2 * Copyright (C) 1999-2002, 2006, 2016 Free Software Foundation, Inc.
3 * This file is part of the GNU LIBICONV Library.
5 * The GNU LIBICONV Library is free software; you can redistribute it
6 * and/or modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * The GNU LIBICONV Library is distributed in the hope that it will be
11 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
17 * If not, see <http://www.gnu.org/licenses/>.
25 * BIG5-HKSCS:2001 can be downloaded from
26 * http://www.info.gov.hk/digital21/eng/hkscs/download.html
27 * http://www.info.gov.hk/digital21/eng/hkscs/index.html
29 * It extends BIG5-HKSCS:1999 through 116 characters.
31 * It extends BIG5 (without the rows 0xC6..0xC7) through the ranges
33 * 0x{88..8D}{40..7E,A1..FE} 757 characters
34 * 0x{8E..A0}{40..7E,A1..FE} 2898 characters
35 * 0x{C6..C8}{40..7E,A1..FE} 359 characters
36 * 0xF9{D6..FE} 41 characters
37 * 0x{FA..FE}{40..7E,A1..FE} 763 characters
39 * Note that some HKSCS characters are not contained in Unicode 3.2
40 * and are therefore best represented as sequences of Unicode characters:
41 * 0x8862 U+00CA U+0304 LATIN CAPITAL LETTER E WITH CIRCUMFLEX AND MACRON
42 * 0x8864 U+00CA U+030C LATIN CAPITAL LETTER E WITH CIRCUMFLEX AND CARON
43 * 0x88A3 U+00EA U+0304 LATIN SMALL LETTER E WITH CIRCUMFLEX AND MACRON
44 * 0x88A5 U+00EA U+030C LATIN SMALL LETTER E WITH CIRCUMFLEX AND CARON
47 #include "hkscs2001.h"
51 big5hkscs2001_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
53 ucs4_t last_wc = conv->istate;
55 /* Output the buffered character. */
58 return 0; /* Don't advance the input pointer. */
61 /* Code set 0 (ASCII) */
63 return ascii_mbtowc(conv,pwc,s,n);
64 /* Code set 1 (BIG5 extended) */
65 if (c >= 0xa1 && c < 0xff) {
69 unsigned char c2 = s[1];
70 if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0xa1 && c2 < 0xff)) {
71 if (!((c == 0xc6 && c2 >= 0xa1) || c == 0xc7)) {
72 int ret = big5_mbtowc(conv,pwc,s,2);
80 int ret = hkscs1999_mbtowc(conv,pwc,s,n);
85 int ret = hkscs2001_mbtowc(conv,pwc,s,n);
93 unsigned char c2 = s[1];
94 if (c2 == 0x62 || c2 == 0x64 || c2 == 0xa3 || c2 == 0xa5) {
95 /* It's a composed character. */
96 ucs4_t wc1 = ((c2 >> 3) << 2) + 0x009a; /* = 0x00ca or 0x00ea */
97 ucs4_t wc2 = ((c2 & 6) << 2) + 0x02fc; /* = 0x0304 or 0x030c */
98 /* We cannot output two Unicode characters at once. So,
99 output the first character and buffer the second one. */
110 #define big5hkscs2001_flushwc normal_flushwc
113 big5hkscs2001_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
116 unsigned char last = conv->ostate;
119 /* last is = 0x66 or = 0xa7. */
120 if (wc == 0x0304 || wc == 0x030c) {
121 /* Output the combined character. */
124 r[1] = last + ((wc & 24) >> 2) - 4; /* = 0x62 or 0x64 or 0xa3 or 0xa5 */
131 /* Output the buffered character. */
140 /* Code set 0 (ASCII) */
142 /* Plain ASCII character. */
144 r[0] = (unsigned char) wc;
150 unsigned char buf[2];
153 /* Code set 1 (BIG5 extended) */
154 ret = big5_wctomb(conv,buf,wc,2);
155 if (ret != RET_ILUNI) {
156 if (ret != 2) abort();
157 if (!((buf[0] == 0xc6 && buf[1] >= 0xa1) || buf[0] == 0xc7)) {
167 ret = hkscs1999_wctomb(conv,buf,wc,2);
168 if (ret != RET_ILUNI) {
169 if (ret != 2) abort();
170 if ((wc & ~0x0020) == 0x00ca) {
171 /* A possible first character of a multi-character sequence. We have to
173 if (!(buf[0] == 0x88 && (buf[1] == 0x66 || buf[1] == 0xa7))) abort();
174 conv->ostate = buf[1]; /* = 0x66 or = 0xa7 */
185 ret = hkscs2001_wctomb(conv,buf,wc,2);
186 if (ret != RET_ILUNI) {
187 if (ret != 2) abort();
201 big5hkscs2001_reset (conv_t conv, unsigned char *r, size_t n)
203 unsigned char last = conv->ostate;
210 /* conv->ostate = 0; will be done by the caller */