Back to index

glibc  2.9
elem-hash.h
Go to the documentation of this file.
00001 /* Copyright (C) 1999, 2001 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Written by Ulrich Drepper, <drepper@cygnus.com>.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 
00021 /* The hashing function used for the table with collation symbols.  */
00022 static inline int32_t
00023 elem_hash (const char *str, int_fast32_t n)
00024 {
00025   int32_t result = n;
00026 
00027   while (n-- > 0)
00028     {
00029       result <<= 3;
00030       result += *str++;
00031     }
00032 
00033   return result;
00034 }