-;;; binhex.el -- elisp native binhex decode
-;; Copyright (c) 1998 Free Software Foundation, Inc.
+;;; binhex.el --- elisp native binhex decode
+;; Copyright (c) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
-;; Create Date: Oct 1, 1998
;; Keywords: binhex news
;; This file is part of GNU Emacs.
;;; Code:
+(autoload 'executable-find "executable")
+
(eval-when-compile (require 'cl))
-(if (not (fboundp 'char-int))
- (fset 'char-int 'identity))
+(eval-and-compile
+ (defalias 'binhex-char-int
+ (if (fboundp 'char-int)
+ 'char-int
+ 'identity)))
-(defvar binhex-decoder-program "hexbin"
- "*Non-nil value should be a string that names a uu decoder.
+(defcustom binhex-decoder-program "hexbin"
+ "*Non-nil value should be a string that names a binhex decoder.
The program should expect to read binhex data on its standard
-input and write the converted data to its standard output.")
+input and write the converted data to its standard output."
+ :type 'string
+ :group 'gnus-extract)
+
+(defcustom binhex-decoder-switches '("-d")
+ "*List of command line flags passed to the command `binhex-decoder-program'."
+ :group 'gnus-extract
+ :type '(repeat string))
-(defvar binhex-decoder-switches '("-d")
- "*List of command line flags passed to the command named by binhex-decoder-program.")
+(defcustom binhex-use-external
+ (executable-find binhex-decoder-program)
+ "*Use external binhex program."
+ :group 'gnus-extract
+ :type 'boolean)
(defconst binhex-alphabet-decoding-alist
'(( ?\! . 0) ( ?\" . 1) ( ?\# . 2) ( ?\$ . 3) ( ?\% . 4) ( ?\& . 5)
((boundp 'temporary-file-directory) temporary-file-directory)
("/tmp/")))
-(if (string-match "XEmacs" emacs-version)
- (defalias 'binhex-insert-char 'insert-char)
- (defun binhex-insert-char (char &optional count ignored buffer)
- (if (or (null buffer) (eq buffer (current-buffer)))
- (insert-char char count)
- (with-current-buffer buffer
- (insert-char char count)))))
+(eval-and-compile
+ (defalias 'binhex-insert-char
+ (if (featurep 'xemacs)
+ 'insert-char
+ (lambda (char &optional count ignored buffer)
+ "Insert COUNT copies of CHARACTER into BUFFER."
+ (if (or (null buffer) (eq buffer (current-buffer)))
+ (insert-char char count)
+ (with-current-buffer buffer
+ (insert-char char count)))))))
(defvar binhex-crc-table
[0 4129 8258 12387 16516 20645 24774 28903
(defun binhex-string-big-endian (string)
(let ((ret 0) (i 0) (len (length string)))
(while (< i len)
- (setq ret (+ (lsh ret 8) (char-int (aref string i)))
+ (setq ret (+ (lsh ret 8) (binhex-char-int (aref string i)))
i (1+ i)))
ret))
(defun binhex-string-little-endian (string)
(let ((ret 0) (i 0) (shift 0) (len (length string)))
(while (< i len)
- (setq ret (+ ret (lsh (char-int (aref string i)) shift))
+ (setq ret (+ ret (lsh (binhex-char-int (aref string i)) shift))
i (1+ i)
shift (+ shift 8)))
ret))
(let ((pos (point-min)) len)
(vector
(prog1
- (setq len (char-int (char-after pos)))
+ (setq len (binhex-char-int (char-after pos)))
(setq pos (1+ pos)))
(buffer-substring pos (setq pos (+ pos len)))
(prog1
- (setq len (char-int (char-after pos)))
+ (setq len (binhex-char-int (char-after pos)))
(setq pos (1+ pos)))
(buffer-substring pos (setq pos (+ pos 4)))
(buffer-substring pos (setq pos (+ pos 4)))
(t
(binhex-insert-char (setq binhex-last-char char) 1 ignored buffer))))
-(defun binhex-decode-region (start end &optional header-only)
- "Binhex decode region between START and END.
+;;;###autoload
+(defun binhex-decode-region-internal (start end &optional header-only)
+ "Binhex decode region between START and END without using an external program.
If HEADER-ONLY is non-nil only decode header and return filename."
(interactive "r")
(let ((work-buffer nil)
(save-excursion
(goto-char start)
(when (re-search-forward binhex-begin-line end t)
- (if (and (not (string-match "XEmacs\\|Lucid" emacs-version))
- (boundp 'enable-multibyte-characters))
- (let ((multibyte
- (default-value 'enable-multibyte-characters)))
- (setq-default enable-multibyte-characters nil)
- (setq work-buffer (generate-new-buffer " *binhex-work*"))
- (setq-default enable-multibyte-characters multibyte))
+ (let (default-enable-multibyte-characters)
(setq work-buffer (generate-new-buffer " *binhex-work*")))
- (buffer-disable-undo work-buffer)
(beginning-of-line)
(setq bits 0 counter 0)
(while tmp
(>= (buffer-size) data-fork-start)))
(progn
(binhex-verify-crc work-buffer
- 1 data-fork-start)
+ (point-min) data-fork-start)
(setq header (binhex-header work-buffer))
(if header-only (setq tmp nil counter 0))))
(setq tmp (and tmp (not (eq inputpos end)))))
(and work-buffer (kill-buffer work-buffer)))
(if header (aref header 1))))
+;;;###autoload
(defun binhex-decode-region-external (start end)
"Binhex decode region between START and END using external decoder."
(interactive "r")
(let ((cbuf (current-buffer)) firstline work-buffer status
- (file-name (concat binhex-temporary-file-directory
- (binhex-decode-region start end t)
- ".data")))
+ (file-name (expand-file-name
+ (concat (binhex-decode-region-internal start end t)
+ ".data")
+ binhex-temporary-file-directory)))
(save-excursion
(goto-char start)
(when (re-search-forward binhex-begin-line nil t)
(ignore-errors
(if file-name (delete-file file-name))))))
+;;;###autoload
+(defun binhex-decode-region (start end)
+ "Binhex decode region between START and END."
+ (interactive "r")
+ (if binhex-use-external
+ (binhex-decode-region-external start end)
+ (binhex-decode-region-internal start end)))
+
(provide 'binhex)
;;; binhex.el ends here