src/code/external-formats/enc-jpn.lisp

   1 (in-package "SB!IMPL")
   2
   3 ;;; EUC-JP
   4 (declaim (inline ucs-to-eucjp eucjp-to-ucs
   5                  mb-len-as-eucjp eucjp-continuation-byte-p))
   6
   7 (defun ucs-to-eucjp (code)
   8   (declare (optimize speed (safety 0))
   9            (type fixnum code))
  10   (if (<= code #x7F) code
  11       (get-multibyte-mapper *ucs-to-eucjp-table* code)))
  12
  13 (defun eucjp-to-ucs (code)
  14   (declare (optimize speed (safety 0))
  15            (type fixnum code))
  16   (if (<= code #x7F) code
  17       (get-multibyte-mapper *eucjp-to-ucs-table* code)))
  18
  19 (defun mb-len-as-eucjp (code)
  20   (declare (optimize speed (safety 0))
  21            (type (unsigned-byte 8) code))
  22   (cond ((< code #x80) 1)
  23         ((or (= code #x8E) (<= #xA1 code #xFE)) 2)
  24         ((= code #x8F) 3)))
  25
  26 (defun eucjp-continuation-byte-p (code)
  27   (declare (optimize speed (safety 0))
  28            (type (unsigned-byte 8) code))
  29   (<= #xA1 code #xFE))
  30
  31 (define-multibyte-encoding :euc-jp (:euc-jp :eucjp :|eucJP|)
  32   ucs-to-eucjp eucjp-to-ucs mb-len-as-eucjp eucjp-continuation-byte-p)
  33
  34 ;;; Shift_JIS
  35 (declaim (inline ucs-to-sjis sjis-to-ucs
  36                  mb-len-as-sjis sjis-continuation-byte-p))
  37
  38 (defun ucs-to-sjis (code)
  39   (declare (optimize speed (safety 0))
  40            (type fixnum code))
  41   (if (<= code #x7F) code
  42       (get-multibyte-mapper *ucs-to-sjis-table* code)))
  43
  44 (defun sjis-to-ucs (code)
  45   (declare (optimize speed (safety 0))
  46            (type fixnum code))
  47   (if (<= code #x7F) code
  48       (get-multibyte-mapper *sjis-to-ucs-table* code)))
  49
  50 (defun mb-len-as-sjis (code)
  51   (declare (optimize speed (safety 0))
  52            (type (unsigned-byte 8) code))
  53   (cond ((or (< code #x80) (<= #xA1 code #xDF)) 1)
  54         ((or (<= #x81 code #x9F) (<= #xE0 code #xFC)) 2)))
  55
  56 (defun sjis-continuation-byte-p (code)
  57   (declare (optimize speed (safety 0))
  58            (type (unsigned-byte 8) code))
  59   (or (<= #x40 code #x7E) (<= #x80 code #xFC)))
  60
  61 (define-multibyte-encoding :shift_jis (:shift_jis :sjis :|Shift_JIS| :cp932)
  62   ucs-to-sjis sjis-to-ucs mb-len-as-sjis sjis-continuation-byte-p)