/* 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) { long h = 0; 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(h) % hashtblsize; }