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/* Grapheme cluster break property function.
Copyright (C) 2010-2015 Free Software Foundation, Inc.
Written by Ben Pfaff <blp@cs.stanford.edu>, 2010.
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 "unigbrk.h"
#include "gbrkprop.h"
int
uc_graphemeclusterbreak_property (ucs4_t uc)
{
unsigned int index1 = uc >> gbrkprop_header_0;
if (index1 < gbrkprop_header_1)
{
int lookup1 = unigbrkprop.level1[index1];
if (lookup1 >= 0)
{
unsigned int index2 = (uc >> gbrkprop_header_2) & gbrkprop_header_3;
int lookup2 = unigbrkprop.level2[lookup1 + index2];
if (lookup2 >= 0)
{
unsigned int index3 = uc & gbrkprop_header_4;
unsigned char lookup3 = unigbrkprop.level3[lookup2 + index3 / 2];
return (lookup3 >> ((uc & 1) << 2)) & 0x0f;
}
}
}
return GBP_OTHER;
}
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