--- /dev/null
+;;; mel-ccl.el: CCL based encoder/decoder of Base64, Quoted-Printable
+;;; and Q-encoding
+
+;; Copyright (C) 1998 Tanaka Akira
+
+;; Author: Tanaka Akira <akr@jaist.ac.jp>
+;; Created: 1998/9/17
+;; Keywords: MIME, Base64, Quoted-Printable, Q-encoding
+
+;; This file is part of FLIM (Faithful Library about Internet Message).
+
+;; 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 2, 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 GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Code:
+
+(require 'ccl)
+(require 'emu)
+(require 'pccl)
+(require 'mime-def)
+
+
+;;; @ constants
+;;;
+
+(eval-when-compile
+
+(defconst mel-ccl-4-table
+ '( 0 1 2 3))
+
+(defconst mel-ccl-16-table
+ '( 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15))
+
+(defconst mel-ccl-28-table
+ '( 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 26 27))
+
+(defconst mel-ccl-64-table
+ '( 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 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))
+
+(defconst mel-ccl-256-table
+ '( 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 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
+ 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207
+ 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223
+ 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239
+ 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255))
+
+(defconst mel-ccl-256-to-16-table
+ '(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 nil nil nil nil nil
+ 0 1 2 3 4 5 6 7 8 9 nil nil nil nil nil nil
+ nil 10 11 12 13 14 15 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 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 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 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 nil nil nil nil nil nil nil nil nil nil nil nil nil))
+
+(defconst mel-ccl-16-to-256-table
+ (mapcar 'char-int "0123456789ABCDEF"))
+
+(defconst mel-ccl-high-table
+ (vconcat
+ (mapcar
+ (lambda (v) (nth (lsh v -4) mel-ccl-16-to-256-table))
+ mel-ccl-256-table)))
+
+(defconst mel-ccl-low-table
+ (vconcat
+ (mapcar
+ (lambda (v) (nth (logand v 15) mel-ccl-16-to-256-table))
+ mel-ccl-256-table)))
+
+(defconst mel-ccl-u-raw
+ (mapcar
+ 'char-int
+ "0123456789\
+ABCDEFGHIJKLMNOPQRSTUVWXYZ\
+abcdefghijklmnopqrstuvwxyz\
+!@#$%&'()*+,-./:;<>@[\\]^`{|}~"))
+
+(defconst mel-ccl-c-raw
+ (mapcar
+ 'char-int
+ "0123456789\
+ABCDEFGHIJKLMNOPQRSTUVWXYZ\
+abcdefghijklmnopqrstuvwxyz\
+!@#$%&'*+,-./:;<>@[]^`{|}~"))
+
+(defconst mel-ccl-p-raw
+ (mapcar
+ 'char-int
+ "0123456789\
+ABCDEFGHIJKLMNOPQRSTUVWXYZ\
+abcdefghijklmnopqrstuvwxyz\
+!*+-/"))
+
+(defconst mel-ccl-256-to-64-table
+ '(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 t 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 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 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 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 nil nil nil nil))
+
+(defconst mel-ccl-64-to-256-table
+ (mapcar
+ 'char-int
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ\
+abcdefghijklmnopqrstuvwxyz\
+0123456789\
++/"))
+
+(defconst mel-ccl-qp-table
+ [enc enc enc enc enc enc enc enc enc wsp lf enc enc cr enc enc
+ enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc
+ wsp raw raw raw raw raw raw raw raw raw raw raw raw raw raw raw
+ raw raw raw raw raw raw raw raw raw raw raw raw raw enc raw raw
+ raw raw raw raw raw raw raw raw raw raw raw raw raw raw raw raw
+ raw raw raw raw raw raw raw raw raw raw raw raw raw raw raw raw
+ raw raw raw raw raw raw raw raw raw raw raw raw raw raw raw raw
+ raw raw raw raw raw raw raw raw raw raw raw raw raw raw raw enc
+ enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc
+ enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc
+ enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc
+ enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc
+ enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc
+ enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc
+ enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc
+ enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc enc])
+
+)
+
+
+;;; @ CCL programs
+;;;
+
+;;; Q
+
+(define-ccl-program mel-ccl-decode-q
+ `(1
+ ((loop
+ (read-branch
+ r0
+ ,@(mapcar
+ (lambda (r0)
+ (cond
+ ((= r0 (char-int ?_))
+ `(write-repeat ? ))
+ ((= r0 (char-int ?=))
+ `((loop
+ (read-branch
+ r1
+ ,@(mapcar
+ (lambda (v)
+ (if (integerp v)
+ `((r0 = ,v) (break))
+ '(repeat)))
+ mel-ccl-256-to-16-table)))
+ (loop
+ (read-branch
+ r1
+ ,@(mapcar
+ (lambda (v)
+ (if (integerp v)
+ `((write r0 ,(vconcat
+ (mapcar
+ (lambda (r0)
+ (logior (lsh r0 4) v))
+ mel-ccl-16-table)))
+ (break))
+ '(repeat)))
+ mel-ccl-256-to-16-table)))
+ (repeat)))
+ (t
+ `(write-repeat ,r0))))
+ mel-ccl-256-table))))))
+
+(eval-when-compile
+
+(defun mel-ccl-encode-q-generic (raw)
+ `(3
+ (loop
+ (loop
+ (read-branch
+ r0
+ ,@(mapcar
+ (lambda (r0)
+ (cond
+ ((= r0 32) `(write-repeat ?_))
+ ((member r0 raw) `(write-repeat ,r0))
+ (t '(break))))
+ mel-ccl-256-table)))
+ (write ?=)
+ (write r0 ,mel-ccl-high-table)
+ (write r0 ,mel-ccl-low-table)
+ (repeat))))
+
+;; On xemacs, generated program counts iso-8859-1 8bit character as 6bytes.
+(defun mel-ccl-count-q-length (raw)
+ `(0
+ ((r0 = 0)
+ (loop
+ (read-branch
+ r1
+ ,@(mapcar
+ (lambda (r1)
+ (if (or (= r1 32) (member r1 raw))
+ '((r0 += 1) (repeat))
+ '((r0 += 3) (repeat))))
+ mel-ccl-256-table))))))
+
+)
+
+(define-ccl-program mel-ccl-encode-uq
+ (mel-ccl-encode-q-generic mel-ccl-u-raw))
+(define-ccl-program mel-ccl-encode-cq
+ (mel-ccl-encode-q-generic mel-ccl-c-raw))
+(define-ccl-program mel-ccl-encode-pq
+ (mel-ccl-encode-q-generic mel-ccl-p-raw))
+
+(define-ccl-program mel-ccl-count-uq
+ (mel-ccl-count-q-length mel-ccl-u-raw))
+(define-ccl-program mel-ccl-count-cq
+ (mel-ccl-count-q-length mel-ccl-c-raw))
+(define-ccl-program mel-ccl-count-pq
+ (mel-ccl-count-q-length mel-ccl-p-raw))
+
+;;; B/Base64
+
+(eval-when-compile
+
+(defun mel-ccl-decode-b-bit-ex (v)
+ (logior
+ (lsh (logand v (lsh 255 16)) -16)
+ (logand v (lsh 255 8))
+ (lsh (logand v 255) 16)))
+
+(defconst mel-ccl-decode-b-0-table
+ (vconcat
+ (mapcar
+ (lambda (v)
+ (if (integerp v)
+ (mel-ccl-decode-b-bit-ex (lsh v 18))
+ (lsh 1 24)))
+ mel-ccl-256-to-64-table)))
+
+(defconst mel-ccl-decode-b-1-table
+ (vconcat
+ (mapcar
+ (lambda (v)
+ (if (integerp v)
+ (mel-ccl-decode-b-bit-ex (lsh v 12))
+ (lsh 1 25)))
+ mel-ccl-256-to-64-table)))
+
+(defconst mel-ccl-decode-b-2-table
+ (vconcat
+ (mapcar
+ (lambda (v)
+ (if (integerp v)
+ (mel-ccl-decode-b-bit-ex (lsh v 6))
+ (lsh 1 26)))
+ mel-ccl-256-to-64-table)))
+
+(defconst mel-ccl-decode-b-3-table
+ (vconcat
+ (mapcar
+ (lambda (v)
+ (if (integerp v)
+ (mel-ccl-decode-b-bit-ex v)
+ (lsh 1 27)))
+ mel-ccl-256-to-64-table)))
+
+)
+
+(define-ccl-program mel-ccl-decode-b
+ `(1
+ (loop
+ (read r0 r1 r2 r3)
+ (r4 = r0 ,mel-ccl-decode-b-0-table)
+ (r5 = r1 ,mel-ccl-decode-b-1-table)
+ (r4 |= r5)
+ (r5 = r2 ,mel-ccl-decode-b-2-table)
+ (r4 |= r5)
+ (r5 = r3 ,mel-ccl-decode-b-3-table)
+ (r4 |= r5)
+ (if (r4 & ,(lognot (1- (lsh 1 24))))
+ ((loop
+ (if (r4 & ,(lsh 1 24))
+ ((r0 = r1) (r1 = r2) (r2 = r3) (read r3)
+ (r4 >>= 1) (r4 &= ,(logior (lsh 7 24)))
+ (r5 = r3 ,mel-ccl-decode-b-3-table)
+ (r4 |= r5)
+ (repeat))
+ (break)))
+ (loop
+ (if (r4 & ,(lsh 1 25))
+ ((r1 = r2) (r2 = r3) (read r3)
+ (r4 >>= 1) (r4 &= ,(logior (lsh 7 24)))
+ (r5 = r3 ,mel-ccl-decode-b-3-table)
+ (r4 |= r5)
+ (repeat))
+ (break)))
+ (loop
+ (if (r2 != ?=)
+ (if (r4 & ,(lsh 1 26))
+ ((r2 = r3) (read r3)
+ (r4 >>= 1) (r4 &= ,(logior (lsh 7 24)))
+ (r5 = r3 ,mel-ccl-decode-b-3-table)
+ (r4 |= r5)
+ (repeat))
+ ((r6 = 0)
+ (break)))
+ ((r6 = 1)
+ (break))))
+ (loop
+ (if (r3 != ?=)
+ (if (r4 & ,(lsh 1 27))
+ ((read r3)
+ (r4 = r3 ,mel-ccl-decode-b-3-table)
+ (repeat))
+ (break))
+ ((r6 |= 2)
+ (break))))
+ (r4 = r0 ,mel-ccl-decode-b-0-table)
+ (r5 = r1 ,mel-ccl-decode-b-1-table)
+ (r4 |= r5)
+ (branch
+ r6
+ ;; BBBB
+ ((r5 = r2 ,mel-ccl-decode-b-2-table)
+ (r4 |= r5)
+ (r5 = r3 ,mel-ccl-decode-b-3-table)
+ (r4 |= r5)
+ (r4 >8= 0)
+ (write r7)
+ (r4 >8= 0)
+ (write r7)
+ (write-repeat r4))
+ ;; error: BB=B
+ ((write (r4 & 255))
+ (end))
+ ;; BBB=
+ ((r5 = r2 ,mel-ccl-decode-b-2-table)
+ (r4 |= r5)
+ (r4 >8= 0)
+ (write r7)
+ (write (r4 & 255))
+ (end) ; Excessive (end) is workaround for XEmacs 21.0.
+ ; Without this, "AAA=" is converted to "^@^@^@".
+ (end))
+ ;; BB==
+ ((write (r4 & 255))
+ (end))))
+ ((r4 >8= 0)
+ (write r7)
+ (r4 >8= 0)
+ (write r7)
+ (write-repeat r4))))))
+
+(eval-when-compile
+
+;; Generated CCL program works not properly on 20.2 because CCL_EOF_BLOCK
+;; is not executed.
+(defun mel-ccl-encode-base64-generic (&optional quantums-per-line output-crlf terminate-with-newline)
+ `(2
+ ((r3 = 0)
+ (loop
+ (r2 = 0)
+ (read-branch
+ r1
+ ,@(mapcar
+ (lambda (r1)
+ `((write ,(nth (lsh r1 -2) mel-ccl-64-to-256-table))
+ (r0 = ,(logand r1 3))))
+ mel-ccl-256-table))
+ (r2 = 1)
+ (read-branch
+ r1
+ ,@(mapcar
+ (lambda (r1)
+ `((write r0 ,(vconcat
+ (mapcar
+ (lambda (r0)
+ (nth (logior (lsh r0 4)
+ (lsh r1 -4))
+ mel-ccl-64-to-256-table))
+ mel-ccl-4-table)))
+ (r0 = ,(logand r1 15))))
+ mel-ccl-256-table))
+ (r2 = 2)
+ (read-branch
+ r1
+ ,@(mapcar
+ (lambda (r1)
+ `((write r0 ,(vconcat
+ (mapcar
+ (lambda (r0)
+ (nth (logior (lsh r0 2)
+ (lsh r1 -6))
+ mel-ccl-64-to-256-table))
+ mel-ccl-16-table)))))
+ mel-ccl-256-table))
+ (r1 &= 63)
+ (write r1 ,(vconcat
+ (mapcar
+ (lambda (r1)
+ (nth r1 mel-ccl-64-to-256-table))
+ mel-ccl-64-table)))
+ (r3 += 1)
+ ,@(when quantums-per-line
+ `((if (r3 == ,quantums-per-line)
+ ((write ,(if output-crlf "\r\n" "\n"))
+ (r3 = 0)))))
+ (repeat)))
+ (branch
+ r2
+ ,(if terminate-with-newline
+ `(if (r3 > 0) (write ,(if output-crlf "\r\n" "\n")))
+ `(r0 = 0))
+ ((write r0 ,(vconcat
+ (mapcar
+ (lambda (r0)
+ (nth (lsh r0 4) mel-ccl-64-to-256-table))
+ mel-ccl-4-table)))
+ (write ,(if terminate-with-newline
+ (if output-crlf "==\r\n" "==\n")
+ "==")))
+ ((write r0 ,(vconcat
+ (mapcar
+ (lambda (r0)
+ (nth (lsh r0 2) mel-ccl-64-to-256-table))
+ mel-ccl-16-table)))
+ (write ,(if terminate-with-newline
+ (if output-crlf "=\r\n" "=\n")
+ "="))))
+ ))
+)
+
+(define-ccl-program mel-ccl-encode-b
+ (mel-ccl-encode-base64-generic))
+
+;; 19 * 4 = 76
+(define-ccl-program mel-ccl-encode-base64-crlf-crlf
+ (mel-ccl-encode-base64-generic 19 t))
+
+(define-ccl-program mel-ccl-encode-base64-crlf-lf
+ (mel-ccl-encode-base64-generic 19 nil))
+
+;; Quoted-Printable
+
+(eval-when-compile
+
+(defun mel-ccl-try-to-read-crlf (input-crlf reg eof-reg cr-eof lf-eof crlf-eof succ fail-cr fail-lf fail-crlf)
+ (if input-crlf
+ `((,eof-reg = ,cr-eof) (read-if (,reg == ?\r)
+ ((,eof-reg = ,lf-eof) (read-if (,reg == ?\n)
+ ,succ
+ ,fail-lf))
+ ,fail-cr))
+ `((,eof-reg = ,crlf-eof) (read-if (,reg == ?\n)
+ ,succ
+ ,fail-crlf))))
+
+;; Generated CCL program works not properly on 20.2 because CCL_EOF_BLOCK
+;; is not executed.
+(defun mel-ccl-encode-quoted-printable-generic (input-crlf output-crlf)
+ `(4
+ ((r6 = 0) ; column
+ (r5 = 0) ; previous character is white space
+ (r4 = 0)
+ (read r0)
+ (loop ; r6 <= 75
+ (loop
+ (loop
+ (branch
+ r0
+ ,@(mapcar
+ (lambda (r0)
+ (let ((tmp (aref mel-ccl-qp-table r0)))
+ (cond
+ ((eq r0 (char-int ?F))
+ `(if (r6 == 0)
+ ((r4 = 15) (read-if (r0 == ?r)
+ ((r4 = 16) (read-if (r0 == ?o)
+ ((r4 = 17) (read-if (r0 == ?m)
+ ((r4 = 18) (read-if (r0 == ? )
+ ((r6 = 7)
+ (r5 = 1)
+ (write "=46rom ")
+ (r4 = 19)
+ (read r0)
+ (repeat))
+ ((r6 = 4)
+ (write-repeat "From"))))
+ ((r6 = 3)
+ (write-repeat "Fro"))))
+ ((r6 = 2)
+ (write-repeat "Fr"))))
+ ((r6 = 1)
+ (write-repeat "F"))))
+ ((r3 = 0) (break)) ; RAW
+ ))
+ ((eq r0 (char-int ?.))
+ `(if (r6 == 0)
+ ,(mel-ccl-try-to-read-crlf
+ input-crlf
+ 'r0 'r4 20 21 22
+ `((write ,(if output-crlf "=2E\r\n" "=2E\n"))
+ (r4 = 23)
+ (read r0)
+ (repeat))
+ '((r6 = 1)
+ (write-repeat "."))
+ '((r6 = 4)
+ (write-repeat ".=0D"))
+ '((r6 = 1)
+ (write-repeat ".")))
+ ((r3 = 0) (break)) ; RAW
+ ))
+ ((eq tmp 'raw) '((r3 = 0) (break))) ; RAW
+ ((eq tmp 'enc) '((r3 = 1) (break))) ; ENC
+ ((eq tmp 'wsp) '((r3 = 2) (break))) ; WSP
+ ((eq tmp 'cr) (if input-crlf
+ '((r3 = 3) (break)) ; CR
+ '((r3 = 1) (break)))) ; ENC
+ ((eq tmp 'lf) (if input-crlf
+ '((r3 = 1) (break)) ; ENC
+ '((r3 = 3) (break)))) ; CRLF
+ )))
+ mel-ccl-256-table)))
+ (branch
+ r3
+ ;; r0:r3=RAW
+ (if (r6 < 75)
+ ((r6 += 1)
+ (r5 = 0)
+ (r4 = 1)
+ (write-read-repeat r0))
+ (break))
+ ;; r0:r3=ENC
+ ((r5 = 0)
+ (if (r6 < 73)
+ ((r6 += 3)
+ (write "=")
+ (write r0 ,mel-ccl-high-table)
+ (r4 = 2)
+ (write-read-repeat r0 ,mel-ccl-low-table))
+ (if (r6 > 73)
+ ((r6 = 3)
+ (write ,(if output-crlf "=\r\n=" "=\n="))
+ (write r0 ,mel-ccl-high-table)
+ (r4 = 3)
+ (write-read-repeat r0 ,mel-ccl-low-table))
+ (break))))
+ ;; r0:r3=WSP
+ ((r5 = 1)
+ (if (r6 < 75)
+ ((r6 += 1)
+ (r4 = 4)
+ (write-read-repeat r0))
+ ((r6 = 1)
+ (write ,(if output-crlf "=\r\n" "=\n"))
+ (r4 = 5)
+ (write-read-repeat r0))))
+ ;; r0:r3=CR/CRLF
+ ,(if input-crlf
+ ;; r0:r3=CR
+ `((if ((r6 > 73) & r5)
+ ((r6 = 0)
+ (r5 = 0)
+ (write ,(if output-crlf "=\r\n" "=\n"))))
+ (break))
+ ;; r0:r3=CRLF
+ `(if r5
+ ;; WSP ; r0:r3=CRLF
+ ((r5 = 0)
+ (r6 = 0)
+ (write ,(if output-crlf "=\r\n" "=\n"))
+ ,@(if output-crlf '((write ?\r)) '())
+ (r4 = 0)
+ (write-read-repeat r0))
+ ;; noWSP ; r0:r3=CRLF
+ ((r5 = 0)
+ (r6 = 0)
+ ,@(if output-crlf '((write ?\r)) '())
+ (r4 = 0)
+ (write-read-repeat r0)))
+ )))
+ ;; r0:r3={RAW,ENC,CR}
+ (loop
+ ,(funcall
+ (lambda (after-cr after-raw-enc)
+ (if input-crlf
+ `(if (r0 == ?\r)
+ ,after-cr
+ ,after-raw-enc)
+ after-raw-enc))
+ ;; r0=\r:r3=CR
+ `((r4 = 6)
+ (read r0)
+ ;; CR:r3=CR r0
+ (if (r0 == ?\n)
+ ;; CR:r3=CR r0=LF
+ (if r5
+ ;; r5=WSP ; CR:r3=CR r0=LF
+ ((r6 = 0)
+ (r5 = 0)
+ (write ,(if output-crlf "=\r\n\r\n" "=\n\n"))
+ (r4 = 7)
+ (read r0)
+ (break))
+ ;; r5=noWSP ; CR:r3=CR r0=LF
+ ((r6 = 0)
+ (r5 = 0)
+ (write ,(if output-crlf "\r\n" "\n"))
+ (r4 = 8)
+ (read r0)
+ (break)))
+ ;; CR:r3=CR r0=noLF
+ (if (r6 < 73)
+ ((r6 += 3)
+ (r5 = 0)
+ (write "=0D")
+ (break))
+ (if (r6 == 73)
+ (if (r0 == ?\r)
+ ;; CR:r3=CR r0=CR
+ ((r4 = 9)
+ (read r0)
+ ;; CR:r3=CR CR r0
+ (if (r0 == ?\n)
+ ;; CR:r3=CR CR LF
+ ((r6 = 0)
+ (r5 = 0)
+ (write ,(if output-crlf "=0D\r\n" "=0D\n"))
+ (r4 = 10)
+ (read r0)
+ (break))
+ ;; CR:r3=CR CR noLF
+ ((r6 = 6)
+ (r5 = 0)
+ (write ,(if output-crlf "=\r\n=0D=0D" "=\n=0D=0D"))
+ (break))))
+ ;; CR:r3=CR r0=noLFnorCR
+ ((r6 = 3)
+ (r5 = 0)
+ (write ,(if output-crlf "=\r\n=0D" "=\n=0D"))
+ (break)))
+ ((r6 = 3)
+ (r5 = 0)
+ (write ,(if output-crlf "=\r\n=0D" "=\n=0D"))
+ (break))))))
+ (funcall
+ (lambda (after-newline after-cr-nolf after-nonewline)
+ (if input-crlf
+ ;; r0:r3={RAW,ENC}
+ `((r4 = 11)
+ (read r1)
+ ;; r0:r3={RAW,ENC} r1
+ (if (r1 == ?\r)
+ ;; r0:r3={RAW,ENC} r1=CR
+ ((r4 = 12)
+ (read r1)
+ ;; r0:r3={RAW,ENC} CR r1
+ (if (r1 == ?\n)
+ ;; r0:r3=RAW CR r1=LF
+ ,after-newline
+ ;; r0:r3=RAW CR r1=noLF
+ ,after-cr-nolf))
+ ;; r0:r3={RAW,ENC} r1:noCR
+ ,after-nonewline))
+ ;; r0:r3={RAW,ENC}
+ `((r4 = 11)
+ (read r1)
+ ;; r0:r3={RAW,ENC} r1
+ (if (r1 == ?\n)
+ ;; r0:r3={RAW,ENC} r1=CRLF
+ ,after-newline
+ ;; r0:r3={RAW,ENC} r1:noCRLF
+ ,after-nonewline))))
+ ;; r0:r3={RAW,ENC} CR r1=LF
+ ;; r0:r3={RAW,ENC} r1=CRLF
+ `((r6 = 0)
+ (r5 = 0)
+ (branch
+ r3
+ ;; r0:r3=RAW CR r1=LF
+ ;; r0:r3=RAW r1=CRLF
+ ((write r0)
+ (write ,(if output-crlf "\r\n" "\n"))
+ (r4 = 13)
+ (read r0)
+ (break))
+ ;; r0:r3=ENC CR r1=LF
+ ;; r0:r3=ENC r1=CRLF
+ ((write ?=)
+ (write r0 ,mel-ccl-high-table)
+ (write r0 ,mel-ccl-low-table)
+ (write ,(if output-crlf "\r\n" "\n"))
+ (r4 = 14)
+ (read r0)
+ (break))))
+ ;; r0:r3={RAW,ENC} CR r1=noLF
+ `((branch
+ r3
+ ;; r0:r3=RAW CR r1:noLF
+ ((r6 = 4)
+ (r5 = 0)
+ (write ,(if output-crlf "=\r\n" "=\n"))
+ (write r0)
+ (write "=0D")
+ (r0 = r1)
+ (break))
+ ;; r0:r3=ENC CR r1:noLF
+ ((r6 = 6)
+ (r5 = 0)
+ (write ,(if output-crlf "=\r\n=" "=\n="))
+ (write r0 ,mel-ccl-high-table)
+ (write r0 ,mel-ccl-low-table)
+ (write "=0D")
+ (r0 = r1)
+ (break))))
+ ;; r0:r3={RAW,ENC} r1:noCR
+ ;; r0:r3={RAW,ENC} r1:noCRLF
+ `((branch
+ r3
+ ;; r0:r3=RAW r1:noCR
+ ;; r0:r3=RAW r1:noCRLF
+ ((r6 = 1)
+ (r5 = 0)
+ (write ,(if output-crlf "=\r\n" "=\n"))
+ (write r0)
+ (r0 = r1)
+ (break))
+ ;; r0:r3=ENC r1:noCR
+ ;; r0:r3=ENC r1:noCRLF
+ ((r6 = 3)
+ (r5 = 0)
+ (write ,(if output-crlf "=\r\n=" "=\n="))
+ (write r0 ,mel-ccl-high-table)
+ (write r0 ,mel-ccl-low-table)
+ (r0 = r1)
+ (break)))))))
+ (repeat)))
+ ;; EOF
+ ( ;(write "[EOF:") (write r4 ,mel-ccl-high-table) (write r4 ,mel-ccl-low-table) (write "]")
+ (branch
+ r4
+ ;; 0: (start) ;
+ (end)
+ ;; 1: RAW ;
+ (end)
+ ;; 2: r0:r3=ENC ;
+ (end)
+ ;; 3: SOFTBREAK r0:r3=ENC ;
+ (end)
+ ;; 4: r0:r3=WSP ;
+ ((write ,(if output-crlf "=\r\n" "=\n")) (end))
+ ;; 5: SOFTBREAK r0:r3=WSP ;
+ ((write ,(if output-crlf "=\r\n" "=\n")) (end))
+ ;; 6: ; r0=\r:r3=CR
+ (if (r6 <= 73)
+ ((write "=0D") (end))
+ ((write ,(if output-crlf "=\r\n=0D" "=\n=0D")) (end)))
+ ;; 7: r5=WSP SOFTBREAK CR:r3=CR r0=LF ;
+ (end)
+ ;; 8: r5=noWSP CR:r3=CR r0=LF ;
+ (end)
+ ;; 9: (r6=73) ; CR:r3=CR r0=CR
+ ((write ,(if output-crlf "=\r\n=0D=0D" "=\n=0D=0D")) (end))
+ ;; 10: (r6=73) CR:r3=CR CR LF ;
+ (end)
+ ;; 11: ; r0:r3={RAW,ENC}
+ (branch
+ r3
+ ((write r0) (end))
+ ((write "=")
+ (write r0 ,mel-ccl-high-table)
+ (write r0 ,mel-ccl-low-table)
+ (end)))
+ ;; 12: ; r0:r3={RAW,ENC} r1=CR
+ (branch
+ r3
+ ;; ; r0:r3=RAW r1=CR
+ ((write ,(if output-crlf "=\r\n" "=\n"))
+ (write r0)
+ (write "=0D")
+ (end))
+ ;; ; r0:r3=ENC r1=CR
+ ((write ,(if output-crlf "=\r\n=" "=\n="))
+ (write r0 ,mel-ccl-high-table)
+ (write r0 ,mel-ccl-low-table)
+ (write "=0D")
+ (end)))
+ ;; 13: r0:r3=RAW CR LF ;
+ ;; 13: r0:r3=RAW CRLF ;
+ (end)
+ ;; 14: r0:r3=ENC CR LF ;
+ ;; 14: r0:r3=ENC CRLF ;
+ (end)
+ ;; 15: r6=0 ; "F"
+ ((write "F") (end))
+ ;; 16: r6=0 ; "Fr"
+ ((write "Fr") (end))
+ ;; 17: r6=0 ; "Fro"
+ ((write "Fro") (end))
+ ;; 18: r6=0 ; "From"
+ ((write "From") (end))
+ ;; 19: r6=0 "From " ;
+ (end)
+ ;; 20: r6=0 ; "."
+ ((write ".") (end))
+ ;; 21: r6=0 ; ".\r"
+ ((write ".=0D") (end))
+ ;; 22: r6=0 ; "."
+ ((write ".") (end))
+ ;; 23: r6=0 ".\r\n" ;
+ (end)
+ ))
+ ))
+
+(defun mel-ccl-decode-quoted-printable-generic (input-crlf output-crlf)
+ `(1
+ ((read r0)
+ (loop
+ (branch
+ r0
+ ,@(mapcar
+ (lambda (r0)
+ (let ((tmp (aref mel-ccl-qp-table r0)))
+ (cond
+ ((eq tmp 'raw) `(write-read-repeat r0))
+ ((eq tmp 'wsp) (if (eq r0 (char-int ? ))
+ `(r1 = 1)
+ `(r1 = 0)))
+ ((eq tmp 'cr)
+ (if input-crlf
+ ;; r0='\r'
+ `((read r0)
+ ;; '\r' r0
+ (if (r0 == ?\n)
+ ;; '\r' r0='\n'
+ ;; hard line break found.
+ ,(if output-crlf
+ '((write ?\r)
+ (write-read-repeat r0))
+ '(write-read-repeat r0))
+ ;; '\r' r0:[^\n]
+ ;; invalid control character (bare CR) found.
+ ;; -> ignore it and rescan from r0.
+ (repeat)))
+ ;; r0='\r'
+ ;; invalid character (bare CR) found.
+ ;; -> ignore.
+ `((read r0)
+ (repeat))))
+ ((eq tmp 'lf)
+ (if input-crlf
+ ;; r0='\n'
+ ;; invalid character (bare LF) found.
+ ;; -> ignore.
+ `((read r0)
+ (repeat))
+ ;; r0='\r\n'
+ ;; hard line break found.
+ (if output-crlf
+ '((write ?\r)
+ (write-read-repeat r0))
+ '(write-read-repeat r0))))
+ ((eq r0 (char-int ?=))
+ ;; r0='='
+ `((read r0)
+ ;; '=' r0
+ (r1 = (r0 == ?\t))
+ (if ((r0 == ? ) | r1)
+ ;; '=' r0:[\t ]
+ ;; Skip transport-padding.
+ ;; It should check CR LF after
+ ;; transport-padding.
+ (loop
+ (read-if (r0 == ?\t)
+ (repeat)
+ (if (r0 == ? )
+ (repeat)
+ (break)))))
+ ;; '=' [\t ]* r0:[^\t ]
+ (branch
+ r0
+ ,@(mapcar
+ (lambda (r0)
+ (cond
+ ((eq r0 (char-int ?\r))
+ (if input-crlf
+ ;; '=' [\t ]* r0='\r'
+ `((read r0)
+ ;; '=' [\t ]* '\r' r0
+ (if (r0 == ?\n)
+ ;; '=' [\t ]* '\r' r0='\n'
+ ;; soft line break found.
+ ((read r0)
+ (repeat))
+ ;; '=' [\t ]* '\r' r0:[^\n]
+ ;; invalid input ->
+ ;; output "=" and rescan from r0.
+ ((write "=")
+ (repeat))))
+ ;; '=' [\t ]* r0='\r'
+ ;; invalid input (bare CR found) ->
+ ;; output "=" and rescan from next.
+ `((write ?=)
+ (read r0)
+ (repeat))))
+ ((eq r0 (char-int ?\n))
+ (if input-crlf
+ ;; '=' [\t ]* r0='\n'
+ ;; invalid input (bare LF found) ->
+ ;; output "=" and rescan from next.
+ `((write ?=)
+ (read r0)
+ (repeat))
+ ;; '=' [\t ]* r0='\r\n'
+ ;; soft line break found.
+ `((read r0)
+ (repeat))))
+ ((setq tmp (nth r0 mel-ccl-256-to-16-table))
+ ;; '=' [\t ]* r0:[0-9A-F]
+ ;; upper nibble of hexadecimal digit found.
+ `((r1 = r0)
+ (r0 = ,tmp)))
+ (t
+ ;; '=' [\t ]* r0:[^\r0-9A-F]
+ ;; invalid input ->
+ ;; output "=" and rescan from r0.
+ `((write ?=)
+ (repeat)))))
+ mel-ccl-256-table))
+ ;; '=' [\t ]* r1:r0:[0-9A-F]
+ (read-branch
+ r2
+ ,@(mapcar
+ (lambda (r2)
+ (if (setq tmp (nth r2 mel-ccl-256-to-16-table))
+ ;; '=' [\t ]* r1:r0:[0-9A-F] r2:[0-9A-F]
+ `(write-read-repeat
+ r0
+ ,(vconcat
+ (mapcar
+ (lambda (r0)
+ (logior (lsh r0 4) tmp))
+ mel-ccl-16-table)))
+ ;; '=' [\t ]* r1:r0:[0-9A-F] r2:[^0-9A-F]
+ ;; invalid input
+ `(r3 = 0) ; nop
+ ))
+ mel-ccl-256-table))
+ ;; '=' [\t ]* r1:r0:[0-9A-F] r2:[^0-9A-F]
+ ;; invalid input ->
+ ;; output "=" with hex digit and rescan from r2.
+ (write ?=)
+ (r0 = r2)
+ (write-repeat r1)))
+ (t
+ ;; r0:[^\t\r -~]
+ ;; invalid character found.
+ ;; -> ignore.
+ `((read r0)
+ (repeat))))))
+ mel-ccl-256-table))
+ ;; r1[0]:[\t ]
+ (loop
+ ,@(apply
+ 'append
+ (mapcar
+ (lambda (regnum)
+ (let ((reg (aref [r1 r2 r3 r4 r5] regnum)))
+ (apply
+ 'append
+ (mapcar
+ (lambda (bit)
+ (if (= bit 0)
+ (if (= regnum 0)
+ nil
+ `((read r0)
+ (if (r0 == ?\t)
+ (,reg = 0)
+ (if (r0 == ?\ )
+ (,reg = 1)
+ ((r6 = ,(+ (* regnum 28) bit))
+ (break))))))
+ `((read r0)
+ (if (r0 == ?\ )
+ (,reg |= ,(lsh 1 bit))
+ (if (r0 != ?\t)
+ ((r6 = ,(+ (* regnum 28) bit))
+ (break)))))))
+ mel-ccl-28-table))))
+ '(0 1 2 3 4)))
+ ;; white space buffer exhaust.
+ ;; error: line length limit (76bytes) violation.
+ ;; -> ignore these white spaces.
+ (repeat))
+ ,(if input-crlf
+ `(if (r0 == ?\r)
+ ((read r0)
+ (if (r0 == ?\n)
+ ;; trailing white spaces found.
+ ;; -> ignore these white spacs.
+ ((write ,(if output-crlf "\r\n" "\n"))
+ (read r0)
+ (repeat))
+ ;; [\t ]* \r r0:[^\n]
+ ;; error: bare CR found.
+ ;; -> output white spaces and ignore bare CR.
+ ))
+ ;; [\t ]* r0:[^\r]
+ ;; middle white spaces found.
+ )
+ `(if (r0 == ?\n)
+ ;; trailing white spaces found.
+ ;; -> ignore these white spacs.
+ ((write ,(if output-crlf "\r\n" "\n"))
+ (read r0)
+ (repeat))
+ ;; [\t ]* r0:[^\n]
+ ;; middle white spaces found.
+ ))
+ ,@(apply
+ 'append
+ (mapcar
+ (lambda (regnum)
+ (let ((reg (aref [r1 r2 r3 r4 r5] regnum)))
+ (apply
+ 'append
+ (mapcar
+ (lambda (bit)
+ `((if (,reg & ,(lsh 1 bit))
+ (write ?\ )
+ (write ?\t))
+ (if (r6 == ,(+ (* regnum 28) bit 1))
+ (repeat))))
+ mel-ccl-28-table))))
+ '(0 1 2 3 4)))
+ (repeat)
+ ))))
+
+)
+
+(define-ccl-program mel-ccl-encode-quoted-printable-crlf-crlf
+ (mel-ccl-encode-quoted-printable-generic t t))
+
+(define-ccl-program mel-ccl-encode-quoted-printable-crlf-lf
+ (mel-ccl-encode-quoted-printable-generic t nil))
+
+(define-ccl-program mel-ccl-encode-quoted-printable-lf-crlf
+ (mel-ccl-encode-quoted-printable-generic nil t))
+
+(define-ccl-program mel-ccl-encode-quoted-printable-lf-lf
+ (mel-ccl-encode-quoted-printable-generic nil nil))
+
+(define-ccl-program mel-ccl-decode-quoted-printable-crlf-crlf
+ (mel-ccl-decode-quoted-printable-generic t t))
+
+(define-ccl-program mel-ccl-decode-quoted-printable-crlf-lf
+ (mel-ccl-decode-quoted-printable-generic t nil))
+
+(define-ccl-program mel-ccl-decode-quoted-printable-lf-crlf
+ (mel-ccl-decode-quoted-printable-generic nil t))
+
+(define-ccl-program mel-ccl-decode-quoted-printable-lf-lf
+ (mel-ccl-decode-quoted-printable-generic nil nil))
+
+
+;;; @ coding system
+;;;
+
+(make-ccl-coding-system
+ 'mel-ccl-uq-rev ?Q "MIME Q-encoding in unstructured field (reversed)"
+ 'mel-ccl-encode-uq 'mel-ccl-decode-q)
+
+(make-ccl-coding-system
+ 'mel-ccl-cq-rev ?Q "MIME Q-encoding in comment (reversed)"
+ 'mel-ccl-encode-cq 'mel-ccl-decode-q)
+
+(make-ccl-coding-system
+ 'mel-ccl-pq-rev ?Q "MIME Q-encoding in phrase (reversed)"
+ 'mel-ccl-encode-pq 'mel-ccl-decode-q)
+
+(make-ccl-coding-system
+ 'mel-ccl-b-rev ?B "MIME B-encoding (reversed)"
+ 'mel-ccl-encode-b 'mel-ccl-decode-b)
+
+(make-ccl-coding-system
+ 'mel-ccl-quoted-printable-crlf-crlf-rev
+ ?Q "MIME Quoted-Printable-encoding (reversed)"
+ 'mel-ccl-encode-quoted-printable-crlf-crlf
+ 'mel-ccl-decode-quoted-printable-crlf-crlf)
+
+(make-ccl-coding-system
+ 'mel-ccl-quoted-printable-lf-crlf-rev
+ ?Q "MIME Quoted-Printable-encoding (LF encoding) (reversed)"
+ 'mel-ccl-encode-quoted-printable-crlf-lf
+ 'mel-ccl-decode-quoted-printable-lf-crlf)
+
+(make-ccl-coding-system
+ 'mel-ccl-quoted-printable-crlf-lf-rev
+ ?Q "MIME Quoted-Printable-encoding (LF internal) (reversed)"
+ 'mel-ccl-encode-quoted-printable-lf-crlf
+ 'mel-ccl-decode-quoted-printable-crlf-lf)
+
+(make-ccl-coding-system
+ 'mel-ccl-quoted-printable-lf-lf-rev
+ ?Q "MIME Quoted-Printable-encoding (LF encoding) (LF internal) (reversed)"
+ 'mel-ccl-encode-quoted-printable-lf-lf
+ 'mel-ccl-decode-quoted-printable-lf-lf)
+
+(make-ccl-coding-system
+ 'mel-ccl-base64-crlf-rev
+ ?B "MIME Base64-encoding (reversed)"
+ 'mel-ccl-encode-base64-crlf-crlf
+ 'mel-ccl-decode-b)
+
+(make-ccl-coding-system
+ 'mel-ccl-base64-lf-rev
+ ?B "MIME Base64-encoding (LF encoding) (reversed)"
+ 'mel-ccl-encode-base64-crlf-lf
+ 'mel-ccl-decode-b)
+
+
+;;; @ B
+;;;
+
+(unless (and (boundp 'ccl-encoder-eof-block-is-broken)
+ ccl-encoder-eof-block-is-broken)
+
+ (defun base64-ccl-encode-string (string)
+ "Encode STRING with base64 encoding."
+ (decode-coding-string string 'mel-ccl-base64-lf-rev))
+
+ (defun base64-ccl-encode-region (start end)
+ "Encode region from START to END with base64 encoding."
+ (interactive "r")
+ (decode-coding-region start end 'mel-ccl-base64-lf-rev))
+
+ (defun base64-ccl-insert-encoded-file (filename)
+ "Encode contents of file FILENAME to base64, and insert the result."
+ (interactive (list (read-file-name "Insert encoded file: ")))
+ (let ((coding-system-for-read 'mel-ccl-base64-lf-rev))
+ (insert-file-contents filename)))
+
+ (mel-define-method-function (mime-encode-string string (nil "base64"))
+ 'base64-ccl-encode-string)
+ (mel-define-method-function (mime-encode-region start end (nil "base64"))
+ 'base64-ccl-encode-region)
+ (mel-define-method-function
+ (mime-insert-encoded-file filename (nil "base64"))
+ 'base64-ccl-insert-encoded-file)
+
+ (mel-define-method-function (encoded-text-encode-string string (nil "B"))
+ 'base64-ccl-encode-string)
+ )
+
+(defun base64-ccl-decode-string (string)
+ "Decode base64 encoded STRING"
+ (encode-coding-string string 'mel-ccl-b-rev))
+
+(defun base64-ccl-decode-region (start end)
+ "Decode base64 encoded the region from START to END."
+ (interactive "r")
+ (encode-coding-region start end 'mel-ccl-b-rev))
+
+(defun base64-ccl-write-decoded-region (start end filename)
+ "Decode the region from START to END and write out to FILENAME."
+ (interactive
+ (list (region-beginning) (region-end)
+ (read-file-name "Write decoded region to file: ")))
+ (let ((coding-system-for-write 'mel-ccl-b-rev))
+ (write-region start end filename)))
+
+(mel-define-method-function (mime-decode-string string (nil "base64"))
+ 'base64-ccl-decode-string)
+(mel-define-method-function (mime-decode-region start end (nil "base64"))
+ 'base64-ccl-decode-region)
+(mel-define-method-function
+ (mime-write-decoded-region start end filename (nil "base64"))
+ 'base64-ccl-write-decoded-region)
+
+(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-ccl-decode-string string)
+ (error "Invalid encoded-text %s" string)))
+
+
+;;; @ quoted-printable
+;;;
+
+(unless (and (boundp 'ccl-encoder-eof-block-is-broken)
+ ccl-encoder-eof-block-is-broken)
+
+ (defun quoted-printable-ccl-encode-string (string)
+ "Encode STRING with quoted-printable encoding."
+ (decode-coding-string
+ string
+ 'mel-ccl-quoted-printable-lf-lf-rev))
+
+ (defun quoted-printable-ccl-encode-region (start end)
+ "Encode the region from START to END with quoted-printable encoding."
+ (interactive "r")
+ (decode-coding-region start end 'mel-ccl-quoted-printable-lf-lf-rev))
+
+ (defun quoted-printable-ccl-insert-encoded-file (filename)
+ "Encode contents of the file named as FILENAME, and insert it."
+ (interactive (list (read-file-name "Insert encoded file: ")))
+ (let ((coding-system-for-read 'mel-ccl-quoted-printable-lf-lf-rev))
+ (insert-file-contents filename)))
+
+ (mel-define-method-function
+ (mime-encode-string string (nil "quoted-printable"))
+ 'quoted-printable-ccl-encode-string)
+ (mel-define-method-function
+ (mime-encode-region start end (nil "quoted-printable"))
+ 'quoted-printable-ccl-encode-region)
+ (mel-define-method-function
+ (mime-insert-encoded-file filename (nil "quoted-printable"))
+ 'quoted-printable-ccl-insert-encoded-file)
+ )
+
+(defun quoted-printable-ccl-decode-string (string)
+ "Decode quoted-printable encoded STRING."
+ (encode-coding-string
+ string
+ 'mel-ccl-quoted-printable-lf-lf-rev))
+
+(defun quoted-printable-ccl-decode-region (start end)
+ "Decode the region from START to END with quoted-printable
+encoding."
+ (interactive "r")
+ (encode-coding-region start end 'mel-ccl-quoted-printable-lf-lf-rev))
+
+(defun quoted-printable-ccl-write-decoded-region
+ (start end filename)
+ "Decode quoted-printable encoded current region and write out to FILENAME."
+ (interactive
+ (list (region-beginning) (region-end)
+ (read-file-name "Write decoded region to file: ")))
+ (let ((coding-system-for-write 'mel-ccl-quoted-printable-lf-lf-rev))
+ (write-region start end filename)))
+
+(mel-define-method-function
+ (mime-decode-string string (nil "quoted-printable"))
+ 'quoted-printable-ccl-decode-string)
+(mel-define-method-function
+ (mime-decode-region start end (nil "quoted-printable"))
+ 'quoted-printable-ccl-decode-region)
+(mel-define-method-function
+ (mime-write-decoded-region start end filename (nil "quoted-printable"))
+ 'quoted-printable-ccl-write-decoded-region)
+
+
+;;; @ Q
+;;;
+
+(defun q-encoding-ccl-encode-string (string &optional mode)
+ "Encode STRING to Q-encoding of encoded-word, and return the result.
+MODE allows `text', `comment', `phrase' or nil. Default value is
+`phrase'."
+ (decode-coding-string
+ string
+ (cond
+ ((eq mode 'text) 'mel-ccl-uq-rev)
+ ((eq mode 'comment) 'mel-ccl-cq-rev)
+ (t 'mel-ccl-pq-rev))))
+
+(defun q-encoding-ccl-decode-string (string)
+ "Decode Q encoded STRING and return the result."
+ (encode-coding-string
+ string
+ 'mel-ccl-uq-rev))
+
+(unless (featurep 'xemacs)
+ (defun q-encoding-ccl-encoded-length (string &optional mode)
+ (let ((status [nil nil nil nil nil nil nil nil nil]))
+ (fillarray status nil)
+ (ccl-execute-on-string
+ (cond
+ ((eq mode 'text) 'mel-ccl-count-uq)
+ ((eq mode 'comment) 'mel-ccl-count-cq)
+ (t 'mel-ccl-count-pq))
+ status
+ string)
+ (aref status 0)))
+ )
+
+(mel-define-method-function (encoded-text-encode-string string (nil "Q"))
+ 'q-encoding-ccl-encode-string)
+
+(mel-define-method encoded-text-decode-string (string (nil "Q"))
+ (if (and (string-match Q-encoded-text-regexp string)
+ (string= string (match-string 0 string)))
+ (q-encoding-ccl-decode-string string)
+ (error "Invalid encoded-text %s" string)))
+
+
+;;; @ end
+;;;
+
+(provide 'mel-ccl)
+
+;;; mel-ccl.el ends here
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