postgresql/contrib/btree_gist/btree_macaddr.c
Teodor Sigaev 7b81988f9b - Add aligment of variable data types
- Add aligment for interval data types
- Avoid floating point overflow in penalty functions
Janko Richter <jankorichter@yahoo.de> and teodor
2004-06-03 12:26:10 +00:00

185 lines
4.8 KiB
C

#include "btree_gist.h"
#include "btree_utils_num.h"
#include "utils/builtins.h"
#include "utils/inet.h"
typedef struct
{
macaddr lower;
macaddr upper;
} macKEY;
/*
** OID ops
*/
PG_FUNCTION_INFO_V1(gbt_macad_compress);
PG_FUNCTION_INFO_V1(gbt_macad_union);
PG_FUNCTION_INFO_V1(gbt_macad_picksplit);
PG_FUNCTION_INFO_V1(gbt_macad_consistent);
PG_FUNCTION_INFO_V1(gbt_macad_penalty);
PG_FUNCTION_INFO_V1(gbt_macad_same);
Datum gbt_macad_compress(PG_FUNCTION_ARGS);
Datum gbt_macad_union(PG_FUNCTION_ARGS);
Datum gbt_macad_picksplit(PG_FUNCTION_ARGS);
Datum gbt_macad_consistent(PG_FUNCTION_ARGS);
Datum gbt_macad_penalty(PG_FUNCTION_ARGS);
Datum gbt_macad_same(PG_FUNCTION_ARGS);
static bool gbt_macadgt (const void *a, const void *b)
{
return DatumGetBool(DirectFunctionCall2(macaddr_gt,PointerGetDatum(a),PointerGetDatum(b)));
}
static bool gbt_macadge (const void *a, const void *b)
{
return DatumGetBool(DirectFunctionCall2(macaddr_ge,PointerGetDatum(a),PointerGetDatum(b)));
}
static bool gbt_macadeq (const void *a, const void *b)
{
return DatumGetBool(DirectFunctionCall2(macaddr_eq,PointerGetDatum(a),PointerGetDatum(b)));
}
static bool gbt_macadle (const void *a, const void *b)
{
return DatumGetBool(DirectFunctionCall2(macaddr_le,PointerGetDatum(a),PointerGetDatum(b)));
}
static bool gbt_macadlt (const void *a, const void *b)
{
return DatumGetBool(DirectFunctionCall2(macaddr_lt,PointerGetDatum(a),PointerGetDatum(b)));
}
static int
gbt_macadkey_cmp(const void *a, const void *b)
{
return DatumGetInt32(
DirectFunctionCall2(
macaddr_cmp ,
PointerGetDatum (&((Nsrt *) a)->t[0]),
PointerGetDatum (&((Nsrt *) b)->t[0])
)
);
}
static const gbtree_ninfo tinfo =
{
gbt_t_macad,
sizeof(macaddr),
gbt_macadgt,
gbt_macadge,
gbt_macadeq,
gbt_macadle,
gbt_macadlt,
gbt_macadkey_cmp
};
/**************************************************
* macaddr ops
**************************************************/
static uint64 mac_2_uint64 ( macaddr * m ){
unsigned char * mi = ( unsigned char * ) m;
uint64 res = 0;
int i;
for (i=0; i<6; i++ ){
res += ( ( (uint64) mi[i] ) << ( (uint64) ( (5-i)*8 ) ) );
}
return res;
}
Datum
gbt_macad_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
GISTENTRY *retval = NULL;
PG_RETURN_POINTER( gbt_num_compress( retval , entry , &tinfo ));
}
Datum
gbt_macad_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
macaddr *query = (macaddr *) PG_GETARG_POINTER(1);
macKEY *kkk = (macKEY *) DatumGetPointer(entry->key);
GBT_NUMKEY_R key ;
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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)
);
}
Datum
gbt_macad_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
void *out = palloc(sizeof(macKEY));
*(int *) PG_GETARG_POINTER(1) = sizeof(macKEY);
PG_RETURN_POINTER( gbt_num_union ( (void*)out, entryvec, &tinfo ) );
}
Datum
gbt_macad_penalty(PG_FUNCTION_ARGS)
{
macKEY *origentry = (macKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
macKEY *newentry = (macKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
float *result = (float *) PG_GETARG_POINTER(2);
uint64 iorg[2], inew[2];
uint64 res;
iorg[0] = mac_2_uint64 ( &origentry->lower );
iorg[1] = mac_2_uint64 ( &origentry->upper );
inew[0] = mac_2_uint64 ( &newentry->lower );
inew[1] = mac_2_uint64 ( &newentry->upper );
penalty_range_enlarge ( iorg[0], iorg[1], inew[0], inew[1] );
*result = 0.0;
if ( res > 0 ){
*result += FLT_MIN ;
*result += (float) ( ( (double)res ) / ( (double)res + (double)iorg[1] - (double)iorg[0] ) );
*result *= ( FLT_MAX / ( ( (GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1 ) );
}
PG_RETURN_POINTER(result);
}
Datum
gbt_macad_picksplit(PG_FUNCTION_ARGS)
{
PG_RETURN_POINTER(gbt_num_picksplit(
(GistEntryVector *) PG_GETARG_POINTER(0),
(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
&tinfo
));
}
Datum
gbt_macad_same(PG_FUNCTION_ARGS)
{
macKEY *b1 = (macKEY *) PG_GETARG_POINTER(0);
macKEY *b2 = (macKEY *) PG_GETARG_POINTER(1);
bool *result = (bool *) PG_GETARG_POINTER(2);
*result = gbt_num_same ( (void*)b1, (void*)b2, &tinfo );
PG_RETURN_POINTER(result);
}