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thodg/libiconv/lib/gb18030.h
Bruno Haible
- lib/gb18030.h
-
/* * Copyright (C) 1999-2001, 2005, 2012, 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 <http://www.gnu.org/licenses/>. */ /* * GB18030 */ /* * GB18030, as specified in the GB18030 standard, is an extension of GBK. * * In what follows, page numbers refer to the GB18030 standard (second * printing). * * * It consists of the following parts: * * One-byte range: * ASCII p. 2 0x{00..7F} * * Two-byte range: * GBK part 1 p. 10..12 0x{A1..A9}{A1..FE} * GBK part 2 p. 13..36 0x{B0..F7}{A1..FE} * GBK part 3 p. 37..52 0x{81..A0}{40..7E,80..FE} * GBK part 4 p. 53..81 0x{AA..FE}{40..7E,80..A0} * GBK part 5 p. 82 0x{A8..A9}{40..7E,80..A0} * UDA part 1 p. 83..84 0x{AA..AF}{A1..FE} U+E000..U+E233 * UDA part 2 p. 85..87 0x{F8..FE}{A1..FE} U+E234..U+E4C5 * UDA part 3 p. 88..90 0x{A1..A7}{40..7E,80..A0} U+E4C6..U+E765 * * Four-byte range: * BMP rest p. 94..283 0x{81..84}{30..39}{81..FE}{30..39} * rest of U+0080..U+FFFF * Planes 1-16 p. 5 0x{90..FE}{30..39}{81..FE}{30..39} * U+10000..U+10FFFF * * To GBK part 1 were added: * 1. 0xA2E3, 0xA8BF. * 2. Characters mapped to the Unicode PUA * 0xA2AB..0xA2B0 U+E766..U+E76B * 0xA2E4 U+E76D * 0xA2EF..0xA2F0 U+E76E..U+E76F * 0xA2FD..0xA2FE U+E770..U+E771 * 0xA4F4..0xA4FE U+E772..U+E77C * 0xA5F7..0xA5FE U+E77D..U+E784 * 0xA6B9..0xA6C0 U+E785..U+E78C * 0xA6D9..0xA6DF [glyphs here!!] U+E78D..U+E793 * 0xA6EC..0xA6ED [glyphs here!!] U+E794..U+E795 * 0xA6F3 [glyphs here!!] U+E796 * 0xA6F6..0xA6FE U+E797..U+E79F * 0xA7C2..0xA7D0 U+E7A0..U+E7AE * 0xA7F2..0xA7FE U+E7AF..U+E7BB * 0xA8BC [glyphs here!!] U+E7C7 * 0xA8C1..0xA8C4 U+E7C9..U+E7CC * 0xA8EA..0xA8FE U+E7CD..U+E7E1 * 0xA9A1..0xA9A3 U+E7FE..U+E800 * 0xA9F0..0xA9FE U+E801..U+E80F * * To GBK part 2 were added: * 3. Characters mapped to the Unicode PUA * 0xD7FA..0xD7FE U+E810..0xE814 * * To GBK part 3 nothing was added. * * To GBK part 4 were added: * 4. 0xFE{50,54..58,5A..60,62..65,68..6B,6E..75,77..7D,80..8F,92..9F}. * 5. Characters mapped to the Unicode PUA * 0xFE51..0xFE53 [glyphs here!!] U+E816..U+E818 * 0xFE59 [glyphs here!!] U+E81E * 0xFE61 [glyphs here!!] U+E826 * 0xFE66..0xFE67 [glyphs here!!] U+E82B..U+E82C * 0xFE6C..0xFE6D [glyphs here!!] U+E831..U+E832 * 0xFE76 [glyphs here!!] U+E83B * 0xFE7E [glyphs here!!] U+E843 * 0xFE90..0xFE91 [glyphs here!!] U+E854..U+E855 * 0xFEA0 [glyphs here!!] U+E864 * * To GBK part 5 were added: * 6. 0xA98A..0xA995. * 7. Characters mapped to the Unicode PUA * 0xA896..0xA8A0 U+E7BC..U+E7C6 * 0xA958 U+E7E2 * 0xA95B U+E7E3 * 0xA95D..0xA95F U+E7E4..U+E7E6 * 0xA997..0xA9A0 U+E7F4..U+E7FD * * UDA part 1 contains the user-defined characters, mapped to the Unicode PUA * U+E000..U+E233 in ascending order. * * UDA part 2 contains the user-defined characters, mapped to the Unicode PUA * U+E234..U+E4C5 in ascending order. * * UDA part 3 contains the user-defined characters, mapped to the Unicode PUA * U+E4C6..U+E765 in ascending order. * * The four-byte range 0x{81..84}{30..39}{81..FE}{30..39} * contains the rest of the Unicode BMP in ascending order. * Start: 0x81308130 = 0x0080 * End: 0x8431A439 = 0xFFFF * * The four-byte range 0x{90..E3}{30..39}{81..FE}{30..39} * contains the remaining 16 Unicode planes in Unicode order. * Start: 0x90308130 = 0x010000 * End: 0xE3329A35 = 0x10FFFF * * * Unassigned Unicode characters are mapped. For example, * U+173F = 0x8134BF35 (p. 120) * U+2EFF = 0x81398B31 (p. 148) * U+FFFE = 0x8431A438 (p. 283) * * * The Unicode PUA (U+E000..U+F8FF) is mapped as follows: * p. 83..84 0x{AA..AF}{A1..FE} U+E000..U+E233 * p. 85..87 0x{F8..FE}{A1..FE} U+E234..U+E4C5 * p. 88..90 0x{A1..A7}{40..7E,80..A0} U+E4C6..U+E765 * p. 10 0xA2AB..0xA2B0 U+E766..U+E76B * p. 255 0x8336C739 U+E76C * p. 10 0xA2E4 U+E76D * p. 10 0xA2EF..0xA2F0 U+E76E..U+E76F * p. 10 0xA2FD..0xA2FE U+E770..U+E771 * p. 11 0xA4F4..0xA4FE U+E772..U+E77C * p. 11 0xA5F7..0xA5FE U+E77D..U+E784 * p. 11 0xA6B9..0xA6C0 U+E785..U+E78C * p. 11 0xA6D9..0xA6DF [glyphs here!!] U+E78D..U+E793 * p. 11 0xA6EC..0xA6ED [glyphs here!!] U+E794..U+E795 * p. 11 0xA6F3 [glyphs here!!] U+E796 * p. 11 0xA6F6..0xA6FE U+E797..U+E79F * p. 12 0xA7C2..0xA7D0 U+E7A0..U+E7AE * p. 12 0xA7F2..0xA7FE U+E7AF..U+E7BB * p. 82 0xA896..0xA8A0 U+E7BC..U+E7C6 * p. 12 0x8135F437 U+E7C7 * p. 255 0x8336C830 U+E7C8 * p. 12 0xA8C1..0xA8C4 U+E7C9..U+E7CC * p. 12 0xA8EA..0xA8FE U+E7CD..U+E7E1 * p. 82 0xA958 U+E7E2 * p. 82 0xA95B U+E7E3 * p. 82 0xA95D..0xA95F U+E7E4..U+E7E6 * p. 255 0x8336C831..0x8336C933 U+E7E7..U+E7F3 * p. 82 0xA997..0xA9A0 U+E7F4..U+E7FD * p. 12 0xA9A1..0xA9A3 U+E7FE..U+E800 * p. 12 0xA9F0..0xA9FE U+E801..U+E80F * p. 26 0xD7FA..0xD7FE U+E810..0xE814 * p. 255 0x8336C934 U+E815 * p. 81 0xFE51..0xFE53 [glyphs here!!] U+E816..U+E818 * p. 255 0x8336C935..0x8336C939 U+E819..U+E81D * p. 81 0xFE59 [glyphs here!!] U+E81E * p. 255 0x8336CA30..0x8336CA36 U+E81F..U+E825 * p. 81 0xFE61 [glyphs here!!] U+E826 * p. 255 0x8336CA37..0x8336CB30 U+E827..U+E82A * p. 81 0xFE66..0xFE67 [glyphs here!!] U+E82B..U+E82C * p. 255 0x8336CB31..0x8336CB34 U+E82D..U+E830 * p. 81 0xFE6C..0xFE6D [glyphs here!!] U+E831..U+E832 * p. 255 0x8336CB35..0x8336CC32 U+E833..U+E83A * p. 81 0xFE76 [glyphs here!!] U+E83B * p. 255 0x8336CC33..0x8336CC39 U+E83C..U+E842 * p. 81 0xFE7E [glyphs here!!] U+E843 * p. 255 0x8336CD30..0x8336CE35 U+E844..U+E853 * p. 81 0xFE90..0xFE91 [glyphs here!!] U+E854..U+E855 * p. 255 0x8336CE36..0x8336CF39 U+E856..U+E863 * p. 81 0xFEA0 [glyphs here!!] U+E864 * p. 255..276 0x8336D030..0x84308130 U+E865..U+F8FF * * * The Unicode surrogate area (U+D800..U+DFFF) is not mapped. (p. 255) * */ #include "gb18030ext.h" #include "gb18030uni.h" static int gb18030_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n) { int ret; /* Code set 0 (ASCII) */ if (*s < 0x80) return ascii_mbtowc(conv,pwc,s,n); /* Code set 1 (GBK extended) */ ret = gbk_mbtowc(conv,pwc,s,n); if (ret != RET_ILSEQ) return ret; ret = gb18030ext_mbtowc(conv,pwc,s,n); if (ret != RET_ILSEQ) return ret; /* Code set 2 (remainder of Unicode U+0000..U+FFFF), including User-defined characters, two-byte part of range U+E766..U+E864 */ ret = gb18030uni_mbtowc(conv,pwc,s,n); if (ret != RET_ILSEQ) return ret; /* User-defined characters range U+E000..U+E765 */ { unsigned char c1 = s[0]; if ((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) { if (n >= 2) { unsigned char c2 = s[1]; if (c2 >= 0xa1 && c2 <= 0xfe) { *pwc = 0xe000 + 94 * (c1 >= 0xf8 ? c1 - 0xf2 : c1 - 0xaa) + (c2 - 0xa1); return 2; } } else return RET_TOOFEW(0); } else if (c1 >= 0xa1 && c1 <= 0xa7) { if (n >= 2) { unsigned char c2 = s[1]; if (c2 >= 0x40 && c2 <= 0xa1 && c2 != 0x7f) { *pwc = 0xe4c6 + 96 * (c1 - 0xa1) + c2 - (c2 >= 0x80 ? 0x41 : 0x40); return 2; } } else return RET_TOOFEW(0); } } /* Code set 3 (Unicode U+10000..U+10FFFF) */ { unsigned char c1 = s[0]; if (c1 >= 0x90 && c1 <= 0xe3) { if (n >= 2) { unsigned char c2 = s[1]; if (c2 >= 0x30 && c2 <= 0x39) { if (n >= 3) { unsigned char c3 = s[2]; if (c3 >= 0x81 && c3 <= 0xfe) { if (n >= 4) { unsigned char c4 = s[3]; if (c4 >= 0x30 && c4 <= 0x39) { unsigned int i = (((c1 - 0x90) * 10 + (c2 - 0x30)) * 126 + (c3 - 0x81)) * 10 + (c4 - 0x30); if (i >= 0 && i < 0x100000) { *pwc = (ucs4_t) (0x10000 + i); return 4; } } return RET_ILSEQ; } return RET_TOOFEW(0); } return RET_ILSEQ; } return RET_TOOFEW(0); } return RET_ILSEQ; } return RET_TOOFEW(0); } return RET_ILSEQ; } } static const unsigned short gb18030_pua2charset[31*3] = { /* Unicode range GB18030 range */ 0xe766, 0xe76b, 0xa2ab, /*.. 0xa2b0, */ 0xe76d, 0xe76d, 0xa2e4, 0xe76e, 0xe76f, 0xa2ef, /*.. 0xa2f0, */ 0xe770, 0xe771, 0xa2fd, /*.. 0xa2fe, */ 0xe772, 0xe77c, 0xa4f4, /*.. 0xa4fe, */ 0xe77d, 0xe784, 0xa5f7, /*.. 0xa5fe, */ 0xe785, 0xe78c, 0xa6b9, /*.. 0xa6c0, */ 0xe78d, 0xe793, 0xa6d9, /*.. 0xa6df, */ 0xe794, 0xe795, 0xa6ec, /*.. 0xa6ed, */ 0xe796, 0xe796, 0xa6f3, 0xe797, 0xe79f, 0xa6f6, /*.. 0xa6fe, */ 0xe7a0, 0xe7ae, 0xa7c2, /*.. 0xa7d0, */ 0xe7af, 0xe7bb, 0xa7f2, /*.. 0xa7fe, */ 0xe7bc, 0xe7c6, 0xa896, /*.. 0xa8a0, */ 0xe7c9, 0xe7cc, 0xa8c1, /*.. 0xa8c4, */ 0xe7cd, 0xe7e1, 0xa8ea, /*.. 0xa8fe, */ 0xe7e2, 0xe7e2, 0xa958, 0xe7e3, 0xe7e3, 0xa95b, 0xe7e4, 0xe7e6, 0xa95d, /*.. 0xa95f, */ 0xe7f4, 0xe800, 0xa997, /*.. 0xa9a3, */ 0xe801, 0xe80f, 0xa9f0, /*.. 0xa9fe, */ 0xe810, 0xe814, 0xd7fa, /*.. 0xd7fe, */ 0xe816, 0xe818, 0xfe51, /*.. 0xfe53, */ 0xe81e, 0xe81e, 0xfe59, 0xe826, 0xe826, 0xfe61, 0xe82b, 0xe82c, 0xfe66, /*.. 0xfe67, */ 0xe831, 0xe832, 0xfe6c, /*.. 0xfe6d, */ 0xe83b, 0xe83b, 0xfe76, 0xe843, 0xe843, 0xfe7e, 0xe854, 0xe855, 0xfe90, /*.. 0xfe91, */ 0xe864, 0xe864, 0xfea0, }; static int gb18030_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n) { int ret; /* Code set 0 (ASCII) */ ret = ascii_wctomb(conv,r,wc,n); if (ret != RET_ILUNI) return ret; /* Code set 1 (GBK extended) */ ret = gbk_wctomb(conv,r,wc,n); if (ret != RET_ILUNI) return ret; ret = gb18030ext_wctomb(conv,r,wc,n); if (ret != RET_ILUNI) return ret; /* Code set 2 (remainder of Unicode U+0000..U+FFFF) */ if (wc >= 0xe000 && wc <= 0xe864) { if (n >= 2) { if (wc < 0xe766) { /* User-defined characters range U+E000..U+E765 */ if (wc < 0xe4c6) { unsigned int i = wc - 0xe000; r[1] = (i % 94) + 0xa1; i = i / 94; r[0] = (i < 6 ? i + 0xaa : i + 0xf2); return 2; } else { unsigned int i = wc - 0xe4c6; r[0] = (i / 96) + 0xa1; i = i % 96; r[1] = i + (i >= 0x3f ? 0x41 : 0x40); return 2; } } else { /* User-defined characters, two-byte part of range U+E766..U+E864 */ unsigned int k1 = 0; unsigned int k2 = 31; /* Invariant: We know that if wc occurs in Unicode interval in gb18030_pua2charset, it does so at a k with k1 <= k < k2. */ while (k1 < k2) { unsigned int k = (k1 + k2) / 2; if (wc < gb18030_pua2charset[k*3+0]) k2 = k; else if (wc > gb18030_pua2charset[k*3+1]) k1 = k + 1; else { unsigned short c = gb18030_pua2charset[k*3+2] + (wc - gb18030_pua2charset[k*3+0]); r[0] = (c >> 8); r[1] = (c & 0xff); return 2; } } } } else return RET_TOOSMALL; } ret = gb18030uni_wctomb(conv,r,wc,n); if (ret != RET_ILUNI) return ret; /* Code set 3 (Unicode U+10000..U+10FFFF) */ if (n >= 4) { if (wc >= 0x10000 && wc < 0x110000) { unsigned int i = wc - 0x10000; r[3] = (i % 10) + 0x30; i = i / 10; r[2] = (i % 126) + 0x81; i = i / 126; r[1] = (i % 10) + 0x30; i = i / 10; r[0] = i + 0x90; return 4; } return RET_ILUNI; } return RET_TOOSMALL; }