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MemoryStorage.h

Go to the documentation of this file.

#ifndef CLASSLIB_MEMORY_STORAGE_H
# define CLASSLIB_MEMORY_STORAGE_H

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

# include "classlib/sysapi/system.h"
# include "classlib/iobase/Storage.h"

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

class MemoryStorage : public Storage
{
public:
    MemoryStorage (IOBuffer data = IOBuffer ((void *) 0, 0));
    MemoryStorage (const void *data, IOSize n);
    ~MemoryStorage (void);

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

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

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

    virtual IOBuffer    data (void) const;

protected:
    virtual void        extend (IOSize by);

    unsigned char       *m_buffer;      //< Buffer base pointer.
    unsigned char       *m_current;     //< Current "file position".
    unsigned char       *m_top;         //< High mark of anything written.
    unsigned char       *m_limit;       //< Top of allocated buffer extent.
    bool                m_growable;     //< Flag indicating whether buffer can grow.
};

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

} // namespace lat
#endif // CLASSLIB_MEMORY_STORAGE_H

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