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/*
* _iso2022_jp_3.c: the ISO-2022-JP-3 codec (JIS X 0213)
*
* Written by Hye-Shik Chang <perky@FreeBSD.org>
* $CJKCodecs: _iso2022_jp_3.c,v 1.7 2003/12/31 05:46:55 perky Exp $
*/
#define USING_BINARY_PAIR_SEARCH
#define ISO2022_DESIGNATIONS \
CHARSET_ASCII, CHARSET_JISX0208, CHARSET_JISX0213_1, CHARSET_JISX0213_2
#define ISO2022_NO_SHIFT
#define ISO2022_USE_JISX0208EXT
#include "codeccommon.h"
#include "iso2022common.h"
#include "map_jisx0213_pairs.h"
ENCMAP(jisxcommon)
DECMAP(jisx0208)
DECMAP(jisx0212)
ENCMAP(jisx0213_bmp)
DECMAP(jisx0213_1_bmp)
DECMAP(jisx0213_2_bmp)
ENCMAP(jisx0213_emp)
DECMAP(jisx0213_1_emp)
DECMAP(jisx0213_2_emp)
#define EMPBASE 0x20000
#define HAVE_ENCODER_INIT
ENCODER_INIT(iso2022_jp_3)
{
STATE_CLEARFLAGS(state)
STATE_SETG0(state, CHARSET_ASCII)
STATE_SETG1(state, CHARSET_ASCII)
return 0;
}
#define HAVE_ENCODER_RESET
ENCODER_RESET(iso2022_jp_3)
{
if (STATE_GETG0(state) != CHARSET_ASCII) {
WRITE3(ESC, '(', 'B')
STATE_SETG0(state, CHARSET_ASCII)
NEXT_OUT(3)
}
return 0;
}
ENCODER(iso2022_jp_3)
{
while (inleft > 0) {
unsigned char charset;
ucs4_t c = IN1;
DBCHAR code;
size_t insize;
if (c < 0x80) {
switch (STATE_GETG0(state)) {
case CHARSET_ASCII:
WRITE1(c)
NEXT(1, 1)
break;
default:
WRITE4(ESC, '(', 'B', c)
STATE_SETG0(state, CHARSET_ASCII)
NEXT(1, 4)
break;
}
if (c == '\n')
STATE_CLEARFLAG(state, F_SHIFTED)
continue;
}
DECODE_SURROGATE(c)
insize = GET_INSIZE(c);
if (c <= 0xffff) {
TRYMAP_ENC(jisx0213_bmp, code, c) {
if (code == MULTIC) {
if (inleft < 2) {
if (flags & MBENC_FLUSH) {
code = find_pairencmap(c, 0, jisx0213_pairencmap,
JISX0213_ENCPAIRS);
if (code == DBCINV)
return 1;
} else
return MBERR_TOOFEW;
} else {
code = find_pairencmap(c, IN2,
jisx0213_pairencmap, JISX0213_ENCPAIRS);
if (code == DBCINV) {
code = find_pairencmap(c, 0, jisx0213_pairencmap,
JISX0213_ENCPAIRS);
if (code == DBCINV)
return 1;
} else
insize = 2;
}
}
} else TRYMAP_ENC(jisxcommon, code, c) {
if (code & 0x8000)
return 1; /* avoid JIS X 0212 codes */
} else if (c == 0xff3c) /* F/W REVERSE SOLIDUS */
code = 0x2140;
else
return 1;
} else if (c >> 16 == EMPBASE >> 16) {
TRYMAP_ENC(jisx0213_emp, code, c & 0xffff);
else return insize;
} else
return insize;
charset = STATE_GETG0(state);
if (code & 0x8000) { /* MSB set: Plane 2 */
if (charset != CHARSET_JISX0213_2) {
WRITE4(ESC, '$', '(', 'P')
STATE_SETG0(state, CHARSET_JISX0213_2)
NEXT_OUT(4)
}
WRITE2((code >> 8) & 0x7f, code & 0x7f)
} else { /* MSB unset: Plane 1 */
if (charset != CHARSET_JISX0213_1) {
WRITE4(ESC, '$', '(', 'O')
STATE_SETG0(state, CHARSET_JISX0213_1)
NEXT_OUT(4)
}
WRITE2(code >> 8, code & 0xff)
}
NEXT(insize, 2)
}
return 0;
}
#define HAVE_DECODER_INIT
DECODER_INIT(iso2022_jp_3)
{
STATE_CLEARFLAGS(state)
STATE_SETG0(state, CHARSET_ASCII)
STATE_SETG1(state, CHARSET_ASCII)
return 0;
}
#define HAVE_DECODER_RESET
DECODER_RESET(iso2022_jp_3)
{
STATE_CLEARFLAG(state, F_SHIFTED)
return 0;
}
DECODER(iso2022_jp_3)
{
ISO2022_LOOP_BEGIN
unsigned char charset, c2;
ucs4_t code;
ISO2022_GETCHARSET(charset, c)
if (charset & CHARSET_DOUBLEBYTE) {
RESERVE_INBUF(2)
RESERVE_OUTBUF(1)
c2 = IN2;
if (charset == CHARSET_JISX0213_1) {
if (c == 0x21 && c2 == 0x40) **outbuf = 0xff3c;
else TRYMAP_DEC(jisx0208, **outbuf, c, c2);
else TRYMAP_DEC(jisx0213_1_bmp, **outbuf, c, c2);
else TRYMAP_DEC(jisx0213_1_emp, code, c, c2) {
PUTUCS4(EMPBASE | code)
NEXT_IN(2)
continue;
} else TRYMAP_DEC(jisx0213_pair, code, c, c2) {
WRITE2(code >> 16, code & 0xffff)
NEXT(2, 2)
continue;
} else return 2;
} else if (charset == CHARSET_JISX0213_2) {
TRYMAP_DEC(jisx0213_2_bmp, **outbuf, c, c2);
else TRYMAP_DEC(jisx0213_2_emp, code, c, c2) {
PUTUCS4(EMPBASE | code)
NEXT_IN(2)
continue;
} else return 2;
} else
return MBERR_INTERNAL;
NEXT(2, 1)
} else if (charset == CHARSET_ASCII) {
RESERVE_OUTBUF(1)
OUT1(c)
NEXT(1, 1)
} else
return MBERR_INTERNAL;
ISO2022_LOOP_END
return 0;
}
#include "codecentry.h"
BEGIN_CODEC_REGISTRY(iso2022_jp_3)
MAPOPEN(ja_JP)
IMPORTMAP_DEC(jisx0208)
IMPORTMAP_DEC(jisx0212)
IMPORTMAP_ENC(jisxcommon)
IMPORTMAP_ENC(jisx0213_bmp)
IMPORTMAP_DEC(jisx0213_1_bmp)
IMPORTMAP_DEC(jisx0213_2_bmp)
IMPORTMAP_ENC(jisx0213_emp)
IMPORTMAP_DEC(jisx0213_1_emp)
IMPORTMAP_DEC(jisx0213_2_emp)
MAPCLOSE()
END_CODEC_REGISTRY(iso2022_jp_3)
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