| /* |
| * Copyright (C) 1999-2002 Free Software Foundation, Inc. |
| * This file is part of the GNU LIBICONV Library. |
| * |
| * The GNU LIBICONV Library is free software; you can redistribute it |
| * and/or modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either version 2.1 |
| * 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with the GNU LIBICONV Library; see the file COPYING.LIB. |
| * If not, see <https://www.gnu.org/licenses/>. |
| */ |
| |
| /* |
| * SHIFT_JISX0213 |
| */ |
| |
| /* The structure of Shift_JISX0213 is as follows: |
| |
| 0x00..0x7F: ISO646-JP, an ASCII variant |
| |
| 0x{A1..DF}: JISX0201 Katakana. |
| |
| 0x{81..9F,E0..EF}{40..7E,80..FC}: JISX0213 plane 1. |
| |
| 0x{F0..FC}{40..7E,80..FC}: JISX0213 plane 2, with irregular row mapping. |
| |
| Note that some JISX0213 characters are not contained in Unicode 3.2 |
| and are therefore best represented as sequences of Unicode characters. |
| */ |
| |
| #include "jisx0213.h" |
| #include "flushwc.h" |
| |
| static int |
| shift_jisx0213_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n) |
| { |
| ucs4_t last_wc = conv->istate; |
| if (last_wc) { |
| /* Output the buffered character. */ |
| conv->istate = 0; |
| *pwc = last_wc; |
| return 0; /* Don't advance the input pointer. */ |
| } else { |
| unsigned char c = *s; |
| if (c < 0x80) { |
| /* Plain ISO646-JP character. */ |
| if (c == 0x5c) |
| *pwc = (ucs4_t) 0x00a5; |
| else if (c == 0x7e) |
| *pwc = (ucs4_t) 0x203e; |
| else |
| *pwc = (ucs4_t) c; |
| return 1; |
| } else if (c >= 0xa1 && c <= 0xdf) { |
| *pwc = c + 0xfec0; |
| return 1; |
| } else { |
| if ((c >= 0x81 && c <= 0x9f) || (c >= 0xe0 && c <= 0xfc)) { |
| /* Two byte character. */ |
| if (n >= 2) { |
| unsigned char c2 = s[1]; |
| if ((c2 >= 0x40 && c2 <= 0x7e) || (c2 >= 0x80 && c2 <= 0xfc)) { |
| unsigned int c1; |
| ucs4_t wc; |
| /* Convert to row and column. */ |
| if (c < 0xe0) |
| c -= 0x81; |
| else |
| c -= 0xc1; |
| if (c2 < 0x80) |
| c2 -= 0x40; |
| else |
| c2 -= 0x41; |
| /* Now 0 <= c <= 0x3b, 0 <= c2 <= 0xbb. */ |
| c1 = 2 * c; |
| if (c2 >= 0x5e) |
| c2 -= 0x5e, c1++; |
| c2 += 0x21; |
| if (c1 >= 0x5e) { |
| /* Handling of JISX 0213 plane 2 rows. */ |
| if (c1 >= 0x67) |
| c1 += 230; |
| else if (c1 >= 0x63 || c1 == 0x5f) |
| c1 += 168; |
| else |
| c1 += 162; |
| } |
| wc = jisx0213_to_ucs4(0x121+c1,c2); |
| 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; |
| } else |
| *pwc = wc; |
| return 2; |
| } |
| } |
| } else |
| return RET_TOOFEW(0); |
| } |
| return RET_ILSEQ; |
| } |
| } |
| } |
| |
| #define shift_jisx0213_flushwc normal_flushwc |
| |
| /* Composition tables for each of the relevant combining characters. */ |
| static const struct { unsigned short base; unsigned short composed; } shift_jisx0213_comp_table_data[] = { |
| #define shift_jisx0213_comp_table02e5_idx 0 |
| #define shift_jisx0213_comp_table02e5_len 1 |
| { 0x8684, 0x8685 }, /* 0x12B65 = 0x12B64 U+02E5 */ |
| #define shift_jisx0213_comp_table02e9_idx (shift_jisx0213_comp_table02e5_idx+shift_jisx0213_comp_table02e5_len) |
| #define shift_jisx0213_comp_table02e9_len 1 |
| { 0x8680, 0x8686 }, /* 0x12B66 = 0x12B60 U+02E9 */ |
| #define shift_jisx0213_comp_table0300_idx (shift_jisx0213_comp_table02e9_idx+shift_jisx0213_comp_table02e9_len) |
| #define shift_jisx0213_comp_table0300_len 5 |
| { 0x857b, 0x8663 }, /* 0x12B44 = 0x1295C U+0300 */ |
| { 0x8657, 0x8667 }, /* 0x12B48 = 0x12B38 U+0300 */ |
| { 0x8656, 0x8669 }, /* 0x12B4A = 0x12B37 U+0300 */ |
| { 0x864f, 0x866b }, /* 0x12B4C = 0x12B30 U+0300 */ |
| { 0x8662, 0x866d }, /* 0x12B4E = 0x12B43 U+0300 */ |
| #define shift_jisx0213_comp_table0301_idx (shift_jisx0213_comp_table0300_idx+shift_jisx0213_comp_table0300_len) |
| #define shift_jisx0213_comp_table0301_len 4 |
| { 0x8657, 0x8668 }, /* 0x12B49 = 0x12B38 U+0301 */ |
| { 0x8656, 0x866a }, /* 0x12B4B = 0x12B37 U+0301 */ |
| { 0x864f, 0x866c }, /* 0x12B4D = 0x12B30 U+0301 */ |
| { 0x8662, 0x866e }, /* 0x12B4F = 0x12B43 U+0301 */ |
| #define shift_jisx0213_comp_table309a_idx (shift_jisx0213_comp_table0301_idx+shift_jisx0213_comp_table0301_len) |
| #define shift_jisx0213_comp_table309a_len 14 |
| { 0x82a9, 0x82f5 }, /* 0x12477 = 0x1242B U+309A */ |
| { 0x82ab, 0x82f6 }, /* 0x12478 = 0x1242D U+309A */ |
| { 0x82ad, 0x82f7 }, /* 0x12479 = 0x1242F U+309A */ |
| { 0x82af, 0x82f8 }, /* 0x1247A = 0x12431 U+309A */ |
| { 0x82b1, 0x82f9 }, /* 0x1247B = 0x12433 U+309A */ |
| { 0x834a, 0x8397 }, /* 0x12577 = 0x1252B U+309A */ |
| { 0x834c, 0x8398 }, /* 0x12578 = 0x1252D U+309A */ |
| { 0x834e, 0x8399 }, /* 0x12579 = 0x1252F U+309A */ |
| { 0x8350, 0x839a }, /* 0x1257A = 0x12531 U+309A */ |
| { 0x8352, 0x839b }, /* 0x1257B = 0x12533 U+309A */ |
| { 0x835a, 0x839c }, /* 0x1257C = 0x1253B U+309A */ |
| { 0x8363, 0x839d }, /* 0x1257D = 0x12544 U+309A */ |
| { 0x8367, 0x839e }, /* 0x1257E = 0x12548 U+309A */ |
| { 0x83f3, 0x83f6 }, /* 0x12678 = 0x12675 U+309A */ |
| }; |
| |
| static int |
| shift_jisx0213_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n) |
| { |
| int count = 0; |
| unsigned short lasttwo = conv->ostate; |
| |
| if (lasttwo) { |
| /* Attempt to combine the last character with this one. */ |
| unsigned int idx; |
| unsigned int len; |
| |
| if (wc == 0x02e5) |
| idx = shift_jisx0213_comp_table02e5_idx, |
| len = shift_jisx0213_comp_table02e5_len; |
| else if (wc == 0x02e9) |
| idx = shift_jisx0213_comp_table02e9_idx, |
| len = shift_jisx0213_comp_table02e9_len; |
| else if (wc == 0x0300) |
| idx = shift_jisx0213_comp_table0300_idx, |
| len = shift_jisx0213_comp_table0300_len; |
| else if (wc == 0x0301) |
| idx = shift_jisx0213_comp_table0301_idx, |
| len = shift_jisx0213_comp_table0301_len; |
| else if (wc == 0x309a) |
| idx = shift_jisx0213_comp_table309a_idx, |
| len = shift_jisx0213_comp_table309a_len; |
| else |
| goto not_combining; |
| |
| do |
| if (shift_jisx0213_comp_table_data[idx].base == lasttwo) |
| break; |
| while (++idx, --len > 0); |
| |
| if (len > 0) { |
| /* Output the combined character. */ |
| if (n >= 2) { |
| lasttwo = shift_jisx0213_comp_table_data[idx].composed; |
| r[0] = (lasttwo >> 8) & 0xff; |
| r[1] = lasttwo & 0xff; |
| conv->ostate = 0; |
| return 2; |
| } else |
| return RET_TOOSMALL; |
| } |
| |
| not_combining: |
| /* Output the buffered character. */ |
| if (n < 2) |
| return RET_TOOSMALL; |
| r[0] = (lasttwo >> 8) & 0xff; |
| r[1] = lasttwo & 0xff; |
| r += 2; |
| count = 2; |
| } |
| |
| if (wc < 0x80 && wc != 0x5c && wc != 0x7e) { |
| /* Plain ISO646-JP character. */ |
| if (n > count) { |
| r[0] = (unsigned char) wc; |
| conv->ostate = 0; |
| return count+1; |
| } else |
| return RET_TOOSMALL; |
| } else if (wc == 0x00a5) { |
| if (n > count) { |
| r[0] = 0x5c; |
| conv->ostate = 0; |
| return count+1; |
| } else |
| return RET_TOOSMALL; |
| } else if (wc == 0x203e) { |
| if (n > count) { |
| r[0] = 0x7e; |
| conv->ostate = 0; |
| return count+1; |
| } else |
| return RET_TOOSMALL; |
| } else if (wc >= 0xff61 && wc <= 0xff9f) { |
| /* Half-width katakana. */ |
| if (n > count) { |
| r[0] = wc - 0xfec0; |
| conv->ostate = 0; |
| return count+1; |
| } else |
| return RET_TOOSMALL; |
| } else { |
| unsigned int s1, s2; |
| unsigned short jch = ucs4_to_jisx0213(wc); |
| if (jch != 0) { |
| /* Convert it to shifted representation. */ |
| s1 = jch >> 8; |
| s2 = jch & 0x7f; |
| s1 -= 0x21; |
| s2 -= 0x21; |
| if (s1 >= 0x5e) { |
| /* Handling of JISX 0213 plane 2 rows. */ |
| if (s1 >= 0xcd) /* rows 0x26E..0x27E */ |
| s1 -= 102; |
| else if (s1 >= 0x8b || s1 == 0x87) /* rows 0x228, 0x22C..0x22F */ |
| s1 -= 40; |
| else /* rows 0x221, 0x223..0x225 */ |
| s1 -= 34; |
| /* Now 0x5e <= s1 <= 0x77. */ |
| } |
| if (s1 & 1) |
| s2 += 0x5e; |
| s1 = s1 >> 1; |
| if (s1 < 0x1f) |
| s1 += 0x81; |
| else |
| s1 += 0xc1; |
| if (s2 < 0x3f) |
| s2 += 0x40; |
| else |
| s2 += 0x41; |
| 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(); |
| conv->ostate = (s1 << 8) | s2; |
| return count+0; |
| } |
| /* Output the shifted representation. */ |
| if (n >= count+2) { |
| r[0] = s1; |
| r[1] = s2; |
| conv->ostate = 0; |
| return count+2; |
| } else |
| return RET_TOOSMALL; |
| } |
| return RET_ILUNI; |
| } |
| } |
| |
| static int |
| shift_jisx0213_reset (conv_t conv, unsigned char *r, size_t n) |
| { |
| state_t lasttwo = conv->ostate; |
| |
| if (lasttwo) { |
| if (n < 2) |
| return RET_TOOSMALL; |
| r[0] = (lasttwo >> 8) & 0xff; |
| r[1] = lasttwo & 0xff; |
| /* conv->ostate = 0; will be done by the caller */ |
| return 2; |
| } else |
| return 0; |
| } |
