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SubStorage.h

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#ifndef CLASSLIB_SUB_STORAGE_H
# define CLASSLIB_SUB_STORAGE_H

//<<<<<< INCLUDES                                                       >>>>>>

# include "classlib/sysapi/system.h"
# include "classlib/iobase/Storage.h"
# include <string>
# include <cstdio>

namespace lat {
//<<<<<< PUBLIC DEFINES                                                 >>>>>>
//<<<<<< PUBLIC CONSTANTS                                               >>>>>>
//<<<<<< PUBLIC TYPES                                                   >>>>>>
//<<<<<< PUBLIC VARIABLES                                               >>>>>>
//<<<<<< PUBLIC FUNCTIONS                                               >>>>>>
//<<<<<< CLASS DECLARATIONS                                             >>>>>>

class SubStorage : public Storage
{
public:
    // FIXME: bool expandable?
    SubStorage (Storage *base, IOOffset from, IOOffset len);
    ~SubStorage (void);

    using Storage::read;
    using Storage::write;

    virtual IOSize      read (void *into, IOSize n);
    virtual IOSize      write (const void *from, IOSize n);

    virtual IOOffset    position (void) const;
    virtual IOOffset    position (IOOffset offset, Relative whence = SET);
    virtual void        rewind (void);

    virtual void        resize (IOOffset size);

    virtual void        flush (void);
    virtual void        close (void);

protected:
    Storage             *m_base;
    IOOffset            m_bias;
    IOOffset            m_length;
    IOOffset            m_position;
};

//<<<<<< INLINE PUBLIC FUNCTIONS                                        >>>>>>
//<<<<<< INLINE MEMBER FUNCTIONS                                        >>>>>>

} // namespace lat
#endif // CLASSLIB_SUB_STORAGE_H

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