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Sourcecode: postgresql-8.4 version File versions

btree_inet.c

/*
 * $PostgreSQL: pgsql/contrib/btree_gist/btree_inet.c,v 1.9 2008/05/17 01:28:19 adunstan Exp $ 
 */
#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_inet_union);
PG_FUNCTION_INFO_V1(gbt_inet_picksplit);
PG_FUNCTION_INFO_V1(gbt_inet_consistent);
PG_FUNCTION_INFO_V1(gbt_inet_penalty);
PG_FUNCTION_INFO_V1(gbt_inet_same);

Datum       gbt_inet_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_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
 **************************************************/


Datum
gbt_inet_compress(PG_FUNCTION_ARGS)
{
      GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
      GISTENTRY  *retval;

      if (entry->leafkey)
      {
            inetKEY    *r = (inetKEY *) palloc(sizeof(inetKEY));

            retval = palloc(sizeof(GISTENTRY));
            r->lower = convert_network_to_scalar(entry->key, INETOID);
            r->upper = r->lower;
            gistentryinit(*retval, PointerGetDatum(r),
                                entry->rel, entry->page,
                                entry->offset, FALSE);
      }
      else
            retval = entry;

      PG_RETURN_POINTER(retval);
}


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);
      /* Oid            subtype = PG_GETARG_OID(3); */
      bool     *recheck = (bool *) PG_GETARG_POINTER(4);
      inetKEY    *kkk = (inetKEY *) DatumGetPointer(entry->key);
      GBT_NUMKEY_R key;

      /* All cases served by this function are inexact */
      *recheck = true;

      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_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);

      penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);

      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);
}

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