api/termlist.cc

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/* Copyright (C) 2007 Olly Betts
 *
 * 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
 */

#include <config.h>

#include "omassert.h"

#include "termlist.h"

using namespace std;

namespace Xapian {

TermIterator::Internal::~Internal() { }

void
TermIterator::Internal::accumulate_stats(Xapian::Internal::ExpandStats &) const
{
    // accumulate_stats should never get called for some subclasses.
    Assert(false);
}

Xapian::termcount
TermIterator::Internal::get_collection_freq() const
{
    // This method isn't currently externally exposed (or used internally).
    Assert(false);
    return 0;
}

TermIterator::Internal *
TermIterator::Internal::skip_to(const string & term)
{
    // This simple implementation just calls next until we're at or past the
    // specified term.  Subclasses can override with a more efficient
    // implementation if they are able to provide one.
    while (!at_end() && get_termname() < term) {
        Internal *tl = next();
        if (tl) {
            while (!tl->at_end() && tl->get_termname() < term) {
                Internal *ret = tl->next();
                if (ret) {
                    delete tl;
                    tl = ret;
                }
            }
            return tl;
        }
    }

    return NULL;
}

}

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