;;; ob-maxima.el --- Babel Functions for Maxima -*- lexical-binding: t; -*-
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;; Copyright (C) 2009-2018 Free Software Foundation, Inc.
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;; Author: Eric S Fraga
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;; Eric Schulte
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;; Keywords: literate programming, reproducible research, maxima
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;; Homepage: https://orgmode.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs 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 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs 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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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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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 adding the "cmdline" header argument
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;;; Code:
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(require 'ob)
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(defvar org-babel-tangle-lang-exts)
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(add-to-list 'org-babel-tangle-lang-exts '("maxima" . "max"))
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(defvar org-babel-default-header-args:maxima '())
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(defcustom org-babel-maxima-command
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(if (boundp 'maxima-command) maxima-command "maxima")
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"Command used to call maxima on the shell."
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:group 'org-babel
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:type 'string)
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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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(let ((vars (org-babel--get-vars params))
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(epilogue (cdr (assq :epilogue params)))
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(prologue (cdr (assq :prologue params))))
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(mapconcat 'identity
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(list
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;; Any code from the specified prologue at the start.
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prologue
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;; graphic output
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(let ((graphic-file (ignore-errors (org-babel-graphical-output-file params))))
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(if graphic-file
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(format
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"set_plot_option ([gnuplot_term, png]); set_plot_option ([gnuplot_out_file, %S]);"
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graphic-file)
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""))
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;; variables
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(mapconcat 'org-babel-maxima-var-to-maxima vars "\n")
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;; body
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body
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;; Any code from the specified epilogue at the end.
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epilogue
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"gnuplot_close ()$")
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"\n")))
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(defun org-babel-execute:maxima (body params)
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"Execute a block of Maxima entries with org-babel.
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This function is called by `org-babel-execute-src-block'."
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(message "executing Maxima source code block")
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(let ((result-params (split-string (or (cdr (assq :results params)) "")))
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(result
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(let* ((cmdline (or (cdr (assq :cmdline params)) ""))
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(in-file (org-babel-temp-file "maxima-" ".max"))
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(cmd (format "%s --very-quiet -r 'batchload(%S)$' %s"
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org-babel-maxima-command in-file cmdline)))
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(with-temp-file in-file (insert (org-babel-maxima-expand body params)))
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(message cmd)
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;; " | grep -v batch | grep -v 'replaced' | sed '/^$/d' "
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(let ((raw (org-babel-eval cmd "")))
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(mapconcat
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#'identity
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(delq nil
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(mapcar (lambda (line)
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(unless (or (string-match "batch" line)
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(string-match "^rat: replaced .*$" line)
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(string-match "^;;; Loading #P" 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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(if (ignore-errors (org-babel-graphical-output-file params))
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nil
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(org-babel-result-cond result-params
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result
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(let ((tmp-file (org-babel-temp-file "maxima-res-")))
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(with-temp-file tmp-file (insert result))
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(org-babel-import-elisp-from-file tmp-file))))))
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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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(defun org-babel-maxima-var-to-maxima (pair)
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"Convert an elisp val into a string of maxima code specifying a var
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of the same value."
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(let ((var (car pair))
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(val (cdr pair)))
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(when (symbolp val)
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(setq val (symbol-name val))
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(when (= (length val) 1)
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(setq val (string-to-char val))))
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(format "%S: %s$" var
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(org-babel-maxima-elisp-to-maxima val))))
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(defun org-babel-maxima-elisp-to-maxima (val)
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"Return a string of maxima code which evaluates to VAL."
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(if (listp val)
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(concat "[" (mapconcat #'org-babel-maxima-elisp-to-maxima val ", ") "]")
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(format "%s" val)))
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(provide 'ob-maxima)
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;;; ob-maxima.el ends here
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