1 /* Values of digit Unicode characters.
2 Copyright (C) 2002, 2006, 2009-2021 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2002.
5 This program is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Lesser General Public License as published
7 by the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
23 /* Define u_digit table. */
27 uc_digit_value (ucs4_t uc
)
29 unsigned int index1
= uc
>> digit_header_0
;
30 if (index1
< digit_header_1
)
32 int lookup1
= u_digit
.level1
[index1
];
35 unsigned int index2
= (uc
>> digit_header_2
) & digit_header_3
;
36 int lookup2
= u_digit
.level2
[lookup1
+ index2
];
39 unsigned int index3
= (uc
& digit_header_4
) + lookup2
;
40 /* level3 contains 4-bit values. */
41 unsigned int lookup3
=
42 (u_digit
.level3
[index3
>>1] >> ((index3
% 2) * 4)) & 0x0f;
44 return (int) lookup3
- 1;