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/*  xbfilter.h

    Xbase project source code
  
    This file conatains a header file for the xbFilter object which
    is used for filtering data.

    Copyright (C) 1997  Startech, Gary A. Kunkel   
    email - xbase@startech.keller.tx.us
    www   - http://www.startech.keller.tx.us/xbase.html

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

    V 1.0   10/10/97   - Initial release of software
    V 1.5   1/2/97     - Added memo field support
    V 1.6a  4/1/98     - Added expression support
    V 1.6b  4/8/98     - Numeric index keys 
*/

#ifndef __XB_FILTER_H__
#define __XB_FILTER_H__


class XBDLLEXPORT xbFilter {
  public:
   xbFilter( xbDbf * dbf, xbIndex * index, char * expression );
   xbShort GetFirstFilterRec();
   xbShort GetLastFilterRec();
   xbShort GetNextFilterRec();
   xbShort GetPrevFilterRec();
  private:
   xbULong CurFilterRecNo;
   xbShort Status;
   xbExpNode *e;
   xbDbf *d;
   xbIndex *i;
};

#endif