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04277e02 | 1 | /* Copyright (C) 2000-2019 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@gnu.org>, 2000. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
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6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
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9 | |
10 | The GNU C Library 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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
4295702f | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
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16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
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18 | |
19 | #include <assert.h> | |
20 | #include <langinfo.h> | |
21 | ||
22 | /* Look up the value of the next multibyte character and return its numerical | |
23 | value if it is one of the digits known in the locale. If *DECIDED is | |
24 | -1 this means it is not yet decided which form it is and we have to | |
25 | search through all available digits. Otherwise we know which script | |
26 | the digits are from. */ | |
27 | static inline int | |
28 | indigitwc_value (wchar_t wc, int *decided) | |
29 | { | |
30 | int from_level; | |
31 | int to_level; | |
32 | const wchar_t *wcdigits[10]; | |
33 | int n; | |
34 | ||
35 | if (*decided != -1) | |
36 | from_level = to_level = *decided; | |
37 | else | |
38 | { | |
39 | from_level = 0; | |
40 | to_level = _NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_INDIGITS_WC_LEN) - 1; | |
41 | assert (from_level <= to_level); | |
42 | } | |
43 | ||
44 | /* In this round we get the pointer to the digit strings and also perform | |
45 | the first round of comparisons. */ | |
46 | for (n = 0; n < 10; ++n) | |
47 | { | |
48 | /* Get the string for the digits with value N. */ | |
49 | wcdigits[n] = _NL_CURRENT (LC_CTYPE, _NL_CTYPE_INDIGITS0_WC + n); | |
eac4282f | 50 | wcdigits[n] += from_level; |
4295702f | 51 | |
a1d84548 | 52 | if (wc == *wcdigits[n]) |
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53 | { |
54 | /* Found it. */ | |
55 | if (*decided == -1) | |
56 | *decided = 0; | |
57 | return n; | |
58 | } | |
59 | ||
60 | /* Advance the pointer to the next string. */ | |
61 | ++wcdigits[n]; | |
62 | } | |
63 | ||
64 | /* Now perform the remaining tests. */ | |
65 | while (++from_level <= to_level) | |
66 | { | |
67 | /* Search all ten digits of this level. */ | |
68 | for (n = 0; n < 10; ++n) | |
69 | { | |
a1d84548 | 70 | if (wc == *wcdigits[n]) |
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71 | { |
72 | /* Found it. */ | |
73 | if (*decided == -1) | |
74 | *decided = from_level; | |
75 | return n; | |
76 | } | |
77 | ||
78 | /* Advance the pointer to the next string. */ | |
79 | ++wcdigits[n]; | |
80 | } | |
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81 | } |
82 | ||
83 | /* If we reach this point no matching digit was found. */ | |
84 | return -1; | |
85 | } |