postgresql/contrib/btree_gist/btree_inet.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

225 lines
5.5 KiB
C

#include "btree_gist.h"
#include "btree_utils_num.h"
#include "utils/builtins.h"
#include "utils/inet.h"
#include "catalog/pg_type.h"
typedef struct inetkey
{
double lower;
double upper;
} inetKEY;
/*
** inet ops
*/
PG_FUNCTION_INFO_V1(gbt_inet_compress);
PG_FUNCTION_INFO_V1(gbt_cidr_compress);
PG_FUNCTION_INFO_V1(gbt_inet_union);
PG_FUNCTION_INFO_V1(gbt_inet_picksplit);
PG_FUNCTION_INFO_V1(gbt_inet_consistent);
PG_FUNCTION_INFO_V1(gbt_cidr_consistent);
PG_FUNCTION_INFO_V1(gbt_inet_penalty);
PG_FUNCTION_INFO_V1(gbt_inet_same);
Datum gbt_inet_compress(PG_FUNCTION_ARGS);
Datum gbt_cidr_compress(PG_FUNCTION_ARGS);
Datum gbt_inet_union(PG_FUNCTION_ARGS);
Datum gbt_inet_picksplit(PG_FUNCTION_ARGS);
Datum gbt_inet_consistent(PG_FUNCTION_ARGS);
Datum gbt_cidr_consistent(PG_FUNCTION_ARGS);
Datum gbt_inet_penalty(PG_FUNCTION_ARGS);
Datum gbt_inet_same(PG_FUNCTION_ARGS);
static bool gbt_inetgt (const void *a, const void *b)
{
return ( *((double*)a) > *((double*)b) );
}
static bool gbt_inetge (const void *a, const void *b)
{
return ( *((double*)a) >= *((double*)b) );
}
static bool gbt_ineteq (const void *a, const void *b)
{
return ( *((double*)a) == *((double*)b) );
}
static bool gbt_inetle (const void *a, const void *b)
{
return ( *((double*)a) <= *((double*)b) );
}
static bool gbt_inetlt (const void *a, const void *b)
{
return ( *((double*)a) < *((double*)b) );
}
static int
gbt_inetkey_cmp(const void *a, const void *b)
{
if ( *(double*)(&((Nsrt *) a)->t[0]) > *(double*)(&((Nsrt *) b)->t[0]) ){
return 1;
} else
if ( *(double*)(&((Nsrt *) a)->t[0]) < *(double*)(&((Nsrt *) b)->t[0]) ){
return -1;
}
return 0;
}
static const gbtree_ninfo tinfo =
{
gbt_t_inet,
sizeof(double),
gbt_inetgt,
gbt_inetge,
gbt_ineteq,
gbt_inetle,
gbt_inetlt,
gbt_inetkey_cmp
};
/**************************************************
* inet ops
**************************************************/
static GISTENTRY *
gbt_inet_compress_inetrnal(GISTENTRY *retval , GISTENTRY *entry , Oid typid)
{
if (entry->leafkey)
{
inetKEY *r = (inetKEY *) palloc(sizeof(inetKEY));
retval = palloc(sizeof(GISTENTRY));
r->lower = convert_network_to_scalar(entry->key, typid );
r->upper = r->lower ;
gistentryinit(*retval, PointerGetDatum(r),
entry->rel, entry->page,
entry->offset, sizeof(inetKEY), FALSE);
}
else
retval = entry;
return ( retval );
}
Datum
gbt_inet_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
GISTENTRY *retval = NULL;
PG_RETURN_POINTER( gbt_inet_compress_inetrnal(retval ,entry ,INETOID ) );
}
Datum
gbt_cidr_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
GISTENTRY *retval = NULL;
PG_RETURN_POINTER( gbt_inet_compress_inetrnal(retval ,entry ,CIDROID ) );
}
static bool
gbt_inet_consistent_internal (
const GISTENTRY * entry,
const double * query,
const StrategyNumber * strategy
){
inetKEY *kkk = (inetKEY *) DatumGetPointer(entry->key);
GBT_NUMKEY_R key ;
key.lower = (GBT_NUMKEY*) &kkk->lower ;
key.upper = (GBT_NUMKEY*) &kkk->upper ;
return (
gbt_num_consistent( &key, (void*)query,strategy,GIST_LEAF(entry),&tinfo)
);
}
Datum
gbt_inet_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
double query = convert_network_to_scalar( PG_GETARG_DATUM(1) ,INETOID );
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
PG_RETURN_BOOL(
gbt_inet_consistent_internal ( entry, &query, &strategy )
);
}
Datum
gbt_cidr_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
double query = convert_network_to_scalar( PG_GETARG_DATUM(1) ,CIDROID );
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
PG_RETURN_BOOL(
gbt_inet_consistent_internal ( entry, &query, &strategy )
);
}
Datum
gbt_inet_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
void *out = palloc(sizeof(inetKEY));
*(int *) PG_GETARG_POINTER(1) = sizeof(inetKEY);
PG_RETURN_POINTER( gbt_num_union ( (void*)out, entryvec, &tinfo ) );
}
Datum
gbt_inet_penalty(PG_FUNCTION_ARGS)
{
inetKEY *origentry = (inetKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
inetKEY *newentry = (inetKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
float *result = (float *) PG_GETARG_POINTER(2);
double res ;
*result = 0.0;
penalty_range_enlarge ( origentry->lower, origentry->upper, newentry->lower, newentry->upper );
if ( res > 0 ){
*result += FLT_MIN ;
*result += (float) ( res / ( (double) ( res + origentry->upper - origentry->lower ) ) );
*result *= ( FLT_MAX / ( ( (GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1 ) );
}
PG_RETURN_POINTER(result);
}
Datum
gbt_inet_picksplit(PG_FUNCTION_ARGS)
{
PG_RETURN_POINTER(gbt_num_picksplit(
(GistEntryVector *) PG_GETARG_POINTER(0),
(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
&tinfo
));
}
Datum
gbt_inet_same(PG_FUNCTION_ARGS)
{
inetKEY *b1 = (inetKEY *) PG_GETARG_POINTER(0);
inetKEY *b2 = (inetKEY *) PG_GETARG_POINTER(1);
bool *result = (bool *) PG_GETARG_POINTER(2);
*result = gbt_num_same ( (void*)b1, (void*)b2, &tinfo );
PG_RETURN_POINTER(result);
}