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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.
71 lines
2.1 KiB
EmacsLisp
71 lines
2.1 KiB
EmacsLisp
;;; obarray.el --- obarray functions -*- lexical-binding: t -*-
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;; Copyright (C) 2015-2017 Free Software Foundation, Inc.
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;; Maintainer: emacs-devel@gnu.org
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;; Keywords: obarray functions
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;; Package: emacs
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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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;; This file provides function for working with obarrays.
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;;; Code:
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(defconst obarray-default-size 59
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"The value 59 is an arbitrary prime number that gives a good hash.")
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(defun obarray-make (&optional size)
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"Return a new obarray of size SIZE or `obarray-default-size'."
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(let ((size (or size obarray-default-size)))
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(if (< 0 size)
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(make-vector size 0)
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(signal 'wrong-type-argument '(size 0)))))
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(defun obarray-size (ob)
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"Return the number of slots of obarray OB."
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(length ob))
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(defun obarrayp (object)
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"Return t if OBJECT is an obarray."
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(and (vectorp object)
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(< 0 (length object))))
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;; Don’t use obarray as a variable name to avoid shadowing.
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(defun obarray-get (ob name)
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"Return symbol named NAME if it is contained in obarray OB.
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Return nil otherwise."
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(intern-soft name ob))
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(defun obarray-put (ob name)
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"Return symbol named NAME from obarray OB.
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Creates and adds the symbol if doesn't exist."
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(intern name ob))
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(defun obarray-remove (ob name)
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"Remove symbol named NAME if it is contained in obarray OB.
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Return t on success, nil otherwise."
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(unintern name ob))
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(defun obarray-map (fn ob)
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"Call function FN on every symbol in obarray OB and return nil."
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(mapatoms fn ob))
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(provide 'obarray)
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;;; obarray.el ends here
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