xapian-core/api/expanddecider.cc

   1 /** @file expanddecider.cc
   2  * @brief Allow rejection of terms during ESet generation.
   3  */
   4 /* Copyright (C) 2007,2016 Olly Betts
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #include <config.h>
  22
  23 #include <xapian/expanddecider.h>
  24 #include "stringutils.h"
  25
  26 using namespace std;
  27
  28 namespace Xapian {
  29
  30 ExpandDecider::~ExpandDecider() { }
  31
  32 bool
  33 ExpandDeciderAnd::operator()(const string &term) const
  34 {
  35     return (*first)(term) && (*second)(term);
  36 }
  37
  38 bool
  39 ExpandDeciderFilterTerms::operator()(const string &term) const
  40 {
  41     /* Some older compilers (such as Sun's CC) return an iterator from find()
  42      * and a const_iterator from end() in this situation, and then can't
  43      * compare the two!  We workaround this problem by explicitly assigning the
  44      * result of find() to a const_iterator. */
  45     set<string>::const_iterator i = rejects.find(term);
  46     return i == rejects.end();
  47 }
  48
  49 bool
  50 ExpandDeciderFilterPrefix::operator()(const string &term) const
  51 {
  52     return startswith(term, prefix);
  53 }
  54
  55 }