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// stemmer.cpp
/**
* Copyright (C) 2012 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <cstdlib>
#include <string>
#include "mongo/db/fts/stemmer.h"
namespace mongo {
namespace fts {
Stemmer::Stemmer( const string& language ) {
_stemmer = NULL;
if ( language != "none" )
_stemmer = sb_stemmer_new(language.c_str(), "UTF_8");
}
Stemmer::~Stemmer() {
if ( _stemmer ) {
sb_stemmer_delete(_stemmer);
_stemmer = NULL;
}
}
string Stemmer::stem( const StringData& word ) const {
if ( !_stemmer )
return word.toString();
const sb_symbol* sb_sym = sb_stemmer_stem( _stemmer,
(const sb_symbol*)word.rawData(),
word.size() );
if ( sb_sym == NULL ) {
// out of memory
abort();
}
return string( (const char*)(sb_sym), sb_stemmer_length( _stemmer ) );
}
}
}
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