/usr/share/emacs/site-lisp/idna.el is in idn 1.33-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 | ;;; idna.el --- Internationalizing Domain Names in Applications.
;; Copyright (C) 2003-2016 Simon Josefsson
;; Keywords: idna, idn, domain name, internationalization
;; This file is part of GNU Libidn.
;; 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 of the License, 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 this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; A simple wrapper around the command line "idn" utility in GNU
;; Libidn to make IDNA ToASCII and ToUnicode operations available in
;; Emacs.
;; Example:
;;
;; (idna-to-ascii "räksmörgås.gnu.org")
;; => "xn--rksmrgs-5wao1o.gnu.org"
;;
;; (idna-to-ascii "www.gnu.org")
;; => "www.gnu.org"
;;
;; (idna-to-unicode "xn--rksmrgs-5wao1o.gnu.org")
;; => "räksmörgås.gnu.org"
;;
;; (idna-to-unicode "www.gnu.org")
;; => "www.gnu.org"
;; Todo: Support AllowUnassigned and UseSTD3ASCIIRules somehow?
;; This package is useless unless your emacs has at least partial
;; support for the UTF-8 coding system.
;; Report bugs to bug-libidn@gnu.org.
;;; Code:
(defgroup idna nil
"Internationalizing Domain Names in Applications.")
(defcustom idna-program "idn"
"Name of the GNU Libidn \"idn\" application."
:type 'string
:group 'idna)
(defcustom idna-environment '("CHARSET=UTF-8")
"List of environment variable definitions prepended to `process-environment'."
:type '(repeat string)
:group 'idna)
(defcustom idna-to-ascii-parameters '("--quiet"
"--idna-to-ascii"
"--usestd3asciirules")
"Parameters passed to `idna-program' to invoke IDNA ToASCII mode."
:type '(repeat string)
:group 'idna)
(defcustom idna-to-unicode-parameters '("--quiet"
"--idna-to-unicode"
"--usestd3asciirules")
"Parameters passed `idna-program' to invoke IDNA ToUnicode mode."
:type '(repeat string)
:group 'idna)
;; Internal process handling:
(defvar idna-to-ascii-process nil
"Internal variable holding process for ToASCII.")
(defvar idna-to-ascii-response nil
"Internal variable holding response data received from ToASCII process.")
(defun idna-to-ascii-response-clear ()
(setq idna-to-ascii-response nil))
(defun idna-to-ascii-response ()
(while (and (eq (process-status idna-to-ascii-process) 'run)
(null idna-to-ascii-response))
(accept-process-output idna-to-ascii-process 1))
idna-to-ascii-response)
(defun idna-to-ascii-filter (process string)
(setq idna-to-ascii-response (concat idna-to-ascii-response string)))
(defun idna-to-ascii-process ()
(if (and idna-to-ascii-process
(eq (process-status idna-to-ascii-process) 'run))
idna-to-ascii-process
(if idna-to-ascii-process
(condition-case ()
(kill-process idna-to-ascii-process)
(error)))
(when (setq idna-to-ascii-process
(let ((process-environment (append idna-environment
process-environment)))
(apply 'start-process "idna" nil idna-program
idna-to-ascii-parameters)))
(set-process-filter idna-to-ascii-process 'idna-to-ascii-filter)
(set-process-coding-system idna-to-ascii-process 'utf-8 'utf-8)
(process-kill-without-query idna-to-ascii-process))
idna-to-ascii-process))
(defvar idna-to-unicode-process nil
"Internal variable holding process for ToASCII.")
(defvar idna-to-unicode-response nil
"Internal variable holding response data received from ToASCII process.")
(defun idna-to-unicode-response-clear ()
(setq idna-to-unicode-response nil))
(defun idna-to-unicode-response ()
(while (and (eq (process-status idna-to-unicode-process) 'run)
(null idna-to-unicode-response))
(accept-process-output idna-to-unicode-process 1))
idna-to-unicode-response)
(defun idna-to-unicode-filter (process string)
(setq idna-to-unicode-response (concat idna-to-unicode-response string)))
(defun idna-to-unicode-process ()
(if (and idna-to-unicode-process
(eq (process-status idna-to-unicode-process) 'run))
idna-to-unicode-process
(if idna-to-unicode-process
(condition-case ()
(kill-process idna-to-unicode-process)
(error)))
(when (setq idna-to-unicode-process
(let ((process-environment (append idna-environment
process-environment)))
(apply 'start-process "idna" nil idna-program
idna-to-unicode-parameters)))
(set-process-filter idna-to-unicode-process 'idna-to-unicode-filter)
(set-process-coding-system idna-to-unicode-process 'utf-8 'utf-8)
(process-kill-without-query idna-to-unicode-process))
idna-to-unicode-process))
;; IDNA Elisp API:
(defun idna-to-ascii (str)
"Returns an ASCII Compatible Encoding (ACE) of STR.
It is computed by the IDNA ToASCII operation, after converting the
input to UTF-8."
(let ((proc (idna-to-ascii-process))
string)
(if (null proc)
(error "Cannot start idn application (to-ascii)")
(idna-to-ascii-response-clear)
(process-send-string proc (concat str "\n"))
(setq string (idna-to-ascii-response))
(if (and string (string= (substring string (1- (length string))) "\n"))
(substring string 0 (1- (length string)))
string))))
(defun idna-to-unicode (str)
"Returns a possibly multibyte string after decoding STR.
It is computed by the IDNA ToUnicode operation."
(let ((proc (idna-to-unicode-process))
string)
(if (null proc)
(error "Cannot start idn application (to-unicode)")
(idna-to-unicode-response-clear)
(process-send-string proc (concat str "\n"))
(setq string (idna-to-unicode-response))
(if (and string (string= (substring string (1- (length string))) "\n"))
(substring string 0 (1- (length string)))
string))))
(defun idna-shutdown ()
"Kill the IDNA related processes."
(interactive)
(if (and idna-to-ascii-process
(eq (process-status idna-to-ascii-process) 'run))
(kill-process idna-to-ascii-process))
(if (and idna-to-unicode-process
(eq (process-status idna-to-unicode-process) 'run))
(kill-process idna-to-unicode-process)))
(provide 'idna)
;;; idna.el ends here
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