multirangetypes.h

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/*-------------------------------------------------------------------------
 *
 * multirangetypes.h
 *    Declarations for Postgres multirange types.
 *
 *
 * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/utils/multirangetypes.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef MULTIRANGETYPES_H
#define MULTIRANGETYPES_H
 
#include "utils/rangetypes.h"
#include "utils/typcache.h"
 
 
/*
 * Multiranges are varlena objects, so must meet the varlena convention that
 * the first int32 of the object contains the total object size in bytes.
 * Be sure to use VARSIZE() and SET_VARSIZE() to access it, though!
 */
typedef struct
{
    int32       vl_len_;        /* varlena header (do not touch directly!) */
    Oid         multirangetypid;    /* multirange type's own OID */
    uint32      rangeCount;     /* the number of ranges */
 
    /*
     * Following the count are the range objects themselves, as ShortRangeType
     * structs. Note that ranges are varlena too, depending on whether they
     * have lower/upper bounds and because even their base types can be
     * varlena. So we can't really index into this list.
     */
} MultirangeType;
 
/* Use these macros in preference to accessing these fields directly */
#define MultirangeTypeGetOid(mr)    ((mr)->multirangetypid)
#define MultirangeIsEmpty(mr)  ((mr)->rangeCount == 0)
 
/*
 * fmgr functions for multirange type objects
 */
static inline MultirangeType *
DatumGetMultirangeTypeP(Datum X)
{
    return (MultirangeType *) PG_DETOAST_DATUM(X);
}
 
static inline MultirangeType *
DatumGetMultirangeTypePCopy(Datum X)
{
    return (MultirangeType *) PG_DETOAST_DATUM_COPY(X);
}
 
static inline Datum
MultirangeTypePGetDatum(const MultirangeType *X)
{
    return PointerGetDatum(X);
}
 
#define PG_GETARG_MULTIRANGE_P(n)       DatumGetMultirangeTypeP(PG_GETARG_DATUM(n))
#define PG_GETARG_MULTIRANGE_P_COPY(n)  DatumGetMultirangeTypePCopy(PG_GETARG_DATUM(n))
#define PG_RETURN_MULTIRANGE_P(x)       return MultirangeTypePGetDatum(x)
 
/*
 * prototypes for functions defined in multirangetypes.c
 */
 
/* internal versions of the above */
extern bool multirange_eq_internal(TypeCacheEntry *rangetyp,
                                   const MultirangeType *mr1,
                                   const MultirangeType *mr2);
extern bool multirange_ne_internal(TypeCacheEntry *rangetyp,
                                   const MultirangeType *mr1,
                                   const MultirangeType *mr2);
extern bool multirange_contains_elem_internal(TypeCacheEntry *rangetyp,
                                              const MultirangeType *mr,
                                              Datum val);
extern bool multirange_contains_range_internal(TypeCacheEntry *rangetyp,
                                               const MultirangeType *mr,
                                               const RangeType *r);
extern bool range_contains_multirange_internal(TypeCacheEntry *rangetyp,
                                               const RangeType *r,
                                               const MultirangeType *mr);
extern bool multirange_contains_multirange_internal(TypeCacheEntry *rangetyp,
                                                    const MultirangeType *mr1,
                                                    const MultirangeType *mr2);
extern bool range_overlaps_multirange_internal(TypeCacheEntry *rangetyp,
                                               const RangeType *r,
                                               const MultirangeType *mr);
extern bool multirange_overlaps_multirange_internal(TypeCacheEntry *rangetyp,
                                                    const MultirangeType *mr1,
                                                    const MultirangeType *mr2);
extern bool range_overleft_multirange_internal(TypeCacheEntry *rangetyp,
                                               const RangeType *r,
                                               const MultirangeType *mr);
extern bool range_overright_multirange_internal(TypeCacheEntry *rangetyp,
                                                const RangeType *r,
                                                const MultirangeType *mr);
extern bool range_before_multirange_internal(TypeCacheEntry *rangetyp,
                                             const RangeType *r,
                                             const MultirangeType *mr);
extern bool range_after_multirange_internal(TypeCacheEntry *rangetyp,
                                            const RangeType *r,
                                            const MultirangeType *mr);
extern bool range_adjacent_multirange_internal(TypeCacheEntry *rangetyp,
                                               const RangeType *r,
                                               const MultirangeType *mr);
extern bool multirange_before_multirange_internal(TypeCacheEntry *rangetyp,
                                                  const MultirangeType *mr1,
                                                  const MultirangeType *mr2);
extern MultirangeType *multirange_minus_internal(Oid mltrngtypoid,
                                                 TypeCacheEntry *rangetyp,
                                                 int32 range_count1,
                                                 RangeType **ranges1,
                                                 int32 range_count2,
                                                 RangeType **ranges2);
extern MultirangeType *multirange_intersect_internal(Oid mltrngtypoid,
                                                     TypeCacheEntry *rangetyp,
                                                     int32 range_count1,
                                                     RangeType **ranges1,
                                                     int32 range_count2,
                                                     RangeType **ranges2);
 
/* assorted support functions */
extern TypeCacheEntry *multirange_get_typcache(FunctionCallInfo fcinfo,
                                               Oid mltrngtypid);
extern void multirange_deserialize(TypeCacheEntry *rangetyp,
                                   const MultirangeType *multirange,
                                   int32 *range_count,
                                   RangeType ***ranges);
extern MultirangeType *make_multirange(Oid mltrngtypoid,
                                       TypeCacheEntry *rangetyp,
                                       int32 range_count, RangeType **ranges);
extern MultirangeType *make_empty_multirange(Oid mltrngtypoid,
                                             TypeCacheEntry *rangetyp);
extern void multirange_get_bounds(TypeCacheEntry *rangetyp,
                                  const MultirangeType *multirange,
                                  uint32 i,
                                  RangeBound *lower, RangeBound *upper);
extern RangeType *multirange_get_range(TypeCacheEntry *rangetyp,
                                       const MultirangeType *multirange, int i);
extern RangeType *multirange_get_union_range(TypeCacheEntry *rangetyp,
                                             const MultirangeType *mr);
 
#endif                          /* MULTIRANGETYPES_H */