#include <grass/vector.h>
#include <grass/dbmi.h>

/* define codes for characteristics of relation between two nearest features */
#define CAT        1		/* category of nearest feature */
#define FROM_X     2		/* x coordinate of nearest point on 'from' feature */
#define FROM_Y     3		/* y coordinate of nearest point on 'from' feature */
#define TO_X       4		/* x coordinate of nearest point on 'to' feature */
#define TO_Y       5		/* y coordinate of nearest point on 'to' feature */
#define FROM_ALONG 6		/* distance to nearest point on 'from' along linear feature */
#define TO_ALONG   7		/* distance to nearest point on 'to' along linear feature */
#define DIST       8		/* minimum distance to nearest feature */
#define TO_ANGLE   9		/* angle of linear feature in nearest point */
#define TO_ATTR   10		/* attribute of nearest feature */
#define END       11		/* end of list */

/* Structure to store info about nearest feature for each category */
typedef struct
{
    int from_cat;		/* category (from) */
    int count;			/* number of features already found */
    int to_cat;			/* category (to) */
    double from_x, from_y, from_z; /* coordinates of nearest 'from' point */
    double to_x, to_y, to_z;	/* coordinates of nearest 'to' point */
    double from_along, to_along;	/* distance along a linear feature to the nearest point */
    double from_angle;		/* angle of linear feature in nearest point */
    double to_angle;		/* angle of linear feature in nearest point */
    double dist;		/* distance to nearest feature */
} NEAR;

/* Upload and column store */
typedef struct
{
    int upload;			/* code */
    char *column;		/* column name */
} UPLOAD;

/* cmp.c */
int cmp_near(const void *, const void *);
int cmp_near_to(const void *, const void *);
int cmp_exist(const void *, const void *);

/* distance.c */
int get_line_box(const struct line_pnts *Points, 
                 struct bound_box *box);
int line2line(struct line_pnts *FPoints, int ftype,
              struct line_pnts *TPoints, int ttype,
	      double *fx, double *fy, double *fz,
	      double *falong, double *fangle,
	      double *tx, double *ty, double *tz,
	      double *talong, double *tangle,
	      double *dist,
	      int with_z,
	      int geodesic);
int line2area(const struct Map_info *To,
	      struct line_pnts *Points, int type,
	      int area, const struct bound_box *abox,
	      double *fx, double *fy, double *fz,
	      double *falong, double *fangle,
	      double *tx, double *ty, double *tz,
	      double *talong, double *tangle,
	      double *dist,
	      int with_z,
	      int geodesic);

/* print.c */
int print_upload(NEAR *, UPLOAD *, int, dbCatValArray *, dbCatVal *);
