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[thirdparty/glibc.git] / locale / elem-hash.h

/* Copyright (C) 1999-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Ulrich Drepper, <drepper@cygnus.com>.

   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
   <https://www.gnu.org/licenses/>.  */


/* The hashing function used for the table with collation symbols.  */
static int32_t __attribute__ ((pure, unused))
elem_hash (const char *str, int_fast32_t n)
{
  int32_t result = n;

  while (n-- > 0)
    {
      result <<= 3;
      result += *str++;
    }

  return result;
}