// tiff stream interface class definition

#ifndef _TIFF_STREAM_H_

#define _TIFF_STREAM_H_

#include <iostream.h>

#include "tiffio.h"

class TiffStream {

public:

    // ctor/dtor

    TiffStream();

	~TiffStream();

public:

    enum SeekDir {

	    beg,

		cur,

		end,

    };

public:

    // factory methods

    TIFF* makeFileStream(iostream* str);

	TIFF* makeFileStream(istream* str);

	TIFF* makeFileStream(ostream* str);

public:

    // tiff client methods

	static tsize_t read(thandle_t fd, tdata_t buf, tsize_t size);

	static tsize_t write(thandle_t fd, tdata_t buf, tsize_t size);

	static toff_t seek(thandle_t fd, toff_t offset, int origin);

	static toff_t size(thandle_t fd);

	static int close(thandle_t fd);

	static int map(thandle_t fd, tdata_t* phase, toff_t* psize);

	static void unmap(thandle_t fd, tdata_t base, tsize_t size);

public:

    // query method

	TIFF* getTiffHandle() const { return m_tif; }

	unsigned int getStreamLength() { return m_streamLength; }

private:

	// internal methods

    unsigned int getSize(thandle_t fd);

	unsigned int tell(thandle_t fd);

	bool seekInt(thandle_t fd, unsigned int offset, int origin);

	bool isOpen(thandle_t fd);

private:

	thandle_t m_this;

	TIFF* m_tif;

	static const char* m_name;

	istream* m_inStream;

	ostream* m_outStream;

	iostream* m_ioStream;

	int m_streamLength;

};

#endif // _TIFF_STREAM_H_

/*

 * Local Variables:

 * mode: c++

 * c-basic-offset: 8

 * fill-column: 78

 * End:

 */