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Sourcecode: postgresql-8.4 version File versions

btree_cash.c

/*
 * $PostgreSQL: pgsql/contrib/btree_gist/btree_cash.c,v 1.9 2009/06/11 14:48:50 momjian Exp $
 */
#include "btree_gist.h"
#include "btree_utils_num.h"
#include "utils/cash.h"

typedef struct
{
      Cash        lower;
      Cash        upper;
} cashKEY;

/*
** Cash ops
*/
PG_FUNCTION_INFO_V1(gbt_cash_compress);
PG_FUNCTION_INFO_V1(gbt_cash_union);
PG_FUNCTION_INFO_V1(gbt_cash_picksplit);
PG_FUNCTION_INFO_V1(gbt_cash_consistent);
PG_FUNCTION_INFO_V1(gbt_cash_penalty);
PG_FUNCTION_INFO_V1(gbt_cash_same);

Datum       gbt_cash_compress(PG_FUNCTION_ARGS);
Datum       gbt_cash_union(PG_FUNCTION_ARGS);
Datum       gbt_cash_picksplit(PG_FUNCTION_ARGS);
Datum       gbt_cash_consistent(PG_FUNCTION_ARGS);
Datum       gbt_cash_penalty(PG_FUNCTION_ARGS);
Datum       gbt_cash_same(PG_FUNCTION_ARGS);

static bool
gbt_cashgt(const void *a, const void *b)
{
      return (*((Cash *) a) > *((Cash *) b));
}
static bool
gbt_cashge(const void *a, const void *b)
{
      return (*((Cash *) a) >= *((Cash *) b));
}
static bool
gbt_casheq(const void *a, const void *b)
{
      return (*((Cash *) a) == *((Cash *) b));
}
static bool
gbt_cashle(const void *a, const void *b)
{
      return (*((Cash *) a) <= *((Cash *) b));
}
static bool
gbt_cashlt(const void *a, const void *b)
{
      return (*((Cash *) a) < *((Cash *) b));
}

static int
gbt_cashkey_cmp(const void *a, const void *b)
{

      if (*(Cash *) &(((Nsrt *) a)->t[0]) > *(Cash *) &(((Nsrt *) b)->t[0]))
            return 1;
      else if (*(Cash *) &(((Nsrt *) a)->t[0]) < *(Cash *) &(((Nsrt *) b)->t[0]))
            return -1;
      return 0;

}


static const gbtree_ninfo tinfo =
{
      gbt_t_cash,
      sizeof(Cash),
      gbt_cashgt,
      gbt_cashge,
      gbt_casheq,
      gbt_cashle,
      gbt_cashlt,
      gbt_cashkey_cmp
};


/**************************************************
 * Cash ops
 **************************************************/


Datum
gbt_cash_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_cash_consistent(PG_FUNCTION_ARGS)
{
      GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
      Cash        query = PG_GETARG_CASH(1);
      StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);

      /* Oid            subtype = PG_GETARG_OID(3); */
      bool     *recheck = (bool *) PG_GETARG_POINTER(4);
      cashKEY    *kkk = (cashKEY *) 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)
            );
}


Datum
gbt_cash_union(PG_FUNCTION_ARGS)
{
      GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
      void     *out = palloc(sizeof(cashKEY));

      *(int *) PG_GETARG_POINTER(1) = sizeof(cashKEY);
      PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo));
}


Datum
gbt_cash_penalty(PG_FUNCTION_ARGS)
{
      cashKEY    *origentry = (cashKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
      cashKEY    *newentry = (cashKEY *) 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_cash_picksplit(PG_FUNCTION_ARGS)
{
      PG_RETURN_POINTER(gbt_num_picksplit(
                                                      (GistEntryVector *) PG_GETARG_POINTER(0),
                                                        (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
                                                            &tinfo
                                                            ));
}

Datum
gbt_cash_same(PG_FUNCTION_ARGS)
{
      cashKEY    *b1 = (cashKEY *) PG_GETARG_POINTER(0);
      cashKEY    *b2 = (cashKEY *) 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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