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/*
* contrib/btree_gist/btree_float4.c
*/
#include "postgres.h"
#include "btree_gist.h"
#include "btree_utils_num.h"
#include "utils/float.h"
#include "utils/sortsupport.h"
typedef struct float4key
{
float4 lower;
float4 upper;
} float4KEY;
/* GiST support functions */
PG_FUNCTION_INFO_V1(gbt_float4_compress);
PG_FUNCTION_INFO_V1(gbt_float4_fetch);
PG_FUNCTION_INFO_V1(gbt_float4_union);
PG_FUNCTION_INFO_V1(gbt_float4_picksplit);
PG_FUNCTION_INFO_V1(gbt_float4_consistent);
PG_FUNCTION_INFO_V1(gbt_float4_distance);
PG_FUNCTION_INFO_V1(gbt_float4_penalty);
PG_FUNCTION_INFO_V1(gbt_float4_same);
PG_FUNCTION_INFO_V1(gbt_float4_sortsupport);
static bool
gbt_float4gt(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const float4 *) a) > *((const float4 *) b));
}
static bool
gbt_float4ge(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const float4 *) a) >= *((const float4 *) b));
}
static bool
gbt_float4eq(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const float4 *) a) == *((const float4 *) b));
}
static bool
gbt_float4le(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const float4 *) a) <= *((const float4 *) b));
}
static bool
gbt_float4lt(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const float4 *) a) < *((const float4 *) b));
}
static int
gbt_float4key_cmp(const void *a, const void *b, FmgrInfo *flinfo)
{
float4KEY *ia = (float4KEY *) (((const Nsrt *) a)->t);
float4KEY *ib = (float4KEY *) (((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_float4_dist(const void *a, const void *b, FmgrInfo *flinfo)
{
return GET_FLOAT_DISTANCE(float4, a, b);
}
static const gbtree_ninfo tinfo =
{
gbt_t_float4,
sizeof(float4),
8, /* sizeof(gbtreekey8) */
gbt_float4gt,
gbt_float4ge,
gbt_float4eq,
gbt_float4le,
gbt_float4lt,
gbt_float4key_cmp,
gbt_float4_dist
};
PG_FUNCTION_INFO_V1(float4_dist);
Datum
float4_dist(PG_FUNCTION_ARGS)
{
float4 a = PG_GETARG_FLOAT4(0);
float4 b = PG_GETARG_FLOAT4(1);
float4 r;
r = a - b;
if (unlikely(isinf(r)) && !isinf(a) && !isinf(b))
float_overflow_error();
PG_RETURN_FLOAT4(fabsf(r));
}
/**************************************************
* GiST support functions
**************************************************/
Datum
gbt_float4_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
}
Datum
gbt_float4_fetch(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
}
Datum
gbt_float4_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
float4 query = PG_GETARG_FLOAT4(1);
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
/* Oid subtype = PG_GETARG_OID(3); */
bool *recheck = (bool *) PG_GETARG_POINTER(4);
float4KEY *kkk = (float4KEY *) 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, &query, &strategy,
GIST_LEAF(entry), &tinfo,
fcinfo->flinfo));
}
Datum
gbt_float4_distance(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
float4 query = PG_GETARG_FLOAT4(1);
/* Oid subtype = PG_GETARG_OID(3); */
float4KEY *kkk = (float4KEY *) 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, &query, GIST_LEAF(entry),
&tinfo, fcinfo->flinfo));
}
Datum
gbt_float4_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
void *out = palloc(sizeof(float4KEY));
*(int *) PG_GETARG_POINTER(1) = sizeof(float4KEY);
PG_RETURN_POINTER(gbt_num_union(out, entryvec, &tinfo, fcinfo->flinfo));
}
Datum
gbt_float4_penalty(PG_FUNCTION_ARGS)
{
float4KEY *origentry = (float4KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
float4KEY *newentry = (float4KEY *) 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_float4_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_float4_same(PG_FUNCTION_ARGS)
{
float4KEY *b1 = (float4KEY *) PG_GETARG_POINTER(0);
float4KEY *b2 = (float4KEY *) 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_float4_ssup_cmp(Datum x, Datum y, SortSupport ssup)
{
float4KEY *arg1 = (float4KEY *) DatumGetPointer(x);
float4KEY *arg2 = (float4KEY *) DatumGetPointer(y);
/* for leaf items we expect lower == upper, so only compare lower */
return float4_cmp_internal(arg1->lower, arg2->lower);
}
Datum
gbt_float4_sortsupport(PG_FUNCTION_ARGS)
{
SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
ssup->comparator = gbt_float4_ssup_cmp;
ssup->ssup_extra = NULL;
PG_RETURN_VOID();
}
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