postgresql/contrib/btree_gist/btree_bytea.c

#include "btree_gist.h"
#include "btree_utils_var.h"
#include "utils/builtins.h"


/*
** Bytea ops
*/
PG_FUNCTION_INFO_V1(gbt_bytea_compress);
PG_FUNCTION_INFO_V1(gbt_bytea_union);
PG_FUNCTION_INFO_V1(gbt_bytea_picksplit);
PG_FUNCTION_INFO_V1(gbt_bytea_consistent);
PG_FUNCTION_INFO_V1(gbt_bytea_penalty);
PG_FUNCTION_INFO_V1(gbt_bytea_same);

Datum    gbt_bytea_compress(PG_FUNCTION_ARGS);
Datum    gbt_bytea_union(PG_FUNCTION_ARGS);
Datum    gbt_bytea_picksplit(PG_FUNCTION_ARGS);
Datum    gbt_bytea_consistent(PG_FUNCTION_ARGS);
Datum    gbt_bytea_penalty(PG_FUNCTION_ARGS);
Datum    gbt_bytea_same(PG_FUNCTION_ARGS);


/* define for comparison */

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

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

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

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

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

static int32 gbt_byteacmp ( const bytea * a , const bytea * b )
{
  return 
    ( DatumGetInt32(DirectFunctionCall2(byteacmp,PointerGetDatum(a),PointerGetDatum(b) ) ) );
}


static const gbtree_vinfo tinfo =
{
  gbt_t_bytea,
  FALSE,
  TRUE,
  gbt_byteagt,
  gbt_byteage,
  gbt_byteaeq,
  gbt_byteale,
  gbt_bytealt,
  gbt_byteacmp,
  NULL
};


/**************************************************
 * Text ops
 **************************************************/


Datum
gbt_bytea_compress (PG_FUNCTION_ARGS)
{
  GISTENTRY        *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
  PG_RETURN_POINTER ( gbt_var_compress( entry, &tinfo ) );
}



Datum
gbt_bytea_consistent(PG_FUNCTION_ARGS)
{
  GISTENTRY        *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
  GBT_VARKEY       *ktst  = (GBT_VARKEY   *) DatumGetPointer ( entry->key ) ;
  GBT_VARKEY        *key  = (GBT_VARKEY   *) DatumGetPointer ( PG_DETOAST_DATUM( entry->key ) );
  void             *qtst  = ( void * ) DatumGetPointer( PG_GETARG_DATUM(1) );
  void            *query  = ( void * ) DatumGetByteaP ( PG_GETARG_DATUM(1) );
  StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
  bool    retval          = FALSE;
  GBT_VARKEY_R          r =  gbt_var_key_readable ( key );

  retval = gbt_var_consistent( &r, query, &strategy, GIST_LEAF(entry), &tinfo );

  if ( ktst != key ){
    pfree ( key );
  }
  if ( qtst != query ){
    pfree ( query );
  }
  PG_RETURN_BOOL(retval);
}



Datum
gbt_bytea_union(PG_FUNCTION_ARGS)
{
    GistEntryVector  * entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
    int32            * size     = (int *)   PG_GETARG_POINTER(1);
    PG_RETURN_POINTER( gbt_var_union ( entryvec , size , &tinfo ) );
}
 

Datum
gbt_bytea_picksplit(PG_FUNCTION_ARGS)
{
    GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
    GIST_SPLITVEC          *v = (GIST_SPLITVEC *) PG_GETARG_POINTER(1);
    gbt_var_picksplit ( entryvec, v, &tinfo );
    PG_RETURN_POINTER(v);
}

Datum
gbt_bytea_same(PG_FUNCTION_ARGS)
{
    Datum d1 = PG_GETARG_DATUM(0);
    Datum d2 = PG_GETARG_DATUM(1);
    bool       *result = (bool *) PG_GETARG_POINTER(2);
    PG_RETURN_POINTER( gbt_var_same ( result, d1 , d2 , &tinfo ));
}


Datum
gbt_bytea_penalty(PG_FUNCTION_ARGS)
{
    float      *result   = (float *)     PG_GETARG_POINTER(2);
    GISTENTRY *      o   = (GISTENTRY *) PG_GETARG_POINTER(0);
    GISTENTRY *      n   = (GISTENTRY *) PG_GETARG_POINTER(1);
    PG_RETURN_POINTER( gbt_var_penalty ( result ,o , n, &tinfo ) );
}