1 ;;; calc-stuff.el --- miscellaneous functions for Calc
3 ;; Copyright (C) 1990-1993, 2001-2012 Free Software Foundation, Inc.
5 ;; Author: David Gillespie <daveg@synaptics.com>
6 ;; Maintainer: Jay Belanger <jay.p.belanger@gmail.com>
8 ;; This file is part of GNU Emacs.
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.
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.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
27 ;; This file is autoloaded from calc-ext.el.
32 (defun calc-num-prefix (n)
33 "Use the number at the top of stack as the numeric prefix for the next command.
34 With a prefix, push that prefix as a number onto the stack."
38 (calc-enter-result 0 "" (prefix-numeric-value n))
39 (let ((num (calc-top 1)))
40 (if (math-messy-integerp num)
41 (setq num (math-trunc num)))
43 (error "Argument must be a small integer"))
46 (message "%d-" num))))) ; a (lame) simulation of the real thing...
49 (defun calc-more-recursion-depth (n)
53 (calc-less-recursion-depth n)
54 (let ((n (if n (prefix-numeric-value n) 2)))
56 (setq max-specpdl-size (* max-specpdl-size n)
57 max-lisp-eval-depth (* max-lisp-eval-depth n))))
58 (message "max-lisp-eval-depth is now %d" max-lisp-eval-depth))))
60 (defun calc-less-recursion-depth (n)
62 (let ((n (if n (prefix-numeric-value n) 2)))
64 (setq max-specpdl-size
65 (max (/ max-specpdl-size n) 600)
67 (max (/ max-lisp-eval-depth n) 200))))
68 (message "max-lisp-eval-depth is now %d" max-lisp-eval-depth))
71 (defvar calc-which-why nil)
72 (defvar calc-last-why-command nil)
73 (defun calc-explain-why (why &optional more)
76 (let* ((pred (car why))
78 (msg (cond ((not pred) "Wrong type of argument")
80 ((eq pred 'integerp) "Integer expected")
82 (if (and arg (Math-objvecp arg) (not (Math-integerp arg)))
84 "Nonnegative integer expected"))
86 (if (and arg (Math-objvecp arg) (not (Math-integerp arg)))
88 "Positive integer expected"))
90 (if (and arg (Math-integerp arg))
91 "Small integer expected"
93 ((eq pred 'fixnatnump)
94 (if (and arg (Math-natnump arg))
95 "Small integer expected"
96 (if (and arg (Math-objvecp arg)
97 (not (Math-integerp arg)))
99 "Nonnegative integer expected")))
100 ((eq pred 'fixposintp)
101 (if (and arg (Math-integerp arg) (Math-posp arg))
102 "Small integer expected"
103 (if (and arg (Math-objvecp arg)
104 (not (Math-integerp arg)))
106 "Positive integer expected")))
107 ((eq pred 'posp) "Positive number expected")
108 ((eq pred 'negp) "Negative number expected")
109 ((eq pred 'nonzerop) "Nonzero number expected")
110 ((eq pred 'realp) "Real number expected")
111 ((eq pred 'anglep) "Real number expected")
112 ((eq pred 'hmsp) "HMS form expected")
114 (if (and arg (Math-objectp arg)
115 (not (Math-realp arg)))
116 "Real number or date form expected"
117 "Date form expected"))
118 ((eq pred 'numberp) "Number expected")
119 ((eq pred 'scalarp) "Number expected")
120 ((eq pred 'vectorp) "Vector or matrix expected")
121 ((eq pred 'numvecp) "Number or vector expected")
122 ((eq pred 'matrixp) "Matrix expected")
123 ((eq pred 'square-matrixp)
124 (if (and arg (math-matrixp arg))
125 "Square matrix expected"
127 ((eq pred 'objectp) "Number expected")
128 ((eq pred 'constp) "Constant expected")
129 ((eq pred 'range) "Argument out of range")
130 (t (format "%s expected" pred))))
132 (calc-can-abbrev-vectors t))
133 (while (setq why (cdr why))
135 (setq msg (concat msg punc (if (stringp (car why))
137 (math-format-flat-expr (car why) 0)))
139 (message "%s%s" msg (if more " [w=more]" ""))))
143 (if (not (eq this-command last-command))
144 (if (eq last-command calc-last-why-command)
145 (setq calc-which-why (cdr calc-why))
146 (setq calc-which-why calc-why)))
149 (calc-explain-why (car calc-which-why) (cdr calc-which-why))
150 (setq calc-which-why (cdr calc-which-why)))
153 (message "(No further explanations available)")
154 (setq calc-which-why calc-why))
155 (message "No explanations available"))))
157 ;; The following caches are declared in other files, but are
159 (defvar math-lud-cache) ; calc-mtx.el
160 (defvar math-log2-cache) ; calc-bin.el
161 (defvar math-radix-digits-cache) ; calc-bin.el
162 (defvar math-radix-float-cache-tag) ; calc-bin.el
163 (defvar math-random-cache) ; calc-comb.el
164 (defvar math-max-digits-cache) ; calc-bin.el
165 (defvar math-integral-cache) ; calcalg2.el
166 (defvar math-units-table) ; calc-units.el
167 (defvar math-decls-cache-tag) ; calc-arith.el
168 (defvar math-format-date-cache) ; calc-forms.el
169 (defvar math-holidays-cache-tag) ; calc-forms.el
171 (defun calc-flush-caches (&optional inhibit-msg)
174 (setq math-lud-cache nil
176 math-radix-digits-cache nil
177 math-radix-float-cache-tag nil
178 math-random-cache nil
179 math-max-digits-cache nil
180 math-integral-cache nil
182 math-decls-cache-tag nil
183 math-eval-rules-cache-tag t
184 math-format-date-cache nil
185 math-holidays-cache-tag t)
186 (mapc (function (lambda (x) (set x -100))) math-cache-list)
188 (message "All internal calculator caches have been reset"))))
193 (defun calc-clean (n)
196 (calc-with-default-simplification
197 (let ((func (if (calc-is-hyperbolic) 'calcFunc-clean 'calcFunc-pclean)))
198 (calc-enter-result 1 "cln"
200 (let ((n (prefix-numeric-value n)))
204 (+ n calc-internal-prec)
206 (list func (calc-top-n 1))))))))
208 (defun calc-clean-num (num)
210 (calc-clean (- (if num
211 (prefix-numeric-value num)
212 (if (and (>= last-command-event ?0)
213 (<= last-command-event ?9))
214 (- last-command-event ?0)
215 (error "Number required"))))))
218 (defvar math-chopping-small nil)
219 (defun calcFunc-clean (a &optional prec) ; [X X S] [Public]
221 (cond ((Math-messy-integerp prec)
222 (calcFunc-clean a (math-trunc prec)))
223 ((or (not (integerp prec))
225 (calc-record-why "*Precision must be an integer 3 or above")
226 (list 'calcFunc-clean a prec))
227 ((not (Math-objvecp a))
228 (list 'calcFunc-clean a prec))
229 (t (let ((calc-internal-prec prec)
230 (math-chopping-small t))
231 (calcFunc-clean (math-normalize a)))))
232 (cond ((eq (car-safe a) 'polar)
233 (let ((theta (math-mod (nth 2 a)
234 (if (eq calc-angle-mode 'rad)
241 (calcFunc-clean (nth 1 a))
242 (calcFunc-clean theta)))))))
243 ((memq (car-safe a) '(vec date hms))
244 (cons (car a) (mapcar 'calcFunc-clean (cdr a))))
245 ((memq (car-safe a) '(cplx mod sdev intv))
246 (math-normalize (cons (car a) (mapcar 'calcFunc-clean (cdr a)))))
247 ((eq (car-safe a) 'float)
248 (if math-chopping-small
249 (if (or (> (nth 2 a) (- calc-internal-prec))
250 (Math-lessp (- calc-internal-prec) (calcFunc-xpon a)))
251 (if (and (math-num-integerp a)
252 (math-lessp (calcFunc-xpon a) calc-internal-prec))
258 ((math-infinitep a) a)
259 (t (list 'calcFunc-clean a)))))
261 (defun calcFunc-pclean (a &optional prec)
262 (math-map-over-constants (function (lambda (x) (calcFunc-clean x prec)))
265 (defun calcFunc-pfloat (a)
266 (math-map-over-constants 'math-float a))
268 (defun calcFunc-pfrac (a &optional tol)
269 (math-map-over-constants (function (lambda (x) (calcFunc-frac x tol)))
272 ;; The variable math-moc-func is local to math-map-over-constants,
273 ;; but is used by math-map-over-constants-rec, which is called by
274 ;; math-map-over-constants.
275 (defvar math-moc-func)
277 (defun math-map-over-constants (math-moc-func expr)
278 (math-map-over-constants-rec expr))
280 (defun math-map-over-constants-rec (expr)
281 (cond ((or (Math-primp expr)
282 (memq (car expr) '(intv sdev)))
283 (or (and (Math-objectp expr)
284 (funcall math-moc-func expr))
286 ((and (memq (car expr) '(^ calcFunc-subscr))
287 (eq math-moc-func 'math-float)
289 (Math-integerp (nth 2 expr)))
291 (math-map-over-constants-rec (nth 1 expr))
293 (t (cons (car expr) (mapcar 'math-map-over-constants-rec (cdr expr))))))
295 (provide 'calc-stuff)
297 ;;; calc-stuff.el ends here