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glibc/locale/coll-lookup.c
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/* Copyright (C) 2000-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Bruno Haible <haible@clisp.cons.org>, 2000. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <stdint.h> | |
/* Lookup in a table of int32_t, with default value 0. */ | |
int32_t | |
internal_function | |
__collidx_table_lookup (const char *table, uint32_t wc) | |
{ | |
uint32_t shift1 = ((const uint32_t *) table)[0]; | |
uint32_t index1 = wc >> shift1; | |
uint32_t bound = ((const uint32_t *) table)[1]; | |
if (index1 < bound) | |
{ | |
uint32_t lookup1 = ((const uint32_t *) table)[5 + index1]; | |
if (lookup1 != 0) | |
{ | |
uint32_t shift2 = ((const uint32_t *) table)[2]; | |
uint32_t mask2 = ((const uint32_t *) table)[3]; | |
uint32_t index2 = (wc >> shift2) & mask2; | |
uint32_t lookup2 = ((const uint32_t *)(table + lookup1))[index2]; | |
if (lookup2 != 0) | |
{ | |
uint32_t mask3 = ((const uint32_t *) table)[4]; | |
uint32_t index3 = wc & mask3; | |
int32_t lookup3 = ((const int32_t *)(table + lookup2))[index3]; | |
return lookup3; | |
} | |
} | |
} | |
return 0; | |
} | |
/* Lookup in a table of uint32_t, with default value 0xffffffff. */ | |
uint32_t | |
internal_function | |
__collseq_table_lookup (const char *table, uint32_t wc) | |
{ | |
uint32_t shift1 = ((const uint32_t *) table)[0]; | |
uint32_t index1 = wc >> shift1; | |
uint32_t bound = ((const uint32_t *) table)[1]; | |
if (index1 < bound) | |
{ | |
uint32_t lookup1 = ((const uint32_t *) table)[5 + index1]; | |
if (lookup1 != 0) | |
{ | |
uint32_t shift2 = ((const uint32_t *) table)[2]; | |
uint32_t mask2 = ((const uint32_t *) table)[3]; | |
uint32_t index2 = (wc >> shift2) & mask2; | |
uint32_t lookup2 = ((const uint32_t *)(table + lookup1))[index2]; | |
if (lookup2 != 0) | |
{ | |
uint32_t mask3 = ((const uint32_t *) table)[4]; | |
uint32_t index3 = wc & mask3; | |
uint32_t lookup3 = ((const uint32_t *)(table + lookup2))[index3]; | |
return lookup3; | |
} | |
} | |
} | |
return ~((uint32_t) 0); | |
} |