1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
  ;;; obcalc.el  Babel Functions for Calc * lexicalbinding: t; *
;; Copyright (C) 20102021 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: https://orgmode.org
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; OrgBabel support for evaluating calc code
;;; Code:
(require 'ob)
(require 'orgmacs)
(require 'calc)
(require 'calctrail)
(require 'calcstore)
(declarefunction calcstoreinto "calcstore" (&optional var))
(declarefunction calcrecall "calcstore" (&optional var))
(declarefunction mathevaluateexpr "calcext" (x))
(defvar orgbabeldefaultheaderargs:calc nil
"Default arguments for evaluating a calc source block.")
(defun orgbabelexpandbody:calc (body _params)
"Expand BODY according to PARAMS, return the expanded body." body)
(defvar orgvarsyms) ; Dynamically scoped from orgbabelexecute:calc
(defun orgbabelexecute:calc (body params)
"Execute a block of calc code with Babel."
(unless (getbuffer "*Calculator*")
(savewindowexcursion (calc) (calcquit)))
(let* ((vars (orgbabelgetvars params))
(orgvarsyms (mapcar #'car vars))
(varnames (mapcar #'symbolname orgvarsyms)))
(mapc
(lambda (pair)
(calcpushlist (list (cdr pair)))
(calcstoreinto (car pair)))
vars)
(mapc
(lambda (line)
(when (> (length line) 0)
(cond
;; simple variable name
((member line varnames) (calcrecall (intern line)))
;; stack operation
((string= "'" (substring line 0 1))
(funcall (lookupkey calcmodemap (substring line 1)) nil))
;; complex expression
(t
(calcpushlist
(list (let ((res (calceval line)))
(cond
((numberp res) res)
((mathreadnumber res) (mathreadnumber res))
((listp res) (error "Calc error \"%s\" on input \"%s\""
(cadr res) line))
(t (replaceregexpinstring
"'" ""
(calceval
(mathevaluateexpr
;; resolve user variables, calc built in
;; variables are handled automatically
;; upstream by calc
(mapcar #'orgbabelcalcmayberesolvevar
;; parse line into calc objects
(car (mathreadexprs line)))))))))
))))))
(mapcar #'orgtrim
(splitstring (orgbabelexpandbody:calc body params) "[\n\r]"))))
(saveexcursion
(withcurrentbuffer (getbuffer "*Calculator*")
(prog1
(calceval (calctop 1))
(calcpop 1)))))
(defun orgbabelcalcmayberesolvevar (el)
(if (consp el)
(if (and (eq 'var (car el)) (member (cadr el) orgvarsyms))
(progn
(calcrecall (cadr el))
(prog1 (calctop 1)
(calcpop 1)))
(mapcar #'orgbabelcalcmayberesolvevar el))
el))
(provide 'obcalc)
;;; obcalc.el ends here
