/* 
Copyright (C) 1990 Free Software Foundation
    written by Doug Lea (dl@rocky.oswego.edu)

This file is part of the GNU C++ Library.  This library is free
software; you can redistribute it and/or modify it under the terms of
the GNU Library General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your
option) any later version.  This 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#include <hash.h>

/*
 some useful hash functions
*/

unsigned int hashpjw (const char* x) // From Dragon book, p436
{
  unsigned int h = 0;
  unsigned int g;

  while (*x != 0)
  {
    h = (h << 4) + (unsigned char) *x++;
    if ((g = h & 0xf0000000) != 0)
      h = (h ^ (g >> 24)) ^ g;
  }
  return h;
}