/*----------------------------------------------------------------------*\
 | Structure and function definitions for Desert Winds I/O routines		|
 |																		|
 | Peter N. Schweitzer (U.S. Geological Survey, Reston, VA 22092)		|
\*----------------------------------------------------------------------*/

#ifndef DW_H
#define DW_H	1

#define MISSING_VALUE	-99

struct dms {
	short degrees;
	short minutes;
	short seconds;
	};

struct location {
	struct dms latitude;
	struct dms longitude;
	};

struct dwd {
	unsigned short year;
	unsigned short day;
	unsigned short hour;
	unsigned short minute;
	float hum;			/* Humidity					*/
	float ppt;			/* Precipitation			*/
	float bp;			/* Barometric Pressure		*/
	float wd;			/* Wind Direction			*/
	float ws20;			/* Wind Speed at 20ft		*/
	float pg20;			/* Peak Gust at 20ft		*/
	float ws88;			/* Wind Speed at 8.8ft		*/
	float ws4;			/* Wind Speed at 4ft		*/
	float pg4;			/* Peak Gust at 4ft			*/
	float at20;			/* Air  Temperature at 20ft	*/
	float at4;			/* Air  Temperature at 4ft	*/
	float st4;			/* Soil Temperature at 4cm	*/
	float st10;			/* Soil Temperature at 10cm	*/
	float st20;			/* Soil Temperature at 20cm	*/
	float srsi;			/* Solar Radiation (short wavelength, incoming)	*/
	float srli;			/* Solar Radiation (long  wavelength, incoming)	*/
	float srso;			/* Solar Radiation (short wavelength, outgoing)	*/
	float srlo;			/* Solar Radiation (long  wavelength, outgoing)	*/
	float sb;			/* Shadow Band						*/
	float bt1;			/* Brightness Temperature, band 1	*/
	float bt2;			/* Brightness Temperature, band 2	*/
	float bt3;			/* Brightness Temperature, band 3	*/
	float bt4;			/* Brightness Temperature, band 4	*/
	};

struct dw_file {
	struct dw_file *prev;
	struct dw_file *next;
	char name [FILENAME_MAX];
	FILE *f;
	char binary;
	char version;
	short must_swap_bytes;
	struct location where;
	struct dwd *(*read)(struct dw_file *dwf, struct dwd *d);
	int (*write)(struct dw_file *dwf, struct dwd *d);
	};

extern struct dw_file *dw_open (char *name, char *mode, struct location *where);
extern struct dwd *dw_read (struct dw_file *f, struct dwd *d);
extern int dw_write (struct dw_file *f, struct dwd *d);
extern void dw_close (struct dw_file *f);

#endif

/*----------------------------------------------------------------------*\
\*----------------------------------------------------------------------*/