538 lines
15 KiB
C
538 lines
15 KiB
C
/*
|
|
* Copyright (C) 1999-2004, 2008 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-3
|
|
*/
|
|
|
|
#include "jisx0213.h"
|
|
|
|
#define ESC 0x1b
|
|
|
|
/*
|
|
* The state is composed of one of the following values
|
|
*/
|
|
#define STATE_ASCII 0 /* Esc ( B */
|
|
#define STATE_JISX0201ROMAN 1 /* Esc ( J */
|
|
#define STATE_JISX0201KATAKANA 2 /* Esc ( I */
|
|
#define STATE_JISX0208 3 /* Esc $ @ or Esc $ B */
|
|
#define STATE_JISX02131 4 /* Esc $ ( O or Esc $ ( Q*/
|
|
#define STATE_JISX02132 5 /* Esc $ ( P */
|
|
|
|
/*
|
|
* In the ISO-2022-JP-3 to UCS-4 direction, the state also holds the last
|
|
* character to be output, shifted by 3 bits.
|
|
*/
|
|
|
|
static int
|
|
iso2022_jp3_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
|
|
{
|
|
ucs4_t last_wc = conv->istate >> 3;
|
|
if (last_wc) {
|
|
/* Output the buffered character. */
|
|
conv->istate &= 7;
|
|
*pwc = last_wc;
|
|
return 0; /* Don't advance the input pointer. */
|
|
} else {
|
|
state_t state = conv->istate;
|
|
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') {
|
|
state = STATE_ASCII;
|
|
s += 3; count += 3;
|
|
if (n < count+1)
|
|
goto none;
|
|
continue;
|
|
}
|
|
if (s[2] == 'J') {
|
|
state = STATE_JISX0201ROMAN;
|
|
s += 3; count += 3;
|
|
if (n < count+1)
|
|
goto none;
|
|
continue;
|
|
}
|
|
if (s[2] == 'I') {
|
|
state = STATE_JISX0201KATAKANA;
|
|
s += 3; count += 3;
|
|
if (n < count+1)
|
|
goto none;
|
|
continue;
|
|
}
|
|
goto ilseq;
|
|
}
|
|
if (s[1] == '$') {
|
|
if (s[2] == '@' || s[2] == 'B') {
|
|
/* We don't distinguish JIS X 0208-1978 and JIS X 0208-1983. */
|
|
state = STATE_JISX0208;
|
|
s += 3; count += 3;
|
|
if (n < count+1)
|
|
goto none;
|
|
continue;
|
|
}
|
|
if (s[2] == '(') {
|
|
if (n < count+4)
|
|
goto none;
|
|
if (s[3] == 'O' || s[3] == 'Q') {
|
|
state = STATE_JISX02131;
|
|
s += 4; count += 4;
|
|
if (n < count+1)
|
|
goto none;
|
|
continue;
|
|
}
|
|
if (s[3] == 'P') {
|
|
state = STATE_JISX02132;
|
|
s += 4; count += 4;
|
|
if (n < count+1)
|
|
goto none;
|
|
continue;
|
|
}
|
|
}
|
|
goto ilseq;
|
|
}
|
|
goto ilseq;
|
|
}
|
|
break;
|
|
}
|
|
switch (state) {
|
|
case STATE_ASCII:
|
|
if (c < 0x80) {
|
|
int ret = ascii_mbtowc(conv,pwc,s,1);
|
|
if (ret == RET_ILSEQ)
|
|
goto ilseq;
|
|
if (ret != 1) abort();
|
|
conv->istate = state;
|
|
return count+1;
|
|
} else
|
|
goto ilseq;
|
|
case STATE_JISX0201ROMAN:
|
|
if (c < 0x80) {
|
|
int ret = jisx0201_mbtowc(conv,pwc,s,1);
|
|
if (ret == RET_ILSEQ)
|
|
goto ilseq;
|
|
if (ret != 1) abort();
|
|
conv->istate = state;
|
|
return count+1;
|
|
} else
|
|
goto ilseq;
|
|
case STATE_JISX0201KATAKANA:
|
|
if (c < 0x80) {
|
|
unsigned char buf = c+0x80;
|
|
int ret = jisx0201_mbtowc(conv,pwc,&buf,1);
|
|
if (ret == RET_ILSEQ)
|
|
goto ilseq;
|
|
if (ret != 1) abort();
|
|
conv->istate = state;
|
|
return count+1;
|
|
} else
|
|
goto 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)
|
|
goto ilseq;
|
|
if (ret != 2) abort();
|
|
conv->istate = state;
|
|
return count+2;
|
|
} else
|
|
goto ilseq;
|
|
case STATE_JISX02131:
|
|
case STATE_JISX02132:
|
|
if (n < count+2)
|
|
goto none;
|
|
if (s[0] < 0x80 && s[1] < 0x80) {
|
|
ucs4_t wc = jisx0213_to_ucs4(((state-STATE_JISX02131+1)<<8)+s[0],s[1]);
|
|
if (wc) {
|
|
if (wc < 0x80) {
|
|
/* It's a combining character. */
|
|
ucs4_t wc1 = jisx0213_to_ucs_combining[wc - 1][0];
|
|
ucs4_t wc2 = jisx0213_to_ucs_combining[wc - 1][1];
|
|
/* We cannot output two Unicode characters at once. So,
|
|
output the first character and buffer the second one. */
|
|
*pwc = wc1;
|
|
conv->istate = (wc2 << 3) | state;
|
|
} else {
|
|
*pwc = wc;
|
|
conv->istate = state;
|
|
}
|
|
return count+2;
|
|
}
|
|
}
|
|
goto ilseq;
|
|
default: abort();
|
|
}
|
|
none:
|
|
conv->istate = state;
|
|
return RET_TOOFEW(count);
|
|
|
|
ilseq:
|
|
conv->istate = state;
|
|
return RET_SHIFT_ILSEQ(count);
|
|
}
|
|
}
|
|
|
|
static int
|
|
iso2022_jp3_flushwc (conv_t conv, ucs4_t *pwc)
|
|
{
|
|
ucs4_t last_wc = conv->istate >> 3;
|
|
if (last_wc) {
|
|
/* Output the buffered character. */
|
|
conv->istate &= 7;
|
|
*pwc = last_wc;
|
|
return 1;
|
|
} else
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* In the UCS-4 to ISO-2022-JP-3 direction, the state also holds the last two
|
|
* bytes to be output, shifted by 3 bits, and the STATE_xxxxx value that was
|
|
* effective before this buffered character, shifted by 19 bits.
|
|
*/
|
|
|
|
/* Composition tables for each of the relevant combining characters. */
|
|
static const struct { unsigned short base; unsigned short composed; } iso2022_jp3_comp_table_data[] = {
|
|
#define iso2022_jp3_comp_table02e5_idx 0
|
|
#define iso2022_jp3_comp_table02e5_len 1
|
|
{ 0x2b64, 0x2b65 }, /* 0x12B65 = 0x12B64 U+02E5 */
|
|
#define iso2022_jp3_comp_table02e9_idx (iso2022_jp3_comp_table02e5_idx+iso2022_jp3_comp_table02e5_len)
|
|
#define iso2022_jp3_comp_table02e9_len 1
|
|
{ 0x2b60, 0x2b66 }, /* 0x12B66 = 0x12B60 U+02E9 */
|
|
#define iso2022_jp3_comp_table0300_idx (iso2022_jp3_comp_table02e9_idx+iso2022_jp3_comp_table02e9_len)
|
|
#define iso2022_jp3_comp_table0300_len 5
|
|
{ 0x295c, 0x2b44 }, /* 0x12B44 = 0x1295C U+0300 */
|
|
{ 0x2b38, 0x2b48 }, /* 0x12B48 = 0x12B38 U+0300 */
|
|
{ 0x2b37, 0x2b4a }, /* 0x12B4A = 0x12B37 U+0300 */
|
|
{ 0x2b30, 0x2b4c }, /* 0x12B4C = 0x12B30 U+0300 */
|
|
{ 0x2b43, 0x2b4e }, /* 0x12B4E = 0x12B43 U+0300 */
|
|
#define iso2022_jp3_comp_table0301_idx (iso2022_jp3_comp_table0300_idx+iso2022_jp3_comp_table0300_len)
|
|
#define iso2022_jp3_comp_table0301_len 4
|
|
{ 0x2b38, 0x2b49 }, /* 0x12B49 = 0x12B38 U+0301 */
|
|
{ 0x2b37, 0x2b4b }, /* 0x12B4B = 0x12B37 U+0301 */
|
|
{ 0x2b30, 0x2b4d }, /* 0x12B4D = 0x12B30 U+0301 */
|
|
{ 0x2b43, 0x2b4f }, /* 0x12B4F = 0x12B43 U+0301 */
|
|
#define iso2022_jp3_comp_table309a_idx (iso2022_jp3_comp_table0301_idx+iso2022_jp3_comp_table0301_len)
|
|
#define iso2022_jp3_comp_table309a_len 14
|
|
{ 0x242b, 0x2477 }, /* 0x12477 = 0x1242B U+309A */
|
|
{ 0x242d, 0x2478 }, /* 0x12478 = 0x1242D U+309A */
|
|
{ 0x242f, 0x2479 }, /* 0x12479 = 0x1242F U+309A */
|
|
{ 0x2431, 0x247a }, /* 0x1247A = 0x12431 U+309A */
|
|
{ 0x2433, 0x247b }, /* 0x1247B = 0x12433 U+309A */
|
|
{ 0x252b, 0x2577 }, /* 0x12577 = 0x1252B U+309A */
|
|
{ 0x252d, 0x2578 }, /* 0x12578 = 0x1252D U+309A */
|
|
{ 0x252f, 0x2579 }, /* 0x12579 = 0x1252F U+309A */
|
|
{ 0x2531, 0x257a }, /* 0x1257A = 0x12531 U+309A */
|
|
{ 0x2533, 0x257b }, /* 0x1257B = 0x12533 U+309A */
|
|
{ 0x253b, 0x257c }, /* 0x1257C = 0x1253B U+309A */
|
|
{ 0x2544, 0x257d }, /* 0x1257D = 0x12544 U+309A */
|
|
{ 0x2548, 0x257e }, /* 0x1257E = 0x12548 U+309A */
|
|
{ 0x2675, 0x2678 }, /* 0x12678 = 0x12675 U+309A */
|
|
};
|
|
|
|
#define SPLIT_STATE \
|
|
unsigned short lasttwo = state >> 3; state_t prevstate = state >> 19; state &= 7
|
|
#define COMBINE_STATE \
|
|
state |= (prevstate << 19) | (lasttwo << 3)
|
|
#define COMBINE_STATE_NO_LASTTWO \
|
|
/* assume lasttwo == 0, then prevstate is ignored */
|
|
|
|
static int
|
|
iso2022_jp3_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
|
|
{
|
|
int count = 0;
|
|
unsigned char buf[2];
|
|
unsigned short jch;
|
|
int ret;
|
|
state_t state = conv->ostate;
|
|
SPLIT_STATE;
|
|
|
|
if (lasttwo) {
|
|
/* Attempt to combine the last character with this one. */
|
|
unsigned int idx;
|
|
unsigned int len;
|
|
|
|
if (wc == 0x02e5)
|
|
idx = iso2022_jp3_comp_table02e5_idx,
|
|
len = iso2022_jp3_comp_table02e5_len;
|
|
else if (wc == 0x02e9)
|
|
idx = iso2022_jp3_comp_table02e9_idx,
|
|
len = iso2022_jp3_comp_table02e9_len;
|
|
else if (wc == 0x0300)
|
|
idx = iso2022_jp3_comp_table0300_idx,
|
|
len = iso2022_jp3_comp_table0300_len;
|
|
else if (wc == 0x0301)
|
|
idx = iso2022_jp3_comp_table0301_idx,
|
|
len = iso2022_jp3_comp_table0301_len;
|
|
else if (wc == 0x309a)
|
|
idx = iso2022_jp3_comp_table309a_idx,
|
|
len = iso2022_jp3_comp_table309a_len;
|
|
else
|
|
goto not_combining;
|
|
|
|
do
|
|
if (iso2022_jp3_comp_table_data[idx].base == lasttwo)
|
|
break;
|
|
while (++idx, --len > 0);
|
|
|
|
if (len > 0) {
|
|
/* Output the combined character. */
|
|
/* We know the combined character is in JISX0213 plane 1, but
|
|
the buffered character may have been in JISX0208 or in
|
|
JISX0213 plane 1. */
|
|
count = (state != STATE_JISX02131 ? 4 : 0) + 2;
|
|
if (n < count)
|
|
return RET_TOOSMALL;
|
|
if (state != STATE_JISX02131) {
|
|
r[0] = ESC;
|
|
r[1] = '$';
|
|
r[2] = '(';
|
|
r[3] = 'Q';
|
|
r += 4;
|
|
state = STATE_JISX02131;
|
|
}
|
|
lasttwo = iso2022_jp3_comp_table_data[idx].composed;
|
|
r[0] = (lasttwo >> 8) & 0xff;
|
|
r[1] = lasttwo & 0xff;
|
|
COMBINE_STATE_NO_LASTTWO;
|
|
conv->ostate = state;
|
|
return count;
|
|
}
|
|
|
|
not_combining:
|
|
/* Output the buffered character. */
|
|
/* We know it is in JISX0208 or in JISX0213 plane 1. */
|
|
count = (prevstate != state ? 3 : 0) + 2;
|
|
if (n < count)
|
|
return RET_TOOSMALL;
|
|
if (prevstate != state) {
|
|
if (state != STATE_JISX0208) abort();
|
|
r[0] = ESC;
|
|
r[1] = '$';
|
|
r[2] = 'B';
|
|
r += 3;
|
|
}
|
|
r[0] = (lasttwo >> 8) & 0xff;
|
|
r[1] = lasttwo & 0xff;
|
|
r += 2;
|
|
}
|
|
|
|
/* Try ASCII. */
|
|
ret = ascii_wctomb(conv,buf,wc,1);
|
|
if (ret != RET_ILUNI) {
|
|
if (ret != 1) abort();
|
|
if (buf[0] < 0x80) {
|
|
count += (state == STATE_ASCII ? 1 : 4);
|
|
if (n < count)
|
|
return RET_TOOSMALL;
|
|
if (state != STATE_ASCII) {
|
|
r[0] = ESC;
|
|
r[1] = '(';
|
|
r[2] = 'B';
|
|
r += 3;
|
|
state = STATE_ASCII;
|
|
}
|
|
r[0] = buf[0];
|
|
COMBINE_STATE_NO_LASTTWO;
|
|
conv->ostate = state;
|
|
return count;
|
|
}
|
|
}
|
|
|
|
/* Try JIS X 0201-1976 Roman. */
|
|
ret = jisx0201_wctomb(conv,buf,wc,1);
|
|
if (ret != RET_ILUNI) {
|
|
if (ret != 1) abort();
|
|
if (buf[0] < 0x80) {
|
|
count += (state == STATE_JISX0201ROMAN ? 1 : 4);
|
|
if (n < count)
|
|
return RET_TOOSMALL;
|
|
if (state != STATE_JISX0201ROMAN) {
|
|
r[0] = ESC;
|
|
r[1] = '(';
|
|
r[2] = 'J';
|
|
r += 3;
|
|
state = STATE_JISX0201ROMAN;
|
|
}
|
|
r[0] = buf[0];
|
|
COMBINE_STATE_NO_LASTTWO;
|
|
conv->ostate = state;
|
|
return count;
|
|
}
|
|
}
|
|
|
|
jch = ucs4_to_jisx0213(wc);
|
|
|
|
/* Try JIS X 0208-1990 in place of JIS X 0208-1978 and JIS X 0208-1983. */
|
|
ret = jisx0208_wctomb(conv,buf,wc,2);
|
|
if (ret != RET_ILUNI) {
|
|
if (ret != 2) abort();
|
|
if (buf[0] < 0x80 && buf[1] < 0x80) {
|
|
if (jch & 0x0080) {
|
|
/* A possible match in comp_table_data. Buffer it. */
|
|
prevstate = state;
|
|
lasttwo = jch & 0x7f7f;
|
|
state = STATE_JISX0208;
|
|
COMBINE_STATE;
|
|
conv->ostate = state;
|
|
return count;
|
|
} else {
|
|
count += (state == STATE_JISX0208 ? 2 : 5);
|
|
if (n < count)
|
|
return RET_TOOSMALL;
|
|
if (state != STATE_JISX0208) {
|
|
r[0] = ESC;
|
|
r[1] = '$';
|
|
r[2] = 'B';
|
|
r += 3;
|
|
state = STATE_JISX0208;
|
|
}
|
|
r[0] = buf[0];
|
|
r[1] = buf[1];
|
|
COMBINE_STATE_NO_LASTTWO;
|
|
conv->ostate = state;
|
|
return count;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Try JISX 0213 plane 1 and JISX 0213 plane 2. */
|
|
if (jch != 0) {
|
|
if (jch & 0x8000) {
|
|
/* JISX 0213 plane 2. */
|
|
if (state != STATE_JISX02132) {
|
|
count += 4;
|
|
if (n < count)
|
|
return RET_TOOSMALL;
|
|
r[0] = ESC;
|
|
r[1] = '$';
|
|
r[2] = '(';
|
|
r[3] = 'P';
|
|
r += 4;
|
|
state = STATE_JISX02132;
|
|
}
|
|
} else {
|
|
/* JISX 0213 plane 1. */
|
|
if (state != STATE_JISX02131) {
|
|
count += 4;
|
|
if (n < count)
|
|
return RET_TOOSMALL;
|
|
r[0] = ESC;
|
|
r[1] = '$';
|
|
r[2] = '(';
|
|
r[3] = 'Q';
|
|
r += 4;
|
|
state = STATE_JISX02131;
|
|
}
|
|
}
|
|
if (jch & 0x0080) {
|
|
/* A possible match in comp_table_data. We have to buffer it. */
|
|
/* We know it's a JISX 0213 plane 1 character. */
|
|
if (jch & 0x8000) abort();
|
|
prevstate = state;
|
|
lasttwo = jch & 0x7f7f;
|
|
COMBINE_STATE;
|
|
conv->ostate = state;
|
|
return count;
|
|
}
|
|
count += 2;
|
|
if (n < count)
|
|
return RET_TOOSMALL;
|
|
r[0] = (jch >> 8) & 0x7f;
|
|
r[1] = jch & 0x7f;
|
|
COMBINE_STATE_NO_LASTTWO;
|
|
conv->ostate = state;
|
|
return count;
|
|
}
|
|
|
|
/* Try JIS X 0201-1976 Katakana. This is not officially part of
|
|
ISO-2022-JP-3. Therefore we try it after all other attempts. */
|
|
ret = jisx0201_wctomb(conv,buf,wc,1);
|
|
if (ret != RET_ILUNI) {
|
|
if (ret != 1) abort();
|
|
if (buf[0] >= 0x80) {
|
|
count += (state == STATE_JISX0201KATAKANA ? 1 : 4);
|
|
if (n < count)
|
|
return RET_TOOSMALL;
|
|
if (state != STATE_JISX0201KATAKANA) {
|
|
r[0] = ESC;
|
|
r[1] = '(';
|
|
r[2] = 'I';
|
|
r += 3;
|
|
state = STATE_JISX0201KATAKANA;
|
|
}
|
|
r[0] = buf[0]-0x80;
|
|
COMBINE_STATE_NO_LASTTWO;
|
|
conv->ostate = state;
|
|
return count;
|
|
}
|
|
}
|
|
|
|
return RET_ILUNI;
|
|
}
|
|
|
|
static int
|
|
iso2022_jp3_reset (conv_t conv, unsigned char *r, int n)
|
|
{
|
|
state_t state = conv->ostate;
|
|
SPLIT_STATE;
|
|
{
|
|
int count =
|
|
(lasttwo ? (prevstate != state ? 3 : 0) + 2 : 0)
|
|
+ (state != STATE_ASCII ? 3 : 0);
|
|
if (n < count)
|
|
return RET_TOOSMALL;
|
|
if (lasttwo) {
|
|
if (prevstate != state) {
|
|
if (state != STATE_JISX0208) abort();
|
|
r[0] = ESC;
|
|
r[1] = '$';
|
|
r[2] = 'B';
|
|
r += 3;
|
|
}
|
|
r[0] = (lasttwo >> 8) & 0xff;
|
|
r[1] = lasttwo & 0xff;
|
|
r += 2;
|
|
}
|
|
if (state != STATE_ASCII) {
|
|
r[0] = ESC;
|
|
r[1] = '(';
|
|
r[2] = 'B';
|
|
}
|
|
/* conv->ostate = 0; will be done by the caller */
|
|
return count;
|
|
}
|
|
}
|
|
|
|
#undef COMBINE_STATE_NO_LASTTWO
|
|
#undef COMBINE_STATE
|
|
#undef SPLIT_STATE
|
|
#undef STATE_JISX02132
|
|
#undef STATE_JISX02131
|
|
#undef STATE_JISX0208
|
|
#undef STATE_JISX0201KATAKANA
|
|
#undef STATE_JISX0201ROMAN
|
|
#undef STATE_ASCII
|