If size of input to encode is larger than this limit,
external encoder is called."
:group 'base64
- :type 'integer)
+ :type '(choice (const :tag "Always use internal encoder" nil)
+ (integer :tag "Size")))
-(defcustom base64-internal-decoding-limit 1000
+(defcustom base64-internal-decoding-limit (if (and (featurep 'xemacs)
+ (featurep 'mule))
+ 1000
+ 7600)
"*limit size to use internal base64 decoder.
If size of input to decode is larger than this limit,
external decoder is called."
:group 'base64
- :type 'integer)
-
-
-;;; @ internal base64 decoder
-;;;
-
-(defconst base64-numbers
- [nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil
- nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil nil
- nil nil nil nil nil nil nil nil nil nil nil 62 nil nil nil 63
- 52 53 54 55 56 57 58 59 60 61 nil nil nil nil nil nil
- nil 0 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 nil nil nil nil nil
- nil 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])
-
-(defmacro base64-char-to-num (c)
- `(aref base64-numbers ,c))
-
-(defsubst base64-internal-decode (string buffer)
- (let* ((len (length string))
- (i 0)
- (j 0)
- v1 v2 v3)
- (catch 'tag
- (while (< i len)
- (when (prog1 (setq v1 (base64-char-to-num (aref string i)))
- (setq i (1+ i)))
- (setq v2 (base64-char-to-num (aref string i))
- i (1+ i)
- v3 (base64-char-to-num (aref string i))
- i (1+ i))
- (aset buffer j (logior (lsh v1 2)(lsh v2 -4)))
- (setq j (1+ j))
- (if v3
- (let ((v4 (base64-char-to-num (aref string i))))
- (setq i (1+ i))
- (aset buffer j (logior (lsh (logand v2 15) 4)(lsh v3 -2)))
- (setq j (1+ j))
- (if v4
- (aset buffer (prog1 j (setq j (1+ j)))
- (logior (logand (lsh (logand v3 15) 6) 255)
- v4))
- (throw 'tag nil)
- ))
- (throw 'tag nil)
- ))))
- (substring buffer 0 j)
- ))
-
-(defun base64-internal-decode-string (string)
- (base64-internal-decode string (make-string (length string) 0)))
-
-(defsubst base64-internal-decode-string! (string)
- (base64-internal-decode string string))
-
-(defun base64-internal-decode-region (beg end)
- (save-excursion
- (let ((str (buffer-substring beg end)))
- (delete-region beg end)
- (goto-char beg)
- (insert (base64-internal-decode-string! str)))))
+ :type '(choice (const :tag "Always use internal decoder" nil)
+ (integer :tag "Size")))
;;; @ internal base64 encoder
;;; based on base64 decoder by Enami Tsugutomo
-(defun base64-num-to-char (n)
- (cond ((eq n nil) ?=)
- ((< n 26) (+ ?A n))
- ((< n 52) (+ ?a (- n 26)))
- ((< n 62) (+ ?0 (- n 52)))
- ((= n 62) ?+)
- ((= n 63) ?/)
- (t (error "not a base64 integer %d" n))))
+(eval-and-compile
+ (defconst base64-characters
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/")
+ )
+
+(defmacro base64-num-to-char (n)
+ `(aref base64-characters ,n))
(defun base64-encode-1 (pack)
(let ((a (car pack))
)))
-;;; @ base64 encoder/decoder for region
+;;; @ internal base64 decoder
+;;;
+
+(defconst base64-numbers
+ (eval-when-compile
+ (let ((len (length base64-characters))
+ (vec (make-vector 123 nil))
+ (i 0))
+ (while (< i len)
+ (aset vec (aref base64-characters i) i)
+ (setq i (1+ i)))
+ vec)))
+
+(defmacro base64-char-to-num (c)
+ `(aref base64-numbers ,c))
+
+(defsubst base64-internal-decode (string buffer)
+ (let* ((len (length string))
+ (i 0)
+ (j 0)
+ v1 v2 v3)
+ (catch 'tag
+ (while (< i len)
+ (when (prog1 (setq v1 (base64-char-to-num (aref string i)))
+ (setq i (1+ i)))
+ (setq v2 (base64-char-to-num (aref string i))
+ i (1+ i)
+ v3 (base64-char-to-num (aref string i))
+ i (1+ i))
+ (aset buffer j (logior (lsh v1 2)(lsh v2 -4)))
+ (setq j (1+ j))
+ (if v3
+ (let ((v4 (base64-char-to-num (aref string i))))
+ (setq i (1+ i))
+ (aset buffer j (logior (lsh (logand v2 15) 4)(lsh v3 -2)))
+ (setq j (1+ j))
+ (if v4
+ (aset buffer (prog1 j (setq j (1+ j)))
+ (logior (lsh (logand v3 3) 6) v4))
+ (throw 'tag nil)
+ ))
+ (throw 'tag nil)
+ ))))
+ (substring buffer 0 j)
+ ))
+
+(defun base64-internal-decode-string (string)
+ (base64-internal-decode string (make-string (length string) 0)))
+
+;; (defsubst base64-decode-string! (string)
+;; (setq string (string-as-unibyte string))
+;; (base64-internal-decode string string))
+
+(defun base64-internal-decode-region (beg end)
+ (save-excursion
+ (let ((str (string-as-unibyte (buffer-substring beg end))))
+ (delete-region beg end)
+ (goto-char beg)
+ (insert (base64-internal-decode str str)))))
+
+;; (defun base64-internal-decode-region2 (beg end)
+;; (save-excursion
+;; (let ((str (buffer-substring beg end)))
+;; (delete-region beg end)
+;; (goto-char beg)
+;; (insert (base64-decode-string! str)))))
+
+;; (defun base64-internal-decode-region3 (beg end)
+;; (save-excursion
+;; (let ((str (buffer-substring beg end)))
+;; (delete-region beg end)
+;; (goto-char beg)
+;; (insert (base64-internal-decode-string str)))))
+
+
+;;; @ external encoder/decoder
;;;
(defun base64-external-encode-region (beg end)
(buffer-string)))
+;;; @ application interfaces
+;;;
+
(defun base64-encode-region (start end)
"Encode current region by base64.
START and END are buffer positions.
(base64-internal-decode-string string)))
-;;; @ base64 encoder/decoder for file
-;;;
+(mel-define-method-function (mime-encode-string string (nil "base64"))
+ 'base64-encode-string)
+(mel-define-method-function (mime-decode-string string (nil "base64"))
+ 'base64-decode-string)
+(mel-define-method-function (mime-encode-region start end (nil "base64"))
+ 'base64-encode-region)
+(mel-define-method-function (mime-decode-region start end (nil "base64"))
+ 'base64-decode-region)
+
+(mel-define-method-function (encoded-text-encode-string string (nil "B"))
+ 'base64-encode-string)
+
+(mel-define-method encoded-text-decode-string (string (nil "B"))
+ (if (and (string-match B-encoded-text-regexp string)
+ (string= string (match-string 0 string)))
+ (base64-decode-string string)
+ (error "Invalid encoded-text %s" string)))
(defun base64-insert-encoded-file (filename)
"Encode contents of file FILENAME to base64, and insert the result.
(insert
(base64-encode-string
(with-temp-buffer
+ (set-buffer-multibyte nil)
(insert-file-contents-as-binary filename)
(buffer-string))))
(or (bolp)
(insert "\n"))
))
+(mel-define-method-function (mime-insert-encoded-file filename (nil "base64"))
+ 'base64-insert-encoded-file)
+
(defun base64-write-decoded-region (start end filename)
"Decode and write current region encoded by base64 into FILENAME.
START and END are buffer positions."
(let ((str (buffer-substring start end)))
(with-temp-buffer
(insert (base64-internal-decode-string str))
- (write-region-as-binary (point-min) (point-max) filename)))))
+ (write-region-as-binary (point-min) (point-max) filename)
+ ))))
+
+(mel-define-method-function
+ (mime-write-decoded-region start end filename (nil "base64"))
+ 'base64-write-decoded-region)
+
;;; @ etc
;;;
-(defun base64-encoded-length (string)
- (let ((len (length string)))
- (* (+ (/ len 3)
- (if (= (mod len 3) 0) 0 1)
- ) 4)
- ))
-
(defun pack-sequence (seq size)
"Split sequence SEQ into SIZE elements packs,
and return list of packs. [mel-b; tl-seq function]"
projects / elisp / flim.git / blobdiff