postgresql/contrib/btree_gist/btree_bit.c
2010-09-20 22:08:53 +02:00

197 lines
4.1 KiB
C

/*
* contrib/btree_gist/btree_bit.c
*/
#include "btree_gist.h"
#include "btree_utils_var.h"
#include "utils/bytea.h"
#include "utils/varbit.h"
/*
** Bit ops
*/
PG_FUNCTION_INFO_V1(gbt_bit_compress);
PG_FUNCTION_INFO_V1(gbt_bit_union);
PG_FUNCTION_INFO_V1(gbt_bit_picksplit);
PG_FUNCTION_INFO_V1(gbt_bit_consistent);
PG_FUNCTION_INFO_V1(gbt_bit_penalty);
PG_FUNCTION_INFO_V1(gbt_bit_same);
Datum gbt_bit_compress(PG_FUNCTION_ARGS);
Datum gbt_bit_union(PG_FUNCTION_ARGS);
Datum gbt_bit_picksplit(PG_FUNCTION_ARGS);
Datum gbt_bit_consistent(PG_FUNCTION_ARGS);
Datum gbt_bit_penalty(PG_FUNCTION_ARGS);
Datum gbt_bit_same(PG_FUNCTION_ARGS);
/* define for comparison */
static bool
gbt_bitgt(const void *a, const void *b)
{
return (DatumGetBool(DirectFunctionCall2(bitgt, PointerGetDatum(a), PointerGetDatum(b))));
}
static bool
gbt_bitge(const void *a, const void *b)
{
return (DatumGetBool(DirectFunctionCall2(bitge, PointerGetDatum(a), PointerGetDatum(b))));
}
static bool
gbt_biteq(const void *a, const void *b)
{
return (DatumGetBool(DirectFunctionCall2(biteq, PointerGetDatum(a), PointerGetDatum(b))));
}
static bool
gbt_bitle(const void *a, const void *b)
{
return (DatumGetBool(DirectFunctionCall2(bitle, PointerGetDatum(a), PointerGetDatum(b))));
}
static bool
gbt_bitlt(const void *a, const void *b)
{
return (DatumGetBool(DirectFunctionCall2(bitlt, PointerGetDatum(a), PointerGetDatum(b))));
}
static int32
gbt_bitcmp(const bytea *a, const bytea *b)
{
return
(DatumGetInt32(DirectFunctionCall2(byteacmp, PointerGetDatum(a), PointerGetDatum(b))));
}
static bytea *
gbt_bit_xfrm(bytea *leaf)
{
bytea *out = leaf;
int s = INTALIGN(VARBITBYTES(leaf) + VARHDRSZ);
out = palloc(s);
SET_VARSIZE(out, s);
memcpy((void *) VARDATA(out), (void *) VARBITS(leaf), VARBITBYTES(leaf));
return out;
}
static GBT_VARKEY *
gbt_bit_l2n(GBT_VARKEY *leaf)
{
GBT_VARKEY *out = leaf;
GBT_VARKEY_R r = gbt_var_key_readable(leaf);
bytea *o;
o = gbt_bit_xfrm(r.lower);
r.upper = r.lower = o;
out = gbt_var_key_copy(&r, TRUE);
pfree(o);
return out;
}
static const gbtree_vinfo tinfo =
{
gbt_t_bit,
0,
TRUE,
gbt_bitgt,
gbt_bitge,
gbt_biteq,
gbt_bitle,
gbt_bitlt,
gbt_bitcmp,
gbt_bit_l2n
};
/**************************************************
* Bit ops
**************************************************/
Datum
gbt_bit_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_var_compress(entry, &tinfo));
}
Datum
gbt_bit_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
void *query = (void *) DatumGetByteaP(PG_GETARG_DATUM(1));
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
/* Oid subtype = PG_GETARG_OID(3); */
bool *recheck = (bool *) PG_GETARG_POINTER(4);
bool retval = FALSE;
GBT_VARKEY *key = (GBT_VARKEY *) DatumGetPointer(entry->key);
GBT_VARKEY_R r = gbt_var_key_readable(key);
/* All cases served by this function are exact */
*recheck = false;
if (GIST_LEAF(entry))
retval = gbt_var_consistent(&r, query, &strategy, TRUE, &tinfo);
else
{
bytea *q = gbt_bit_xfrm((bytea *) query);
retval = gbt_var_consistent(&r, (void *) q, &strategy, FALSE, &tinfo);
}
PG_RETURN_BOOL(retval);
}
Datum
gbt_bit_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
int32 *size = (int *) PG_GETARG_POINTER(1);
PG_RETURN_POINTER(gbt_var_union(entryvec, size, &tinfo));
}
Datum
gbt_bit_picksplit(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
GIST_SPLITVEC *v = (GIST_SPLITVEC *) PG_GETARG_POINTER(1);
gbt_var_picksplit(entryvec, v, &tinfo);
PG_RETURN_POINTER(v);
}
Datum
gbt_bit_same(PG_FUNCTION_ARGS)
{
Datum d1 = PG_GETARG_DATUM(0);
Datum d2 = PG_GETARG_DATUM(1);
bool *result = (bool *) PG_GETARG_POINTER(2);
PG_RETURN_POINTER(gbt_var_same(result, d1, d2, &tinfo));
}
Datum
gbt_bit_penalty(PG_FUNCTION_ARGS)
{
GISTENTRY *o = (GISTENTRY *) PG_GETARG_POINTER(0);
GISTENTRY *n = (GISTENTRY *) PG_GETARG_POINTER(1);
float *result = (float *) PG_GETARG_POINTER(2);
PG_RETURN_POINTER(gbt_var_penalty(result, o, n, &tinfo));
}