| /* |
| * Copyright (C) 1999-2004, 2008, 2016 Free Software Foundation, Inc. |
| * This file is part of the GNU LIBICONV Library. |
| * |
| * The GNU LIBICONV Library is free software; you can redistribute it |
| * and/or modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * The GNU LIBICONV Library is distributed in the hope that it will be |
| * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with the GNU LIBICONV Library; see the file COPYING.LIB. |
| * If not, see <https://www.gnu.org/licenses/>. |
| */ |
| |
| /* |
| * ISO-2022-JP-3 |
| */ |
| |
| #include "jisx0213.h" |
| |
| #define ESC 0x1b |
| |
| /* |
| * The state is composed of one of the following values |
| */ |
| #define STATE_ASCII 0 /* Esc ( B */ |
| #define STATE_JISX0201ROMAN 1 /* Esc ( J */ |
| #define STATE_JISX0201KATAKANA 2 /* Esc ( I */ |
| #define STATE_JISX0208 3 /* Esc $ @ or Esc $ B */ |
| #define STATE_JISX02131 4 /* Esc $ ( O or Esc $ ( Q*/ |
| #define STATE_JISX02132 5 /* Esc $ ( P */ |
| |
| /* |
| * In the ISO-2022-JP-3 to UCS-4 direction, the state also holds the last |
| * character to be output, shifted by 3 bits. |
| */ |
| |
| static int |
| iso2022_jp3_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n) |
| { |
| ucs4_t last_wc = conv->istate >> 3; |
| if (last_wc) { |
| /* Output the buffered character. */ |
| conv->istate &= 7; |
| *pwc = last_wc; |
| return 0; /* Don't advance the input pointer. */ |
| } else { |
| state_t state = conv->istate; |
| int count = 0; |
| unsigned char c; |
| for (;;) { |
| c = *s; |
| if (c == ESC) { |
| if (n < count+3) |
| goto none; |
| if (s[1] == '(') { |
| if (s[2] == 'B') { |
| state = STATE_ASCII; |
| s += 3; count += 3; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| if (s[2] == 'J') { |
| state = STATE_JISX0201ROMAN; |
| s += 3; count += 3; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| if (s[2] == 'I') { |
| state = STATE_JISX0201KATAKANA; |
| s += 3; count += 3; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| goto ilseq; |
| } |
| if (s[1] == '$') { |
| if (s[2] == '@' || s[2] == 'B') { |
| /* We don't distinguish JIS X 0208-1978 and JIS X 0208-1983. */ |
| state = STATE_JISX0208; |
| s += 3; count += 3; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| if (s[2] == '(') { |
| if (n < count+4) |
| goto none; |
| if (s[3] == 'O' || s[3] == 'Q') { |
| state = STATE_JISX02131; |
| s += 4; count += 4; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| if (s[3] == 'P') { |
| state = STATE_JISX02132; |
| s += 4; count += 4; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| } |
| goto ilseq; |
| } |
| goto ilseq; |
| } |
| break; |
| } |
| switch (state) { |
| case STATE_ASCII: |
| if (c < 0x80) { |
| int ret = ascii_mbtowc(conv,pwc,s,1); |
| if (ret == RET_ILSEQ) |
| goto ilseq; |
| if (ret != 1) abort(); |
| conv->istate = state; |
| return count+1; |
| } else |
| goto ilseq; |
| case STATE_JISX0201ROMAN: |
| if (c < 0x80) { |
| int ret = jisx0201_mbtowc(conv,pwc,s,1); |
| if (ret == RET_ILSEQ) |
| goto ilseq; |
| if (ret != 1) abort(); |
| conv->istate = state; |
| return count+1; |
| } else |
| goto ilseq; |
| case STATE_JISX0201KATAKANA: |
| if (c < 0x80) { |
| unsigned char buf = c+0x80; |
| int ret = jisx0201_mbtowc(conv,pwc,&buf,1); |
| if (ret == RET_ILSEQ) |
| goto ilseq; |
| if (ret != 1) abort(); |
| conv->istate = state; |
| return count+1; |
| } else |
| goto ilseq; |
| case STATE_JISX0208: |
| if (n < count+2) |
| goto none; |
| if (s[0] < 0x80 && s[1] < 0x80) { |
| int ret = jisx0208_mbtowc(conv,pwc,s,2); |
| if (ret == RET_ILSEQ) |
| goto ilseq; |
| if (ret != 2) abort(); |
| conv->istate = state; |
| return count+2; |
| } else |
| goto ilseq; |
| case STATE_JISX02131: |
| case STATE_JISX02132: |
| if (n < count+2) |
| goto none; |
| if (s[0] < 0x80 && s[1] < 0x80) { |
| ucs4_t wc = jisx0213_to_ucs4(((state-STATE_JISX02131+1)<<8)+s[0],s[1]); |
| if (wc) { |
| if (wc < 0x80) { |
| /* It's a combining character. */ |
| ucs4_t wc1 = jisx0213_to_ucs_combining[wc - 1][0]; |
| ucs4_t wc2 = jisx0213_to_ucs_combining[wc - 1][1]; |
| /* We cannot output two Unicode characters at once. So, |
| output the first character and buffer the second one. */ |
| *pwc = wc1; |
| conv->istate = (wc2 << 3) | state; |
| } else { |
| *pwc = wc; |
| conv->istate = state; |
| } |
| return count+2; |
| } |
| } |
| goto ilseq; |
| default: abort(); |
| } |
| none: |
| conv->istate = state; |
| return RET_TOOFEW(count); |
| |
| ilseq: |
| conv->istate = state; |
| return RET_SHIFT_ILSEQ(count); |
| } |
| } |
| |
| static int |
| iso2022_jp3_flushwc (conv_t conv, ucs4_t *pwc) |
| { |
| ucs4_t last_wc = conv->istate >> 3; |
| if (last_wc) { |
| /* Output the buffered character. */ |
| conv->istate &= 7; |
| *pwc = last_wc; |
| return 1; |
| } else |
| return 0; |
| } |
| |
| /* |
| * In the UCS-4 to ISO-2022-JP-3 direction, the state also holds the last two |
| * bytes to be output, shifted by 3 bits, and the STATE_xxxxx value that was |
| * effective before this buffered character, shifted by 19 bits. |
| */ |
| |
| /* Composition tables for each of the relevant combining characters. */ |
| static const struct { unsigned short base; unsigned short composed; } iso2022_jp3_comp_table_data[] = { |
| #define iso2022_jp3_comp_table02e5_idx 0 |
| #define iso2022_jp3_comp_table02e5_len 1 |
| { 0x2b64, 0x2b65 }, /* 0x12B65 = 0x12B64 U+02E5 */ |
| #define iso2022_jp3_comp_table02e9_idx (iso2022_jp3_comp_table02e5_idx+iso2022_jp3_comp_table02e5_len) |
| #define iso2022_jp3_comp_table02e9_len 1 |
| { 0x2b60, 0x2b66 }, /* 0x12B66 = 0x12B60 U+02E9 */ |
| #define iso2022_jp3_comp_table0300_idx (iso2022_jp3_comp_table02e9_idx+iso2022_jp3_comp_table02e9_len) |
| #define iso2022_jp3_comp_table0300_len 5 |
| { 0x295c, 0x2b44 }, /* 0x12B44 = 0x1295C U+0300 */ |
| { 0x2b38, 0x2b48 }, /* 0x12B48 = 0x12B38 U+0300 */ |
| { 0x2b37, 0x2b4a }, /* 0x12B4A = 0x12B37 U+0300 */ |
| { 0x2b30, 0x2b4c }, /* 0x12B4C = 0x12B30 U+0300 */ |
| { 0x2b43, 0x2b4e }, /* 0x12B4E = 0x12B43 U+0300 */ |
| #define iso2022_jp3_comp_table0301_idx (iso2022_jp3_comp_table0300_idx+iso2022_jp3_comp_table0300_len) |
| #define iso2022_jp3_comp_table0301_len 4 |
| { 0x2b38, 0x2b49 }, /* 0x12B49 = 0x12B38 U+0301 */ |
| { 0x2b37, 0x2b4b }, /* 0x12B4B = 0x12B37 U+0301 */ |
| { 0x2b30, 0x2b4d }, /* 0x12B4D = 0x12B30 U+0301 */ |
| { 0x2b43, 0x2b4f }, /* 0x12B4F = 0x12B43 U+0301 */ |
| #define iso2022_jp3_comp_table309a_idx (iso2022_jp3_comp_table0301_idx+iso2022_jp3_comp_table0301_len) |
| #define iso2022_jp3_comp_table309a_len 14 |
| { 0x242b, 0x2477 }, /* 0x12477 = 0x1242B U+309A */ |
| { 0x242d, 0x2478 }, /* 0x12478 = 0x1242D U+309A */ |
| { 0x242f, 0x2479 }, /* 0x12479 = 0x1242F U+309A */ |
| { 0x2431, 0x247a }, /* 0x1247A = 0x12431 U+309A */ |
| { 0x2433, 0x247b }, /* 0x1247B = 0x12433 U+309A */ |
| { 0x252b, 0x2577 }, /* 0x12577 = 0x1252B U+309A */ |
| { 0x252d, 0x2578 }, /* 0x12578 = 0x1252D U+309A */ |
| { 0x252f, 0x2579 }, /* 0x12579 = 0x1252F U+309A */ |
| { 0x2531, 0x257a }, /* 0x1257A = 0x12531 U+309A */ |
| { 0x2533, 0x257b }, /* 0x1257B = 0x12533 U+309A */ |
| { 0x253b, 0x257c }, /* 0x1257C = 0x1253B U+309A */ |
| { 0x2544, 0x257d }, /* 0x1257D = 0x12544 U+309A */ |
| { 0x2548, 0x257e }, /* 0x1257E = 0x12548 U+309A */ |
| { 0x2675, 0x2678 }, /* 0x12678 = 0x12675 U+309A */ |
| }; |
| |
| #define SPLIT_STATE \ |
| unsigned short lasttwo = state >> 3; state_t prevstate = state >> 19; state &= 7 |
| #define COMBINE_STATE \ |
| state |= (prevstate << 19) | (lasttwo << 3) |
| #define COMBINE_STATE_NO_LASTTWO \ |
| /* assume lasttwo == 0, then prevstate is ignored */ |
| |
| static int |
| iso2022_jp3_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n) |
| { |
| int count = 0; |
| unsigned char buf[2]; |
| unsigned short jch; |
| int ret; |
| state_t state = conv->ostate; |
| SPLIT_STATE; |
| |
| if (lasttwo) { |
| /* Attempt to combine the last character with this one. */ |
| unsigned int idx; |
| unsigned int len; |
| |
| if (wc == 0x02e5) |
| idx = iso2022_jp3_comp_table02e5_idx, |
| len = iso2022_jp3_comp_table02e5_len; |
| else if (wc == 0x02e9) |
| idx = iso2022_jp3_comp_table02e9_idx, |
| len = iso2022_jp3_comp_table02e9_len; |
| else if (wc == 0x0300) |
| idx = iso2022_jp3_comp_table0300_idx, |
| len = iso2022_jp3_comp_table0300_len; |
| else if (wc == 0x0301) |
| idx = iso2022_jp3_comp_table0301_idx, |
| len = iso2022_jp3_comp_table0301_len; |
| else if (wc == 0x309a) |
| idx = iso2022_jp3_comp_table309a_idx, |
| len = iso2022_jp3_comp_table309a_len; |
| else |
| goto not_combining; |
| |
| do |
| if (iso2022_jp3_comp_table_data[idx].base == lasttwo) |
| break; |
| while (++idx, --len > 0); |
| |
| if (len > 0) { |
| /* Output the combined character. */ |
| /* We know the combined character is in JISX0213 plane 1, but |
| the buffered character may have been in JISX0208 or in |
| JISX0213 plane 1. */ |
| count = (state != STATE_JISX02131 ? 4 : 0) + 2; |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state != STATE_JISX02131) { |
| r[0] = ESC; |
| r[1] = '$'; |
| r[2] = '('; |
| r[3] = 'Q'; |
| r += 4; |
| state = STATE_JISX02131; |
| } |
| lasttwo = iso2022_jp3_comp_table_data[idx].composed; |
| r[0] = (lasttwo >> 8) & 0xff; |
| r[1] = lasttwo & 0xff; |
| COMBINE_STATE_NO_LASTTWO; |
| conv->ostate = state; |
| return count; |
| } |
| |
| not_combining: |
| /* Output the buffered character. */ |
| /* We know it is in JISX0208 or in JISX0213 plane 1. */ |
| count = (prevstate != state ? 3 : 0) + 2; |
| if (n < count) |
| return RET_TOOSMALL; |
| if (prevstate != state) { |
| if (state != STATE_JISX0208) abort(); |
| r[0] = ESC; |
| r[1] = '$'; |
| r[2] = 'B'; |
| r += 3; |
| } |
| r[0] = (lasttwo >> 8) & 0xff; |
| r[1] = lasttwo & 0xff; |
| r += 2; |
| } |
| |
| /* Try ASCII. */ |
| ret = ascii_wctomb(conv,buf,wc,1); |
| if (ret != RET_ILUNI) { |
| if (ret != 1) abort(); |
| if (buf[0] < 0x80) { |
| count += (state == STATE_ASCII ? 1 : 4); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state != STATE_ASCII) { |
| r[0] = ESC; |
| r[1] = '('; |
| r[2] = 'B'; |
| r += 3; |
| state = STATE_ASCII; |
| } |
| r[0] = buf[0]; |
| COMBINE_STATE_NO_LASTTWO; |
| conv->ostate = state; |
| return count; |
| } |
| } |
| |
| /* Try JIS X 0201-1976 Roman. */ |
| ret = jisx0201_wctomb(conv,buf,wc,1); |
| if (ret != RET_ILUNI) { |
| if (ret != 1) abort(); |
| if (buf[0] < 0x80) { |
| count += (state == STATE_JISX0201ROMAN ? 1 : 4); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state != STATE_JISX0201ROMAN) { |
| r[0] = ESC; |
| r[1] = '('; |
| r[2] = 'J'; |
| r += 3; |
| state = STATE_JISX0201ROMAN; |
| } |
| r[0] = buf[0]; |
| COMBINE_STATE_NO_LASTTWO; |
| conv->ostate = state; |
| return count; |
| } |
| } |
| |
| jch = ucs4_to_jisx0213(wc); |
| |
| /* Try JIS X 0208-1990 in place of JIS X 0208-1978 and JIS X 0208-1983. */ |
| ret = jisx0208_wctomb(conv,buf,wc,2); |
| if (ret != RET_ILUNI) { |
| if (ret != 2) abort(); |
| if (buf[0] < 0x80 && buf[1] < 0x80) { |
| if (jch & 0x0080) { |
| /* A possible match in comp_table_data. Buffer it. */ |
| prevstate = state; |
| lasttwo = jch & 0x7f7f; |
| state = STATE_JISX0208; |
| COMBINE_STATE; |
| conv->ostate = state; |
| return count; |
| } else { |
| count += (state == STATE_JISX0208 ? 2 : 5); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state != STATE_JISX0208) { |
| r[0] = ESC; |
| r[1] = '$'; |
| r[2] = 'B'; |
| r += 3; |
| state = STATE_JISX0208; |
| } |
| r[0] = buf[0]; |
| r[1] = buf[1]; |
| COMBINE_STATE_NO_LASTTWO; |
| conv->ostate = state; |
| return count; |
| } |
| } |
| } |
| |
| /* Try JISX 0213 plane 1 and JISX 0213 plane 2. */ |
| if (jch != 0) { |
| if (jch & 0x8000) { |
| /* JISX 0213 plane 2. */ |
| if (state != STATE_JISX02132) { |
| count += 4; |
| if (n < count) |
| return RET_TOOSMALL; |
| r[0] = ESC; |
| r[1] = '$'; |
| r[2] = '('; |
| r[3] = 'P'; |
| r += 4; |
| state = STATE_JISX02132; |
| } |
| } else { |
| /* JISX 0213 plane 1. */ |
| if (state != STATE_JISX02131) { |
| count += 4; |
| if (n < count) |
| return RET_TOOSMALL; |
| r[0] = ESC; |
| r[1] = '$'; |
| r[2] = '('; |
| r[3] = 'Q'; |
| r += 4; |
| state = STATE_JISX02131; |
| } |
| } |
| if (jch & 0x0080) { |
| /* A possible match in comp_table_data. We have to buffer it. */ |
| /* We know it's a JISX 0213 plane 1 character. */ |
| if (jch & 0x8000) abort(); |
| prevstate = state; |
| lasttwo = jch & 0x7f7f; |
| COMBINE_STATE; |
| conv->ostate = state; |
| return count; |
| } |
| count += 2; |
| if (n < count) |
| return RET_TOOSMALL; |
| r[0] = (jch >> 8) & 0x7f; |
| r[1] = jch & 0x7f; |
| COMBINE_STATE_NO_LASTTWO; |
| conv->ostate = state; |
| return count; |
| } |
| |
| /* Try JIS X 0201-1976 Katakana. This is not officially part of |
| ISO-2022-JP-3. Therefore we try it after all other attempts. */ |
| ret = jisx0201_wctomb(conv,buf,wc,1); |
| if (ret != RET_ILUNI) { |
| if (ret != 1) abort(); |
| if (buf[0] >= 0x80) { |
| count += (state == STATE_JISX0201KATAKANA ? 1 : 4); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state != STATE_JISX0201KATAKANA) { |
| r[0] = ESC; |
| r[1] = '('; |
| r[2] = 'I'; |
| r += 3; |
| state = STATE_JISX0201KATAKANA; |
| } |
| r[0] = buf[0]-0x80; |
| COMBINE_STATE_NO_LASTTWO; |
| conv->ostate = state; |
| return count; |
| } |
| } |
| |
| return RET_ILUNI; |
| } |
| |
| static int |
| iso2022_jp3_reset (conv_t conv, unsigned char *r, 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 |
