/*
* Copyright (C) 1999-2001 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, write to the Free Software Foundation, Inc., 51 Franklin Street,
* Fifth Floor, Boston, MA 02110-1301, USA.
*/
/*
* ISO-2022-JP-2
*/
/* Specification: RFC 1554 */
/* ESC '(' 'I' for JISX0201 Katakana is an extension not found in RFC 1554 or
CJK.INF, but implemented in glibc-2.1 and qt-2.0. */
#define ESC 0x1b
/*
* The state is composed of one of the following values
*/
#define STATE_ASCII 0
#define STATE_JISX0201ROMAN 1
#define STATE_JISX0201KATAKANA 2
#define STATE_JISX0208 3
#define STATE_JISX0212 4
#define STATE_GB2312 5
#define STATE_KSC5601 6
/*
* and one of the following values, << 8
*/
#define STATE_G2_NONE 0
#define STATE_G2_ISO8859_1 1
#define STATE_G2_ISO8859_7 2
#define SPLIT_STATE \
unsigned int state1 = state & 0xff, state2 = state >> 8
#define COMBINE_STATE \
state = (state2 << 8) | state1
static int
iso2022_jp2_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
{
state_t state = conv->istate;
SPLIT_STATE;
int count = 0;
unsigned char c;
for (;;) {
c = *s;
if (c == ESC) {
if (n < count+3)
goto none;
if (s[1] == '(') {
if (s[2] == 'B') {
state1 = STATE_ASCII;
s += 3; count += 3;
if (n < count+1)
goto none;
continue;
}
if (s[2] == 'J') {
state1 = STATE_JISX0201ROMAN;
s += 3; count += 3;
if (n < count+1)
goto none;
continue;
}
if (s[2] == 'I') {
state1 = STATE_JISX0201KATAKANA;
s += 3; count += 3;
if (n < count+1)
goto none;
continue;
}
return RET_ILSEQ;
}
if (s[1] == '$') {
if (s[2] == '@' || s[2] == 'B') {
/* We don't distinguish JIS X 0208-1978 and JIS X 0208-1983. */
state1 = STATE_JISX0208;
s += 3; count += 3;
if (n < count+1)
goto none;
continue;
}
if (s[2] == 'A') {
state1 = STATE_GB2312;
s += 3; count += 3;
if (n < count+1)
goto none;
continue;
}
if (s[2] == '(') {
if (n < count+4)
goto none;
if (s[3] == 'D') {
state1 = STATE_JISX0212;
s += 4; count += 4;
if (n < count+1)
goto none;
continue;
}
if (s[3] == 'C') {
state1 = STATE_KSC5601;
s += 4; count += 4;
if (n < count+1)
goto none;
continue;
}
return RET_ILSEQ;
}
return RET_ILSEQ;
}
if (s[1] == '.') {
if (n < count+3)
goto none;
if (s[2] == 'A') {
state2 = STATE_G2_ISO8859_1;
s += 3; count += 3;
if (n < count+1)
goto none;
continue;
}
if (s[2] == 'F') {
state2 = STATE_G2_ISO8859_7;
s += 3; count += 3;
if (n < count+1)
goto none;
continue;
}
return RET_ILSEQ;
}
if (s[1] == 'N') {
switch (state2) {
case STATE_G2_NONE:
return RET_ILSEQ;
case STATE_G2_ISO8859_1:
if (s[2] < 0x80) {
unsigned char buf = s[2]+0x80;
int ret = iso8859_1_mbtowc(conv,pwc,&buf,1);
if (ret == RET_ILSEQ)
return RET_ILSEQ;
if (ret != 1) abort();
COMBINE_STATE;
conv->istate = state;
return count+3;
} else
return RET_ILSEQ;
case STATE_G2_ISO8859_7:
if (s[2] < 0x80) {
unsigned char buf = s[2]+0x80;
int ret = iso8859_7_mbtowc(conv,pwc,&buf,1);
if (ret == RET_ILSEQ)
return RET_ILSEQ;
if (ret != 1) abort();
COMBINE_STATE;
conv->istate = state;
return count+3;
} else
return RET_ILSEQ;
default: abort();
}
}
return RET_ILSEQ;
}
break;
}
switch (state1) {
case STATE_ASCII:
if (c < 0x80) {
int ret = ascii_mbtowc(conv,pwc,s,1);
if (ret == RET_ILSEQ)
return RET_ILSEQ;
if (ret != 1) abort();
if (*pwc == 0x000a || *pwc == 0x000d)
state2 = STATE_G2_NONE;
COMBINE_STATE;
conv->istate = state;
return count+1;
} else
return RET_ILSEQ;
case STATE_JISX0201ROMAN:
if (c < 0x80) {
int ret = jisx0201_mbtowc(conv,pwc,s,1);
if (ret == RET_ILSEQ)
return RET_ILSEQ;
if (ret != 1) abort();
if (*pwc == 0x000a || *pwc == 0x000d)
state2 = STATE_G2_NONE;
COMBINE_STATE;
conv->istate = state;
return count+1;
} else
return RET_ILSEQ;
case STATE_JISX0201KATAKANA:
if (c < 0x80) {
unsigned char buf = c+0x80;
int ret = jisx0201_mbtowc(conv,pwc,&buf,1);
if (ret == RET_ILSEQ)
return RET_ILSEQ;
if (ret != 1) abort();
COMBINE_STATE;
conv->istate = state;
return count+1;
} else
return RET_ILSEQ;
case STATE_JISX0208:
if (n < count+2)
goto none;
if (s[0] < 0x80 && s[1] < 0x80) {
int ret = jisx0208_mbtowc(conv,pwc,s,2);
if (ret == RET_ILSEQ)
return RET_ILSEQ;
if (ret != 2) abort();
COMBINE_STATE;
conv->istate = state;
return count+2;
} else
return RET_ILSEQ;
case STATE_JISX0212:
if (n < count+2)
goto none;
if (s[0] < 0x80 && s[1] < 0x80) {
int ret = jisx0212_mbtowc(conv,pwc,s,2);
if (ret == RET_ILSEQ)
return RET_ILSEQ;
if (ret != 2) abort();
COMBINE_STATE;
conv->istate = state;
return count+2;
} else
return RET_ILSEQ;
case STATE_GB2312:
if (n < count+2)
goto none;
if (s[0] < 0x80 && s[1] < 0x80) {
int ret = gb2312_mbtowc(conv,pwc,s,2);
if (ret == RET_ILSEQ)
return RET_ILSEQ;
if (ret != 2) abort();
COMBINE_STATE;
conv->istate = state;
return count+2;
} else
return RET_ILSEQ;
case STATE_KSC5601:
if (n < count+2)
goto none;
if (s[0] < 0x80 && s[1] < 0x80) {
int ret = ksc5601_mbtowc(conv,pwc,s,2);
if (ret == RET_ILSEQ)
return RET_ILSEQ;
if (ret != 2) abort();
COMBINE_STATE;
conv->istate = state;
return count+2;
} else
return RET_ILSEQ;
default: abort();
}
none:
COMBINE_STATE;
conv->istate = state;
return RET_TOOFEW(count);
}
#undef COMBINE_STATE
#undef SPLIT_STATE
/*
* The state can also contain one of the following values, << 16.
* Values >= STATE_TAG_LANGUAGE are temporary tag parsing states.
*/
#define STATE_TAG_NONE 0
#define STATE_TAG_LANGUAGE 4
#define STATE_TAG_LANGUAGE_j 5
#define STATE_TAG_LANGUAGE_ja 1
#define STATE_TAG_LANGUAGE_k 6
#define STATE_TAG_LANGUAGE_ko 2
#define STATE_TAG_LANGUAGE_z 7
#define STATE_TAG_LANGUAGE_zh 3
#define SPLIT_STATE \
unsigned int state1 = state & 0xff, state2 = (state >> 8) & 0xff, state3 = state >> 16
#define COMBINE_STATE \
state = (state3 << 16) | (state2 << 8) | state1
static int
iso2022_jp2_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
{
state_t state = conv->ostate;
SPLIT_STATE;
unsigned char buf[2];
int ret;
/* This defines the conversion preferences depending on the current
langauge tag. */
enum conversion { none = 0, european, japanese, chinese, korean, other };
static const unsigned int conversion_lists[STATE_TAG_LANGUAGE] = {
/* STATE_TAG_NONE */
japanese + (european << 3) + (chinese << 6) + (korean << 9) + (other << 12),
/* STATE_TAG_LANGUAGE_ja */
japanese + (european << 3) + (chinese << 6) + (korean << 9) + (other << 12),
/* STATE_TAG_LANGUAGE_ko */
korean + (european << 3) + (japanese << 6) + (chinese << 9) + (other << 12),
/* STATE_TAG_LANGUAGE_zh */
chinese + (european << 3) + (japanese << 6) + (korean << 9) + (other << 12)
};
unsigned int conversion_list;
/* Handle Unicode tag characters (range U+E0000..U+E007F). */
if ((wc >> 7) == (0xe0000 >> 7)) {
char c = wc & 0x7f;
if (c >= 'A' && c <= 'Z')
c += 'a'-'A';
switch (c) {
case 0x01:
state3 = STATE_TAG_LANGUAGE;
COMBINE_STATE;
conv->ostate = state;
return 0;
case 'j':
if (state3 == STATE_TAG_LANGUAGE) {
state3 = STATE_TAG_LANGUAGE_j;
COMBINE_STATE;
conv->ostate = state;
return 0;
}
break;
case 'a':
if (state3 == STATE_TAG_LANGUAGE_j) {
state3 = STATE_TAG_LANGUAGE_ja;
COMBINE_STATE;
conv->ostate = state;
return 0;
}
break;
case 'k':
if (state3 == STATE_TAG_LANGUAGE) {
state3 = STATE_TAG_LANGUAGE_k;
COMBINE_STATE;
conv->ostate = state;
return 0;
}
break;
case 'o':
if (state3 == STATE_TAG_LANGUAGE_k) {
state3 = STATE_TAG_LANGUAGE_ko;
COMBINE_STATE;
conv->ostate = state;
return 0;
}
break;
case 'z':
if (state3 == STATE_TAG_LANGUAGE) {
state3 = STATE_TAG_LANGUAGE_z;
COMBINE_STATE;
conv->ostate = state;
return 0;
}
break;
case 'h':
if (state3 == STATE_TAG_LANGUAGE_z) {
state3 = STATE_TAG_LANGUAGE_zh;
COMBINE_STATE;
conv->ostate = state;
return 0;
}
break;
case 0x7f:
state3 = STATE_TAG_NONE;
COMBINE_STATE;
conv->ostate = state;
return 0;
default:
break;
}
/* Other tag characters reset the tag parsing state or are ignored. */
if (state3 >= STATE_TAG_LANGUAGE)
state3 = STATE_TAG_NONE;
COMBINE_STATE;
conv->ostate = state;
return 0;
}
if (state3 >= STATE_TAG_LANGUAGE)
state3 = STATE_TAG_NONE;
/* Try ASCII. */
ret = ascii_wctomb(conv,buf,wc,1);
if (ret != RET_ILUNI) {
if (ret != 1) abort();
if (buf[0] < 0x80) {
int count = (state1 == STATE_ASCII ? 1 : 4);
if (n < count)
return RET_TOOSMALL;
if (state1 != STATE_ASCII) {
r[0] = ESC;
r[1] = '(';
r[2] = 'B';
r += 3;
state1 = STATE_ASCII;
}
r[0] = buf[0];
if (wc == 0x000a || wc == 0x000d)
state2 = STATE_G2_NONE;
COMBINE_STATE;
conv->ostate = state;
return count;
}
}
conversion_list = conversion_lists[state3];
do {
switch (conversion_list & ((1 << 3) - 1)) {
case european:
/* Try ISO-8859-1. */
ret = iso8859_1_wctomb(conv,buf,wc,1);
if (ret != RET_ILUNI) {
if (ret != 1) abort();
if (buf[0] >= 0x80) {
int count = (state2 == STATE_G2_ISO8859_1 ? 3 : 6);
if (n < count)
return RET_TOOSMALL;
if (state2 != STATE_G2_ISO8859_1) {
r[0] = ESC;
r[1] = '.';
r[2] = 'A';
r += 3;
state2 = STATE_G2_ISO8859_1;
}
r[0] = ESC;
r[1] = 'N';
r[2] = buf[0]-0x80;
COMBINE_STATE;
conv->ostate = state;
return count;
}
}
/* Try ISO-8859-7. */
ret = iso8859_7_wctomb(conv,buf,wc,1);
if (ret != RET_ILUNI) {
if (ret != 1) abort();
if (buf[0] >= 0x80) {
int count = (state2 == STATE_G2_ISO8859_7 ? 3 : 6);
if (n < count)
return RET_TOOSMALL;
if (state2 != STATE_G2_ISO8859_7) {
r[0] = ESC;
r[1] = '.';
r[2] = 'F';
r += 3;
state2 = STATE_G2_ISO8859_7;
}
r[0] = ESC;
r[1] = 'N';
r[2] = buf[0]-0x80;
COMBINE_STATE;
conv->ostate = state;
return count;
}
}
break;
case japanese:
/* Try JIS X 0201-1976 Roman. */
ret = jisx0201_wctomb(conv,buf,wc,1);
if (ret != RET_ILUNI) {
if (ret != 1) abort();
if (buf[0] < 0x80) {
int count = (state1 == STATE_JISX0201ROMAN ? 1 : 4);
if (n < count)
return RET_TOOSMALL;
if (state1 != STATE_JISX0201ROMAN) {
r[0] = ESC;
r[1] = '(';
r[2] = 'J';
r += 3;
state1 = STATE_JISX0201ROMAN;
}
r[0] = buf[0];
if (wc == 0x000a || wc == 0x000d)
state2 = STATE_G2_NONE;
COMBINE_STATE;
conv->ostate = state;
return count;
}
}
/* Try JIS X 0208-1990 in place of JIS X 0208-1978 and
JIS X 0208-1983. */
ret = jisx0208_wctomb(conv,buf,wc,2);
if (ret != RET_ILUNI) {
if (ret != 2) abort();
if (buf[0] < 0x80 && buf[1] < 0x80) {
int count = (state1 == STATE_JISX0208 ? 2 : 5);
if (n < count)
return RET_TOOSMALL;
if (state1 != STATE_JISX0208) {
r[0] = ESC;
r[1] = '$';
r[2] = 'B';
r += 3;
state1 = STATE_JISX0208;
}
r[0] = buf[0];
r[1] = buf[1];
COMBINE_STATE;
conv->ostate = state;
return count;
}
}
/* Try JIS X 0212-1990. */
ret = jisx0212_wctomb(conv,buf,wc,2);
if (ret != RET_ILUNI) {
if (ret != 2) abort();
if (buf[0] < 0x80 && buf[1] < 0x80) {
int count = (state1 == STATE_JISX0212 ? 2 : 6);
if (n < count)
return RET_TOOSMALL;
if (state1 != STATE_JISX0212) {
r[0] = ESC;
r[1] = '$';
r[2] = '(';
r[3] = 'D';
r += 4;
state1 = STATE_JISX0212;
}
r[0] = buf[0];
r[1] = buf[1];
COMBINE_STATE;
conv->ostate = state;
return count;
}
}
break;
case chinese:
/* Try GB 2312-1980. */
ret = gb2312_wctomb(conv,buf,wc,2);
if (ret != RET_ILUNI) {
if (ret != 2) abort();
if (buf[0] < 0x80 && buf[1] < 0x80) {
int count = (state1 == STATE_GB2312 ? 2 : 5);
if (n < count)
return RET_TOOSMALL;
if (state1 != STATE_GB2312) {
r[0] = ESC;
r[1] = '$';
r[2] = 'A';
r += 3;
state1 = STATE_GB2312;
}
r[0] = buf[0];
r[1] = buf[1];
COMBINE_STATE;
conv->ostate = state;
return count;
}
}
break;
case korean:
/* Try KS C 5601-1992. */
ret = ksc5601_wctomb(conv,buf,wc,2);
if (ret != RET_ILUNI) {
if (ret != 2) abort();
if (buf[0] < 0x80 && buf[1] < 0x80) {
int count = (state1 == STATE_KSC5601 ? 2 : 6);
if (n < count)
return RET_TOOSMALL;
if (state1 != STATE_KSC5601) {
r[0] = ESC;
r[1] = '$';
r[2] = '(';
r[3] = 'C';
r += 4;
state1 = STATE_KSC5601;
}
r[0] = buf[0];
r[1] = buf[1];
COMBINE_STATE;
conv->ostate = state;
return count;
}
}
break;
case other:
/* Try JIS X 0201-1976 Kana. This is not officially part of
ISO-2022-JP-2, according to RFC 1554. Therefore we try this
only after all other attempts. */
ret = jisx0201_wctomb(conv,buf,wc,1);
if (ret != RET_ILUNI) {
if (ret != 1) abort();
if (buf[0] >= 0x80) {
int count = (state1 == STATE_JISX0201KATAKANA ? 1 : 4);
if (n < count)
return RET_TOOSMALL;
if (state1 != STATE_JISX0201KATAKANA) {
r[0] = ESC;
r[1] = '(';
r[2] = 'I';
r += 3;
state1 = STATE_JISX0201KATAKANA;
}
r[0] = buf[0]-0x80;
COMBINE_STATE;
conv->ostate = state;
return count;
}
}
break;
default:
abort();
}
conversion_list = conversion_list >> 3;
} while (conversion_list != 0);
return RET_ILUNI;
}
static int
iso2022_jp2_reset (conv_t conv, unsigned char *r, int n)
{
state_t state = conv->ostate;
SPLIT_STATE;
(void)state2;
(void)state3;
if (state1 != STATE_ASCII) {
if (n < 3)
return RET_TOOSMALL;
r[0] = ESC;
r[1] = '(';
r[2] = 'B';
/* conv->ostate = 0; will be done by the caller */
return 3;
} else
return 0;
}
#undef COMBINE_STATE
#undef SPLIT_STATE
#undef STATE_TAG_LANGUAGE_zh
#undef STATE_TAG_LANGUAGE_z
#undef STATE_TAG_LANGUAGE_ko
#undef STATE_TAG_LANGUAGE_k
#undef STATE_TAG_LANGUAGE_ja
#undef STATE_TAG_LANGUAGE_j
#undef STATE_TAG_LANGUAGE
#undef STATE_TAG_NONE
#undef STATE_G2_ISO8859_7
#undef STATE_G2_ISO8859_1
#undef STATE_G2_NONE
#undef STATE_KSC5601
#undef STATE_GB2312
#undef STATE_JISX0212
#undef STATE_JISX0208
#undef STATE_JISX0201KATAKANA
#undef STATE_JISX0201ROMAN
#undef STATE_ASCII
