1 ;;; riece-coding.el --- converting string with coding system
2 ;; Copyright (C) 1998-2003 Daiki Ueno
4 ;; Author: Daiki Ueno <ueno@unixuser.org>
6 ;; Keywords: IRC, riece, coding-system, MULE
8 ;; This file is part of Riece.
10 ;; This program is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
15 ;; This program is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 ;; Boston, MA 02110-1301, USA.
27 (require 'riece-globals)
29 (defgroup riece-coding nil
35 (defcustom riece-default-coding-system
37 (cons 'ctext 'iso-2022-jp-2))
38 "Coding system for process I/O.
39 The value is a coding system, or a cons cell (DECODING . ENCODING)
40 specifying the coding systems for decoding and encoding respectively."
41 :type '(choice (symbol :tag "Coding system")
42 (cons (symbol :tag "Input coding system")
43 (symbol :tag "Output coding system"))
44 (const nil :tag "No conversion"))
47 (defun riece-encode-coding-string (string)
48 (if (and (local-variable-p 'riece-coding-system (current-buffer))
49 riece-coding-system) ;should be nil on non-Mule environment
50 (if (consp riece-coding-system)
51 (encode-coding-string string (cdr riece-coding-system))
52 (encode-coding-string string riece-coding-system))
55 (defun riece-decode-coding-string (string)
56 (if (and (local-variable-p 'riece-coding-system (current-buffer))
57 riece-coding-system) ;should be nil on non-Mule environment
58 (riece-decode-coding-string-1 string
59 (if (consp riece-coding-system)
60 (car riece-coding-system)
64 (defun riece-decode-coding-string-1 (string coding-system)
65 (let* ((decoded (decode-coding-string string coding-system))
66 (length (length decoded)))
67 (put-text-property 0 length 'riece-decoded-encoded-string
69 (put-text-property 0 length 'riece-decoded-coding-system
70 coding-system decoded)
73 ;; The following functions are API used by handler functions. For the
74 ;; meantime DECODED is actually a string (with some text properties).
75 ;; In the future, however, the implementation _should_ be changed so
76 ;; that decoding phase is delayed until the body of handler functions.
77 (defun riece-decoded-coding-system (decoded)
78 "Return the coding-system used for decoding DECODED."
79 (get-text-property 0 'riece-decoded-coding-system decoded))
81 (defun riece-decoded-encoded-string (decoded)
82 "Return the string before decoding."
83 (get-text-property 0 'riece-decoded-encoded-string decoded))
85 (defalias 'riece-decoded-string 'identity)
87 (provide 'riece-coding)
89 ;;; riece-coding.el ends here