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/* inmemory_alltermslist.cc
*
* Copyright 1999,2000,2001 BrightStation PLC
* Copyright 2003,2004,2007,2008,2009 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 "inmemory_alltermslist.h"
#include "stringutils.h"
string
InMemoryAllTermsList::get_termname() const
{
if (database->is_closed()) InMemoryDatabase::throw_database_closed();
Assert(!at_end());
Assert(!it->first.empty());
return it->first;
}
Xapian::doccount
InMemoryAllTermsList::get_termfreq() const
{
if (database->is_closed()) InMemoryDatabase::throw_database_closed();
Assert(!at_end());
Assert(!it->first.empty());
/* FIXME: this isn't quite right. */
return it->second.docs.size();
}
Xapian::termcount
InMemoryAllTermsList::get_collection_freq() const
{
if (database->is_closed()) InMemoryDatabase::throw_database_closed();
Assert(!at_end());
Assert(!it->first.empty());
throw Xapian::UnimplementedError("Collection frequency not implemented in InMemory backend");
}
TermList *
InMemoryAllTermsList::skip_to(const string &tname_)
{
if (database->is_closed()) InMemoryDatabase::throw_database_closed();
string tname(tname_);
Assert(it != tmap->end());
if (!it->first.empty()) {
// Don't skip backwards.
if (tname <= it->first) return NULL;
} else {
// Don't skip to before where we're supposed to start.
if (tname < prefix) {
tname = prefix;
} else if (tname.empty()) {
++it;
return NULL;
}
}
it = tmap->lower_bound(tname);
while (it != tmap->end() && it->second.term_freq == 0) ++it;
if (it != tmap->end() && !startswith(it->first, prefix))
it = tmap->end();
return NULL;
}
TermList *
InMemoryAllTermsList::next()
{
if (database->is_closed()) InMemoryDatabase::throw_database_closed();
Assert(it != tmap->end());
if (it->first.empty() && !prefix.empty()) {
it = tmap->lower_bound(prefix);
} else {
++it;
}
while (it != tmap->end() && it->second.term_freq == 0) ++it;
if (it != tmap->end() && !startswith(it->first, prefix))
it = tmap->end();
return NULL;
}
bool
InMemoryAllTermsList::at_end() const
{
if (database->is_closed()) InMemoryDatabase::throw_database_closed();
Assert(it == tmap->end() || !it->first.empty());
return (it == tmap->end());
}
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