known.h

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// Copyright (C) 1997-2010 by Pawel Pilarczyk.
//
// This file is part of the Homology Library.  This library 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 library 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 software; see the file "license.txt".  If not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
// MA 02111-1307, USA.

// Started in January 2002. Last revision: June 2, 2007.


#ifndef _CHOMP_HOMOLOGY_KNOWN_H_
#define _CHOMP_HOMOLOGY_KNOWN_H_

#include "chomp/system/config.h"
#include "chomp/system/textfile.h"
#include "chomp/struct/bitfield.h"

namespace chomp {
namespace homology {


// --------------------------------------------------
// ------------------- BitFields --------------------
// --------------------------------------------------

class BitFields
{
public:
        BitFields ();

        ~BitFields ();

        void setkblimit (int limit = -1, int dim = -1);

        int getkblimit (int dim = 0) const;

        SetOfBitFields *operator [] (int dim);

        void forget (int dim = -1);

private:
        SetOfBitFields **tab;

        int len;

        int *maxkb;

        void extend (int n);

        void allocate (int dim);

}; /* class BitFields */

// --------------------------------------------------

inline BitFields::BitFields ()
{
        tab = NULL;
        len = 0;
        maxkb = NULL;
        return;
} /* BitFields::BitFields */

inline SetOfBitFields *BitFields::operator [] (int dim)
{
        // make sure the dimension is positive
        if (dim <= 0)
                throw "Trying to get a bit field set of non-positive dim.";

        // extend the tables if necessary
        if (dim >= len)
                extend (dim + 1);

        // allocate the bit field set if necessary
        if (!tab [dim] && maxkb [dim])
                allocate (dim);

        // return the pointer to the requested bit field set
        return tab [dim];
} /* BitFields::operator [] */

// --------------------------------------------------

extern BitFields knownbits;


} // namespace homology
} // namespace chomp

#endif // _CHOMP_HOMOLOGY_KNOWN_H_