diff options
Diffstat (limited to 'elpa/org-9.5.2/ob-calc.el')
| -rw-r--r-- | elpa/org-9.5.2/ob-calc.el | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/elpa/org-9.5.2/ob-calc.el b/elpa/org-9.5.2/ob-calc.el new file mode 100644 index 0000000..5962d38 --- /dev/null +++ b/elpa/org-9.5.2/ob-calc.el @@ -0,0 +1,109 @@ +;;; ob-calc.el --- Babel Functions for Calc -*- lexical-binding: t; -*- + +;; Copyright (C) 2010-2021 Free Software Foundation, Inc. + +;; Author: Eric Schulte +;; Maintainer: Tom Gillespie <tgbugs@gmail.com> +;; Keywords: literate programming, reproducible research +;; Homepage: https://orgmode.org + +;; This file is part of GNU Emacs. + +;; GNU Emacs 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 of the License, or +;; (at your option) any later version. + +;; GNU Emacs 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. If not, see <https://www.gnu.org/licenses/>. + +;;; Commentary: + +;; Org-Babel support for evaluating calc code + +;;; Code: +(require 'ob) +(require 'org-macs) +(require 'calc) +(require 'calc-trail) +(require 'calc-store) + +(declare-function calc-store-into "calc-store" (&optional var)) +(declare-function calc-recall "calc-store" (&optional var)) +(declare-function math-evaluate-expr "calc-ext" (x)) + +(defvar org-babel-default-header-args:calc nil + "Default arguments for evaluating a calc source block.") + +(defun org-babel-expand-body:calc (body _params) + "Expand BODY according to PARAMS, return the expanded body." body) + +(defvar org--var-syms) ; Dynamically scoped from org-babel-execute:calc + +(defun org-babel-execute:calc (body params) + "Execute a block of calc code with Babel." + (unless (get-buffer "*Calculator*") + (save-window-excursion (calc) (calc-quit))) + (let* ((vars (org-babel--get-vars params)) + (org--var-syms (mapcar #'car vars)) + (var-names (mapcar #'symbol-name org--var-syms))) + (mapc + (lambda (pair) + (calc-push-list (list (cdr pair))) + (calc-store-into (car pair))) + vars) + (mapc + (lambda (line) + (when (> (length line) 0) + (cond + ;; simple variable name + ((member line var-names) (calc-recall (intern line))) + ;; stack operation + ((string= "'" (substring line 0 1)) + (funcall (lookup-key calc-mode-map (substring line 1)) nil)) + ;; complex expression + (t + (calc-push-list + (list (let ((res (calc-eval line))) + (cond + ((numberp res) res) + ((math-read-number res) (math-read-number res)) + ((listp res) (error "Calc error \"%s\" on input \"%s\"" + (cadr res) line)) + (t (replace-regexp-in-string + "'" "" + (calc-eval + (math-evaluate-expr + ;; resolve user variables, calc built in + ;; variables are handled automatically + ;; upstream by calc + (mapcar #'org-babel-calc-maybe-resolve-var + ;; parse line into calc objects + (car (math-read-exprs line))))))))) + )))))) + (mapcar #'org-trim + (split-string (org-babel-expand-body:calc body params) "[\n\r]")))) + (save-excursion + (with-current-buffer (get-buffer "*Calculator*") + (prog1 + (calc-eval (calc-top 1)) + (calc-pop 1))))) + +(defun org-babel-calc-maybe-resolve-var (el) + (if (consp el) + (if (and (eq 'var (car el)) (member (cadr el) org--var-syms)) + (progn + (calc-recall (cadr el)) + (prog1 (calc-top 1) + (calc-pop 1))) + (mapcar #'org-babel-calc-maybe-resolve-var el)) + el)) + +(provide 'ob-calc) + +;;; ob-calc.el ends here |