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/*
* contrib/btree_gist/btree_int2.c
*/
#include "postgres.h"
#include "btree_gist.h"
#include "btree_utils_num.h"
#include "common/int.h"
typedef struct int16key
{
int16 lower;
int16 upper;
} int16KEY;
/*
** int16 ops
*/
PG_FUNCTION_INFO_V1(gbt_int2_compress);
PG_FUNCTION_INFO_V1(gbt_int2_fetch);
PG_FUNCTION_INFO_V1(gbt_int2_union);
PG_FUNCTION_INFO_V1(gbt_int2_picksplit);
PG_FUNCTION_INFO_V1(gbt_int2_consistent);
PG_FUNCTION_INFO_V1(gbt_int2_distance);
PG_FUNCTION_INFO_V1(gbt_int2_penalty);
PG_FUNCTION_INFO_V1(gbt_int2_same);
static bool
gbt_int2gt(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const int16 *) a) > *((const int16 *) b));
}
static bool
gbt_int2ge(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const int16 *) a) >= *((const int16 *) b));
}
static bool
gbt_int2eq(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const int16 *) a) == *((const int16 *) b));
}
static bool
gbt_int2le(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const int16 *) a) <= *((const int16 *) b));
}
static bool
gbt_int2lt(const void *a, const void *b, FmgrInfo *flinfo)
{
return (*((const int16 *) a) < *((const int16 *) b));
}
static int
gbt_int2key_cmp(const void *a, const void *b, FmgrInfo *flinfo)
{
int16KEY *ia = (int16KEY *) (((const Nsrt *) a)->t);
int16KEY *ib = (int16KEY *) (((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_int2_dist(const void *a, const void *b, FmgrInfo *flinfo)
{
return GET_FLOAT_DISTANCE(int16, a, b);
}
static const gbtree_ninfo tinfo =
{
gbt_t_int2,
sizeof(int16),
4, /* sizeof(gbtreekey4) */
gbt_int2gt,
gbt_int2ge,
gbt_int2eq,
gbt_int2le,
gbt_int2lt,
gbt_int2key_cmp,
gbt_int2_dist
};
PG_FUNCTION_INFO_V1(int2_dist);
Datum
int2_dist(PG_FUNCTION_ARGS)
{
int16 a = PG_GETARG_INT16(0);
int16 b = PG_GETARG_INT16(1);
int16 r;
int16 ra;
if (pg_sub_s16_overflow(a, b, &r) ||
r == PG_INT16_MIN)
ereport(ERROR,
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("smallint out of range")));
ra = Abs(r);
PG_RETURN_INT16(ra);
}
/**************************************************
* int16 ops
**************************************************/
Datum
gbt_int2_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
}
Datum
gbt_int2_fetch(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
}
Datum
gbt_int2_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
int16 query = PG_GETARG_INT16(1);
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
/* Oid subtype = PG_GETARG_OID(3); */
bool *recheck = (bool *) PG_GETARG_POINTER(4);
int16KEY *kkk = (int16KEY *) 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_int2_distance(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
int16 query = PG_GETARG_INT16(1);
/* Oid subtype = PG_GETARG_OID(3); */
int16KEY *kkk = (int16KEY *) 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_int2_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
void *out = palloc(sizeof(int16KEY));
*(int *) PG_GETARG_POINTER(1) = sizeof(int16KEY);
PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo));
}
Datum
gbt_int2_penalty(PG_FUNCTION_ARGS)
{
int16KEY *origentry = (int16KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
int16KEY *newentry = (int16KEY *) 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_int2_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_int2_same(PG_FUNCTION_ARGS)
{
int16KEY *b1 = (int16KEY *) PG_GETARG_POINTER(0);
int16KEY *b2 = (int16KEY *) 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);
}
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