lisp/ob-maxima.el

   1 ;;; ob-maxima.el --- org-babel functions for maxima evaluation
   2
   3 ;; Copyright (C) 2009-2011  Free Software Foundation, Inc.
   4
   5 ;; Author: Eric S Fraga
   6 ;;         Eric Schulte
   7 ;; Keywords: literate programming, reproducible research, maxima
   8 ;; Homepage: http://orgmode.org
   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 maxima entries.
  28 ;;
  29 ;; This differs from most standard languages in that
  30 ;;
  31 ;; 1) there is no such thing as a "session" in maxima
  32 ;;
  33 ;; 2) we are adding the "cmdline" header argument
  34
  35 ;;; Code:
  36 (require 'ob)
  37
  38 (defvar org-babel-tangle-lang-exts)
  39 (add-to-list 'org-babel-tangle-lang-exts '("maxima" . "max"))
  40
  41 (defvar org-babel-default-header-args:maxima '())
  42
  43 (defun org-babel-maxima-expand (body params)
  44   "Expand a block of Maxima code according to its header arguments."
  45   (let ((vars (mapcar #'cdr (org-babel-get-header params :var))))
  46      (mapconcat 'identity
  47                 (list
  48                  ;; graphic output
  49                  (let ((graphic-file (org-babel-maxima-graphical-output-file params)))
  50                    (if graphic-file
  51                        (format
  52                         "set_plot_option ([gnuplot_term, png]); set_plot_option ([gnuplot_out_file, %S]);"
  53                         graphic-file)
  54                      ""))
  55                  ;; variables
  56                  (mapconcat 'org-babel-maxima-var-to-maxima vars "\n")
  57                  ;; body
  58                  body
  59                  "gnuplot_close ()$")
  60                 "\n")))
  61
  62 (defun org-babel-execute:maxima (body params)
  63   "Execute a block of Maxima entries with org-babel.  This function is
  64 called by `org-babel-execute-src-block'."
  65   (message "executing Maxima source code block")
  66   (let ((result
  67          (let* ((result-params (split-string (or (cdr (assoc :results params)) "")))
  68                 (cmdline (cdr (assoc :cmdline params)))
  69                 (in-file (org-babel-temp-file "maxima-" ".max"))
  70                 (cmd (format "maxima --very-quiet -r 'batchload(%S)$' %s"
  71                              in-file cmdline)))
  72            (with-temp-file in-file (insert (org-babel-maxima-expand body params)))
  73            (message cmd)
  74            ((lambda (raw) ;; " | grep -v batch | grep -v 'replaced' | sed '/^$/d' "
  75               (mapconcat
  76                #'identity
  77                (delq nil
  78                      (mapcar (lambda (line)
  79                                (unless (or (string-match "batch" line)
  80                                            (string-match "^rat: replaced .*$" line)
  81                                            (= 0 (length line)))
  82                                  line))
  83                              (split-string raw "[\r\n]"))) "\n"))
  84             (org-babel-eval cmd "")))))
  85     (if (org-babel-maxima-graphical-output-file params)
  86         nil
  87       (if (or (member "scalar" result-params)
  88               (member "verbatim" result-params)
  89               (member "output" result-params))
  90           result
  91         (let ((tmp-file (org-babel-temp-file "maxima-res-")))
  92           (with-temp-file tmp-file (insert result))
  93           (org-babel-import-elisp-from-file tmp-file))))))
  94
  95
  96 (defun org-babel-prep-session:maxima (session params)
  97   (error "Maxima does not support sessions"))
  98
  99 (defun org-babel-maxima-var-to-maxima (pair)
 100   "Convert an elisp val into a string of maxima code specifying a var
 101 of the same value."
 102   (let ((var (car pair))
 103         (val (cdr pair)))
 104     (when (symbolp val)
 105       (setq val (symbol-name val))
 106       (when (= (length val) 1)
 107         (setq val (string-to-char val))))
 108       (format "%S: %s$" var
 109               (org-babel-maxima-elisp-to-maxima val))))
 110
 111 (defun org-babel-maxima-graphical-output-file (params)
 112   "Name of file to which maxima should send graphical output."
 113   (and (member "graphics" (cdr (assq :result-params params)))
 114        (cdr (assq :file params))))
 115
 116 (defun org-babel-maxima-elisp-to-maxima (val)
 117   "Return a string of maxima code which evaluates to VAL."
 118   (if (listp val)
 119       (concat "[" (mapconcat #'org-babel-maxima-elisp-to-maxima val ", ") "]")
 120     (format "%s" val)))
 121
 122
 123 (provide 'ob-maxima)
 124
 125
 126
 127 ;;; ob-maxima.el ends here