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/*
* contrib/btree_gist/btree_float8.c
*/
#include "postgres.h"
#include "btree_gist.h"
#include "btree_utils_num.h"
typedef struct float8key
{
float8 lower;
float8 upper;
} float8KEY;
/*
** float8 ops
*/
PG_FUNCTION_INFO_V1(gbt_float8_compress);
PG_FUNCTION_INFO_V1(gbt_float8_fetch);
PG_FUNCTION_INFO_V1(gbt_float8_union);
PG_FUNCTION_INFO_V1(gbt_float8_picksplit);
PG_FUNCTION_INFO_V1(gbt_float8_consistent);
PG_FUNCTION_INFO_V1(gbt_float8_distance);
PG_FUNCTION_INFO_V1(gbt_float8_penalty);
PG_FUNCTION_INFO_V1(gbt_float8_same);
PG_FUNCTION_INFO_V1(gbt_float8_sortsupport);
static bool
gbt_float8gt(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const float8 *) a) > *((const float8 *) b));
}
static bool
gbt_float8ge(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const float8 *) a) >= *((const float8 *) b));
}
static bool
gbt_float8eq(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const float8 *) a) == *((const float8 *) b));
}
static bool
gbt_float8le(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const float8 *) a) <= *((const float8 *) b));
}
static bool
gbt_float8lt(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const float8 *) a) < *((const float8 *) b));
}
static int
gbt_float8key_cmp(const void *a, const void *b, FmgrInfo *flinfo)
{
float8KEY *ia = (float8KEY *) (((const Nsrt *) a)->t);
float8KEY *ib = (float8KEY *) (((const Nsrt *) b)->t);
if (ia->lower == ib->lower)
{
if (ia->upper == ib->upper)
return 0;
return (ia->upper > ib->upper) ? 1 : -1;
}
return (ia->lower > ib->lower) ? 1 : -1;
}
static float8
gbt_float8_dist(const void *a, const void *b, FmgrInfo *flinfo)
{
float8 arg1 = *(const float8 *) a;
float8 arg2 = *(const float8 *) b;
float8 r;
r = arg1 - arg2;
CHECKFLOATVAL(r, isinf(arg1) || isinf(arg2), true);
return Abs(r);
}
static const gbtree_ninfo tinfo =
{
gbt_t_float8,
sizeof(float8),
16, /* sizeof(gbtreekey16) */
gbt_float8gt,
gbt_float8ge,
gbt_float8eq,
gbt_float8le,
gbt_float8lt,
gbt_float8key_cmp,
gbt_float8_dist
};
PG_FUNCTION_INFO_V1(float8_dist);
Datum
float8_dist(PG_FUNCTION_ARGS)
{
float8 a = PG_GETARG_FLOAT8(0);
float8 b = PG_GETARG_FLOAT8(1);
float8 r;
r = a - b;
CHECKFLOATVAL(r, isinf(a) || isinf(b), true);
PG_RETURN_FLOAT8(Abs(r));
}
/**************************************************
* float8 ops
**************************************************/
Datum
gbt_float8_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
}
Datum
gbt_float8_fetch(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
}
Datum
gbt_float8_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
float8 query = PG_GETARG_FLOAT8(1);
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
/* Oid subtype = PG_GETARG_OID(3); */
bool *recheck = (bool *) PG_GETARG_POINTER(4);
float8KEY *kkk = (float8KEY *) DatumGetPointer(entry->key);
GBT_NUMKEY_R key;
/* All cases served by this function are exact */
*recheck = false;
key.lower = (GBT_NUMKEY *) &kkk->lower;
key.upper = (GBT_NUMKEY *) &kkk->upper;
PG_RETURN_BOOL(gbt_num_consistent(&key, (void *) &query, &strategy,
GIST_LEAF(entry), &tinfo,
fcinfo->flinfo));
}
Datum
gbt_float8_distance(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
float8 query = PG_GETARG_FLOAT8(1);
/* Oid subtype = PG_GETARG_OID(3); */
float8KEY *kkk = (float8KEY *) DatumGetPointer(entry->key);
GBT_NUMKEY_R key;
key.lower = (GBT_NUMKEY *) &kkk->lower;
key.upper = (GBT_NUMKEY *) &kkk->upper;
PG_RETURN_FLOAT8(gbt_num_distance(&key, (void *) &query, GIST_LEAF(entry),
&tinfo, fcinfo->flinfo));
}
Datum
gbt_float8_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
void *out = palloc(sizeof(float8KEY));
*(int *) PG_GETARG_POINTER(1) = sizeof(float8KEY);
PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo));
}
Datum
gbt_float8_penalty(PG_FUNCTION_ARGS)
{
float8KEY *origentry = (float8KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
float8KEY *newentry = (float8KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
float *result = (float *) PG_GETARG_POINTER(2);
penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
PG_RETURN_POINTER(result);
}
Datum
gbt_float8_picksplit(PG_FUNCTION_ARGS)
{
PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0),
(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
&tinfo, fcinfo->flinfo));
}
Datum
gbt_float8_same(PG_FUNCTION_ARGS)
{
float8KEY *b1 = (float8KEY *) PG_GETARG_POINTER(0);
float8KEY *b2 = (float8KEY *) PG_GETARG_POINTER(1);
bool *result = (bool *) PG_GETARG_POINTER(2);
*result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
PG_RETURN_POINTER(result);
}
static int
gbt_float8_sort_build_cmp(Datum a, Datum b, SortSupport ssup)
{
float8KEY *ia = (float8KEY *) DatumGetPointer(a);
float8KEY *ib = (float8KEY *) DatumGetPointer(b);
/* for leaf items we expect lower == upper */
Assert(ia->lower == ia->upper);
Assert(ib->lower == ib->upper);
if (ia->lower == ib->lower)
return 0;
return (ia->lower > ib->lower) ? 1 : -1;
}
static Datum
gbt_float8_abbrev_convert(Datum original, SortSupport ssup)
{
float8KEY *b1 = (float8KEY *) DatumGetPointer(original);
float8 z = b1->lower;
#if SIZEOF_DATUM == 8
return Float8GetDatum(z);
#else
return Float4GetDatum((float4) z);
#endif
}
static int
gbt_float8_cmp_abbrev(Datum z1, Datum z2, SortSupport ssup)
{
#if SIZEOF_DATUM == 8
float8 a = DatumGetFloat8(z1);
float8 b = DatumGetFloat8(z2);
#else
float4 a = DatumGetFloat4(z1);
float4 b = DatumGetFloat4(z2);
#endif
if (a > b)
return 1;
else if (a < b)
return -1;
else
return 0;
}
static bool
gbt_float8_abbrev_abort(int memtupcount, SortSupport ssup)
{
return false;
}
/*
* Sort support routine for fast GiST index build by sorting.
*/
Datum
gbt_float8_sortsupport(PG_FUNCTION_ARGS)
{
SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
if (ssup->abbreviate)
{
ssup->comparator = gbt_float8_cmp_abbrev;
ssup->abbrev_converter = gbt_float8_abbrev_convert;
ssup->abbrev_abort = gbt_float8_abbrev_abort;
ssup->abbrev_full_comparator = gbt_float8_sort_build_cmp;
}
else
{
ssup->comparator = gbt_float8_sort_build_cmp;
}
PG_RETURN_VOID();
}
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