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/* chert_record.cc: Records in chert databases
*
* Copyright 2002 Ananova Ltd
* Copyright 2002,2003,2004,2005,2008 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 "chert_record.h"
#include <xapian/error.h>
#include "debuglog.h"
#include "omassert.h"
#include "pack.h"
#include "str.h"
using std::string;
inline string
make_key(Xapian::docid did)
{
string key;
C_pack_uint_preserving_sort(key, did);
return key;
}
string
ChertRecordTable::get_record(Xapian::docid did) const
{
LOGCALL(DB, string, "ChertRecordTable::get_record", did);
string tag;
// get_document() checks that the docid is valid, unless DOC_ASSUME_VALID
// is used in which case returning an empty string here is the most
// sensible behaviour.
(void)get_exact_entry(make_key(did), tag);
RETURN(tag);
}
Xapian::doccount
ChertRecordTable::get_doccount() const
{
LOGCALL(DB, Xapian::doccount, "ChertRecordTable::get_doccount", NO_ARGS);
chert_tablesize_t count = get_entry_count();
if (rare(count > chert_tablesize_t(Xapian::doccount(-1)))) {
// If we've got more entries than there are possible docids, the
// database is in an odd state.
throw Xapian::DatabaseCorruptError("Impossibly many entries in the record table");
}
RETURN(Xapian::doccount(count));
}
void
ChertRecordTable::replace_record(const string & data, Xapian::docid did)
{
LOGCALL_VOID(DB, "ChertRecordTable::replace_record", data | did);
add(make_key(did), data);
}
void
ChertRecordTable::delete_record(Xapian::docid did)
{
LOGCALL_VOID(DB, "ChertRecordTable::delete_record", did);
if (!del(make_key(did)))
throw Xapian::DocNotFoundError("Can't delete non-existent document #" + str(did));
}
void
ChertRecordTable::readahead_for_record(Xapian::docid did) const
{
readahead_key(make_key(did));
}
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