1 /* Three-level bitmap lookup. 2 Copyright (C) 2000-2002, 2005-2007, 2009-2021 Free Software Foundation, Inc. 3 Written by Bruno Haible <bruno@clisp.org>, 2000-2002. 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 static inline int identsyntax_lookup (ucs4_t uc); 27 28 static inline int 29 identsyntax_lookup (ucs4_t uc) /* */ 30 { 31 unsigned int index1 = uc >> identsyntax_header_0; 32 if (index1 < identsyntax_header_1) 33 { 34 int lookup1 = TABLE.level1[index1]; 35 if (lookup1 >= 0) 36 { 37 unsigned int index2 = (uc >> identsyntax_header_2) & identsyntax_header_3; 38 int lookup2 = TABLE.level2[lookup1 + index2]; 39 if (lookup2 >= 0) 40 { 41 unsigned int index3 = (uc & identsyntax_header_4) + lookup2; 42 /* level3 contains 2-bit values. */ 43 unsigned int lookup3 = TABLE.level3[index3 >> 3]; 44 45 return (lookup3 >> (2 * (index3 & 7))) & 3; 46 } 47 } 48 } 49 return UC_IDENTIFIER_INVALID; 50 }