HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| e8af40ee | 1 | ;;; calculator.el --- a [not so] simple calculator for Emacs |
| d240a249 | 2 | |
| ab422c4d | 3 | ;; Copyright (C) 1998, 2000-2013 Free Software Foundation, Inc. |
| d240a249 | 4 | |
| 4ece8d61 | 5 | ;; Author: Eli Barzilay <eli@barzilay.org> |
| d240a249 | 6 | ;; Keywords: tools, convenience |
| d240a249 GM |
7 | |
| 8 | ;; This file is part of GNU Emacs. | |
| 9 | ||
| eb3fa2cf GM |
10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
| 11 | ;; it under the terms of the GNU General Public License as published by | |
| 12 | ;; the Free Software Foundation, either version 3 of the License, or | |
| 13 | ;; (at your option) any later version. | |
| d240a249 | 14 | |
| eb3fa2cf GM |
15 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 18 | ;; GNU General Public License for more details. | |
| d240a249 GM |
19 | |
| 20 | ;; You should have received a copy of the GNU General Public License | |
| eb3fa2cf | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
| d240a249 | 22 | |
| cbb2dddb | 23 | ;;;===================================================================== |
| d240a249 GM |
24 | ;;; Commentary: |
| 25 | ;; | |
| 25c269ef | 26 | ;; A calculator for Emacs. |
| 5ca425fc | 27 | ;; Why should you reach for your mouse to get xcalc (calc.exe, gcalc or |
| 25c269ef | 28 | ;; whatever), when you have Emacs running already? |
| d240a249 GM |
29 | ;; |
| 30 | ;; If this is not part of your Emacs distribution, then simply bind | |
| 31 | ;; `calculator' to a key and make it an autoloaded function, e.g.: | |
| 32 | ;; (autoload 'calculator "calculator" | |
| 25c269ef | 33 | ;; "Run the Emacs calculator." t) |
| d240a249 GM |
34 | ;; (global-set-key [(control return)] 'calculator) |
| 35 | ;; | |
| 25c269ef DL |
36 | ;; Written by Eli Barzilay: Maze is Life! eli@barzilay.org |
| 37 | ;; http://www.barzilay.org/ | |
| d240a249 GM |
38 | ;; |
| 39 | ;; For latest version, check | |
| 25c269ef | 40 | ;; http://www.barzilay.org/misc/calculator.el |
| 4351784f GM |
41 | ;; |
| 42 | ||
| 43 | ;;; History: | |
| 44 | ;; I hate history. | |
| d240a249 | 45 | |
| cbb2dddb | 46 | ;;;===================================================================== |
| d240a249 GM |
47 | ;;; Customization: |
| 48 | ||
| 49 | (defgroup calculator nil | |
| 25c269ef | 50 | "Simple Emacs calculator." |
| d240a249 | 51 | :prefix "calculator" |
| 7def2f92 | 52 | :version "21.1" |
| d240a249 | 53 | :group 'tools |
| eba5b4dd | 54 | :group 'applications) |
| d240a249 GM |
55 | |
| 56 | (defcustom calculator-electric-mode nil | |
| 9201cc28 | 57 | "Run `calculator' electrically, in the echo area. |
| 25c269ef DL |
58 | Electric mode saves some place but changes the way you interact with the |
| 59 | calculator." | |
| d240a249 GM |
60 | :type 'boolean |
| 61 | :group 'calculator) | |
| 62 | ||
| 86f1e1ec | 63 | (defcustom calculator-use-menu t |
| 9201cc28 | 64 | "Make `calculator' create a menu. |
| 86f1e1ec GM |
65 | Note that this requires easymenu. Must be set before loading." |
| 66 | :type 'boolean | |
| 67 | :group 'calculator) | |
| 68 | ||
| d240a249 | 69 | (defcustom calculator-bind-escape nil |
| 9201cc28 | 70 | "If non-nil, set escape to exit the calculator." |
| d240a249 GM |
71 | :type 'boolean |
| 72 | :group 'calculator) | |
| 73 | ||
| 74 | (defcustom calculator-unary-style 'postfix | |
| 9201cc28 | 75 | "Value is either 'prefix or 'postfix. |
| d240a249 GM |
76 | This determines the default behavior of unary operators." |
| 77 | :type '(choice (const prefix) (const postfix)) | |
| 78 | :group 'calculator) | |
| 79 | ||
| 25c269ef | 80 | (defcustom calculator-prompt "Calc=%s> " |
| 9201cc28 | 81 | "The prompt used by the Emacs calculator. |
| c80e3b4a | 82 | It should contain a \"%s\" somewhere that will indicate the i/o radices; |
| bd9bb96e JB |
83 | this will be a two-character string as described in the documentation |
| 84 | for `calculator-mode'." | |
| d240a249 GM |
85 | :type 'string |
| 86 | :group 'calculator) | |
| 87 | ||
| 25c269ef | 88 | (defcustom calculator-number-digits 3 |
| 9201cc28 | 89 | "The calculator's number of digits used for standard display. |
| 25c269ef DL |
90 | Used by the `calculator-standard-display' function - it will use the |
| 91 | format string \"%.NC\" where this number is N and C is a character given | |
| 92 | at runtime." | |
| 2826ac81 | 93 | :type 'integer |
| d240a249 GM |
94 | :group 'calculator) |
| 95 | ||
| 761d3eb3 | 96 | (defcustom calculator-radix-grouping-mode t |
| 9201cc28 | 97 | "Use digit grouping in radix output mode. |
| 761d3eb3 RS |
98 | If this is set, chunks of `calculator-radix-grouping-digits' characters |
| 99 | will be separated by `calculator-radix-grouping-separator' when in radix | |
| f5307782 JB |
100 | output mode is active (determined by `calculator-output-radix')." |
| 101 | :type 'boolean | |
| 102 | :group 'calculator) | |
| 761d3eb3 RS |
103 | |
| 104 | (defcustom calculator-radix-grouping-digits 4 | |
| 9201cc28 | 105 | "The number of digits used for grouping display in radix modes. |
| f5307782 JB |
106 | See `calculator-radix-grouping-mode'." |
| 107 | :type 'integer | |
| 108 | :group 'calculator) | |
| 761d3eb3 RS |
109 | |
| 110 | (defcustom calculator-radix-grouping-separator "'" | |
| 9201cc28 | 111 | "The separator used in radix grouping display. |
| f5307782 JB |
112 | See `calculator-radix-grouping-mode'." |
| 113 | :type 'string | |
| 114 | :group 'calculator) | |
| 761d3eb3 | 115 | |
| 25c269ef | 116 | (defcustom calculator-remove-zeros t |
| 9201cc28 | 117 | "Non-nil value means delete all redundant zero decimal digits. |
| 25c269ef DL |
118 | If this value is not t, and not nil, redundant zeros are removed except |
| 119 | for one and if it is nil, nothing is removed. | |
| 120 | Used by the `calculator-remove-zeros' function." | |
| 121 | :type '(choice (const t) (const leave-decimal) (const nil)) | |
| d240a249 GM |
122 | :group 'calculator) |
| 123 | ||
| 25c269ef | 124 | (defcustom calculator-displayer '(std ?n) |
| 9201cc28 | 125 | "A displayer specification for numerical values. |
| 25c269ef DL |
126 | This is the displayer used to show all numbers in an expression. Result |
| 127 | values will be displayed according to the first element of | |
| 128 | `calculator-displayers'. | |
| 129 | ||
| 130 | The displayer is a symbol, a string or an expression. A symbol should | |
| 131 | be the name of a one-argument function, a string is used with a single | |
| 132 | argument and an expression will be evaluated with the variable `num' | |
| 133 | bound to whatever should be displayed. If it is a function symbol, it | |
| 134 | should be able to handle special symbol arguments, currently 'left and | |
| 135 | 'right which will be sent by special keys to modify display parameters | |
| 136 | associated with the displayer function (for example to change the number | |
| 137 | of digits displayed). | |
| 138 | ||
| 139 | An exception to the above is the case of the list (std C) where C is a | |
| 140 | character, in this case the `calculator-standard-displayer' function | |
| f5307782 JB |
141 | will be used with this character for a format string." |
| 142 | :group 'calculator) | |
| 25c269ef DL |
143 | |
| 144 | (defcustom calculator-displayers | |
| 2188f2d4 | 145 | '(((std ?n) "Standard display, decimal point or scientific") |
| 25c269ef DL |
146 | (calculator-eng-display "Eng display") |
| 147 | ((std ?f) "Standard display, decimal point") | |
| 2188f2d4 | 148 | ((std ?e) "Standard display, scientific") |
| 25c269ef | 149 | ("%S" "Emacs printer")) |
| 9201cc28 | 150 | "A list of displayers. |
| 25c269ef | 151 | Each element is a list of a displayer and a description string. The |
| 2188f2d4 | 152 | first element is the one which is currently used, this is for the display |
| 25c269ef DL |
153 | of result values not values in expressions. A displayer specification |
| 154 | is the same as the values that can be stored in `calculator-displayer'. | |
| 155 | ||
| 156 | `calculator-rotate-displayer' rotates this list." | |
| 157 | :type 'sexp | |
| d240a249 GM |
158 | :group 'calculator) |
| 159 | ||
| 25c269ef | 160 | (defcustom calculator-paste-decimals t |
| 9201cc28 | 161 | "If non-nil, convert pasted integers so they have a decimal point. |
| 25c269ef DL |
162 | This makes it possible to paste big integers since they will be read as |
| 163 | floats, otherwise the Emacs reader will fail on them." | |
| d240a249 GM |
164 | :type 'boolean |
| 165 | :group 'calculator) | |
| 166 | ||
| 4351784f | 167 | (defcustom calculator-copy-displayer nil |
| 9201cc28 | 168 | "If non-nil, this is any value that can be used for |
| 4351784f GM |
169 | `calculator-displayer', to format a string before copying it with |
| 170 | `calculator-copy'. If nil, then `calculator-displayer's normal value is | |
| f5307782 JB |
171 | used." |
| 172 | :type 'boolean | |
| 173 | :group 'calculator) | |
| 4351784f | 174 | |
| d240a249 | 175 | (defcustom calculator-2s-complement nil |
| 9201cc28 | 176 | "If non-nil, show negative numbers in 2s complement in radix modes. |
| d240a249 GM |
177 | Otherwise show as a negative number." |
| 178 | :type 'boolean | |
| 179 | :group 'calculator) | |
| 180 | ||
| 181 | (defcustom calculator-mode-hook nil | |
| 9201cc28 | 182 | "List of hook functions for `calculator-mode' to run. |
| 761d3eb3 RS |
183 | Note: if `calculator-electric-mode' is on, then this hook will get |
| 184 | activated in the minibuffer - in that case it should not do much more | |
| 185 | than local key settings and other effects that will change things | |
| 186 | outside the scope of calculator related code." | |
| d240a249 GM |
187 | :type 'hook |
| 188 | :group 'calculator) | |
| 189 | ||
| 190 | (defcustom calculator-user-registers nil | |
| 9201cc28 | 191 | "An association list of user-defined register bindings. |
| d240a249 GM |
192 | Each element in this list is a list of a character and a number that |
| 193 | will be stored in that character's register. | |
| 194 | ||
| 195 | For example, use this to define the golden ratio number: | |
| 25c269ef DL |
196 | (setq calculator-user-registers '((?g . 1.61803398875))) |
| 197 | before you load calculator." | |
| d240a249 | 198 | :type '(repeat (cons character number)) |
| 4f91a816 SM |
199 | :set (lambda (_ val) |
| 200 | (and (boundp 'calculator-registers) | |
| 201 | (setq calculator-registers | |
| 202 | (append val calculator-registers))) | |
| 203 | (setq calculator-user-registers val)) | |
| d240a249 GM |
204 | :group 'calculator) |
| 205 | ||
| 206 | (defcustom calculator-user-operators nil | |
| 9201cc28 | 207 | "A list of additional operators. |
| d240a249 GM |
208 | This is a list in the same format as specified in the documentation for |
| 209 | `calculator-operators', that you can use to bind additional calculator | |
| 210 | operators. It is probably not a good idea to modify this value with | |
| 211 | `customize' since it is too complex... | |
| 212 | ||
| 213 | Examples: | |
| 214 | ||
| 7def2f92 DL |
215 | * A very simple one, adding a postfix \"x-to-y\" conversion keys, using |
| 216 | t as a prefix key: | |
| d240a249 GM |
217 | |
| 218 | (setq calculator-user-operators | |
| 219 | '((\"tf\" cl-to-fr (+ 32 (/ (* X 9) 5)) 1) | |
| 220 | (\"tc\" fr-to-cl (/ (* (- X 32) 5) 9) 1) | |
| 221 | (\"tp\" kg-to-lb (/ X 0.453592) 1) | |
| 222 | (\"tk\" lb-to-kg (* X 0.453592) 1) | |
| 223 | (\"tF\" mt-to-ft (/ X 0.3048) 1) | |
| 224 | (\"tM\" ft-to-mt (* X 0.3048) 1))) | |
| 225 | ||
| 226 | * Using a function-like form is very simple, X for an argument (Y the | |
| 227 | second in case of a binary operator), TX is a truncated version of X | |
| 228 | and F does a recursive call, Here is a [very inefficient] Fibonacci | |
| 229 | number calculation: | |
| 230 | ||
| 231 | (add-to-list 'calculator-user-operators | |
| 232 | '(\"F\" fib (if (<= TX 1) | |
| 25c269ef DL |
233 | 1 |
| 234 | (+ (F (- TX 1)) (F (- TX 2)))) 0)) | |
| d240a249 GM |
235 | |
| 236 | Note that this will be either postfix or prefix, according to | |
| 237 | `calculator-unary-style'." | |
| 238 | :type '(repeat (list string symbol sexp integer integer)) | |
| 239 | :group 'calculator) | |
| 240 | ||
| cbb2dddb | 241 | ;;;===================================================================== |
| d240a249 GM |
242 | ;;; Code: |
| 243 | ||
| cbb2dddb | 244 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
245 | ;;; Variables |
| 246 | ||
| d240a249 | 247 | (defvar calculator-initial-operators |
| 86f1e1ec GM |
248 | '(;; "+"/"-" have keybindings of themselves, not calculator-ops |
| 249 | ("=" = identity 1 -1) | |
| 25c269ef DL |
250 | (nobind "+" + + 2 4) |
| 251 | (nobind "-" - - 2 4) | |
| 252 | (nobind "+" + + -1 9) | |
| 253 | (nobind "-" - - -1 9) | |
| 86f1e1ec GM |
254 | ("(" \( identity -1 -1) |
| 255 | (")" \) identity +1 10) | |
| d240a249 GM |
256 | ;; normal keys |
| 257 | ("|" or (logior TX TY) 2 2) | |
| 258 | ("#" xor (logxor TX TY) 2 2) | |
| 259 | ("&" and (logand TX TY) 2 3) | |
| 260 | ("*" * * 2 5) | |
| 261 | ("/" / / 2 5) | |
| 262 | ("\\" div (/ TX TY) 2 5) | |
| 263 | ("%" rem (% TX TY) 2 5) | |
| 264 | ("L" log log 2 6) | |
| 265 | ("S" sin (sin DX) x 6) | |
| 266 | ("C" cos (cos DX) x 6) | |
| 267 | ("T" tan (tan DX) x 6) | |
| 268 | ("IS" asin (D (asin X)) x 6) | |
| 269 | ("IC" acos (D (acos X)) x 6) | |
| 270 | ("IT" atan (D (atan X)) x 6) | |
| 271 | ("Q" sqrt sqrt x 7) | |
| f50347a9 | 272 | ("^" ^ calculator-expt 2 7) |
| d240a249 GM |
273 | ("!" ! calculator-fact x 7) |
| 274 | (";" 1/ (/ 1 X) 1 7) | |
| 275 | ("_" - - 1 8) | |
| 276 | ("~" ~ (lognot TX) x 8) | |
| 277 | (">" repR calculator-repR 1 8) | |
| 278 | ("<" repL calculator-repL 1 8) | |
| 279 | ("v" avg (/ (apply '+ L) (length L)) 0 8) | |
| 280 | ("l" tot (apply '+ L) 0 8) | |
| 281 | ) | |
| 282 | "A list of initial operators. | |
| d240a249 GM |
283 | This is a list in the same format as `calculator-operators'. Whenever |
| 284 | `calculator' starts, it looks at the value of this variable, and if it | |
| 285 | is not empty, its contents is prepended to `calculator-operators' and | |
| 286 | the appropriate key bindings are made. | |
| 287 | ||
| 288 | This variable is then reset to nil. Don't use this if you want to add | |
| 289 | user-defined operators, use `calculator-user-operators' instead.") | |
| 290 | ||
| 291 | (defvar calculator-operators nil | |
| 292 | "The calculator operators, each a list with: | |
| 293 | ||
| 294 | 1. The key that is bound to for this operation (usually a string); | |
| 295 | ||
| 296 | 2. The displayed symbol for this function; | |
| 297 | ||
| 298 | 3. The function symbol, or a form that uses the variables `X' and `Y', | |
| 299 | (if it is a binary operator), `TX' and `TY' (truncated integer | |
| 300 | versions), `DX' (converted to radians if degrees mode is on), `D' | |
| 301 | (function for converting radians to degrees if deg mode is on), `L' | |
| 302 | (list of saved values), `F' (function for recursive iteration calls) | |
| 303 | and evaluates to the function value - these variables are capital; | |
| 304 | ||
| 25c269ef DL |
305 | 4. The function's arity, optional, one of: 2 => binary, -1 => prefix |
| 306 | unary, +1 => postfix unary, 0 => a 0-arg operator func, non-number => | |
| 307 | postfix/prefix as determined by `calculator-unary-style' (the | |
| 308 | default); | |
| d240a249 | 309 | |
| 25c269ef DL |
310 | 5. The function's precedence - should be in the range of 1 (lowest) to |
| 311 | 9 (highest) (optional, defaults to 1); | |
| d240a249 GM |
312 | |
| 313 | It it possible have a unary prefix version of a binary operator if it | |
| 314 | comes later in this list. If the list begins with the symbol 'nobind, | |
| 315 | then no key binding will take place - this is only useful for predefined | |
| 316 | keys. | |
| 317 | ||
| 318 | Use `calculator-user-operators' to add operators to this list, see its | |
| 319 | documentation for an example.") | |
| 320 | ||
| 321 | (defvar calculator-stack nil | |
| 322 | "Stack contents - operations and operands.") | |
| 323 | ||
| 324 | (defvar calculator-curnum nil | |
| 325 | "Current number being entered (as a string).") | |
| 326 | ||
| 327 | (defvar calculator-stack-display nil | |
| 328 | "Cons of the stack and its string representation.") | |
| 329 | ||
| 330 | (defvar calculator-char-radix | |
| 331 | '((?D . nil) (?B . bin) (?O . oct) (?H . hex) (?X . hex)) | |
| 332 | "A table to convert input characters to corresponding radix symbols.") | |
| 333 | ||
| 334 | (defvar calculator-output-radix nil | |
| 335 | "The mode for display, one of: nil (decimal), 'bin, 'oct or 'hex.") | |
| 336 | ||
| 337 | (defvar calculator-input-radix nil | |
| 338 | "The mode for input, one of: nil (decimal), 'bin, 'oct or 'hex.") | |
| 339 | ||
| 340 | (defvar calculator-deg nil | |
| 341 | "Non-nil if trig functions operate on degrees instead of radians.") | |
| 342 | ||
| 343 | (defvar calculator-saved-list nil | |
| 344 | "A list of saved values collected.") | |
| 345 | ||
| 346 | (defvar calculator-saved-ptr 0 | |
| 347 | "The pointer to the current saved number.") | |
| 348 | ||
| 349 | (defvar calculator-add-saved nil | |
| 350 | "Bound to t when a value should be added to the saved-list.") | |
| 351 | ||
| 352 | (defvar calculator-display-fragile nil | |
| 353 | "When non-nil, we see something that the next digit should replace.") | |
| 354 | ||
| 355 | (defvar calculator-buffer nil | |
| 356 | "The current calculator buffer.") | |
| 357 | ||
| 25c269ef DL |
358 | (defvar calculator-eng-extra nil |
| 359 | "Internal value used by `calculator-eng-display'.") | |
| 360 | ||
| 361 | (defvar calculator-eng-tmp-show nil | |
| 362 | "Internal value used by `calculator-eng-display'.") | |
| 363 | ||
| d240a249 GM |
364 | (defvar calculator-last-opXY nil |
| 365 | "The last binary operation and its arguments. | |
| 366 | Used for repeating operations in calculator-repR/L.") | |
| 367 | ||
| 368 | (defvar calculator-registers ; use user-bindings first | |
| 9e0d4f9e SM |
369 | (append calculator-user-registers |
| 370 | (list (cons ?e float-e) (cons ?p float-pi))) | |
| d240a249 GM |
371 | "The association list of calculator register values.") |
| 372 | ||
| 373 | (defvar calculator-saved-global-map nil | |
| 374 | "Saved global key map.") | |
| 375 | ||
| 86f1e1ec | 376 | (defvar calculator-restart-other-mode nil |
| 25c269ef DL |
377 | "Used to hack restarting with the electric mode changed.") |
| 378 | ||
| cbb2dddb | 379 | ;;;--------------------------------------------------------------------- |
| 25c269ef | 380 | ;;; Key bindings |
| 86f1e1ec | 381 | |
| 4d789d84 | 382 | (defvar calculator-mode-map |
| 86f1e1ec | 383 | (let ((map (make-sparse-keymap))) |
| d240a249 GM |
384 | (suppress-keymap map t) |
| 385 | (define-key map "i" nil) | |
| 386 | (define-key map "o" nil) | |
| 86f1e1ec | 387 | (let ((p |
| 25c269ef DL |
388 | '((calculator-open-paren "[") |
| 389 | (calculator-close-paren "]") | |
| 390 | (calculator-op-or-exp "+" "-" [kp-add] [kp-subtract]) | |
| 391 | (calculator-digit "0" "1" "2" "3" "4" "5" "6" "7" "8" | |
| 392 | "9" "a" "b" "c" "d" "f" | |
| 393 | [kp-0] [kp-1] [kp-2] [kp-3] [kp-4] | |
| 394 | [kp-5] [kp-6] [kp-7] [kp-8] [kp-9]) | |
| 395 | (calculator-op [kp-divide] [kp-multiply]) | |
| 396 | (calculator-decimal "." [kp-decimal]) | |
| 397 | (calculator-exp "e") | |
| 86f1e1ec GM |
398 | (calculator-dec/deg-mode "D") |
| 399 | (calculator-set-register "s") | |
| 400 | (calculator-get-register "g") | |
| 401 | (calculator-radix-mode "H" "X" "O" "B") | |
| 402 | (calculator-radix-input-mode "id" "ih" "ix" "io" "ib" | |
| 403 | "iD" "iH" "iX" "iO" "iB") | |
| 404 | (calculator-radix-output-mode "od" "oh" "ox" "oo" "ob" | |
| 405 | "oD" "oH" "oX" "oO" "oB") | |
| 25c269ef DL |
406 | (calculator-rotate-displayer "'") |
| 407 | (calculator-rotate-displayer-back "\"") | |
| 761d3eb3 | 408 | (calculator-displayer-prev "{") |
| 4351784f | 409 | (calculator-displayer-next "}") |
| 86f1e1ec GM |
410 | (calculator-saved-up [up] [?\C-p]) |
| 411 | (calculator-saved-down [down] [?\C-n]) | |
| 412 | (calculator-quit "q" [?\C-g]) | |
| 25c269ef DL |
413 | (calculator-enter [enter] [linefeed] [kp-enter] |
| 414 | [return] [?\r] [?\n]) | |
| 86f1e1ec GM |
415 | (calculator-save-on-list " " [space]) |
| 416 | (calculator-clear-saved [?\C-c] [(control delete)]) | |
| 417 | (calculator-save-and-quit [(control return)] | |
| 418 | [(control kp-enter)]) | |
| cbb2dddb | 419 | (calculator-paste [insert] [(shift insert)] |
| 761d3eb3 | 420 | [paste] [mouse-2] [?\C-y]) |
| 86f1e1ec GM |
421 | (calculator-clear [delete] [?\C-?] [?\C-d]) |
| 422 | (calculator-help [?h] [??] [f1] [help]) | |
| 761d3eb3 | 423 | (calculator-copy [(control insert)] [copy]) |
| 86f1e1ec GM |
424 | (calculator-backspace [backspace]) |
| 425 | ))) | |
| d240a249 | 426 | (while p |
| 86f1e1ec GM |
427 | ;; reverse the keys so first defs come last - makes the more |
| 428 | ;; sensible bindings visible in the menu | |
| 429 | (let ((func (car (car p))) (keys (reverse (cdr (car p))))) | |
| 430 | (while keys | |
| 431 | (define-key map (car keys) func) | |
| 432 | (setq keys (cdr keys)))) | |
| d240a249 GM |
433 | (setq p (cdr p)))) |
| 434 | (if calculator-bind-escape | |
| 435 | (progn (define-key map [?\e] 'calculator-quit) | |
| 436 | (define-key map [escape] 'calculator-quit)) | |
| 437 | (define-key map [?\e ?\e ?\e] 'calculator-quit)) | |
| 438 | ;; make C-h work in text-mode | |
| 439 | (or window-system (define-key map [?\C-h] 'calculator-backspace)) | |
| 86f1e1ec GM |
440 | ;; set up a menu |
| 441 | (if (and calculator-use-menu (not (boundp 'calculator-menu))) | |
| 442 | (let ((radix-selectors | |
| 443 | (mapcar (lambda (x) | |
| 444 | `([,(nth 0 x) | |
| 445 | (calculator-radix-mode ,(nth 2 x)) | |
| 446 | :style radio | |
| 447 | :keys ,(nth 2 x) | |
| 448 | :selected | |
| 449 | (and | |
| 450 | (eq calculator-input-radix ',(nth 1 x)) | |
| 451 | (eq calculator-output-radix ',(nth 1 x)))] | |
| 452 | [,(concat (nth 0 x) " Input") | |
| 453 | (calculator-radix-input-mode ,(nth 2 x)) | |
| 454 | :keys ,(concat "i" (downcase (nth 2 x))) | |
| 455 | :style radio | |
| 456 | :selected | |
| 457 | (eq calculator-input-radix ',(nth 1 x))] | |
| 458 | [,(concat (nth 0 x) " Output") | |
| 459 | (calculator-radix-output-mode ,(nth 2 x)) | |
| 460 | :keys ,(concat "o" (downcase (nth 2 x))) | |
| 461 | :style radio | |
| 462 | :selected | |
| 463 | (eq calculator-output-radix ',(nth 1 x))])) | |
| 464 | '(("Decimal" nil "D") | |
| 465 | ("Binary" bin "B") | |
| 466 | ("Octal" oct "O") | |
| 467 | ("Hexadecimal" hex "H")))) | |
| 4d789d84 SM |
468 | (op (lambda (name key) |
| 469 | `[,name (calculator-op ,key) :keys ,key]))) | |
| 86f1e1ec | 470 | (easy-menu-define |
| 4d789d84 SM |
471 | calculator-menu map "Calculator menu." |
| 472 | `("Calculator" | |
| 473 | ["Help" | |
| 474 | (let ((last-command 'calculator-help)) (calculator-help)) | |
| 475 | :keys "?"] | |
| 476 | "---" | |
| 477 | ["Copy" calculator-copy] | |
| 478 | ["Paste" calculator-paste] | |
| 86f1e1ec | 479 | "---" |
| 4d789d84 SM |
480 | ["Electric mode" |
| 481 | (progn (calculator-quit) | |
| 482 | (setq calculator-restart-other-mode t) | |
| 4f91a816 | 483 | (run-with-timer 0.1 nil (lambda () (message nil))) |
| 4d789d84 SM |
484 | ;; the message from the menu will be visible, |
| 485 | ;; couldn't make it go away... | |
| 486 | (calculator)) | |
| 487 | :active (not calculator-electric-mode)] | |
| 488 | ["Normal mode" | |
| 489 | (progn (setq calculator-restart-other-mode t) | |
| 490 | (calculator-quit)) | |
| 491 | :active calculator-electric-mode] | |
| 86f1e1ec | 492 | "---" |
| 4d789d84 SM |
493 | ("Functions" |
| 494 | ,(funcall op "Repeat-right" ">") | |
| 495 | ,(funcall op "Repeat-left" "<") | |
| 496 | "------General------" | |
| 497 | ,(funcall op "Reciprocal" ";") | |
| 498 | ,(funcall op "Log" "L") | |
| 499 | ,(funcall op "Square-root" "Q") | |
| 500 | ,(funcall op "Factorial" "!") | |
| 501 | "------Trigonometric------" | |
| 502 | ,(funcall op "Sinus" "S") | |
| 503 | ,(funcall op "Cosine" "C") | |
| 504 | ,(funcall op "Tangent" "T") | |
| 505 | ,(funcall op "Inv-Sinus" "IS") | |
| 506 | ,(funcall op "Inv-Cosine" "IC") | |
| 507 | ,(funcall op "Inv-Tangent" "IT") | |
| 508 | "------Bitwise------" | |
| 509 | ,(funcall op "Or" "|") | |
| 510 | ,(funcall op "Xor" "#") | |
| 511 | ,(funcall op "And" "&") | |
| 512 | ,(funcall op "Not" "~")) | |
| 513 | ("Saved List" | |
| 514 | ["Eval+Save" calculator-save-on-list] | |
| 515 | ["Prev number" calculator-saved-up] | |
| 516 | ["Next number" calculator-saved-down] | |
| 517 | ["Delete current" calculator-clear | |
| 518 | :active (and calculator-display-fragile | |
| 519 | calculator-saved-list | |
| 520 | (= (car calculator-stack) | |
| 521 | (nth calculator-saved-ptr | |
| 522 | calculator-saved-list)))] | |
| 523 | ["Delete all" calculator-clear-saved] | |
| 86f1e1ec | 524 | "---" |
| 4d789d84 SM |
525 | ,(funcall op "List-total" "l") |
| 526 | ,(funcall op "List-average" "v")) | |
| 527 | ("Registers" | |
| 528 | ["Get register" calculator-get-register] | |
| 529 | ["Set register" calculator-set-register]) | |
| 530 | ("Modes" | |
| 531 | ["Radians" | |
| 532 | (progn | |
| 533 | (and (or calculator-input-radix calculator-output-radix) | |
| 534 | (calculator-radix-mode "D")) | |
| 535 | (and calculator-deg (calculator-dec/deg-mode))) | |
| 536 | :keys "D" | |
| 537 | :style radio | |
| 538 | :selected (not (or calculator-input-radix | |
| 539 | calculator-output-radix | |
| 540 | calculator-deg))] | |
| 541 | ["Degrees" | |
| 542 | (progn | |
| 543 | (and (or calculator-input-radix calculator-output-radix) | |
| 544 | (calculator-radix-mode "D")) | |
| 545 | (or calculator-deg (calculator-dec/deg-mode))) | |
| 546 | :keys "D" | |
| 547 | :style radio | |
| 548 | :selected (and calculator-deg | |
| 549 | (not (or calculator-input-radix | |
| 550 | calculator-output-radix)))] | |
| 551 | "---" | |
| 552 | ,@(mapcar 'car radix-selectors) | |
| 553 | ("Separate I/O" | |
| 554 | ,@(mapcar (lambda (x) (nth 1 x)) radix-selectors) | |
| 555 | "---" | |
| 556 | ,@(mapcar (lambda (x) (nth 2 x)) radix-selectors))) | |
| 557 | ("Decimal Display" | |
| 558 | ,@(mapcar (lambda (d) | |
| 559 | (vector (cadr d) | |
| 560 | ;; Note: inserts actual object here | |
| 561 | `(calculator-rotate-displayer ',d))) | |
| 562 | calculator-displayers) | |
| 563 | "---" | |
| 564 | ["Change Prev Display" calculator-displayer-prev] | |
| 565 | ["Change Next Display" calculator-displayer-next]) | |
| 25c269ef | 566 | "---" |
| 4d789d84 SM |
567 | ["Copy+Quit" calculator-save-and-quit] |
| 568 | ["Quit" calculator-quit])))) | |
| 569 | map) | |
| 570 | "The calculator key map.") | |
| d240a249 | 571 | |
| cbb2dddb | 572 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
573 | ;;; Startup and mode stuff |
| 574 | ||
| 4d789d84 | 575 | (define-derived-mode calculator-mode fundamental-mode "Calculator" |
| 25c269ef DL |
576 | ;; this help is also used as the major help screen |
| 577 | "A [not so] simple calculator for Emacs. | |
| d240a249 GM |
578 | |
| 579 | This calculator is used in the same way as other popular calculators | |
| 580 | like xcalc or calc.exe - but using an Emacs interface. | |
| 581 | ||
| 582 | Expressions are entered using normal infix notation, parens are used as | |
| 583 | normal. Unary functions are usually postfix, but some depends on the | |
| 584 | value of `calculator-unary-style' (if the style for an operator below is | |
| 585 | specified, then it is fixed, otherwise it depends on this variable). | |
| 586 | `+' and `-' can be used as either binary operators or prefix unary | |
| 587 | operators. Numbers can be entered with exponential notation using `e', | |
| 588 | except when using a non-decimal radix mode for input (in this case `e' | |
| f50347a9 JB |
589 | will be the hexadecimal digit). If the result of a calculation is too |
| 590 | large (out of range for Emacs), the value of \"inf\" is returned. | |
| d240a249 GM |
591 | |
| 592 | Here are the editing keys: | |
| 593 | * `RET' `=' evaluate the current expression | |
| 594 | * `C-insert' copy the whole current expression to the `kill-ring' | |
| 86f1e1ec | 595 | * `C-return' evaluate, save result the `kill-ring' and exit |
| d240a249 GM |
596 | * `insert' paste a number if the one was copied (normally) |
| 597 | * `delete' `C-d' clear last argument or whole expression (hit twice) | |
| 598 | * `backspace' delete a digit or a previous expression element | |
| 599 | * `h' `?' pop-up a quick reference help | |
| 600 | * `ESC' `q' exit (`ESC' can be used if `calculator-bind-escape' is | |
| 601 | non-nil, otherwise use three consecutive `ESC's) | |
| 602 | ||
| 603 | These operators are pre-defined: | |
| 604 | * `+' `-' `*' `/' the common binary operators | |
| 605 | * `\\' `%' integer division and reminder | |
| 606 | * `_' `;' postfix unary negation and reciprocal | |
| 607 | * `^' `L' binary operators for x^y and log(x) in base y | |
| 608 | * `Q' `!' unary square root and factorial | |
| 609 | * `S' `C' `T' unary trigonometric operators - sin, cos and tan | |
| 610 | * `|' `#' `&' `~' bitwise operators - or, xor, and, not | |
| 611 | ||
| 612 | The trigonometric functions can be inverted if prefixed with an `I', see | |
| 613 | below for the way to use degrees instead of the default radians. | |
| 614 | ||
| 615 | Two special postfix unary operators are `>' and `<': whenever a binary | |
| 616 | operator is performed, it is remembered along with its arguments; then | |
| 617 | `>' (`<') will apply the same operator with the same right (left) | |
| 618 | argument. | |
| 619 | ||
| 620 | hex/oct/bin modes can be set for input and for display separately. | |
| 621 | Another toggle-able mode is for using degrees instead of radians for | |
| 622 | trigonometric functions. | |
| 623 | The keys to switch modes are (`X' is shortcut for `H'): | |
| 624 | * `D' switch to all-decimal mode, or toggle degrees/radians | |
| 625 | * `B' `O' `H' `X' binary/octal/hexadecimal modes for input & display | |
| 626 | * `i' `o' followed by one of `D' `B' `O' `H' `X' (case | |
| 627 | insensitive) sets only the input or display radix mode | |
| 628 | The prompt indicates the current modes: | |
| 629 | * \"D=\": degrees mode; | |
| 630 | * \"?=\": (? is B/O/H) this is the radix for both input and output; | |
| 631 | * \"=?\": (? is B/O/H) the display radix (when input is decimal); | |
| 632 | * \"??\": (? is D/B/O/H) 1st char for input radix, 2nd for display. | |
| 633 | ||
| 761d3eb3 RS |
634 | Also, the quote key can be used to switch display modes for decimal |
| 635 | numbers (double-quote rotates back), and the two brace characters | |
| 636 | \(\"{\" and \"}\" change display parameters that these displayers use (if | |
| 637 | they handle such). If output is using any radix mode, then these keys | |
| 638 | toggle digit grouping mode and the chunk size. | |
| 25c269ef | 639 | |
| d240a249 GM |
640 | Values can be saved for future reference in either a list of saved |
| 641 | values, or in registers. | |
| 642 | ||
| 643 | The list of saved values is useful for statistics operations on some | |
| 644 | collected data. It is possible to navigate in this list, and if the | |
| 645 | value shown is the current one on the list, an indication is displayed | |
| 646 | as \"[N]\" if this is the last number and there are N numbers, or | |
| 647 | \"[M/N]\" if the M-th value is shown. | |
| 648 | * `SPC' evaluate the current value as usual, but also adds | |
| 649 | the result to the list of saved values | |
| 650 | * `l' `v' computes total / average of saved values | |
| 651 | * `up' `C-p' browse to the previous value in the list | |
| 652 | * `down' `C-n' browse to the next value in the list | |
| 653 | * `delete' `C-d' remove current value from the list (if it is on it) | |
| 654 | * `C-delete' `C-c' delete the whole list | |
| 655 | ||
| 656 | Registers are variable-like place-holders for values: | |
| 657 | * `s' followed by a character attach the current value to that character | |
| 658 | * `g' followed by a character fetches the attached value | |
| 659 | ||
| 660 | There are many variables that can be used to customize the calculator. | |
| 661 | Some interesting customization variables are: | |
| 662 | * `calculator-electric-mode' use only the echo-area electrically. | |
| 663 | * `calculator-unary-style' set most unary ops to pre/postfix style. | |
| 664 | * `calculator-user-registers' to define user-preset registers. | |
| 665 | * `calculator-user-operators' to add user-defined operators. | |
| 666 | See the documentation for these variables, and \"calculator.el\" for | |
| 667 | more information. | |
| 668 | ||
| 4d789d84 | 669 | \\{calculator-mode-map}") |
| d240a249 | 670 | |
| 25c269ef DL |
671 | (eval-when-compile (require 'electric) (require 'ehelp)) |
| 672 | ||
| d240a249 GM |
673 | ;;;###autoload |
| 674 | (defun calculator () | |
| 25c269ef | 675 | "Run the Emacs calculator. |
| d240a249 GM |
676 | See the documentation for `calculator-mode' for more information." |
| 677 | (interactive) | |
| 86f1e1ec GM |
678 | (if calculator-restart-other-mode |
| 679 | (setq calculator-electric-mode (not calculator-electric-mode))) | |
| d240a249 GM |
680 | (if calculator-initial-operators |
| 681 | (progn (calculator-add-operators calculator-initial-operators) | |
| 682 | (setq calculator-initial-operators nil) | |
| 683 | ;; don't change this since it is a customization variable, | |
| 25c269ef | 684 | ;; its set function will add any new operators |
| d240a249 | 685 | (calculator-add-operators calculator-user-operators))) |
| cc234da9 | 686 | (setq calculator-buffer (get-buffer-create "*calculator*")) |
| d240a249 GM |
687 | (if calculator-electric-mode |
| 688 | (save-window-excursion | |
| 86f1e1ec | 689 | (progn (require 'electric) (message nil)) ; hide load message |
| d240a249 GM |
690 | (let (old-g-map old-l-map (echo-keystrokes 0) |
| 691 | (garbage-collection-messages nil)) ; no gc msg when electric | |
| cc234da9 | 692 | (set-window-buffer (minibuffer-window) calculator-buffer) |
| d240a249 GM |
693 | (select-window (minibuffer-window)) |
| 694 | (calculator-reset) | |
| 695 | (calculator-update-display) | |
| 696 | (setq old-l-map (current-local-map)) | |
| 697 | (setq old-g-map (current-global-map)) | |
| 698 | (setq calculator-saved-global-map (current-global-map)) | |
| 86f1e1ec | 699 | (use-local-map nil) |
| d240a249 | 700 | (use-global-map calculator-mode-map) |
| 761d3eb3 | 701 | (run-hooks 'calculator-mode-hook) |
| d240a249 GM |
702 | (unwind-protect |
| 703 | (catch 'calculator-done | |
| 704 | (Electric-command-loop | |
| 705 | 'calculator-done | |
| 706 | ;; can't use 'noprompt, bug in electric.el | |
| 4f91a816 | 707 | (lambda () 'noprompt) |
| d240a249 | 708 | nil |
| 86f1e1ec | 709 | (lambda (x y) (calculator-update-display)))) |
| d240a249 GM |
710 | (and calculator-buffer |
| 711 | (catch 'calculator-done (calculator-quit))) | |
| 712 | (use-local-map old-l-map) | |
| 713 | (use-global-map old-g-map)))) | |
| 86f1e1ec | 714 | (progn |
| 4351784f GM |
715 | (cond |
| 716 | ((not (get-buffer-window calculator-buffer)) | |
| a4e32226 | 717 | (let ((window-min-height 2)) |
| 37269466 CY |
718 | ;; maybe leave two lines for our window because of the |
| 719 | ;; normal `raised' mode line | |
| 4351784f | 720 | (select-window |
| 2d197ffb | 721 | (split-window-below |
| 37269466 CY |
722 | ;; If the mode line might interfere with the calculator |
| 723 | ;; buffer, use 3 lines instead. | |
| 4351784f | 724 | (if (and (fboundp 'face-attr-construct) |
| 0098d2be | 725 | (let* ((dh (plist-get (face-attr-construct 'default) :height)) |
| 37269466 | 726 | (mf (face-attr-construct 'mode-line)) |
| 0098d2be | 727 | (mh (plist-get mf :height))) |
| 37269466 | 728 | ;; If the mode line is shorter than the default, |
| bd9bb96e | 729 | ;; stick with 2 lines. (It may be necessary to |
| 0098d2be JB |
730 | ;; check how much shorter.) |
| 731 | (and | |
| 732 | (not | |
| 733 | (or (and (integerp dh) | |
| 734 | (integerp mh) | |
| 735 | (< mh dh)) | |
| 736 | (and (numberp mh) | |
| 737 | (not (integerp mh)) | |
| 738 | (< mh 1)))) | |
| 739 | (or | |
| 37269466 | 740 | ;; If the mode line is taller than the default, |
| 0098d2be JB |
741 | ;; use 3 lines. |
| 742 | (and (integerp dh) | |
| 743 | (integerp mh) | |
| 744 | (> mh dh)) | |
| 745 | (and (numberp mh) | |
| 746 | (not (integerp mh)) | |
| 747 | (> mh 1)) | |
| 37269466 | 748 | ;; If the mode line has a box with non-negative line-width, |
| 0098d2be JB |
749 | ;; use 3 lines. |
| 750 | (let* ((bx (plist-get mf :box)) | |
| 751 | (lh (plist-get bx :line-width))) | |
| 752 | (and bx | |
| bd9bb96e | 753 | (or |
| 0098d2be JB |
754 | (not lh) |
| 755 | (> lh 0)))) | |
| 37269466 CY |
756 | ;; If the mode line has an overline, use 3 lines. |
| 757 | (plist-get (face-attr-construct 'mode-line) :overline))))) | |
| 4351784f GM |
758 | -3 -2))) |
| 759 | (switch-to-buffer calculator-buffer))) | |
| 760 | ((not (eq (current-buffer) calculator-buffer)) | |
| 761 | (select-window (get-buffer-window calculator-buffer)))) | |
| 86f1e1ec GM |
762 | (calculator-mode) |
| 763 | (setq buffer-read-only t) | |
| 764 | (calculator-reset) | |
| 765 | (message "Hit `?' For a quick help screen."))) | |
| 766 | (if (and calculator-restart-other-mode calculator-electric-mode) | |
| 767 | (calculator))) | |
| d240a249 | 768 | |
| 761d3eb3 RS |
769 | (defun calculator-message (string &rest arguments) |
| 770 | "Same as `message', but special handle of electric mode." | |
| 771 | (apply 'message string arguments) | |
| 772 | (if calculator-electric-mode | |
| 773 | (progn (sit-for 1) (message nil)))) | |
| 774 | ||
| cbb2dddb | 775 | ;;;--------------------------------------------------------------------- |
| 2188f2d4 | 776 | ;;; Operators |
| 25c269ef | 777 | |
| d240a249 GM |
778 | (defun calculator-op-arity (op) |
| 779 | "Return OP's arity, 2, +1 or -1." | |
| 780 | (let ((arity (or (nth 3 op) 'x))) | |
| 781 | (if (numberp arity) | |
| 782 | arity | |
| 783 | (if (eq calculator-unary-style 'postfix) +1 -1)))) | |
| 784 | ||
| 785 | (defun calculator-op-prec (op) | |
| 786 | "Return OP's precedence for reducing when inserting into the stack. | |
| 787 | Defaults to 1." | |
| 788 | (or (nth 4 op) 1)) | |
| 789 | ||
| 790 | (defun calculator-add-operators (more-ops) | |
| 791 | "This function handles operator addition. | |
| 792 | Adds MORE-OPS to `calculator-operator', called initially to handle | |
| 793 | `calculator-initial-operators' and `calculator-user-operators'." | |
| 794 | (let ((added-ops nil)) | |
| 795 | (while more-ops | |
| 796 | (or (eq (car (car more-ops)) 'nobind) | |
| 797 | (let ((i -1) (key (car (car more-ops)))) | |
| 798 | ;; make sure the key is undefined, so it's easy to define | |
| 799 | ;; prefix keys | |
| 800 | (while (< (setq i (1+ i)) (length key)) | |
| 801 | (or (keymapp | |
| 802 | (lookup-key calculator-mode-map | |
| 803 | (substring key 0 (1+ i)))) | |
| 804 | (progn | |
| 805 | (define-key | |
| 806 | calculator-mode-map (substring key 0 (1+ i)) nil) | |
| 807 | (setq i (length key))))) | |
| 808 | (define-key calculator-mode-map key 'calculator-op))) | |
| 809 | (setq added-ops (cons (if (eq (car (car more-ops)) 'nobind) | |
| 810 | (cdr (car more-ops)) | |
| 811 | (car more-ops)) | |
| 812 | added-ops)) | |
| 813 | (setq more-ops (cdr more-ops))) | |
| 814 | ;; added-ops come first, but in correct order | |
| 815 | (setq calculator-operators | |
| 816 | (append (nreverse added-ops) calculator-operators)))) | |
| 817 | ||
| cbb2dddb | 818 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
819 | ;;; Display stuff |
| 820 | ||
| d240a249 GM |
821 | (defun calculator-reset () |
| 822 | "Reset calculator variables." | |
| 86f1e1ec GM |
823 | (or calculator-restart-other-mode |
| 824 | (setq calculator-stack nil | |
| 825 | calculator-curnum nil | |
| 826 | calculator-stack-display nil | |
| 827 | calculator-display-fragile nil)) | |
| 828 | (setq calculator-restart-other-mode nil) | |
| d240a249 GM |
829 | (calculator-update-display)) |
| 830 | ||
| 831 | (defun calculator-get-prompt () | |
| 832 | "Return a string to display. | |
| 833 | The string is set not to exceed the screen width." | |
| 834 | (let* ((calculator-prompt | |
| 835 | (format calculator-prompt | |
| 836 | (cond | |
| 837 | ((or calculator-output-radix calculator-input-radix) | |
| 838 | (if (eq calculator-output-radix | |
| 839 | calculator-input-radix) | |
| 840 | (concat | |
| 841 | (char-to-string | |
| 842 | (car (rassq calculator-output-radix | |
| 843 | calculator-char-radix))) | |
| 844 | "=") | |
| 845 | (concat | |
| 846 | (if calculator-input-radix | |
| 847 | (char-to-string | |
| 848 | (car (rassq calculator-input-radix | |
| 849 | calculator-char-radix))) | |
| 850 | "=") | |
| 851 | (char-to-string | |
| 852 | (car (rassq calculator-output-radix | |
| 853 | calculator-char-radix)))))) | |
| 854 | (calculator-deg "D=") | |
| 855 | (t "==")))) | |
| 856 | (prompt | |
| 857 | (concat calculator-prompt | |
| 858 | (cdr calculator-stack-display) | |
| 859 | (cond (calculator-curnum | |
| 860 | ;; number being typed | |
| 861 | (concat calculator-curnum "_")) | |
| 862 | ((and (= 1 (length calculator-stack)) | |
| 863 | calculator-display-fragile) | |
| 864 | ;; only the result is shown, next number will | |
| 865 | ;; restart | |
| 866 | nil) | |
| 867 | (t | |
| 868 | ;; waiting for a number or an operator | |
| 869 | "?")))) | |
| 870 | (trim (- (length prompt) (1- (window-width))))) | |
| 871 | (if (<= trim 0) | |
| 872 | prompt | |
| 873 | (concat calculator-prompt | |
| 874 | (substring prompt (+ trim (length calculator-prompt))))))) | |
| 875 | ||
| 761d3eb3 RS |
876 | (defun calculator-string-to-number (str) |
| 877 | "Convert the given STR to a number, according to the value of | |
| 878 | `calculator-input-radix'." | |
| d240a249 GM |
879 | (if calculator-input-radix |
| 880 | (let ((radix | |
| 881 | (cdr (assq calculator-input-radix | |
| 882 | '((bin . 2) (oct . 8) (hex . 16))))) | |
| 761d3eb3 RS |
883 | (i -1) (value 0) (new-value 0)) |
| 884 | ;; assume mostly valid input (e.g., characters in range) | |
| 885 | (while (< (setq i (1+ i)) (length str)) | |
| 886 | (setq new-value | |
| 887 | (let* ((ch (upcase (aref str i))) | |
| 888 | (n (cond ((< ch ?0) nil) | |
| 889 | ((<= ch ?9) (- ch ?0)) | |
| 890 | ((< ch ?A) nil) | |
| 891 | ((<= ch ?Z) (- ch (- ?A 10))) | |
| 892 | (t nil)))) | |
| 893 | (if (and n (<= 0 n) (< n radix)) | |
| 894 | (+ n (* radix value)) | |
| 895 | (progn | |
| 896 | (calculator-message | |
| 897 | "Warning: Ignoring bad input character `%c'." ch) | |
| 898 | (sit-for 1) | |
| 899 | value)))) | |
| 900 | (if (if (< new-value 0) (> value 0) (< value 0)) | |
| 901 | (calculator-message "Warning: Overflow in input.")) | |
| 902 | (setq value new-value)) | |
| d240a249 | 903 | value) |
| 761d3eb3 RS |
904 | (car (read-from-string |
| 905 | (cond ((equal "." str) "0.0") | |
| 906 | ((string-match "[eE][+-]?$" str) (concat str "0")) | |
| 907 | ((string-match "\\.[0-9]\\|[eE]" str) str) | |
| 908 | ((string-match "\\." str) | |
| 909 | ;; do this because Emacs reads "23." as an integer | |
| 910 | (concat str "0")) | |
| 911 | ((stringp str) (concat str ".0")) | |
| 912 | (t "0.0")))))) | |
| 913 | ||
| 914 | (defun calculator-curnum-value () | |
| 915 | "Get the numeric value of the displayed number string as a float." | |
| 916 | (calculator-string-to-number calculator-curnum)) | |
| d240a249 | 917 | |
| 25c269ef DL |
918 | (defun calculator-rotate-displayer (&optional new-disp) |
| 919 | "Switch to the next displayer on the `calculator-displayers' list. | |
| 920 | Can be called with an optional argument NEW-DISP to force rotation to | |
| 761d3eb3 RS |
921 | that argument. |
| 922 | If radix output mode is active, toggle digit grouping." | |
| 25c269ef | 923 | (interactive) |
| 761d3eb3 RS |
924 | (cond |
| 925 | (calculator-output-radix | |
| 926 | (setq calculator-radix-grouping-mode | |
| 927 | (not calculator-radix-grouping-mode)) | |
| 928 | (calculator-message | |
| 929 | "Digit grouping mode %s." | |
| 930 | (if calculator-radix-grouping-mode "ON" "OFF"))) | |
| 931 | (t | |
| 932 | (setq calculator-displayers | |
| 933 | (if (and new-disp (memq new-disp calculator-displayers)) | |
| 934 | (let ((tmp nil)) | |
| 935 | (while (not (eq (car calculator-displayers) new-disp)) | |
| 936 | (setq tmp (cons (car calculator-displayers) tmp)) | |
| 937 | (setq calculator-displayers | |
| 938 | (cdr calculator-displayers))) | |
| 939 | (setq calculator-displayers | |
| 940 | (nconc calculator-displayers (nreverse tmp)))) | |
| 941 | (nconc (cdr calculator-displayers) | |
| 942 | (list (car calculator-displayers))))) | |
| 943 | (calculator-message | |
| 944 | "Using %s." (cadr (car calculator-displayers))))) | |
| 25c269ef DL |
945 | (calculator-enter)) |
| 946 | ||
| 947 | (defun calculator-rotate-displayer-back () | |
| 761d3eb3 RS |
948 | "Like `calculator-rotate-displayer', but rotates modes back. |
| 949 | If radix output mode is active, toggle digit grouping." | |
| 25c269ef DL |
950 | (interactive) |
| 951 | (calculator-rotate-displayer (car (last calculator-displayers)))) | |
| 952 | ||
| 4351784f | 953 | (defun calculator-displayer-prev () |
| 25c269ef DL |
954 | "Send the current displayer function a 'left argument. |
| 955 | This is used to modify display arguments (if the current displayer | |
| 761d3eb3 RS |
956 | function supports this). |
| 957 | If radix output mode is active, increase the grouping size." | |
| 25c269ef | 958 | (interactive) |
| 761d3eb3 RS |
959 | (if calculator-output-radix |
| 960 | (progn (setq calculator-radix-grouping-digits | |
| 961 | (1+ calculator-radix-grouping-digits)) | |
| 962 | (calculator-enter)) | |
| 963 | (and (car calculator-displayers) | |
| 964 | (let ((disp (caar calculator-displayers))) | |
| 965 | (cond | |
| 966 | ((symbolp disp) (funcall disp 'left)) | |
| 967 | ((and (consp disp) (eq 'std (car disp))) | |
| 968 | (calculator-standard-displayer 'left (cadr disp)))))))) | |
| 25c269ef | 969 | |
| 4351784f | 970 | (defun calculator-displayer-next () |
| 25c269ef DL |
971 | "Send the current displayer function a 'right argument. |
| 972 | This is used to modify display arguments (if the current displayer | |
| 761d3eb3 RS |
973 | function supports this). |
| 974 | If radix output mode is active, decrease the grouping size." | |
| 25c269ef | 975 | (interactive) |
| 761d3eb3 RS |
976 | (if calculator-output-radix |
| 977 | (progn (setq calculator-radix-grouping-digits | |
| 978 | (max 2 (1- calculator-radix-grouping-digits))) | |
| 979 | (calculator-enter)) | |
| 980 | (and (car calculator-displayers) | |
| 981 | (let ((disp (caar calculator-displayers))) | |
| 982 | (cond | |
| 983 | ((symbolp disp) (funcall disp 'right)) | |
| 984 | ((and (consp disp) (eq 'std (car disp))) | |
| 985 | (calculator-standard-displayer 'right (cadr disp)))))))) | |
| 25c269ef DL |
986 | |
| 987 | (defun calculator-remove-zeros (numstr) | |
| a1ff7705 JB |
988 | "Get a number string NUMSTR and remove unnecessary zeros. |
| 989 | The behavior of this function is controlled by | |
| 25c269ef DL |
990 | `calculator-remove-zeros'." |
| 991 | (cond ((and (eq calculator-remove-zeros t) | |
| 992 | (string-match "\\.0+\\([eE][+-]?[0-9]*\\)?$" numstr)) | |
| 993 | ;; remove all redundant zeros leaving an integer | |
| 994 | (if (match-beginning 1) | |
| 995 | (concat (substring numstr 0 (match-beginning 0)) | |
| 996 | (match-string 1 numstr)) | |
| 997 | (substring numstr 0 (match-beginning 0)))) | |
| 998 | ((and calculator-remove-zeros | |
| 999 | (string-match | |
| 1000 | "\\..\\([0-9]*[1-9]\\)?\\(0+\\)\\([eE][+-]?[0-9]*\\)?$" | |
| 1001 | numstr)) | |
| 1002 | ;; remove zeros, except for first after the "." | |
| 1003 | (if (match-beginning 3) | |
| 1004 | (concat (substring numstr 0 (match-beginning 2)) | |
| 1005 | (match-string 3 numstr)) | |
| 1006 | (substring numstr 0 (match-beginning 2)))) | |
| 1007 | (t numstr))) | |
| 1008 | ||
| 1009 | (defun calculator-standard-displayer (num char) | |
| 1010 | "Standard display function, used to display NUM. | |
| 1011 | Its behavior is determined by `calculator-number-digits' and the given | |
| 1012 | CHAR argument (both will be used to compose a format string). If the | |
| 1013 | char is \"n\" then this function will choose one between %f or %e, this | |
| 1014 | is a work around %g jumping to exponential notation too fast. | |
| 1015 | ||
| 1016 | The special 'left and 'right symbols will make it change the current | |
| 1017 | number of digits displayed (`calculator-number-digits'). | |
| 1018 | ||
| 1019 | It will also remove redundant zeros from the result." | |
| 1020 | (if (symbolp num) | |
| 1021 | (cond ((eq num 'left) | |
| 1022 | (and (> calculator-number-digits 0) | |
| 1023 | (setq calculator-number-digits | |
| 1024 | (1- calculator-number-digits)) | |
| 1025 | (calculator-enter))) | |
| 1026 | ((eq num 'right) | |
| 1027 | (setq calculator-number-digits | |
| 1028 | (1+ calculator-number-digits)) | |
| 1029 | (calculator-enter))) | |
| 4351784f GM |
1030 | (let ((str (if (zerop num) |
| 1031 | "0" | |
| 1032 | (format | |
| 1033 | (concat "%." | |
| 1034 | (number-to-string calculator-number-digits) | |
| 1035 | (if (eq char ?n) | |
| 1036 | (let ((n (abs num))) | |
| 1037 | (if (or (< n 0.001) (> n 1e8)) "e" "f")) | |
| 1038 | (string char))) | |
| 1039 | num)))) | |
| 25c269ef DL |
1040 | (calculator-remove-zeros str)))) |
| 1041 | ||
| 1042 | (defun calculator-eng-display (num) | |
| 1043 | "Display NUM in engineering notation. | |
| 1044 | The number of decimal digits used is controlled by | |
| 1045 | `calculator-number-digits', so to change it at runtime you have to use | |
| 1046 | the 'left or 'right when one of the standard modes is used." | |
| 1047 | (if (symbolp num) | |
| 1048 | (cond ((eq num 'left) | |
| 1049 | (setq calculator-eng-extra | |
| 1050 | (if calculator-eng-extra | |
| 1051 | (1+ calculator-eng-extra) | |
| 1052 | 1)) | |
| 1053 | (let ((calculator-eng-tmp-show t)) (calculator-enter))) | |
| 1054 | ((eq num 'right) | |
| 1055 | (setq calculator-eng-extra | |
| 1056 | (if calculator-eng-extra | |
| 1057 | (1- calculator-eng-extra) | |
| 1058 | -1)) | |
| 1059 | (let ((calculator-eng-tmp-show t)) (calculator-enter)))) | |
| 1060 | (let ((exp 0)) | |
| 1061 | (and (not (= 0 num)) | |
| 1062 | (progn | |
| 1063 | (while (< (abs num) 1.0) | |
| 1064 | (setq num (* num 1000.0)) (setq exp (- exp 3))) | |
| 1065 | (while (> (abs num) 999.0) | |
| 1066 | (setq num (/ num 1000.0)) (setq exp (+ exp 3))) | |
| 1067 | (and calculator-eng-tmp-show | |
| 1068 | (not (= 0 calculator-eng-extra)) | |
| 1069 | (let ((i calculator-eng-extra)) | |
| 1070 | (while (> i 0) | |
| 1071 | (setq num (* num 1000.0)) (setq exp (- exp 3)) | |
| 1072 | (setq i (1- i))) | |
| 1073 | (while (< i 0) | |
| 1074 | (setq num (/ num 1000.0)) (setq exp (+ exp 3)) | |
| 1075 | (setq i (1+ i))))))) | |
| 1076 | (or calculator-eng-tmp-show (setq calculator-eng-extra nil)) | |
| 6ac080e1 GM |
1077 | (let ((str (format (concat "%." (number-to-string |
| 1078 | calculator-number-digits) | |
| 1079 | "f") | |
| 25c269ef DL |
1080 | num))) |
| 1081 | (concat (let ((calculator-remove-zeros | |
| 1082 | ;; make sure we don't leave integers | |
| 1083 | (and calculator-remove-zeros 'x))) | |
| 1084 | (calculator-remove-zeros str)) | |
| 1085 | "e" (number-to-string exp)))))) | |
| 1086 | ||
| 761d3eb3 | 1087 | (defun calculator-number-to-string (num) |
| d240a249 GM |
1088 | "Convert NUM to a displayable string." |
| 1089 | (cond | |
| 1090 | ((and (numberp num) calculator-output-radix) | |
| 1091 | ;; print with radix - for binary I convert the octal number | |
| 1092 | (let ((str (format (if (eq calculator-output-radix 'hex) "%x" "%o") | |
| 1093 | (calculator-truncate | |
| 1094 | (if calculator-2s-complement num (abs num)))))) | |
| 1095 | (if (eq calculator-output-radix 'bin) | |
| 1096 | (let ((i -1) (s "")) | |
| 1097 | (while (< (setq i (1+ i)) (length str)) | |
| 1098 | (setq s | |
| 1099 | (concat s | |
| 1100 | (cdr (assq (aref str i) | |
| 1101 | '((?0 . "000") (?1 . "001") | |
| 1102 | (?2 . "010") (?3 . "011") | |
| 1103 | (?4 . "100") (?5 . "101") | |
| 1104 | (?6 . "110") (?7 . "111"))))))) | |
| 1105 | (string-match "^0*\\(.+\\)" s) | |
| 1106 | (setq str (match-string 1 s)))) | |
| 761d3eb3 RS |
1107 | (if calculator-radix-grouping-mode |
| 1108 | (let ((d (/ (length str) calculator-radix-grouping-digits)) | |
| 1109 | (r (% (length str) calculator-radix-grouping-digits))) | |
| 1110 | (while (>= (setq d (1- d)) (if (zerop r) 1 0)) | |
| 1111 | (let ((i (+ r (* d calculator-radix-grouping-digits)))) | |
| 1112 | (setq str (concat (substring str 0 i) | |
| 1113 | calculator-radix-grouping-separator | |
| 1114 | (substring str i))))))) | |
| d240a249 GM |
1115 | (upcase |
| 1116 | (if (and (not calculator-2s-complement) (< num 0)) | |
| 1117 | (concat "-" str) | |
| 1118 | str)))) | |
| 4351784f GM |
1119 | ((and (numberp num) calculator-displayer) |
| 1120 | (cond | |
| 1121 | ((stringp calculator-displayer) | |
| 1122 | (format calculator-displayer num)) | |
| 1123 | ((symbolp calculator-displayer) | |
| 1124 | (funcall calculator-displayer num)) | |
| 1125 | ((and (consp calculator-displayer) | |
| 1126 | (eq 'std (car calculator-displayer))) | |
| 1127 | (calculator-standard-displayer num (cadr calculator-displayer))) | |
| 1128 | ((listp calculator-displayer) | |
| 1129 | (eval calculator-displayer)) | |
| 1130 | (t (prin1-to-string num t)))) | |
| 25c269ef | 1131 | ;; operators are printed here |
| d240a249 GM |
1132 | (t (prin1-to-string (nth 1 num) t)))) |
| 1133 | ||
| 1134 | (defun calculator-update-display (&optional force) | |
| 1135 | "Update the display. | |
| 1136 | If optional argument FORCE is non-nil, don't use the cached string." | |
| 1137 | (set-buffer calculator-buffer) | |
| 1138 | ;; update calculator-stack-display | |
| 1139 | (if (or force | |
| 1140 | (not (eq (car calculator-stack-display) calculator-stack))) | |
| 1141 | (setq calculator-stack-display | |
| 1142 | (cons calculator-stack | |
| 1143 | (if calculator-stack | |
| 1144 | (concat | |
| 4351784f GM |
1145 | (let ((calculator-displayer |
| 1146 | (if (and calculator-displayers | |
| 1147 | (= 1 (length calculator-stack))) | |
| 1148 | ;; customizable display for a single value | |
| 1149 | (caar calculator-displayers) | |
| 1150 | calculator-displayer))) | |
| 761d3eb3 | 1151 | (mapconcat 'calculator-number-to-string |
| 4351784f GM |
1152 | (reverse calculator-stack) |
| 1153 | " ")) | |
| d240a249 GM |
1154 | " " |
| 1155 | (and calculator-display-fragile | |
| 1156 | calculator-saved-list | |
| 1157 | (= (car calculator-stack) | |
| 1158 | (nth calculator-saved-ptr | |
| 1159 | calculator-saved-list)) | |
| 1160 | (if (= 0 calculator-saved-ptr) | |
| 1161 | (format "[%s]" (length calculator-saved-list)) | |
| 1162 | (format "[%s/%s]" | |
| 1163 | (- (length calculator-saved-list) | |
| 1164 | calculator-saved-ptr) | |
| 1165 | (length calculator-saved-list))))) | |
| 1166 | "")))) | |
| 1167 | (let ((inhibit-read-only t)) | |
| 1168 | (erase-buffer) | |
| 1169 | (insert (calculator-get-prompt))) | |
| 1170 | (set-buffer-modified-p nil) | |
| 1171 | (if calculator-display-fragile | |
| 1172 | (goto-char (1+ (length calculator-prompt))) | |
| 1173 | (goto-char (1- (point))))) | |
| 1174 | ||
| cbb2dddb | 1175 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1176 | ;;; Stack computations |
| 1177 | ||
| d240a249 GM |
1178 | (defun calculator-reduce-stack (prec) |
| 1179 | "Reduce the stack using top operator. | |
| 1180 | PREC is a precedence - reduce everything with higher precedence." | |
| 1181 | (while | |
| 1182 | (cond | |
| 1183 | ((and (cdr (cdr calculator-stack)) ; have three values | |
| 1184 | (consp (nth 0 calculator-stack)) ; two operators & num | |
| 1185 | (numberp (nth 1 calculator-stack)) | |
| 1186 | (consp (nth 2 calculator-stack)) | |
| 1187 | (eq '\) (nth 1 (nth 0 calculator-stack))) | |
| 1188 | (eq '\( (nth 1 (nth 2 calculator-stack)))) | |
| 1189 | ;; reduce "... ( x )" --> "... x" | |
| 1190 | (setq calculator-stack | |
| 1191 | (cons (nth 1 calculator-stack) | |
| 1192 | (nthcdr 3 calculator-stack))) | |
| 1193 | ;; another iteration | |
| 1194 | t) | |
| 1195 | ((and (cdr (cdr calculator-stack)) ; have three values | |
| 1196 | (numberp (nth 0 calculator-stack)) ; two nums & operator | |
| 1197 | (consp (nth 1 calculator-stack)) | |
| 1198 | (numberp (nth 2 calculator-stack)) | |
| 1199 | (= 2 (calculator-op-arity ; binary operator | |
| 1200 | (nth 1 calculator-stack))) | |
| 1201 | (<= prec ; with higher prec. | |
| 1202 | (calculator-op-prec (nth 1 calculator-stack)))) | |
| 1203 | ;; reduce "... x op y" --> "... r", r is the result | |
| 1204 | (setq calculator-stack | |
| 1205 | (cons (calculator-funcall | |
| 1206 | (nth 2 (nth 1 calculator-stack)) | |
| 1207 | (nth 2 calculator-stack) | |
| 1208 | (nth 0 calculator-stack)) | |
| 1209 | (nthcdr 3 calculator-stack))) | |
| 1210 | ;; another iteration | |
| 1211 | t) | |
| 1212 | ((and (>= (length calculator-stack) 2) ; have two values | |
| 1213 | (numberp (nth 0 calculator-stack)) ; number & operator | |
| 1214 | (consp (nth 1 calculator-stack)) | |
| 1215 | (= -1 (calculator-op-arity ; prefix-unary op | |
| 1216 | (nth 1 calculator-stack))) | |
| 1217 | (<= prec ; with higher prec. | |
| 1218 | (calculator-op-prec (nth 1 calculator-stack)))) | |
| 1219 | ;; reduce "... op x" --> "... r" for prefix op | |
| 1220 | (setq calculator-stack | |
| 1221 | (cons (calculator-funcall | |
| 1222 | (nth 2 (nth 1 calculator-stack)) | |
| 1223 | (nth 0 calculator-stack)) | |
| 1224 | (nthcdr 2 calculator-stack))) | |
| 1225 | ;; another iteration | |
| 1226 | t) | |
| 1227 | ((and (cdr calculator-stack) ; have two values | |
| 1228 | (consp (nth 0 calculator-stack)) ; operator & number | |
| 1229 | (numberp (nth 1 calculator-stack)) | |
| 1230 | (= +1 (calculator-op-arity ; postfix-unary op | |
| 1231 | (nth 0 calculator-stack))) | |
| 1232 | (<= prec ; with higher prec. | |
| 1233 | (calculator-op-prec (nth 0 calculator-stack)))) | |
| 1234 | ;; reduce "... x op" --> "... r" for postfix op | |
| 1235 | (setq calculator-stack | |
| 1236 | (cons (calculator-funcall | |
| 1237 | (nth 2 (nth 0 calculator-stack)) | |
| 1238 | (nth 1 calculator-stack)) | |
| 1239 | (nthcdr 2 calculator-stack))) | |
| 1240 | ;; another iteration | |
| 1241 | t) | |
| 1242 | ((and calculator-stack ; have one value | |
| 1243 | (consp (nth 0 calculator-stack)) ; an operator | |
| 1244 | (= 0 (calculator-op-arity ; 0-ary op | |
| 1245 | (nth 0 calculator-stack)))) | |
| 1246 | ;; reduce "... op" --> "... r" for 0-ary op | |
| 1247 | (setq calculator-stack | |
| 1248 | (cons (calculator-funcall | |
| 1249 | (nth 2 (nth 0 calculator-stack))) | |
| 1250 | (nthcdr 1 calculator-stack))) | |
| 1251 | ;; another iteration | |
| 1252 | t) | |
| 1253 | ((and (cdr calculator-stack) ; have two values | |
| 1254 | (numberp (nth 0 calculator-stack)) ; both numbers | |
| 1255 | (numberp (nth 1 calculator-stack))) | |
| 1256 | ;; get rid of redundant numbers: | |
| 1257 | ;; reduce "... y x" --> "... x" | |
| 1258 | ;; needed for 0-ary ops that puts more values | |
| 1259 | (setcdr calculator-stack (cdr (cdr calculator-stack)))) | |
| 1260 | (t ;; no more iterations | |
| 1261 | nil)))) | |
| 1262 | ||
| 25c269ef DL |
1263 | (defun calculator-funcall (f &optional X Y) |
| 1264 | "If F is a symbol, evaluate (F X Y). | |
| 1265 | Otherwise, it should be a list, evaluate it with X, Y bound to the | |
| 1266 | arguments." | |
| 1267 | ;; remember binary ops for calculator-repR/L | |
| 1268 | (if Y (setq calculator-last-opXY (list f X Y))) | |
| 1269 | (condition-case nil | |
| 1270 | ;; there used to be code here that returns 0 if the result was | |
| 1271 | ;; smaller than calculator-epsilon (1e-15). I don't think this is | |
| 1272 | ;; necessary now. | |
| 1273 | (if (symbolp f) | |
| 1274 | (cond ((and X Y) (funcall f X Y)) | |
| 1275 | (X (funcall f X)) | |
| 1276 | (t (funcall f))) | |
| 1277 | ;; f is an expression | |
| 1278 | (let* ((__f__ f) ; so we can get this value below... | |
| 1279 | (TX (calculator-truncate X)) | |
| 1280 | (TY (and Y (calculator-truncate Y))) | |
| 1281 | (DX (if calculator-deg (/ (* X pi) 180) X)) | |
| 1282 | (L calculator-saved-list) | |
| 1283 | (Fbound (fboundp 'F)) | |
| 1284 | (Fsave (and Fbound (symbol-function 'F))) | |
| 1285 | (Dbound (fboundp 'D)) | |
| 1286 | (Dsave (and Dbound (symbol-function 'D)))) | |
| 1287 | ;; a shortened version of flet | |
| 1288 | (fset 'F (function | |
| 1289 | (lambda (&optional x y) | |
| 1290 | (calculator-funcall __f__ x y)))) | |
| 1291 | (fset 'D (function | |
| 1292 | (lambda (x) | |
| 9e0d4f9e | 1293 | (if calculator-deg (/ (* x 180) float-pi) x)))) |
| 25c269ef DL |
1294 | (unwind-protect (eval f) |
| 1295 | (if Fbound (fset 'F Fsave) (fmakunbound 'F)) | |
| 1296 | (if Dbound (fset 'D Dsave) (fmakunbound 'D))))) | |
| 1297 | (error 0))) | |
| 1298 | ||
| cbb2dddb | 1299 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1300 | ;;; Input interaction |
| 1301 | ||
| 86f1e1ec GM |
1302 | (defun calculator-last-input (&optional keys) |
| 1303 | "Last char (or event or event sequence) that was read. | |
| 1304 | Optional string argument KEYS will force using it as the keys entered." | |
| 1305 | (let ((inp (or keys (this-command-keys)))) | |
| d240a249 GM |
1306 | (if (or (stringp inp) (not (arrayp inp))) |
| 1307 | inp | |
| 1308 | ;; this translates kp-x to x and [tries to] create a string to | |
| 1309 | ;; lookup operators | |
| 1310 | (let* ((i -1) (converted-str (make-string (length inp) ? )) k) | |
| 1311 | ;; converts an array to a string the ops lookup with keypad | |
| 1312 | ;; input | |
| 1313 | (while (< (setq i (1+ i)) (length inp)) | |
| 1314 | (setq k (aref inp i)) | |
| 1315 | ;; if Emacs will someday have a event-key, then this would | |
| 1316 | ;; probably be modified anyway | |
| d88757d6 RS |
1317 | (and (if (fboundp 'key-press-event-p) (key-press-event-p k)) |
| 1318 | (if (fboundp 'event-key) | |
| 1319 | (and (event-key k) (setq k (event-key k))))) | |
| d240a249 GM |
1320 | ;; assume all symbols are translatable with an ascii-character |
| 1321 | (and (symbolp k) | |
| 1322 | (setq k (or (get k 'ascii-character) ? ))) | |
| 1323 | (aset converted-str i k)) | |
| 1324 | converted-str)))) | |
| 1325 | ||
| 1326 | (defun calculator-clear-fragile (&optional op) | |
| 1327 | "Clear the fragile flag if it was set, then maybe reset all. | |
| 1328 | OP is the operator (if any) that caused this call." | |
| 1329 | (if (and calculator-display-fragile | |
| 1330 | (or (not op) | |
| 1331 | (= -1 (calculator-op-arity op)) | |
| 1332 | (= 0 (calculator-op-arity op)))) | |
| 1333 | ;; reset if last calc finished, and now get a num or prefix or 0-ary | |
| 25c269ef | 1334 | ;; op |
| d240a249 GM |
1335 | (calculator-reset)) |
| 1336 | (setq calculator-display-fragile nil)) | |
| 1337 | ||
| 1338 | (defun calculator-digit () | |
| 1339 | "Enter a single digit." | |
| 1340 | (interactive) | |
| 1341 | (let ((inp (aref (calculator-last-input) 0))) | |
| 1342 | (if (and (or calculator-display-fragile | |
| 1343 | (not (numberp (car calculator-stack)))) | |
| 1344 | (cond | |
| 1345 | ((not calculator-input-radix) (<= inp ?9)) | |
| 1346 | ((eq calculator-input-radix 'bin) (<= inp ?1)) | |
| 1347 | ((eq calculator-input-radix 'oct) (<= inp ?7)) | |
| 1348 | (t t))) | |
| 1349 | ;; enter digit if starting a new computation or have an op on the | |
| 25c269ef | 1350 | ;; stack |
| d240a249 GM |
1351 | (progn |
| 1352 | (calculator-clear-fragile) | |
| 1353 | (let ((digit (upcase (char-to-string inp)))) | |
| 1354 | (if (equal calculator-curnum "0") | |
| 1355 | (setq calculator-curnum nil)) | |
| 1356 | (setq calculator-curnum | |
| 1357 | (concat (or calculator-curnum "") digit))) | |
| 1358 | (calculator-update-display))))) | |
| 1359 | ||
| 1360 | (defun calculator-decimal () | |
| 1361 | "Enter a decimal period." | |
| 1362 | (interactive) | |
| 1363 | (if (and (not calculator-input-radix) | |
| 1364 | (or calculator-display-fragile | |
| 1365 | (not (numberp (car calculator-stack)))) | |
| 1366 | (not (and calculator-curnum | |
| 1367 | (string-match "[.eE]" calculator-curnum)))) | |
| 1368 | ;; enter the period on the same condition as a digit, only if no | |
| 25c269ef | 1369 | ;; period or exponent entered yet |
| d240a249 GM |
1370 | (progn |
| 1371 | (calculator-clear-fragile) | |
| 1372 | (setq calculator-curnum (concat (or calculator-curnum "0") ".")) | |
| 1373 | (calculator-update-display)))) | |
| 1374 | ||
| 1375 | (defun calculator-exp () | |
| 1376 | "Enter an `E' exponent character, or a digit in hex input mode." | |
| 1377 | (interactive) | |
| 1378 | (if calculator-input-radix | |
| 1379 | (calculator-digit) | |
| 1380 | (if (and (or calculator-display-fragile | |
| 1381 | (not (numberp (car calculator-stack)))) | |
| 1382 | (not (and calculator-curnum | |
| 1383 | (string-match "[eE]" calculator-curnum)))) | |
| 25c269ef | 1384 | ;; same condition as above, also no E so far |
| d240a249 GM |
1385 | (progn |
| 1386 | (calculator-clear-fragile) | |
| 1387 | (setq calculator-curnum (concat (or calculator-curnum "1") "e")) | |
| 1388 | (calculator-update-display))))) | |
| 1389 | ||
| 86f1e1ec GM |
1390 | (defun calculator-op (&optional keys) |
| 1391 | "Enter an operator on the stack, doing all necessary reductions. | |
| 1392 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 | 1393 | (interactive) |
| 25c269ef DL |
1394 | (catch 'op-error |
| 1395 | (let* ((last-inp (calculator-last-input keys)) | |
| 1396 | (op (assoc last-inp calculator-operators))) | |
| 1397 | (calculator-clear-fragile op) | |
| 1398 | (if (and calculator-curnum (/= (calculator-op-arity op) 0)) | |
| 1399 | (setq calculator-stack | |
| 1400 | (cons (calculator-curnum-value) calculator-stack))) | |
| 1401 | (setq calculator-curnum nil) | |
| 1402 | (if (and (= 2 (calculator-op-arity op)) | |
| 1403 | (not (and calculator-stack | |
| 1404 | (numberp (nth 0 calculator-stack))))) | |
| 1405 | ;; we have a binary operator but no number - search for a prefix | |
| 1406 | ;; version | |
| 1407 | (let ((rest-ops calculator-operators)) | |
| 1408 | (while (not (equal last-inp (car (car rest-ops)))) | |
| 1409 | (setq rest-ops (cdr rest-ops))) | |
| 1410 | (setq op (assoc last-inp (cdr rest-ops))) | |
| 1411 | (if (not (and op (= -1 (calculator-op-arity op)))) | |
| 1412 | ;;(error "Binary operator without a first operand") | |
| 1413 | (progn | |
| 761d3eb3 RS |
1414 | (calculator-message |
| 1415 | "Binary operator without a first operand") | |
| 25c269ef DL |
1416 | (throw 'op-error nil))))) |
| 1417 | (calculator-reduce-stack | |
| 1418 | (cond ((eq (nth 1 op) '\() 10) | |
| 1419 | ((eq (nth 1 op) '\)) 0) | |
| 1420 | (t (calculator-op-prec op)))) | |
| 1421 | (if (or (and (= -1 (calculator-op-arity op)) | |
| 1422 | (numberp (car calculator-stack))) | |
| 1423 | (and (/= (calculator-op-arity op) -1) | |
| 1424 | (/= (calculator-op-arity op) 0) | |
| 1425 | (not (numberp (car calculator-stack))))) | |
| 1426 | ;;(error "Unterminated expression") | |
| 1427 | (progn | |
| 761d3eb3 | 1428 | (calculator-message "Unterminated expression") |
| 25c269ef DL |
1429 | (throw 'op-error nil))) |
| 1430 | (setq calculator-stack (cons op calculator-stack)) | |
| 1431 | (calculator-reduce-stack (calculator-op-prec op)) | |
| 1432 | (and (= (length calculator-stack) 1) | |
| 1433 | (numberp (nth 0 calculator-stack)) | |
| 1434 | ;; the display is fragile if it contains only one number | |
| 1435 | (setq calculator-display-fragile t) | |
| 1436 | ;; add number to the saved-list | |
| 1437 | calculator-add-saved | |
| 1438 | (if (= 0 calculator-saved-ptr) | |
| 1439 | (setq calculator-saved-list | |
| 1440 | (cons (car calculator-stack) calculator-saved-list)) | |
| 1441 | (let ((p (nthcdr (1- calculator-saved-ptr) | |
| 1442 | calculator-saved-list))) | |
| 1443 | (setcdr p (cons (car calculator-stack) (cdr p)))))) | |
| 1444 | (calculator-update-display)))) | |
| d240a249 GM |
1445 | |
| 1446 | (defun calculator-op-or-exp () | |
| 1447 | "Either enter an operator or a digit. | |
| 25c269ef | 1448 | Used with +/- for entering them as digits in numbers like 1e-3 (there is |
| a1ff7705 | 1449 | no need for negative numbers since these are handled by unary operators)." |
| d240a249 GM |
1450 | (interactive) |
| 1451 | (if (and (not calculator-display-fragile) | |
| 1452 | calculator-curnum | |
| 1453 | (string-match "[eE]$" calculator-curnum)) | |
| 1454 | (calculator-digit) | |
| 1455 | (calculator-op))) | |
| 1456 | ||
| cbb2dddb | 1457 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1458 | ;;; Input/output modes (not display) |
| 1459 | ||
| d240a249 GM |
1460 | (defun calculator-dec/deg-mode () |
| 1461 | "Set decimal mode for display & input, if decimal, toggle deg mode." | |
| 1462 | (interactive) | |
| 1463 | (if calculator-curnum | |
| 1464 | (setq calculator-stack | |
| 1465 | (cons (calculator-curnum-value) calculator-stack))) | |
| 1466 | (setq calculator-curnum nil) | |
| 1467 | (if (or calculator-input-radix calculator-output-radix) | |
| 1468 | (progn (setq calculator-input-radix nil) | |
| 1469 | (setq calculator-output-radix nil)) | |
| 1470 | ;; already decimal - toggle degrees mode | |
| 1471 | (setq calculator-deg (not calculator-deg))) | |
| 1472 | (calculator-update-display t)) | |
| 1473 | ||
| 86f1e1ec GM |
1474 | (defun calculator-radix-mode (&optional keys) |
| 1475 | "Set input and display radix modes. | |
| 1476 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 | 1477 | (interactive) |
| 86f1e1ec GM |
1478 | (calculator-radix-input-mode keys) |
| 1479 | (calculator-radix-output-mode keys)) | |
| d240a249 | 1480 | |
| 86f1e1ec GM |
1481 | (defun calculator-radix-input-mode (&optional keys) |
| 1482 | "Set input radix modes. | |
| 1483 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 GM |
1484 | (interactive) |
| 1485 | (if calculator-curnum | |
| 1486 | (setq calculator-stack | |
| 1487 | (cons (calculator-curnum-value) calculator-stack))) | |
| 1488 | (setq calculator-curnum nil) | |
| 1489 | (setq calculator-input-radix | |
| 86f1e1ec | 1490 | (let ((inp (calculator-last-input keys))) |
| d240a249 GM |
1491 | (cdr (assq (upcase (aref inp (1- (length inp)))) |
| 1492 | calculator-char-radix)))) | |
| 1493 | (calculator-update-display)) | |
| 1494 | ||
| 86f1e1ec GM |
1495 | (defun calculator-radix-output-mode (&optional keys) |
| 1496 | "Set display radix modes. | |
| 1497 | Optional string argument KEYS will force using it as the keys entered." | |
| d240a249 GM |
1498 | (interactive) |
| 1499 | (if calculator-curnum | |
| 1500 | (setq calculator-stack | |
| 1501 | (cons (calculator-curnum-value) calculator-stack))) | |
| 1502 | (setq calculator-curnum nil) | |
| 1503 | (setq calculator-output-radix | |
| 86f1e1ec | 1504 | (let ((inp (calculator-last-input keys))) |
| d240a249 GM |
1505 | (cdr (assq (upcase (aref inp (1- (length inp)))) |
| 1506 | calculator-char-radix)))) | |
| 1507 | (calculator-update-display t)) | |
| 1508 | ||
| cbb2dddb | 1509 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1510 | ;;; Saved values list |
| 1511 | ||
| d240a249 GM |
1512 | (defun calculator-save-on-list () |
| 1513 | "Evaluate current expression, put result on the saved values list." | |
| 1514 | (interactive) | |
| 1515 | (let ((calculator-add-saved t)) ; marks the result to be added | |
| 1516 | (calculator-enter))) | |
| 1517 | ||
| 1518 | (defun calculator-clear-saved () | |
| 1519 | "Clear the list of saved values in `calculator-saved-list'." | |
| 1520 | (interactive) | |
| 1521 | (setq calculator-saved-list nil) | |
| 25c269ef | 1522 | (setq calculator-saved-ptr 0) |
| d240a249 GM |
1523 | (calculator-update-display t)) |
| 1524 | ||
| 1525 | (defun calculator-saved-move (n) | |
| 1526 | "Go N elements up the list of saved values." | |
| 1527 | (interactive) | |
| 1528 | (and calculator-saved-list | |
| 1529 | (or (null calculator-stack) calculator-display-fragile) | |
| 1530 | (progn | |
| 1531 | (setq calculator-saved-ptr | |
| 1532 | (max (min (+ n calculator-saved-ptr) | |
| 1533 | (length calculator-saved-list)) | |
| 1534 | 0)) | |
| 1535 | (if (nth calculator-saved-ptr calculator-saved-list) | |
| 1536 | (setq calculator-stack | |
| 1537 | (list (nth calculator-saved-ptr calculator-saved-list)) | |
| 1538 | calculator-display-fragile t) | |
| 86f1e1ec GM |
1539 | (calculator-reset)) |
| 1540 | (calculator-update-display)))) | |
| d240a249 GM |
1541 | |
| 1542 | (defun calculator-saved-up () | |
| 1543 | "Go up the list of saved values." | |
| 1544 | (interactive) | |
| 1545 | (calculator-saved-move +1)) | |
| 1546 | ||
| 1547 | (defun calculator-saved-down () | |
| 1548 | "Go down the list of saved values." | |
| 1549 | (interactive) | |
| 1550 | (calculator-saved-move -1)) | |
| 1551 | ||
| cbb2dddb | 1552 | ;;;--------------------------------------------------------------------- |
| 25c269ef DL |
1553 | ;;; Misc functions |
| 1554 | ||
| d240a249 GM |
1555 | (defun calculator-open-paren () |
| 1556 | "Equivalents of `(' use this." | |
| 1557 | (interactive) | |
| 86f1e1ec | 1558 | (calculator-op "(")) |
| d240a249 GM |
1559 | |
| 1560 | (defun calculator-close-paren () | |
| 1561 | "Equivalents of `)' use this." | |
| 1562 | (interactive) | |
| 86f1e1ec | 1563 | (calculator-op ")")) |
| d240a249 GM |
1564 | |
| 1565 | (defun calculator-enter () | |
| 86f1e1ec | 1566 | "Evaluate current expression." |
| d240a249 | 1567 | (interactive) |
| 86f1e1ec | 1568 | (calculator-op "=")) |
| d240a249 GM |
1569 | |
| 1570 | (defun calculator-backspace () | |
| 1571 | "Backward delete a single digit or a stack element." | |
| 1572 | (interactive) | |
| 1573 | (if calculator-curnum | |
| 1574 | (setq calculator-curnum | |
| 1575 | (if (> (length calculator-curnum) 1) | |
| 1576 | (substring calculator-curnum | |
| 1577 | 0 (1- (length calculator-curnum))) | |
| 1578 | nil)) | |
| 1579 | (setq calculator-stack (cdr calculator-stack))) | |
| 1580 | (calculator-update-display)) | |
| 1581 | ||
| 1582 | (defun calculator-clear () | |
| 1583 | "Clear current number." | |
| 1584 | (interactive) | |
| 1585 | (setq calculator-curnum nil) | |
| 1586 | (cond | |
| 1587 | ;; if the current number is from the saved-list - remove it | |
| 1588 | ((and calculator-display-fragile | |
| 1589 | calculator-saved-list | |
| 1590 | (= (car calculator-stack) | |
| 1591 | (nth calculator-saved-ptr calculator-saved-list))) | |
| 1592 | (if (= 0 calculator-saved-ptr) | |
| 1593 | (setq calculator-saved-list (cdr calculator-saved-list)) | |
| 1594 | (let ((p (nthcdr (1- calculator-saved-ptr) | |
| 1595 | calculator-saved-list))) | |
| 1596 | (setcdr p (cdr (cdr p))) | |
| 1597 | (setq calculator-saved-ptr (1- calculator-saved-ptr)))) | |
| 1598 | (if calculator-saved-list | |
| 1599 | (setq calculator-stack | |
| 1600 | (list (nth calculator-saved-ptr calculator-saved-list))) | |
| 1601 | (calculator-reset))) | |
| 1602 | ;; reset if fragile or double clear | |
| 1603 | ((or calculator-display-fragile (eq last-command this-command)) | |
| 1604 | (calculator-reset))) | |
| 1605 | (calculator-update-display)) | |
| 1606 | ||
| 1607 | (defun calculator-copy () | |
| 1608 | "Copy current number to the `kill-ring'." | |
| 1609 | (interactive) | |
| 4351784f GM |
1610 | (let ((calculator-displayer |
| 1611 | (or calculator-copy-displayer calculator-displayer)) | |
| 1612 | (calculator-displayers | |
| 1613 | (if calculator-copy-displayer nil calculator-displayers))) | |
| 1614 | (calculator-enter) | |
| 1214bb6e | 1615 | ;; remove trailing spaces and an index |
| 4351784f GM |
1616 | (let ((s (cdr calculator-stack-display))) |
| 1617 | (and s | |
| 1618 | (if (string-match "^\\([^ ]+\\) *\\(\\[[0-9/]+\\]\\)? *$" s) | |
| 1619 | (setq s (match-string 1 s))) | |
| 1620 | (kill-new s))))) | |
| d240a249 GM |
1621 | |
| 1622 | (defun calculator-set-register (reg) | |
| 1623 | "Set a register value for REG." | |
| 1624 | (interactive "cRegister to store into: ") | |
| 1625 | (let* ((as (assq reg calculator-registers)) | |
| 1626 | (val (progn (calculator-enter) (car calculator-stack)))) | |
| 1627 | (if as | |
| 1628 | (setcdr as val) | |
| 1629 | (setq calculator-registers | |
| 1630 | (cons (cons reg val) calculator-registers))) | |
| 761d3eb3 | 1631 | (calculator-message "[%c] := %S" reg val))) |
| d240a249 GM |
1632 | |
| 1633 | (defun calculator-put-value (val) | |
| 1634 | "Paste VAL as if entered. | |
| 1635 | Used by `calculator-paste' and `get-register'." | |
| 1636 | (if (and (numberp val) | |
| 1637 | ;; (not calculator-curnum) | |
| 1638 | (or calculator-display-fragile | |
| 1639 | (not (numberp (car calculator-stack))))) | |
| 1640 | (progn | |
| 1641 | (calculator-clear-fragile) | |
| 4351784f | 1642 | (setq calculator-curnum (let ((calculator-displayer "%S")) |
| 761d3eb3 | 1643 | (calculator-number-to-string val))) |
| d240a249 GM |
1644 | (calculator-update-display)))) |
| 1645 | ||
| 1646 | (defun calculator-paste () | |
| 1647 | "Paste a value from the `kill-ring'." | |
| 1648 | (interactive) | |
| 1649 | (calculator-put-value | |
| 761d3eb3 RS |
1650 | (let ((str (replace-regexp-in-string |
| 1651 | "^ *\\(.+[^ ]\\) *$" "\\1" (current-kill 0)))) | |
| 1652 | (and (not calculator-input-radix) | |
| 1653 | calculator-paste-decimals | |
| cbb2dddb GM |
1654 | (string-match "\\([0-9]+\\)\\(\\.[0-9]+\\)?\\(e[0-9]+\\)?" |
| 1655 | str) | |
| 1656 | (or (match-string 1 str) | |
| 1657 | (match-string 2 str) | |
| 1658 | (match-string 3 str)) | |
| 761d3eb3 | 1659 | (setq str (concat (or (match-string 1 str) "0") |
| cbb2dddb | 1660 | (or (match-string 2 str) ".0") |
| 761d3eb3 RS |
1661 | (or (match-string 3 str) "")))) |
| 1662 | (condition-case nil (calculator-string-to-number str) | |
| 25c269ef | 1663 | (error nil))))) |
| d240a249 GM |
1664 | |
| 1665 | (defun calculator-get-register (reg) | |
| 1666 | "Get a value from a register REG." | |
| 1667 | (interactive "cRegister to get value from: ") | |
| 1668 | (calculator-put-value (cdr (assq reg calculator-registers)))) | |
| 1669 | ||
| 1670 | (defun calculator-help () | |
| 1671 | ;; this is used as the quick reference screen you get with `h' | |
| 1672 | "Quick reference: | |
| 1673 | * numbers/operators/parens/./e - enter expressions | |
| 1674 | + - * / \\(div) %(rem) _(-X,postfix) ;(1/X,postfix) ^(exp) L(og) | |
| 1675 | Q(sqrt) !(fact) S(in) C(os) T(an) |(or) #(xor) &(and) ~(not) | |
| 1676 | * >/< repeats last binary operation with its 2nd (1st) arg as postfix op | |
| 25c269ef DL |
1677 | * I inverses next trig function * '/\"/{} - display/display args |
| 1678 | * D - switch to all-decimal, or toggle deg/rad mode | |
| d240a249 GM |
1679 | * B/O/H/X - binary/octal/hex mode for i/o (X is a shortcut for H) |
| 1680 | * i/o - prefix for d/b/o/x - set only input/output modes | |
| 1681 | * enter/= - evaluate current expr. * s/g - set/get a register | |
| 1682 | * space - evaluate & save on list * l/v - list total/average | |
| 1683 | * up/down/C-p/C-n - browse saved * C-delete - clear all saved | |
| 86f1e1ec | 1684 | * C-insert - copy whole expr. * C-return - evaluate, copy, exit |
| d240a249 GM |
1685 | * insert - paste a number * backspace- delete backwards |
| 1686 | * delete - clear argument or list value or whole expression (twice) | |
| 1687 | * escape/q - exit." | |
| 1688 | (interactive) | |
| 1689 | (if (eq last-command 'calculator-help) | |
| 1690 | (let ((mode-name "Calculator") | |
| 1691 | (major-mode 'calculator-mode) | |
| 1692 | (g-map (current-global-map)) | |
| 1693 | (win (selected-window))) | |
| 1694 | (require 'ehelp) | |
| 1695 | (if calculator-electric-mode | |
| 1696 | (use-global-map calculator-saved-global-map)) | |
| cbb2dddb GM |
1697 | (if (or (not calculator-electric-mode) |
| 1698 | ;; XEmacs has a problem with electric-describe-mode | |
| f8246027 | 1699 | (featurep 'xemacs)) |
| cbb2dddb GM |
1700 | (describe-mode) |
| 1701 | (electric-describe-mode)) | |
| d240a249 GM |
1702 | (if calculator-electric-mode |
| 1703 | (use-global-map g-map)) | |
| 1704 | (select-window win) ; these are for XEmacs (also below) | |
| 1705 | (message nil)) | |
| 1706 | (let ((one (one-window-p t)) | |
| 1707 | (win (selected-window)) | |
| 1708 | (help-buf (get-buffer-create "*Help*"))) | |
| 1709 | (save-window-excursion | |
| 1710 | (with-output-to-temp-buffer "*Help*" | |
| 1711 | (princ (documentation 'calculator-help))) | |
| 1712 | (if one | |
| 1713 | (shrink-window-if-larger-than-buffer | |
| 1714 | (get-buffer-window help-buf))) | |
| 1715 | (message | |
| 1716 | "`%s' again for more help, any other key continues normally." | |
| 1717 | (calculator-last-input)) | |
| 1718 | (select-window win) | |
| 1719 | (sit-for 360)) | |
| 1720 | (select-window win)))) | |
| 1721 | ||
| 1722 | (defun calculator-quit () | |
| 1723 | "Quit calculator." | |
| 1724 | (interactive) | |
| 1725 | (set-buffer calculator-buffer) | |
| 1726 | (let ((inhibit-read-only t)) (erase-buffer)) | |
| 1727 | (if (not calculator-electric-mode) | |
| 1728 | (progn | |
| 1729 | (condition-case nil | |
| 1730 | (while (get-buffer-window calculator-buffer) | |
| 1731 | (delete-window (get-buffer-window calculator-buffer))) | |
| 1732 | (error nil)) | |
| 1733 | (kill-buffer calculator-buffer))) | |
| 1734 | (setq calculator-buffer nil) | |
| 1735 | (message "Calculator done.") | |
| 1736 | (if calculator-electric-mode (throw 'calculator-done nil))) | |
| 1737 | ||
| 1738 | (defun calculator-save-and-quit () | |
| 1739 | "Quit the calculator, saving the result on the `kill-ring'." | |
| 1740 | (interactive) | |
| 1741 | (calculator-enter) | |
| 1742 | (calculator-copy) | |
| 1743 | (calculator-quit)) | |
| 1744 | ||
| d240a249 | 1745 | (defun calculator-repR (x) |
| a1ff7705 | 1746 | "Repeat the last binary operation with its second argument and X. |
| d240a249 GM |
1747 | To use this, apply a binary operator (evaluate it), then call this." |
| 1748 | (if calculator-last-opXY | |
| 1749 | ;; avoid rebinding calculator-last-opXY | |
| 1750 | (let ((calculator-last-opXY calculator-last-opXY)) | |
| 1751 | (calculator-funcall | |
| 1752 | (car calculator-last-opXY) x (nth 2 calculator-last-opXY))) | |
| 1753 | x)) | |
| 1754 | ||
| 1755 | (defun calculator-repL (x) | |
| a1ff7705 | 1756 | "Repeat the last binary operation with its first argument and X. |
| d240a249 GM |
1757 | To use this, apply a binary operator (evaluate it), then call this." |
| 1758 | (if calculator-last-opXY | |
| 1759 | ;; avoid rebinding calculator-last-opXY | |
| 1760 | (let ((calculator-last-opXY calculator-last-opXY)) | |
| 1761 | (calculator-funcall | |
| 1762 | (car calculator-last-opXY) (nth 1 calculator-last-opXY) x)) | |
| 1763 | x)) | |
| 1764 | ||
| f50347a9 JB |
1765 | (defun calculator-integer-p (x) |
| 1766 | "Non-nil if X is equal to an integer." | |
| 1767 | (condition-case nil | |
| 1768 | (= x (ftruncate x)) | |
| 1769 | (error nil))) | |
| 1770 | ||
| 1771 | (defun calculator-expt (x y) | |
| 1772 | "Compute X^Y, dealing with errors appropriately." | |
| 1773 | (condition-case | |
| 1774 | nil | |
| 1775 | (expt x y) | |
| 1776 | (domain-error 0.0e+NaN) | |
| 1777 | (range-error | |
| b4739e5d JB |
1778 | (cond |
| 1779 | ((and (< x 1.0) (> x -1.0)) | |
| 1780 | ;; For small x, the range error comes from large y. | |
| 1781 | 0.0) | |
| 1782 | ((and (> x 0.0) (< y 0.0)) | |
| cba1a4bd | 1783 | ;; For large positive x and negative y, the range error |
| b4739e5d JB |
1784 | ;; comes from large negative y. |
| 1785 | 0.0) | |
| 1786 | ((and (> x 0.0) (> y 0.0)) | |
| cba1a4bd | 1787 | ;; For large positive x and positive y, the range error |
| b4739e5d JB |
1788 | ;; comes from large y. |
| 1789 | 1.0e+INF) | |
| 1790 | ;; For the rest, x must be large and negative. | |
| 1791 | ;; The range errors come from large integer y. | |
| 1792 | ((< y 0.0) | |
| 1793 | 0.0) | |
| cba1a4bd | 1794 | ((eq (logand (truncate y) 1) 1) ; expansion of cl `oddp' |
| b4739e5d JB |
1795 | ;; If y is odd |
| 1796 | -1.0e+INF) | |
| 1797 | (t | |
| a1ff7705 | 1798 | ;; |
| b4739e5d | 1799 | 1.0e+INF))) |
| f50347a9 JB |
1800 | (error 0.0e+NaN))) |
| 1801 | ||
| d240a249 GM |
1802 | (defun calculator-fact (x) |
| 1803 | "Simple factorial of X." | |
| f50347a9 JB |
1804 | (if (and (>= x 0) |
| 1805 | (calculator-integer-p x)) | |
| 1806 | (if (= (calculator-expt (/ x 3.0) x) 1.0e+INF) | |
| 1807 | 1.0e+INF | |
| 1808 | (let ((r (if (<= x 10) 1 1.0))) | |
| 1809 | (while (> x 0) | |
| 1810 | (setq r (* r (truncate x))) | |
| 1811 | (setq x (1- x))) | |
| 1812 | (+ 0.0 r))) | |
| 1813 | (if (= x 1.0e+INF) | |
| 1814 | x | |
| 1815 | 0.0e+NaN))) | |
| d240a249 GM |
1816 | |
| 1817 | (defun calculator-truncate (n) | |
| 1818 | "Truncate N, return 0 in case of overflow." | |
| 1819 | (condition-case nil (truncate n) (error 0))) | |
| 1820 | ||
| 1821 | ||
| 1822 | (provide 'calculator) | |
| 1823 | ||
| 1824 | ;;; calculator.el ends here |