) | |
| 86f1e1ec GM |
693 | (if calculator-restart-other-mode |
| 694 | (setq calculator-electric-mode (not calculator-electric-mode))) | |
| d240a249 GM |
695 | (if calculator-initial-operators |
| 696 | (progn (calculator-add-operators calculator-initial-operators) | |
| 697 | (setq calculator-initial-operators nil) | |
| 698 | ;; don't change this since it is a customization variable, | |
| 25c269ef | 699 | ;; its set function will add any new operators |
| d240a249 | 700 | (calculator-add-operators calculator-user-operators))) |
| cc234da9 | 701 | (setq calculator-buffer (get-buffer-create "*calculator*")) |
| d240a249 GM |
702 | (if calculator-electric-mode |
| 703 | (save-window-excursion | |
| 86f1e1ec | 704 | (progn (require 'electric) (message nil)) ; hide load message |
| d240a249 GM |
705 | (let (old-g-map old-l-map (echo-keystrokes 0) |
| 706 | (garbage-collection-messages nil)) ; no gc msg when electric | |
| cc234da9 | 707 | (set-window-buffer (minibuffer-window) calculator-buffer) |
| d240a249 GM |
708 | (select-window (minibuffer-window)) |
| 709 | (calculator-reset) | |
| 710 | (calculator-update-display) | |
| 711 | (setq old-l-map (current-local-map)) | |
| 712 | (setq old-g-map (current-global-map)) | |
| 713 | (setq calculator-saved-global-map (current-global-map)) | |
| 86f1e1ec | 714 | (use-local-map nil) |
| d240a249 | 715 | (use-global-map calculator-mode-map) |
| 761d3eb3 | 716 | (run-hooks 'calculator-mode-hook) |
| d240a249 GM |
717 | (unwind-protect |
| 718 | (catch 'calculator-done | |
| 719 | (Electric-command-loop | |
| 720 | 'calculator-done | |
| 721 | ;; can't use 'noprompt, bug in electric.el | |
| 722 | '(lambda () 'noprompt) | |
| 723 | nil | |
| 86f1e1ec | 724 | (lambda (x y) (calculator-update-display)))) |
| d240a249 GM |
725 | (and calculator-buffer |
| 726 | (catch 'calculator-done (calculator-quit))) | |
| 727 | (use-local-map old-l-map) | |
| 728 | (use-global-map old-g-map)))) | |
| 86f1e1ec | 729 | (progn |
| 4351784f GM |
730 | (cond |
| 731 | ((not (get-buffer-window calculator-buffer)) | |
| 732 | (let ((split-window-keep-point nil) | |
| 733 | (window-min-height 2)) | |
| 734 | ;; maybe leave two lines for our window because of the normal | |
| 735 | ;; `raised' modeline in Emacs 21 | |
| 736 | (select-window | |
| 737 | (split-window-vertically | |
| 738 | (if (and (fboundp 'face-attr-construct) | |
| 739 | (plist-get (face-attr-construct 'modeline) :box)) | |
| 740 | -3 -2))) | |
| 741 | (switch-to-buffer calculator-buffer))) | |
| 742 | ((not (eq (current-buffer) calculator-buffer)) | |
| 743 | (select-window (get-buffer-window calculator-buffer)))) | |
| 86f1e1ec GM |
744 | (calculator-mode) |
| 745 | (setq buffer-read-only t) | |
| 746 | (calculator-reset) | |
| 747 | (message "Hit `?' For a quick help screen."))) | |
| 748 | (if (and calculator-restart-other-mode calculator-electric-mode) | |
| 749 | (calculator))) | |
| d240a249 | 750 | |
| 761d3eb3 RS |
751 | (defun calculator-message (string &rest arguments) |
| 752 | "Same as `message', but special handle of electric mode." | |
| 753 | (apply 'message string arguments) | |
| 754 | (if calculator-electric-mode | |
| 755 | (progn (sit-for 1) (message nil)))) | |
| 756 | ||
| cbb2dddb | 757 | ;;;--------------------------------------------------------------------- |
| 2188f2d4 | 758 | ;;; Operators |
| 25c269ef | 759 | |
| d240a249 GM |
760 | (defun calculator-op-arity (op) |
| 761 | "Return OP's arity, 2, +1 or -1." | |
| 762 | (let ((arity (or (nth 3 op) 'x))) | |
| 763 | (if (numberp arity) | |
| 764 | arity | |
| 765 | (if (eq calculator-unary-style 'postfix) +1 -1)))) | |
| 766 | ||
| 767 | (defun calculator-op-prec (op) | |
| 768 | "Return OP's precedence for reducing when inserting into the stack. | |
| 769 | Defaults to 1." | |
| 770 | (or (nth 4 op) 1)) | |
| 771 | ||
| 772 | (defun calculator-add-operators (more-ops) | |
| 773 | "This function handles operator addition. | |
| 774 | Adds MORE-OPS to `calculator-operator', called initially to handle | |
| 775 | `calculator-initial-operators' and `calculator-user-operators'." | |
| 776 | (let ((added-ops nil)) | |
| 777 | (while more-ops | |
| 778 | (or (eq (car (car more-ops)) 'nobind) | |
| 779 | (let ((i -1) (key (car (car more-ops)))) | |
| 780 | ;; make sure the key is undefined, so it's easy to define | |
| 781 | ;; prefix keys | |
| 782 | (while (< (setq i (1+ i)) (length key)) | |
| 783 | (or (keymapp | |
| 784 | (lookup-key calculator-mode-map | |
| 785 | (substring key 0 (1+ i)))) | |
| 786 | (progn | |
| 787 | (define-key | |
| 788 | calculator-mode-map (substring key 0 (1+ i)) nil) | |
| 789 | (setq i (length key))))) | |
| 790 | (define-key calculator-mode-map key 'calculator-op))) | |
| 791 | (setq added-ops (cons (if (eq (car (car more-ops)) 'nobind) | |
| 792 | (cdr (car more-ops)) | |
| 793 | (car more-ops)) | |
| 794 | added-ops)) | |
| 795 | (setq more-ops (cdr more-ops))) | |
| 796 | ;; added-ops come first, but in correct order | |
| 797 | (setq calculator-operators | |
| 798 | (append (nreverse added-ops) calculator-operators)))) | |
| 799 | ||
| cbb2dddb | 800 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
801 | ;;; Display stuff |
| 802 | ||
| d240a249 GM |
803 | (defun calculator-reset () |
| 804 | "Reset calculator variables." | |
| 86f1e1ec GM |
805 | (or calculator-restart-other-mode |
| 806 | (setq calculator-stack nil | |
| 807 | calculator-curnum nil | |
| 808 | calculator-stack-display nil | |
| 809 | calculator-display-fragile nil)) | |
| 810 | (setq calculator-restart-other-mode nil) | |
| d240a249 GM |
811 | (calculator-update-display)) |
| 812 | ||
| 813 | (defun calculator-get-prompt () | |
| 814 | "Return a string to display. | |
| 815 | The string is set not to exceed the screen width." | |
| 816 | (let* ((calculator-prompt | |
| 817 | (format calculator-prompt | |
| 818 | (cond | |
| 819 | ((or calculator-output-radix calculator-input-radix) | |
| 820 | (if (eq calculator-output-radix | |
| 821 | calculator-input-radix) | |
| 822 | (concat | |
| 823 | (char-to-string | |
| 824 | (car (rassq calculator-output-radix | |
| 825 | calculator-char-radix))) | |
| 826 | "=") | |
| 827 | (concat | |
| 828 | (if calculator-input-radix | |
| 829 | (char-to-string | |
| 830 | (car (rassq calculator-input-radix | |
| 831 | calculator-char-radix))) | |
| 832 | "=") | |
| 833 | (char-to-string | |
| 834 | (car (rassq calculator-output-radix | |
| 835 | calculator-char-radix)))))) | |
| 836 | (calculator-deg "D=") | |
| 837 | (t "==")))) | |
| 838 | (prompt | |
| 839 | (concat calculator-prompt | |
| 840 | (cdr calculator-stack-display) | |
| 841 | (cond (calculator-curnum | |
| 842 | ;; number being typed | |
| 843 | (concat calculator-curnum "_")) | |
| 844 | ((and (= 1 (length calculator-stack)) | |
| 845 | calculator-display-fragile) | |
| 846 | ;; only the result is shown, next number will | |
| 847 | ;; restart | |
| 848 | nil) | |
| 849 | (t | |
| 850 | ;; waiting for a number or an operator | |
| 851 | "?")))) | |
| 852 | (trim (- (length prompt) (1- (window-width))))) | |
| 853 | (if (<= trim 0) | |
| 854 | prompt | |
| 855 | (concat calculator-prompt | |
| 856 | (substring prompt (+ trim (length calculator-prompt))))))) | |
| 857 | ||
| 761d3eb3 RS |
858 | (defun calculator-string-to-number (str) |
| 859 | "Convert the given STR to a number, according to the value of | |
| 860 | `calculator-input-radix'." | |
| d240a249 GM |
861 | (if calculator-input-radix |
| 862 | (let ((radix | |
| 863 | (cdr (assq calculator-input-radix | |
| 864 | '((bin . 2) (oct . 8) (hex . 16))))) | |
| 761d3eb3 RS |
865 | (i -1) (value 0) (new-value 0)) |
| 866 | ;; assume mostly valid input (e.g., characters in range) | |
| 867 | (while (< (setq i (1+ i)) (length str)) | |
| 868 | (setq new-value | |
| 869 | (let* ((ch (upcase (aref str i))) | |
| 870 | (n (cond ((< ch ?0) nil) | |
| 871 | ((<= ch ?9) (- ch ?0)) | |
| 872 | ((< ch ?A) nil) | |
| 873 | ((<= ch ?Z) (- ch (- ?A 10))) | |
| 874 | (t nil)))) | |
| 875 | (if (and n (<= 0 n) (< n radix)) | |
| 876 | (+ n (* radix value)) | |
| 877 | (progn | |
| 878 | (calculator-message | |
| 879 | "Warning: Ignoring bad input character `%c'." ch) | |
| 880 | (sit-for 1) | |
| 881 | value)))) | |
| 882 | (if (if (< new-value 0) (> value 0) (< value 0)) | |
| 883 | (calculator-message "Warning: Overflow in input.")) | |
| 884 | (setq value new-value)) | |
| d240a249 | 885 | value) |
| 761d3eb3 RS |
886 | (car (read-from-string |
| 887 | (cond ((equal "." str) "0.0") | |
| 888 | ((string-match "[eE][+-]?$" str) (concat str "0")) | |
| 889 | ((string-match "\\.[0-9]\\|[eE]" str) str) | |
| 890 | ((string-match "\\." str) | |
| 891 | ;; do this because Emacs reads "23." as an integer | |
| 892 | (concat str "0")) | |
| 893 | ((stringp str) (concat str ".0")) | |
| 894 | (t "0.0")))))) | |
| 895 | ||
| 896 | (defun calculator-curnum-value () | |
| 897 | "Get the numeric value of the displayed number string as a float." | |
| 898 | (calculator-string-to-number calculator-curnum)) | |
| d240a249 | 899 | |
| 25c269ef DL |
900 | (defun calculator-rotate-displayer (&optional new-disp) |
| 901 | "Switch to the next displayer on the `calculator-displayers' list. | |
| 902 | Can be called with an optional argument NEW-DISP to force rotation to | |
| 761d3eb3 RS |
903 | that argument. |
| 904 | If radix output mode is active, toggle digit grouping." | |
| 25c269ef | 905 | (interactive) |
| 761d3eb3 RS |
906 | (cond |
| 907 | (calculator-output-radix | |
| 908 | (setq calculator-radix-grouping-mode | |
| 909 | (not calculator-radix-grouping-mode)) | |
| 910 | (calculator-message | |
| 911 | "Digit grouping mode %s." | |
| 912 | (if calculator-radix-grouping-mode "ON" "OFF"))) | |
| 913 | (t | |
| 914 | (setq calculator-displayers | |
| 915 | (if (and new-disp (memq new-disp calculator-displayers)) | |
| 916 | (let ((tmp nil)) | |
| 917 | (while (not (eq (car calculator-displayers) new-disp)) | |
| 918 | (setq tmp (cons (car calculator-displayers) tmp)) | |
| 919 | (setq calculator-displayers | |
| 920 | (cdr calculator-displayers))) | |
| 921 | (setq calculator-displayers | |
| 922 | (nconc calculator-displayers (nreverse tmp)))) | |
| 923 | (nconc (cdr calculator-displayers) | |
| 924 | (list (car calculator-displayers))))) | |
| 925 | (calculator-message | |
| 926 | "Using %s." (cadr (car calculator-displayers))))) | |
| 25c269ef DL |
927 | (calculator-enter)) |
| 928 | ||
| 929 | (defun calculator-rotate-displayer-back () | |
| 761d3eb3 RS |
930 | "Like `calculator-rotate-displayer', but rotates modes back. |
| 931 | If radix output mode is active, toggle digit grouping." | |
| 25c269ef DL |
932 | (interactive) |
| 933 | (calculator-rotate-displayer (car (last calculator-displayers)))) | |
| 934 | ||
| 4351784f | 935 | (defun calculator-displayer-prev () |
| 25c269ef DL |
936 | "Send the current displayer function a 'left argument. |
| 937 | This is used to modify display arguments (if the current displayer | |
| 761d3eb3 RS |
938 | function supports this). |
| 939 | If radix output mode is active, increase the grouping size." | |
| 25c269ef | 940 | (interactive) |
| 761d3eb3 RS |
941 | (if calculator-output-radix |
| 942 | (progn (setq calculator-radix-grouping-digits | |
| 943 | (1+ calculator-radix-grouping-digits)) | |
| 944 | (calculator-enter)) | |
| 945 | (and (car calculator-displayers) | |
| 946 | (let ((disp (caar calculator-displayers))) | |
| 947 | (cond | |
| 948 | ((symbolp disp) (funcall disp 'left)) | |
| 949 | ((and (consp disp) (eq 'std (car disp))) | |
| 950 | (calculator-standard-displayer 'left (cadr disp)))))))) | |
| 25c269ef | 951 | |
| 4351784f | 952 | (defun calculator-displayer-next () |
| 25c269ef DL |
953 | "Send the current displayer function a 'right argument. |
| 954 | This is used to modify display arguments (if the current displayer | |
| 761d3eb3 RS |
955 | function supports this). |
| 956 | If radix output mode is active, decrease the grouping size." | |
| 25c269ef | 957 | (interactive) |
| 761d3eb3 RS |
958 | (if calculator-output-radix |
| 959 | (progn (setq calculator-radix-grouping-digits | |
| 960 | (max 2 (1- calculator-radix-grouping-digits))) | |
| 961 | (calculator-enter)) | |
| 962 | (and (car calculator-displayers) | |
| 963 | (let ((disp (caar calculator-displayers))) | |
| 964 | (cond | |
| 965 | ((symbolp disp) (funcall disp 'right)) | |
| 966 | ((and (consp disp) (eq 'std (car disp))) | |
| 967 | (calculator-standard-displayer 'right (cadr disp)))))))) | |
| 25c269ef DL |
968 | |
| 969 | (defun calculator-remove-zeros (numstr) | |
| 970 | "Get a number string NUMSTR and remove unnecessary zeroes. | |
| 971 | the behavior of this function is controlled by | |
| 972 | `calculator-remove-zeros'." | |
| 973 | (cond ((and (eq calculator-remove-zeros t) | |
| 974 | (string-match "\\.0+\\([eE][+-]?[0-9]*\\)?$" numstr)) | |
| 975 | ;; remove all redundant zeros leaving an integer | |
| 976 | (if (match-beginning 1) | |
| 977 | (concat (substring numstr 0 (match-beginning 0)) | |
| 978 | (match-string 1 numstr)) | |
| 979 | (substring numstr 0 (match-beginning 0)))) | |
| 980 | ((and calculator-remove-zeros | |
| 981 | (string-match | |
| 982 | "\\..\\([0-9]*[1-9]\\)?\\(0+\\)\\([eE][+-]?[0-9]*\\)?$" | |
| 983 | numstr)) | |
| 984 | ;; remove zeros, except for first after the "." | |
| 985 | (if (match-beginning 3) | |
| 986 | (concat (substring numstr 0 (match-beginning 2)) | |
| 987 | (match-string 3 numstr)) | |
| 988 | (substring numstr 0 (match-beginning 2)))) | |
| 989 | (t numstr))) | |
| 990 | ||
| 991 | (defun calculator-standard-displayer (num char) | |
| 992 | "Standard display function, used to display NUM. | |
| 993 | Its behavior is determined by `calculator-number-digits' and the given | |
| 994 | CHAR argument (both will be used to compose a format string). If the | |
| 995 | char is \"n\" then this function will choose one between %f or %e, this | |
| 996 | is a work around %g jumping to exponential notation too fast. | |
| 997 | ||
| 998 | The special 'left and 'right symbols will make it change the current | |
| 999 | number of digits displayed (`calculator-number-digits'). | |
| 1000 | ||
| 1001 | It will also remove redundant zeros from the result." | |
| 1002 | (if (symbolp num) | |
| 1003 | (cond ((eq num 'left) | |
| 1004 | (and (> calculator-number-digits 0) | |
| 1005 | (setq calculator-number-digits | |
| 1006 | (1- calculator-number-digits)) | |
| 1007 | (calculator-enter))) | |
| 1008 | ((eq num 'right) | |
| 1009 | (setq calculator-number-digits | |
| 1010 | (1+ calculator-number-digits)) | |
| 1011 | (calculator-enter))) | |
| 4351784f GM |
1012 | (let ((str (if (zerop num) |
| 1013 | "0" | |
| 1014 | (format | |
| 1015 | (concat "%." | |
| 1016 | (number-to-string calculator-number-digits) | |
| 1017 | (if (eq char ?n) | |
| 1018 | (let ((n (abs num))) | |
| 1019 | (if (or (< n 0.001) (> n 1e8)) "e" "f")) | |
| 1020 | (string char))) | |
| 1021 | num)))) | |
| 25c269ef DL |
1022 | (calculator-remove-zeros str)))) |
| 1023 | ||
| 1024 | (defun calculator-eng-display (num) | |
| 1025 | "Display NUM in engineering notation. | |
| 1026 | The number of decimal digits used is controlled by | |
| 1027 | `calculator-number-digits', so to change it at runtime you have to use | |
| 1028 | the 'left or 'right when one of the standard modes is used." | |
| 1029 | (if (symbolp num) | |
| 1030 | (cond ((eq num 'left) | |
| 1031 | (setq calculator-eng-extra | |
| 1032 | (if calculator-eng-extra | |
| 1033 | (1+ calculator-eng-extra) | |
| 1034 | 1)) | |
| 1035 | (let ((calculator-eng-tmp-show t)) (calculator-enter))) | |
| 1036 | ((eq num 'right) | |
| 1037 | (setq calculator-eng-extra | |
| 1038 | (if calculator-eng-extra | |
| 1039 | (1- calculator-eng-extra) | |
| 1040 | -1)) | |
| 1041 | (let ((calculator-eng-tmp-show t)) (calculator-enter)))) | |
| 1042 | (let ((exp 0)) | |
| 1043 | (and (not (= 0 num)) | |
| 1044 | (progn | |
| 1045 | (while (< (abs num) 1.0) | |
| 1046 | (setq num (* num 1000.0)) (setq exp (- exp 3))) | |
| 1047 | (while (> (abs num) 999.0) | |
| 1048 | (setq num (/ num 1000.0)) (setq exp (+ exp 3))) | |
| 1049 | (and calculator-eng-tmp-show | |
| 1050 | (not (= 0 calculator-eng-extra)) | |
| 1051 | (let ((i calculator-eng-extra)) | |
| 1052 | (while (> i 0) | |
| 1053 | (setq num (* num 1000.0)) (setq exp (- exp 3)) | |
| 1054 | (setq i (1- i))) | |
| 1055 | (while (< i 0) | |
| 1056 | (setq num (/ num 1000.0)) (setq exp (+ exp 3)) | |
| 1057 | (setq i (1+ i))))))) | |
| 1058 | (or calculator-eng-tmp-show (setq calculator-eng-extra nil)) | |
| 6ac080e1 GM |
1059 | (let ((str (format (concat "%." (number-to-string |
| 1060 | calculator-number-digits) | |
| 1061 | "f") | |
| 25c269ef DL |
1062 | num))) |
| 1063 | (concat (let ((calculator-remove-zeros | |
| 1064 | ;; make sure we don't leave integers | |
| 1065 | (and calculator-remove-zeros 'x))) | |
| 1066 | (calculator-remove-zeros str)) | |
| 1067 | "e" (number-to-string exp)))))) | |
| 1068 | ||
| 761d3eb3 | 1069 | (defun calculator-number-to-string (num) |
| d240a249 GM |
1070 | "Convert NUM to a displayable string." |
| 1071 | (cond | |
| 1072 | ((and (numberp num) calculator-output-radix) | |
| 1073 | ;; print with radix - for binary I convert the octal number | |
| 1074 | (let ((str (format (if (eq calculator-output-radix 'hex) "%x" "%o") | |
| 1075 | (calculator-truncate | |
| 1076 | (if calculator-2s-complement num (abs num)))))) | |
| 1077 | (if (eq calculator-output-radix 'bin) | |
| 1078 | (let ((i -1) (s "")) | |
| 1079 | (while (< (setq i (1+ i)) (length str)) | |
| 1080 | (setq s | |
| 1081 | (concat s | |
| 1082 | (cdr (assq (aref str i) | |
| 1083 | '((?0 . "000") (?1 . "001") | |
| 1084 | (?2 . "010") (?3 . "011") | |
| 1085 | (?4 . "100") (?5 . "101") | |
| 1086 | (?6 . "110") (?7 . "111"))))))) | |
| 1087 | (string-match "^0*\\(.+\\)" s) | |
| 1088 | (setq str (match-string 1 s)))) | |
| 761d3eb3 RS |
1089 | (if calculator-radix-grouping-mode |
| 1090 | (let ((d (/ (length str) calculator-radix-grouping-digits)) | |
| 1091 | (r (% (length str) calculator-radix-grouping-digits))) | |
| 1092 | (while (>= (setq d (1- d)) (if (zerop r) 1 0)) | |
| 1093 | (let ((i (+ r (* d calculator-radix-grouping-digits)))) | |
| 1094 | (setq str (concat (substring str 0 i) | |
| 1095 | calculator-radix-grouping-separator | |
| 1096 | (substring str i))))))) | |
| d240a249 GM |
1097 | (upcase |
| 1098 | (if (and (not calculator-2s-complement) (< num 0)) | |
| 1099 | (concat "-" str) | |
| 1100 | str)))) | |
| 4351784f GM |
1101 | ((and (numberp num) calculator-displayer) |
| 1102 | (cond | |
| 1103 | ((stringp calculator-displayer) | |
| 1104 | (format calculator-displayer num)) | |
| 1105 | ((symbolp calculator-displayer) | |
| 1106 | (funcall calculator-displayer num)) | |
| 1107 | ((and (consp calculator-displayer) | |
| 1108 | (eq 'std (car calculator-displayer))) | |
| 1109 | (calculator-standard-displayer num (cadr calculator-displayer))) | |
| 1110 | ((listp calculator-displayer) | |
| 1111 | (eval calculator-displayer)) | |
| 1112 | (t (prin1-to-string num t)))) | |
| 25c269ef | 1113 | ;; operators are printed here |
| d240a249 GM |
1114 | (t (prin1-to-string (nth 1 num) t)))) |
| 1115 | ||
| 1116 | (defun calculator-update-display (&optional force) | |
| 1117 | "Update the display. | |
| 1118 | If optional argument FORCE is non-nil, don't use the cached string." | |
| 1119 | (set-buffer calculator-buffer) | |
| 1120 | ;; update calculator-stack-display | |
| 1121 | (if (or force | |
| 1122 | (not (eq (car calculator-stack-display) calculator-stack))) | |
| 1123 | (setq calculator-stack-display | |
| 1124 | (cons calculator-stack | |
| 1125 | (if calculator-stack | |
| 1126 | (concat | |
| 4351784f GM |
1127 | (let ((calculator-displayer |
| 1128 | (if (and calculator-displayers | |
| 1129 | (= 1 (length calculator-stack))) | |
| 1130 | ;; customizable display for a single value | |
| 1131 | (caar calculator-displayers) | |
| 1132 | calculator-displayer))) | |
| 761d3eb3 | 1133 | (mapconcat 'calculator-number-to-string |
| 4351784f GM |
1134 | (reverse calculator-stack) |
| 1135 | " ")) | |
| d240a249 GM |
1136 | " " |
| 1137 | (and calculator-display-fragile | |
| 1138 | calculator-saved-list | |
| 1139 | (= (car calculator-stack) | |
| 1140 | (nth calculator-saved-ptr | |
| 1141 | calculator-saved-list)) | |
| 1142 | (if (= 0 calculator-saved-ptr) | |
| 1143 | (format "[%s]" (length calculator-saved-list)) | |
| 1144 | (format "[%s/%s]" | |
| 1145 | (- (length calculator-saved-list) | |
| 1146 | calculator-saved-ptr) | |
| 1147 | (length calculator-saved-list))))) | |
| 1148 | "")))) | |
| 1149 | (let ((inhibit-read-only t)) | |
| 1150 | (erase-buffer) | |
| 1151 | (insert (calculator-get-prompt))) | |
| 1152 | (set-buffer-modified-p nil) | |
| 1153 | (if calculator-display-fragile | |
| 1154 | (goto-char (1+ (length calculator-prompt))) | |
| 1155 | (goto-char (1- (point))))) | |
| 1156 | ||
| cbb2dddb | 1157 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1158 | ;;; Stack computations |
| 1159 | ||
| d240a249 GM |
1160 | (defun calculator-reduce-stack (prec) |
| 1161 | "Reduce the stack using top operator. | |
| 1162 | PREC is a precedence - reduce everything with higher precedence." | |
| 1163 | (while | |
| 1164 | (cond | |
| 1165 | ((and (cdr (cdr calculator-stack)) ; have three values | |
| 1166 | (consp (nth 0 calculator-stack)) ; two operators & num | |
| 1167 | (numberp (nth 1 calculator-stack)) | |
| 1168 | (consp (nth 2 calculator-stack)) | |
| 1169 | (eq '\) (nth 1 (nth 0 calculator-stack))) | |
| 1170 | (eq '\( (nth 1 (nth 2 calculator-stack)))) | |
| 1171 | ;; reduce "... ( x )" --> "... x" | |
| 1172 | (setq calculator-stack | |
| 1173 | (cons (nth 1 calculator-stack) | |
| 1174 | (nthcdr 3 calculator-stack))) | |
| 1175 | ;; another iteration | |
| 1176 | t) | |
| 1177 | ((and (cdr (cdr calculator-stack)) ; have three values | |
| 1178 | (numberp (nth 0 calculator-stack)) ; two nums & operator | |
| 1179 | (consp (nth 1 calculator-stack)) | |
| 1180 | (numberp (nth 2 calculator-stack)) | |
| 1181 | (= 2 (calculator-op-arity ; binary operator | |
| 1182 | (nth 1 calculator-stack))) | |
| 1183 | (<= prec ; with higher prec. | |
| 1184 | (calculator-op-prec (nth 1 calculator-stack)))) | |
| 1185 | ;; reduce "... x op y" --> "... r", r is the result | |
| 1186 | (setq calculator-stack | |
| 1187 | (cons (calculator-funcall | |
| 1188 | (nth 2 (nth 1 calculator-stack)) | |
| 1189 | (nth 2 calculator-stack) | |
| 1190 | (nth 0 calculator-stack)) | |
| 1191 | (nthcdr 3 calculator-stack))) | |
| 1192 | ;; another iteration | |
| 1193 | t) | |
| 1194 | ((and (>= (length calculator-stack) 2) ; have two values | |
| 1195 | (numberp (nth 0 calculator-stack)) ; number & operator | |
| 1196 | (consp (nth 1 calculator-stack)) | |
| 1197 | (= -1 (calculator-op-arity ; prefix-unary op | |
| 1198 | (nth 1 calculator-stack))) | |
| 1199 | (<= prec ; with higher prec. | |
| 1200 | (calculator-op-prec (nth 1 calculator-stack)))) | |
| 1201 | ;; reduce "... op x" --> "... r" for prefix op | |
| 1202 | (setq calculator-stack | |
| 1203 | (cons (calculator-funcall | |
| 1204 | (nth 2 (nth 1 calculator-stack)) | |
| 1205 | (nth 0 calculator-stack)) | |
| 1206 | (nthcdr 2 calculator-stack))) | |
| 1207 | ;; another iteration | |
| 1208 | t) | |
| 1209 | ((and (cdr calculator-stack) ; have two values | |
| 1210 | (consp (nth 0 calculator-stack)) ; operator & number | |
| 1211 | (numberp (nth 1 calculator-stack)) | |
| 1212 | (= +1 (calculator-op-arity ; postfix-unary op | |
| 1213 | (nth 0 calculator-stack))) | |
| 1214 | (<= prec ; with higher prec. | |
| 1215 | (calculator-op-prec (nth 0 calculator-stack)))) | |
| 1216 | ;; reduce "... x op" --> "... r" for postfix op | |
| 1217 | (setq calculator-stack | |
| 1218 | (cons (calculator-funcall | |
| 1219 | (nth 2 (nth 0 calculator-stack)) | |
| 1220 | (nth 1 calculator-stack)) | |
| 1221 | (nthcdr 2 calculator-stack))) | |
| 1222 | ;; another iteration | |
| 1223 | t) | |
| 1224 | ((and calculator-stack ; have one value | |
| 1225 | (consp (nth 0 calculator-stack)) ; an operator | |
| 1226 | (= 0 (calculator-op-arity ; 0-ary op | |
| 1227 | (nth 0 calculator-stack)))) | |
| 1228 | ;; reduce "... op" --> "... r" for 0-ary op | |
| 1229 | (setq calculator-stack | |
| 1230 | (cons (calculator-funcall | |
| 1231 | (nth 2 (nth 0 calculator-stack))) | |
| 1232 | (nthcdr 1 calculator-stack))) | |
| 1233 | ;; another iteration | |
| 1234 | t) | |
| 1235 | ((and (cdr calculator-stack) ; have two values | |
| 1236 | (numberp (nth 0 calculator-stack)) ; both numbers | |
| 1237 | (numberp (nth 1 calculator-stack))) | |
| 1238 | ;; get rid of redundant numbers: | |
| 1239 | ;; reduce "... y x" --> "... x" | |
| 1240 | ;; needed for 0-ary ops that puts more values | |
| 1241 | (setcdr calculator-stack (cdr (cdr calculator-stack)))) | |
| 1242 | (t ;; no more iterations | |
| 1243 | nil)))) | |
| 1244 | ||
| 25c269ef DL |
1245 | (defun calculator-funcall (f &optional X Y) |
| 1246 | "If F is a symbol, evaluate (F X Y). | |
| 1247 | Otherwise, it should be a list, evaluate it with X, Y bound to the | |
| 1248 | arguments." | |
| 1249 | ;; remember binary ops for calculator-repR/L | |
| 1250 | (if Y (setq calculator-last-opXY (list f X Y))) | |
| 1251 | (condition-case nil | |
| 1252 | ;; there used to be code here that returns 0 if the result was | |
| 1253 | ;; smaller than calculator-epsilon (1e-15). I don't think this is | |
| 1254 | ;; necessary now. | |
| 1255 | (if (symbolp f) | |
| 1256 | (cond ((and X Y) (funcall f X Y)) | |
| 1257 | (X (funcall f X)) | |
| 1258 | (t (funcall f))) | |
| 1259 | ;; f is an expression | |
| 1260 | (let* ((__f__ f) ; so we can get this value below... | |
| 1261 | (TX (calculator-truncate X)) | |
| 1262 | (TY (and Y (calculator-truncate Y))) | |
| 1263 | (DX (if calculator-deg (/ (* X pi) 180) X)) | |
| 1264 | (L calculator-saved-list) | |
| 1265 | (Fbound (fboundp 'F)) | |
| 1266 | (Fsave (and Fbound (symbol-function 'F))) | |
| 1267 | (Dbound (fboundp 'D)) | |
| 1268 | (Dsave (and Dbound (symbol-function 'D)))) | |
| 1269 | ;; a shortened version of flet | |
| 1270 | (fset 'F (function | |
| 1271 | (lambda (&optional x y) | |
| 1272 | (calculator-funcall __f__ x y)))) | |
| 1273 | (fset 'D (function | |
| 1274 | (lambda (x) | |
| 1275 | (if calculator-deg (/ (* x 180) pi) x)))) | |
| 1276 | (unwind-protect (eval f) | |
| 1277 | (if Fbound (fset 'F Fsave) (fmakunbound 'F)) | |
| 1278 | (if Dbound (fset 'D Dsave) (fmakunbound 'D))))) | |
| 1279 | (error 0))) | |
| 1280 | ||
| cbb2dddb | 1281 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1282 | ;;; Input interaction |
| 1283 | ||
| 86f1e1ec GM |
1284 | (defun calculator-last-input (&optional keys) |
| 1285 | "Last char (or event or event sequence) that was read. | |
| 1286 | Optional string argument KEYS will force using it as the keys entered." | |
| 1287 | (let ((inp (or keys (this-command-keys)))) | |
| d240a249 GM |
1288 | (if (or (stringp inp) (not (arrayp inp))) |
| 1289 | inp | |
| 1290 | ;; this translates kp-x to x and [tries to] create a string to | |
| 1291 | ;; lookup operators | |
| 1292 | (let* ((i -1) (converted-str (make-string (length inp) ? )) k) | |
| 1293 | ;; converts an array to a string the ops lookup with keypad | |
| 1294 | ;; input | |
| 1295 | (while (< (setq i (1+ i)) (length inp)) | |
| 1296 | (setq k (aref inp i)) | |
| 1297 | ;; if Emacs will someday have a event-key, then this would | |
| 1298 | ;; probably be modified anyway | |
| d88757d6 RS |
1299 | (and (if (fboundp 'key-press-event-p) (key-press-event-p k)) |
| 1300 | (if (fboundp 'event-key) | |
| 1301 | (and (event-key k) (setq k (event-key k))))) | |
| d240a249 GM |
1302 | ;; assume all symbols are translatable with an ascii-character |
| 1303 | (and (symbolp k) | |
| 1304 | (setq k (or (get k 'ascii-character) ? ))) | |
| 1305 | (aset converted-str i k)) | |
| 1306 | converted-str)))) | |
| 1307 | ||
| 1308 | (defun calculator-clear-fragile (&optional op) | |
| 1309 | "Clear the fragile flag if it was set, then maybe reset all. | |
| 1310 | OP is the operator (if any) that caused this call." | |
| 1311 | (if (and calculator-display-fragile | |
| 1312 | (or (not op) | |
| 1313 | (= -1 (calculator-op-arity op)) | |
| 1314 | (= 0 (calculator-op-arity op)))) | |
| 1315 | ;; reset if last calc finished, and now get a num or prefix or 0-ary | |
| 25c269ef | 1316 | ;; op |
| d240a249 GM |
1317 | (calculator-reset)) |
| 1318 | (setq calculator-display-fragile nil)) | |
| 1319 | ||
| 1320 | (defun calculator-digit () | |
| 1321 | "Enter a single digit." | |
| 1322 | (interactive) | |
| 1323 | (let ((inp (aref (calculator-last-input) 0))) | |
| 1324 | (if (and (or calculator-display-fragile | |
| 1325 | (not (numberp (car calculator-stack)))) | |
| 1326 | (cond | |
| 1327 | ((not calculator-input-radix) (<= inp ?9)) | |
| 1328 | ((eq calculator-input-radix 'bin) (<= inp ?1)) | |
| 1329 | ((eq calculator-input-radix 'oct) (<= inp ?7)) | |
| 1330 | (t t))) | |
| 1331 | ;; enter digit if starting a new computation or have an op on the | |
| 25c269ef | 1332 | ;; stack |
| d240a249 GM |
1333 | (progn |
| 1334 | (calculator-clear-fragile) | |
| 1335 | (let ((digit (upcase (char-to-string inp)))) | |
| 1336 | (if (equal calculator-curnum "0") | |
| 1337 | (setq calculator-curnum nil)) | |
| 1338 | (setq calculator-curnum | |
| 1339 | (concat (or calculator-curnum "") digit))) | |
| 1340 | (calculator-update-display))))) | |
| 1341 | ||
| 1342 | (defun calculator-decimal () | |
| 1343 | "Enter a decimal period." | |
| 1344 | (interactive) | |
| 1345 | (if (and (not calculator-input-radix) | |
| 1346 | (or calculator-display-fragile | |
| 1347 | (not (numberp (car calculator-stack)))) | |
| 1348 | (not (and calculator-curnum | |
| 1349 | (string-match "[.eE]" calculator-curnum)))) | |
| 1350 | ;; enter the period on the same condition as a digit, only if no | |
| 25c269ef | 1351 | ;; period or exponent entered yet |
| d240a249 GM |
1352 | (progn |
| 1353 | (calculator-clear-fragile) | |
| 1354 | (setq calculator-curnum (concat (or calculator-curnum "0") ".")) | |
| 1355 | (calculator-update-display)))) | |
| 1356 | ||
| 1357 | (defun calculator-exp () | |
| 1358 | "Enter an `E' exponent character, or a digit in hex input mode." | |
| 1359 | (interactive) | |
| 1360 | (if calculator-input-radix | |
| 1361 | (calculator-digit) | |
| 1362 | (if (and (or calculator-display-fragile | |
| 1363 | (not (numberp (car calculator-stack)))) | |
| 1364 | (not (and calculator-curnum | |
| 1365 | (string-match "[eE]" calculator-curnum)))) | |
| 25c269ef | 1366 | ;; same condition as above, also no E so far |
| d240a249 GM |
1367 | (progn |
| 1368 | (calculator-clear-fragile) | |
| 1369 | (setq calculator-curnum (concat (or calculator-curnum "1") "e")) | |
| 1370 | (calculator-update-display))))) | |
| 1371 | ||
| 86f1e1ec GM |
1372 | (defun calculator-op (&optional keys) |
| 1373 | "Enter an operator on the stack, doing all necessary reductions. | |
| 1374 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 | 1375 | (interactive) |
| 25c269ef DL |
1376 | (catch 'op-error |
| 1377 | (let* ((last-inp (calculator-last-input keys)) | |
| 1378 | (op (assoc last-inp calculator-operators))) | |
| 1379 | (calculator-clear-fragile op) | |
| 1380 | (if (and calculator-curnum (/= (calculator-op-arity op) 0)) | |
| 1381 | (setq calculator-stack | |
| 1382 | (cons (calculator-curnum-value) calculator-stack))) | |
| 1383 | (setq calculator-curnum nil) | |
| 1384 | (if (and (= 2 (calculator-op-arity op)) | |
| 1385 | (not (and calculator-stack | |
| 1386 | (numberp (nth 0 calculator-stack))))) | |
| 1387 | ;; we have a binary operator but no number - search for a prefix | |
| 1388 | ;; version | |
| 1389 | (let ((rest-ops calculator-operators)) | |
| 1390 | (while (not (equal last-inp (car (car rest-ops)))) | |
| 1391 | (setq rest-ops (cdr rest-ops))) | |
| 1392 | (setq op (assoc last-inp (cdr rest-ops))) | |
| 1393 | (if (not (and op (= -1 (calculator-op-arity op)))) | |
| 1394 | ;;(error "Binary operator without a first operand") | |
| 1395 | (progn | |
| 761d3eb3 RS |
1396 | (calculator-message |
| 1397 | "Binary operator without a first operand") | |
| 25c269ef DL |
1398 | (throw 'op-error nil))))) |
| 1399 | (calculator-reduce-stack | |
| 1400 | (cond ((eq (nth 1 op) '\() 10) | |
| 1401 | ((eq (nth 1 op) '\)) 0) | |
| 1402 | (t (calculator-op-prec op)))) | |
| 1403 | (if (or (and (= -1 (calculator-op-arity op)) | |
| 1404 | (numberp (car calculator-stack))) | |
| 1405 | (and (/= (calculator-op-arity op) -1) | |
| 1406 | (/= (calculator-op-arity op) 0) | |
| 1407 | (not (numberp (car calculator-stack))))) | |
| 1408 | ;;(error "Unterminated expression") | |
| 1409 | (progn | |
| 761d3eb3 | 1410 | (calculator-message "Unterminated expression") |
| 25c269ef DL |
1411 | (throw 'op-error nil))) |
| 1412 | (setq calculator-stack (cons op calculator-stack)) | |
| 1413 | (calculator-reduce-stack (calculator-op-prec op)) | |
| 1414 | (and (= (length calculator-stack) 1) | |
| 1415 | (numberp (nth 0 calculator-stack)) | |
| 1416 | ;; the display is fragile if it contains only one number | |
| 1417 | (setq calculator-display-fragile t) | |
| 1418 | ;; add number to the saved-list | |
| 1419 | calculator-add-saved | |
| 1420 | (if (= 0 calculator-saved-ptr) | |
| 1421 | (setq calculator-saved-list | |
| 1422 | (cons (car calculator-stack) calculator-saved-list)) | |
| 1423 | (let ((p (nthcdr (1- calculator-saved-ptr) | |
| 1424 | calculator-saved-list))) | |
| 1425 | (setcdr p (cons (car calculator-stack) (cdr p)))))) | |
| 1426 | (calculator-update-display)))) | |
| d240a249 GM |
1427 | |
| 1428 | (defun calculator-op-or-exp () | |
| 1429 | "Either enter an operator or a digit. | |
| 25c269ef DL |
1430 | Used with +/- for entering them as digits in numbers like 1e-3 (there is |
| 1431 | no need for negative numbers since these are handled by unary | |
| 1432 | operators)." | |
| d240a249 GM |
1433 | (interactive) |
| 1434 | (if (and (not calculator-display-fragile) | |
| 1435 | calculator-curnum | |
| 1436 | (string-match "[eE]$" calculator-curnum)) | |
| 1437 | (calculator-digit) | |
| 1438 | (calculator-op))) | |
| 1439 | ||
| cbb2dddb | 1440 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1441 | ;;; Input/output modes (not display) |
| 1442 | ||
| d240a249 GM |
1443 | (defun calculator-dec/deg-mode () |
| 1444 | "Set decimal mode for display & input, if decimal, toggle deg mode." | |
| 1445 | (interactive) | |
| 1446 | (if calculator-curnum | |
| 1447 | (setq calculator-stack | |
| 1448 | (cons (calculator-curnum-value) calculator-stack))) | |
| 1449 | (setq calculator-curnum nil) | |
| 1450 | (if (or calculator-input-radix calculator-output-radix) | |
| 1451 | (progn (setq calculator-input-radix nil) | |
| 1452 | (setq calculator-output-radix nil)) | |
| 1453 | ;; already decimal - toggle degrees mode | |
| 1454 | (setq calculator-deg (not calculator-deg))) | |
| 1455 | (calculator-update-display t)) | |
| 1456 | ||
| 86f1e1ec GM |
1457 | (defun calculator-radix-mode (&optional keys) |
| 1458 | "Set input and display radix modes. | |
| 1459 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 | 1460 | (interactive) |
| 86f1e1ec GM |
1461 | (calculator-radix-input-mode keys) |
| 1462 | (calculator-radix-output-mode keys)) | |
| d240a249 | 1463 | |
| 86f1e1ec GM |
1464 | (defun calculator-radix-input-mode (&optional keys) |
| 1465 | "Set input radix modes. | |
| 1466 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 GM |
1467 | (interactive) |
| 1468 | (if calculator-curnum | |
| 1469 | (setq calculator-stack | |
| 1470 | (cons (calculator-curnum-value) calculator-stack))) | |
| 1471 | (setq calculator-curnum nil) | |
| 1472 | (setq calculator-input-radix | |
| 86f1e1ec | 1473 | (let ((inp (calculator-last-input keys))) |
| d240a249 GM |
1474 | (cdr (assq (upcase (aref inp (1- (length inp)))) |
| 1475 | calculator-char-radix)))) | |
| 1476 | (calculator-update-display)) | |
| 1477 | ||
| 86f1e1ec GM |
1478 | (defun calculator-radix-output-mode (&optional keys) |
| 1479 | "Set display radix modes. | |
| 1480 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 GM |
1481 | (interactive) |
| 1482 | (if calculator-curnum | |
| 1483 | (setq calculator-stack | |
| 1484 | (cons (calculator-curnum-value) calculator-stack))) | |
| 1485 | (setq calculator-curnum nil) | |
| 1486 | (setq calculator-output-radix | |
| 86f1e1ec | 1487 | (let ((inp (calculator-last-input keys))) |
| d240a249 GM |
1488 | (cdr (assq (upcase (aref inp (1- (length inp)))) |
| 1489 | calculator-char-radix)))) | |
| 1490 | (calculator-update-display t)) | |
| 1491 | ||
| cbb2dddb | 1492 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1493 | ;;; Saved values list |
| 1494 | ||
| d240a249 GM |
1495 | (defun calculator-save-on-list () |
| 1496 | "Evaluate current expression, put result on the saved values list." | |
| 1497 | (interactive) | |
| 1498 | (let ((calculator-add-saved t)) ; marks the result to be added | |
| 1499 | (calculator-enter))) | |
| 1500 | ||
| 1501 | (defun calculator-clear-saved () | |
| 1502 | "Clear the list of saved values in `calculator-saved-list'." | |
| 1503 | (interactive) | |
| 1504 | (setq calculator-saved-list nil) | |
| 25c269ef | 1505 | (setq calculator-saved-ptr 0) |
| d240a249 GM |
1506 | (calculator-update-display t)) |
| 1507 | ||
| 1508 | (defun calculator-saved-move (n) | |
| 1509 | "Go N elements up the list of saved values." | |
| 1510 | (interactive) | |
| 1511 | (and calculator-saved-list | |
| 1512 | (or (null calculator-stack) calculator-display-fragile) | |
| 1513 | (progn | |
| 1514 | (setq calculator-saved-ptr | |
| 1515 | (max (min (+ n calculator-saved-ptr) | |
| 1516 | (length calculator-saved-list)) | |
| 1517 | 0)) | |
| 1518 | (if (nth calculator-saved-ptr calculator-saved-list) | |
| 1519 | (setq calculator-stack | |
| 1520 | (list (nth calculator-saved-ptr calculator-saved-list)) | |
| 1521 | calculator-display-fragile t) | |
| 86f1e1ec GM |
1522 | (calculator-reset)) |
| 1523 | (calculator-update-display)))) | |
| d240a249 GM |
1524 | |
| 1525 | (defun calculator-saved-up () | |
| 1526 | "Go up the list of saved values." | |
| 1527 | (interactive) | |
| 1528 | (calculator-saved-move +1)) | |
| 1529 | ||
| 1530 | (defun calculator-saved-down () | |
| 1531 | "Go down the list of saved values." | |
| 1532 | (interactive) | |
| 1533 | (calculator-saved-move -1)) | |
| 1534 | ||
| cbb2dddb | 1535 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1536 | ;;; Misc functions |
| 1537 | ||
| d240a249 GM |
1538 | (defun calculator-open-paren () |
| 1539 | "Equivalents of `(' use this." | |
| 1540 | (interactive) | |
| 86f1e1ec | 1541 | (calculator-op "(")) |
| d240a249 GM |
1542 | |
| 1543 | (defun calculator-close-paren () | |
| 1544 | "Equivalents of `)' use this." | |
| 1545 | (interactive) | |
| 86f1e1ec | 1546 | (calculator-op ")")) |
| d240a249 GM |
1547 | |
| 1548 | (defun calculator-enter () | |
| 86f1e1ec | 1549 | "Evaluate current expression." |
| d240a249 | 1550 | (interactive) |
| 86f1e1ec | 1551 | (calculator-op "=")) |
| d240a249 GM |
1552 | |
| 1553 | (defun calculator-backspace () | |
| 1554 | "Backward delete a single digit or a stack element." | |
| 1555 | (interactive) | |
| 1556 | (if calculator-curnum | |
| 1557 | (setq calculator-curnum | |
| 1558 | (if (> (length calculator-curnum) 1) | |
| 1559 | (substring calculator-curnum | |
| 1560 | 0 (1- (length calculator-curnum))) | |
| 1561 | nil)) | |
| 1562 | (setq calculator-stack (cdr calculator-stack))) | |
| 1563 | (calculator-update-display)) | |
| 1564 | ||
| 1565 | (defun calculator-clear () | |
| 1566 | "Clear current number." | |
| 1567 | (interactive) | |
| 1568 | (setq calculator-curnum nil) | |
| 1569 | (cond | |
| 1570 | ;; if the current number is from the saved-list - remove it | |
| 1571 | ((and calculator-display-fragile | |
| 1572 | calculator-saved-list | |
| 1573 | (= (car calculator-stack) | |
| 1574 | (nth calculator-saved-ptr calculator-saved-list))) | |
| 1575 | (if (= 0 calculator-saved-ptr) | |
| 1576 | (setq calculator-saved-list (cdr calculator-saved-list)) | |
| 1577 | (let ((p (nthcdr (1- calculator-saved-ptr) | |
| 1578 | calculator-saved-list))) | |
| 1579 | (setcdr p (cdr (cdr p))) | |
| 1580 | (setq calculator-saved-ptr (1- calculator-saved-ptr)))) | |
| 1581 | (if calculator-saved-list | |
| 1582 | (setq calculator-stack | |
| 1583 | (list (nth calculator-saved-ptr calculator-saved-list))) | |
| 1584 | (calculator-reset))) | |
| 1585 | ;; reset if fragile or double clear | |
| 1586 | ((or calculator-display-fragile (eq last-command this-command)) | |
| 1587 | (calculator-reset))) | |
| 1588 | (calculator-update-display)) | |
| 1589 | ||
| 1590 | (defun calculator-copy () | |
| 1591 | "Copy current number to the `kill-ring'." | |
| 1592 | (interactive) | |
| 4351784f GM |
1593 | (let ((calculator-displayer |
| 1594 | (or calculator-copy-displayer calculator-displayer)) | |
| 1595 | (calculator-displayers | |
| 1596 | (if calculator-copy-displayer nil calculator-displayers))) | |
| 1597 | (calculator-enter) | |
| 1214bb6e | 1598 | ;; remove trailing spaces and an index |
| 4351784f GM |
1599 | (let ((s (cdr calculator-stack-display))) |
| 1600 | (and s | |
| 1601 | (if (string-match "^\\([^ ]+\\) *\\(\\[[0-9/]+\\]\\)? *$" s) | |
| 1602 | (setq s (match-string 1 s))) | |
| 1603 | (kill-new s))))) | |
| d240a249 GM |
1604 | |
| 1605 | (defun calculator-set-register (reg) | |
| 1606 | "Set a register value for REG." | |
| 1607 | (interactive "cRegister to store into: ") | |
| 1608 | (let* ((as (assq reg calculator-registers)) | |
| 1609 | (val (progn (calculator-enter) (car calculator-stack)))) | |
| 1610 | (if as | |
| 1611 | (setcdr as val) | |
| 1612 | (setq calculator-registers | |
| 1613 | (cons (cons reg val) calculator-registers))) | |
| 761d3eb3 | 1614 | (calculator-message "[%c] := %S" reg val))) |
| d240a249 GM |
1615 | |
| 1616 | (defun calculator-put-value (val) | |
| 1617 | "Paste VAL as if entered. | |
| 1618 | Used by `calculator-paste' and `get-register'." | |
| 1619 | (if (and (numberp val) | |
| 1620 | ;; (not calculator-curnum) | |
| 1621 | (or calculator-display-fragile | |
| 1622 | (not (numberp (car calculator-stack))))) | |
| 1623 | (progn | |
| 1624 | (calculator-clear-fragile) | |
| 4351784f | 1625 | (setq calculator-curnum (let ((calculator-displayer "%S")) |
| 761d3eb3 | 1626 | (calculator-number-to-string val))) |
| d240a249 GM |
1627 | (calculator-update-display)))) |
| 1628 | ||
| 1629 | (defun calculator-paste () | |
| 1630 | "Paste a value from the `kill-ring'." | |
| 1631 | (interactive) | |
| 1632 | (calculator-put-value | |
| 761d3eb3 RS |
1633 | (let ((str (replace-regexp-in-string |
| 1634 | "^ *\\(.+[^ ]\\) *$" "\\1" (current-kill 0)))) | |
| 1635 | (and (not calculator-input-radix) | |
| 1636 | calculator-paste-decimals | |
| cbb2dddb GM |
1637 | (string-match "\\([0-9]+\\)\\(\\.[0-9]+\\)?\\(e[0-9]+\\)?" |
| 1638 | str) | |
| 1639 | (or (match-string 1 str) | |
| 1640 | (match-string 2 str) | |
| 1641 | (match-string 3 str)) | |
| 761d3eb3 | 1642 | (setq str (concat (or (match-string 1 str) "0") |
| cbb2dddb | 1643 | (or (match-string 2 str) ".0") |
| 761d3eb3 RS |
1644 | (or (match-string 3 str) "")))) |
| 1645 | (condition-case nil (calculator-string-to-number str) | |
| 25c269ef | 1646 | (error nil))))) |
| d240a249 GM |
1647 | |
| 1648 | (defun calculator-get-register (reg) | |
| 1649 | "Get a value from a register REG." | |
| 1650 | (interactive "cRegister to get value from: ") | |
| 1651 | (calculator-put-value (cdr (assq reg calculator-registers)))) | |
| 1652 | ||
| 1653 | (defun calculator-help () | |
| 1654 | ;; this is used as the quick reference screen you get with `h' | |
| 1655 | "Quick reference: | |
| 1656 | * numbers/operators/parens/./e - enter expressions | |
| 1657 | + - * / \\(div) %(rem) _(-X,postfix) ;(1/X,postfix) ^(exp) L(og) | |
| 1658 | Q(sqrt) !(fact) S(in) C(os) T(an) |(or) #(xor) &(and) ~(not) | |
| 1659 | * >/< repeats last binary operation with its 2nd (1st) arg as postfix op | |
| 25c269ef DL |
1660 | * I inverses next trig function * '/\"/{} - display/display args |
| 1661 | * D - switch to all-decimal, or toggle deg/rad mode | |
| d240a249 GM |
1662 | * B/O/H/X - binary/octal/hex mode for i/o (X is a shortcut for H) |
| 1663 | * i/o - prefix for d/b/o/x - set only input/output modes | |
| 1664 | * enter/= - evaluate current expr. * s/g - set/get a register | |
| 1665 | * space - evaluate & save on list * l/v - list total/average | |
| 1666 | * up/down/C-p/C-n - browse saved * C-delete - clear all saved | |
| 86f1e1ec | 1667 | * C-insert - copy whole expr. * C-return - evaluate, copy, exit |
| d240a249 GM |
1668 | * insert - paste a number * backspace- delete backwards |
| 1669 | * delete - clear argument or list value or whole expression (twice) | |
| 1670 | * escape/q - exit." | |
| 1671 | (interactive) | |
| 1672 | (if (eq last-command 'calculator-help) | |
| 1673 | (let ((mode-name "Calculator") | |
| 1674 | (major-mode 'calculator-mode) | |
| 1675 | (g-map (current-global-map)) | |
| 1676 | (win (selected-window))) | |
| 1677 | (require 'ehelp) | |
| 1678 | (if calculator-electric-mode | |
| 1679 | (use-global-map calculator-saved-global-map)) | |
| cbb2dddb GM |
1680 | (if (or (not calculator-electric-mode) |
| 1681 | ;; XEmacs has a problem with electric-describe-mode | |
| 1682 | (string-match "XEmacs" (emacs-version))) | |
| 1683 | (describe-mode) | |
| 1684 | (electric-describe-mode)) | |
| d240a249 GM |
1685 | (if calculator-electric-mode |
| 1686 | (use-global-map g-map)) | |
| 1687 | (select-window win) ; these are for XEmacs (also below) | |
| 1688 | (message nil)) | |
| 1689 | (let ((one (one-window-p t)) | |
| 1690 | (win (selected-window)) | |
| 1691 | (help-buf (get-buffer-create "*Help*"))) | |
| 1692 | (save-window-excursion | |
| 1693 | (with-output-to-temp-buffer "*Help*" | |
| 1694 | (princ (documentation 'calculator-help))) | |
| 1695 | (if one | |
| 1696 | (shrink-window-if-larger-than-buffer | |
| 1697 | (get-buffer-window help-buf))) | |
| 1698 | (message | |
| 1699 | "`%s' again for more help, any other key continues normally." | |
| 1700 | (calculator-last-input)) | |
| 1701 | (select-window win) | |
| 1702 | (sit-for 360)) | |
| 1703 | (select-window win)))) | |
| 1704 | ||
| 1705 | (defun calculator-quit () | |
| 1706 | "Quit calculator." | |
| 1707 | (interactive) | |
| 1708 | (set-buffer calculator-buffer) | |
| 1709 | (let ((inhibit-read-only t)) (erase-buffer)) | |
| 1710 | (if (not calculator-electric-mode) | |
| 1711 | (progn | |
| 1712 | (condition-case nil | |
| 1713 | (while (get-buffer-window calculator-buffer) | |
| 1714 | (delete-window (get-buffer-window calculator-buffer))) | |
| 1715 | (error nil)) | |
| 1716 | (kill-buffer calculator-buffer))) | |
| 1717 | (setq calculator-buffer nil) | |
| 1718 | (message "Calculator done.") | |
| 1719 | (if calculator-electric-mode (throw 'calculator-done nil))) | |
| 1720 | ||
| 1721 | (defun calculator-save-and-quit () | |
| 1722 | "Quit the calculator, saving the result on the `kill-ring'." | |
| 1723 | (interactive) | |
| 1724 | (calculator-enter) | |
| 1725 | (calculator-copy) | |
| 1726 | (calculator-quit)) | |
| 1727 | ||
| d240a249 GM |
1728 | (defun calculator-repR (x) |
| 1729 | "Repeats the last binary operation with its second argument and X. | |
| 1730 | To use this, apply a binary operator (evaluate it), then call this." | |
| 1731 | (if calculator-last-opXY | |
| 1732 | ;; avoid rebinding calculator-last-opXY | |
| 1733 | (let ((calculator-last-opXY calculator-last-opXY)) | |
| 1734 | (calculator-funcall | |
| 1735 | (car calculator-last-opXY) x (nth 2 calculator-last-opXY))) | |
| 1736 | x)) | |
| 1737 | ||
| 1738 | (defun calculator-repL (x) | |
| 1739 | "Repeats the last binary operation with its first argument and X. | |
| 1740 | To use this, apply a binary operator (evaluate it), then call this." | |
| 1741 | (if calculator-last-opXY | |
| 1742 | ;; avoid rebinding calculator-last-opXY | |
| 1743 | (let ((calculator-last-opXY calculator-last-opXY)) | |
| 1744 | (calculator-funcall | |
| 1745 | (car calculator-last-opXY) (nth 1 calculator-last-opXY) x)) | |
| 1746 | x)) | |
| 1747 | ||
| 1748 | (defun calculator-fact (x) | |
| 1749 | "Simple factorial of X." | |
| 1750 | (let ((r (if (<= x 10) 1 1.0))) | |
| 1751 | (while (> x 0) | |
| 1752 | (setq r (* r (truncate x))) | |
| 1753 | (setq x (1- x))) | |
| 761d3eb3 | 1754 | (+ 0.0 r))) |
| d240a249 GM |
1755 | |
| 1756 | (defun calculator-truncate (n) | |
| 1757 | "Truncate N, return 0 in case of overflow." | |
| 1758 | (condition-case nil (truncate n) (error 0))) | |
| 1759 | ||
| 1760 | ||
| 1761 | (provide 'calculator) | |
| 1762 | ||
| ab5796a9 | 1763 | ;;; arch-tag: a1b9766c-af8a-4a74-b466-65ad8eeb0c73 |
| d240a249 | 1764 | ;;; calculator.el ends here |