fileformat/DataPointer.h

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#ifndef DATAPOINTER_H
#define DATAPOINTER_H

#include <QtCore/QByteArray>
#include <QtCore/QDebug>
#include <QtCore/QString>
class DataPointer {
QString hexByte(unsigned char start) const{
        return QString("%1").arg(start, 2, 16, QChar('0'));
}
        public:
        QByteArray data;
        int offset;

        explicit DataPointer(const QByteArray& data_, int offset_ = 0) :
                data(data_),
                offset(offset_)
        {
        }

        inline DataPointer operator+(int j) const
        {
                return DataPointer(data, offset + j);
        }

        DataPointer operator-(int j) const
        {
                return DataPointer(data, offset - j);
        }

        int operator-(const DataPointer& other) const
        {
                return offset - other.offset;
        }

        DataPointer& operator+=(int j)
        {
                offset += j;
                return *this;
        }

        inline unsigned char operator[](int j) const
        {
                return data[offset + j];
        }

        const unsigned char* toUnsignedPointer(int j = 0) const
        {
                return reinterpret_cast<const unsigned char*>(toPointer(j));
        }

        const char* toPointer(int j = 0) const
        {
                return data.data() + offset + j;
        }

        int bytesLeft() const
        {
                return data.size() - offset;
        }

        bool operator<(const DataPointer& other) {
                return offset < other.offset;
        }
        
        QByteArray toQByteArray() const;
};
#endif