1/* Values of numeric Unicode characters.
2   Copyright (C) 2002, 2006-2007, 2009-2010 Free Software Foundation, Inc.
3   Written by Bruno Haible <bruno@clisp.org>, 2002.
4
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.
9
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.
14
15   You should have received a copy of the GNU Lesser General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18#include <config.h>
19
20/* Specification.  */
21#include "unictype.h"
22
23/* Define u_numeric_values and u_numeric tables.  */
24#include "numeric.h"
25
26uc_fraction_t
27uc_numeric_value (ucs4_t uc)
28{
29  unsigned int index1 = uc >> numeric_header_0;
30  if (index1 < numeric_header_1)
31    {
32      int lookup1 = u_numeric.level1[index1];
33      if (lookup1 >= 0)
34        {
35          unsigned int index2 = (uc >> numeric_header_2) & numeric_header_3;
36          int lookup2 = u_numeric.level2[lookup1 + index2];
37          if (lookup2 >= 0)
38            {
39              unsigned int index3 = ((uc & numeric_header_4) + lookup2) * 7;
40              /* level3 contains 7-bit values, packed into 16-bit words.  */
41              unsigned int lookup3 =
42                ((u_numeric.level3[index3>>4]
43                  | (u_numeric.level3[(index3>>4)+1] << 16))
44                 >> (index3 % 16))
45                & 0x7f;
46
47              return u_numeric_values[lookup3];
48            }
49        }
50    }
51  {
52    const uc_fraction_t default_value = { 0, 0 };
53    return default_value;
54  }
55}
56