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538 lines
15 KiB
538 lines
15 KiB
4 years ago
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/*
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* Copyright (C) 1999-2004, 2008, 2016 Free Software Foundation, Inc.
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* This file is part of the GNU LIBICONV Library.
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*
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* The GNU LIBICONV Library is free software; you can redistribute it
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* and/or modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* The GNU LIBICONV Library is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* ISO-2022-JP-3
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*/
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#include "jisx0213.h"
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#define ESC 0x1b
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/*
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* The state is composed of one of the following values
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*/
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#define STATE_ASCII 0 /* Esc ( B */
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#define STATE_JISX0201ROMAN 1 /* Esc ( J */
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#define STATE_JISX0201KATAKANA 2 /* Esc ( I */
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#define STATE_JISX0208 3 /* Esc $ @ or Esc $ B */
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#define STATE_JISX02131 4 /* Esc $ ( O or Esc $ ( Q*/
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#define STATE_JISX02132 5 /* Esc $ ( P */
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/*
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* In the ISO-2022-JP-3 to UCS-4 direction, the state also holds the last
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* character to be output, shifted by 3 bits.
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*/
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static int
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iso2022_jp3_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
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{
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ucs4_t last_wc = conv->istate >> 3;
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if (last_wc) {
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/* Output the buffered character. */
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conv->istate &= 7;
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*pwc = last_wc;
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return 0; /* Don't advance the input pointer. */
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} else {
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state_t state = conv->istate;
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int count = 0;
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unsigned char c;
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for (;;) {
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c = *s;
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if (c == ESC) {
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if (n < count+3)
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goto none;
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if (s[1] == '(') {
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if (s[2] == 'B') {
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state = STATE_ASCII;
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s += 3; count += 3;
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if (n < count+1)
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goto none;
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continue;
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}
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if (s[2] == 'J') {
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state = STATE_JISX0201ROMAN;
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s += 3; count += 3;
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if (n < count+1)
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goto none;
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continue;
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}
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if (s[2] == 'I') {
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state = STATE_JISX0201KATAKANA;
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s += 3; count += 3;
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if (n < count+1)
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goto none;
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continue;
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}
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goto ilseq;
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}
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if (s[1] == '$') {
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if (s[2] == '@' || s[2] == 'B') {
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/* We don't distinguish JIS X 0208-1978 and JIS X 0208-1983. */
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state = STATE_JISX0208;
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s += 3; count += 3;
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if (n < count+1)
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goto none;
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continue;
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}
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if (s[2] == '(') {
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if (n < count+4)
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goto none;
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if (s[3] == 'O' || s[3] == 'Q') {
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state = STATE_JISX02131;
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s += 4; count += 4;
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if (n < count+1)
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goto none;
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continue;
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}
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if (s[3] == 'P') {
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state = STATE_JISX02132;
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s += 4; count += 4;
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if (n < count+1)
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goto none;
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continue;
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}
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}
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goto ilseq;
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}
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goto ilseq;
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}
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break;
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}
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switch (state) {
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case STATE_ASCII:
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if (c < 0x80) {
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int ret = ascii_mbtowc(conv,pwc,s,1);
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if (ret == RET_ILSEQ)
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goto ilseq;
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if (ret != 1) abort();
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conv->istate = state;
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return count+1;
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} else
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goto ilseq;
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case STATE_JISX0201ROMAN:
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if (c < 0x80) {
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int ret = jisx0201_mbtowc(conv,pwc,s,1);
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if (ret == RET_ILSEQ)
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goto ilseq;
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if (ret != 1) abort();
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conv->istate = state;
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return count+1;
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} else
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goto ilseq;
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case STATE_JISX0201KATAKANA:
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if (c < 0x80) {
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unsigned char buf = c+0x80;
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int ret = jisx0201_mbtowc(conv,pwc,&buf,1);
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if (ret == RET_ILSEQ)
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goto ilseq;
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if (ret != 1) abort();
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conv->istate = state;
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return count+1;
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} else
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goto ilseq;
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case STATE_JISX0208:
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if (n < count+2)
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goto none;
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if (s[0] < 0x80 && s[1] < 0x80) {
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int ret = jisx0208_mbtowc(conv,pwc,s,2);
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if (ret == RET_ILSEQ)
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goto ilseq;
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if (ret != 2) abort();
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conv->istate = state;
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return count+2;
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} else
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goto ilseq;
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case STATE_JISX02131:
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case STATE_JISX02132:
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if (n < count+2)
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goto none;
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if (s[0] < 0x80 && s[1] < 0x80) {
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ucs4_t wc = jisx0213_to_ucs4(((state-STATE_JISX02131+1)<<8)+s[0],s[1]);
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if (wc) {
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if (wc < 0x80) {
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/* It's a combining character. */
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ucs4_t wc1 = jisx0213_to_ucs_combining[wc - 1][0];
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ucs4_t wc2 = jisx0213_to_ucs_combining[wc - 1][1];
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/* We cannot output two Unicode characters at once. So,
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output the first character and buffer the second one. */
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*pwc = wc1;
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conv->istate = (wc2 << 3) | state;
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} else {
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*pwc = wc;
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conv->istate = state;
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}
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return count+2;
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}
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}
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goto ilseq;
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default: abort();
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}
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none:
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conv->istate = state;
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return RET_TOOFEW(count);
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ilseq:
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conv->istate = state;
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return RET_SHIFT_ILSEQ(count);
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}
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}
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static int
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iso2022_jp3_flushwc (conv_t conv, ucs4_t *pwc)
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{
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ucs4_t last_wc = conv->istate >> 3;
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if (last_wc) {
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/* Output the buffered character. */
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conv->istate &= 7;
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*pwc = last_wc;
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return 1;
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} else
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return 0;
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}
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/*
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* In the UCS-4 to ISO-2022-JP-3 direction, the state also holds the last two
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* bytes to be output, shifted by 3 bits, and the STATE_xxxxx value that was
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* effective before this buffered character, shifted by 19 bits.
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*/
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/* Composition tables for each of the relevant combining characters. */
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static const struct { unsigned short base; unsigned short composed; } iso2022_jp3_comp_table_data[] = {
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#define iso2022_jp3_comp_table02e5_idx 0
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#define iso2022_jp3_comp_table02e5_len 1
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{ 0x2b64, 0x2b65 }, /* 0x12B65 = 0x12B64 U+02E5 */
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#define iso2022_jp3_comp_table02e9_idx (iso2022_jp3_comp_table02e5_idx+iso2022_jp3_comp_table02e5_len)
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#define iso2022_jp3_comp_table02e9_len 1
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{ 0x2b60, 0x2b66 }, /* 0x12B66 = 0x12B60 U+02E9 */
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#define iso2022_jp3_comp_table0300_idx (iso2022_jp3_comp_table02e9_idx+iso2022_jp3_comp_table02e9_len)
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#define iso2022_jp3_comp_table0300_len 5
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{ 0x295c, 0x2b44 }, /* 0x12B44 = 0x1295C U+0300 */
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{ 0x2b38, 0x2b48 }, /* 0x12B48 = 0x12B38 U+0300 */
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{ 0x2b37, 0x2b4a }, /* 0x12B4A = 0x12B37 U+0300 */
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{ 0x2b30, 0x2b4c }, /* 0x12B4C = 0x12B30 U+0300 */
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{ 0x2b43, 0x2b4e }, /* 0x12B4E = 0x12B43 U+0300 */
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#define iso2022_jp3_comp_table0301_idx (iso2022_jp3_comp_table0300_idx+iso2022_jp3_comp_table0300_len)
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#define iso2022_jp3_comp_table0301_len 4
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{ 0x2b38, 0x2b49 }, /* 0x12B49 = 0x12B38 U+0301 */
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{ 0x2b37, 0x2b4b }, /* 0x12B4B = 0x12B37 U+0301 */
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{ 0x2b30, 0x2b4d }, /* 0x12B4D = 0x12B30 U+0301 */
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{ 0x2b43, 0x2b4f }, /* 0x12B4F = 0x12B43 U+0301 */
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#define iso2022_jp3_comp_table309a_idx (iso2022_jp3_comp_table0301_idx+iso2022_jp3_comp_table0301_len)
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#define iso2022_jp3_comp_table309a_len 14
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{ 0x242b, 0x2477 }, /* 0x12477 = 0x1242B U+309A */
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{ 0x242d, 0x2478 }, /* 0x12478 = 0x1242D U+309A */
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{ 0x242f, 0x2479 }, /* 0x12479 = 0x1242F U+309A */
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{ 0x2431, 0x247a }, /* 0x1247A = 0x12431 U+309A */
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{ 0x2433, 0x247b }, /* 0x1247B = 0x12433 U+309A */
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{ 0x252b, 0x2577 }, /* 0x12577 = 0x1252B U+309A */
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{ 0x252d, 0x2578 }, /* 0x12578 = 0x1252D U+309A */
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{ 0x252f, 0x2579 }, /* 0x12579 = 0x1252F U+309A */
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{ 0x2531, 0x257a }, /* 0x1257A = 0x12531 U+309A */
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{ 0x2533, 0x257b }, /* 0x1257B = 0x12533 U+309A */
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{ 0x253b, 0x257c }, /* 0x1257C = 0x1253B U+309A */
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{ 0x2544, 0x257d }, /* 0x1257D = 0x12544 U+309A */
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{ 0x2548, 0x257e }, /* 0x1257E = 0x12548 U+309A */
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{ 0x2675, 0x2678 }, /* 0x12678 = 0x12675 U+309A */
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};
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#define SPLIT_STATE \
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unsigned short lasttwo = state >> 3; state_t prevstate = state >> 19; state &= 7
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#define COMBINE_STATE \
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state |= (prevstate << 19) | (lasttwo << 3)
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#define COMBINE_STATE_NO_LASTTWO \
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/* assume lasttwo == 0, then prevstate is ignored */
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static int
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iso2022_jp3_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
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{
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int count = 0;
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unsigned char buf[2];
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unsigned short jch;
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int ret;
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state_t state = conv->ostate;
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SPLIT_STATE;
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if (lasttwo) {
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/* Attempt to combine the last character with this one. */
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unsigned int idx;
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unsigned int len;
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if (wc == 0x02e5)
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idx = iso2022_jp3_comp_table02e5_idx,
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len = iso2022_jp3_comp_table02e5_len;
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else if (wc == 0x02e9)
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idx = iso2022_jp3_comp_table02e9_idx,
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len = iso2022_jp3_comp_table02e9_len;
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else if (wc == 0x0300)
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idx = iso2022_jp3_comp_table0300_idx,
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len = iso2022_jp3_comp_table0300_len;
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else if (wc == 0x0301)
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idx = iso2022_jp3_comp_table0301_idx,
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len = iso2022_jp3_comp_table0301_len;
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else if (wc == 0x309a)
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idx = iso2022_jp3_comp_table309a_idx,
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len = iso2022_jp3_comp_table309a_len;
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else
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goto not_combining;
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do
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if (iso2022_jp3_comp_table_data[idx].base == lasttwo)
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break;
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while (++idx, --len > 0);
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|
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if (len > 0) {
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/* Output the combined character. */
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/* We know the combined character is in JISX0213 plane 1, but
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the buffered character may have been in JISX0208 or in
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JISX0213 plane 1. */
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count = (state != STATE_JISX02131 ? 4 : 0) + 2;
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if (n < count)
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return RET_TOOSMALL;
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if (state != STATE_JISX02131) {
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r[0] = ESC;
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r[1] = '$';
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r[2] = '(';
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r[3] = 'Q';
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r += 4;
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state = STATE_JISX02131;
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}
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lasttwo = iso2022_jp3_comp_table_data[idx].composed;
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r[0] = (lasttwo >> 8) & 0xff;
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r[1] = lasttwo & 0xff;
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COMBINE_STATE_NO_LASTTWO;
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conv->ostate = state;
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return count;
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}
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not_combining:
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/* Output the buffered character. */
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/* We know it is in JISX0208 or in JISX0213 plane 1. */
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count = (prevstate != state ? 3 : 0) + 2;
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|
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if (n < count)
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return RET_TOOSMALL;
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||
|
|
if (prevstate != state) {
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if (state != STATE_JISX0208) abort();
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||
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r[0] = ESC;
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||
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r[1] = '$';
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|
|
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, size_t 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
|