#ifndef _LWGEOM_PG_H
#define _LWGEOM_PG_H 1

#include "postgres.h"
#include "utils/geo_decls.h"
#include "fmgr.h"
#include "liblwgeom.h"
#include "pgsql_compat.h"

#ifndef PG_NARGS
#define PG_NARGS() (fcinfo->nargs)
#endif

#if USE_VERSION < 82 
#define ARR_OVERHEAD_NONULLS(x) ARR_OVERHEAD((x))
#endif

void *pg_alloc(size_t size);
void *pg_realloc(void *ptr, size_t size);
void pg_free(void *ptr);
void pg_error(const char *msg, ...);
void pg_notice(const char *msg, ...);

/* Serialize/deserialize a PG_LWGEOM (postgis datatype) */
extern PG_LWGEOM *pglwgeom_serialize(LWGEOM *lwgeom);
extern LWGEOM *pglwgeom_deserialize(PG_LWGEOM *pglwgeom);

/* PG_LWGEOM WKB IO */
extern PG_LWGEOM *pglwgeom_from_ewkb(uchar *ewkb, size_t ewkblen);
extern char *pglwgeom_to_ewkb(PG_LWGEOM *geom, char byteorder, size_t *ewkblen);

/* PG_LWGEOM SRID get/set */
extern PG_LWGEOM *pglwgeom_setSRID(PG_LWGEOM *pglwgeom, int32 newSRID);
extern int pglwgeom_getSRID(PG_LWGEOM *pglwgeom);

extern Oid getGeometryOID(void);

/* call this as first thing of any PG function */
void init_pg_func(void);

/* PG-dependant */
/* BOX is postgresql standard type */
extern void box_to_box2df_p(BOX *box, BOX2DFLOAT4 *out);  
extern void box2df_to_box_p(BOX2DFLOAT4 *box, BOX *out);

/* PG-exposed */
Datum BOX2D_same(PG_FUNCTION_ARGS);
Datum BOX2D_overlap(PG_FUNCTION_ARGS);
Datum BOX2D_overleft(PG_FUNCTION_ARGS);
Datum BOX2D_left(PG_FUNCTION_ARGS);
Datum BOX2D_right(PG_FUNCTION_ARGS);
Datum BOX2D_overright(PG_FUNCTION_ARGS);
Datum BOX2D_overbelow(PG_FUNCTION_ARGS);
Datum BOX2D_below(PG_FUNCTION_ARGS);
Datum BOX2D_above(PG_FUNCTION_ARGS);
Datum BOX2D_overabove(PG_FUNCTION_ARGS);
Datum BOX2D_contained(PG_FUNCTION_ARGS);
Datum BOX2D_contain(PG_FUNCTION_ARGS);
Datum BOX2D_intersects(PG_FUNCTION_ARGS);
Datum BOX2D_union(PG_FUNCTION_ARGS);

Datum LWGEOM_same(PG_FUNCTION_ARGS);
Datum BOX3D_construct(PG_FUNCTION_ARGS);
Datum BOX2DFLOAT4_ymin(PG_FUNCTION_ARGS);

Datum LWGEOM_force_2d(PG_FUNCTION_ARGS);
Datum LWGEOM_force_3dm(PG_FUNCTION_ARGS);
Datum LWGEOM_force_3dz(PG_FUNCTION_ARGS);
Datum LWGEOM_force_4d(PG_FUNCTION_ARGS);
Datum LWGEOM_force_collection(PG_FUNCTION_ARGS);
Datum LWGEOM_force_multi(PG_FUNCTION_ARGS);

Datum LWGEOMFromWKB(PG_FUNCTION_ARGS);
Datum WKBFromLWGEOM(PG_FUNCTION_ARGS);

Datum LWGEOM_getBBOX(PG_FUNCTION_ARGS);
Datum LWGEOM_addBBOX(PG_FUNCTION_ARGS);
Datum LWGEOM_dropBBOX(PG_FUNCTION_ARGS);

#endif /* !defined _LWGEOM_PG_H 1 */