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bc511a64f6
Most of this change is to boilerplate commentary such as license URLs. This change was prompted by ftp://ftp.gnu.org's going-away party, planned for November. Change these FTP URLs to https://ftp.gnu.org instead. Make similar changes for URLs to other organizations moving away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and fsf.org when this works, as this will further help defend against man-in-the-middle attacks (for this part I omitted the MS-DOS and MS-Windows sources and the test tarballs to keep the workload down). HTTPS is not fully working to lists.gnu.org so I left those URLs alone for now.
110 lines
3.7 KiB
EmacsLisp
110 lines
3.7 KiB
EmacsLisp
;;; ob-calc.el --- Babel Functions for Calc -*- lexical-binding: t; -*-
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;; Copyright (C) 2010-2017 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 <https://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-trail)
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(require 'calc-store)
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(declare-function calc-store-into "calc-store" (&optional var))
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(declare-function calc-recall "calc-store" (&optional var))
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(declare-function math-evaluate-expr "calc-ext" (x))
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(declare-function org-trim "org" (s &optional keep-lead))
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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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(defvar org--var-syms) ; Dynamically scoped from org-babel-execute:calc
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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 (org-babel--get-vars params))
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(org--var-syms (mapcar #'car vars))
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(var-names (mapcar #'symbol-name org--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 (let ((res (calc-eval line)))
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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 #'org-babel-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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))))))
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(mapcar #'org-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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(prog1
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(calc-eval (calc-top 1))
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(calc-pop 1)))))
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(defun org-babel-calc-maybe-resolve-var (el)
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(if (consp el)
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(if (and (eq 'var (car el)) (member (cadr el) org--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 #'org-babel-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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