eliot/dic/hashtable.cpp
Olivier Teulière e7a8d01a8d Merged the "cppdic" branch back into HEAD.
There are too many change to list properly, here is an overview of the main changes:
 - the dictionary is now in C++
 - the dictionary has a new format, where it is possible to specify the letters,
   their points, their frequency, ... It is backwards compatible.
 - Eliot now supports non-ASCII characters everywhere
 - i18n of the compdic, listdic, regexpmain binaries
 - i18n of the wxWidgets interface (now in english by default)
2008-01-08 13:52:32 +00:00

52 lines
1.8 KiB
C++

/*****************************************************************************
* Eliot
* Copyright (C) 1999-2007 Antoine Fraboulet & Olivier Teulière
* Authors: Antoine Fraboulet <antoine.fraboulet @@ free.fr>
* Olivier Teulière <ipkiss @@ gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*****************************************************************************/
/**
* \file hashtable.c
* \brief Simple hashtable type
* \author Antoine Fraboulet
* \date 1999
*/
#include "hashtable.h"
unsigned int HashPtr(const void *iPtr, unsigned int iSize)
{
unsigned int key = 0;
if (iSize % sizeof(unsigned int) == 0)
{
const unsigned int *ptr =
reinterpret_cast<const unsigned int*>(iPtr);
for (unsigned int i = 0; i < (iSize / sizeof(unsigned int)); ++i)
key ^= (key << 3) ^ (key >> 1) ^ ptr[i];
}
else
{
const unsigned char *ptr =
reinterpret_cast<const unsigned char*>(iPtr);
for (unsigned int i = 0; i < iSize; ++i)
key ^= (key << 3) ^ (key >> 1) ^ ptr[i];
}
return key;
}