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	tenc-cp1252.lisp (3129B)
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	1 ;;;; -- Mode: lisp; indent-tabs-mode: nil --
	2 ;;;
	3 ;;; enc-cp1252.lisp --- Implementation of the CP1252 character encoding.
	4 ;;;
	5 ;;; Copyright (C) 2011, Nicolas Martyanoff
	6 ;;;
	7 ;;; Permission is hereby granted, free of charge, to any person
	8 ;;; obtaining a copy of this software and associated documentation
	9 ;;; files (the "Software"), to deal in the Software without
	10 ;;; restriction, including without limitation the rights to use, copy,
	11 ;;; modify, merge, publish, distribute, sublicense, and/or sell copies
	12 ;;; of the Software, and to permit persons to whom the Software is
	13 ;;; furnished to do so, subject to the following conditions:
	14 ;;;
	15 ;;; The above copyright notice and this permission notice shall be
	16 ;;; included in all copies or substantial portions of the Software.
	17 ;;;
	18 ;;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	19 ;;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	20 ;;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	21 ;;; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
	22 ;;; HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
	23 ;;; WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	24 ;;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
	25 ;;; DEALINGS IN THE SOFTWARE.
	26
	27 (in-package #:babel-encodings)
	28
	29 (define-character-encoding :cp1252
	30 "A 8-bit, fixed-width character encoding used by Windows for Western
	31 European languages."
	32 :aliases '(:windows-1252)
	33 :literal-char-code-limit 256)
	34
	35 (define-constant +cp1252-to-unicode+
	36 #(#x20ac nil #x201a #x0192 #x201e #x2026 #x2020 #x2021
	37 #x02c6 #x2030 #x0160 #x2039 #x0152 nil #x017d nil
	38 nil #x2018 #x2019 #x201c #x201d #x2022 #x2013 #x2014
	39 #x02dc #x2122 #x0161 #x203a #x0153 nil #x017e #x0178)
	40 :test #'equalp)
	41
	42 (define-unibyte-decoder :cp1252 (octet)
	43 (if (and (>= octet #x80) (<= octet #x9f))
	44 (svref +cp1252-to-unicode+
	45 (the ub8 (- octet #x80)))
	46 octet))
	47
	48 (define-constant +unicode-0152-017e-cp1252+
	49 #(#x8c #x9c #x00 #x00 #x00 #x00 #x00 #x00
	50 #x00 #x00 #x00 #x00 #x00 #x00 #x8a #x9a
	51 #x00 #x00 #x00 #x00 #x00 #x00 #x00 #x00
	52 #x00 #x00 #x00 #x00 #x00 #x00 #x00 #x00
	53 #x00 #x00 #x00 #x00 #x00 #x00 #x9f #x00
	54 #x00 #x00 #x00 #x8e #x9e)
	55 :test #'equalp)
	56
	57 (define-constant +unicode-2013-203a-cp1252+
	58 #(#x96 #x97 #x00 #x00 #x00 #x91 #x92 #x82
	59 #x00 #x93 #x94 #x84 #x00 #x86 #x87 #x95
	60 #x00 #x00 #x00 #x85 #x00 #x00 #x00 #x00
	61 #x00 #x00 #x00 #x00 #x00 #x89 #x00 #x00
	62 #x00 #x00 #x00 #x00 #x00 #x00 #x8b #x9b)
	63 :test #'equalp)
	64
	65 (define-unibyte-encoder :cp1252 (code)
	66 (cond
	67 ((or (< code #x80)
	68 (and (> code #xa0) (<= code #xff)))
	69 code)
	70 ((and (>= code #x0152) (<= code #x017e))
	71 (svref +unicode-0152-017e-cp1252+
	72 (the ub8 (- code #x0152))))
	73 ((= code #x0192) #x83)
	74 ((= code #x02c6) #x88)
	75 ((= code #x02dc) #x89)
	76 ((and (>= code #x2013) (<= code #x203a))
	77 (svref +unicode-2013-203a-cp1252+
	78 (the ub8 (- code #x2013))))
	79 ((= code #x20ac) #x80)
	80 ((= code #x2122) #x99)
	81 (t (handle-error))))