Ejemplo n.º 1
0
/* Append sorted list b to sorted list a. The result is unsorted but
 * a[1] is the min of the result and a[a[0]] is the max.
 */
int mdb_idl_append( ID *a, ID *b )
{
	ID ida, idb, tmp, swap = 0;

	if ( MDB_IDL_IS_ZERO( b ) ) {
		return 0;
	}

	if ( MDB_IDL_IS_ZERO( a ) ) {
		MDB_IDL_CPY( a, b );
		return 0;
	}

	ida = MDB_IDL_LAST( a );
	idb = MDB_IDL_LAST( b );
	if ( MDB_IDL_IS_RANGE( a ) || MDB_IDL_IS_RANGE(b) ||
		a[0] + b[0] >= MDB_IDL_UM_MAX ) {
		a[2] = IDL_MAX( ida, idb );
		a[1] = IDL_MIN( a[1], b[1] );
		a[0] = NOID;
		return 0;
	}

	if ( b[0] > 1 && ida > idb ) {
		swap = idb;
		a[a[0]] = idb;
		b[b[0]] = ida;
	}

	if ( b[1] < a[1] ) {
		tmp = a[1];
		a[1] = b[1];
	} else {
		tmp = b[1];
	}
	a[0]++;
	a[a[0]] = tmp;

	if ( b[0] > 1 ) {
		int i = b[0] - 1;
		AC_MEMCPY(a+a[0]+1, b+2, i * sizeof(ID));
		a[0] += i;
	}
	if ( swap ) {
		b[b[0]] = swap;
	}
	return 0;
}
Ejemplo n.º 2
0
/*
 * mdb_idl_notin - return a intersection ~b (or a minus b)
 */
int
mdb_idl_notin(
	ID	*a,
	ID	*b,
	ID *ids )
{
	ID ida, idb;
	ID cursora = 0, cursorb = 0;

	if( MDB_IDL_IS_ZERO( a ) ||
		MDB_IDL_IS_ZERO( b ) ||
		MDB_IDL_IS_RANGE( b ) )
	{
		MDB_IDL_CPY( ids, a );
		return 0;
	}

	if( MDB_IDL_IS_RANGE( a ) ) {
		MDB_IDL_CPY( ids, a );
		return 0;
	}

	ida = mdb_idl_first( a, &cursora ),
	idb = mdb_idl_first( b, &cursorb );

	ids[0] = 0;

	while( ida != NOID ) {
		if ( idb == NOID ) {
			/* we could shortcut this */
			ids[++ids[0]] = ida;
			ida = mdb_idl_next( a, &cursora );

		} else if ( ida < idb ) {
			ids[++ids[0]] = ida;
			ida = mdb_idl_next( a, &cursora );

		} else if ( ida > idb ) {
			idb = mdb_idl_next( b, &cursorb );

		} else {
			ida = mdb_idl_next( a, &cursora );
			idb = mdb_idl_next( b, &cursorb );
		}
	}

	return 0;
}
Ejemplo n.º 3
0
static int
substring_candidates(
	Operation *op,
	MDB_txn *rtxn,
	SubstringsAssertion	*sub,
	ID *ids,
	ID *tmp )
{
	MDB_dbi	dbi;
	int i;
	int rc;
	slap_mask_t mask;
	struct berval prefix = {0, NULL};
	struct berval *keys = NULL;
	MatchingRule *mr;

	Debug( LDAP_DEBUG_TRACE, "=> mdb_substring_candidates (%s)\n",
			sub->sa_desc->ad_cname.bv_val, 0, 0 );

	MDB_IDL_ALL( ids );

	rc = mdb_index_param( op->o_bd, sub->sa_desc, LDAP_FILTER_SUBSTRINGS,
		&dbi, &mask, &prefix );

	if ( rc == LDAP_INAPPROPRIATE_MATCHING ) {
		Debug( LDAP_DEBUG_ANY,
			"<= mdb_substring_candidates: (%s) not indexed\n",
			sub->sa_desc->ad_cname.bv_val, 0, 0 );
		return 0;
	}

	if( rc != LDAP_SUCCESS ) {
		Debug( LDAP_DEBUG_ANY,
			"<= mdb_substring_candidates: (%s) "
			"index_param failed (%d)\n",
			sub->sa_desc->ad_cname.bv_val, rc, 0 );
		return 0;
	}

	mr = sub->sa_desc->ad_type->sat_substr;

	if( !mr ) {
		return 0;
	}

	if( !mr->smr_filter ) {
		return 0;
	}

	rc = (mr->smr_filter)(
		LDAP_FILTER_SUBSTRINGS,
		mask,
		sub->sa_desc->ad_type->sat_syntax,
		mr,
		&prefix,
		sub,
		&keys, op->o_tmpmemctx );

	if( rc != LDAP_SUCCESS ) {
		Debug( LDAP_DEBUG_TRACE,
			"<= mdb_substring_candidates: (%s) "
			"MR filter failed (%d)\n",
			sub->sa_desc->ad_cname.bv_val, rc, 0 );
		return 0;
	}

	if( keys == NULL ) {
		Debug( LDAP_DEBUG_TRACE,
			"<= mdb_substring_candidates: (0x%04lx) no keys (%s)\n",
			mask, sub->sa_desc->ad_cname.bv_val, 0 );
		return 0;
	}

	for ( i= 0; keys[i].bv_val != NULL; i++ ) {
		rc = mdb_key_read( op->o_bd, rtxn, dbi, &keys[i], tmp, NULL, 0 );

		if( rc == MDB_NOTFOUND ) {
			MDB_IDL_ZERO( ids );
			rc = 0;
			break;
		} else if( rc != LDAP_SUCCESS ) {
			Debug( LDAP_DEBUG_TRACE,
				"<= mdb_substring_candidates: (%s) "
				"key read failed (%d)\n",
				sub->sa_desc->ad_cname.bv_val, rc, 0 );
			break;
		}

		if( MDB_IDL_IS_ZERO( tmp ) ) {
			Debug( LDAP_DEBUG_TRACE,
				"<= mdb_substring_candidates: (%s) NULL\n",
				sub->sa_desc->ad_cname.bv_val, 0, 0 );
			MDB_IDL_ZERO( ids );
			break;
		}

		if ( i == 0 ) {
			MDB_IDL_CPY( ids, tmp );
		} else {
			mdb_idl_intersection( ids, tmp );
		}

		if( MDB_IDL_IS_ZERO( ids ) )
			break;
	}

	ber_bvarray_free_x( keys, op->o_tmpmemctx );

	Debug( LDAP_DEBUG_TRACE, "<= mdb_substring_candidates: %ld, first=%ld, last=%ld\n",
		(long) ids[0],
		(long) MDB_IDL_FIRST(ids),
		(long) MDB_IDL_LAST(ids) );
	return( rc );
}
Ejemplo n.º 4
0
static int
equality_candidates(
	Operation *op,
	MDB_txn *rtxn,
	AttributeAssertion *ava,
	ID *ids,
	ID *tmp )
{
	MDB_dbi	dbi;
	int i;
	int rc;
	slap_mask_t mask;
	struct berval prefix = {0, NULL};
	struct berval *keys = NULL;
	MatchingRule *mr;

	Debug( LDAP_DEBUG_TRACE, "=> mdb_equality_candidates (%s)\n",
			ava->aa_desc->ad_cname.bv_val, 0, 0 );

	if ( ava->aa_desc == slap_schema.si_ad_entryDN ) {
		ID id;
		rc = mdb_dn2id( op, rtxn, NULL, &ava->aa_value, &id, NULL, NULL, NULL );
		if ( rc == LDAP_SUCCESS ) {
			/* exactly one ID can match */
			ids[0] = 1;
			ids[1] = id;
		}
		if ( rc == MDB_NOTFOUND ) {
			MDB_IDL_ZERO( ids );
			rc = 0;
		}
		return rc;
	}

	MDB_IDL_ALL( ids );

	rc = mdb_index_param( op->o_bd, ava->aa_desc, LDAP_FILTER_EQUALITY,
		&dbi, &mask, &prefix );

	if ( rc == LDAP_INAPPROPRIATE_MATCHING ) {
		Debug( LDAP_DEBUG_ANY,
			"<= mdb_equality_candidates: (%s) not indexed\n", 
			ava->aa_desc->ad_cname.bv_val, 0, 0 );
		return 0;
	}

	if( rc != LDAP_SUCCESS ) {
		Debug( LDAP_DEBUG_ANY,
			"<= mdb_equality_candidates: (%s) "
			"index_param failed (%d)\n",
			ava->aa_desc->ad_cname.bv_val, rc, 0 );
		return 0;
	}

	mr = ava->aa_desc->ad_type->sat_equality;
	if( !mr ) {
		return 0;
	}

	if( !mr->smr_filter ) {
		return 0;
	}

	rc = (mr->smr_filter)(
		LDAP_FILTER_EQUALITY,
		mask,
		ava->aa_desc->ad_type->sat_syntax,
		mr,
		&prefix,
		&ava->aa_value,
		&keys, op->o_tmpmemctx );

	if( rc != LDAP_SUCCESS ) {
		Debug( LDAP_DEBUG_TRACE,
			"<= mdb_equality_candidates: (%s, %s) "
			"MR filter failed (%d)\n",
			prefix.bv_val, ava->aa_desc->ad_cname.bv_val, rc );
		return 0;
	}

	if( keys == NULL ) {
		Debug( LDAP_DEBUG_TRACE,
			"<= mdb_equality_candidates: (%s) no keys\n",
			ava->aa_desc->ad_cname.bv_val, 0, 0 );
		return 0;
	}

	for ( i= 0; keys[i].bv_val != NULL; i++ ) {
		rc = mdb_key_read( op->o_bd, rtxn, dbi, &keys[i], tmp, NULL, 0 );

		if( rc == MDB_NOTFOUND ) {
			MDB_IDL_ZERO( ids );
			rc = 0;
			break;
		} else if( rc != LDAP_SUCCESS ) {
			Debug( LDAP_DEBUG_TRACE,
				"<= mdb_equality_candidates: (%s) "
				"key read failed (%d)\n",
				ava->aa_desc->ad_cname.bv_val, rc, 0 );
			break;
		}

		if( MDB_IDL_IS_ZERO( tmp ) ) {
			Debug( LDAP_DEBUG_TRACE,
				"<= mdb_equality_candidates: (%s) NULL\n", 
				ava->aa_desc->ad_cname.bv_val, 0, 0 );
			MDB_IDL_ZERO( ids );
			break;
		}

		if ( i == 0 ) {
			MDB_IDL_CPY( ids, tmp );
		} else {
			mdb_idl_intersection( ids, tmp );
		}

		if( MDB_IDL_IS_ZERO( ids ) )
			break;
	}

	ber_bvarray_free_x( keys, op->o_tmpmemctx );

	Debug( LDAP_DEBUG_TRACE,
		"<= mdb_equality_candidates: id=%ld, first=%ld, last=%ld\n",
		(long) ids[0],
		(long) MDB_IDL_FIRST(ids),
		(long) MDB_IDL_LAST(ids) );
	return( rc );
}
Ejemplo n.º 5
0
static int
list_candidates(
	Operation *op,
	MDB_txn *rtxn,
	Filter	*flist,
	int		ftype,
	ID *ids,
	ID *tmp,
	ID *save )
{
	int rc = 0;
	Filter	*f;

	Debug( LDAP_DEBUG_FILTER, "=> mdb_list_candidates 0x%x\n", ftype, 0, 0 );
	for ( f = flist; f != NULL; f = f->f_next ) {
		/* ignore precomputed scopes */
		if ( f->f_choice == SLAPD_FILTER_COMPUTED &&
		     f->f_result == LDAP_SUCCESS ) {
			continue;
		}
		MDB_IDL_ZERO( save );
		rc = mdb_filter_candidates( op, rtxn, f, save, tmp,
			save+MDB_IDL_UM_SIZE );

		if ( rc != 0 ) {
			if ( ftype == LDAP_FILTER_AND ) {
				rc = 0;
				continue;
			}
			break;
		}

		
		if ( ftype == LDAP_FILTER_AND ) {
			if ( f == flist ) {
				MDB_IDL_CPY( ids, save );
			} else {
				mdb_idl_intersection( ids, save );
			}
			if( MDB_IDL_IS_ZERO( ids ) )
				break;
		} else {
			if ( f == flist ) {
				MDB_IDL_CPY( ids, save );
			} else {
				mdb_idl_union( ids, save );
			}
		}
	}

	if( rc == LDAP_SUCCESS ) {
		Debug( LDAP_DEBUG_FILTER,
			"<= mdb_list_candidates: id=%ld first=%ld last=%ld\n",
			(long) ids[0],
			(long) MDB_IDL_FIRST(ids),
			(long) MDB_IDL_LAST(ids) );

	} else {
		Debug( LDAP_DEBUG_FILTER,
			"<= mdb_list_candidates: undefined rc=%d\n",
			rc, 0, 0 );
	}

	return rc;
}
Ejemplo n.º 6
0
static int
comp_equality_candidates (
	Operation *op,
	MDB_txn *rtxn,
	MatchingRuleAssertion *mra,
	ComponentAssertion *ca,
	ID *ids,
	ID *tmp,
	ID *stack)
{
	MDB_dbi	  dbi;
	int i;
	int rc;
	slap_mask_t mask;
	struct berval prefix = {0, NULL};
	struct berval *keys = NULL;
	MatchingRule *mr = mra->ma_rule;
	Syntax *sat_syntax;
	ComponentReference* cr_list, *cr;
	AttrInfo *ai;

	MDB_IDL_ALL( ids );

	if ( !ca->ca_comp_ref )
		return 0;

	ai = mdb_attr_mask( op->o_bd->be_private, mra->ma_desc );
	if( ai ) {
		cr_list = ai->ai_cr;
	}
	else {
		return 0;
	}
	/* find a component reference to be indexed */
	sat_syntax = ca->ca_ma_rule->smr_syntax;
	for ( cr = cr_list ; cr ; cr = cr->cr_next ) {
		if ( cr->cr_string.bv_len == ca->ca_comp_ref->cr_string.bv_len &&
			strncmp( cr->cr_string.bv_val, ca->ca_comp_ref->cr_string.bv_val,cr->cr_string.bv_len ) == 0 )
			break;
	}
	
	if ( !cr )
		return 0;

	rc = mdb_index_param( op->o_bd, mra->ma_desc, LDAP_FILTER_EQUALITY,
			&dbi, &mask, &prefix );

	if( rc != LDAP_SUCCESS ) {
		return 0;
	}

	if( !mr ) {
		return 0;
	}

	if( !mr->smr_filter ) {
		return 0;
	}

	rc = (ca->ca_ma_rule->smr_filter)(
				LDAP_FILTER_EQUALITY,
				cr->cr_indexmask,
				sat_syntax,
				ca->ca_ma_rule,
				&prefix,
				&ca->ca_ma_value,
				&keys, op->o_tmpmemctx );

	if( rc != LDAP_SUCCESS ) {
		return 0;
	}

	if( keys == NULL ) {
		return 0;
	}
	for ( i= 0; keys[i].bv_val != NULL; i++ ) {
		rc = mdb_key_read( op->o_bd, rtxn, dbi, &keys[i], tmp, NULL, 0 );

		if( rc == MDB_NOTFOUND ) {
			MDB_IDL_ZERO( ids );
			rc = 0;
			break;
		} else if( rc != LDAP_SUCCESS ) {
			break;
		}

		if( MDB_IDL_IS_ZERO( tmp ) ) {
			MDB_IDL_ZERO( ids );
			break;
		}

		if ( i == 0 ) {
			MDB_IDL_CPY( ids, tmp );
		} else {
			mdb_idl_intersection( ids, tmp );
		}

		if( MDB_IDL_IS_ZERO( ids ) )
			break;
	}
	ber_bvarray_free_x( keys, op->o_tmpmemctx );

	Debug( LDAP_DEBUG_TRACE,
			"<= comp_equality_candidates: id=%ld, first=%ld, last=%ld\n",
			(long) ids[0],
			(long) MDB_IDL_FIRST(ids),
			(long) MDB_IDL_LAST(ids) );
	return( rc );
}
Ejemplo n.º 7
0
static int
inequality_candidates(
	Operation *op,
	MDB_txn *rtxn,
	AttributeAssertion *ava,
	ID *ids,
	ID *tmp,
	int gtorlt )
{
	MDB_dbi	dbi;
	int rc;
	slap_mask_t mask;
	struct berval prefix = {0, NULL};
	struct berval *keys = NULL;
	MatchingRule *mr;
	MDB_cursor *cursor = NULL;

	Debug( LDAP_DEBUG_TRACE, "=> mdb_inequality_candidates (%s)\n",
			ava->aa_desc->ad_cname.bv_val, 0, 0 );

	MDB_IDL_ALL( ids );

	rc = mdb_index_param( op->o_bd, ava->aa_desc, LDAP_FILTER_EQUALITY,
		&dbi, &mask, &prefix );

	if ( rc == LDAP_INAPPROPRIATE_MATCHING ) {
		Debug( LDAP_DEBUG_ANY,
			"<= mdb_inequality_candidates: (%s) not indexed\n", 
			ava->aa_desc->ad_cname.bv_val, 0, 0 );
		return 0;
	}

	if( rc != LDAP_SUCCESS ) {
		Debug( LDAP_DEBUG_ANY,
			"<= mdb_inequality_candidates: (%s) "
			"index_param failed (%d)\n",
			ava->aa_desc->ad_cname.bv_val, rc, 0 );
		return 0;
	}

	mr = ava->aa_desc->ad_type->sat_equality;
	if( !mr ) {
		return 0;
	}

	if( !mr->smr_filter ) {
		return 0;
	}

	rc = (mr->smr_filter)(
		LDAP_FILTER_EQUALITY,
		mask,
		ava->aa_desc->ad_type->sat_syntax,
		mr,
		&prefix,
		&ava->aa_value,
		&keys, op->o_tmpmemctx );

	if( rc != LDAP_SUCCESS ) {
		Debug( LDAP_DEBUG_TRACE,
			"<= mdb_inequality_candidates: (%s, %s) "
			"MR filter failed (%d)\n",
			prefix.bv_val, ava->aa_desc->ad_cname.bv_val, rc );
		return 0;
	}

	if( keys == NULL ) {
		Debug( LDAP_DEBUG_TRACE,
			"<= mdb_inequality_candidates: (%s) no keys\n",
			ava->aa_desc->ad_cname.bv_val, 0, 0 );
		return 0;
	}

	MDB_IDL_ZERO( ids );
	while(1) {
		rc = mdb_key_read( op->o_bd, rtxn, dbi, &keys[0], tmp, &cursor, gtorlt );

		if( rc == MDB_NOTFOUND ) {
			rc = 0;
			break;
		} else if( rc != LDAP_SUCCESS ) {
			Debug( LDAP_DEBUG_TRACE,
			       "<= mdb_inequality_candidates: (%s) "
			       "key read failed (%d)\n",
			       ava->aa_desc->ad_cname.bv_val, rc, 0 );
			break;
		}

		if( MDB_IDL_IS_ZERO( tmp ) ) {
			Debug( LDAP_DEBUG_TRACE,
			       "<= mdb_inequality_candidates: (%s) NULL\n", 
			       ava->aa_desc->ad_cname.bv_val, 0, 0 );
			break;
		}

		mdb_idl_union( ids, tmp );

		if( op->ors_limit && op->ors_limit->lms_s_unchecked != -1 &&
			MDB_IDL_N( ids ) >= (unsigned) op->ors_limit->lms_s_unchecked ) {
			mdb_cursor_close( cursor );
			break;
		}
	}
	ber_bvarray_free_x( keys, op->o_tmpmemctx );

	Debug( LDAP_DEBUG_TRACE,
		"<= mdb_inequality_candidates: id=%ld, first=%ld, last=%ld\n",
		(long) ids[0],
		(long) MDB_IDL_FIRST(ids),
		(long) MDB_IDL_LAST(ids) );
	return( rc );
}
Ejemplo n.º 8
0
/* Look for and dereference all aliases within the search scope.
 * Requires "stack" to be able to hold 6 levels of DB_SIZE IDLs.
 * Of course we're hardcoded to require a minimum of 8 UM_SIZE
 * IDLs so this is never a problem.
 */
static int search_aliases(
	Operation *op,
	SlapReply *rs,
	ID e_id,
	IdScopes *isc,
	MDB_cursor *mci,
	ID *stack )
{
	ID *aliases, *curscop, *visited, *newsubs, *oldsubs, *tmp;
	ID cursora, ida, cursoro, ido;
	Entry *matched, *a;
	struct berval bv_alias = BER_BVC( "alias" );
	AttributeAssertion aa_alias = ATTRIBUTEASSERTION_INIT;
	Filter	af;
	int first = 1;

	aliases = stack;	/* IDL of all aliases in the database */
	curscop = aliases + MDB_IDL_DB_SIZE;	/* Aliases in the current scope */
	visited = curscop + MDB_IDL_DB_SIZE;	/* IDs we've seen in this search */
	newsubs = visited + MDB_IDL_DB_SIZE;	/* New subtrees we've added */
	oldsubs = newsubs + MDB_IDL_DB_SIZE;	/* Subtrees added previously */
	tmp = oldsubs + MDB_IDL_DB_SIZE;	/* Scratch space for deref_base() */

	af.f_choice = LDAP_FILTER_EQUALITY;
	af.f_ava = &aa_alias;
	af.f_av_desc = slap_schema.si_ad_objectClass;
	af.f_av_value = bv_alias;
	af.f_next = NULL;

	/* Find all aliases in database */
	MDB_IDL_ZERO( aliases );
	rs->sr_err = mdb_filter_candidates( op, isc->mt, &af, aliases,
		curscop, visited );
	if (rs->sr_err != LDAP_SUCCESS || MDB_IDL_IS_ZERO( aliases )) {
		return rs->sr_err;
	}
	oldsubs[0] = 1;
	oldsubs[1] = e_id;

	MDB_IDL_ZERO( visited );
	MDB_IDL_ZERO( newsubs );

	cursoro = 0;
	ido = mdb_idl_first( oldsubs, &cursoro );

	for (;;) {
		/* Set curscop to only the aliases in the current scope. Start with
		 * all the aliases, then get the intersection with the scope.
		 */
		rs->sr_err = mdb_idscope( op, isc->mt, e_id, aliases, curscop );

		/* Dereference all of the aliases in the current scope. */
		cursora = 0;
		for (ida = mdb_idl_first(curscop, &cursora); ida != NOID;
			ida = mdb_idl_next(curscop, &cursora))
		{
			rs->sr_err = mdb_id2entry(op, mci, ida, &a);
			if (rs->sr_err != LDAP_SUCCESS) {
				continue;
			}

			/* This should only happen if the curscop IDL has maxed out and
			 * turned into a range that spans IDs indiscriminately
			 */
			if (!is_entry_alias(a)) {
				mdb_entry_return(op, a);
				continue;
			}

			/* Actually dereference the alias */
			MDB_IDL_ZERO(tmp);
			a = deref_base( op, rs, a, &matched, isc->mt,
				tmp, visited );
			if (a) {
				/* If the target was not already in our current scopes,
				 * make note of it in the newsubs list.
				 */
				ID2 mid;
				mid.mid = a->e_id;
				mid.mval.mv_data = NULL;
				if (op->ors_scope == LDAP_SCOPE_SUBTREE) {
					isc->id = a->e_id;
					/* if ID is a child of any of our current scopes,
					 * ignore it, it's already included.
					 */
					if (mdb_idscopechk(op, isc))
						goto skip;
				}
				if (mdb_id2l_insert(isc->scopes, &mid) == 0) {
					mdb_idl_insert(newsubs, a->e_id);
				}
skip:			mdb_entry_return( op, a );

			} else if (matched) {
				/* Alias could not be dereferenced, or it deref'd to
				 * an ID we've already seen. Ignore it.
				 */
				mdb_entry_return( op, matched );
				rs->sr_text = NULL;
				rs->sr_err = 0;
			}
		}
		/* If this is a OneLevel search, we're done; oldsubs only had one
		 * ID in it. For a Subtree search, oldsubs may be a list of scope IDs.
		 */
		if ( op->ors_scope == LDAP_SCOPE_ONELEVEL ) break;
nextido:
		ido = mdb_idl_next( oldsubs, &cursoro );
		
		/* If we're done processing the old scopes, did we add any new
		 * scopes in this iteration? If so, go back and do those now.
		 */
		if (ido == NOID) {
			if (MDB_IDL_IS_ZERO(newsubs)) break;
			MDB_IDL_CPY(oldsubs, newsubs);
			MDB_IDL_ZERO(newsubs);
			cursoro = 0;
			ido = mdb_idl_first( oldsubs, &cursoro );
		}

		/* Find the entry corresponding to the next scope. If it can't
		 * be found, ignore it and move on. This should never happen;
		 * we should never see the ID of an entry that doesn't exist.
		 */
		{
			MDB_val edata;
			rs->sr_err = mdb_id2edata(op, mci, ido, &edata);
			if ( rs->sr_err != MDB_SUCCESS ) {
				goto nextido;
			}
			e_id = ido;
		}
	}
	return rs->sr_err;
}
Ejemplo n.º 9
0
/*
 * idl_union - return a = a union b
 */
int
mdb_idl_union(
	ID	*a,
	ID	*b )
{
	ID ida, idb;
	ID cursora = 0, cursorb = 0, cursorc;

	if ( MDB_IDL_IS_ZERO( b ) ) {
		return 0;
	}

	if ( MDB_IDL_IS_ZERO( a ) ) {
		MDB_IDL_CPY( a, b );
		return 0;
	}

	if ( MDB_IDL_IS_RANGE( a ) || MDB_IDL_IS_RANGE(b) ) {
over:		ida = IDL_MIN( MDB_IDL_FIRST(a), MDB_IDL_FIRST(b) );
		idb = IDL_MAX( MDB_IDL_LAST(a), MDB_IDL_LAST(b) );
		a[0] = NOID;
		a[1] = ida;
		a[2] = idb;
		return 0;
	}

	ida = mdb_idl_first( a, &cursora );
	idb = mdb_idl_first( b, &cursorb );

	cursorc = b[0];

	/* The distinct elements of a are cat'd to b */
	while( ida != NOID || idb != NOID ) {
		if ( ida < idb ) {
			if( ++cursorc > MDB_IDL_UM_MAX ) {
				goto over;
			}
			b[cursorc] = ida;
			ida = mdb_idl_next( a, &cursora );

		} else {
			if ( ida == idb )
				ida = mdb_idl_next( a, &cursora );
			idb = mdb_idl_next( b, &cursorb );
		}
	}

	/* b is copied back to a in sorted order */
	a[0] = cursorc;
	cursora = 1;
	cursorb = 1;
	cursorc = b[0]+1;
	while (cursorb <= b[0] || cursorc <= a[0]) {
		if (cursorc > a[0])
			idb = NOID;
		else
			idb = b[cursorc];
		if (cursorb <= b[0] && b[cursorb] < idb)
			a[cursora++] = b[cursorb++];
		else {
			a[cursora++] = idb;
			cursorc++;
		}
	}

	return 0;
}
Ejemplo n.º 10
0
/*
 * idl_intersection - return a = a intersection b
 */
int
mdb_idl_intersection(
	ID *a,
	ID *b )
{
	ID ida, idb;
	ID idmax, idmin;
	ID cursora = 0, cursorb = 0, cursorc;
	int swap = 0;

	if ( MDB_IDL_IS_ZERO( a ) || MDB_IDL_IS_ZERO( b ) ) {
		a[0] = 0;
		return 0;
	}

	idmin = IDL_MAX( MDB_IDL_FIRST(a), MDB_IDL_FIRST(b) );
	idmax = IDL_MIN( MDB_IDL_LAST(a), MDB_IDL_LAST(b) );
	if ( idmin > idmax ) {
		a[0] = 0;
		return 0;
	} else if ( idmin == idmax ) {
		a[0] = 1;
		a[1] = idmin;
		return 0;
	}

	if ( MDB_IDL_IS_RANGE( a ) ) {
		if ( MDB_IDL_IS_RANGE(b) ) {
		/* If both are ranges, just shrink the boundaries */
			a[1] = idmin;
			a[2] = idmax;
			return 0;
		} else {
		/* Else swap so that b is the range, a is a list */
			ID *tmp = a;
			a = b;
			b = tmp;
			swap = 1;
		}
	}

	/* If a range completely covers the list, the result is
	 * just the list. If idmin to idmax is contiguous, just
	 * turn it into a range.
	 */
	if ( MDB_IDL_IS_RANGE( b )
		&& MDB_IDL_RANGE_FIRST( b ) <= MDB_IDL_RANGE_FIRST( a )
		&& MDB_IDL_RANGE_LAST( b ) >= MDB_IDL_RANGE_LAST( a ) ) {
		if (idmax - idmin + 1 == a[0])
		{
			a[0] = NOID;
			a[1] = idmin;
			a[2] = idmax;
		}
		goto done;
	}

	/* Fine, do the intersection one element at a time.
	 * First advance to idmin in both IDLs.
	 */
	cursora = cursorb = idmin;
	ida = mdb_idl_first( a, &cursora );
	idb = mdb_idl_first( b, &cursorb );
	cursorc = 0;

	while( ida <= idmax || idb <= idmax ) {
		if( ida == idb ) {
			a[++cursorc] = ida;
			ida = mdb_idl_next( a, &cursora );
			idb = mdb_idl_next( b, &cursorb );
		} else if ( ida < idb ) {
			ida = mdb_idl_next( a, &cursora );
		} else {
			idb = mdb_idl_next( b, &cursorb );
		}
	}
	a[0] = cursorc;
done:
	if (swap)
		MDB_IDL_CPY( b, a );

	return 0;
}