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+;;; org-babel-maxima.el --- org-babel functions for maxima evaluation
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+
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+;; Copyright (c) 2009, 2010, 2011 Eric S Fraga, Eric Schulte
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+
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+;; Author: Eric S Fraga, Eric Schulte
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+;; Keywords: literate programming, reproducible research, maxima
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+;; Homepage: http://orgmode.org
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+;; Version: 0.01
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+
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+;;; License:
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+
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+;; This program is free software; you can redistribute it and/or modify
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+;; it under the terms of the GNU General Public License as published by
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+;; the Free Software Foundation; either version 3, or (at your option)
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+;; any later version.
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+;;
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+;; This program is distributed in the hope that it will be useful,
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+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+;; GNU General Public License for more details.
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+;;
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+;; You should have received a copy of the GNU General Public License
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+;; along with GNU Emacs; see the file COPYING. If not, write to the
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+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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+;; Boston, MA 02110-1301, USA.
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+
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+;;; Commentary:
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+
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+;; Org-Babel support for evaluating maxima entries.
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+;;
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+;; This differs from most standard languages in that
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+;;
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+;; 1) there is no such thing as a "session" in maxima
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+;;
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+;; 2) we are generally only going to return output from maxima
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+;;
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+;; 3) we are adding the "cmdline" header argument
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+;;
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+;; 4) there are no variables
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+
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+;;; Code:
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+(require 'ob)
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+
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+(defvar org-babel-default-header-args:maxima '())
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+
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+(defun org-babel-maxima-expand (body params)
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+ "Expand a block of Maxima code according to its header arguments."
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+ body)
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+
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+(defun org-babel-execute:maxima (body params)
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+ "Execute a block of Maxima entries with org-babel. This function is
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+called by `org-babel-execute-src-block'."
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+ (message "executing Maxima source code block")
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+ (let* ((result-params (split-string (or (cdr (assoc :results params)) "")))
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+ (cmdline (cdr (assoc :cmdline params)))
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+ (in-file (org-babel-temp-file "maxima-"))
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+ (cmd (format "maxima --very-quiet -r 'batchload(%S)$' %s"
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+ in-file cmdline)))
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+ (with-temp-file in-file (insert body))
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+ (message cmd)
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+ ((lambda (raw) ;; " | grep -v batch | grep -v 'replaced' | sed '/^$/d' "
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+ (mapconcat
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+ #'identity
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+ (delq nil
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+ (mapcar (lambda (line)
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+ (unless (or (string-match "batch" line)
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+ (string-match "^rat: replaced .*$" line)
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+ (= 0 (length line)))
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+ line))
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+ (split-string raw "[\r\n]"))) "\n"))
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+ (org-babel-eval cmd ""))))
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+
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+(defun org-babel-prep-session:maxima (session params)
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+ (error "Maxima does not support sessions"))
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+
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+(provide 'ob-maxima)
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+
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+;; arch-tag: d86c97ac-7eab-4349-8d8b-302dd09779a8
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+
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+;;; org-babel-maxima.el ends here
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Eric Schulte