;;; org-babel-lob.el --- The Library of Babel: off-the-shelf functions for data analysis and plotting using org-babel

;; Copyright (C) 2009 Dan Davison, Eric Schulte

;; Author: Dan Davison, Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org
;; 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:

;; See org-babel.org in the parent directory for more information

;;; Code:
(require 'org-babel)

(org-babel-add-interpreter "babel")

(defun org-babel-execute:babel (body params)
  "Execute a library-of-babel block.

  These blocks do not have their own body. Instead they use
  a :srcname header argument to reference a different source
  block, whose body they use. Source blocks in the library of
  babel should use a standard naming scheme for the variable
  containing the input data for analysis / plotting. E.g. if that
  variable is always called __data__ then one of these bodyless
  babel blocks will call a library of babel block using :var
  __data__=<some reference>. The header args from a babel block
  are appended to the header args from the target block.

  This function is called by `org-babel-execute-src-block'."
  (message "executing babel source code block...")
  (save-window-excursion
    (save-excursion
      (org-babel-find-named-block (cdr (assoc :srcname params))))
    (let ((block (match-string 0)))
      (search-forward "#+end_src" nil t)
      (forward-line 1)
      (insert "\n")
      (insert block)
      (beginning-of-line)
      (org-babel-execute-src-block nil nil params))))

(defun org-babel-lob-parse-buffer ()
  "Read all source-code blocks in buffer into memory."
  (save-excursion
    (goto-char (point-min))
    (let ((blocks (make-hash-table)))
      (while (re-search-forward
	      org-babel-named-src-block-regexp nil t)
	(puthash (match-string-no-properties 1)        ;; srcname
		 (list (cons :lang (match-string-no-properties 2))
		       (cons :body (match-string-no-properties 5))
		       (cons :params (match-string-no-properties 3)))
		 blocks))
      blocks)))

(provide 'org-babel-lob)