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//
// Endings.cc
//
// Endings: A fuzzy matching algorithm to match the grammatical endings rules
// used by the ispell dictionary files.
//
// Part of the ht://Dig package <http://www.htdig.org/>
// Copyright (c) 1995-2004 The ht://Dig Group
// For copyright details, see the file COPYING in your distribution
// or the GNU Library General Public License (LGPL) version 2 or later
// <http://www.gnu.org/copyleft/lgpl.html>
//
// $Id: Endings.cc,v 1.12 2004/05/28 13:15:20 lha Exp $
//
#ifdef HAVE_CONFIG_H
#include "htconfig.h"
#endif /* HAVE_CONFIG_H */
#include <fcntl.h>
#include "StringList.h"
#include "Endings.h"
#include "htfuzzy.h"
#include "HtConfiguration.h"
//*****************************************************************************
// Endings::Endings()
//
Endings::Endings(const HtConfiguration& config_arg) :
Fuzzy(config_arg)
{
root2word = 0;
word2root = 0;
name = "endings";
}
//*****************************************************************************
// Endings::~Endings()
//
Endings::~Endings()
{
if (root2word)
{
root2word->Close();
delete root2word;
root2word = 0;
}
if (word2root)
{
word2root->Close();
delete word2root;
word2root = 0;
}
}
//*****************************************************************************
// void Endings::getWords(char *word, String &words)
// Return a list of words with some common English word endings.
//
void
Endings::getWords(char *w, List &words)
{
if (!word2root || !root2word)
return;
String data;
String word = w;
word.lowercase();
HtStripPunctuation(word);
String saveword = word.get();
//
// Look for word's root(s). Some words may have more than one root,
// so handle them all. Whether or not a word has a root, it's assumed
// to be root in itself.
//
if (word2root->Get(word, data) == OK)
word << ' ' << data;
StringList roots(word, " ");
Object *root;
roots.Start_Get();
while ((root = roots.Get_Next()) != 0)
{
//
// Found a root. Look for new words that have this root.
//
word = ((String *)root)->get();
if (root2word->Get(word, data) == OK)
word << ' ' << data;
//
// Iterate through the root's permutations
//
char *token = strtok(word.get(), " ");
while (token)
{
if (mystrcasecmp(token, saveword.get()) != 0)
{
//
// This permutation isn't the original word, so we add it
// to the list if it's not already there.
//
Object *obj;
words.Start_Get();
while((obj = words.Get_Next()) != 0)
{
if (mystrcasecmp(token, ((String *)obj)->get()) == 0)
break;
}
if (obj == 0)
words.Add(new String(token));
}
token = strtok(0, " ");
}
}
}
//*****************************************************************************
// void Endings::generateKey(char *word, String &key)
// Not needed.
void
Endings::generateKey(char *, String &)
{
}
//*****************************************************************************
// void Endings::addWord(char *word)
// Not needed.
void
Endings::addWord(char *)
{
}
//*****************************************************************************
// int Endings::openIndex()
// Dummy method. Just makde sure we don't actually create a database.
//
int
Endings::openIndex()
{
String filename = config["endings_word2root_db"];
word2root = Database::getDatabaseInstance(DB_BTREE);
if (word2root->OpenRead((char*)filename) == NOTOK)
return NOTOK;
filename = config["endings_root2word_db"];
root2word = Database::getDatabaseInstance(DB_BTREE);
if (root2word->OpenRead((char*)filename) == NOTOK)
return NOTOK;
return OK;
}
//*****************************************************************************
// int Endings::writeDB()
// Dummy method. Just making sure we don't actually write anything.
//
int
Endings::writeDB()
{
return OK;
}
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