lisp/ob-maxima.el

   1 ;;; ob-maxima.el --- org-babel functions for maxima evaluation
   2
   3 ;; Copyright (C) 2009-2012  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 (defcustom org-babel-maxima-command
  44   (if (boundp 'maxima-command) maxima-command "maxima")
  45   "Command used to call maxima on the shell.")
  46
  47 (defun org-babel-maxima-expand (body params)
  48   "Expand a block of Maxima code according to its header arguments."
  49   (let ((vars (mapcar #'cdr (org-babel-get-header params :var))))
  50      (mapconcat 'identity
  51                 (list
  52                  ;; graphic output
  53                  (let ((graphic-file (org-babel-maxima-graphical-output-file params)))
  54                    (if graphic-file
  55                        (format
  56                         "set_plot_option ([gnuplot_term, png]); set_plot_option ([gnuplot_out_file, %S]);"
  57                         graphic-file)
  58                      ""))
  59                  ;; variables
  60                  (mapconcat 'org-babel-maxima-var-to-maxima vars "\n")
  61                  ;; body
  62                  body
  63                  "gnuplot_close ()$")
  64                 "\n")))
  65
  66 (defun org-babel-execute:maxima (body params)
  67   "Execute a block of Maxima entries with org-babel.  This function is
  68 called by `org-babel-execute-src-block'."
  69   (message "executing Maxima source code block")
  70   (let ((result-params (split-string (or (cdr (assoc :results params)) "")))
  71         (result
  72          (let* ((cmdline (cdr (assoc :cmdline params)))
  73                 (in-file (org-babel-temp-file "maxima-" ".max"))
  74                 (cmd (format "%s --very-quiet -r 'batchload(%S)$' %s"
  75                              org-babel-maxima-command in-file cmdline)))
  76            (with-temp-file in-file (insert (org-babel-maxima-expand body params)))
  77            (message cmd)
  78            ((lambda (raw) ;; " | grep -v batch | grep -v 'replaced' | sed '/^$/d' "
  79               (mapconcat
  80                #'identity
  81                (delq nil
  82                      (mapcar (lambda (line)
  83                                (unless (or (string-match "batch" line)
  84                                            (string-match "^rat: replaced .*$" line)
  85                                            (= 0 (length line)))
  86                                  line))
  87                              (split-string raw "[\r\n]"))) "\n"))
  88             (org-babel-eval cmd "")))))
  89     (if (org-babel-maxima-graphical-output-file params)
  90         nil
  91       (if (or (member "scalar" result-params)
  92               (member "verbatim" result-params)
  93               (member "output" result-params))
  94           result
  95         (let ((tmp-file (org-babel-temp-file "maxima-res-")))
  96           (with-temp-file tmp-file (insert result))
  97           (org-babel-import-elisp-from-file tmp-file))))))
  98
  99
 100 (defun org-babel-prep-session:maxima (session params)
 101   (error "Maxima does not support sessions"))
 102
 103 (defun org-babel-maxima-var-to-maxima (pair)
 104   "Convert an elisp val into a string of maxima code specifying a var
 105 of the same value."
 106   (let ((var (car pair))
 107         (val (cdr pair)))
 108     (when (symbolp val)
 109       (setq val (symbol-name val))
 110       (when (= (length val) 1)
 111         (setq val (string-to-char val))))
 112       (format "%S: %s$" var
 113               (org-babel-maxima-elisp-to-maxima val))))
 114
 115 (defun org-babel-maxima-graphical-output-file (params)
 116   "Name of file to which maxima should send graphical output."
 117   (and (member "graphics" (cdr (assq :result-params params)))
 118        (cdr (assq :file params))))
 119
 120 (defun org-babel-maxima-elisp-to-maxima (val)
 121   "Return a string of maxima code which evaluates to VAL."
 122   (if (listp val)
 123       (concat "[" (mapconcat #'org-babel-maxima-elisp-to-maxima val ", ") "]")
 124     (format "%s" val)))
 125
 126
 127 (provide 'ob-maxima)
 128
 129
 130
 131 ;;; ob-maxima.el ends here