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1 | ;;; ob-calc.el --- org-babel functions for calc code evaluation |
2 | ||
73b0cd50 | 3 | ;; Copyright (C) 2010-2011 Free Software Foundation, Inc |
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4 | |
5 | ;; Author: Eric Schulte | |
6 | ;; Keywords: literate programming, reproducible research | |
7 | ;; Homepage: http://orgmode.org | |
acedf35c | 8 | ;; Version: 7.4 |
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9 | |
10 | ;; This file is part of GNU Emacs. | |
11 | ||
12 | ;; GNU Emacs is free software: you can redistribute it and/or modify | |
13 | ;; it under the terms of the GNU General Public License as published by | |
14 | ;; the Free Software Foundation, either version 3 of the License, or | |
15 | ;; (at your option) any later version. | |
16 | ||
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. | |
24 | ||
25 | ;;; Commentary: | |
26 | ||
27 | ;; Org-Babel support for evaluating calc code | |
28 | ||
29 | ;;; Code: | |
30 | (require 'ob) | |
31 | (require 'calc) | |
32 | (require 'calc-trail) | |
33 | (eval-when-compile (require 'ob-comint)) | |
34 | ||
35 | (defvar org-babel-default-header-args:calc nil | |
36 | "Default arguments for evaluating an calc source block.") | |
37 | ||
38 | (defun org-babel-expand-body:calc (body params) | |
39 | "Expand BODY according to PARAMS, return the expanded body." body) | |
40 | ||
41 | (defun org-babel-execute:calc (body params) | |
42 | "Execute a block of calc code with Babel." | |
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43 | (unless (get-buffer "*Calculator*") |
44 | (save-window-excursion (calc) (calc-quit))) | |
45 | (let* ((vars (mapcar #'cdr (org-babel-get-header params :var))) | |
46 | (var-syms (mapcar #'car vars)) | |
47 | (var-names (mapcar #'symbol-name var-syms))) | |
48 | (mapc | |
49 | (lambda (pair) | |
50 | (calc-push-list (list (cdr pair))) | |
51 | (calc-store-into (car pair))) | |
52 | vars) | |
53 | (mapc | |
54 | (lambda (line) | |
55 | (when (> (length line) 0) | |
56 | (cond | |
57 | ;; simple variable name | |
58 | ((member line var-names) (calc-recall (intern line))) | |
59 | ;; stack operation | |
60 | ((string= "'" (substring line 0 1)) | |
61 | (funcall (lookup-key calc-mode-map (substring line 1)) nil)) | |
62 | ;; complex expression | |
63 | (t | |
64 | (calc-push-list | |
65 | (list ((lambda (res) | |
66 | (cond | |
67 | ((numberp res) res) | |
68 | ((math-read-number res) (math-read-number res)) | |
69 | ((listp res) (error "calc error \"%s\" on input \"%s\"" | |
70 | (cadr res) line)) | |
71 | (t (calc-eval | |
72 | (math-evaluate-expr | |
73 | ;; resolve user variables, calc built in | |
74 | ;; variables are handled automatically | |
75 | ;; upstream by calc | |
76 | (mapcar (lambda (el) | |
77 | (if (and (consp el) (equal 'var (car el)) | |
78 | (member (cadr el) var-syms)) | |
79 | (progn | |
80 | (calc-recall (cadr el)) | |
81 | (prog1 (calc-top 1) | |
82 | (calc-pop 1))) | |
83 | el)) | |
84 | ;; parse line into calc objects | |
85 | (car (math-read-exprs line)))))))) | |
86 | (calc-eval line)))))))) | |
87 | (mapcar #'org-babel-trim | |
88 | (split-string (org-babel-expand-body:calc body params) "[\n\r]")))) | |
afe98dfa | 89 | (save-excursion |
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90 | (with-current-buffer (get-buffer "*Calculator*") |
91 | (calc-eval (calc-top 1))))) | |
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92 | |
93 | (provide 'ob-calc) | |
94 | ||
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95 | |
96 | ;;; ob-calc.el ends here |