| /* |
| * Copyright (C) 1999-2002, 2006, 2016 Free Software Foundation, Inc. |
| * This file is part of the GNU LIBICONV Library. |
| * |
| * The GNU LIBICONV Library is free software; you can redistribute it |
| * and/or modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either version 2.1 |
| * of the License, or (at your option) any later version. |
| * |
| * The GNU LIBICONV Library 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with the GNU LIBICONV Library; see the file COPYING.LIB. |
| * If not, see <https://www.gnu.org/licenses/>. |
| */ |
| |
| /* |
| * BIG5-HKSCS:2004 |
| */ |
| |
| /* |
| * BIG5-HKSCS:2004 can be downloaded from |
| * http://www.info.gov.hk/digital21/eng/hkscs/download.html |
| * http://www.info.gov.hk/digital21/eng/hkscs/index.html |
| * |
| * It extends BIG5-HKSCS:2001 through 123 characters. |
| * |
| * It extends BIG5 (without the rows 0xC6..0xC7) through the ranges |
| * |
| * 0x{87..8D}{40..7E,A1..FE} 880 characters |
| * 0x{8E..A0}{40..7E,A1..FE} 2898 characters |
| * 0x{C6..C8}{40..7E,A1..FE} 359 characters |
| * 0xF9{D6..FE} 41 characters |
| * 0x{FA..FE}{40..7E,A1..FE} 763 characters |
| * |
| * Note that some HKSCS characters are not contained in Unicode 3.2 |
| * and are therefore best represented as sequences of Unicode characters: |
| * 0x8862 U+00CA U+0304 LATIN CAPITAL LETTER E WITH CIRCUMFLEX AND MACRON |
| * 0x8864 U+00CA U+030C LATIN CAPITAL LETTER E WITH CIRCUMFLEX AND CARON |
| * 0x88A3 U+00EA U+0304 LATIN SMALL LETTER E WITH CIRCUMFLEX AND MACRON |
| * 0x88A5 U+00EA U+030C LATIN SMALL LETTER E WITH CIRCUMFLEX AND CARON |
| */ |
| |
| #include "hkscs2004.h" |
| #include "flushwc.h" |
| |
| static int |
| big5hkscs2004_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n) |
| { |
| ucs4_t last_wc = conv->istate; |
| if (last_wc) { |
| /* Output the buffered character. */ |
| conv->istate = 0; |
| *pwc = last_wc; |
| return 0; /* Don't advance the input pointer. */ |
| } else { |
| unsigned char c = *s; |
| /* Code set 0 (ASCII) */ |
| if (c < 0x80) |
| return ascii_mbtowc(conv,pwc,s,n); |
| /* Code set 1 (BIG5 extended) */ |
| if (c >= 0xa1 && c < 0xff) { |
| if (n < 2) |
| return RET_TOOFEW(0); |
| { |
| unsigned char c2 = s[1]; |
| if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0xa1 && c2 < 0xff)) { |
| if (!((c == 0xc6 && c2 >= 0xa1) || c == 0xc7)) { |
| int ret = big5_mbtowc(conv,pwc,s,2); |
| if (ret != RET_ILSEQ) |
| return ret; |
| } |
| } |
| } |
| } |
| { |
| int ret = hkscs1999_mbtowc(conv,pwc,s,n); |
| if (ret != RET_ILSEQ) |
| return ret; |
| } |
| { |
| int ret = hkscs2001_mbtowc(conv,pwc,s,n); |
| if (ret != RET_ILSEQ) |
| return ret; |
| } |
| { |
| int ret = hkscs2004_mbtowc(conv,pwc,s,n); |
| if (ret != RET_ILSEQ) |
| return ret; |
| } |
| if (c == 0x88) { |
| if (n < 2) |
| return RET_TOOFEW(0); |
| { |
| unsigned char c2 = s[1]; |
| if (c2 == 0x62 || c2 == 0x64 || c2 == 0xa3 || c2 == 0xa5) { |
| /* It's a composed character. */ |
| ucs4_t wc1 = ((c2 >> 3) << 2) + 0x009a; /* = 0x00ca or 0x00ea */ |
| ucs4_t wc2 = ((c2 & 6) << 2) + 0x02fc; /* = 0x0304 or 0x030c */ |
| /* We cannot output two Unicode characters at once. So, |
| output the first character and buffer the second one. */ |
| *pwc = wc1; |
| conv->istate = wc2; |
| return 2; |
| } |
| } |
| } |
| return RET_ILSEQ; |
| } |
| } |
| |
| #define big5hkscs2004_flushwc normal_flushwc |
| |
| static int |
| big5hkscs2004_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n) |
| { |
| int count = 0; |
| unsigned char last = conv->ostate; |
| |
| if (last) { |
| /* last is = 0x66 or = 0xa7. */ |
| if (wc == 0x0304 || wc == 0x030c) { |
| /* Output the combined character. */ |
| if (n >= 2) { |
| r[0] = 0x88; |
| r[1] = last + ((wc & 24) >> 2) - 4; /* = 0x62 or 0x64 or 0xa3 or 0xa5 */ |
| conv->ostate = 0; |
| return 2; |
| } else |
| return RET_TOOSMALL; |
| } |
| |
| /* Output the buffered character. */ |
| if (n < 2) |
| return RET_TOOSMALL; |
| r[0] = 0x88; |
| r[1] = last; |
| r += 2; |
| count = 2; |
| } |
| |
| /* Code set 0 (ASCII) */ |
| if (wc < 0x0080) { |
| /* Plain ASCII character. */ |
| if (n > count) { |
| r[0] = (unsigned char) wc; |
| conv->ostate = 0; |
| return count+1; |
| } else |
| return RET_TOOSMALL; |
| } else { |
| unsigned char buf[2]; |
| int ret; |
| |
| /* Code set 1 (BIG5 extended) */ |
| ret = big5_wctomb(conv,buf,wc,2); |
| if (ret != RET_ILUNI) { |
| if (ret != 2) abort(); |
| if (!((buf[0] == 0xc6 && buf[1] >= 0xa1) || buf[0] == 0xc7)) { |
| if (n >= count+2) { |
| r[0] = buf[0]; |
| r[1] = buf[1]; |
| conv->ostate = 0; |
| return count+2; |
| } else |
| return RET_TOOSMALL; |
| } |
| } |
| ret = hkscs1999_wctomb(conv,buf,wc,2); |
| if (ret != RET_ILUNI) { |
| if (ret != 2) abort(); |
| if ((wc & ~0x0020) == 0x00ca) { |
| /* A possible first character of a multi-character sequence. We have to |
| buffer it. */ |
| if (!(buf[0] == 0x88 && (buf[1] == 0x66 || buf[1] == 0xa7))) abort(); |
| conv->ostate = buf[1]; /* = 0x66 or = 0xa7 */ |
| return count+0; |
| } |
| if (n >= count+2) { |
| r[0] = buf[0]; |
| r[1] = buf[1]; |
| conv->ostate = 0; |
| return count+2; |
| } else |
| return RET_TOOSMALL; |
| } |
| ret = hkscs2001_wctomb(conv,buf,wc,2); |
| if (ret != RET_ILUNI) { |
| if (ret != 2) abort(); |
| if (n >= count+2) { |
| r[0] = buf[0]; |
| r[1] = buf[1]; |
| conv->ostate = 0; |
| return count+2; |
| } else |
| return RET_TOOSMALL; |
| } |
| ret = hkscs2004_wctomb(conv,buf,wc,2); |
| if (ret != RET_ILUNI) { |
| if (ret != 2) abort(); |
| if (n >= count+2) { |
| r[0] = buf[0]; |
| r[1] = buf[1]; |
| conv->ostate = 0; |
| return count+2; |
| } else |
| return RET_TOOSMALL; |
| } |
| return RET_ILUNI; |
| } |
| } |
| |
| static int |
| big5hkscs2004_reset (conv_t conv, unsigned char *r, size_t n) |
| { |
| unsigned char last = conv->ostate; |
| |
| if (last) { |
| if (n < 2) |
| return RET_TOOSMALL; |
| r[0] = 0x88; |
| r[1] = last; |
| /* conv->ostate = 0; will be done by the caller */ |
| return 2; |
| } else |
| return 0; |
| } |
