forked from mirrors/org-mode
58f1dbccf8
Also remove blank lines before the ";;; org*el ends here" declarations. Having a "Version" header forced us to update every file when releasing a new version of Org; it also forced us to update every file when merging Org with Emacs trunk, thus cluttering the diffs between the previously merged version and the new one with useless information. Glenn Morris suggested this in emacs-devel: http://lists.gnu.org/archive/html/emacs-devel/2011-08/msg00322.html
104 lines
3.2 KiB
EmacsLisp
104 lines
3.2 KiB
EmacsLisp
;;; ob-calc.el --- org-babel functions for calc code evaluation
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;; Copyright (C) 2010-2011 Free Software Foundation, Inc
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;; Author: Eric Schulte
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;; Keywords: literate programming, reproducible research
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;; Homepage: http://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 <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Org-Babel support for evaluating calc code
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;;; Code:
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(require 'ob)
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(require 'calc)
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(require 'calc-store)
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(unless (featurep 'xemacs) (require 'calc-trail))
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(eval-when-compile (require 'ob-comint))
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(defvar org-babel-default-header-args:calc nil
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"Default arguments for evaluating an calc source block.")
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(defun org-babel-expand-body:calc (body params)
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"Expand BODY according to PARAMS, return the expanded body." body)
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(defun org-babel-execute:calc (body params)
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"Execute a block of calc code with Babel."
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(unless (get-buffer "*Calculator*")
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(save-window-excursion (calc) (calc-quit)))
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(let* ((vars (mapcar #'cdr (org-babel-get-header params :var)))
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(var-syms (mapcar #'car vars))
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(var-names (mapcar #'symbol-name var-syms)))
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(mapc
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(lambda (pair)
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(calc-push-list (list (cdr pair)))
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(calc-store-into (car pair)))
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vars)
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(mapc
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(lambda (line)
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(when (> (length line) 0)
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(cond
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;; simple variable name
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((member line var-names) (calc-recall (intern line)))
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;; stack operation
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((string= "'" (substring line 0 1))
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(funcall (lookup-key calc-mode-map (substring line 1)) nil))
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;; complex expression
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(t
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(calc-push-list
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(list ((lambda (res)
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(cond
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((numberp res) res)
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((math-read-number res) (math-read-number res))
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((listp res) (error "calc error \"%s\" on input \"%s\""
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(cadr res) line))
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(t (replace-regexp-in-string
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"'\\[" "["
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(calc-eval
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(math-evaluate-expr
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;; resolve user variables, calc built in
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;; variables are handled automatically
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;; upstream by calc
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(mapcar #'ob-calc-maybe-resolve-var
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;; parse line into calc objects
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(car (math-read-exprs line)))))))))
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(calc-eval line))))))))
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(mapcar #'org-babel-trim
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(split-string (org-babel-expand-body:calc body params) "[\n\r]"))))
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(save-excursion
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(with-current-buffer (get-buffer "*Calculator*")
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(calc-eval (calc-top 1)))))
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(defvar var-syms) ; Dynamically scoped from org-babel-execute:calc
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(defun ob-calc-maybe-resolve-var (el)
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(if (consp el)
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(if (and (equal 'var (car el)) (member (cadr el) var-syms))
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(progn
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(calc-recall (cadr el))
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(prog1 (calc-top 1)
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(calc-pop 1)))
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(mapcar #'ob-calc-maybe-resolve-var el))
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el))
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(provide 'ob-calc)
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;;; ob-calc.el ends here
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