1 /* idl.c - ldap id list handling routines */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 2000-2008 The OpenLDAP Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
20 #include <ac/string.h>
25 #define IDL_MAX(x,y) ( x > y ? x : y )
26 #define IDL_MIN(x,y) ( x < y ? x : y )
28 #define IDL_CMP(x,y) ( x < y ? -1 : ( x > y ? 1 : 0 ) )
30 #define IDL_LRU_DELETE( bdb, e ) do { \
31 if ( (e) == (bdb)->bi_idl_lru_head ) { \
32 if ( (e)->idl_lru_next == (bdb)->bi_idl_lru_head ) { \
33 (bdb)->bi_idl_lru_head = NULL; \
35 (bdb)->bi_idl_lru_head = (e)->idl_lru_next; \
38 if ( (e) == (bdb)->bi_idl_lru_tail ) { \
39 if ( (e)->idl_lru_prev == (bdb)->bi_idl_lru_tail ) { \
40 assert( (bdb)->bi_idl_lru_head == NULL ); \
41 (bdb)->bi_idl_lru_tail = NULL; \
43 (bdb)->bi_idl_lru_tail = (e)->idl_lru_prev; \
46 (e)->idl_lru_next->idl_lru_prev = (e)->idl_lru_prev; \
47 (e)->idl_lru_prev->idl_lru_next = (e)->idl_lru_next; \
51 bdb_idl_entry_cmp( const void *v_idl1, const void *v_idl2 )
53 const bdb_idl_cache_entry_t *idl1 = v_idl1, *idl2 = v_idl2;
56 if ((rc = SLAP_PTRCMP( idl1->db, idl2->db ))) return rc;
57 if ((rc = idl1->kstr.bv_len - idl2->kstr.bv_len )) return rc;
58 return ( memcmp ( idl1->kstr.bv_val, idl2->kstr.bv_val , idl1->kstr.bv_len ) );
62 static void idl_check( ID *ids )
64 if( BDB_IDL_IS_RANGE( ids ) ) {
65 assert( BDB_IDL_RANGE_FIRST(ids) <= BDB_IDL_RANGE_LAST(ids) );
68 for( i=1; i < ids[0]; i++ ) {
69 assert( ids[i+1] > ids[i] );
75 static void idl_dump( ID *ids )
77 if( BDB_IDL_IS_RANGE( ids ) ) {
78 Debug( LDAP_DEBUG_ANY,
79 "IDL: range ( %ld - %ld )\n",
80 (long) BDB_IDL_RANGE_FIRST( ids ),
81 (long) BDB_IDL_RANGE_LAST( ids ) );
85 Debug( LDAP_DEBUG_ANY, "IDL: size %ld", (long) ids[0], 0, 0 );
87 for( i=1; i<=ids[0]; i++ ) {
89 Debug( LDAP_DEBUG_ANY, "\n", 0, 0, 0 );
91 Debug( LDAP_DEBUG_ANY, " %02lx", (long) ids[i], 0, 0 );
94 Debug( LDAP_DEBUG_ANY, "\n", 0, 0, 0 );
99 #endif /* IDL_DEBUG > 1 */
100 #endif /* IDL_DEBUG > 0 */
102 unsigned bdb_idl_search( ID *ids, ID id )
104 #define IDL_BINARY_SEARCH 1
105 #ifdef IDL_BINARY_SEARCH
107 * binary search of id in ids
108 * if found, returns position of id
109 * if not found, returns first postion greater than id
122 cursor = base + pivot;
123 val = IDL_CMP( id, ids[cursor + 1] );
128 } else if ( val > 0 ) {
144 /* (reverse) linear search */
151 for( i=ids[0]; i; i-- ) {
161 int bdb_idl_insert( ID *ids, ID id )
166 Debug( LDAP_DEBUG_ANY, "insert: %04lx at %d\n", (long) id, x, 0 );
172 if (BDB_IDL_IS_RANGE( ids )) {
173 /* if already in range, treat as a dup */
174 if (id >= BDB_IDL_FIRST(ids) && id <= BDB_IDL_LAST(ids))
176 if (id < BDB_IDL_FIRST(ids))
178 else if (id > BDB_IDL_LAST(ids))
183 x = bdb_idl_search( ids, id );
191 if ( x <= ids[0] && ids[x] == id ) {
196 if ( ++ids[0] >= BDB_IDL_DB_MAX ) {
199 ids[2] = ids[ids[0]-1];
200 } else if ( ids[ids[0]-1] < id ) {
203 ids[2] = ids[ids[0]-1];
209 AC_MEMCPY( &ids[x+1], &ids[x], (ids[0]-x) * sizeof(ID) );
222 static int bdb_idl_delete( ID *ids, ID id )
227 Debug( LDAP_DEBUG_ANY, "delete: %04lx at %d\n", (long) id, x, 0 );
233 if (BDB_IDL_IS_RANGE( ids )) {
234 /* If deleting a range boundary, adjust */
237 else if ( ids[2] == id )
239 /* deleting from inside a range is a no-op */
241 /* If the range has collapsed, re-adjust */
242 if ( ids[1] > ids[2] )
244 else if ( ids[1] == ids[2] )
249 x = bdb_idl_search( ids, id );
257 if( x > ids[0] || ids[x] != id ) {
261 } else if ( --ids[0] == 0 ) {
267 AC_MEMCPY( &ids[x], &ids[x+1], (1+ids[0]-x) * sizeof(ID) );
284 if ( key->size == 4 /* LUTIL_HASH_BYTES */ ) {
285 unsigned char *c = key->data;
286 sprintf( buf, "[%02x%02x%02x%02x]", c[0], c[1], c[2], c[3] );
293 /* Find a db/key pair in the IDL cache. If ids is non-NULL,
294 * copy the cached IDL into it, otherwise just return the status.
298 struct bdb_info *bdb,
303 bdb_idl_cache_entry_t idl_tmp;
304 bdb_idl_cache_entry_t *matched_idl_entry;
305 int rc = LDAP_NO_SUCH_OBJECT;
307 DBT2bv( key, &idl_tmp.kstr );
309 ldap_pvt_thread_rdwr_rlock( &bdb->bi_idl_tree_rwlock );
310 matched_idl_entry = avl_find( bdb->bi_idl_tree, &idl_tmp,
312 if ( matched_idl_entry != NULL ) {
313 if ( matched_idl_entry->idl && ids )
314 BDB_IDL_CPY( ids, matched_idl_entry->idl );
315 matched_idl_entry->idl_flags |= CACHE_ENTRY_REFERENCED;
316 if ( matched_idl_entry->idl )
321 ldap_pvt_thread_rdwr_runlock( &bdb->bi_idl_tree_rwlock );
328 struct bdb_info *bdb,
334 bdb_idl_cache_entry_t idl_tmp;
335 bdb_idl_cache_entry_t *ee, *eprev;
337 if ( rc == DB_NOTFOUND || BDB_IDL_IS_ZERO( ids ))
340 DBT2bv( key, &idl_tmp.kstr );
342 ee = (bdb_idl_cache_entry_t *) ch_malloc(
343 sizeof( bdb_idl_cache_entry_t ) );
345 ee->idl = (ID*) ch_malloc( BDB_IDL_SIZEOF ( ids ) );
346 BDB_IDL_CPY( ee->idl, ids );
348 ee->idl_lru_prev = NULL;
349 ee->idl_lru_next = NULL;
351 ber_dupbv( &ee->kstr, &idl_tmp.kstr );
352 ldap_pvt_thread_rdwr_wlock( &bdb->bi_idl_tree_rwlock );
353 if ( avl_insert( &bdb->bi_idl_tree, (caddr_t) ee,
354 bdb_idl_entry_cmp, avl_dup_error ))
356 ch_free( ee->kstr.bv_val );
359 ldap_pvt_thread_rdwr_wunlock( &bdb->bi_idl_tree_rwlock );
362 ldap_pvt_thread_mutex_lock( &bdb->bi_idl_tree_lrulock );
364 if ( bdb->bi_idl_lru_head ) {
365 assert( bdb->bi_idl_lru_tail != NULL );
366 assert( bdb->bi_idl_lru_head->idl_lru_prev != NULL );
367 assert( bdb->bi_idl_lru_head->idl_lru_next != NULL );
369 ee->idl_lru_next = bdb->bi_idl_lru_head;
370 ee->idl_lru_prev = bdb->bi_idl_lru_head->idl_lru_prev;
371 bdb->bi_idl_lru_head->idl_lru_prev->idl_lru_next = ee;
372 bdb->bi_idl_lru_head->idl_lru_prev = ee;
374 ee->idl_lru_next = ee->idl_lru_prev = ee;
375 bdb->bi_idl_lru_tail = ee;
377 bdb->bi_idl_lru_head = ee;
379 if ( ++bdb->bi_idl_cache_size > bdb->bi_idl_cache_max_size ) {
381 ee = bdb->bi_idl_lru_tail;
382 for ( i = 0; ee != NULL && i < 10; i++, ee = eprev ) {
383 eprev = ee->idl_lru_prev;
387 if ( ee->idl_flags & CACHE_ENTRY_REFERENCED ) {
388 ee->idl_flags ^= CACHE_ENTRY_REFERENCED;
391 if ( avl_delete( &bdb->bi_idl_tree, (caddr_t) ee,
392 bdb_idl_entry_cmp ) == NULL ) {
393 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_cache_put: "
394 "AVL delete failed\n",
397 IDL_LRU_DELETE( bdb, ee );
399 --bdb->bi_idl_cache_size;
400 ch_free( ee->kstr.bv_val );
404 bdb->bi_idl_lru_tail = eprev;
405 assert( bdb->bi_idl_lru_tail != NULL
406 || bdb->bi_idl_lru_head == NULL );
408 ldap_pvt_thread_mutex_unlock( &bdb->bi_idl_tree_lrulock );
409 ldap_pvt_thread_rdwr_wunlock( &bdb->bi_idl_tree_rwlock );
414 struct bdb_info *bdb,
418 bdb_idl_cache_entry_t *matched_idl_entry, idl_tmp;
419 DBT2bv( key, &idl_tmp.kstr );
421 ldap_pvt_thread_rdwr_wlock( &bdb->bi_idl_tree_rwlock );
422 matched_idl_entry = avl_find( bdb->bi_idl_tree, &idl_tmp,
424 if ( matched_idl_entry != NULL ) {
425 if ( avl_delete( &bdb->bi_idl_tree, (caddr_t) matched_idl_entry,
426 bdb_idl_entry_cmp ) == NULL ) {
427 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_cache_del: "
428 "AVL delete failed\n",
431 --bdb->bi_idl_cache_size;
432 ldap_pvt_thread_mutex_lock( &bdb->bi_idl_tree_lrulock );
433 IDL_LRU_DELETE( bdb, matched_idl_entry );
434 ldap_pvt_thread_mutex_unlock( &bdb->bi_idl_tree_lrulock );
435 free( matched_idl_entry->kstr.bv_val );
436 if ( matched_idl_entry->idl )
437 free( matched_idl_entry->idl );
438 free( matched_idl_entry );
440 ldap_pvt_thread_rdwr_wunlock( &bdb->bi_idl_tree_rwlock );
444 bdb_idl_cache_add_id(
445 struct bdb_info *bdb,
450 bdb_idl_cache_entry_t *cache_entry, idl_tmp;
451 DBT2bv( key, &idl_tmp.kstr );
453 ldap_pvt_thread_rdwr_wlock( &bdb->bi_idl_tree_rwlock );
454 cache_entry = avl_find( bdb->bi_idl_tree, &idl_tmp,
456 if ( cache_entry != NULL ) {
457 if ( !BDB_IDL_IS_RANGE( cache_entry->idl ) &&
458 cache_entry->idl[0] < BDB_IDL_DB_MAX ) {
459 size_t s = BDB_IDL_SIZEOF( cache_entry->idl ) + sizeof(ID);
460 cache_entry->idl = ch_realloc( cache_entry->idl, s );
462 bdb_idl_insert( cache_entry->idl, id );
464 ldap_pvt_thread_rdwr_wunlock( &bdb->bi_idl_tree_rwlock );
468 bdb_idl_cache_del_id(
469 struct bdb_info *bdb,
474 bdb_idl_cache_entry_t *cache_entry, idl_tmp;
475 DBT2bv( key, &idl_tmp.kstr );
477 ldap_pvt_thread_rdwr_wlock( &bdb->bi_idl_tree_rwlock );
478 cache_entry = avl_find( bdb->bi_idl_tree, &idl_tmp,
480 if ( cache_entry != NULL ) {
481 bdb_idl_delete( cache_entry->idl, id );
482 if ( cache_entry->idl[0] == 0 ) {
483 if ( avl_delete( &bdb->bi_idl_tree, (caddr_t) cache_entry,
484 bdb_idl_entry_cmp ) == NULL ) {
485 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_cache_del: "
486 "AVL delete failed\n",
489 --bdb->bi_idl_cache_size;
490 ldap_pvt_thread_mutex_lock( &bdb->bi_idl_tree_lrulock );
491 IDL_LRU_DELETE( bdb, cache_entry );
492 ldap_pvt_thread_mutex_unlock( &bdb->bi_idl_tree_lrulock );
493 free( cache_entry->kstr.bv_val );
494 free( cache_entry->idl );
498 ldap_pvt_thread_rdwr_wunlock( &bdb->bi_idl_tree_rwlock );
511 struct bdb_info *bdb = (struct bdb_info *) be->be_private;
513 DBT data, key2, *kptr;
519 int flags = bdb->bi_db_opflags | DB_MULTIPLE;
522 /* If using BerkeleyDB 4.0, the buf must be large enough to
523 * grab the entire IDL in one get(), otherwise BDB will leak
524 * resources on subsequent get's. We can safely call get()
525 * twice - once for the data, and once to get the DB_NOTFOUND
526 * result meaning there's no more data. See ITS#2040 for details.
527 * This bug is fixed in BDB 4.1 so a smaller buffer will work if
528 * stack space is too limited.
530 * configure now requires Berkeley DB 4.1.
532 #if DB_VERSION_FULL < 0x04010000
533 # define BDB_ENOUGH 5
535 /* We sometimes test with tiny IDLs, and BDB always wants buffers
536 * that are at least one page in size.
538 # if BDB_IDL_DB_SIZE < 4096
539 # define BDB_ENOUGH 2048
541 # define BDB_ENOUGH 1
544 ID buf[BDB_IDL_DB_SIZE*BDB_ENOUGH];
548 Debug( LDAP_DEBUG_ARGS,
549 "bdb_idl_fetch_key: %s\n",
550 bdb_show_key( key, keybuf ), 0, 0 );
552 assert( ids != NULL );
554 if ( saved_cursor && *saved_cursor ) {
556 } else if ( get_flag == LDAP_FILTER_GE ) {
557 opflag = DB_SET_RANGE;
558 } else if ( get_flag == LDAP_FILTER_LE ) {
564 /* only non-range lookups can use the IDL cache */
565 if ( bdb->bi_idl_cache_size && opflag == DB_SET ) {
566 rc = bdb_idl_cache_get( bdb, db, key, ids );
567 if ( rc != LDAP_NO_SUCH_OBJECT ) return rc;
573 data.ulen = sizeof(buf);
574 data.flags = DB_DBT_USERMEM;
576 /* If we're not reusing an existing cursor, get a new one */
577 if( opflag != DB_NEXT ) {
578 rc = db->cursor( db, txn, &cursor, bdb->bi_db_opflags );
580 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_fetch_key: "
581 "cursor failed: %s (%d)\n", db_strerror(rc), rc, 0 );
585 cursor = *saved_cursor;
588 /* If this is a LE lookup, save original key so we can determine
589 * when to stop. If this is a GE lookup, save the key since it
590 * will be overwritten.
592 if ( get_flag == LDAP_FILTER_LE || get_flag == LDAP_FILTER_GE ) {
594 key2.flags = DB_DBT_USERMEM;
595 key2.ulen = sizeof(keybuf);
597 key2.size = key->size;
598 AC_MEMCPY( keybuf, key->data, key->size );
604 rc = cursor->c_get( cursor, kptr, &data, flags | opflag );
606 /* skip presence key on range inequality lookups */
607 while (rc == 0 && kptr->size != len) {
608 rc = cursor->c_get( cursor, kptr, &data, flags | DB_NEXT_NODUP );
610 /* If we're doing a LE compare and the new key is greater than
611 * our search key, we're done
613 if (rc == 0 && get_flag == LDAP_FILTER_LE && memcmp( kptr->data,
614 key->data, key->size ) > 0 ) {
622 DB_MULTIPLE_INIT( ptr, &data );
624 DB_MULTIPLE_NEXT(ptr, &data, j, len);
630 rc = cursor->c_get( cursor, key, &data, flags | DB_NEXT_DUP );
632 if ( rc == DB_NOTFOUND ) rc = 0;
634 /* On disk, a range is denoted by 0 in the first element */
636 if (ids[0] != BDB_IDL_RANGE_SIZE) {
637 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_fetch_key: "
638 "range size mismatch: expected %d, got %ld\n",
639 BDB_IDL_RANGE_SIZE, ids[0], 0 );
640 cursor->c_close( cursor );
643 BDB_IDL_RANGE( ids, ids[2], ids[3] );
645 data.size = BDB_IDL_SIZEOF(ids);
648 if ( saved_cursor && rc == 0 ) {
649 if ( !*saved_cursor )
650 *saved_cursor = cursor;
654 rc2 = cursor->c_close( cursor );
656 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_fetch_key: "
657 "close failed: %s (%d)\n", db_strerror(rc2), rc2, 0 );
661 if( rc == DB_NOTFOUND ) {
664 } else if( rc != 0 ) {
665 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_fetch_key: "
666 "get failed: %s (%d)\n",
667 db_strerror(rc), rc, 0 );
670 } else if ( data.size == 0 || data.size % sizeof( ID ) ) {
671 /* size not multiple of ID size */
672 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_fetch_key: "
673 "odd size: expected %ld multiple, got %ld\n",
674 (long) sizeof( ID ), (long) data.size, 0 );
677 } else if ( data.size != BDB_IDL_SIZEOF(ids) ) {
679 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_fetch_key: "
680 "get size mismatch: expected %ld, got %ld\n",
681 (long) ((1 + ids[0]) * sizeof( ID )), (long) data.size, 0 );
685 if ( bdb->bi_idl_cache_max_size ) {
686 bdb_idl_cache_put( bdb, db, key, ids, rc );
701 struct bdb_info *bdb = (struct bdb_info *) be->be_private;
705 ID lo, hi, nlo, nhi, nid;
710 Debug( LDAP_DEBUG_ARGS,
711 "bdb_idl_insert_key: %lx %s\n",
712 (long) id, bdb_show_key( key, buf ), 0 );
715 assert( id != NOID );
718 data.size = sizeof( ID );
719 data.ulen = data.size;
720 data.flags = DB_DBT_USERMEM;
722 BDB_ID2DISK( id, &nid );
724 rc = db->cursor( db, tid, &cursor, bdb->bi_db_opflags );
726 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_insert_key: "
727 "cursor failed: %s (%d)\n", db_strerror(rc), rc, 0 );
731 /* Fetch the first data item for this key, to see if it
732 * exists and if it's a range.
734 rc = cursor->c_get( cursor, key, &data, DB_SET );
738 /* not a range, count the number of items */
740 rc = cursor->c_count( cursor, &count, 0 );
745 if ( count >= BDB_IDL_DB_MAX ) {
746 /* No room, convert to a range */
750 key2.dlen = key2.ulen;
751 key2.flags |= DB_DBT_PARTIAL;
753 BDB_DISK2ID( &nlo, &lo );
756 rc = cursor->c_get( cursor, &key2, &data, DB_NEXT_NODUP );
757 if ( rc != 0 && rc != DB_NOTFOUND ) {
758 err = "c_get next_nodup";
761 if ( rc == DB_NOTFOUND ) {
762 rc = cursor->c_get( cursor, key, &data, DB_LAST );
768 rc = cursor->c_get( cursor, key, &data, DB_PREV );
774 BDB_DISK2ID( &nhi, &hi );
775 /* Update hi/lo if needed, then delete all the items
781 } else if ( id > hi ) {
786 /* Don't fetch anything, just position cursor */
787 data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL;
788 data.dlen = data.ulen = 0;
789 rc = cursor->c_get( cursor, key, &data, DB_SET );
794 rc = cursor->c_del( cursor, 0 );
796 err = "c_del range1";
799 /* Delete all the records */
800 for ( i=1; i<count; i++ ) {
801 rc = cursor->c_get( cursor, &key2, &data, DB_NEXT_DUP );
803 err = "c_get next_dup";
806 rc = cursor->c_del( cursor, 0 );
812 /* Store the range marker */
813 data.size = data.ulen = sizeof(ID);
814 data.flags = DB_DBT_USERMEM;
816 rc = cursor->c_put( cursor, key, &data, DB_KEYFIRST );
822 rc = cursor->c_put( cursor, key, &data, DB_KEYLAST );
828 rc = cursor->c_put( cursor, key, &data, DB_KEYLAST );
834 /* There's room, just store it */
838 /* It's a range, see if we need to rewrite
843 rc = cursor->c_get( cursor, key, &data, DB_NEXT_DUP );
848 BDB_DISK2ID( &nlo, &lo );
851 rc = cursor->c_get( cursor, key, &data, DB_NEXT_DUP );
856 BDB_DISK2ID( &nhi, &hi );
858 if ( id < lo || id > hi ) {
859 /* Delete the current lo/hi */
860 rc = cursor->c_del( cursor, 0 );
866 rc = cursor->c_put( cursor, key, &data, DB_KEYFIRST );
873 } else if ( rc == DB_NOTFOUND ) {
874 put1: data.data = &nid;
875 rc = cursor->c_put( cursor, key, &data, DB_NODUPDATA );
876 /* Don't worry if it's already there */
877 if ( rc != 0 && rc != DB_KEYEXIST ) {
882 /* initial c_get failed, nothing was done */
884 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_insert_key: "
885 "%s failed: %s (%d)\n", err, db_strerror(rc), rc );
886 cursor->c_close( cursor );
889 /* If key was added (didn't already exist) and using IDL cache,
890 * update key in IDL cache.
892 if ( !rc && bdb->bi_idl_cache_max_size ) {
893 bdb_idl_cache_add_id( bdb, db, key, id );
895 rc = cursor->c_close( cursor );
897 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_insert_key: "
898 "c_close failed: %s (%d)\n",
899 db_strerror(rc), rc, 0 );
912 struct bdb_info *bdb = (struct bdb_info *) be->be_private;
916 ID lo, hi, tmp, nid, nlo, nhi;
921 Debug( LDAP_DEBUG_ARGS,
922 "bdb_idl_delete_key: %lx %s\n",
923 (long) id, bdb_show_key( key, buf ), 0 );
925 assert( id != NOID );
927 if ( bdb->bi_idl_cache_size ) {
928 bdb_idl_cache_del( bdb, db, key );
931 BDB_ID2DISK( id, &nid );
935 data.size = sizeof( id );
936 data.ulen = data.size;
937 data.flags = DB_DBT_USERMEM;
939 rc = db->cursor( db, tid, &cursor, bdb->bi_db_opflags );
941 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_delete_key: "
942 "cursor failed: %s (%d)\n", db_strerror(rc), rc, 0 );
945 /* Fetch the first data item for this key, to see if it
946 * exists and if it's a range.
948 rc = cursor->c_get( cursor, key, &data, DB_SET );
952 /* Not a range, just delete it */
954 /* position to correct item */
956 rc = cursor->c_get( cursor, key, &data, DB_GET_BOTH );
962 rc = cursor->c_del( cursor, 0 );
968 /* It's a range, see if we need to rewrite
972 rc = cursor->c_get( cursor, key, &data, DB_NEXT_DUP );
977 BDB_DISK2ID( &nlo, &lo );
979 rc = cursor->c_get( cursor, key, &data, DB_NEXT_DUP );
984 BDB_DISK2ID( &nhi, &hi );
985 if ( id == lo || id == hi ) {
989 } else if ( id == hi ) {
994 /* The range has collapsed... */
995 rc = db->del( db, tid, key, 0 );
1002 /* reposition on lo slot */
1004 cursor->c_get( cursor, key, &data, DB_PREV );
1006 rc = cursor->c_del( cursor, 0 );
1013 BDB_ID2DISK( id, &nid );
1015 rc = cursor->c_put( cursor, key, &data, DB_KEYFIRST );
1017 err = "c_put lo/hi";
1024 /* initial c_get failed, nothing was done */
1026 if ( rc != DB_NOTFOUND ) {
1027 Debug( LDAP_DEBUG_ANY, "=> bdb_idl_delete_key: "
1028 "%s failed: %s (%d)\n", err, db_strerror(rc), rc );
1030 cursor->c_close( cursor );
1033 rc = cursor->c_close( cursor );
1035 Debug( LDAP_DEBUG_ANY,
1036 "=> bdb_idl_delete_key: c_close failed: %s (%d)\n",
1037 db_strerror(rc), rc, 0 );
1045 * idl_intersection - return a = a intersection b
1048 bdb_idl_intersection(
1054 ID cursora = 0, cursorb = 0, cursorc;
1057 if ( BDB_IDL_IS_ZERO( a ) || BDB_IDL_IS_ZERO( b ) ) {
1062 idmin = IDL_MAX( BDB_IDL_FIRST(a), BDB_IDL_FIRST(b) );
1063 idmax = IDL_MIN( BDB_IDL_LAST(a), BDB_IDL_LAST(b) );
1064 if ( idmin > idmax ) {
1067 } else if ( idmin == idmax ) {
1073 if ( BDB_IDL_IS_RANGE( a ) ) {
1074 if ( BDB_IDL_IS_RANGE(b) ) {
1075 /* If both are ranges, just shrink the boundaries */
1080 /* Else swap so that b is the range, a is a list */
1088 /* If a range completely covers the list, the result is
1089 * just the list. If idmin to idmax is contiguous, just
1090 * turn it into a range.
1092 if ( BDB_IDL_IS_RANGE( b )
1093 && BDB_IDL_FIRST( b ) <= BDB_IDL_FIRST( a )
1094 && BDB_IDL_LAST( b ) >= BDB_IDL_LAST( a ) ) {
1095 if (idmax - idmin + 1 == a[0])
1104 /* Fine, do the intersection one element at a time.
1105 * First advance to idmin in both IDLs.
1107 cursora = cursorb = idmin;
1108 ida = bdb_idl_first( a, &cursora );
1109 idb = bdb_idl_first( b, &cursorb );
1112 while( ida <= idmax || idb <= idmax ) {
1115 ida = bdb_idl_next( a, &cursora );
1116 idb = bdb_idl_next( b, &cursorb );
1117 } else if ( ida < idb ) {
1118 ida = bdb_idl_next( a, &cursora );
1120 idb = bdb_idl_next( b, &cursorb );
1126 BDB_IDL_CPY( b, a );
1133 * idl_union - return a = a union b
1141 ID cursora = 0, cursorb = 0, cursorc;
1143 if ( BDB_IDL_IS_ZERO( b ) ) {
1147 if ( BDB_IDL_IS_ZERO( a ) ) {
1148 BDB_IDL_CPY( a, b );
1152 if ( BDB_IDL_IS_RANGE( a ) || BDB_IDL_IS_RANGE(b) ) {
1153 over: ida = IDL_MIN( BDB_IDL_FIRST(a), BDB_IDL_FIRST(b) );
1154 idb = IDL_MAX( BDB_IDL_LAST(a), BDB_IDL_LAST(b) );
1161 ida = bdb_idl_first( a, &cursora );
1162 idb = bdb_idl_first( b, &cursorb );
1166 /* The distinct elements of a are cat'd to b */
1167 while( ida != NOID || idb != NOID ) {
1169 if( ++cursorc > BDB_IDL_UM_MAX ) {
1173 ida = bdb_idl_next( a, &cursora );
1177 ida = bdb_idl_next( a, &cursora );
1178 idb = bdb_idl_next( b, &cursorb );
1182 /* b is copied back to a in sorted order */
1187 while (cursorb <= b[0] || cursorc <= a[0]) {
1192 if (cursorb <= b[0] && b[cursorb] < idb)
1193 a[cursora++] = b[cursorb++];
1206 * bdb_idl_notin - return a intersection ~b (or a minus b)
1215 ID cursora = 0, cursorb = 0;
1217 if( BDB_IDL_IS_ZERO( a ) ||
1218 BDB_IDL_IS_ZERO( b ) ||
1219 BDB_IDL_IS_RANGE( b ) )
1221 BDB_IDL_CPY( ids, a );
1225 if( BDB_IDL_IS_RANGE( a ) ) {
1226 BDB_IDL_CPY( ids, a );
1230 ida = bdb_idl_first( a, &cursora ),
1231 idb = bdb_idl_first( b, &cursorb );
1235 while( ida != NOID ) {
1236 if ( idb == NOID ) {
1237 /* we could shortcut this */
1238 ids[++ids[0]] = ida;
1239 ida = bdb_idl_next( a, &cursora );
1241 } else if ( ida < idb ) {
1242 ids[++ids[0]] = ida;
1243 ida = bdb_idl_next( a, &cursora );
1245 } else if ( ida > idb ) {
1246 idb = bdb_idl_next( b, &cursorb );
1249 ida = bdb_idl_next( a, &cursora );
1250 idb = bdb_idl_next( b, &cursorb );
1258 ID bdb_idl_first( ID *ids, ID *cursor )
1262 if ( ids[0] == 0 ) {
1267 if ( BDB_IDL_IS_RANGE( ids ) ) {
1268 if( *cursor < ids[1] ) {
1277 pos = bdb_idl_search( ids, *cursor );
1279 if( pos > ids[0] ) {
1287 ID bdb_idl_next( ID *ids, ID *cursor )
1289 if ( BDB_IDL_IS_RANGE( ids ) ) {
1290 if( ids[2] < ++(*cursor) ) {
1296 if ( ++(*cursor) <= ids[0] ) {
1297 return ids[*cursor];
1305 /* Add one ID to an unsorted list. We ensure that the first element is the
1306 * minimum and the last element is the maximum, for fast range compaction.
1307 * this means IDLs up to length 3 are always sorted...
1309 int bdb_idl_append_one( ID *ids, ID id )
1311 if (BDB_IDL_IS_RANGE( ids )) {
1312 /* if already in range, treat as a dup */
1313 if (id >= BDB_IDL_FIRST(ids) && id <= BDB_IDL_LAST(ids))
1315 if (id < BDB_IDL_FIRST(ids))
1317 else if (id > BDB_IDL_LAST(ids))
1329 if ( ids[0] > 1 && id < ids[ids[0]] ) {
1336 if ( ids[0] >= BDB_IDL_UM_MAX ) {
1345 /* Append sorted list b to sorted list a. The result is unsorted but
1346 * a[1] is the min of the result and a[a[0]] is the max.
1348 int bdb_idl_append( ID *a, ID *b )
1350 ID ida, idb, tmp, swap = 0;
1352 if ( BDB_IDL_IS_ZERO( b ) ) {
1356 if ( BDB_IDL_IS_ZERO( a ) ) {
1357 BDB_IDL_CPY( a, b );
1361 ida = BDB_IDL_LAST( a );
1362 idb = BDB_IDL_LAST( b );
1363 if ( BDB_IDL_IS_RANGE( a ) || BDB_IDL_IS_RANGE(b) ||
1364 a[0] + b[0] >= BDB_IDL_UM_MAX ) {
1365 a[2] = IDL_MAX( ida, idb );
1366 a[1] = IDL_MIN( a[1], b[1] );
1371 if ( b[0] > 1 && ida > idb ) {
1377 if ( b[1] < a[1] ) {
1388 AC_MEMCPY(a+a[0]+1, b+2, i * sizeof(ID));
1399 /* Quicksort + Insertion sort for small arrays */
1402 #define SWAP(a,b) itmp=(a);(a)=(b);(b)=itmp
1405 bdb_idl_sort( ID *ids, ID *tmp )
1407 int *istack = (int *)tmp;
1408 int i,j,k,l,ir,jstack;
1411 if ( BDB_IDL_IS_RANGE( ids ))
1418 if (ir - l < SMALL) { /* Insertion sort */
1419 for (j=l+1;j<=ir;j++) {
1421 for (i=j-1;i>=1;i--) {
1422 if (ids[i] <= a) break;
1427 if (jstack == 0) break;
1428 ir = istack[jstack--];
1429 l = istack[jstack--];
1431 k = (l + ir) >> 1; /* Choose median of left, center, right */
1432 SWAP(ids[k], ids[l+1]);
1433 if (ids[l] > ids[ir]) {
1434 SWAP(ids[l], ids[ir]);
1436 if (ids[l+1] > ids[ir]) {
1437 SWAP(ids[l+1], ids[ir]);
1439 if (ids[l] > ids[l+1]) {
1440 SWAP(ids[l], ids[l+1]);
1446 do i++; while(ids[i] < a);
1447 do j--; while(ids[j] > a);
1449 SWAP(ids[i],ids[j]);
1454 if (ir-i+1 >= j-1) {
1455 istack[jstack] = ir;
1456 istack[jstack-1] = i;
1459 istack[jstack] = j-1;
1460 istack[jstack-1] = l;
1469 /* 8 bit Radix sort + insertion sort
1471 * based on code from http://www.cubic.org/docs/radix.htm
1472 * with improvements by mbackes@symas.com and hyc@symas.com
1474 * This code is O(n) but has a relatively high constant factor. For lists
1475 * up to ~50 Quicksort is slightly faster; up to ~100 they are even.
1476 * Much faster than quicksort for lists longer than ~100. Insertion
1477 * sort is actually superior for lists <50.
1480 #define BUCKETS (1<<8)
1484 bdb_idl_sort( ID *ids, ID *tmp )
1486 int count, soft_limit, phase = 0, size = ids[0];
1488 unsigned char *maxv = (unsigned char *)&ids[size];
1490 if ( BDB_IDL_IS_RANGE( ids ))
1493 /* Use insertion sort for small lists */
1494 if ( size <= SMALL ) {
1498 for (j=1;j<=size;j++) {
1500 for (i=j-1;i>=1;i--) {
1501 if (ids[i] <= a) break;
1513 #if BYTE_ORDER == BIG_ENDIAN
1514 for (soft_limit = 0; !maxv[soft_limit]; soft_limit++);
1516 for (soft_limit = sizeof(ID)-1; !maxv[soft_limit]; soft_limit--);
1520 #if BYTE_ORDER == BIG_ENDIAN
1521 count = sizeof(ID)-1; count >= soft_limit; --count
1523 count = 0; count <= soft_limit; ++count
1526 unsigned int num[BUCKETS], * np, n, sum;
1528 ID *sp, *source, *dest;
1529 unsigned char *bp, *source_start;
1531 source = idls[phase]+1;
1532 dest = idls[phase^1]+1;
1533 source_start = ((unsigned char *) source) + count;
1536 for ( i = BUCKETS; i > 0; --i ) *np++ = 0;
1538 /* count occurences of every byte value */
1540 for ( i = size; i > 0; --i, bp += sizeof(ID) )
1543 /* transform count into index by summing elements and storing
1548 for ( i = BUCKETS; i > 0; --i ) {
1554 /* fill dest with the right values in the right place */
1557 for ( i = size; i > 0; --i, bp += sizeof(ID) ) {
1565 /* copy back from temp if needed */
1568 for ( count = 0; count < size; ++count )
1572 #endif /* Quick vs Radix */
1574 #endif /* BDB_HIER */