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537 lines
15 KiB
537 lines
15 KiB
/* |
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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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/* |
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* ISO-2022-JP-3 |
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*/ |
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|
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#include "jisx0213.h" |
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|
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#define ESC 0x1b |
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|
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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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/* |
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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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|
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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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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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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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} |
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r[0] = (lasttwo >> 8) & 0xff; |
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r[1] = lasttwo & 0xff; |
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r += 2; |
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} |
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|
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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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count += (state == STATE_ASCII ? 1 : 4); |
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if (n < count) |
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return RET_TOOSMALL; |
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if (state != 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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state = STATE_ASCII; |
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} |
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r[0] = buf[0]; |
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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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} |
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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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count += (state == STATE_JISX0201ROMAN ? 1 : 4); |
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if (n < count) |
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return RET_TOOSMALL; |
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if (state != 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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state = STATE_JISX0201ROMAN; |
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} |
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r[0] = buf[0]; |
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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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} |
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jch = ucs4_to_jisx0213(wc); |
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|
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/* Try JIS X 0208-1990 in place of JIS X 0208-1978 and 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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if (jch & 0x0080) { |
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/* A possible match in comp_table_data. Buffer it. */ |
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prevstate = state; |
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lasttwo = jch & 0x7f7f; |
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state = STATE_JISX0208; |
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COMBINE_STATE; |
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conv->ostate = state; |
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return count; |
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} else { |
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count += (state == STATE_JISX0208 ? 2 : 5); |
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if (n < count) |
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return RET_TOOSMALL; |
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if (state != STATE_JISX0208) { |
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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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state = STATE_JISX0208; |
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} |
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r[0] = buf[0]; |
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r[1] = buf[1]; |
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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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} |
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} |
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|
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/* Try JISX 0213 plane 1 and JISX 0213 plane 2. */ |
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if (jch != 0) { |
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if (jch & 0x8000) { |
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/* JISX 0213 plane 2. */ |
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if (state != STATE_JISX02132) { |
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count += 4; |
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if (n < count) |
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return RET_TOOSMALL; |
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r[0] = ESC; |
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r[1] = '$'; |
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r[2] = '('; |
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r[3] = 'P'; |
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r += 4; |
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state = STATE_JISX02132; |
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} |
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} else { |
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/* JISX 0213 plane 1. */ |
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if (state != STATE_JISX02131) { |
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count += 4; |
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if (n < count) |
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return RET_TOOSMALL; |
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r[0] = ESC; |
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r[1] = '$'; |
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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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} |
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if (jch & 0x0080) { |
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/* A possible match in comp_table_data. We have to buffer it. */ |
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/* We know it's a JISX 0213 plane 1 character. */ |
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if (jch & 0x8000) abort(); |
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prevstate = state; |
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lasttwo = jch & 0x7f7f; |
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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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count += 2; |
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if (n < count) |
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return RET_TOOSMALL; |
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r[0] = (jch >> 8) & 0x7f; |
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r[1] = jch & 0x7f; |
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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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|
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/* Try JIS X 0201-1976 Katakana. This is not officially part of |
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ISO-2022-JP-3. Therefore we try it after all other attempts. */ |
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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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count += (state == STATE_JISX0201KATAKANA ? 1 : 4); |
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if (n < count) |
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return RET_TOOSMALL; |
|
if (state != STATE_JISX0201KATAKANA) { |
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r[0] = ESC; |
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r[1] = '('; |
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r[2] = 'I'; |
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r += 3; |
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state = STATE_JISX0201KATAKANA; |
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} |
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r[0] = buf[0]-0x80; |
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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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} |
|
|
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return RET_ILUNI; |
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} |
|
|
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static int |
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iso2022_jp3_reset (conv_t conv, unsigned char *r, size_t n) |
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{ |
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state_t state = conv->ostate; |
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SPLIT_STATE; |
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{ |
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int count = |
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(lasttwo ? (prevstate != state ? 3 : 0) + 2 : 0) |
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+ (state != STATE_ASCII ? 3 : 0); |
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if (n < count) |
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return RET_TOOSMALL; |
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if (lasttwo) { |
|
if (prevstate != state) { |
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if (state != STATE_JISX0208) abort(); |
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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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} |
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r[0] = (lasttwo >> 8) & 0xff; |
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r[1] = lasttwo & 0xff; |
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r += 2; |
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} |
|
if (state != STATE_ASCII) { |
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r[0] = ESC; |
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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
|
|
|