+++ /dev/null
-/*
- * Copyright (C) 1999-2002 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., 59 Temple Place -
- * Suite 330, Boston, MA 02111-1307, 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 */
-#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;
- }
- 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. */
- 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') {
- 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;
- }
- }
- return RET_ILSEQ;
- }
- return RET_ILSEQ;
- }
- break;
- }
- switch (state) {
- 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();
- 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();
- 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();
- 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();
- conv->istate = state;
- return count+2;
- } else
- return RET_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;
- }
- }
- return RET_ILSEQ;
- default: abort();
- }
- none:
- conv->istate = state;
- return RET_TOOFEW(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] = 'O';
- 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] = 'O';
- 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
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