81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
/* Copyright (C) 2000-2017 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);
|
|
}
|