banditerator.hh

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/*
* This file is part of rasdaman community.
*
* Rasdaman community 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 3 of the License, or
* (at your option) any later version.
*
* Rasdaman community 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 rasdaman community.  If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
rasdaman GmbH.
*
* For more information please see <http://www.rasdaman.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
*/
 
#ifndef _BAND_ITERATOR_
#define _BAND_ITERATOR_
 
#include "raslib/mddtypes.hh"
#include <assert.h>
 
class r_Base_Type;
 
//@ManMemo: Module: {\bf raslib}
 
class r_Band_Iterator
{
public:
    r_Band_Iterator(const char *_data, const r_Base_Type *_type, r_Bytes _size,
                    unsigned int _band, r_Band_Linearization _bandLinearization);
 
    virtual ~r_Band_Iterator() = default;
 
    bool done() const
    {
        return currCell == dataEnd;
    }
 
    void advance()
    {
        assert(currCell != dataEnd);
        currCell += cellSize;
    }
 
    void advance(r_Bytes cellCount)
    {
        assert(currCell + (cellSize * cellCount) <= dataEnd);
        currCell += (cellSize * cellCount);
    }
 
    const char *get()
    {
        assert(currCell != dataEnd);
        return currCell;
    }
 
    const char *get(r_Bytes targetCell)
    {
        assert(targetCell < size);
        return (data + bandOffset) + (targetCell * cellSize);
    }
 
    void reset()
    {
        currCell = data + bandOffset;
    }
 
    void copyBand(char *__restrict__ dst);
 
    r_Bytes getBandSize() const;
 
protected:
    const char *data{NULL};
 
    const char *currCell{NULL};
 
    const char *dataEnd{NULL};
 
    const r_Base_Type *type{NULL};
 
    r_Bytes size{};
 
    r_Bytes bandOffset{};
 
    unsigned int band{};
 
    unsigned int cellBandSize{};
 
    unsigned int cellSize{1};
 
    r_Band_Linearization bandLinearization{r_Band_Linearization::PixelInterleaved};
};
 
#endif