Mercurial > gnulib
view lib/unictype/mirror.c @ 29162:c7c2e5573f14
Unicode character classification functions.
author | Bruno Haible <bruno@clisp.org> |
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date | Tue, 13 Nov 2007 00:15:53 +0100 |
parents | |
children | e8d2c6fc33ad |
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/* Mirrored Unicode characters. Copyright (C) 2002, 2006 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 <http://www.gnu.org/licenses/>. */ #include <config.h> /* Specification. */ #include "unictype.h" /* Define u_mirror table. */ #include "mirror.h" bool uc_mirror_char (ucs4_t uc, ucs4_t *puc) { unsigned int index1 = uc >> mirror_header_0; if (index1 < mirror_header_1) { int lookup1 = u_mirror.level1[index1]; if (lookup1 >= 0) { unsigned int index2 = (uc >> mirror_header_2) & mirror_header_3; int lookup2 = u_mirror.level2[lookup1 + index2]; if (lookup2 >= 0) { unsigned int index3 = (uc & mirror_header_4); int lookup3 = u_mirror.level3[lookup2 + index3]; *puc = uc + lookup3; return (lookup3 != 0); } } } *puc = uc; return false; }