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Sourcecode: postgresql-8.4 version File versions

btree_int2.c

/*
 * $PostgreSQL: pgsql/contrib/btree_gist/btree_int2.c,v 1.8 2009/06/11 14:48:50 momjian Exp $
 */
#include "btree_gist.h"
#include "btree_utils_num.h"

typedef struct int16key
{
      int16       lower;
      int16       upper;
} int16KEY;

/*
** int16 ops
*/
PG_FUNCTION_INFO_V1(gbt_int2_compress);
PG_FUNCTION_INFO_V1(gbt_int2_union);
PG_FUNCTION_INFO_V1(gbt_int2_picksplit);
PG_FUNCTION_INFO_V1(gbt_int2_consistent);
PG_FUNCTION_INFO_V1(gbt_int2_penalty);
PG_FUNCTION_INFO_V1(gbt_int2_same);

Datum       gbt_int2_compress(PG_FUNCTION_ARGS);
Datum       gbt_int2_union(PG_FUNCTION_ARGS);
Datum       gbt_int2_picksplit(PG_FUNCTION_ARGS);
Datum       gbt_int2_consistent(PG_FUNCTION_ARGS);
Datum       gbt_int2_penalty(PG_FUNCTION_ARGS);
Datum       gbt_int2_same(PG_FUNCTION_ARGS);

static bool
gbt_int2gt(const void *a, const void *b)
{
      return (*((int16 *) a) > *((int16 *) b));
}
static bool
gbt_int2ge(const void *a, const void *b)
{
      return (*((int16 *) a) >= *((int16 *) b));
}
static bool
gbt_int2eq(const void *a, const void *b)
{
      return (*((int16 *) a) == *((int16 *) b));
}
static bool
gbt_int2le(const void *a, const void *b)
{
      return (*((int16 *) a) <= *((int16 *) b));
}
static bool
gbt_int2lt(const void *a, const void *b)
{
      return (*((int16 *) a) < *((int16 *) b));
}

static int
gbt_int2key_cmp(const void *a, const void *b)
{

      if (*(int16 *) (&((Nsrt *) a)->t[0]) > *(int16 *) &(((Nsrt *) b)->t[0]))
            return 1;
      else if (*(int16 *) &(((Nsrt *) a)->t[0]) < *(int16 *) &(((Nsrt *) b)->t[0]))
            return -1;
      return 0;

}


static const gbtree_ninfo tinfo =
{
      gbt_t_int2,
      sizeof(int16),
      gbt_int2gt,
      gbt_int2ge,
      gbt_int2eq,
      gbt_int2le,
      gbt_int2lt,
      gbt_int2key_cmp
};






/**************************************************
 * int16 ops
 **************************************************/


Datum
gbt_int2_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_int2_consistent(PG_FUNCTION_ARGS)
{
      GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
      int16       query = PG_GETARG_INT16(1);
      StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);

      /* Oid            subtype = PG_GETARG_OID(3); */
      bool     *recheck = (bool *) PG_GETARG_POINTER(4);
      int16KEY   *kkk = (int16KEY *) 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_int2_union(PG_FUNCTION_ARGS)
{
      GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
      void     *out = palloc(sizeof(int16KEY));

      *(int *) PG_GETARG_POINTER(1) = sizeof(int16KEY);
      PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo));
}


Datum
gbt_int2_penalty(PG_FUNCTION_ARGS)
{
      int16KEY   *origentry = (int16KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
      int16KEY   *newentry = (int16KEY *) 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_int2_picksplit(PG_FUNCTION_ARGS)
{
      PG_RETURN_POINTER(gbt_num_picksplit(
                                                      (GistEntryVector *) PG_GETARG_POINTER(0),
                                                        (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
                                                            &tinfo
                                                            ));
}

Datum
gbt_int2_same(PG_FUNCTION_ARGS)
{
      int16KEY   *b1 = (int16KEY *) PG_GETARG_POINTER(0);
      int16KEY   *b2 = (int16KEY *) 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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