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/* Values of digit Unicode characters.
Copyright (C) 2002, 2006, 2009-2022 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2002.
This file is free software.
It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
You can redistribute it and/or modify it under either
- the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 3, or (at your
option) any later version, or
- the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option)
any later version, or
- the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
This file 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 and the GNU General Public License
for more details.
You should have received a copy of the GNU Lesser General Public
License and of the GNU General Public License along with this
program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include "unictype.h"
/* Define u_digit table. */
#include "digit.h"
int
uc_digit_value (ucs4_t uc)
{
unsigned int index1 = uc >> digit_header_0;
if (index1 < digit_header_1)
{
int lookup1 = u_digit.level1[index1];
if (lookup1 >= 0)
{
unsigned int index2 = (uc >> digit_header_2) & digit_header_3;
int lookup2 = u_digit.level2[lookup1 + index2];
if (lookup2 >= 0)
{
unsigned int index3 = (uc & digit_header_4) + lookup2;
/* level3 contains 4-bit values. */
unsigned int lookup3 =
(u_digit.level3[index3>>1] >> ((index3 % 2) * 4)) & 0x0f;
return (int) lookup3 - 1;
}
}
}
return -1;
}
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