/usr/lib/ecl-16.1.2/encodings/iso-2022-jp is in ecl 16.1.2-3.
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 | (cl:unless (cl:find-package :ISO-2022-JP)
(make-package :ISO-2022-JP))
(in-package :ISO-2022-JP)
(defun compose (bytes)
(loop for i in bytes
with cum = 0
do (setf cum (+ (ash cum 8) i))
finally (return cum)))
(defun mapping-hash-table (sequence &optional (mask 0))
(loop with hash = (make-hash-table :size (floor (* 1.5 (length sequence)))
:test 'eq)
for i from 0 below (length sequence) by 2
for multibyte = (elt sequence i)
for codepoint = (elt sequence (1+ i))
for unicode-char = (code-char codepoint)
when (zerop (logand multibyte mask))
do (progn
(setf (gethash multibyte hash) unicode-char)
(setf (gethash unicode-char hash) multibyte)
(when (> multibyte #xFF)
(setf (gethash (ash multibyte -8) hash) t)))
finally (return hash)))
(defun multimap (escapes tables)
(loop for seq in escapes
for table in tables
for table-cons = (member table tables :test 'eq)
do (progn
;; Change escape sequence into byte codes
(setf seq (mapcar #'char-code seq))
;; Store it in the hash table
(setf (gethash t table) seq)
(loop for other-table in tables
do (loop for i from 1
for precedings = (butlast seq i)
while precedings
do (setf (gethash (compose precedings) other-table) t)
finally (setf (gethash (compose seq) other-table) table-cons)))))
(nconc tables tables))
(defparameter ext::iso-2022-jp
(let* ((ascii-no-esc (mapping-hash-table (loop for i from 0 to 127
unless (= i (char-code #\esc))
nconc (list i i))))
(jis208 (mapping-hash-table (ext::load-encoding :jisx0208) #x8080))
(jis201 (mapping-hash-table (ext::load-encoding :jisx0201) #x80)))
(multimap '((#\Esc #\( #\B)
(#\Esc #\( #\J)
(#\Esc #\$ #\@)
(#\Esc #\$ #\B))
(list ascii-no-esc jis201 jis208 jis208))))
(delete-package :ISO-2022-JP)
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