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- Add aligment of variable data types

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- Add aligment for interval data types
- Avoid floating point overflow in penalty functions
Janko Richter <jankorichter@yahoo.de> and teodor
This commit is contained in:
Teodor Sigaev
2004-06-03 12:26:10 +00:00
parent 921d749bd4
commit 7b81988f9b
17 changed files with 161 additions and 110 deletions
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23
contrib/btree_gist/btree_macaddr.c
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@ -84,12 +84,12 @@ static const gbtree_ninfo tinfo =
static int64 mac_2_int64 ( macaddr * m ){
static uint64 mac_2_uint64 ( macaddr * m ){
unsigned char * mi = ( unsigned char * ) m;
int64 res = 0;
uint64 res = 0;
int i;
for (i=0; i<6; i++ ){
res += mi[i] << ( (5-i)*8 );
res += ( ( (uint64) mi[i] ) << ( (uint64) ( (5-i)*8 ) ) );
}
return res;
}
@ -108,6 +108,7 @@ gbt_macad_compress(PG_FUNCTION_ARGS)
Datum
gbt_macad_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
macaddr *query = (macaddr *) PG_GETARG_POINTER(1);
macKEY *kkk = (macKEY *) DatumGetPointer(entry->key);
@ -138,21 +139,21 @@ 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);
int64 iorg[2], inew[2], res ;
uint64 iorg[2], inew[2];
uint64 res;
iorg[0] = mac_2_int64 ( &origentry->lower );
iorg[1] = mac_2_int64 ( &origentry->upper );
inew[0] = mac_2_int64 ( &newentry->lower );
inew[1] = mac_2_int64 ( &newentry->upper );
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 );
res = Max(inew[1] - iorg[1], 0) +
Max(iorg[0] - inew[0] , 0);
penalty_range_enlarge ( iorg[0], iorg[1], inew[0], inew[1] );
*result = 0.0;
if ( res > 0 ){
*result += FLT_MIN ;
*result += (float) ( res / ( (double) ( res + iorg[1] - iorg[0] ) ) );
*result += (float) ( ( (double)res ) / ( (double)res + (double)iorg[1] - (double)iorg[0] ) );
*result *= ( FLT_MAX / ( ( (GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1 ) );
}