HCoop / bpt / emacs.git / blame
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| d240a249 GM |
1 | ;;; calculator.el --- A simple pocket calculator. |
| 2 | ||
| 3 | ;; Copyright (C) 1998 by Free Software Foundation, Inc. | |
| 4 | ||
| 5 | ;; Author: Eli Barzilay <eli@lambda.cs.cornell.edu> | |
| 6 | ;; Keywords: tools, convenience | |
| 86f1e1ec | 7 | ;; Time-stamp: <2000-02-16 21:07:54 eli> |
| d240a249 GM |
8 | |
| 9 | ;; This file is part of GNU Emacs. | |
| 10 | ||
| 11 | ;; GNU Emacs is free software; you can redistribute it and/or modify it | |
| 12 | ;; under the terms of the GNU General Public License as published by the | |
| 13 | ;; Free Software Foundation; either version 2, or (at your option) any | |
| 14 | ;; later version. | |
| 15 | ||
| 16 | ;; GNU Emacs is distributed in the hope that it will be useful, but | |
| 17 | ;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 19 | ;; General Public License for more details. | |
| 20 | ||
| 21 | ;; You should have received a copy of the GNU General Public License | |
| 22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
| 23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
| 24 | ;; MA 02111-1307, USA. | |
| 25 | ||
| 26 | ;;; Commentary: | |
| 27 | ;; | |
| 28 | ;; A simple pocket calculator for Emacs. | |
| 29 | ;; Why touch your mouse to get xcalc (or calc.exe), when you have Emacs? | |
| 30 | ;; | |
| 31 | ;; If this is not part of your Emacs distribution, then simply bind | |
| 32 | ;; `calculator' to a key and make it an autoloaded function, e.g.: | |
| 33 | ;; (autoload 'calculator "calculator" | |
| 34 | ;; "Run the pocket calculator." t) | |
| 35 | ;; (global-set-key [(control return)] 'calculator) | |
| 36 | ;; | |
| 37 | ;; Written by Eli Barzilay: Maze is Life! eli@cs.cornell.edu | |
| 38 | ;; http://www.cs.cornell.edu/eli | |
| 39 | ;; | |
| 40 | ;; For latest version, check | |
| 41 | ;; http://www.cs.cornell.edu/eli/misc/calculator.el | |
| 42 | ||
| 43 | ||
| 44 | (eval-and-compile | |
| 45 | (if (fboundp 'defgroup) nil | |
| 46 | (defmacro defgroup (&rest forms) nil) | |
| 47 | (defmacro defcustom (s v d &rest r) (list 'defvar s v d)))) | |
| 48 | ||
| 49 | ;;; Customization: | |
| 50 | ||
| 51 | (defgroup calculator nil | |
| 52 | "Simple pocket calculator." | |
| 53 | :prefix "calculator" | |
| 7def2f92 | 54 | :version "21.1" |
| d240a249 GM |
55 | :group 'tools |
| 56 | :group 'convenience) | |
| 57 | ||
| 58 | (defcustom calculator-electric-mode nil | |
| 59 | "*Run `calculator' electrically, in the echo area. | |
| 60 | Note that if you use electric-mode, you wouldn't be able to use | |
| 61 | conventional help keys." | |
| 62 | :type 'boolean | |
| 63 | :group 'calculator) | |
| 64 | ||
| 86f1e1ec GM |
65 | (defcustom calculator-use-menu t |
| 66 | "*Make `calculator' create a menu. | |
| 67 | Note that this requires easymenu. Must be set before loading." | |
| 68 | :type 'boolean | |
| 69 | :group 'calculator) | |
| 70 | ||
| d240a249 GM |
71 | (defcustom calculator-bind-escape nil |
| 72 | "*If non-nil, set escape to exit the calculator." | |
| 73 | :type 'boolean | |
| 74 | :group 'calculator) | |
| 75 | ||
| 76 | (defcustom calculator-unary-style 'postfix | |
| 77 | "*Value is either 'prefix or 'postfix. | |
| 78 | This determines the default behavior of unary operators." | |
| 79 | :type '(choice (const prefix) (const postfix)) | |
| 80 | :group 'calculator) | |
| 81 | ||
| 82 | (defcustom calculator-prompt "Calculator=%s> " | |
| 83 | "*The prompt used by the pocket calculator. | |
| 84 | It should contain a \"%s\" somewhere that will indicate the i/o radixes, | |
| 85 | this string will be a two-character string as described in the | |
| 86 | documentation for `calculator-mode'." | |
| 87 | :type 'string | |
| 88 | :group 'calculator) | |
| 89 | ||
| 90 | (defcustom calculator-epsilon 1e-15 | |
| 91 | "*A threshold for results. | |
| 92 | If any result computed in `calculator-funcall' is smaller than this in | |
| 93 | its absolute value, then zero will be returned." | |
| 94 | :type 'number | |
| 95 | :group 'calculator) | |
| 96 | ||
| 97 | (defcustom calculator-number-format "%1.3f" | |
| 98 | "*The calculator's string used to display normal numbers." | |
| 99 | :type 'string | |
| 100 | :group 'calculator) | |
| 101 | ||
| 102 | (defcustom calculator-number-exp-ulimit 1e16 | |
| 103 | "*The calculator's upper limit for normal numbers." | |
| 104 | :type 'number | |
| 105 | :group 'calculator) | |
| 106 | ||
| 107 | (defcustom calculator-number-exp-llimit 0.001 | |
| 108 | "*The calculator's lower limit for normal numbers." | |
| 109 | :type 'number | |
| 110 | :group 'calculator) | |
| 111 | ||
| 112 | (defcustom calculator-number-exp-format "%g" | |
| 113 | "*The calculator's string used to display exponential numbers." | |
| 114 | :type 'string | |
| 115 | :group 'calculator) | |
| 116 | ||
| 117 | (defcustom calculator-show-integers t | |
| 118 | "*Non-nil value means delete all zero digits after the decimal point." | |
| 119 | :type 'boolean | |
| 120 | :group 'calculator) | |
| 121 | ||
| 122 | (defcustom calculator-2s-complement nil | |
| 123 | "*If non-nil, show negative numbers in 2s complement in radix modes. | |
| 124 | Otherwise show as a negative number." | |
| 125 | :type 'boolean | |
| 126 | :group 'calculator) | |
| 127 | ||
| 128 | (defcustom calculator-mode-hook nil | |
| 129 | "*List of hook functions run by `calculator-mode'." | |
| 130 | :type 'hook | |
| 131 | :group 'calculator) | |
| 132 | ||
| 133 | (defcustom calculator-user-registers nil | |
| 134 | "*An association list of user-defined register bindings. | |
| 135 | ||
| 136 | Each element in this list is a list of a character and a number that | |
| 137 | will be stored in that character's register. | |
| 138 | ||
| 139 | For example, use this to define the golden ratio number: | |
| 140 | (setq calculator-user-registers '((?g . 1.61803398875)))" | |
| 141 | :type '(repeat (cons character number)) | |
| 142 | :set '(lambda (_ val) | |
| 143 | (and (boundp 'calculator-registers) | |
| 144 | (setq calculator-registers | |
| 145 | (append val calculator-registers))) | |
| 146 | (setq calculator-user-registers val)) | |
| 147 | :group 'calculator) | |
| 148 | ||
| 149 | (defcustom calculator-user-operators nil | |
| 150 | "*A list of additional operators. | |
| 151 | ||
| 152 | This is a list in the same format as specified in the documentation for | |
| 153 | `calculator-operators', that you can use to bind additional calculator | |
| 154 | operators. It is probably not a good idea to modify this value with | |
| 155 | `customize' since it is too complex... | |
| 156 | ||
| 157 | Examples: | |
| 158 | ||
| 7def2f92 DL |
159 | * A very simple one, adding a postfix \"x-to-y\" conversion keys, using |
| 160 | t as a prefix key: | |
| d240a249 GM |
161 | |
| 162 | (setq calculator-user-operators | |
| 163 | '((\"tf\" cl-to-fr (+ 32 (/ (* X 9) 5)) 1) | |
| 164 | (\"tc\" fr-to-cl (/ (* (- X 32) 5) 9) 1) | |
| 165 | (\"tp\" kg-to-lb (/ X 0.453592) 1) | |
| 166 | (\"tk\" lb-to-kg (* X 0.453592) 1) | |
| 167 | (\"tF\" mt-to-ft (/ X 0.3048) 1) | |
| 168 | (\"tM\" ft-to-mt (* X 0.3048) 1))) | |
| 169 | ||
| 170 | * Using a function-like form is very simple, X for an argument (Y the | |
| 171 | second in case of a binary operator), TX is a truncated version of X | |
| 172 | and F does a recursive call, Here is a [very inefficient] Fibonacci | |
| 173 | number calculation: | |
| 174 | ||
| 175 | (add-to-list 'calculator-user-operators | |
| 176 | '(\"F\" fib (if (<= TX 1) | |
| 177 | 1 | |
| 178 | (+ (F (- TX 1)) (F (- TX 2)))) 0)) | |
| 179 | ||
| 180 | Note that this will be either postfix or prefix, according to | |
| 181 | `calculator-unary-style'." | |
| 182 | :type '(repeat (list string symbol sexp integer integer)) | |
| 183 | :group 'calculator) | |
| 184 | ||
| 185 | ;;; Code: | |
| 186 | ||
| 187 | (defvar calculator-initial-operators | |
| 86f1e1ec GM |
188 | '(;; "+"/"-" have keybindings of themselves, not calculator-ops |
| 189 | ("=" = identity 1 -1) | |
| d240a249 GM |
190 | (nobind "+" + + 2 4) |
| 191 | (nobind "-" - - 2 4) | |
| 192 | (nobind "+" + + -1 9) | |
| 193 | (nobind "-" - - -1 9) | |
| 86f1e1ec GM |
194 | ("(" \( identity -1 -1) |
| 195 | (")" \) identity +1 10) | |
| d240a249 GM |
196 | ;; normal keys |
| 197 | ("|" or (logior TX TY) 2 2) | |
| 198 | ("#" xor (logxor TX TY) 2 2) | |
| 199 | ("&" and (logand TX TY) 2 3) | |
| 200 | ("*" * * 2 5) | |
| 201 | ("/" / / 2 5) | |
| 202 | ("\\" div (/ TX TY) 2 5) | |
| 203 | ("%" rem (% TX TY) 2 5) | |
| 204 | ("L" log log 2 6) | |
| 205 | ("S" sin (sin DX) x 6) | |
| 206 | ("C" cos (cos DX) x 6) | |
| 207 | ("T" tan (tan DX) x 6) | |
| 208 | ("IS" asin (D (asin X)) x 6) | |
| 209 | ("IC" acos (D (acos X)) x 6) | |
| 210 | ("IT" atan (D (atan X)) x 6) | |
| 211 | ("Q" sqrt sqrt x 7) | |
| 212 | ("^" ^ expt 2 7) | |
| 213 | ("!" ! calculator-fact x 7) | |
| 214 | (";" 1/ (/ 1 X) 1 7) | |
| 215 | ("_" - - 1 8) | |
| 216 | ("~" ~ (lognot TX) x 8) | |
| 217 | (">" repR calculator-repR 1 8) | |
| 218 | ("<" repL calculator-repL 1 8) | |
| 219 | ("v" avg (/ (apply '+ L) (length L)) 0 8) | |
| 220 | ("l" tot (apply '+ L) 0 8) | |
| 221 | ) | |
| 222 | "A list of initial operators. | |
| 223 | ||
| 224 | This is a list in the same format as `calculator-operators'. Whenever | |
| 225 | `calculator' starts, it looks at the value of this variable, and if it | |
| 226 | is not empty, its contents is prepended to `calculator-operators' and | |
| 227 | the appropriate key bindings are made. | |
| 228 | ||
| 229 | This variable is then reset to nil. Don't use this if you want to add | |
| 230 | user-defined operators, use `calculator-user-operators' instead.") | |
| 231 | ||
| 232 | (defvar calculator-operators nil | |
| 233 | "The calculator operators, each a list with: | |
| 234 | ||
| 235 | 1. The key that is bound to for this operation (usually a string); | |
| 236 | ||
| 237 | 2. The displayed symbol for this function; | |
| 238 | ||
| 239 | 3. The function symbol, or a form that uses the variables `X' and `Y', | |
| 240 | (if it is a binary operator), `TX' and `TY' (truncated integer | |
| 241 | versions), `DX' (converted to radians if degrees mode is on), `D' | |
| 242 | (function for converting radians to degrees if deg mode is on), `L' | |
| 243 | (list of saved values), `F' (function for recursive iteration calls) | |
| 244 | and evaluates to the function value - these variables are capital; | |
| 245 | ||
| 246 | 4. The function's arity, optional, one of: 2=binary, -1=prefix unary, | |
| 247 | +1=postfix unary, 0=a 0-arg operator func, non-number=postfix/prefix | |
| 248 | as determined by `calculator-unary-style' (the default); | |
| 249 | ||
| 250 | 5. The function's precedence - should be in the range of 1=lowest to | |
| 251 | 9=highest (optional, defaults to 1); | |
| 252 | ||
| 253 | It it possible have a unary prefix version of a binary operator if it | |
| 254 | comes later in this list. If the list begins with the symbol 'nobind, | |
| 255 | then no key binding will take place - this is only useful for predefined | |
| 256 | keys. | |
| 257 | ||
| 258 | Use `calculator-user-operators' to add operators to this list, see its | |
| 259 | documentation for an example.") | |
| 260 | ||
| 261 | (defvar calculator-stack nil | |
| 262 | "Stack contents - operations and operands.") | |
| 263 | ||
| 264 | (defvar calculator-curnum nil | |
| 265 | "Current number being entered (as a string).") | |
| 266 | ||
| 267 | (defvar calculator-stack-display nil | |
| 268 | "Cons of the stack and its string representation.") | |
| 269 | ||
| 270 | (defvar calculator-char-radix | |
| 271 | '((?D . nil) (?B . bin) (?O . oct) (?H . hex) (?X . hex)) | |
| 272 | "A table to convert input characters to corresponding radix symbols.") | |
| 273 | ||
| 274 | (defvar calculator-output-radix nil | |
| 275 | "The mode for display, one of: nil (decimal), 'bin, 'oct or 'hex.") | |
| 276 | ||
| 277 | (defvar calculator-input-radix nil | |
| 278 | "The mode for input, one of: nil (decimal), 'bin, 'oct or 'hex.") | |
| 279 | ||
| 280 | (defvar calculator-deg nil | |
| 281 | "Non-nil if trig functions operate on degrees instead of radians.") | |
| 282 | ||
| 283 | (defvar calculator-saved-list nil | |
| 284 | "A list of saved values collected.") | |
| 285 | ||
| 286 | (defvar calculator-saved-ptr 0 | |
| 287 | "The pointer to the current saved number.") | |
| 288 | ||
| 289 | (defvar calculator-add-saved nil | |
| 290 | "Bound to t when a value should be added to the saved-list.") | |
| 291 | ||
| 292 | (defvar calculator-display-fragile nil | |
| 293 | "When non-nil, we see something that the next digit should replace.") | |
| 294 | ||
| 295 | (defvar calculator-buffer nil | |
| 296 | "The current calculator buffer.") | |
| 297 | ||
| d240a249 GM |
298 | (defvar calculator-last-opXY nil |
| 299 | "The last binary operation and its arguments. | |
| 300 | Used for repeating operations in calculator-repR/L.") | |
| 301 | ||
| 302 | (defvar calculator-registers ; use user-bindings first | |
| 303 | (append calculator-user-registers (list (cons ?e e) (cons ?p pi))) | |
| 304 | "The association list of calculator register values.") | |
| 305 | ||
| 306 | (defvar calculator-saved-global-map nil | |
| 307 | "Saved global key map.") | |
| 308 | ||
| 86f1e1ec GM |
309 | (defvar calculator-restart-other-mode nil |
| 310 | "Used to hack restarting with the mode electric mode changed.") | |
| 311 | ||
| d240a249 GM |
312 | (defvar calculator-mode-map nil |
| 313 | "The calculator key map.") | |
| 314 | ||
| 315 | (or calculator-mode-map | |
| 86f1e1ec | 316 | (let ((map (make-sparse-keymap))) |
| d240a249 GM |
317 | (suppress-keymap map t) |
| 318 | (define-key map "i" nil) | |
| 319 | (define-key map "o" nil) | |
| 86f1e1ec GM |
320 | (let ((p |
| 321 | '(("(" "[" "{") | |
| 322 | (")" "]" "}") | |
| 323 | (calculator-op-or-exp "+" "-" [kp-add] [kp-subtract]) | |
| 324 | (calculator-digit "0" "1" "2" "3" "4" "5" "6" "7" "8" | |
| 325 | "9" "a" "b" "c" "d" "f" | |
| 326 | [kp-0] [kp-1] [kp-2] [kp-3] [kp-4] | |
| 327 | [kp-5] [kp-6] [kp-7] [kp-8] [kp-9]) | |
| 328 | (calculator-op [kp-divide] [kp-multiply]) | |
| 329 | (calculator-decimal "." [kp-decimal]) | |
| 330 | (calculator-exp "e") | |
| 331 | (calculator-dec/deg-mode "D") | |
| 332 | (calculator-set-register "s") | |
| 333 | (calculator-get-register "g") | |
| 334 | (calculator-radix-mode "H" "X" "O" "B") | |
| 335 | (calculator-radix-input-mode "id" "ih" "ix" "io" "ib" | |
| 336 | "iD" "iH" "iX" "iO" "iB") | |
| 337 | (calculator-radix-output-mode "od" "oh" "ox" "oo" "ob" | |
| 338 | "oD" "oH" "oX" "oO" "oB") | |
| 339 | (calculator-saved-up [up] [?\C-p]) | |
| 340 | (calculator-saved-down [down] [?\C-n]) | |
| 341 | (calculator-quit "q" [?\C-g]) | |
| 342 | ("=" [enter] [linefeed] [kp-enter] | |
| 343 | [?\r] [?\n]) | |
| 344 | (calculator-save-on-list " " [space]) | |
| 345 | (calculator-clear-saved [?\C-c] [(control delete)]) | |
| 346 | (calculator-save-and-quit [(control return)] | |
| 347 | [(control kp-enter)]) | |
| 348 | (calculator-paste [insert] [(shift insert)]) | |
| 349 | (calculator-clear [delete] [?\C-?] [?\C-d]) | |
| 350 | (calculator-help [?h] [??] [f1] [help]) | |
| 351 | (calculator-copy [(control insert)]) | |
| 352 | (calculator-backspace [backspace]) | |
| 353 | ))) | |
| d240a249 | 354 | (while p |
| 86f1e1ec GM |
355 | ;; reverse the keys so first defs come last - makes the more |
| 356 | ;; sensible bindings visible in the menu | |
| 357 | (let ((func (car (car p))) (keys (reverse (cdr (car p))))) | |
| 358 | (while keys | |
| 359 | (define-key map (car keys) func) | |
| 360 | (setq keys (cdr keys)))) | |
| d240a249 GM |
361 | (setq p (cdr p)))) |
| 362 | (if calculator-bind-escape | |
| 363 | (progn (define-key map [?\e] 'calculator-quit) | |
| 364 | (define-key map [escape] 'calculator-quit)) | |
| 365 | (define-key map [?\e ?\e ?\e] 'calculator-quit)) | |
| 366 | ;; make C-h work in text-mode | |
| 367 | (or window-system (define-key map [?\C-h] 'calculator-backspace)) | |
| 86f1e1ec GM |
368 | ;; set up a menu |
| 369 | (if (and calculator-use-menu (not (boundp 'calculator-menu))) | |
| 370 | (let ((radix-selectors | |
| 371 | (mapcar (lambda (x) | |
| 372 | `([,(nth 0 x) | |
| 373 | (calculator-radix-mode ,(nth 2 x)) | |
| 374 | :style radio | |
| 375 | :keys ,(nth 2 x) | |
| 376 | :selected | |
| 377 | (and | |
| 378 | (eq calculator-input-radix ',(nth 1 x)) | |
| 379 | (eq calculator-output-radix ',(nth 1 x)))] | |
| 380 | [,(concat (nth 0 x) " Input") | |
| 381 | (calculator-radix-input-mode ,(nth 2 x)) | |
| 382 | :keys ,(concat "i" (downcase (nth 2 x))) | |
| 383 | :style radio | |
| 384 | :selected | |
| 385 | (eq calculator-input-radix ',(nth 1 x))] | |
| 386 | [,(concat (nth 0 x) " Output") | |
| 387 | (calculator-radix-output-mode ,(nth 2 x)) | |
| 388 | :keys ,(concat "o" (downcase (nth 2 x))) | |
| 389 | :style radio | |
| 390 | :selected | |
| 391 | (eq calculator-output-radix ',(nth 1 x))])) | |
| 392 | '(("Decimal" nil "D") | |
| 393 | ("Binary" bin "B") | |
| 394 | ("Octal" oct "O") | |
| 395 | ("Hexadecimal" hex "H")))) | |
| 396 | (op '(lambda (name key) | |
| 397 | `[,name (calculator-op ,key) :keys ,key]))) | |
| 398 | (easy-menu-define | |
| 399 | calculator-menu map "Calculator menu." | |
| 400 | `("Calculator" | |
| 401 | ["Help" | |
| 402 | (let ((last-command 'calculator-help)) (calculator-help)) | |
| 403 | :keys "?"] | |
| 404 | "---" | |
| 405 | ["Copy" calculator-copy] | |
| 406 | ["Paste" calculator-paste] | |
| 407 | "---" | |
| 408 | ["Electric mode" | |
| 409 | (progn (calculator-quit) | |
| 410 | (setq calculator-restart-other-mode t) | |
| 411 | (run-with-timer 0.1 nil '(lambda () (message nil))) | |
| 412 | ;; the message from the menu will be visible, | |
| 413 | ;; couldn't make it go away... | |
| 414 | (calculator)) | |
| 415 | :active (not calculator-electric-mode)] | |
| 416 | ["Normal mode" | |
| 417 | (progn (setq calculator-restart-other-mode t) | |
| 418 | (calculator-quit)) | |
| 419 | :active calculator-electric-mode] | |
| 420 | "---" | |
| 421 | ("Functions" | |
| 422 | ,(funcall op "Repeat-right" ">") | |
| 423 | ,(funcall op "Repeat-left" "<") | |
| 424 | "------General------" | |
| 425 | ,(funcall op "Reciprocal" ";") | |
| 426 | ,(funcall op "Log" "L") | |
| 427 | ,(funcall op "Square-root" "Q") | |
| 428 | ,(funcall op "Factorial" "!") | |
| 429 | "------Trigonometric------" | |
| 430 | ,(funcall op "Sinus" "S") | |
| 431 | ,(funcall op "Cosine" "C") | |
| 432 | ,(funcall op "Tangent" "T") | |
| 433 | ,(funcall op "Inv-Sinus" "IS") | |
| 434 | ,(funcall op "Inv-Cosine" "IC") | |
| 435 | ,(funcall op "Inv-Tangent" "IT") | |
| 436 | "------Bitwise------" | |
| 437 | ,(funcall op "Or" "|") | |
| 438 | ,(funcall op "Xor" "#") | |
| 439 | ,(funcall op "And" "&") | |
| 440 | ,(funcall op "Not" "~")) | |
| 441 | ("Saved List" | |
| 442 | ["Eval+Save" calculator-save-on-list] | |
| 443 | ["Prev number" calculator-saved-up] | |
| 444 | ["Next number" calculator-saved-down] | |
| 445 | ["Delete current" calculator-clear | |
| 446 | :active (and calculator-display-fragile | |
| 447 | calculator-saved-list | |
| 448 | (= (car calculator-stack) | |
| 449 | (nth calculator-saved-ptr | |
| 450 | calculator-saved-list)))] | |
| 451 | ["Delete all" calculator-clear-saved] | |
| 452 | "---" | |
| 453 | ,(funcall op "List-total" "l") | |
| 454 | ,(funcall op "List-average" "v")) | |
| 455 | ("Registers" | |
| 456 | ["Get register" calculator-get-register] | |
| 457 | ["Set register" calculator-set-register]) | |
| 458 | ("Modes" | |
| 459 | ["Radians" | |
| 460 | (progn | |
| 461 | (and (or calculator-input-radix calculator-output-radix) | |
| 462 | (calculator-radix-mode "D")) | |
| 463 | (and calculator-deg (calculator-dec/deg-mode))) | |
| 464 | :keys "D" | |
| 465 | :style radio | |
| 466 | :selected (not (or calculator-input-radix | |
| 467 | calculator-output-radix | |
| 468 | calculator-deg))] | |
| 469 | ["Degrees" | |
| 470 | (progn | |
| 471 | (and (or calculator-input-radix calculator-output-radix) | |
| 472 | (calculator-radix-mode "D")) | |
| 473 | (or calculator-deg (calculator-dec/deg-mode))) | |
| 474 | :keys "D" | |
| 475 | :style radio | |
| 476 | :selected (and calculator-deg | |
| 477 | (not (or calculator-input-radix | |
| 478 | calculator-output-radix)))] | |
| 479 | "---" | |
| 480 | ,@(mapcar 'car radix-selectors) | |
| 481 | ("Seperate I/O" | |
| 482 | ,@(mapcar (lambda (x) (nth 1 x)) radix-selectors) | |
| 483 | "---" | |
| 484 | ,@(mapcar (lambda (x) (nth 2 x)) radix-selectors))) | |
| 485 | "---" | |
| 486 | ["Copy+Quit" calculator-save-and-quit] | |
| 487 | ["Quit" calculator-quit])))) | |
| d240a249 GM |
488 | (setq calculator-mode-map map))) |
| 489 | ||
| 490 | (defun calculator-mode () | |
| 491 | "A simple pocket calculator in Emacs. | |
| 492 | ||
| 493 | This calculator is used in the same way as other popular calculators | |
| 494 | like xcalc or calc.exe - but using an Emacs interface. | |
| 495 | ||
| 496 | Expressions are entered using normal infix notation, parens are used as | |
| 497 | normal. Unary functions are usually postfix, but some depends on the | |
| 498 | value of `calculator-unary-style' (if the style for an operator below is | |
| 499 | specified, then it is fixed, otherwise it depends on this variable). | |
| 500 | `+' and `-' can be used as either binary operators or prefix unary | |
| 501 | operators. Numbers can be entered with exponential notation using `e', | |
| 502 | except when using a non-decimal radix mode for input (in this case `e' | |
| 503 | will be the hexadecimal digit). | |
| 504 | ||
| 505 | Here are the editing keys: | |
| 506 | * `RET' `=' evaluate the current expression | |
| 507 | * `C-insert' copy the whole current expression to the `kill-ring' | |
| 86f1e1ec | 508 | * `C-return' evaluate, save result the `kill-ring' and exit |
| d240a249 GM |
509 | * `insert' paste a number if the one was copied (normally) |
| 510 | * `delete' `C-d' clear last argument or whole expression (hit twice) | |
| 511 | * `backspace' delete a digit or a previous expression element | |
| 512 | * `h' `?' pop-up a quick reference help | |
| 513 | * `ESC' `q' exit (`ESC' can be used if `calculator-bind-escape' is | |
| 514 | non-nil, otherwise use three consecutive `ESC's) | |
| 515 | ||
| 516 | These operators are pre-defined: | |
| 517 | * `+' `-' `*' `/' the common binary operators | |
| 518 | * `\\' `%' integer division and reminder | |
| 519 | * `_' `;' postfix unary negation and reciprocal | |
| 520 | * `^' `L' binary operators for x^y and log(x) in base y | |
| 521 | * `Q' `!' unary square root and factorial | |
| 522 | * `S' `C' `T' unary trigonometric operators - sin, cos and tan | |
| 523 | * `|' `#' `&' `~' bitwise operators - or, xor, and, not | |
| 524 | ||
| 525 | The trigonometric functions can be inverted if prefixed with an `I', see | |
| 526 | below for the way to use degrees instead of the default radians. | |
| 527 | ||
| 528 | Two special postfix unary operators are `>' and `<': whenever a binary | |
| 529 | operator is performed, it is remembered along with its arguments; then | |
| 530 | `>' (`<') will apply the same operator with the same right (left) | |
| 531 | argument. | |
| 532 | ||
| 533 | hex/oct/bin modes can be set for input and for display separately. | |
| 534 | Another toggle-able mode is for using degrees instead of radians for | |
| 535 | trigonometric functions. | |
| 536 | The keys to switch modes are (`X' is shortcut for `H'): | |
| 537 | * `D' switch to all-decimal mode, or toggle degrees/radians | |
| 538 | * `B' `O' `H' `X' binary/octal/hexadecimal modes for input & display | |
| 539 | * `i' `o' followed by one of `D' `B' `O' `H' `X' (case | |
| 540 | insensitive) sets only the input or display radix mode | |
| 541 | The prompt indicates the current modes: | |
| 542 | * \"D=\": degrees mode; | |
| 543 | * \"?=\": (? is B/O/H) this is the radix for both input and output; | |
| 544 | * \"=?\": (? is B/O/H) the display radix (when input is decimal); | |
| 545 | * \"??\": (? is D/B/O/H) 1st char for input radix, 2nd for display. | |
| 546 | ||
| 547 | Values can be saved for future reference in either a list of saved | |
| 548 | values, or in registers. | |
| 549 | ||
| 550 | The list of saved values is useful for statistics operations on some | |
| 551 | collected data. It is possible to navigate in this list, and if the | |
| 552 | value shown is the current one on the list, an indication is displayed | |
| 553 | as \"[N]\" if this is the last number and there are N numbers, or | |
| 554 | \"[M/N]\" if the M-th value is shown. | |
| 555 | * `SPC' evaluate the current value as usual, but also adds | |
| 556 | the result to the list of saved values | |
| 557 | * `l' `v' computes total / average of saved values | |
| 558 | * `up' `C-p' browse to the previous value in the list | |
| 559 | * `down' `C-n' browse to the next value in the list | |
| 560 | * `delete' `C-d' remove current value from the list (if it is on it) | |
| 561 | * `C-delete' `C-c' delete the whole list | |
| 562 | ||
| 563 | Registers are variable-like place-holders for values: | |
| 564 | * `s' followed by a character attach the current value to that character | |
| 565 | * `g' followed by a character fetches the attached value | |
| 566 | ||
| 567 | There are many variables that can be used to customize the calculator. | |
| 568 | Some interesting customization variables are: | |
| 569 | * `calculator-electric-mode' use only the echo-area electrically. | |
| 570 | * `calculator-unary-style' set most unary ops to pre/postfix style. | |
| 571 | * `calculator-user-registers' to define user-preset registers. | |
| 572 | * `calculator-user-operators' to add user-defined operators. | |
| 573 | See the documentation for these variables, and \"calculator.el\" for | |
| 574 | more information. | |
| 575 | ||
| 576 | \\{calculator-mode-map}" | |
| 577 | (interactive) | |
| 578 | (kill-all-local-variables) | |
| 579 | (setq major-mode 'calculator-mode) | |
| 580 | (setq mode-name "Calculator") | |
| 581 | (use-local-map calculator-mode-map) | |
| 582 | (run-hooks 'calculator-mode-hook)) | |
| 583 | ||
| 584 | ;;;###autoload | |
| 585 | (defun calculator () | |
| 586 | "Run the pocket calculator. | |
| 587 | See the documentation for `calculator-mode' for more information." | |
| 588 | (interactive) | |
| 86f1e1ec GM |
589 | (if calculator-restart-other-mode |
| 590 | (setq calculator-electric-mode (not calculator-electric-mode))) | |
| d240a249 GM |
591 | (if calculator-initial-operators |
| 592 | (progn (calculator-add-operators calculator-initial-operators) | |
| 593 | (setq calculator-initial-operators nil) | |
| 594 | ;; don't change this since it is a customization variable, | |
| 595 | ;; its set function will add any new operators. | |
| 596 | (calculator-add-operators calculator-user-operators))) | |
| d240a249 GM |
597 | (if calculator-electric-mode |
| 598 | (save-window-excursion | |
| 86f1e1ec | 599 | (progn (require 'electric) (message nil)) ; hide load message |
| d240a249 GM |
600 | (let (old-g-map old-l-map (echo-keystrokes 0) |
| 601 | (garbage-collection-messages nil)) ; no gc msg when electric | |
| d240a249 GM |
602 | ;; strange behavior in FSF: doesn't always select correct |
| 603 | ;; minibuffer. I have no idea how to fix this | |
| 604 | (setq calculator-buffer (window-buffer (minibuffer-window))) | |
| 605 | (select-window (minibuffer-window)) | |
| 606 | (calculator-reset) | |
| 607 | (calculator-update-display) | |
| 608 | (setq old-l-map (current-local-map)) | |
| 609 | (setq old-g-map (current-global-map)) | |
| 610 | (setq calculator-saved-global-map (current-global-map)) | |
| 86f1e1ec | 611 | (use-local-map nil) |
| d240a249 GM |
612 | (use-global-map calculator-mode-map) |
| 613 | (unwind-protect | |
| 614 | (catch 'calculator-done | |
| 615 | (Electric-command-loop | |
| 616 | 'calculator-done | |
| 617 | ;; can't use 'noprompt, bug in electric.el | |
| 618 | '(lambda () 'noprompt) | |
| 619 | nil | |
| 86f1e1ec | 620 | (lambda (x y) (calculator-update-display)))) |
| d240a249 GM |
621 | (and calculator-buffer |
| 622 | (catch 'calculator-done (calculator-quit))) | |
| 623 | (use-local-map old-l-map) | |
| 624 | (use-global-map old-g-map)))) | |
| 86f1e1ec GM |
625 | (progn |
| 626 | (setq calculator-buffer | |
| 627 | (or (and (bufferp calculator-buffer) | |
| 628 | (buffer-live-p calculator-buffer) | |
| 629 | calculator-buffer) | |
| 630 | (if calculator-electric-mode | |
| 631 | (get-buffer-create "*calculator*") | |
| 632 | (let ((split-window-keep-point nil) | |
| 633 | (window-min-height 2)) | |
| 634 | (select-window | |
| 7def2f92 DL |
635 | ;; Maybe leave two lines for our window because |
| 636 | ;; of the normal `raised' modeline in Emacs 21. | |
| 637 | (split-window-vertically | |
| 638 | (- (window-height) | |
| 639 | (if (plist-get (face-attr-construct 'modeline) | |
| 640 | :box) | |
| 641 | 3 | |
| 642 | 2)))) | |
| 86f1e1ec GM |
643 | (switch-to-buffer |
| 644 | (get-buffer-create "*calculator*")))))) | |
| 645 | (set-buffer calculator-buffer) | |
| 646 | (calculator-mode) | |
| 647 | (setq buffer-read-only t) | |
| 648 | (calculator-reset) | |
| 649 | (message "Hit `?' For a quick help screen."))) | |
| 650 | (if (and calculator-restart-other-mode calculator-electric-mode) | |
| 651 | (calculator))) | |
| d240a249 GM |
652 | |
| 653 | (defun calculator-op-arity (op) | |
| 654 | "Return OP's arity, 2, +1 or -1." | |
| 655 | (let ((arity (or (nth 3 op) 'x))) | |
| 656 | (if (numberp arity) | |
| 657 | arity | |
| 658 | (if (eq calculator-unary-style 'postfix) +1 -1)))) | |
| 659 | ||
| 660 | (defun calculator-op-prec (op) | |
| 661 | "Return OP's precedence for reducing when inserting into the stack. | |
| 662 | Defaults to 1." | |
| 663 | (or (nth 4 op) 1)) | |
| 664 | ||
| 665 | (defun calculator-add-operators (more-ops) | |
| 666 | "This function handles operator addition. | |
| 667 | Adds MORE-OPS to `calculator-operator', called initially to handle | |
| 668 | `calculator-initial-operators' and `calculator-user-operators'." | |
| 669 | (let ((added-ops nil)) | |
| 670 | (while more-ops | |
| 671 | (or (eq (car (car more-ops)) 'nobind) | |
| 672 | (let ((i -1) (key (car (car more-ops)))) | |
| 673 | ;; make sure the key is undefined, so it's easy to define | |
| 674 | ;; prefix keys | |
| 675 | (while (< (setq i (1+ i)) (length key)) | |
| 676 | (or (keymapp | |
| 677 | (lookup-key calculator-mode-map | |
| 678 | (substring key 0 (1+ i)))) | |
| 679 | (progn | |
| 680 | (define-key | |
| 681 | calculator-mode-map (substring key 0 (1+ i)) nil) | |
| 682 | (setq i (length key))))) | |
| 683 | (define-key calculator-mode-map key 'calculator-op))) | |
| 684 | (setq added-ops (cons (if (eq (car (car more-ops)) 'nobind) | |
| 685 | (cdr (car more-ops)) | |
| 686 | (car more-ops)) | |
| 687 | added-ops)) | |
| 688 | (setq more-ops (cdr more-ops))) | |
| 689 | ;; added-ops come first, but in correct order | |
| 690 | (setq calculator-operators | |
| 691 | (append (nreverse added-ops) calculator-operators)))) | |
| 692 | ||
| 693 | (defun calculator-reset () | |
| 694 | "Reset calculator variables." | |
| 86f1e1ec GM |
695 | (or calculator-restart-other-mode |
| 696 | (setq calculator-stack nil | |
| 697 | calculator-curnum nil | |
| 698 | calculator-stack-display nil | |
| 699 | calculator-display-fragile nil)) | |
| 700 | (setq calculator-restart-other-mode nil) | |
| d240a249 GM |
701 | (calculator-update-display)) |
| 702 | ||
| 703 | (defun calculator-get-prompt () | |
| 704 | "Return a string to display. | |
| 705 | The string is set not to exceed the screen width." | |
| 706 | (let* ((calculator-prompt | |
| 707 | (format calculator-prompt | |
| 708 | (cond | |
| 709 | ((or calculator-output-radix calculator-input-radix) | |
| 710 | (if (eq calculator-output-radix | |
| 711 | calculator-input-radix) | |
| 712 | (concat | |
| 713 | (char-to-string | |
| 714 | (car (rassq calculator-output-radix | |
| 715 | calculator-char-radix))) | |
| 716 | "=") | |
| 717 | (concat | |
| 718 | (if calculator-input-radix | |
| 719 | (char-to-string | |
| 720 | (car (rassq calculator-input-radix | |
| 721 | calculator-char-radix))) | |
| 722 | "=") | |
| 723 | (char-to-string | |
| 724 | (car (rassq calculator-output-radix | |
| 725 | calculator-char-radix)))))) | |
| 726 | (calculator-deg "D=") | |
| 727 | (t "==")))) | |
| 728 | (prompt | |
| 729 | (concat calculator-prompt | |
| 730 | (cdr calculator-stack-display) | |
| 731 | (cond (calculator-curnum | |
| 732 | ;; number being typed | |
| 733 | (concat calculator-curnum "_")) | |
| 734 | ((and (= 1 (length calculator-stack)) | |
| 735 | calculator-display-fragile) | |
| 736 | ;; only the result is shown, next number will | |
| 737 | ;; restart | |
| 738 | nil) | |
| 739 | (t | |
| 740 | ;; waiting for a number or an operator | |
| 741 | "?")))) | |
| 742 | (trim (- (length prompt) (1- (window-width))))) | |
| 743 | (if (<= trim 0) | |
| 744 | prompt | |
| 745 | (concat calculator-prompt | |
| 746 | (substring prompt (+ trim (length calculator-prompt))))))) | |
| 747 | ||
| 748 | (defun calculator-curnum-value () | |
| 749 | "Get the numeric value of the displayed number string as a float." | |
| 750 | (if calculator-input-radix | |
| 751 | (let ((radix | |
| 752 | (cdr (assq calculator-input-radix | |
| 753 | '((bin . 2) (oct . 8) (hex . 16))))) | |
| 754 | (i -1) (value 0)) | |
| 755 | ;; assume valid input (upcased & characters in range) | |
| 756 | (while (< (setq i (1+ i)) (length calculator-curnum)) | |
| 757 | (setq value | |
| 758 | (+ (let ((ch (aref calculator-curnum i))) | |
| 759 | (- ch (if (<= ch ?9) ?0 (- ?A 10)))) | |
| 760 | (* radix value)))) | |
| 761 | value) | |
| 762 | (car | |
| 763 | (read-from-string | |
| 764 | (cond | |
| 765 | ((equal "." calculator-curnum) | |
| 766 | "0.0") | |
| 767 | ((string-match "[eE][+-]?$" calculator-curnum) | |
| 768 | (concat calculator-curnum "0")) | |
| 769 | ((string-match "\\.[0-9]\\|[eE]" calculator-curnum) | |
| 770 | calculator-curnum) | |
| 771 | ((string-match "\\." calculator-curnum) | |
| 772 | ;; do this because Emacs reads "23." as an integer. | |
| 773 | (concat calculator-curnum "0")) | |
| 774 | ((stringp calculator-curnum) | |
| 775 | (concat calculator-curnum ".0")) | |
| 776 | (t "0.0")))))) | |
| 777 | ||
| 778 | (defun calculator-num-to-string (num) | |
| 779 | "Convert NUM to a displayable string." | |
| 780 | (cond | |
| 781 | ((and (numberp num) calculator-output-radix) | |
| 782 | ;; print with radix - for binary I convert the octal number | |
| 783 | (let ((str (format (if (eq calculator-output-radix 'hex) "%x" "%o") | |
| 784 | (calculator-truncate | |
| 785 | (if calculator-2s-complement num (abs num)))))) | |
| 786 | (if (eq calculator-output-radix 'bin) | |
| 787 | (let ((i -1) (s "")) | |
| 788 | (while (< (setq i (1+ i)) (length str)) | |
| 789 | (setq s | |
| 790 | (concat s | |
| 791 | (cdr (assq (aref str i) | |
| 792 | '((?0 . "000") (?1 . "001") | |
| 793 | (?2 . "010") (?3 . "011") | |
| 794 | (?4 . "100") (?5 . "101") | |
| 795 | (?6 . "110") (?7 . "111"))))))) | |
| 796 | (string-match "^0*\\(.+\\)" s) | |
| 797 | (setq str (match-string 1 s)))) | |
| 798 | (upcase | |
| 799 | (if (and (not calculator-2s-complement) (< num 0)) | |
| 800 | (concat "-" str) | |
| 801 | str)))) | |
| 802 | ((and (numberp num) | |
| 803 | ;; is this a normal-range number? | |
| 804 | (>= (abs num) calculator-number-exp-llimit) | |
| 805 | (< (abs num) calculator-number-exp-ulimit)) | |
| 806 | (let ((str (format calculator-number-format num))) | |
| 807 | (cond | |
| 808 | ((and calculator-show-integers (string-match "\\.?0+$" str)) | |
| 809 | ;; remove all redundant zeros | |
| 810 | (substring str 0 (match-beginning 0))) | |
| 811 | ((and (not calculator-show-integers) | |
| 812 | (string-match "\\..\\(.*[^0]\\)?\\(0+\\)$" str)) | |
| 813 | ;; remove zeros, except for first after the "." | |
| 814 | (substring str 0 (match-beginning 2))) | |
| 815 | (t str)))) | |
| 816 | ((numberp num) (format calculator-number-exp-format num)) | |
| 817 | (t (prin1-to-string (nth 1 num) t)))) | |
| 818 | ||
| 819 | (defun calculator-update-display (&optional force) | |
| 820 | "Update the display. | |
| 821 | If optional argument FORCE is non-nil, don't use the cached string." | |
| 822 | (set-buffer calculator-buffer) | |
| 823 | ;; update calculator-stack-display | |
| 824 | (if (or force | |
| 825 | (not (eq (car calculator-stack-display) calculator-stack))) | |
| 826 | (setq calculator-stack-display | |
| 827 | (cons calculator-stack | |
| 828 | (if calculator-stack | |
| 829 | (concat | |
| 830 | (mapconcat 'calculator-num-to-string | |
| 831 | (reverse calculator-stack) | |
| 832 | " ") | |
| 833 | " " | |
| 834 | (and calculator-display-fragile | |
| 835 | calculator-saved-list | |
| 836 | (= (car calculator-stack) | |
| 837 | (nth calculator-saved-ptr | |
| 838 | calculator-saved-list)) | |
| 839 | (if (= 0 calculator-saved-ptr) | |
| 840 | (format "[%s]" (length calculator-saved-list)) | |
| 841 | (format "[%s/%s]" | |
| 842 | (- (length calculator-saved-list) | |
| 843 | calculator-saved-ptr) | |
| 844 | (length calculator-saved-list))))) | |
| 845 | "")))) | |
| 846 | (let ((inhibit-read-only t)) | |
| 847 | (erase-buffer) | |
| 848 | (insert (calculator-get-prompt))) | |
| 849 | (set-buffer-modified-p nil) | |
| 850 | (if calculator-display-fragile | |
| 851 | (goto-char (1+ (length calculator-prompt))) | |
| 852 | (goto-char (1- (point))))) | |
| 853 | ||
| 854 | (defun calculator-reduce-stack (prec) | |
| 855 | "Reduce the stack using top operator. | |
| 856 | PREC is a precedence - reduce everything with higher precedence." | |
| 857 | (while | |
| 858 | (cond | |
| 859 | ((and (cdr (cdr calculator-stack)) ; have three values | |
| 860 | (consp (nth 0 calculator-stack)) ; two operators & num | |
| 861 | (numberp (nth 1 calculator-stack)) | |
| 862 | (consp (nth 2 calculator-stack)) | |
| 863 | (eq '\) (nth 1 (nth 0 calculator-stack))) | |
| 864 | (eq '\( (nth 1 (nth 2 calculator-stack)))) | |
| 865 | ;; reduce "... ( x )" --> "... x" | |
| 866 | (setq calculator-stack | |
| 867 | (cons (nth 1 calculator-stack) | |
| 868 | (nthcdr 3 calculator-stack))) | |
| 869 | ;; another iteration | |
| 870 | t) | |
| 871 | ((and (cdr (cdr calculator-stack)) ; have three values | |
| 872 | (numberp (nth 0 calculator-stack)) ; two nums & operator | |
| 873 | (consp (nth 1 calculator-stack)) | |
| 874 | (numberp (nth 2 calculator-stack)) | |
| 875 | (= 2 (calculator-op-arity ; binary operator | |
| 876 | (nth 1 calculator-stack))) | |
| 877 | (<= prec ; with higher prec. | |
| 878 | (calculator-op-prec (nth 1 calculator-stack)))) | |
| 879 | ;; reduce "... x op y" --> "... r", r is the result | |
| 880 | (setq calculator-stack | |
| 881 | (cons (calculator-funcall | |
| 882 | (nth 2 (nth 1 calculator-stack)) | |
| 883 | (nth 2 calculator-stack) | |
| 884 | (nth 0 calculator-stack)) | |
| 885 | (nthcdr 3 calculator-stack))) | |
| 886 | ;; another iteration | |
| 887 | t) | |
| 888 | ((and (>= (length calculator-stack) 2) ; have two values | |
| 889 | (numberp (nth 0 calculator-stack)) ; number & operator | |
| 890 | (consp (nth 1 calculator-stack)) | |
| 891 | (= -1 (calculator-op-arity ; prefix-unary op | |
| 892 | (nth 1 calculator-stack))) | |
| 893 | (<= prec ; with higher prec. | |
| 894 | (calculator-op-prec (nth 1 calculator-stack)))) | |
| 895 | ;; reduce "... op x" --> "... r" for prefix op | |
| 896 | (setq calculator-stack | |
| 897 | (cons (calculator-funcall | |
| 898 | (nth 2 (nth 1 calculator-stack)) | |
| 899 | (nth 0 calculator-stack)) | |
| 900 | (nthcdr 2 calculator-stack))) | |
| 901 | ;; another iteration | |
| 902 | t) | |
| 903 | ((and (cdr calculator-stack) ; have two values | |
| 904 | (consp (nth 0 calculator-stack)) ; operator & number | |
| 905 | (numberp (nth 1 calculator-stack)) | |
| 906 | (= +1 (calculator-op-arity ; postfix-unary op | |
| 907 | (nth 0 calculator-stack))) | |
| 908 | (<= prec ; with higher prec. | |
| 909 | (calculator-op-prec (nth 0 calculator-stack)))) | |
| 910 | ;; reduce "... x op" --> "... r" for postfix op | |
| 911 | (setq calculator-stack | |
| 912 | (cons (calculator-funcall | |
| 913 | (nth 2 (nth 0 calculator-stack)) | |
| 914 | (nth 1 calculator-stack)) | |
| 915 | (nthcdr 2 calculator-stack))) | |
| 916 | ;; another iteration | |
| 917 | t) | |
| 918 | ((and calculator-stack ; have one value | |
| 919 | (consp (nth 0 calculator-stack)) ; an operator | |
| 920 | (= 0 (calculator-op-arity ; 0-ary op | |
| 921 | (nth 0 calculator-stack)))) | |
| 922 | ;; reduce "... op" --> "... r" for 0-ary op | |
| 923 | (setq calculator-stack | |
| 924 | (cons (calculator-funcall | |
| 925 | (nth 2 (nth 0 calculator-stack))) | |
| 926 | (nthcdr 1 calculator-stack))) | |
| 927 | ;; another iteration | |
| 928 | t) | |
| 929 | ((and (cdr calculator-stack) ; have two values | |
| 930 | (numberp (nth 0 calculator-stack)) ; both numbers | |
| 931 | (numberp (nth 1 calculator-stack))) | |
| 932 | ;; get rid of redundant numbers: | |
| 933 | ;; reduce "... y x" --> "... x" | |
| 934 | ;; needed for 0-ary ops that puts more values | |
| 935 | (setcdr calculator-stack (cdr (cdr calculator-stack)))) | |
| 936 | (t ;; no more iterations | |
| 937 | nil)))) | |
| 938 | ||
| 939 | (eval-when-compile ; silence the compiler | |
| 940 | (or (fboundp 'event-key) | |
| 941 | (defun event-key (&rest _) nil)) | |
| 942 | (or (fboundp 'key-press-event-p) | |
| 943 | (defun key-press-event-p (&rest _) nil))) | |
| 944 | ||
| 86f1e1ec GM |
945 | (defun calculator-last-input (&optional keys) |
| 946 | "Last char (or event or event sequence) that was read. | |
| 947 | Optional string argument KEYS will force using it as the keys entered." | |
| 948 | (let ((inp (or keys (this-command-keys)))) | |
| d240a249 GM |
949 | (if (or (stringp inp) (not (arrayp inp))) |
| 950 | inp | |
| 951 | ;; this translates kp-x to x and [tries to] create a string to | |
| 952 | ;; lookup operators | |
| 953 | (let* ((i -1) (converted-str (make-string (length inp) ? )) k) | |
| 954 | ;; converts an array to a string the ops lookup with keypad | |
| 955 | ;; input | |
| 956 | (while (< (setq i (1+ i)) (length inp)) | |
| 957 | (setq k (aref inp i)) | |
| 958 | ;; if Emacs will someday have a event-key, then this would | |
| 959 | ;; probably be modified anyway | |
| 960 | (and (fboundp 'event-key) (key-press-event-p k) | |
| 961 | (setq k (event-key k))) | |
| 962 | ;; assume all symbols are translatable with an ascii-character | |
| 963 | (and (symbolp k) | |
| 964 | (setq k (or (get k 'ascii-character) ? ))) | |
| 965 | (aset converted-str i k)) | |
| 966 | converted-str)))) | |
| 967 | ||
| 968 | (defun calculator-clear-fragile (&optional op) | |
| 969 | "Clear the fragile flag if it was set, then maybe reset all. | |
| 970 | OP is the operator (if any) that caused this call." | |
| 971 | (if (and calculator-display-fragile | |
| 972 | (or (not op) | |
| 973 | (= -1 (calculator-op-arity op)) | |
| 974 | (= 0 (calculator-op-arity op)))) | |
| 975 | ;; reset if last calc finished, and now get a num or prefix or 0-ary | |
| 976 | ;; op. | |
| 977 | (calculator-reset)) | |
| 978 | (setq calculator-display-fragile nil)) | |
| 979 | ||
| 980 | (defun calculator-digit () | |
| 981 | "Enter a single digit." | |
| 982 | (interactive) | |
| 983 | (let ((inp (aref (calculator-last-input) 0))) | |
| 984 | (if (and (or calculator-display-fragile | |
| 985 | (not (numberp (car calculator-stack)))) | |
| 986 | (cond | |
| 987 | ((not calculator-input-radix) (<= inp ?9)) | |
| 988 | ((eq calculator-input-radix 'bin) (<= inp ?1)) | |
| 989 | ((eq calculator-input-radix 'oct) (<= inp ?7)) | |
| 990 | (t t))) | |
| 991 | ;; enter digit if starting a new computation or have an op on the | |
| 992 | ;; stack. | |
| 993 | (progn | |
| 994 | (calculator-clear-fragile) | |
| 995 | (let ((digit (upcase (char-to-string inp)))) | |
| 996 | (if (equal calculator-curnum "0") | |
| 997 | (setq calculator-curnum nil)) | |
| 998 | (setq calculator-curnum | |
| 999 | (concat (or calculator-curnum "") digit))) | |
| 1000 | (calculator-update-display))))) | |
| 1001 | ||
| 1002 | (defun calculator-decimal () | |
| 1003 | "Enter a decimal period." | |
| 1004 | (interactive) | |
| 1005 | (if (and (not calculator-input-radix) | |
| 1006 | (or calculator-display-fragile | |
| 1007 | (not (numberp (car calculator-stack)))) | |
| 1008 | (not (and calculator-curnum | |
| 1009 | (string-match "[.eE]" calculator-curnum)))) | |
| 1010 | ;; enter the period on the same condition as a digit, only if no | |
| 1011 | ;; period or exponent entered yet. | |
| 1012 | (progn | |
| 1013 | (calculator-clear-fragile) | |
| 1014 | (setq calculator-curnum (concat (or calculator-curnum "0") ".")) | |
| 1015 | (calculator-update-display)))) | |
| 1016 | ||
| 1017 | (defun calculator-exp () | |
| 1018 | "Enter an `E' exponent character, or a digit in hex input mode." | |
| 1019 | (interactive) | |
| 1020 | (if calculator-input-radix | |
| 1021 | (calculator-digit) | |
| 1022 | (if (and (or calculator-display-fragile | |
| 1023 | (not (numberp (car calculator-stack)))) | |
| 1024 | (not (and calculator-curnum | |
| 1025 | (string-match "[eE]" calculator-curnum)))) | |
| 1026 | ;; same condition as above, also no E so far. | |
| 1027 | (progn | |
| 1028 | (calculator-clear-fragile) | |
| 1029 | (setq calculator-curnum (concat (or calculator-curnum "1") "e")) | |
| 1030 | (calculator-update-display))))) | |
| 1031 | ||
| 86f1e1ec GM |
1032 | (defun calculator-op (&optional keys) |
| 1033 | "Enter an operator on the stack, doing all necessary reductions. | |
| 1034 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 | 1035 | (interactive) |
| 86f1e1ec | 1036 | (let* ((last-inp (calculator-last-input keys)) |
| d240a249 GM |
1037 | (op (assoc last-inp calculator-operators))) |
| 1038 | (calculator-clear-fragile op) | |
| 1039 | (if (and calculator-curnum (/= (calculator-op-arity op) 0)) | |
| 1040 | (setq calculator-stack | |
| 1041 | (cons (calculator-curnum-value) calculator-stack))) | |
| 1042 | (setq calculator-curnum nil) | |
| 1043 | (if (and (= 2 (calculator-op-arity op)) | |
| 1044 | (not (and calculator-stack | |
| 1045 | (numberp (nth 0 calculator-stack))))) | |
| 1046 | ;; we have a binary operator but no number - search for a prefix | |
| 1047 | ;; version | |
| 1048 | (let ((rest-ops calculator-operators)) | |
| 1049 | (while (not (equal last-inp (car (car rest-ops)))) | |
| 1050 | (setq rest-ops (cdr rest-ops))) | |
| 1051 | (setq op (assoc last-inp (cdr rest-ops))) | |
| 1052 | (if (not (and op (= -1 (calculator-op-arity op)))) | |
| 1053 | (error "Binary operator without a first operand")))) | |
| 1054 | (calculator-reduce-stack | |
| 1055 | (cond ((eq (nth 1 op) '\() 10) | |
| 1056 | ((eq (nth 1 op) '\)) 0) | |
| 1057 | (t (calculator-op-prec op)))) | |
| 1058 | (if (or (and (= -1 (calculator-op-arity op)) | |
| 1059 | (numberp (car calculator-stack))) | |
| 1060 | (and (/= (calculator-op-arity op) -1) | |
| 1061 | (/= (calculator-op-arity op) 0) | |
| 1062 | (not (numberp (car calculator-stack))))) | |
| 1063 | (error "Unterminated expression")) | |
| 1064 | (setq calculator-stack (cons op calculator-stack)) | |
| 1065 | (calculator-reduce-stack (calculator-op-prec op)) | |
| 1066 | (and (= (length calculator-stack) 1) | |
| 1067 | (numberp (nth 0 calculator-stack)) | |
| 1068 | ;; the display is fragile if it contains only one number | |
| 1069 | (setq calculator-display-fragile t) | |
| 1070 | ;; add number to the saved-list | |
| 1071 | calculator-add-saved | |
| 1072 | (if (= 0 calculator-saved-ptr) | |
| 1073 | (setq calculator-saved-list | |
| 1074 | (cons (car calculator-stack) calculator-saved-list)) | |
| 1075 | (let ((p (nthcdr (1- calculator-saved-ptr) | |
| 1076 | calculator-saved-list))) | |
| 1077 | (setcdr p (cons (car calculator-stack) (cdr p)))))) | |
| 1078 | (calculator-update-display))) | |
| 1079 | ||
| 1080 | (defun calculator-op-or-exp () | |
| 1081 | "Either enter an operator or a digit. | |
| 1082 | Used with +/- for entering them as digits in numbers like 1e-3." | |
| 1083 | (interactive) | |
| 1084 | (if (and (not calculator-display-fragile) | |
| 1085 | calculator-curnum | |
| 1086 | (string-match "[eE]$" calculator-curnum)) | |
| 1087 | (calculator-digit) | |
| 1088 | (calculator-op))) | |
| 1089 | ||
| 1090 | (defun calculator-dec/deg-mode () | |
| 1091 | "Set decimal mode for display & input, if decimal, toggle deg mode." | |
| 1092 | (interactive) | |
| 1093 | (if calculator-curnum | |
| 1094 | (setq calculator-stack | |
| 1095 | (cons (calculator-curnum-value) calculator-stack))) | |
| 1096 | (setq calculator-curnum nil) | |
| 1097 | (if (or calculator-input-radix calculator-output-radix) | |
| 1098 | (progn (setq calculator-input-radix nil) | |
| 1099 | (setq calculator-output-radix nil)) | |
| 1100 | ;; already decimal - toggle degrees mode | |
| 1101 | (setq calculator-deg (not calculator-deg))) | |
| 1102 | (calculator-update-display t)) | |
| 1103 | ||
| 86f1e1ec GM |
1104 | (defun calculator-radix-mode (&optional keys) |
| 1105 | "Set input and display radix modes. | |
| 1106 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 | 1107 | (interactive) |
| 86f1e1ec GM |
1108 | (calculator-radix-input-mode keys) |
| 1109 | (calculator-radix-output-mode keys)) | |
| d240a249 | 1110 | |
| 86f1e1ec GM |
1111 | (defun calculator-radix-input-mode (&optional keys) |
| 1112 | "Set input radix modes. | |
| 1113 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 GM |
1114 | (interactive) |
| 1115 | (if calculator-curnum | |
| 1116 | (setq calculator-stack | |
| 1117 | (cons (calculator-curnum-value) calculator-stack))) | |
| 1118 | (setq calculator-curnum nil) | |
| 1119 | (setq calculator-input-radix | |
| 86f1e1ec | 1120 | (let ((inp (calculator-last-input keys))) |
| d240a249 GM |
1121 | (cdr (assq (upcase (aref inp (1- (length inp)))) |
| 1122 | calculator-char-radix)))) | |
| 1123 | (calculator-update-display)) | |
| 1124 | ||
| 86f1e1ec GM |
1125 | (defun calculator-radix-output-mode (&optional keys) |
| 1126 | "Set display radix modes. | |
| 1127 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 GM |
1128 | (interactive) |
| 1129 | (if calculator-curnum | |
| 1130 | (setq calculator-stack | |
| 1131 | (cons (calculator-curnum-value) calculator-stack))) | |
| 1132 | (setq calculator-curnum nil) | |
| 1133 | (setq calculator-output-radix | |
| 86f1e1ec | 1134 | (let ((inp (calculator-last-input keys))) |
| d240a249 GM |
1135 | (cdr (assq (upcase (aref inp (1- (length inp)))) |
| 1136 | calculator-char-radix)))) | |
| 1137 | (calculator-update-display t)) | |
| 1138 | ||
| 1139 | (defun calculator-save-on-list () | |
| 1140 | "Evaluate current expression, put result on the saved values list." | |
| 1141 | (interactive) | |
| 1142 | (let ((calculator-add-saved t)) ; marks the result to be added | |
| 1143 | (calculator-enter))) | |
| 1144 | ||
| 1145 | (defun calculator-clear-saved () | |
| 1146 | "Clear the list of saved values in `calculator-saved-list'." | |
| 1147 | (interactive) | |
| 1148 | (setq calculator-saved-list nil) | |
| 1149 | (calculator-update-display t)) | |
| 1150 | ||
| 1151 | (defun calculator-saved-move (n) | |
| 1152 | "Go N elements up the list of saved values." | |
| 1153 | (interactive) | |
| 1154 | (and calculator-saved-list | |
| 1155 | (or (null calculator-stack) calculator-display-fragile) | |
| 1156 | (progn | |
| 1157 | (setq calculator-saved-ptr | |
| 1158 | (max (min (+ n calculator-saved-ptr) | |
| 1159 | (length calculator-saved-list)) | |
| 1160 | 0)) | |
| 1161 | (if (nth calculator-saved-ptr calculator-saved-list) | |
| 1162 | (setq calculator-stack | |
| 1163 | (list (nth calculator-saved-ptr calculator-saved-list)) | |
| 1164 | calculator-display-fragile t) | |
| 86f1e1ec GM |
1165 | (calculator-reset)) |
| 1166 | (calculator-update-display)))) | |
| d240a249 GM |
1167 | |
| 1168 | (defun calculator-saved-up () | |
| 1169 | "Go up the list of saved values." | |
| 1170 | (interactive) | |
| 1171 | (calculator-saved-move +1)) | |
| 1172 | ||
| 1173 | (defun calculator-saved-down () | |
| 1174 | "Go down the list of saved values." | |
| 1175 | (interactive) | |
| 1176 | (calculator-saved-move -1)) | |
| 1177 | ||
| 1178 | (defun calculator-open-paren () | |
| 1179 | "Equivalents of `(' use this." | |
| 1180 | (interactive) | |
| 86f1e1ec | 1181 | (calculator-op "(")) |
| d240a249 GM |
1182 | |
| 1183 | (defun calculator-close-paren () | |
| 1184 | "Equivalents of `)' use this." | |
| 1185 | (interactive) | |
| 86f1e1ec | 1186 | (calculator-op ")")) |
| d240a249 GM |
1187 | |
| 1188 | (defun calculator-enter () | |
| 86f1e1ec | 1189 | "Evaluate current expression." |
| d240a249 | 1190 | (interactive) |
| 86f1e1ec | 1191 | (calculator-op "=")) |
| d240a249 GM |
1192 | |
| 1193 | (defun calculator-backspace () | |
| 1194 | "Backward delete a single digit or a stack element." | |
| 1195 | (interactive) | |
| 1196 | (if calculator-curnum | |
| 1197 | (setq calculator-curnum | |
| 1198 | (if (> (length calculator-curnum) 1) | |
| 1199 | (substring calculator-curnum | |
| 1200 | 0 (1- (length calculator-curnum))) | |
| 1201 | nil)) | |
| 1202 | (setq calculator-stack (cdr calculator-stack))) | |
| 1203 | (calculator-update-display)) | |
| 1204 | ||
| 1205 | (defun calculator-clear () | |
| 1206 | "Clear current number." | |
| 1207 | (interactive) | |
| 1208 | (setq calculator-curnum nil) | |
| 1209 | (cond | |
| 1210 | ;; if the current number is from the saved-list - remove it | |
| 1211 | ((and calculator-display-fragile | |
| 1212 | calculator-saved-list | |
| 1213 | (= (car calculator-stack) | |
| 1214 | (nth calculator-saved-ptr calculator-saved-list))) | |
| 1215 | (if (= 0 calculator-saved-ptr) | |
| 1216 | (setq calculator-saved-list (cdr calculator-saved-list)) | |
| 1217 | (let ((p (nthcdr (1- calculator-saved-ptr) | |
| 1218 | calculator-saved-list))) | |
| 1219 | (setcdr p (cdr (cdr p))) | |
| 1220 | (setq calculator-saved-ptr (1- calculator-saved-ptr)))) | |
| 1221 | (if calculator-saved-list | |
| 1222 | (setq calculator-stack | |
| 1223 | (list (nth calculator-saved-ptr calculator-saved-list))) | |
| 1224 | (calculator-reset))) | |
| 1225 | ;; reset if fragile or double clear | |
| 1226 | ((or calculator-display-fragile (eq last-command this-command)) | |
| 1227 | (calculator-reset))) | |
| 1228 | (calculator-update-display)) | |
| 1229 | ||
| 1230 | (defun calculator-copy () | |
| 1231 | "Copy current number to the `kill-ring'." | |
| 1232 | (interactive) | |
| 1233 | (calculator-enter) | |
| 1234 | ;; remove trailing .0 and spaces .0 | |
| 1235 | (let ((s (cdr calculator-stack-display))) | |
| 1236 | (if (string-match "^\\(.*[^ ]\\) *$" s) | |
| 1237 | (setq s (match-string 1 s))) | |
| 1238 | (kill-new s))) | |
| 1239 | ||
| 1240 | (defun calculator-set-register (reg) | |
| 1241 | "Set a register value for REG." | |
| 1242 | (interactive "cRegister to store into: ") | |
| 1243 | (let* ((as (assq reg calculator-registers)) | |
| 1244 | (val (progn (calculator-enter) (car calculator-stack)))) | |
| 1245 | (if as | |
| 1246 | (setcdr as val) | |
| 1247 | (setq calculator-registers | |
| 1248 | (cons (cons reg val) calculator-registers))) | |
| 1249 | (message (format "[%c] := %S" reg val)))) | |
| 1250 | ||
| 1251 | (defun calculator-put-value (val) | |
| 1252 | "Paste VAL as if entered. | |
| 1253 | Used by `calculator-paste' and `get-register'." | |
| 1254 | (if (and (numberp val) | |
| 1255 | ;; (not calculator-curnum) | |
| 1256 | (or calculator-display-fragile | |
| 1257 | (not (numberp (car calculator-stack))))) | |
| 1258 | (progn | |
| 1259 | (calculator-clear-fragile) | |
| 1260 | (setq calculator-curnum (calculator-num-to-string val)) | |
| 1261 | (calculator-update-display)))) | |
| 1262 | ||
| 1263 | (defun calculator-paste () | |
| 1264 | "Paste a value from the `kill-ring'." | |
| 1265 | (interactive) | |
| 1266 | (calculator-put-value | |
| 1267 | (condition-case nil (car (read-from-string (current-kill 0))) | |
| 1268 | (error nil)))) | |
| 1269 | ||
| 1270 | (defun calculator-get-register (reg) | |
| 1271 | "Get a value from a register REG." | |
| 1272 | (interactive "cRegister to get value from: ") | |
| 1273 | (calculator-put-value (cdr (assq reg calculator-registers)))) | |
| 1274 | ||
| 1275 | (defun calculator-help () | |
| 1276 | ;; this is used as the quick reference screen you get with `h' | |
| 1277 | "Quick reference: | |
| 1278 | * numbers/operators/parens/./e - enter expressions | |
| 1279 | + - * / \\(div) %(rem) _(-X,postfix) ;(1/X,postfix) ^(exp) L(og) | |
| 1280 | Q(sqrt) !(fact) S(in) C(os) T(an) |(or) #(xor) &(and) ~(not) | |
| 1281 | * >/< repeats last binary operation with its 2nd (1st) arg as postfix op | |
| 1282 | * I inverses next trig function | |
| 1283 | * D - switch to all-decimal mode, or toggles deg/rad mode | |
| 1284 | * B/O/H/X - binary/octal/hex mode for i/o (X is a shortcut for H) | |
| 1285 | * i/o - prefix for d/b/o/x - set only input/output modes | |
| 1286 | * enter/= - evaluate current expr. * s/g - set/get a register | |
| 1287 | * space - evaluate & save on list * l/v - list total/average | |
| 1288 | * up/down/C-p/C-n - browse saved * C-delete - clear all saved | |
| 86f1e1ec | 1289 | * C-insert - copy whole expr. * C-return - evaluate, copy, exit |
| d240a249 GM |
1290 | * insert - paste a number * backspace- delete backwards |
| 1291 | * delete - clear argument or list value or whole expression (twice) | |
| 1292 | * escape/q - exit." | |
| 1293 | (interactive) | |
| 1294 | (if (eq last-command 'calculator-help) | |
| 1295 | (let ((mode-name "Calculator") | |
| 1296 | (major-mode 'calculator-mode) | |
| 1297 | (g-map (current-global-map)) | |
| 1298 | (win (selected-window))) | |
| 1299 | (require 'ehelp) | |
| 1300 | (if calculator-electric-mode | |
| 1301 | (use-global-map calculator-saved-global-map)) | |
| 1302 | (electric-describe-mode) | |
| 1303 | (if calculator-electric-mode | |
| 1304 | (use-global-map g-map)) | |
| 1305 | (select-window win) ; these are for XEmacs (also below) | |
| 1306 | (message nil)) | |
| 1307 | (let ((one (one-window-p t)) | |
| 1308 | (win (selected-window)) | |
| 1309 | (help-buf (get-buffer-create "*Help*"))) | |
| 1310 | (save-window-excursion | |
| 1311 | (with-output-to-temp-buffer "*Help*" | |
| 1312 | (princ (documentation 'calculator-help))) | |
| 1313 | (if one | |
| 1314 | (shrink-window-if-larger-than-buffer | |
| 1315 | (get-buffer-window help-buf))) | |
| 1316 | (message | |
| 1317 | "`%s' again for more help, any other key continues normally." | |
| 1318 | (calculator-last-input)) | |
| 1319 | (select-window win) | |
| 1320 | (sit-for 360)) | |
| 1321 | (select-window win)))) | |
| 1322 | ||
| 1323 | (defun calculator-quit () | |
| 1324 | "Quit calculator." | |
| 1325 | (interactive) | |
| 1326 | (set-buffer calculator-buffer) | |
| 1327 | (let ((inhibit-read-only t)) (erase-buffer)) | |
| 1328 | (if (not calculator-electric-mode) | |
| 1329 | (progn | |
| 1330 | (condition-case nil | |
| 1331 | (while (get-buffer-window calculator-buffer) | |
| 1332 | (delete-window (get-buffer-window calculator-buffer))) | |
| 1333 | (error nil)) | |
| 1334 | (kill-buffer calculator-buffer))) | |
| 1335 | (setq calculator-buffer nil) | |
| 1336 | (message "Calculator done.") | |
| 1337 | (if calculator-electric-mode (throw 'calculator-done nil))) | |
| 1338 | ||
| 1339 | (defun calculator-save-and-quit () | |
| 1340 | "Quit the calculator, saving the result on the `kill-ring'." | |
| 1341 | (interactive) | |
| 1342 | (calculator-enter) | |
| 1343 | (calculator-copy) | |
| 1344 | (calculator-quit)) | |
| 1345 | ||
| 1346 | (defun calculator-funcall (f &optional X Y) | |
| 1347 | "If F is a symbol, evaluate (F X Y). | |
| 1348 | Otherwise, it should be a list, evaluate it with X, Y bound to the | |
| 1349 | arguments." | |
| 1350 | ;; remember binary ops for calculator-repR/L | |
| 1351 | (if Y (setq calculator-last-opXY (list f X Y))) | |
| 1352 | (condition-case nil | |
| 1353 | (let ((result | |
| 1354 | (if (symbolp f) | |
| 1355 | (cond ((and X Y) (funcall f X Y)) | |
| 1356 | (X (funcall f X)) | |
| 1357 | (t (funcall f))) | |
| 1358 | ;; f is an expression | |
| 1359 | (let* ((__f__ f) ; so we can get this value below... | |
| 1360 | (TX (calculator-truncate X)) | |
| 1361 | (TY (and Y (calculator-truncate Y))) | |
| 1362 | (DX (if calculator-deg (/ (* X pi) 180) X)) | |
| 1363 | (L calculator-saved-list) | |
| 1364 | (Fbound (fboundp 'F)) | |
| 1365 | (Fsave (and Fbound (symbol-function 'F))) | |
| 1366 | (Dbound (fboundp 'D)) | |
| 1367 | (Dsave (and Dbound (symbol-function 'D)))) | |
| 1368 | ;; a shortened version of flet | |
| 1369 | (fset 'F (function | |
| 1370 | (lambda (&optional x y) | |
| 1371 | (calculator-funcall __f__ x y)))) | |
| 1372 | (fset 'D (function | |
| 1373 | (lambda (x) | |
| 1374 | (if calculator-deg (/ (* x 180) pi) x)))) | |
| 1375 | (unwind-protect (eval f) | |
| 1376 | (if Fbound (fset 'F Fsave) (fmakunbound 'F)) | |
| 1377 | (if Dbound (fset 'D Dsave) (fmakunbound 'D))))))) | |
| 1378 | (if (< (abs result) calculator-epsilon) | |
| 1379 | 0 | |
| 1380 | result)) | |
| 1381 | (error 0))) | |
| 1382 | ||
| 1383 | (defun calculator-repR (x) | |
| 1384 | "Repeats the last binary operation with its second argument and X. | |
| 1385 | To use this, apply a binary operator (evaluate it), then call this." | |
| 1386 | (if calculator-last-opXY | |
| 1387 | ;; avoid rebinding calculator-last-opXY | |
| 1388 | (let ((calculator-last-opXY calculator-last-opXY)) | |
| 1389 | (calculator-funcall | |
| 1390 | (car calculator-last-opXY) x (nth 2 calculator-last-opXY))) | |
| 1391 | x)) | |
| 1392 | ||
| 1393 | (defun calculator-repL (x) | |
| 1394 | "Repeats the last binary operation with its first argument and X. | |
| 1395 | To use this, apply a binary operator (evaluate it), then call this." | |
| 1396 | (if calculator-last-opXY | |
| 1397 | ;; avoid rebinding calculator-last-opXY | |
| 1398 | (let ((calculator-last-opXY calculator-last-opXY)) | |
| 1399 | (calculator-funcall | |
| 1400 | (car calculator-last-opXY) (nth 1 calculator-last-opXY) x)) | |
| 1401 | x)) | |
| 1402 | ||
| 1403 | (defun calculator-fact (x) | |
| 1404 | "Simple factorial of X." | |
| 1405 | (let ((r (if (<= x 10) 1 1.0))) | |
| 1406 | (while (> x 0) | |
| 1407 | (setq r (* r (truncate x))) | |
| 1408 | (setq x (1- x))) | |
| 1409 | r)) | |
| 1410 | ||
| 1411 | (defun calculator-truncate (n) | |
| 1412 | "Truncate N, return 0 in case of overflow." | |
| 1413 | (condition-case nil (truncate n) (error 0))) | |
| 1414 | ||
| 1415 | ||
| 1416 | (provide 'calculator) | |
| 1417 | ||
| 1418 | ;;; calculator.el ends here |