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1 | /* Copyright (C) 2000 Free Software Foundation, Inc. |
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 | |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
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 | |
13 | Library General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Library General Public | |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #include <assert.h> | |
21 | #include <langinfo.h> | |
22 | #include <string.h> | |
23 | ||
24 | /* Look up the value of the next multibyte character and return its numerical | |
25 | value if it is one of the digits known in the locale. If *DECIDED is | |
26 | -1 this means it is not yet decided which form it is and we have to | |
27 | search through all available digits. Otherwise we know which script | |
28 | the digits are from. */ | |
29 | static inline int | |
30 | indigit_value (const char **s, size_t *len, int *decided) | |
31 | { | |
32 | int from_level; | |
33 | int to_level; | |
34 | const char *mbdigits[10]; | |
eac4282f | 35 | int i; |
4295702f UD |
36 | int n; |
37 | ||
38 | if (*decided != -1) | |
39 | from_level = to_level = *decided; | |
40 | else | |
41 | { | |
42 | from_level = 0; | |
43 | to_level = _NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_INDIGITS_MB_LEN) - 1; | |
44 | assert (from_level <= to_level); | |
45 | } | |
46 | ||
47 | /* In this round we get the pointer to the digit strings and also perform | |
48 | the first round of comparisons. */ | |
49 | for (n = 0; n < 10; ++n) | |
50 | { | |
51 | size_t dlen; | |
52 | ||
53 | /* Get the string for the digits with value N. */ | |
54 | mbdigits[n] = _NL_CURRENT (LC_CTYPE, _NL_CTYPE_INDIGITS0_MB + n); | |
55 | dlen = strlen (mbdigits[n]); | |
56 | ||
eac4282f UD |
57 | if (from_level == 0 && dlen <= *len |
58 | && memcmp (*s, mbdigits[n], dlen) == 0) | |
4295702f UD |
59 | { |
60 | /* Found it. */ | |
61 | *s += dlen; | |
eac4282f | 62 | *len -= dlen; |
4295702f UD |
63 | if (*decided == -1) |
64 | *decided = 0; | |
65 | return n; | |
66 | } | |
67 | ||
68 | /* Advance the pointer to the next string. */ | |
69 | mbdigits[n] += dlen + 1; | |
70 | } | |
71 | ||
72 | /* Now perform the remaining tests. */ | |
eac4282f | 73 | for (i = 1; i <= to_level; ++i) |
4295702f UD |
74 | { |
75 | /* Search all ten digits of this level. */ | |
76 | for (n = 0; n < 10; ++n) | |
77 | { | |
78 | size_t dlen = strlen (mbdigits[n]); | |
79 | ||
eac4282f UD |
80 | if (i >= from_level && dlen <= *len |
81 | && memcmp (*s, mbdigits[n], dlen) == 0) | |
4295702f UD |
82 | { |
83 | /* Found it. */ | |
84 | *s += dlen; | |
eac4282f | 85 | *len -= dlen; |
4295702f UD |
86 | if (*decided == -1) |
87 | *decided = from_level; | |
88 | return n; | |
89 | } | |
90 | ||
91 | /* Advance the pointer to the next string. */ | |
92 | mbdigits[n] += dlen + 1; | |
93 | } | |
4295702f UD |
94 | } |
95 | ||
96 | /* If we reach this point no matching digit was found. */ | |
97 | return -1; | |
98 | } |