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Sourcecode: postgresql-8.4 version File versions

btree_float4.c

/*
 * $PostgreSQL: pgsql/contrib/btree_gist/btree_float4.c,v 1.8 2009/06/11 14:48:50 momjian Exp $
 */
#include "btree_gist.h"
#include "btree_utils_num.h"

typedef struct float4key
{
      float4            lower;
      float4            upper;
} float4KEY;

/*
** float4 ops
*/
PG_FUNCTION_INFO_V1(gbt_float4_compress);
PG_FUNCTION_INFO_V1(gbt_float4_union);
PG_FUNCTION_INFO_V1(gbt_float4_picksplit);
PG_FUNCTION_INFO_V1(gbt_float4_consistent);
PG_FUNCTION_INFO_V1(gbt_float4_penalty);
PG_FUNCTION_INFO_V1(gbt_float4_same);

Datum       gbt_float4_compress(PG_FUNCTION_ARGS);
Datum       gbt_float4_union(PG_FUNCTION_ARGS);
Datum       gbt_float4_picksplit(PG_FUNCTION_ARGS);
Datum       gbt_float4_consistent(PG_FUNCTION_ARGS);
Datum       gbt_float4_penalty(PG_FUNCTION_ARGS);
Datum       gbt_float4_same(PG_FUNCTION_ARGS);

static bool
gbt_float4gt(const void *a, const void *b)
{
      return (*((float4 *) a) > *((float4 *) b));
}
static bool
gbt_float4ge(const void *a, const void *b)
{
      return (*((float4 *) a) >= *((float4 *) b));
}
static bool
gbt_float4eq(const void *a, const void *b)
{
      return (*((float4 *) a) == *((float4 *) b));
}
static bool
gbt_float4le(const void *a, const void *b)
{
      return (*((float4 *) a) <= *((float4 *) b));
}
static bool
gbt_float4lt(const void *a, const void *b)
{
      return (*((float4 *) a) < *((float4 *) b));
}

static int
gbt_float4key_cmp(const void *a, const void *b)
{

      if (*(float4 *) &(((Nsrt *) a)->t[0]) > *(float4 *) &(((Nsrt *) b)->t[0]))
            return 1;
      else if (*(float4 *) &(((Nsrt *) a)->t[0]) < *(float4 *) &(((Nsrt *) b)->t[0]))
            return -1;
      return 0;

}


static const gbtree_ninfo tinfo =
{
      gbt_t_float4,
      sizeof(float4),
      gbt_float4gt,
      gbt_float4ge,
      gbt_float4eq,
      gbt_float4le,
      gbt_float4lt,
      gbt_float4key_cmp
};


/**************************************************
 * float4 ops
 **************************************************/


Datum
gbt_float4_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_float4_consistent(PG_FUNCTION_ARGS)
{
      GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
      float4            query = PG_GETARG_FLOAT4(1);
      StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);

      /* Oid            subtype = PG_GETARG_OID(3); */
      bool     *recheck = (bool *) PG_GETARG_POINTER(4);
      float4KEY  *kkk = (float4KEY *) 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_float4_union(PG_FUNCTION_ARGS)
{
      GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
      void     *out = palloc(sizeof(float4KEY));

      *(int *) PG_GETARG_POINTER(1) = sizeof(float4KEY);
      PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo));
}


Datum
gbt_float4_penalty(PG_FUNCTION_ARGS)
{
      float4KEY  *origentry = (float4KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
      float4KEY  *newentry = (float4KEY *) 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_float4_picksplit(PG_FUNCTION_ARGS)
{
      PG_RETURN_POINTER(gbt_num_picksplit(
                                                      (GistEntryVector *) PG_GETARG_POINTER(0),
                                                        (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
                                                            &tinfo
                                                            ));
}

Datum
gbt_float4_same(PG_FUNCTION_ARGS)
{
      float4KEY  *b1 = (float4KEY *) PG_GETARG_POINTER(0);
      float4KEY  *b2 = (float4KEY *) 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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