/libs/ob-brainfuck.el

;;; ob-brainfuck.el --- org-babel functions for brainfuck evaluation

;; Copyright (C) 2009-2012  Free Software Foundation, Inc.

;; Author: Eric Schulte and Arne Babenhauserheide
;; Keywords: literate brainfuck
;; Homepage: http://draketo.de
;; Version: 0.01

;;; License:

;; This program 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, or (at your option)
;; any later version.
;;
;; This program 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; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Commentary:

;; This code is heavily based on ob-dot.el from org-mode. Heavily
;; based as in (query-replace dot brainfuck) + some deleted lines and
;; removed options.

;;; Requirements:

;; dev-lang/bff - a brainfuck interpreter named bff

;;; Code:
(require 'ob)
(require 'ob-eval)

(defvar org-babel-default-header-args:brainfuck
  '((:results . "output") (:exports . "results"))
  "Default arguments to use when evaluating a brainfuck source block.")

(defun org-babel-expand-body:brainfuck (body params)
  "Expand BODY according to PARAMS, return the expanded body."
  (let ((vars (mapcar #'cdr (org-babel-get-header params :var))))
    (mapc
     (lambda (pair)
       (let ((name (symbol-name (car pair)))
	     (value (cdr pair)))
	 (setq body
	       (replace-regexp-in-string
		(concat "\$" (regexp-quote name))
		(if (stringp value) value (format "%S" value))
		body))))
     vars)
    body))

(defun org-babel-execute:brainfuck (body params)
  "Execute a block of Brainfuck code with org-babel.
This function is called by `org-babel-execute-src-block'."
  (let* ((result-params (cdr (assoc :result-params params)))
	 (cmd (or (cdr (assoc :cmd params)) "bff"))
	 (in-file (org-babel-temp-file "brainfuck-")))
    (with-temp-file in-file
      (insert (org-babel-expand-body:brainfuck body params)))
    (org-babel-eval
     (concat cmd
	     " " (org-babel-process-file-name in-file)) "")))

(defun org-babel-prep-session:brainfuck (session params)
  "Return an error because Brainfuck does not support sessions."
  (error "Brainfuck does not support sessions"))

(provide 'ob-brainfuck)
;;; ob-brainfuck.el ends here