Mercurial > gnulib
view lib/unictype/decdigit.c @ 40057:b06060465f09
maint: Run 'make update-copyright'
author | Paul Eggert <eggert@cs.ucla.edu> |
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date | Tue, 01 Jan 2019 00:25:11 +0100 |
parents | 10eb9086bea0 |
children |
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/* Values of decimal digit Unicode characters. Copyright (C) 2002, 2006, 2009-2019 Free Software Foundation, Inc. Written by Bruno Haible <bruno@clisp.org>, 2002. 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 <https://www.gnu.org/licenses/>. */ #include <config.h> /* Specification. */ #include "unictype.h" /* Define u_decdigit table. */ #include "decdigit.h" int uc_decimal_value (ucs4_t uc) { unsigned int index1 = uc >> decdigit_header_0; if (index1 < decdigit_header_1) { int lookup1 = u_decdigit.level1[index1]; if (lookup1 >= 0) { unsigned int index2 = (uc >> decdigit_header_2) & decdigit_header_3; int lookup2 = u_decdigit.level2[lookup1 + index2]; if (lookup2 >= 0) { unsigned int index3 = (uc & decdigit_header_4) + lookup2; /* level3 contains 4-bit values. */ unsigned int lookup3 = (u_decdigit.level3[index3>>1] >> ((index3 % 2) * 4)) & 0x0f; return (int) lookup3 - 1; } } } return -1; }