--- /dev/null
+;;; viet-ccl.el --- CCL codes for Vietnamese -*- coding: iso-2022-7bit; -*-
+
+;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
+;; Licensed to the Free Software Foundation.
+;; Copyright (C) 1997,2000 MORIOKA Tomohiko
+
+;; Keywords: CCL, MULE, multilingual, Vietnamese
+
+;; This file is part of XEmacs.
+
+;; XEmacs 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.
+
+;; XEmacs 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 XEmacs; see the file COPYING. If not, write to the Free
+;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+;; 02111-1307, USA.
+
+;;; Commentary:
+
+;; For Vietnames, the character sets VISCII and VSCII are supported.
+
+;;; Code:
+
+(eval-and-compile
+
+(defvar viet-viscii-decode-table
+ [;; VISCII is a full 8-bit code.
+ 0 1 ?\e,2F\e(B 3 4 ?\e,2G\e(B ?\e,2g\e(B 7 8 9 10 11 12 13 14 15
+ 16 17 18 19 ?\e,2V\e(B 21 22 23 24 ?\e,2[\e(B 26 27 28 29 ?\e,2\\e(B 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
+ ?\e,2U\e(B ?\e,2!\e(B ?\e,2"\e(B ?\e,2#\e(B ?\e,2$\e(B ?\e,2%\e(B ?\e,2&\e(B ?\e,2'\e(B ?\e,2(\e(B ?\e,2)\e(B ?\e,2*\e(B ?\e,2+\e(B ?\e,2,\e(B ?\e,2-\e(B ?\e,2.\e(B ?\e,2/\e(B
+ ?\e,20\e(B ?\e,21\e(B ?\e,22\e(B ?\e,25\e(B ?\e,2~\e(B ?\e,2>\e(B ?\e,26\e(B ?\e,27\e(B ?\e,28\e(B ?\e,2v\e(B ?\e,2w\e(B ?\e,2o\e(B ?\e,2|\e(B ?\e,D]\e(B ?\e,2x\e(B ?\e,2O\e(B
+ ?\e,AU\e(B ?\e,1!\e(B ?\e,1"\e(B ?\e,1#\e(B ?\e,1$\e(B ?\e,1%\e(B ?\e,1&\e(B ?\e,1'\e(B ?\e,1(\e(B ?\e,1)\e(B ?\e,1*\e(B ?\e,1+\e(B ?\e,1,\e(B ?\e,1-\e(B ?\e,1.\e(B ?\e,1/\e(B
+ ?\e,10\e(B ?\e,11\e(B ?\e,12\e(B ?\e,2^\e(B ?\e,2=\e(B ?\e,15\e(B ?\e,16\e(B ?\e,17\e(B ?\e,18\e(B ?\e,2q\e(B ?\e,2Q\e(B ?\e,2W\e(B ?\e,2X\e(B ?\e,1=\e(B ?\e,1>\e(B ?\e,2_\e(B
+ ?\e,A@\e(B ?\e,AA\e(B ?\e,AB\e(B ?\e,AC\e(B ?\e,2d\e(B ?\e,BC\e(B ?\e,1F\e(B ?\e,1G\e(B ?\e,AH\e(B ?\e,AI\e(B ?\e,AJ\e(B ?\e,2k\e(B ?\e,AL\e(B ?\e,AM\e(B ?\e,D%\e(B ?\e,1O\e(B
+ ?\e,BP\e(B ?\e,1Q\e(B ?\e,AR\e(B ?\e,AS\e(B ?\e,AT\e(B ?\e,1U\e(B ?\e,1V\e(B ?\e,1W\e(B ?\e,1X\e(B ?\e,AY\e(B ?\e,AZ\e(B ?\e,1[\e(B ?\e,1\\e(B ?\e,A]\e(B ?\e,1^\e(B ?\e,1_\e(B
+ ?\e,A`\e(B ?\e,Aa\e(B ?\e,Ab\e(B ?\e,Ac\e(B ?\e,1d\e(B ?\e,Bc\e(B ?\e,1f\e(B ?\e,1g\e(B ?\e,Ah\e(B ?\e,Ai\e(B ?\e,Aj\e(B ?\e,1k\e(B ?\e,Al\e(B ?\e,Am\e(B ?\e,D5\e(B ?\e,1o\e(B
+ ?\e,Bp\e(B ?\e,1q\e(B ?\e,Ar\e(B ?\e,As\e(B ?\e,At\e(B ?\e,Au\e(B ?\e,1v\e(B ?\e,1w\e(B ?\e,1x\e(B ?\e,Ay\e(B ?\e,Az\e(B ?\e,D}\e(B ?\e,1|\e(B ?\e,A}\e(B ?\e,1~\e(B ?\e,2f\e(B ]
+ "Vietnamese VISCII decoding table.")
+
+(defvar viet-viscii-encode-table
+ (let ((table-lower (make-vector 128 0))
+ (table-upper (make-vector 128 0))
+ (i 0)
+ char-component)
+ (while (< i 256)
+ (setq char-component
+ (split-char (aref viet-viscii-decode-table i)))
+ (cond ((eq (car char-component) 'vietnamese-viscii-lower)
+ (aset table-lower (nth 1 char-component) i))
+ ((eq (car char-component) 'vietnamese-viscii-upper)
+ (aset table-upper (nth 1 char-component) i)))
+ (setq i (1+ i)))
+ (cons table-lower table-upper))
+ "Vietnamese VISCII encoding table.
+Cons of tables for encoding lower-case chars and upper-case characters.
+Both tables are indexed by the position code of Vietnamese characters.")
+
+(defvar viet-vscii-decode-table
+ [;; VSCII is a full 8-bit code.
+ 0 ?\e,AZ\e(B ?\e,2x\e(B 3 ?\e,2W\e(B ?\e,2X\e(B ?\e,2f\e(B 7 8 9 10 11 12 13 14 15
+ 16 ?\e,2Q\e(B ?\e,2_\e(B ?\e,2O\e(B ?\e,2V\e(B ?\e,2[\e(B ?\e,A]\e(B ?\e,2\\e(B 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
+ ?\e,A@\e(B ?\e,2d\e(B ?\e,AC\e(B ?\e,AA\e(B ?\e,2U\e(B ?\e,2#\e(B ?\e,2'\e(B ?\e,AH\e(B ?\e,2k\e(B ?\e,2(\e(B ?\e,AI\e(B ?\e,2)\e(B ?\e,2.\e(B ?\e,AL\e(B ?\e,2o\e(B ?\e,D%\e(B
+ ?\e,AM\e(B ?\e,28\e(B ?\e,AR\e(B ?\e,2v\e(B ?\e,AU\e(B ?\e,AS\e(B ?\e,2w\e(B ?\e,25\e(B ?\e,26\e(B ?\e,27\e(B ?\e,2^\e(B ?\e,2>\e(B ?\e,2~\e(B ?\e,AY\e(B ?\e,2|\e(B ?\e,D]\e(B
+ 160 ?\e,BC\e(B ?\e,AB\e(B ?\e,AJ\e(B ?\e,AT\e(B ?\e,2=\e(B ?\e,2_\e(B ?\e,BP\e(B ?\e,Bc\e(B ?\e,Ab\e(B ?\e,Aj\e(B ?\e,At\e(B ?\e,1>\e(B ?\e,Ay\e(B ?\e,Bp\e(B ?\e,2"\e(B
+ 192 193 194 195 196 ?\e,A`\e(B ?\e,1d\e(B ?\e,Ac\e(B ?\e,Aa\e(B ?\e,1U\e(B ?\e,2F\e(B ?\e,1"\e(B ?\e,1F\e(B ?\e,1G\e(B ?\e,1!\e(B ?\e,2G\e(B
+ ?\e,2!\e(B ?\e,2%\e(B ?\e,2&\e(B ?\e,2g\e(B ?\e,2%\e(B ?\e,2+\e(B ?\e,1#\e(B ?\e,1%\e(B ?\e,1&\e(B ?\e,1g\e(B ?\e,1$\e(B ?\e,1'\e(B ?\e,Ah\e(B ?\e,2,\e(B ?\e,1k\e(B ?\e,1(\e(B
+ ?\e,Ai\e(B ?\e,1)\e(B ?\e,1+\e(B ?\e,1,\e(B ?\e,1-\e(B ?\e,1*\e(B ?\e,1.\e(B ?\e,Al\e(B ?\e,1o\e(B ?\e,2-\e(B ?\e,2*\e(B ?\e,20\e(B ?\e,D5\e(B ?\e,Am\e(B ?\e,18\e(B ?\e,Ar\e(B
+ ?\e,21\e(B ?\e,1v\e(B ?\e,Au\e(B ?\e,As\e(B ?\e,1w\e(B ?\e,10\e(B ?\e,11\e(B ?\e,12\e(B ?\e,1/\e(B ?\e,15\e(B ?\e,16\e(B ?\e,17\e(B ?\e,1^\e(B ?\e,1>\e(B ?\e,1~\e(B ?\e,Ay\e(B
+ ?\e,22\e(B ?\e,1|\e(B ?\e,D}\e(B ?\e,Az\e(B ?\e,1x\e(B ?\e,1W\e(B ?\e,1X\e(B ?\e,1f\e(B ?\e,1Q\e(B ?\e,1q\e(B ?\e,1O\e(B ?\e,1V\e(B ?\e,1[\e(B ?\e,A}\e(B ?\e,1\\e(B ?\e,2/\e(B]
+ "Vietnamese VSCII decoding table.")
+
+(defvar viet-vscii-encode-table
+ (let ((table-lower (make-vector 128 0))
+ (table-upper (make-vector 128 0))
+ (i 0)
+ char-component)
+ (while (< i 256)
+ (setq char-component
+ (split-char (aref viet-vscii-decode-table i)))
+ (cond ((eq (car char-component) 'vietnamese-viscii-lower)
+ (aset table-lower (nth 1 char-component) i))
+ ((eq (car char-component) 'vietnamese-viscii-upper)
+ (aset table-upper (nth 1 char-component) i)))
+ (setq i (1+ i)))
+ (cons table-lower table-upper))
+ "Vietnamese VSCII encoding table.
+Cons of tables for encoding lower-case chars and upper-case characters.
+Both tables are indexed by the position code of Vietnamese characters.")
+
+)
+
+(define-ccl-program ccl-decode-viscii
+ `(3
+ ((read r0)
+ (loop
+ (write-read-repeat r0 ,viet-viscii-decode-table))
+ ))
+ "CCL program to decode VISCII 1.1")
+
+;; Multibyte form of a Vietnamese character is as follows (3-byte):
+;; LEADING-CODE-PRIVATE-11 LEADING-CODE-EXTENDED-11 POSITION-CODE
+;; where LEADING-CODE-EXTENDED-11 for Vietnamese is
+;; `vietnamese-viscii-lower' or `vietnamese-viscii-upper'.
+
+(define-ccl-program ccl-encode-viscii
+ `(1
+ ((read r0)
+ (loop
+ (if (r0 < 128)
+ ;; ASCII
+ (write-read-repeat r0)
+ ;; not ASCII
+ (if (r0 != ,leading-code-private-11)
+ ;; not Vietnamese
+ (write-read-repeat r0)
+ ((read-if (r0 == ,(charset-id 'vietnamese-viscii-lower))
+ (;; Vietnamese lower
+ (read r0)
+ (r0 -= 128)
+ (write-read-repeat r0 ,(car viet-viscii-encode-table)))
+ (if (r0 == ,(charset-id 'vietnamese-viscii-upper))
+ (;; Vietnamese upper
+ (read r0)
+ (r0 -= 128)
+ (write-read-repeat r0 ,(cdr viet-viscii-encode-table)))
+ ;; not Vietnamese
+ (write-read-repeat r0)))))))))
+ "CCL program to encode VISCII 1.1")
+
+(define-ccl-program ccl-encode-viscii-font
+ `(0
+ ;; In: R0:vietnamese-viscii-lower/vietnamese-viscii-upper
+ ;; R1:position code
+ ;; Out: R1:font code point
+ (if (r0 == ,(charset-id 'vietnamese-viscii-lower))
+ (r1 = r1 ,(car viet-viscii-encode-table))
+ (r1 = r1 ,(cdr viet-viscii-encode-table)))
+ )
+ "CCL program to encode Vietnamese chars to VISCII 1.1 font")
+
+(define-ccl-program ccl-decode-vscii
+ `(3
+ ((read r0)
+ (loop
+ (write-read-repeat r0 ,viet-vscii-decode-table))
+ ))
+ "CCL program to decode VSCII-1.")
+
+(define-ccl-program ccl-encode-vscii
+ `(1
+ ((read r0)
+ (loop
+ (if (r0 < 128)
+ ;; ASCII
+ (write-read-repeat r0)
+ ;; not ASCII
+ (if (r0 != ,leading-code-private-11)
+ ;; not Vietnamese
+ (write-read-repeat r0)
+ (read-if (r0 == ,(charset-id 'vietnamese-viscii-lower))
+ (;; Vietnamese lower
+ (read r0)
+ (r0 -= 128)
+ (write-read-repeat r0 ,(car viet-vscii-encode-table)))
+ (if (r0 == ,(charset-id 'vietnamese-viscii-upper))
+ (;; Vietnamese upper
+ (read r0)
+ (r0 -= 128)
+ (write-read-repeat r0 ,(cdr viet-vscii-encode-table)))
+ ;; not Vietnamese
+ (write-read-repeat r0))))))))
+ "CCL program to encode VSCII-1.")
+
+(define-ccl-program ccl-encode-vscii-font
+ `(0
+ ;; In: R0:vietnamese-viscii-lower/vietnamese-viscii-upper
+ ;; R1:position code
+ ;; Out: R1:font code point
+ (if (r0 == ,(charset-id 'vietnamese-viscii-lower))
+ (r1 = r1 ,(car viet-vscii-encode-table))
+ (r1 = r1 ,(cdr viet-vscii-encode-table)))
+ )
+ "CCL program to encode Vietnamese chars to VSCII-1 font.")
+
+
+(make-coding-system
+ 'viscii 'ccl
+ "Coding-system used for VISCII 1.1."
+ `(mnemonic "VISCII"
+ decode ,ccl-decode-viscii
+ encode ,ccl-encode-viscii))
+
+;; it is not correct, but XEmacs doesn't have `ccl' category...
+(coding-system-put 'viscii 'category 'iso-8-1)
+
+;; (make-coding-system
+;; 'vietnamese-viscii 4 ?V
+;; "8-bit encoding for Vietnamese VISCII 1.1 (MIME:VISCII)"
+;; '(ccl-decode-viscii . ccl-encode-viscii)
+;; '((safe-charsets ascii vietnamese-viscii-lower vietnamese-viscii-upper)
+;; (mime-charset . viscii)
+;; (valid-codes (0 . 255))))
+
+;; (define-coding-system-alias 'viscii 'vietnamese-viscii)
+
+(make-coding-system
+ 'vscii 'ccl
+ "Coding-system used for VSCII 1.1."
+ `(mnemonic "VSCII"
+ decode ,ccl-decode-vscii
+ encode ,ccl-encode-vscii))
+
+;; (make-coding-system
+;; 'vietnamese-vscii 4 ?v
+;; "8-bit encoding for Vietnamese VSCII-1"
+;; '(ccl-decode-vscii . ccl-encode-vscii)
+;; '((safe-charsets ascii vietnamese-viscii-lower vietnamese-viscii-upper)
+;; (valid-codes (0 . 255))))
+
+;; (define-coding-system-alias 'vscii 'vietnamese-vscii)
+
+;; For VISCII users
+(set-charset-ccl-program 'vietnamese-viscii-lower
+ ccl-encode-viscii-font)
+(set-charset-ccl-program 'vietnamese-viscii-upper
+ ccl-encode-viscii-font)
+;; For VSCII users
+(set-charset-ccl-program 'vietnamese-viscii-lower ccl-encode-vscii-font)
+(set-charset-ccl-program 'vietnamese-viscii-upper ccl-encode-vscii-font)
+
+;; (setq font-ccl-encoder-alist
+;; (cons (cons "viscii" ccl-encode-viscii-font) font-ccl-encoder-alist))
+
+;; (setq font-ccl-encoder-alist
+;; (cons (cons "vscii" ccl-encode-vscii-font) font-ccl-encoder-alist))
+
+;; (defvar viet-viscii-nonascii-translation-table
+;; (make-translation-table-from-vector viet-viscii-decode-table)
+;; "Value of `nonascii-translation-table' in Vietnamese language environment.")
+
+;;; viet-ccl.el ends here
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