forked from mia/Aegisub
693 lines
18 KiB
C
693 lines
18 KiB
C
/*
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* Copyright (C) 1999-2001, 2008 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, write to the Free Software Foundation, Inc., 51 Franklin Street,
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* Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/*
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* ISO-2022-JP-2
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*/
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/* Specification: RFC 1554 */
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/* ESC '(' 'I' for JISX0201 Katakana is an extension not found in RFC 1554 or
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CJK.INF, but implemented in glibc-2.1 and qt-2.0. */
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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
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#define STATE_JISX0201ROMAN 1
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#define STATE_JISX0201KATAKANA 2
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#define STATE_JISX0208 3
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#define STATE_JISX0212 4
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#define STATE_GB2312 5
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#define STATE_KSC5601 6
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/*
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* and one of the following values, << 8
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*/
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#define STATE_G2_NONE 0
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#define STATE_G2_ISO8859_1 1
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#define STATE_G2_ISO8859_7 2
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#define SPLIT_STATE \
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unsigned int state1 = state & 0xff, state2 = state >> 8
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#define COMBINE_STATE \
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state = (state2 << 8) | state1
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static int
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iso2022_jp2_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
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{
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state_t state = conv->istate;
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SPLIT_STATE;
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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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state1 = 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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state1 = 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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state1 = 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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state1 = 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] == 'A') {
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state1 = STATE_GB2312;
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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] == 'D') {
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state1 = STATE_JISX0212;
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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] == 'C') {
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state1 = STATE_KSC5601;
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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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goto ilseq;
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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 (n < count+3)
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goto none;
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if (s[2] == 'A') {
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state2 = STATE_G2_ISO8859_1;
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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] == 'F') {
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state2 = STATE_G2_ISO8859_7;
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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] == 'N') {
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switch (state2) {
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case STATE_G2_NONE:
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goto ilseq;
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case STATE_G2_ISO8859_1:
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if (s[2] < 0x80) {
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unsigned char buf = s[2]+0x80;
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int ret = iso8859_1_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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COMBINE_STATE;
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conv->istate = state;
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return count+3;
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} else
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goto ilseq;
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case STATE_G2_ISO8859_7:
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if (s[2] < 0x80) {
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unsigned char buf = s[2]+0x80;
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int ret = iso8859_7_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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COMBINE_STATE;
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conv->istate = state;
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return count+3;
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} else
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goto ilseq;
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default: abort();
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}
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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 (state1) {
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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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if (*pwc == 0x000a || *pwc == 0x000d)
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state2 = STATE_G2_NONE;
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COMBINE_STATE;
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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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if (*pwc == 0x000a || *pwc == 0x000d)
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state2 = STATE_G2_NONE;
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COMBINE_STATE;
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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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COMBINE_STATE;
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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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COMBINE_STATE;
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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_JISX0212:
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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 = jisx0212_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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COMBINE_STATE;
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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_GB2312:
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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 = gb2312_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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COMBINE_STATE;
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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_KSC5601:
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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 = ksc5601_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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COMBINE_STATE;
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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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default: abort();
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}
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none:
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COMBINE_STATE;
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conv->istate = state;
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return RET_TOOFEW(count);
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ilseq:
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COMBINE_STATE;
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conv->istate = state;
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return RET_SHIFT_ILSEQ(count);
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}
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#undef COMBINE_STATE
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#undef SPLIT_STATE
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/*
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* The state can also contain one of the following values, << 16.
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* Values >= STATE_TAG_LANGUAGE are temporary tag parsing states.
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*/
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#define STATE_TAG_NONE 0
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#define STATE_TAG_LANGUAGE 4
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#define STATE_TAG_LANGUAGE_j 5
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#define STATE_TAG_LANGUAGE_ja 1
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#define STATE_TAG_LANGUAGE_k 6
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#define STATE_TAG_LANGUAGE_ko 2
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#define STATE_TAG_LANGUAGE_z 7
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#define STATE_TAG_LANGUAGE_zh 3
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#define SPLIT_STATE \
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unsigned int state1 = state & 0xff, state2 = (state >> 8) & 0xff, state3 = state >> 16
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#define COMBINE_STATE \
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state = (state3 << 16) | (state2 << 8) | state1
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static int
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iso2022_jp2_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
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{
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state_t state = conv->ostate;
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SPLIT_STATE;
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unsigned char buf[2];
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int ret;
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/* This defines the conversion preferences depending on the current
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langauge tag. */
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enum conversion { none = 0, european, japanese, chinese, korean, other };
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static const unsigned int conversion_lists[STATE_TAG_LANGUAGE] = {
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/* STATE_TAG_NONE */
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japanese + (european << 3) + (chinese << 6) + (korean << 9) + (other << 12),
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/* STATE_TAG_LANGUAGE_ja */
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japanese + (european << 3) + (chinese << 6) + (korean << 9) + (other << 12),
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/* STATE_TAG_LANGUAGE_ko */
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korean + (european << 3) + (japanese << 6) + (chinese << 9) + (other << 12),
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/* STATE_TAG_LANGUAGE_zh */
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chinese + (european << 3) + (japanese << 6) + (korean << 9) + (other << 12)
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};
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unsigned int conversion_list;
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/* Handle Unicode tag characters (range U+E0000..U+E007F). */
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if ((wc >> 7) == (0xe0000 >> 7)) {
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char c = wc & 0x7f;
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if (c >= 'A' && c <= 'Z')
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c += 'a'-'A';
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switch (c) {
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case 0x01:
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state3 = STATE_TAG_LANGUAGE;
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COMBINE_STATE;
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conv->ostate = state;
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return 0;
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case 'j':
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if (state3 == STATE_TAG_LANGUAGE) {
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state3 = STATE_TAG_LANGUAGE_j;
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COMBINE_STATE;
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conv->ostate = state;
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return 0;
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}
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break;
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case 'a':
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if (state3 == STATE_TAG_LANGUAGE_j) {
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state3 = STATE_TAG_LANGUAGE_ja;
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COMBINE_STATE;
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conv->ostate = state;
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return 0;
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}
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break;
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case 'k':
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if (state3 == STATE_TAG_LANGUAGE) {
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state3 = STATE_TAG_LANGUAGE_k;
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COMBINE_STATE;
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conv->ostate = state;
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return 0;
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}
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break;
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case 'o':
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if (state3 == STATE_TAG_LANGUAGE_k) {
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state3 = STATE_TAG_LANGUAGE_ko;
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COMBINE_STATE;
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conv->ostate = state;
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return 0;
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}
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break;
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case 'z':
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if (state3 == STATE_TAG_LANGUAGE) {
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state3 = STATE_TAG_LANGUAGE_z;
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COMBINE_STATE;
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conv->ostate = state;
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return 0;
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}
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break;
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case 'h':
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if (state3 == STATE_TAG_LANGUAGE_z) {
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state3 = STATE_TAG_LANGUAGE_zh;
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COMBINE_STATE;
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conv->ostate = state;
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return 0;
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}
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break;
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case 0x7f:
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state3 = STATE_TAG_NONE;
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COMBINE_STATE;
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conv->ostate = state;
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return 0;
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default:
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break;
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}
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/* Other tag characters reset the tag parsing state or are ignored. */
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if (state3 >= STATE_TAG_LANGUAGE)
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state3 = STATE_TAG_NONE;
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COMBINE_STATE;
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conv->ostate = state;
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return 0;
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}
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if (state3 >= STATE_TAG_LANGUAGE)
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state3 = STATE_TAG_NONE;
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/* Try ASCII. */
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ret = ascii_wctomb(conv,buf,wc,1);
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if (ret != RET_ILUNI) {
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if (ret != 1) abort();
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if (buf[0] < 0x80) {
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int count = (state1 == STATE_ASCII ? 1 : 4);
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if (n < count)
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return RET_TOOSMALL;
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if (state1 != STATE_ASCII) {
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r[0] = ESC;
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r[1] = '(';
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r[2] = 'B';
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r += 3;
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state1 = STATE_ASCII;
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}
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r[0] = buf[0];
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if (wc == 0x000a || wc == 0x000d)
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state2 = STATE_G2_NONE;
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COMBINE_STATE;
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conv->ostate = state;
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return count;
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}
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}
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conversion_list = conversion_lists[state3];
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do {
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switch (conversion_list & ((1 << 3) - 1)) {
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case european:
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/* Try ISO-8859-1. */
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ret = iso8859_1_wctomb(conv,buf,wc,1);
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if (ret != RET_ILUNI) {
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if (ret != 1) abort();
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if (buf[0] >= 0x80) {
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int count = (state2 == STATE_G2_ISO8859_1 ? 3 : 6);
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if (n < count)
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return RET_TOOSMALL;
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if (state2 != STATE_G2_ISO8859_1) {
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r[0] = ESC;
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r[1] = '.';
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r[2] = 'A';
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r += 3;
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state2 = STATE_G2_ISO8859_1;
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}
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r[0] = ESC;
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r[1] = 'N';
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r[2] = buf[0]-0x80;
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COMBINE_STATE;
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conv->ostate = state;
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return count;
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}
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}
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/* Try ISO-8859-7. */
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ret = iso8859_7_wctomb(conv,buf,wc,1);
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if (ret != RET_ILUNI) {
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if (ret != 1) abort();
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if (buf[0] >= 0x80) {
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int count = (state2 == STATE_G2_ISO8859_7 ? 3 : 6);
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if (n < count)
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return RET_TOOSMALL;
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if (state2 != STATE_G2_ISO8859_7) {
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r[0] = ESC;
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r[1] = '.';
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r[2] = 'F';
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r += 3;
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state2 = STATE_G2_ISO8859_7;
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}
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r[0] = ESC;
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r[1] = 'N';
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r[2] = buf[0]-0x80;
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COMBINE_STATE;
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conv->ostate = state;
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return count;
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}
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}
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break;
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case japanese:
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/* Try JIS X 0201-1976 Roman. */
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ret = jisx0201_wctomb(conv,buf,wc,1);
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if (ret != RET_ILUNI) {
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if (ret != 1) abort();
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if (buf[0] < 0x80) {
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int count = (state1 == STATE_JISX0201ROMAN ? 1 : 4);
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if (n < count)
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return RET_TOOSMALL;
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if (state1 != STATE_JISX0201ROMAN) {
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r[0] = ESC;
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r[1] = '(';
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r[2] = 'J';
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r += 3;
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state1 = STATE_JISX0201ROMAN;
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}
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r[0] = buf[0];
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if (wc == 0x000a || wc == 0x000d)
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state2 = STATE_G2_NONE;
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COMBINE_STATE;
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conv->ostate = state;
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return count;
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}
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}
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/* Try JIS X 0208-1990 in place of JIS X 0208-1978 and
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JIS X 0208-1983. */
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ret = jisx0208_wctomb(conv,buf,wc,2);
|
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if (ret != RET_ILUNI) {
|
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if (ret != 2) abort();
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if (buf[0] < 0x80 && buf[1] < 0x80) {
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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
|