You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
205 lines
7.9 KiB
205 lines
7.9 KiB
/* vim: set sw=8: -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
|
|
/* enchant
|
|
* Copyright (C) 2003 Dom Lachowicz
|
|
*
|
|
* This 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.
|
|
*
|
|
* 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*
|
|
* In addition, as a special exception, Dom Lachowicz
|
|
* gives permission to link the code of this program with
|
|
* non-LGPL Spelling Provider libraries (eg: a MSFT Office
|
|
* spell checker backend) and distribute linked combinations including
|
|
* the two. You must obey the GNU Lesser General Public License in all
|
|
* respects for all of the code used other than said providers. If you modify
|
|
* this file, you may extend this exception to your version of the
|
|
* file, but you are not obligated to do so. If you do not wish to
|
|
* do so, delete this exception statement from your version.
|
|
*/
|
|
|
|
/*
|
|
* hash.c - a simple hash function for ispell
|
|
*
|
|
* Pace Willisson, 1983
|
|
*
|
|
* Copyright 1992, 1993, Geoff Kuenning, Granada Hills, CA
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All modifications to the source code must be clearly marked as
|
|
* such. Binary redistributions based on modified source code
|
|
* must be clearly marked as modified versions in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
* 4. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgment:
|
|
* This product includes software developed by Geoff Kuenning and
|
|
* other unpaid contributors.
|
|
* 5. The name of Geoff Kuenning may not be used to endorse or promote
|
|
* products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY GEOFF KUENNING AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL GEOFF KUENNING OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* $Log$
|
|
* Revision 1.1 2004/01/31 16:44:12 zrusin
|
|
* ISpell plugin.
|
|
*
|
|
* Revision 1.4 2003/08/14 17:51:27 dom
|
|
* update license - exception clause should be Lesser GPL
|
|
*
|
|
* Revision 1.3 2003/07/28 20:40:26 dom
|
|
* fix up the license clause, further win32-registry proof some directory getting functions
|
|
*
|
|
* Revision 1.2 2003/07/16 22:52:39 dom
|
|
* LGPL + exception license
|
|
*
|
|
* Revision 1.1 2003/07/15 01:15:05 dom
|
|
* ispell enchant backend
|
|
*
|
|
* Revision 1.2 2003/01/29 05:50:11 hippietrail
|
|
*
|
|
* Fixed my mess in EncodingManager.
|
|
* Changed many C casts to C++ casts.
|
|
*
|
|
* Revision 1.1 2003/01/24 05:52:33 hippietrail
|
|
*
|
|
* Refactored ispell code. Old ispell global variables had been put into
|
|
* an allocated structure, a pointer to which was passed to many functions.
|
|
* I have now made all such functions and variables private members of the
|
|
* ISpellChecker class. It was C OO, now it's C++ OO.
|
|
*
|
|
* I've fixed the makefiles and tested compilation but am unable to test
|
|
* operation. Please back out my changes if they cause problems which
|
|
* are not obvious or easy to fix.
|
|
*
|
|
* Revision 1.5 2002/09/19 05:31:15 hippietrail
|
|
*
|
|
* More Ispell cleanup. Conditional globals and DEREF macros are removed.
|
|
* K&R function declarations removed, converted to Doxygen style comments
|
|
* where possible. No code has been changed (I hope). Compiles for me but
|
|
* unable to test.
|
|
*
|
|
* Revision 1.4 2002/09/17 03:03:29 hippietrail
|
|
*
|
|
* After seeking permission on the developer list I've reformatted all the
|
|
* spelling source which seemed to have parts which used 2, 3, 4, and 8
|
|
* spaces for tabs. It should all look good with our standard 4-space
|
|
* tabs now.
|
|
* I've concentrated just on indentation in the actual code. More prettying
|
|
* could be done.
|
|
* * NO code changes were made *
|
|
*
|
|
* Revision 1.3 2002/09/13 17:20:13 mpritchett
|
|
* Fix more warnings for Linux build
|
|
*
|
|
* Revision 1.2 2001/05/12 16:05:42 thomasf
|
|
* Big pseudo changes to ispell to make it pass around a structure rather
|
|
* than rely on all sorts of gloabals willy nilly here and there. Also
|
|
* fixed our spelling class to work with accepting suggestions once more.
|
|
* This code is dirty, gross and ugly (not to mention still not supporting
|
|
* multiple hash sized just yet) but it works on my machine and will no
|
|
* doubt break other machines.
|
|
*
|
|
* Revision 1.1 2001/04/15 16:01:24 tomas_f
|
|
* moving to spell/xp
|
|
*
|
|
* Revision 1.3 1998/12/29 14:55:33 eric
|
|
*
|
|
* I've doctored the ispell code pretty extensively here. It is now
|
|
* warning-free on Win32. It also *works* on Win32 now, since I
|
|
* replaced all the I/O calls with ANSI standard ones.
|
|
*
|
|
* Revision 1.2 1998/12/28 23:11:30 eric
|
|
*
|
|
* modified spell code and integration to build on Windows.
|
|
* This is still a hack.
|
|
*
|
|
* Actually, it doesn't yet WORK on Windows. It just builds.
|
|
* SpellCheckInit is failing for some reason.
|
|
*
|
|
* Revision 1.1 1998/12/28 18:04:43 davet
|
|
* Spell checker code stripped from ispell. At this point, there are
|
|
* two external routines... the Init routine, and a check-a-word routine
|
|
* which returns a boolean value, and takes a 16 bit char string.
|
|
* The code resembles the ispell code as much as possible still.
|
|
*
|
|
* Revision 1.20 1994/01/25 07:11:34 geoff
|
|
* Get rid of all old RCS log lines in preparation for the 3.1 release.
|
|
*
|
|
*/
|
|
|
|
#include "ispell_checker.h"
|
|
|
|
/*
|
|
* The following hash algorithm is due to Ian Dall, with slight modifications
|
|
* by Geoff Kuenning to reflect the results of testing with the English
|
|
* dictionaries actually distributed with ispell.
|
|
*/
|
|
#define HASHSHIFT 5
|
|
|
|
#ifdef NO_CAPITALIZATION_SUPPORT
|
|
#define HASHUPPER(c) c
|
|
#else /* NO_CAPITALIZATION_SUPPORT */
|
|
#define HASHUPPER(c) mytoupper(c)
|
|
#endif /* NO_CAPITALIZATION_SUPPORT */
|
|
|
|
/*
|
|
* \param s
|
|
* \param hashtblsize
|
|
*/
|
|
int ISpellChecker::hash (ichar_t *s, int hashtblsize)
|
|
{
|
|
register long h = 0;
|
|
register int i;
|
|
|
|
#ifdef ICHAR_IS_CHAR
|
|
for (i = 4; i-- && *s != 0; )
|
|
h = (h << 8) | HASHUPPER (*s++);
|
|
#else /* ICHAR_IS_CHAR */
|
|
for (i = 2; i-- && *s != 0; )
|
|
h = (h << 16) | HASHUPPER (*s++);
|
|
#endif /* ICHAR_IS_CHAR */
|
|
while (*s != 0)
|
|
{
|
|
/*
|
|
* We have to do circular shifts the hard way, since C doesn't
|
|
* have them even though the hardware probably does. Oh, well.
|
|
*/
|
|
h = (h << HASHSHIFT)
|
|
| ((h >> (32 - HASHSHIFT)) & ((1 << HASHSHIFT) - 1));
|
|
h ^= HASHUPPER (*s++);
|
|
}
|
|
return static_cast<unsigned long>(h) % hashtblsize;
|
|
}
|