1/* Three-level bitmap lookup. 2 Copyright (C) 2000-2002, 2005-2007, 2009-2010 Free Software Foundation, Inc. 3 Written by Bruno Haible <bruno@clisp.org>, 2000-2002. 4 5 This program is free software: you can redistribute it and/or modify it 6 under the terms of the GNU Lesser General Public License as published 7 by the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18static inline int identsyntax_lookup (ucs4_t uc); 19 20static inline int 21identsyntax_lookup (ucs4_t uc) 22{ 23 unsigned int index1 = uc >> identsyntax_header_0; 24 if (index1 < identsyntax_header_1) 25 { 26 int lookup1 = TABLE.level1[index1]; 27 if (lookup1 >= 0) 28 { 29 unsigned int index2 = (uc >> identsyntax_header_2) & identsyntax_header_3; 30 int lookup2 = TABLE.level2[lookup1 + index2]; 31 if (lookup2 >= 0) 32 { 33 unsigned int index3 = (uc & identsyntax_header_4) + lookup2; 34 /* level3 contains 2-bit values. */ 35 unsigned int lookup3 = TABLE.level3[index3 >> 3]; 36 37 return (lookup3 >> (2 * (index3 & 7))) & 3; 38 } 39 } 40 } 41 return UC_IDENTIFIER_INVALID; 42} 43