databuf.h

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#pragma once

/*
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        A.H.Bril
 Date:          1-9-95
________________________________________________________________________

*/

#include "generalmod.h"
#include "bufstring.h"


mExpClass(General) DataBuffer
{
public:

    typedef int         size_type;
    typedef int         obj_size_type;
    typedef unsigned char buf_type;

                        DataBuffer(size_type nrelem,int bytsperelem=4,
                                      bool setnull=false);
                        ~DataBuffer();
                        DataBuffer( const DataBuffer& b )
                        : nelem_(0), data_(0)   { *this = b; }
    DataBuffer&         operator=(const DataBuffer&);

    inline bool         isOk() const            { return data_ ? true : false; }
    inline bool         isEmpty() const         { return !data_ || !nelem_; }

    inline size_type    size() const            { return nelem_; }
    inline obj_size_type bytesPerElement() const { return elembytes_; }
    bool                isZero() const;
    inline od_int64     totalBytes() const
                        { return ((od_int64)nelem_)*elembytes_; }

    inline buf_type*    data()                  { return data_; }
    inline const buf_type* data() const         { return data_; }

    void                reSize(size_type,bool copydata=true);
    void                reByte(obj_size_type,bool copydata=true);
    void                zero();

    bool                fitsInString() const;
    BufferString        getString() const;

protected:

    size_type           nelem_;
    obj_size_type       elembytes_;
    buf_type*           data_;

};