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btree_macaddr.c

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

00009 typedef struct
{
      macaddr           lower;
      macaddr           upper;
} macKEY;

/*
** OID ops
*/
PG_FUNCTION_INFO_V1(gbt_macad_compress);
PG_FUNCTION_INFO_V1(gbt_macad_union);
PG_FUNCTION_INFO_V1(gbt_macad_picksplit);
PG_FUNCTION_INFO_V1(gbt_macad_consistent);
PG_FUNCTION_INFO_V1(gbt_macad_penalty);
PG_FUNCTION_INFO_V1(gbt_macad_same);

Datum       gbt_macad_compress(PG_FUNCTION_ARGS);
Datum       gbt_macad_union(PG_FUNCTION_ARGS);
Datum       gbt_macad_picksplit(PG_FUNCTION_ARGS);
Datum       gbt_macad_consistent(PG_FUNCTION_ARGS);
Datum       gbt_macad_penalty(PG_FUNCTION_ARGS);
Datum       gbt_macad_same(PG_FUNCTION_ARGS);


static bool
gbt_macadgt(const void *a, const void *b)
{
      return DatumGetBool(DirectFunctionCall2(macaddr_gt, PointerGetDatum(a), PointerGetDatum(b)));
}
static bool
gbt_macadge(const void *a, const void *b)
{
      return DatumGetBool(DirectFunctionCall2(macaddr_ge, PointerGetDatum(a), PointerGetDatum(b)));
}

static bool
gbt_macadeq(const void *a, const void *b)
{
      return DatumGetBool(DirectFunctionCall2(macaddr_eq, PointerGetDatum(a), PointerGetDatum(b)));
}

static bool
gbt_macadle(const void *a, const void *b)
{
      return DatumGetBool(DirectFunctionCall2(macaddr_le, PointerGetDatum(a), PointerGetDatum(b)));
}

static bool
gbt_macadlt(const void *a, const void *b)
{
      return DatumGetBool(DirectFunctionCall2(macaddr_lt, PointerGetDatum(a), PointerGetDatum(b)));
}


static int
gbt_macadkey_cmp(const void *a, const void *b)
{
      return DatumGetInt32(
                                     DirectFunctionCall2(
                                                                   macaddr_cmp,
                                                            PointerGetDatum(&((Nsrt *) a)->t[0]),
                                                             PointerGetDatum(&((Nsrt *) b)->t[0])
                                                                   )
            );
}


static const gbtree_ninfo tinfo =
{
      gbt_t_macad,
      sizeof(macaddr),
      gbt_macadgt,
      gbt_macadge,
      gbt_macadeq,
      gbt_macadle,
      gbt_macadlt,
      gbt_macadkey_cmp
};


/**************************************************
 * macaddr ops
 **************************************************/



static uint64
mac_2_uint64(macaddr *m)
{
      unsigned char *mi = (unsigned char *) m;
      uint64            res = 0;
      int               i;

      for (i = 0; i < 6; i++)
            res += (((uint64) mi[i]) << ((uint64) ((5 - i) * 8)));
      return res;
}



Datum
gbt_macad_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_macad_consistent(PG_FUNCTION_ARGS)
{
      GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
      macaddr    *query = (macaddr *) PG_GETARG_POINTER(1);
      StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);

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

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


Datum
gbt_macad_penalty(PG_FUNCTION_ARGS)
{
      macKEY         *origentry = (macKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
      macKEY         *newentry = (macKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
      float    *result = (float *) PG_GETARG_POINTER(2);
      uint64            iorg[2],
                        inew[2];

      iorg[0] = mac_2_uint64(&origentry->lower);
      iorg[1] = mac_2_uint64(&origentry->upper);
      inew[0] = mac_2_uint64(&newentry->lower);
      inew[1] = mac_2_uint64(&newentry->upper);

      penalty_num(result, iorg[0], iorg[1], inew[0], inew[1]);

      PG_RETURN_POINTER(result);

}

Datum
gbt_macad_picksplit(PG_FUNCTION_ARGS)
{
      PG_RETURN_POINTER(gbt_num_picksplit(
                                                      (GistEntryVector *) PG_GETARG_POINTER(0),
                                                        (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
                                                            &tinfo
                                                            ));
}

Datum
gbt_macad_same(PG_FUNCTION_ARGS)
{
      macKEY         *b1 = (macKEY *) PG_GETARG_POINTER(0);
      macKEY         *b2 = (macKEY *) 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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