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;;; ob-maxima.el --- org-babel functions for maxima evaluation
;; Copyright (C) 2009-2012 Free Software Foundation, Inc.
;; Author: Eric S Fraga
;; Eric Schulte
;; Keywords: literate programming, reproducible research, maxima
;; Homepage: http://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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Org-Babel support for evaluating maxima entries.
;;
;; This differs from most standard languages in that
;;
;; 1) there is no such thing as a "session" in maxima
;;
;; 2) we are adding the "cmdline" header argument
;;; Code:
(require 'ob)
(defvar org-babel-tangle-lang-exts)
(add-to-list 'org-babel-tangle-lang-exts '("maxima" . "max"))
(defvar org-babel-default-header-args:maxima '())
(defcustom org-babel-maxima-command
(if (boundp 'maxima-command) maxima-command "maxima")
"Command used to call maxima on the shell."
:group 'org-babel)
(defun org-babel-maxima-expand (body params)
"Expand a block of Maxima code according to its header arguments."
(let ((vars (mapcar #'cdr (org-babel-get-header params :var))))
(mapconcat 'identity
(list
;; graphic output
(let ((graphic-file (org-babel-maxima-graphical-output-file params)))
(if graphic-file
(format
"set_plot_option ([gnuplot_term, png]); set_plot_option ([gnuplot_out_file, %S]);"
graphic-file)
""))
;; variables
(mapconcat 'org-babel-maxima-var-to-maxima vars "\n")
;; body
body
"gnuplot_close ()$")
"\n")))
(defun org-babel-execute:maxima (body params)
"Execute a block of Maxima entries with org-babel. This function is
called by `org-babel-execute-src-block'."
(message "executing Maxima source code block")
(let ((result-params (split-string (or (cdr (assoc :results params)) "")))
(result
(let* ((cmdline (or (cdr (assoc :cmdline params)) ""))
(in-file (org-babel-temp-file "maxima-" ".max"))
(cmd (format "%s --very-quiet -r 'batchload(%S)$' %s"
org-babel-maxima-command in-file cmdline)))
(with-temp-file in-file (insert (org-babel-maxima-expand body params)))
(message cmd)
((lambda (raw) ;; " | grep -v batch | grep -v 'replaced' | sed '/^$/d' "
(mapconcat
#'identity
(delq nil
(mapcar (lambda (line)
(unless (or (string-match "batch" line)
(string-match "^rat: replaced .*$" line)
(= 0 (length line)))
line))
(split-string raw "[\r\n]"))) "\n"))
(org-babel-eval cmd "")))))
(if (org-babel-maxima-graphical-output-file params)
nil
(if (or (member "scalar" result-params)
(member "verbatim" result-params)
(member "output" result-params))
result
(let ((tmp-file (org-babel-temp-file "maxima-res-")))
(with-temp-file tmp-file (insert result))
(org-babel-import-elisp-from-file tmp-file))))))
(defun org-babel-prep-session:maxima (session params)
(error "Maxima does not support sessions"))
(defun org-babel-maxima-var-to-maxima (pair)
"Convert an elisp val into a string of maxima code specifying a var
of the same value."
(let ((var (car pair))
(val (cdr pair)))
(when (symbolp val)
(setq val (symbol-name val))
(when (= (length val) 1)
(setq val (string-to-char val))))
(format "%S: %s$" var
(org-babel-maxima-elisp-to-maxima val))))
(defun org-babel-maxima-graphical-output-file (params)
"Name of file to which maxima should send graphical output."
(and (member "graphics" (cdr (assq :result-params params)))
(cdr (assq :file params))))
(defun org-babel-maxima-elisp-to-maxima (val)
"Return a string of maxima code which evaluates to VAL."
(if (listp val)
(concat "[" (mapconcat #'org-babel-maxima-elisp-to-maxima val ", ") "]")
(format "%s" val)))
(provide 'ob-maxima)
;;; ob-maxima.el ends here
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