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b168057a | 1 | /* Copyright (C) 2000-2015 Free Software Foundation, Inc. |
25337753 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Bruno Haible <haible@clisp.cons.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 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. | |
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 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
25337753 UD |
18 | |
19 | #include <stdint.h> | |
20 | ||
21 | /* Lookup in a table of int32_t, with default value 0. */ | |
22 | int32_t | |
23 | internal_function | |
24 | __collidx_table_lookup (const char *table, uint32_t wc) | |
25 | { | |
26 | uint32_t shift1 = ((const uint32_t *) table)[0]; | |
27 | uint32_t index1 = wc >> shift1; | |
28 | uint32_t bound = ((const uint32_t *) table)[1]; | |
29 | if (index1 < bound) | |
30 | { | |
31 | uint32_t lookup1 = ((const uint32_t *) table)[5 + index1]; | |
32 | if (lookup1 != 0) | |
33 | { | |
34 | uint32_t shift2 = ((const uint32_t *) table)[2]; | |
35 | uint32_t mask2 = ((const uint32_t *) table)[3]; | |
36 | uint32_t index2 = (wc >> shift2) & mask2; | |
37 | uint32_t lookup2 = ((const uint32_t *)(table + lookup1))[index2]; | |
38 | if (lookup2 != 0) | |
39 | { | |
40 | uint32_t mask3 = ((const uint32_t *) table)[4]; | |
41 | uint32_t index3 = wc & mask3; | |
42 | int32_t lookup3 = ((const int32_t *)(table + lookup2))[index3]; | |
43 | ||
44 | return lookup3; | |
45 | } | |
46 | } | |
47 | } | |
48 | return 0; | |
49 | } | |
50 | ||
51 | ||
52 | /* Lookup in a table of uint32_t, with default value 0xffffffff. */ | |
53 | uint32_t | |
54 | internal_function | |
55 | __collseq_table_lookup (const char *table, uint32_t wc) | |
56 | { | |
57 | uint32_t shift1 = ((const uint32_t *) table)[0]; | |
58 | uint32_t index1 = wc >> shift1; | |
59 | uint32_t bound = ((const uint32_t *) table)[1]; | |
60 | if (index1 < bound) | |
61 | { | |
62 | uint32_t lookup1 = ((const uint32_t *) table)[5 + index1]; | |
63 | if (lookup1 != 0) | |
64 | { | |
65 | uint32_t shift2 = ((const uint32_t *) table)[2]; | |
66 | uint32_t mask2 = ((const uint32_t *) table)[3]; | |
67 | uint32_t index2 = (wc >> shift2) & mask2; | |
68 | uint32_t lookup2 = ((const uint32_t *)(table + lookup1))[index2]; | |
69 | if (lookup2 != 0) | |
70 | { | |
71 | uint32_t mask3 = ((const uint32_t *) table)[4]; | |
72 | uint32_t index3 = wc & mask3; | |
73 | uint32_t lookup3 = ((const uint32_t *)(table + lookup2))[index3]; | |
74 | ||
75 | return lookup3; | |
76 | } | |
77 | } | |
78 | } | |
79 | return ~((uint32_t) 0); | |
80 | } |