/* Copyright (C) 2000-2018 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

__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

__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);

}