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#ifndef __PGS_GIST_H__
#define __PGS_GIST_H__
#include "key.h"
/*
* GIST index declarations
*/
/* An alias for unsigned char */
typedef unsigned char uchar;
/* PGS_KEY_REL Key relationships */
#define SCKEY_DISJ 0 /* two keys are disjunct */
#define SCKEY_OVERLAP 1 /* two keys are overlapping */
#define SCKEY_IN 2 /* first key contains second key */
#define SCKEY_SAME 3 /* keys are equal */
uchar spherekey_interleave(const int32 *k1, const int32 *k2);
/*
* For given "query" of "pgstype" of PGS_DATA_TYPES type, puts key of cached
* query into "key" pointer. Returns true when given query is equal to
* current query.
*/
bool gq_cache_get_value(unsigned pgstype, const void *query, int32 **key);
/*
* Copy current query, type and its key value to cache.
*/
void gq_cache_set_value(unsigned pgstype, const void *query, const int32 *key);
/*
* Input function of key value. Just a dummy. But PostgreSQL need this
* function to create a data type.
*/
Datum spherekey_in(PG_FUNCTION_ARGS);
/*
* Output function of key value. Just a dummy. But PostgreSQL need this
* function to create a data type.
*/
Datum spherekey_out(PG_FUNCTION_ARGS);
/*
* GIST's decompress method. This function does nothing.
*/
Datum g_spherekey_decompress(PG_FUNCTION_ARGS);
/*
* GIST's compress method for circle. Creates the key value from a spherical
* circle.
*/
Datum g_scircle_compress(PG_FUNCTION_ARGS);
/*
* GIST's compress method for point. Creates the key value from a spherical point.
*/
Datum g_spoint_compress(PG_FUNCTION_ARGS);
/*
* GIST's compress method for line. Creates the key value from a spherical line.
*/
Datum g_sline_compress(PG_FUNCTION_ARGS);
/*
* GIST's compress method for path. Creates the key value from a spherical path.
*/
Datum g_spath_compress(PG_FUNCTION_ARGS);
/*
* GIST's compress method for polygon. Creates the key value from a spherical
* polygon.
*/
Datum g_spoly_compress(PG_FUNCTION_ARGS);
/*
* GIST's compress method for ellipse. Creates the key value from a spherical
* ellipse.
*/
Datum g_sellipse_compress(PG_FUNCTION_ARGS);
/*
* GIST's compress method for box. Creates the key value from a spherical box.
*/
Datum g_sbox_compress(PG_FUNCTION_ARGS);
/*
* The GiST Union method for boxes. Returns the minimal bounding box that
* encloses all the entries in entryvec.
*/
Datum g_spherekey_union(PG_FUNCTION_ARGS);
/*
* GIST's equality method.
*/
Datum g_spherekey_same(PG_FUNCTION_ARGS);
/*
* GIST's consistent method for a point.
*/
Datum g_spoint_consistent(PG_FUNCTION_ARGS);
/*
* GIST's consistent method for a circle.
*/
Datum g_scircle_consistent(PG_FUNCTION_ARGS);
/*
* GIST's consistent method for a line.
*/
Datum g_sline_consistent(PG_FUNCTION_ARGS);
/*
* GIST's consistent method for a path.
*/
Datum g_spath_consistent(PG_FUNCTION_ARGS);
/*
* GIST's consistent method for a polygon.
*/
Datum g_spoly_consistent(PG_FUNCTION_ARGS);
/*
* GIST's consistent method for an ellipse.
*/
Datum g_sellipse_consistent(PG_FUNCTION_ARGS);
/*
* GIST's consistent method for a box.
*/
Datum g_sbox_consistent(PG_FUNCTION_ARGS);
/*
* GIST's penalty method.
*/
Datum g_spherekey_penalty(PG_FUNCTION_ARGS);
/*
* GIST's picksplit method. This method is using the double sorting node
* splitting algorithm for R-Trees. See "A new double sorting-based node
* splitting algorithm for R-tree", A. Korotkov.
*/
Datum g_spherekey_picksplit(PG_FUNCTION_ARGS);
Datum pointkey_in(PG_FUNCTION_ARGS);
Datum pointkey_out(PG_FUNCTION_ARGS);
Datum pointkey_volume(PG_FUNCTION_ARGS);
Datum pointkey_area(PG_FUNCTION_ARGS);
Datum pointkey_perimeter(PG_FUNCTION_ARGS);
#endif
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