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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* Written by Sergei A. Golubchik, who has a shared copyright to this code */
#include "ftdefs.h"
/* queries myisam and returns list of documents matched */
static int FT_DOC_cmp(FT_DOC *a, FT_DOC *b)
{
return sgn(b->weight - a->weight);
}
FT_DOCLIST *ft_init_search(void *info, uint keynr, byte *query,
uint query_len, my_bool presort)
{
FT_DOCLIST *dlist;
my_off_t saved_lastpos=((MI_INFO *)info)->lastpos;
/* black magic ON */
if ((int) (keynr = _mi_check_index((MI_INFO *)info,keynr)) < 0)
return NULL;
if (_mi_readinfo((MI_INFO *)info,F_RDLCK,1))
return NULL;
/* black magic OFF */
if (is_boolean(query, query_len))
dlist=ft_boolean_search(info,keynr,query,query_len);
else
dlist=ft_nlq_search(info,keynr,query,query_len);
if(dlist && presort)
{
qsort(dlist->doc, dlist->ndocs, sizeof(FT_DOC), (qsort_cmp)&FT_DOC_cmp);
}
((MI_INFO *)info)->lastpos=saved_lastpos;
return dlist;
}
int ft_read_next(FT_DOCLIST *handler, char *record)
{
MI_INFO *info= (MI_INFO *) handler->info;
if (++handler->curdoc >= handler->ndocs)
{
--handler->curdoc;
return HA_ERR_END_OF_FILE;
}
info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
info->lastpos=handler->doc[handler->curdoc].dpos;
if (!(*info->read_record)(info,info->lastpos,record))
{
info->update|= HA_STATE_AKTIV; /* Record is read */
return 0;
}
return my_errno;
}
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