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thodg/libiconv/lib/euc_jisx0213.h
Bruno Haible
- lib/euc_jisx0213.h
-
/* * 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 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, write to the Free Software Foundation, Inc., 51 Franklin Street, * Fifth Floor, Boston, MA 02110-1301, USA. */ /* * EUC-JISX0213 */ /* The structure of EUC-JISX0213 is as follows: 0x00..0x7F: ASCII 0x8E{A1..FE}: JISX0201 Katakana, with prefix 0x8E, offset by +0x80. 0x8F{A1..FE}{A1..FE}: JISX0213 plane 2, with prefix 0x8F, offset by +0x8080. 0x{A1..FE}{A1..FE}: JISX0213 plane 1, offset by +0x8080. 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 euc_jisx0213_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int 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 ASCII character. */ *pwc = (ucs4_t) c; return 1; } else { if ((c >= 0xa1 && c <= 0xfe) || c == 0x8e || c == 0x8f) { /* Two or three byte character. */ if (n >= 2) { unsigned char c2 = s[1]; if (c2 >= 0xa1 && c2 <= 0xfe) { if (c == 0x8e) { /* Half-width katakana. */ if (c2 <= 0xdf) { *pwc = c2 + 0xfec0; return 2; } } else { ucs4_t wc; if (c == 0x8f) { /* JISX 0213 plane 2. */ if (n >= 3) { unsigned char c3 = s[2]; wc = jisx0213_to_ucs4(0x200-0x80+c2,c3^0x80); } else return RET_TOOFEW(0); } else { /* JISX 0213 plane 1. */ wc = jisx0213_to_ucs4(0x100-0x80+c,c2^0x80); } 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 (c == 0x8f ? 3 : 2); } } } } else return RET_TOOFEW(0); } return RET_ILSEQ; } } } #define euc_jisx0213_flushwc normal_flushwc /* Composition tables for each of the relevant combining characters. */ static const struct { unsigned short base; unsigned short composed; } euc_jisx0213_comp_table_data[] = { #define euc_jisx0213_comp_table02e5_idx 0 #define euc_jisx0213_comp_table02e5_len 1 { 0xabe4, 0xabe5 }, /* 0x12B65 = 0x12B64 U+02E5 */ #define euc_jisx0213_comp_table02e9_idx (euc_jisx0213_comp_table02e5_idx+euc_jisx0213_comp_table02e5_len) #define euc_jisx0213_comp_table02e9_len 1 { 0xabe0, 0xabe6 }, /* 0x12B66 = 0x12B60 U+02E9 */ #define euc_jisx0213_comp_table0300_idx (euc_jisx0213_comp_table02e9_idx+euc_jisx0213_comp_table02e9_len) #define euc_jisx0213_comp_table0300_len 5 { 0xa9dc, 0xabc4 }, /* 0x12B44 = 0x1295C U+0300 */ { 0xabb8, 0xabc8 }, /* 0x12B48 = 0x12B38 U+0300 */ { 0xabb7, 0xabca }, /* 0x12B4A = 0x12B37 U+0300 */ { 0xabb0, 0xabcc }, /* 0x12B4C = 0x12B30 U+0300 */ { 0xabc3, 0xabce }, /* 0x12B4E = 0x12B43 U+0300 */ #define euc_jisx0213_comp_table0301_idx (euc_jisx0213_comp_table0300_idx+euc_jisx0213_comp_table0300_len) #define euc_jisx0213_comp_table0301_len 4 { 0xabb8, 0xabc9 }, /* 0x12B49 = 0x12B38 U+0301 */ { 0xabb7, 0xabcb }, /* 0x12B4B = 0x12B37 U+0301 */ { 0xabb0, 0xabcd }, /* 0x12B4D = 0x12B30 U+0301 */ { 0xabc3, 0xabcf }, /* 0x12B4F = 0x12B43 U+0301 */ #define euc_jisx0213_comp_table309a_idx (euc_jisx0213_comp_table0301_idx+euc_jisx0213_comp_table0301_len) #define euc_jisx0213_comp_table309a_len 14 { 0xa4ab, 0xa4f7 }, /* 0x12477 = 0x1242B U+309A */ { 0xa4ad, 0xa4f8 }, /* 0x12478 = 0x1242D U+309A */ { 0xa4af, 0xa4f9 }, /* 0x12479 = 0x1242F U+309A */ { 0xa4b1, 0xa4fa }, /* 0x1247A = 0x12431 U+309A */ { 0xa4b3, 0xa4fb }, /* 0x1247B = 0x12433 U+309A */ { 0xa5ab, 0xa5f7 }, /* 0x12577 = 0x1252B U+309A */ { 0xa5ad, 0xa5f8 }, /* 0x12578 = 0x1252D U+309A */ { 0xa5af, 0xa5f9 }, /* 0x12579 = 0x1252F U+309A */ { 0xa5b1, 0xa5fa }, /* 0x1257A = 0x12531 U+309A */ { 0xa5b3, 0xa5fb }, /* 0x1257B = 0x12533 U+309A */ { 0xa5bb, 0xa5fc }, /* 0x1257C = 0x1253B U+309A */ { 0xa5c4, 0xa5fd }, /* 0x1257D = 0x12544 U+309A */ { 0xa5c8, 0xa5fe }, /* 0x1257E = 0x12548 U+309A */ { 0xa6f5, 0xa6f8 }, /* 0x12678 = 0x12675 U+309A */ }; static int euc_jisx0213_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int 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 = euc_jisx0213_comp_table02e5_idx, len = euc_jisx0213_comp_table02e5_len; else if (wc == 0x02e9) idx = euc_jisx0213_comp_table02e9_idx, len = euc_jisx0213_comp_table02e9_len; else if (wc == 0x0300) idx = euc_jisx0213_comp_table0300_idx, len = euc_jisx0213_comp_table0300_len; else if (wc == 0x0301) idx = euc_jisx0213_comp_table0301_idx, len = euc_jisx0213_comp_table0301_len; else if (wc == 0x309a) idx = euc_jisx0213_comp_table309a_idx, len = euc_jisx0213_comp_table309a_len; else goto not_combining; do if (euc_jisx0213_comp_table_data[idx].base == lasttwo) break; while (++idx, --len > 0); if (len > 0) { /* Output the combined character. */ if (n >= 2) { lasttwo = euc_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) { /* Plain ASCII character. */ if (n > count) { r[0] = (unsigned char) wc; conv->ostate = 0; return count+1; } else return RET_TOOSMALL; } else if (wc >= 0xff61 && wc <= 0xff9f) { /* Half-width katakana. */ if (n >= count+2) { r[0] = 0x8e; r[1] = wc - 0xfec0; conv->ostate = 0; return count+2; } else return RET_TOOSMALL; } else { unsigned short jch = ucs4_to_jisx0213(wc); if (jch != 0) { 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 = jch | 0x8080; return count+0; } if (jch & 0x8000) { /* JISX 0213 plane 2. */ if (n >= count+3) { r[0] = 0x8f; r[1] = (jch >> 8) | 0x80; r[2] = (jch & 0xff) | 0x80; conv->ostate = 0; return count+3; } else return RET_TOOSMALL; } else { /* JISX 0213 plane 1. */ if (n >= count+2) { r[0] = (jch >> 8) | 0x80; r[1] = (jch & 0xff) | 0x80; conv->ostate = 0; return count+2; } else return RET_TOOSMALL; } } return RET_ILUNI; } } static int euc_jisx0213_reset (conv_t conv, unsigned char *r, int 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; }