| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2000-2015 Free Software Foundation, Inc. |
| 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 |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 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 | } |