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- Add aligment for interval data types - Avoid floating point overflow in penalty functions Janko Richter <jankorichter@yahoo.de> and teodor
185 lines
4.8 KiB
C
185 lines
4.8 KiB
C
#include "btree_gist.h"
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#include "btree_utils_num.h"
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#include "utils/builtins.h"
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#include "utils/inet.h"
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typedef struct
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{
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macaddr lower;
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macaddr upper;
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} macKEY;
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/*
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** OID ops
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*/
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PG_FUNCTION_INFO_V1(gbt_macad_compress);
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PG_FUNCTION_INFO_V1(gbt_macad_union);
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PG_FUNCTION_INFO_V1(gbt_macad_picksplit);
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PG_FUNCTION_INFO_V1(gbt_macad_consistent);
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PG_FUNCTION_INFO_V1(gbt_macad_penalty);
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PG_FUNCTION_INFO_V1(gbt_macad_same);
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Datum gbt_macad_compress(PG_FUNCTION_ARGS);
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Datum gbt_macad_union(PG_FUNCTION_ARGS);
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Datum gbt_macad_picksplit(PG_FUNCTION_ARGS);
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Datum gbt_macad_consistent(PG_FUNCTION_ARGS);
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Datum gbt_macad_penalty(PG_FUNCTION_ARGS);
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Datum gbt_macad_same(PG_FUNCTION_ARGS);
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static bool gbt_macadgt (const void *a, const void *b)
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{
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return DatumGetBool(DirectFunctionCall2(macaddr_gt,PointerGetDatum(a),PointerGetDatum(b)));
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}
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static bool gbt_macadge (const void *a, const void *b)
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{
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return DatumGetBool(DirectFunctionCall2(macaddr_ge,PointerGetDatum(a),PointerGetDatum(b)));
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}
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static bool gbt_macadeq (const void *a, const void *b)
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{
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return DatumGetBool(DirectFunctionCall2(macaddr_eq,PointerGetDatum(a),PointerGetDatum(b)));
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}
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static bool gbt_macadle (const void *a, const void *b)
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{
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return DatumGetBool(DirectFunctionCall2(macaddr_le,PointerGetDatum(a),PointerGetDatum(b)));
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}
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static bool gbt_macadlt (const void *a, const void *b)
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{
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return DatumGetBool(DirectFunctionCall2(macaddr_lt,PointerGetDatum(a),PointerGetDatum(b)));
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}
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static int
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gbt_macadkey_cmp(const void *a, const void *b)
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{
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return DatumGetInt32(
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DirectFunctionCall2(
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macaddr_cmp ,
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PointerGetDatum (&((Nsrt *) a)->t[0]),
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PointerGetDatum (&((Nsrt *) b)->t[0])
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)
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);
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}
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static const gbtree_ninfo tinfo =
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{
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gbt_t_macad,
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sizeof(macaddr),
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gbt_macadgt,
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gbt_macadge,
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gbt_macadeq,
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gbt_macadle,
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gbt_macadlt,
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gbt_macadkey_cmp
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};
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/**************************************************
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* macaddr ops
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**************************************************/
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static uint64 mac_2_uint64 ( macaddr * m ){
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unsigned char * mi = ( unsigned char * ) m;
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uint64 res = 0;
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int i;
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for (i=0; i<6; i++ ){
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res += ( ( (uint64) mi[i] ) << ( (uint64) ( (5-i)*8 ) ) );
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}
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return res;
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}
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Datum
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gbt_macad_compress(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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GISTENTRY *retval = NULL;
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PG_RETURN_POINTER( gbt_num_compress( retval , entry , &tinfo ));
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}
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Datum
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gbt_macad_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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macaddr *query = (macaddr *) PG_GETARG_POINTER(1);
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macKEY *kkk = (macKEY *) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key ;
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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key.lower = (GBT_NUMKEY*) &kkk->lower ;
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key.upper = (GBT_NUMKEY*) &kkk->upper ;
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PG_RETURN_BOOL(
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gbt_num_consistent( &key, (void*)query,&strategy,GIST_LEAF(entry),&tinfo)
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);
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}
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Datum
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gbt_macad_union(PG_FUNCTION_ARGS)
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{
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GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
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void *out = palloc(sizeof(macKEY));
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*(int *) PG_GETARG_POINTER(1) = sizeof(macKEY);
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PG_RETURN_POINTER( gbt_num_union ( (void*)out, entryvec, &tinfo ) );
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}
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Datum
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gbt_macad_penalty(PG_FUNCTION_ARGS)
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{
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macKEY *origentry = (macKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
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macKEY *newentry = (macKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
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float *result = (float *) PG_GETARG_POINTER(2);
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uint64 iorg[2], inew[2];
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uint64 res;
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iorg[0] = mac_2_uint64 ( &origentry->lower );
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iorg[1] = mac_2_uint64 ( &origentry->upper );
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inew[0] = mac_2_uint64 ( &newentry->lower );
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inew[1] = mac_2_uint64 ( &newentry->upper );
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penalty_range_enlarge ( iorg[0], iorg[1], inew[0], inew[1] );
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*result = 0.0;
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if ( res > 0 ){
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*result += FLT_MIN ;
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*result += (float) ( ( (double)res ) / ( (double)res + (double)iorg[1] - (double)iorg[0] ) );
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*result *= ( FLT_MAX / ( ( (GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1 ) );
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}
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PG_RETURN_POINTER(result);
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}
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Datum
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gbt_macad_picksplit(PG_FUNCTION_ARGS)
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{
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PG_RETURN_POINTER(gbt_num_picksplit(
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(GistEntryVector *) PG_GETARG_POINTER(0),
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(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
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&tinfo
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));
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}
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Datum
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gbt_macad_same(PG_FUNCTION_ARGS)
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{
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macKEY *b1 = (macKEY *) PG_GETARG_POINTER(0);
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macKEY *b2 = (macKEY *) PG_GETARG_POINTER(1);
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bool *result = (bool *) PG_GETARG_POINTER(2);
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*result = gbt_num_same ( (void*)b1, (void*)b2, &tinfo );
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PG_RETURN_POINTER(result);
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}
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