;;; vietnamese.el --- support for Vietnamese -*- coding: iso-2022-7bit; -*-

;; Copyright (C) 1998, 2001, 2002, 2003, 2004, 2005, 2006, 2007
;;   Free Software Foundation, Inc.
;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
;;   2005, 2006, 2007
;;   National Institute of Advanced Industrial Science and Technology (AIST)
;;   Registration Number H14PRO021

;; Keywords: multilingual, Vietnamese

;; This file is part of GNU Emacs.

;; GNU Emacs 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.

;; GNU Emacs 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 GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Commentary:

;; For Vietnames, the character sets VISCII, VSCII and TCVN-5712 are
;; supported.

;;; Code:

(defvar viet-viscii-decode-table
  [;; VISCII is a full 8-bit code.
   0 1 ?,2F(B 3 4 ?,2G(B ?,2g(B 7 8 9 10 11 12 13 14 15
   16 17 18 19 ?,2V(B 21 22 23 24 ?,2[(B 26 27 28 29 ?,2\(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
   ?,2U(B ?,2!(B ?,2"(B ?,2#(B ?,2$(B ?,2%(B ?,2&(B ?,2'(B ?,2((B ?,2)(B ?,2*(B ?,2+(B ?,2,(B ?,2-(B ?,2.(B ?,2/(B
   ?,20(B ?,21(B ?,22(B ?,25(B ?,2~(B ?,2>(B ?,26(B ?,27(B ?,28(B ?,2v(B ?,2w(B ?,2o(B ?,2|(B ?,2{(B ?,2x(B ?,2O(B
   ?,2u(B ?,1!(B ?,1"(B ?,1#(B ?,1$(B ?,1%(B ?,1&(B ?,1'(B ?,1((B ?,1)(B ?,1*(B ?,1+(B ?,1,(B ?,1-(B ?,1.(B ?,1/(B
   ?,10(B ?,11(B ?,12(B ?,2^(B ?,2=(B ?,15(B ?,16(B ?,17(B ?,18(B ?,2q(B ?,2Q(B ?,2W(B ?,2X(B ?,1=(B ?,1>(B ?,2_(B
   ?,2`(B ?,2a(B ?,2b(B ?,2c(B ?,2d(B ?,2e(B ?,1F(B ?,1G(B ?,2h(B ?,2i(B ?,2j(B ?,2k(B ?,2l(B ?,2m(B ?,2n(B ?,1O(B
   ?,2p(B ?,1Q(B ?,2r(B ?,2s(B ?,2t(B ?,1U(B ?,1V(B ?,1W(B ?,1X(B ?,2y(B ?,2z(B ?,1[(B ?,1\(B ?,2}(B ?,1^(B ?,1_(B
   ?,1`(B ?,1a(B ?,1b(B ?,1c(B ?,1d(B ?,1e(B ?,1f(B ?,1g(B ?,1h(B ?,1i(B ?,1j(B ?,1k(B ?,1l(B ?,1m(B ?,1n(B ?,1o(B
   ?,1p(B ?,1q(B ?,1r(B ?,1s(B ?,1t(B ?,1u(B ?,1v(B ?,1w(B ?,1x(B ?,1y(B ?,1z(B ?,1{(B ?,1|(B ?,1}(B ?,1~(B ?,2f(B ]
  "Vietnamese VISCII decoding table.")

(let ((table (make-translation-table-from-vector viet-viscii-decode-table)))
  (define-translation-table 'viet-viscii-nonascii-translation-table table)
  (define-translation-table 'viet-viscii-encode-table
    (char-table-extra-slot table 0)))

;;;
;;; VSCII is a pre-version of TCVN-5712 and deprecated
;;;
(defvar viet-vscii-decode-table
  [;; VSCII is a full 8-bit code.
   0 ?,2z(B ?,2x(B 3 ?,2W(B ?,2X(B ?,2f(B 7 8 9 10 11 12 13 14 15
   16 ?,2Q(B ?,2_(B ?,2O(B ?,2V(B ?,2[(B ?,2}(B ?,2\(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
   ?,2`(B ?,2d(B ?,2c(B ?,2a(B ?,2U(B ?,2#(B ?,2'(B ?,2h(B ?,2k(B ?,2((B ?,2i(B ?,2)(B ?,2.(B ?,2l(B ?,2o(B ?,2n(B
   ?,2m(B ?,28(B ?,2r(B ?,2v(B ?,2u(B ?,2s(B ?,2w(B ?,25(B ?,26(B ?,27(B ?,2^(B ?,2>(B ?,2~(B ?,2y(B ?,2|(B ?,2{(B
   160 ?,2e(B ?,2b(B ?,2j(B ?,2t(B ?,2=(B ?,2_(B ?,2p(B ?,1e(B ?,1b(B ?,1j(B ?,1t(B ?,1=(B ?,1y(B ?,1p(B ?,2"(B
   192 193 194 195 196 ?,1`(B ?,1d(B ?,1c(B ?,1a(B ?,1U(B ?,2F(B ?,1"(B ?,1F(B ?,1G(B ?,1!(B ?,2G(B
   ?,2!(B ?,2%(B ?,2&(B ?,2g(B ?,2%(B ?,2+(B ?,1#(B ?,1%(B ?,1&(B ?,1g(B ?,1$(B ?,1'(B ?,1h(B ?,2,(B ?,1k(B ?,1((B
   ?,1i(B ?,1)(B ?,1+(B ?,1,(B ?,1-(B ?,1*(B ?,1.(B ?,1l(B ?,1o(B ?,2-(B ?,2*(B ?,20(B ?,1n(B ?,1m(B ?,18(B ?,1r(B
   ?,21(B ?,1v(B ?,1u(B ?,1s(B ?,1w(B ?,10(B ?,11(B ?,12(B ?,1/(B ?,15(B ?,16(B ?,17(B ?,1^(B ?,1>(B ?,1~(B ?,1y(B
   ?,22(B ?,1|(B ?,1{(B ?,1z(B ?,1x(B ?,1W(B ?,1X(B ?,1f(B ?,1Q(B ?,1q(B ?,1O(B ?,1V(B ?,1[(B ?,1}(B ?,1\(B ?,2/(B]
  "Vietnamese VSCII decoding table.")

(let ((table (make-translation-table-from-vector viet-vscii-decode-table)))
  (define-translation-table 'viet-vscii-nonascii-translation-table table)
  (define-translation-table 'viet-vscii-encode-table
    (char-table-extra-slot table 0)))

;; Does not support combining characters in the range [176, 180]
(defvar viet-tcvn-decode-table
  [;; TCVN is a full 8-bit code.
   0 ?,2z(B ?,2x(B 3 ?,2W(B ?,2X(B ?,2f(B 7 8 9 10 11 12 13 14 15
   16 ?,2Q(B ?,2q(B ?,2O(B ?,2V(B ?,2[(B ?,2}(B ?,2\(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
   ?,2`(B ?,2d(B ?,2c(B ?,2a(B ?,2U(B ?,2#(B ?,2'(B ?,2h(B ?,2k(B ?,2((B ?,2i(B ?,2)(B ?,2.(B ?,2l(B ?,2o(B ?,2n(B
   ?,2m(B ?,28(B ?,2r(B ?,2v(B ?,2u(B ?,2s(B ?,2w(B ?,25(B ?,26(B ?,27(B ?,2^(B ?,2>(B ?,2~(B ?,2y(B ?,2|(B ?,2{(B
   160 ?,2e(B ?,2b(B ?,2j(B ?,2t(B ?,2=(B ?,2_(B ?,2p(B ?,1e(B ?,1b(B ?,1j(B ?,1t(B ?,1=(B ?,1_(B ?,1p(B ?,2"(B
   176 177 178 179 180 ?,1`(B ?,1d(B ?,1c(B ?,1a(B ?,1U(B ?,2F(B ?,1"(B ?,1F(B ?,1G(B ?,1!(B ?,2G(B
   ?,2!(B ?,2%(B ?,2&(B ?,2g(B ?,2$(B ?,2+(B ?,1#(B ?,1%(B ?,1&(B ?,1g(B ?,1$(B ?,1'(B ?,1h(B ?,2,(B ?,1k(B ?,1((B
   ?,1i(B ?,1)(B ?,1+(B ?,1,(B ?,1-(B ?,1*(B ?,1.(B ?,1l(B ?,1o(B ?,2-(B ?,2*(B ?,20(B ?,1n(B ?,1m(B ?,18(B ?,1r(B
   ?,21(B ?,1v(B ?,1u(B ?,1s(B ?,1w(B ?,10(B ?,11(B ?,12(B ?,1/(B ?,15(B ?,16(B ?,17(B ?,1^(B ?,1>(B ?,1~(B ?,1y(B
   ?,22(B ?,1|(B ?,1{(B ?,1z(B ?,1x(B ?,1W(B ?,1X(B ?,1f(B ?,1Q(B ?,1q(B ?,1O(B ?,1V(B ?,1[(B ?,1}(B ?,1\(B ?,2/(B]
  "Vietnamese TCVN-5712 decoding table.")

(let ((table (make-translation-table-from-vector viet-tcvn-decode-table)))
  (define-translation-table 'viet-tcvn-nonascii-translation-table table)
  (define-translation-table 'viet-tcvn-encode-table
    (char-table-extra-slot table 0)))

;; (defvar viet-vps-decode-table
;;   [;; VPS is a full 8-bit code.
;;    0 1 ?,2U(B ?,2'(B ?,2#(B ?,2)(B ?,2.(B 7 8 9 10 11 12 13 14 15
;;    ?,28(B ?,2w(B ?,25(B ?,2~(B ?,2x(B ?,2q(B 22 23 24 ?,2\(B 26 27 ?,2g(B ?,2f(B 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
;;    ?,2`(B ?,2d(B ?,2c(B ?,2$(B ?,2%(B ?,2&(B ?,1w(B ?,12(B ?,2e(B ?,1*(B ?,1+(B ?,1,(B ?,1.(B ?,2!(B ?,2"(B ?,2F(B
;;    ?,2*(B 145 146 ?,2+(B ?,2,(B ?,2-(B ?,2/(B ?,20(B ?,21(B ?,22(B ?,1}(B ?,1V(B ?,1\(B ?,2>(B ?,26(B ?,27(B
;;    160 ?,1!(B ?,1"(B ?,1F(B ?,1G(B ?,1#(B ?,2^(B ?,1>(B ?,2y(B ?,16(B ?,17(B ?,1^(B ?,2{(B ?,2Q(B ?,1~(B ?,2W(B
;;    ?,11(B ?,2X(B ?,2O(B ?,2[(B ?,2m(B ?,2l(B ?,15(B ?,2o(B ?,2n(B ?,2s(B ?,1X(B ?,1f(B ?,2r(B ?,2v(B ?,2u(B ?,1q(B
;;    ?,1%(B ?,2a(B ?,2b(B ?,1$(B ?,1&(B ?,1g(B ?,1'(B ?,1p(B ?,1k(B ?,2i(B ?,2j(B ?,1)(B ?,1o(B ?,1-(B ?,18(B ?,1[(B
;;    ?,2_(B ?,2|(B ?,10(B ?,1/(B ?,2t(B ?,1v(B ?,1=(B ?,2h(B ?,1W(B ?,1Q(B ?,2z(B ?,1{(B ?,1_(B ?,2}(B ?,2k(B 223
;;    ?,1`(B ?,1a(B ?,1b(B ?,1c(B ?,1d(B ?,1U(B ?,1e(B 231 ?,1h(B ?,1i(B ?,1j(B ?,1((B ?,1l(B ?,1m(B 238 ?,1n(B
;;    ?,2G(B ?,2p(B ?,1r(B ?,1s(B ?,1t(B ?,1u(B 246 ?,2=(B ?,1x(B ?,1y(B ?,1z(B ?,1|(B 252 ?,2V(B ?,2((B ?,1O(B]
;;   "Vietnamese VPS decoding table.")
;;
;; (let ((table (make-translation-table-from-vector viet-vps-decode-table)))
;;   (define-translation-table 'viet-vps-nonascii-translation-table table)
;;   (define-translation-table 'viet-vps-encode-table
;;     (char-table-extra-slot table 0)))

(define-ccl-program ccl-decode-viscii
  `(3
    ((loop
      (r0 = 0)
      (read r1)
      (translate-character viet-viscii-nonascii-translation-table r0 r1)
      (write-multibyte-character r0 r1)
      (repeat))))
  "CCL program to decode VISCII 1.1")

(define-ccl-program ccl-encode-viscii
  `(1
    ((loop
      (read-multibyte-character r0 r1)
      (translate-character viet-viscii-encode-table r0 r1)
      (write-repeat r1))))
  "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
    (translate-character viet-viscii-encode-table r0 r1))
  "CCL program to encode Vietnamese chars to VISCII 1.1 font")

(define-ccl-program ccl-decode-vscii
  `(3
    ((loop
      (r0 = 0)
      (read r1)
      (translate-character viet-vscii-nonascii-translation-table r0 r1)
      (write-multibyte-character r0 r1)
      (repeat))))
  "CCL program to decode VSCII-1.")

(define-ccl-program ccl-encode-vscii
  `(1
    ((loop
      (read-multibyte-character r0 r1)
      (translate-character viet-vscii-encode-table r0 r1)
      (write-repeat r1))))
  "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
    (translate-character viet-vscii-encode-table r0 r1))
  "CCL program to encode Vietnamese chars to VSCII-1 font.")

(define-ccl-program ccl-decode-tcvn
  `(3
    ((loop
      (r0 = 0)
      (read r1)
      (translate-character viet-tcvn-nonascii-translation-table r0 r1)
      (write-multibyte-character r0 r1)
      (repeat))))
  "CCL program to decode TCVN-5712.")

(define-ccl-program ccl-encode-tcvn
  `(1
    ((loop
      (read-multibyte-character r0 r1)
      (translate-character viet-tcvn-encode-table r0 r1)
      (write-repeat r1))))
  "CCL program to encode TCVN-5712.")

(define-ccl-program ccl-encode-tcvn-font
  `(0
    ;; In:  R0:vietnamese-viscii-lower/vietnamese-viscii-upper
    ;;      R1:position code
    ;; Out: R1:font code point
    (translate-character viet-tcvn-encode-table r0 r1))
  "CCL program to encode Vietnamese chars to TCVN-5712 font.")

;; (define-ccl-program ccl-decode-vps
;;   `(3
;;     ((loop
;; 	 (r0 = 0)
;; 	 (read r1)
;; 	 (translate-character viet-vps-nonascii-translation-table r0 r1)
;; 	 (write-multibyte-character r0 r1)
;; 	 (repeat))))
;;   "CCL program to decode VPS.")
;;
;; (define-ccl-program ccl-encode-vps
;;   `(1
;;     ((loop
;; 	 (read-multibyte-character r0 r1)
;; 	 (translate-character viet-vps-encode-table r0 r1)
;; 	 (write-repeat r1))))
;;   "CCL program to encode VPS.")
;;
;; (define-ccl-program ccl-encode-vps-font
;;   `(0
;;     ;; In:  R0:vietnamese-viscii-lower/vietnamese-viscii-upper
;;     ;;      R1:position code
;;     ;; Out: R1:font code point
;;     (translate-character viet-vps-encode-table r0 r1))
;;   "CCL program to encode Vietnamese chars to VPS font.")

(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
 '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)

(make-coding-system
 'vietnamese-tcvn 4 ?t
 "8-bit encoding for Vietnamese TCVN-5712"
 '(ccl-decode-tcvn . ccl-encode-tcvn)
 '((safe-charsets ascii vietnamese-viscii-lower vietnamese-viscii-upper)
   (valid-codes (0 . 255))))

(define-coding-system-alias 'tcvn 'vietnamese-tcvn)
(define-coding-system-alias 'tcvn-5712 'vietnamese-tcvn)

;; (make-coding-system
;;  'vietnamese-vps 4 ?p
;;  "8-bit encoding for Vietnamese VPS"
;;  '(ccl-decode-vps . ccl-encode-vps)
;;  '((safe-charsets ascii vietnamese-viscii-lower vietnamese-viscii-upper)
;;    (valid-codes (0 . 255))))
;;
;; (define-coding-system-alias 'vps 'vietnamese-vps)

(make-coding-system
 'vietnamese-viqr 0 ?q
 "Vietnamese latin transcription (VIQR)"
 nil
 '((safe-charsets ascii vietnamese-viscii-lower vietnamese-viscii-upper)
   (post-read-conversion . viqr-post-read-conversion)
   (pre-write-conversion . viqr-pre-write-conversion)
   (charset-origin-alist
    (vietnamese-viscii-lower "VISCII" viet-encode-viscii-char)
    (vietnamese-viscii-upper "VISCII" viet-encode-viscii-char))))


(define-coding-system-alias 'viqr 'vietnamese-viqr)

(setq font-ccl-encoder-alist
      (cons '("viscii" . ccl-encode-viscii-font) font-ccl-encoder-alist))

(setq font-ccl-encoder-alist
      (cons '("vscii" . ccl-encode-vscii-font) font-ccl-encoder-alist))

(setq font-ccl-encoder-alist
      (cons '("tcvn" . ccl-encode-tcvn-font) font-ccl-encoder-alist))

(set-language-info-alist
 "Vietnamese" `((charset vietnamese-viscii-lower vietnamese-viscii-upper)
		(nonascii-translation
		 . ,(get 'viet-viscii-nonascii-translation-table
			 'translation-table))
		(coding-system vietnamese-viscii vietnamese-vscii vietnamese-tcvn
			       vietnamese-viqr)
		(coding-priority vietnamese-viscii)
		(input-method . "vietnamese-viqr")
		(unibyte-display . vietnamese-viscii)
		(features viet-util)
		(sample-text . "Vietnamese (Ti,1*(Bng Vi,1.(Bt)	Ch,1`(Bo b,1U(Bn")
		(documentation . "\
For Vietnamese, Emacs uses special charsets internally.
They can be decoded from and encoded to VISCII, VSCII, TCVN-5712, and
VIQR.  VSCII is deprecated in favour of TCVN-5712.  Current setting
puts higher priority to the coding system VISCII than TCVN-5712.  If
you prefer TCVN-5712, please do: (prefer-coding-system 'vietnamese-tcvn).
There are two Vietnamese input methods: VIQR and Telex, VIQR is the
default setting.")
		))

(provide 'vietnamese)

;;; arch-tag: 5bd4f1aa-2d4e-4f33-b7d8-0679c6a19ee6
;;; vietnamese.el ends here
