From fa095a4504cbe668e4244547e2c141597bea4ecf Mon Sep 17 00:00:00 2001 From: Andreas Rottmann Date: Mon, 14 Sep 2009 12:32:44 +0200 Subject: Imported Upstream version 0.9.1 --- lib/uninorm/composition.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 lib/uninorm/composition.c (limited to 'lib/uninorm/composition.c') diff --git a/lib/uninorm/composition.c b/lib/uninorm/composition.c new file mode 100644 index 00000000..4caf9a06 --- /dev/null +++ b/lib/uninorm/composition.c @@ -0,0 +1,85 @@ +/* Canonical composition of Unicode characters. + Copyright (C) 2002, 2006, 2009 Free Software Foundation, Inc. + Written by Bruno Haible , 2009. + + This program 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 3 of the License, or + (at your option) any later version. + + This program 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 this program. If not, see . */ + +#include + +/* Specification. */ +#include "uninorm.h" + +#include + +struct composition_rule { char codes[4]; unsigned short combined; }; + +#include "composition-table.h" + +ucs4_t +uc_composition (ucs4_t uc1, ucs4_t uc2) +{ + if (uc1 < 0x10000 && uc2 < 0x10000) + { + if (uc2 >= 0x1161 && uc2 < 0x1161 + 21 + && uc1 >= 0x1100 && uc1 < 0x1100 + 19) + { + /* Hangul: Combine single letter L and single letter V to form + two-letter syllable LV. */ + return 0xAC00 + ((uc1 - 0x1100) * 21 + (uc2 - 0x1161)) * 28; + } + else if (uc2 > 0x11A7 && uc2 < 0x11A7 + 28 + && uc1 >= 0xAC00 && uc1 < 0xD7A4 && ((uc1 - 0xAC00) % 28) == 0) + { + /* Hangul: Combine two-letter syllable LV with single-letter T + to form three-letter syllable LVT. */ + return uc1 + (uc2 - 0x11A7); + } + else + { +#if 0 + unsigned int uc = MUL1 * uc1 * MUL2 * uc2; + unsigned int index1 = uc >> composition_header_0; + if (index1 < composition_header_1) + { + int lookup1 = u_composition.level1[index1]; + if (lookup1 >= 0) + { + unsigned int index2 = (uc >> composition_header_2) & composition_header_3; + int lookup2 = u_composition.level2[lookup1 + index2]; + if (lookup2 >= 0) + { + unsigned int index3 = (uc & composition_header_4); + unsigned int lookup3 = u_composition.level3[lookup2 + index3]; + if ((lookup3 >> 16) == uc2) + return lookup3 & ((1U << 16) - 1); + } + } + } +#else + char codes[4]; + const struct composition_rule *rule; + + codes[0] = (uc1 >> 8) & 0xff; + codes[1] = uc1 & 0xff; + codes[2] = (uc2 >> 8) & 0xff; + codes[3] = uc2 & 0xff; + + rule = gl_uninorm_compose_lookup (codes, 4); + if (rule != NULL) + return rule->combined; +#endif + } + } + return 0; +} -- cgit v1.2.3