mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-12-26 22:17:41 +00:00
cf214f8263
- libiconv 1.15 was released in February this year - I opened a thread to discuss if this should also be done for the lyX 2.3 branch on the list
247 lines
6.7 KiB
C
247 lines
6.7 KiB
C
/*
|
|
* Copyright (C) 1999-2002, 2006, 2010 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 Library General Public
|
|
* License as published by the Free Software Foundation; either version 2
|
|
* 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
|
|
* If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/*
|
|
* BIG5-HKSCS:2008
|
|
*/
|
|
|
|
/*
|
|
* BIG5-HKSCS:2008 can be downloaded from
|
|
* http://www.ogcio.gov.hk/ccli/eng/hkscs/download.html
|
|
* http://www.ogcio.gov.hk/ccli/eng/hkscs/introduction.html
|
|
*
|
|
* It extends BIG5-HKSCS:2004 through 68 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 "hkscs2008.h"
|
|
#include "flushwc.h"
|
|
|
|
static int
|
|
big5hkscs2008_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;
|
|
}
|
|
{
|
|
int ret = hkscs2008_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 big5hkscs2008_flushwc normal_flushwc
|
|
|
|
static int
|
|
big5hkscs2008_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;
|
|
}
|
|
ret = hkscs2008_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
|
|
big5hkscs2008_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;
|
|
}
|