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       1                 :            : /* msetcmp.h - MSetItem comparison functions and functors.
       2                 :            :  *
       3                 :            :  * Copyright (C) 2006,2007 Olly Betts
       4                 :            :  *
       5                 :            :  * This program is free software; you can redistribute it and/or
       6                 :            :  * modify it under the terms of the GNU General Public License as
       7                 :            :  * published by the Free Software Foundation; either version 2 of the
       8                 :            :  * License, or (at your option) any later version.
       9                 :            :  *
      10                 :            :  * This program is distributed in the hope that it will be useful,
      11                 :            :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      12                 :            :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      13                 :            :  * GNU General Public License for more details.
      14                 :            :  *
      15                 :            :  * You should have received a copy of the GNU General Public License
      16                 :            :  * along with this program; if not, write to the Free Software
      17                 :            :  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
      18                 :            :  * USA
      19                 :            :  */
      20                 :            : 
      21                 :            : 
      22                 :            : #ifndef XAPIAN_INCLUDED_MSETCMP_H
      23                 :            : #define XAPIAN_INCLUDED_MSETCMP_H
      24                 :            : 
      25                 :            : #include "omenquireinternal.h"
      26                 :            : 
      27                 :            : // typedef for MSetItem comparison function.
      28                 :            : typedef bool (* mset_cmp)(const Xapian::Internal::MSetItem &,
      29                 :            :                           const Xapian::Internal::MSetItem &);
      30                 :            : 
      31                 :            : /// Select the appropriate msetcmp function.
      32                 :            : mset_cmp get_msetcmp_function(Xapian::Enquire::Internal::sort_setting sort_by, bool sort_forward, bool sort_value_forward);
      33                 :            : 
      34                 :            : /// MSetItem comparison functor.
      35                 :            : class MSetCmp {
      36                 :            :     mset_cmp fn;
      37                 :            :   public:
      38                 :     173480 :     MSetCmp(mset_cmp fn_) : fn(fn_) { }
      39                 :            :     /// Return true if MSetItem a should be ranked above MSetItem b.
      40                 :  427109334 :     bool operator()(const Xapian::Internal::MSetItem &a,
      41                 :            :                     const Xapian::Internal::MSetItem &b) const {
      42                 :  427109334 :         return fn(a, b);
      43                 :            :     }
      44                 :            : };
      45                 :            : 
      46                 :            : #endif // XAPIAN_INCLUDED_MSETCMP_H