1 /* Grapheme cluster break property function. 2 Copyright (C) 2010-2021 Free Software Foundation, Inc. 3 Written by Ben Pfaff <blp@cs.stanford.edu>, 2010. 4 5 This file is free software. 6 It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+". 7 You can redistribute it and/or modify it under either 8 - the terms of the GNU Lesser General Public License as published 9 by the Free Software Foundation; either version 3, or (at your 10 option) any later version, or 11 - the terms of the GNU General Public License as published by the 12 Free Software Foundation; either version 2, or (at your option) 13 any later version, or 14 - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+". 15 16 This file is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 Lesser General Public License and the GNU General Public License 20 for more details. 21 22 You should have received a copy of the GNU Lesser General Public 23 License and of the GNU General Public License along with this 24 program. If not, see <https://www.gnu.org/licenses/>. */ 25 26 #include <config.h> 27 28 /* Specification. */ 29 #include "unigbrk.h" 30 31 #include "gbrkprop.h" 32 33 int 34 uc_graphemeclusterbreak_property (ucs4_t uc) /* */ 35 { 36 unsigned int index1 = uc >> gbrkprop_header_0; 37 if (index1 < gbrkprop_header_1) 38 { 39 int lookup1 = unigbrkprop.level1[index1]; 40 if (lookup1 >= 0) 41 { 42 unsigned int index2 = (uc >> gbrkprop_header_2) & gbrkprop_header_3; 43 int lookup2 = unigbrkprop.level2[lookup1 + index2]; 44 if (lookup2 >= 0) 45 { 46 unsigned int index3 = uc & gbrkprop_header_4; 47 return unigbrkprop.level3[lookup2 + index3]; 48 } 49 } 50 } 51 return GBP_OTHER; 52 }