1/* Values of decimal digit Unicode characters. 2 Copyright (C) 2002, 2006, 2009-2010 Free Software Foundation, Inc. 3 Written by Bruno Haible <bruno@clisp.org>, 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 18#include <config.h> 19 20/* Specification. */ 21#include "unictype.h" 22 23/* Define u_decdigit table. */ 24#include "decdigit.h" 25 26int 27uc_decimal_value (ucs4_t uc) 28{ 29 unsigned int index1 = uc >> decdigit_header_0; 30 if (index1 < decdigit_header_1) 31 { 32 int lookup1 = u_decdigit.level1[index1]; 33 if (lookup1 >= 0) 34 { 35 unsigned int index2 = (uc >> decdigit_header_2) & decdigit_header_3; 36 int lookup2 = u_decdigit.level2[lookup1 + index2]; 37 if (lookup2 >= 0) 38 { 39 unsigned int index3 = (uc & decdigit_header_4) + lookup2; 40 /* level3 contains 4-bit values. */ 41 unsigned int lookup3 = 42 (u_decdigit.level3[index3>>1] >> ((index3 % 2) * 4)) & 0x0f; 43 44 return (int) lookup3 - 1; 45 } 46 } 47 } 48 return -1; 49} 50