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PushBackInputStream.h

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#ifndef CLASSLIB_PUSH_BACK_INPUT_STREAM_H
# define CLASSLIB_PUSH_BACK_INPUT_STREAM_H

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

# include "classlib/iotools/FilterInputStream.h"

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

class PushBackInputStream : public FilterInputStream
{
public:
    PushBackInputStream (InputStream *input);
    ~PushBackInputStream (void);

    using FilterInputStream::read;
    virtual IOSize      available (void);
    virtual IOSize      read (void *into, IOSize n);
    virtual IOSize      skip (IOSize n);
    virtual void        close (void);
    virtual void        reset (void);

    virtual void        unread (const void *data, IOSize n);
    void                unread (IOBuffer from);

private:
    unsigned char       *m_buffer;
    unsigned char       *m_bottom;
    unsigned char       *m_top;
};

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

} // namespace lat
#endif // CLASSLIB_PUSH_BACK_INPUT_STREAM_H

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