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/* Categories of Unicode characters.
Copyright (C) 2002, 2006-2007, 2009-2015 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_category table. */
#include "categ_of.h"
static inline int
lookup_withtable (ucs4_t uc)
{
unsigned int index1 = uc >> category_header_0;
if (index1 < category_header_1)
{
int lookup1 = u_category.level1[index1];
if (lookup1 >= 0)
{
unsigned int index2 = (uc >> category_header_2) & category_header_3;
int lookup2 = u_category.level2[lookup1 + index2];
if (lookup2 >= 0)
{
unsigned int index3 = ((uc & category_header_4) + lookup2) * 5;
/* level3 contains 5-bit values, packed into 16-bit words. */
unsigned int lookup3 =
((u_category.level3[index3>>4]
| ((unsigned int) u_category.level3[(index3>>4)+1] << 16))
>> (index3 % 16))
& 0x1f;
return lookup3;
}
}
return 29; /* = log2(UC_CATEGORY_MASK_Cn) */
}
return -1;
}
bool
uc_is_general_category_withtable (ucs4_t uc, uint32_t bitmask)
{
int bit = lookup_withtable (uc);
if (bit >= 0)
return ((bitmask >> bit) & 1);
else
return false;
}
uc_general_category_t
uc_general_category (ucs4_t uc)
{
int bit = lookup_withtable (uc);
uc_general_category_t result;
if (bit >= 0)
{
result.bitmask = 1 << bit;
result.generic = 1;
result.lookup.lookup_fn = &uc_is_general_category_withtable;
return result;
}
else
return _UC_CATEGORY_NONE;
}
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