enc-cp1252.lisp - clic - Clic is an command line interactive client for gopher written in Common LISP
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enc-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))))