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1058 lines
22 KiB
C
1058 lines
22 KiB
C
/* idl.c - ldap id list handling routines */
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/*
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* Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/string.h>
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#include <ac/socket.h>
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#include "ldap_defaults.h"
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#include "slap.h"
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#include "back-ldbm.h"
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static ID_BLOCK* idl_dup( ID_BLOCK *idl );
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/* Allocate an ID_BLOCK with room for nids ids */
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ID_BLOCK *
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idl_alloc( unsigned int nids )
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{
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ID_BLOCK *new;
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/* nmax + nids + space for the ids */
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new = (ID_BLOCK *) ch_calloc( (ID_BLOCK_IDS_OFFSET + nids), sizeof(ID) );
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ID_BLOCK_NMAX(new) = nids;
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ID_BLOCK_NIDS(new) = 0;
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return( new );
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}
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/* Allocate an empty ALLIDS ID_BLOCK */
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ID_BLOCK *
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idl_allids( Backend *be )
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{
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ID_BLOCK *idl;
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idl = idl_alloc( 0 );
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ID_BLOCK_NMAX(idl) = ID_BLOCK_ALLIDS_VALUE;
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ID_BLOCK_NIDS(idl) = next_id_get( be );
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return( idl );
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}
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/* Free an ID_BLOCK */
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void
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idl_free( ID_BLOCK *idl )
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{
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if ( idl == NULL ) {
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Debug( LDAP_DEBUG_TRACE,
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"idl_free: called with NULL pointer\n",
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0, 0, 0 );
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return;
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}
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free( (char *) idl );
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}
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/* Fetch an single ID_BLOCK from the cache */
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static ID_BLOCK *
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idl_fetch_one(
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Backend *be,
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DBCache *db,
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Datum key
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)
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{
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Datum data;
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ID_BLOCK *idl;
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/* Debug( LDAP_DEBUG_TRACE, "=> idl_fetch_one\n", 0, 0, 0 ); */
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data = ldbm_cache_fetch( db, key );
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if( data.dptr == NULL ) {
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return NULL;
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}
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idl = idl_dup((ID_BLOCK *) data.dptr);
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ldbm_datum_free( db->dbc_db, data );
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return idl;
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}
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/* Fetch a set of ID_BLOCKs from the cache
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* if not INDIRECT
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* if block return is an ALLIDS block,
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* return an new ALLIDS block
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* otherwise
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* return block
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* construct super block from all blocks referenced by INDIRECT block
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* return super block
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*/
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ID_BLOCK *
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idl_fetch(
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Backend *be,
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DBCache *db,
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Datum key
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)
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{
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Datum data;
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ID_BLOCK *idl;
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ID_BLOCK **tmp;
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char *kstr;
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int i, nids;
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idl = idl_fetch_one( be, db, key );
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if ( idl == NULL ) {
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return NULL;
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}
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if ( ID_BLOCK_ALLIDS(idl) ) {
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/* all ids block */
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/* make sure we have the current value of highest id */
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idl_free( idl );
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idl = idl_allids( be );
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return( idl );
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}
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if ( ! ID_BLOCK_INDIRECT( idl ) ) {
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/* regular block */
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return( idl );
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}
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/*
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* this is an indirect block which points to other blocks.
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* we need to read in all the blocks it points to and construct
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* a big id list containing all the ids, which we will return.
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*/
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/* count the number of blocks & allocate space for pointers to them */
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for ( i = 0; !ID_BLOCK_NOID(idl, i); i++ )
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; /* NULL */
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tmp = (ID_BLOCK **) ch_malloc( (i + 1) * sizeof(ID_BLOCK *) );
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/* read in all the blocks */
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kstr = (char *) ch_malloc( key.dsize + CONT_SIZE );
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nids = 0;
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for ( i = 0; !ID_BLOCK_NOID(idl, i); i++ ) {
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ldbm_datum_init( data );
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sprintf( kstr, "%c%ld%s", CONT_PREFIX,
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ID_BLOCK_ID(idl, i), key.dptr );
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data.dptr = kstr;
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data.dsize = strlen( kstr ) + 1;
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if ( (tmp[i] = idl_fetch_one( be, db, data )) == NULL ) {
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Debug( LDAP_DEBUG_ANY,
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"idl_fetch of (%s) returns NULL\n", data.dptr, 0, 0 );
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continue;
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}
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nids += ID_BLOCK_NIDS(tmp[i]);
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}
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tmp[i] = NULL;
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free( kstr );
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idl_free( idl );
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/* allocate space for the big block */
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idl = idl_alloc( nids );
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ID_BLOCK_NIDS(idl) = nids;
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nids = 0;
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/* copy in all the ids from the component blocks */
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for ( i = 0; tmp[i] != NULL; i++ ) {
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if ( tmp[i] == NULL ) {
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continue;
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}
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SAFEMEMCPY(
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(char *) &ID_BLOCK_ID(idl, nids),
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(char *) &ID_BLOCK_ID(tmp[i], 0),
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ID_BLOCK_NIDS(tmp[i]) * sizeof(ID) );
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nids += ID_BLOCK_NIDS(tmp[i]);
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idl_free( tmp[i] );
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}
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free( (char *) tmp );
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Debug( LDAP_DEBUG_TRACE, "<= idl_fetch %ld ids (%ld max)\n",
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ID_BLOCK_NIDS(idl), ID_BLOCK_NMAX(idl), 0 );
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return( idl );
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}
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/* store a single block */
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static int
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idl_store(
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Backend *be,
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DBCache *db,
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Datum key,
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ID_BLOCK *idl
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)
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{
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int rc, flags;
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Datum data;
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struct ldbminfo *li = (struct ldbminfo *) be->be_private;
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ldbm_datum_init( data );
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/* Debug( LDAP_DEBUG_TRACE, "=> idl_store\n", 0, 0, 0 ); */
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data.dptr = (char *) idl;
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data.dsize = (ID_BLOCK_IDS_OFFSET + ID_BLOCK_NMAX(idl)) * sizeof(ID);
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#ifdef LDBM_DEBUG
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Statslog( LDAP_DEBUG_STATS, "<= idl_store(): rc=%d\n",
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rc, 0, 0, 0, 0 );
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#endif
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flags = LDBM_REPLACE;
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if( li->li_dbcachewsync ) flags |= LDBM_SYNC;
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rc = ldbm_cache_store( db, key, data, flags );
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/* Debug( LDAP_DEBUG_TRACE, "<= idl_store %d\n", rc, 0, 0 ); */
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return( rc );
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}
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/* split the block at id
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* locate ID greater than or equal to id.
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*/
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static void
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idl_split_block(
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ID_BLOCK *b,
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ID id,
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ID_BLOCK **right,
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ID_BLOCK **left
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)
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{
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unsigned int nr, nl;
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/* find where to split the block *//* XXX linear search XXX */
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for ( nr = 0; nr < ID_BLOCK_NIDS(b) && id > ID_BLOCK_ID(b, nr); nr++ )
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; /* NULL */
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nl = ID_BLOCK_NIDS(b) - nr;
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*right = idl_alloc( nr == 0 ? 1 : nr );
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*left = idl_alloc( nl + (nr == 0 ? 0 : 1));
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/*
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* everything before the id being inserted in the first block
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* unless there is nothing, in which case the id being inserted
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* goes there.
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*/
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if ( nr == 0 ) {
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ID_BLOCK_NIDS(*right) = 1;
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ID_BLOCK_ID(*right, 0) = id;
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} else {
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SAFEMEMCPY(
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(char *) &ID_BLOCK_ID(*right, 0),
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(char *) &ID_BLOCK_ID(b, 0),
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nr * sizeof(ID) );
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ID_BLOCK_NIDS(*right) = nr;
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ID_BLOCK_ID(*left, 0) = id;
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}
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/* the id being inserted & everything after in the second block */
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SAFEMEMCPY(
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(char *) &ID_BLOCK_ID(*left, (nr == 0 ? 0 : 1)),
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(char *) &ID_BLOCK_ID(b, nr),
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nl * sizeof(ID) );
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ID_BLOCK_NIDS(*left) = nl + (nr == 0 ? 0 : 1);
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}
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/*
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* idl_change_first - called when an indirect block's first key has
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* changed, meaning it needs to be stored under a new key, and the
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* header block pointing to it needs updating.
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*/
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static int
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idl_change_first(
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Backend *be,
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DBCache *db,
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Datum hkey, /* header block key */
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ID_BLOCK *h, /* header block */
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int pos, /* pos in h to update */
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Datum bkey, /* data block key */
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ID_BLOCK *b /* data block */
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)
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{
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int rc;
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/* Debug( LDAP_DEBUG_TRACE, "=> idl_change_first\n", 0, 0, 0 ); */
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/* delete old key block */
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if ( (rc = ldbm_cache_delete( db, bkey )) != 0 ) {
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Debug( LDAP_DEBUG_ANY,
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"ldbm_delete of (%s) returns %d\n", bkey.dptr, rc,
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0 );
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return( rc );
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}
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/* write block with new key */
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sprintf( bkey.dptr, "%c%ld%s", CONT_PREFIX,
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ID_BLOCK_ID(b, 0), hkey.dptr );
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bkey.dsize = strlen( bkey.dptr ) + 1;
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if ( (rc = idl_store( be, db, bkey, b )) != 0 ) {
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Debug( LDAP_DEBUG_ANY,
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"idl_store of (%s) returns %d\n", bkey.dptr, rc, 0 );
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return( rc );
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}
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/* update + write indirect header block */
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ID_BLOCK_ID(h, pos) = ID_BLOCK_ID(b, 0);
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if ( (rc = idl_store( be, db, hkey, h )) != 0 ) {
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Debug( LDAP_DEBUG_ANY,
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"idl_store of (%s) returns %d\n", hkey.dptr, rc, 0 );
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return( rc );
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}
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return( 0 );
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}
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int
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idl_insert_key(
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Backend *be,
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DBCache *db,
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Datum key,
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ID id
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)
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{
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int i, j, first, rc;
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ID_BLOCK *idl, *tmp, *tmp2, *tmp3;
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char *kstr;
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Datum k2;
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ldbm_datum_init( k2 );
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if ( (idl = idl_fetch_one( be, db, key )) == NULL ) {
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#ifdef LDBM_DEBUG
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Statslog( LDAP_DEBUG_STATS, "=> idl_insert_key(): no key yet\n",
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0, 0, 0, 0, 0 );
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#endif
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idl = idl_alloc( 1 );
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ID_BLOCK_ID(idl, ID_BLOCK_NIDS(idl)++) = id;
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rc = idl_store( be, db, key, idl );
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idl_free( idl );
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return( rc );
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}
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if ( ID_BLOCK_ALLIDS( idl ) ) {
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/* ALLIDS */
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idl_free( idl );
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return 0;
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}
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if ( ! ID_BLOCK_INDIRECT( idl ) ) {
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/* regular block */
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switch ( idl_insert( &idl, id, db->dbc_maxids ) ) {
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case 0: /* id inserted - store the updated block */
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case 1:
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rc = idl_store( be, db, key, idl );
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break;
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case 2: /* id already there - nothing to do */
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rc = 0;
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break;
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case 3: /* id not inserted - block must be split */
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/* check threshold for marking this an all-id block */
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if ( db->dbc_maxindirect < 2 ) {
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idl_free( idl );
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idl = idl_allids( be );
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rc = idl_store( be, db, key, idl );
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break;
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}
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idl_split_block( idl, id, &tmp, &tmp2 );
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idl_free( idl );
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/* create the header indirect block */
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idl = idl_alloc( 3 );
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ID_BLOCK_NMAX(idl) = 3;
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ID_BLOCK_NIDS(idl) = ID_BLOCK_INDIRECT_VALUE;
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ID_BLOCK_ID(idl, 0) = ID_BLOCK_ID(tmp, 0);
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ID_BLOCK_ID(idl, 1) = ID_BLOCK_ID(tmp2, 0);
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ID_BLOCK_ID(idl, 2) = NOID;
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/* store it */
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rc = idl_store( be, db, key, idl );
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/* store the first id block */
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kstr = (char *) ch_malloc( key.dsize + CONT_SIZE );
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sprintf( kstr, "%c%ld%s", CONT_PREFIX,
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ID_BLOCK_ID(tmp, 0), key.dptr );
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k2.dptr = kstr;
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k2.dsize = strlen( kstr ) + 1;
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rc = idl_store( be, db, k2, tmp );
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/* store the second id block */
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sprintf( kstr, "%c%ld%s", CONT_PREFIX,
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ID_BLOCK_ID(tmp2, 0), key.dptr );
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k2.dptr = kstr;
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k2.dsize = strlen( kstr ) + 1;
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rc = idl_store( be, db, k2, tmp2 );
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free( kstr );
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idl_free( tmp );
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idl_free( tmp2 );
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break;
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}
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idl_free( idl );
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return( rc );
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}
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/*
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* this is an indirect block which points to other blocks.
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* we need to read in the block into which the id should be
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* inserted, then insert the id and store the block. we might
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* have to split the block if it is full, which means we also
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* need to write a new "header" block.
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*/
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/* select the block to try inserting into *//* XXX linear search XXX */
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for ( i = 0; !ID_BLOCK_NOID(idl, i) && id > ID_BLOCK_ID(idl, i); i++ )
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; /* NULL */
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if ( i != 0 ) {
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i--;
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first = 0;
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} else {
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first = 1;
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}
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/* get the block */
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kstr = (char *) ch_malloc( key.dsize + CONT_SIZE );
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sprintf( kstr, "%c%ld%s", CONT_PREFIX,
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ID_BLOCK_ID(idl, i), key.dptr );
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k2.dptr = kstr;
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k2.dsize = strlen( kstr ) + 1;
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if ( (tmp = idl_fetch_one( be, db, k2 )) == NULL ) {
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Debug( LDAP_DEBUG_ANY, "nonexistent continuation block (%s)\n",
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k2.dptr, 0, 0 );
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free( kstr );
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idl_free( idl );
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return( -1 );
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}
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/* insert the id */
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switch ( idl_insert( &tmp, id, db->dbc_maxids ) ) {
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case 0: /* id inserted ok */
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if ( (rc = idl_store( be, db, k2, tmp )) != 0 ) {
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Debug( LDAP_DEBUG_ANY,
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"idl_store of (%s) returns %d\n", k2.dptr, rc, 0 );
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}
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break;
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case 1: /* id inserted - first id in block has changed */
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/*
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* key for this block has changed, so we have to
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* write the block under the new key, delete the
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* old key block + update and write the indirect
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* header block.
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*/
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rc = idl_change_first( be, db, key, idl, i, k2, tmp );
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break;
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case 2: /* id not inserted - already there, do nothing */
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rc = 0;
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break;
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case 3: /* id not inserted - block is full */
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/*
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* first, see if it will fit in the next block,
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* without splitting, unless we're trying to insert
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* into the beginning of the first block.
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*/
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/* is there a next block? */
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if ( !first && !ID_BLOCK_NOID(idl, i + 1) ) {
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/* read it in */
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sprintf( kstr, "%c%ld%s", CONT_PREFIX,
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ID_BLOCK_ID(idl, i + 1), key.dptr );
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k2.dptr = kstr;
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k2.dsize = strlen( kstr ) + 1;
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if ( (tmp2 = idl_fetch_one( be, db, k2 )) == NULL ) {
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Debug( LDAP_DEBUG_ANY,
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"idl_fetch_one (%s) returns NULL\n",
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k2.dptr, 0, 0 );
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/* split the original block */
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goto split;
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}
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switch ( (rc = idl_insert( &tmp2, id,
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db->dbc_maxids )) ) {
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case 1: /* id inserted first in block */
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rc = idl_change_first( be, db, key, idl,
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i + 1, k2, tmp2 );
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/* FALL */
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case 2: /* id already there - how? */
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case 0: /* id inserted */
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if ( rc == 2 ) {
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Debug( LDAP_DEBUG_ANY,
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"id %ld already in next block\n",
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id, 0, 0 );
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}
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free( kstr );
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idl_free( tmp );
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idl_free( tmp2 );
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idl_free( idl );
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return( 0 );
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case 3: /* split the original block */
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break;
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}
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idl_free( tmp2 );
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}
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split:
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/*
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* must split the block, write both new blocks + update
|
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* and write the indirect header block.
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*/
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rc = 0; /* optimistic */
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|
|
/* count how many indirect blocks *//* XXX linear count XXX */
|
|
for ( j = 0; !ID_BLOCK_NOID(idl, j); j++ )
|
|
; /* NULL */
|
|
|
|
/* check it against all-id thresholed */
|
|
if ( j + 1 > db->dbc_maxindirect ) {
|
|
/*
|
|
* we've passed the all-id threshold, meaning
|
|
* that this set of blocks should be replaced
|
|
* by a single "all-id" block. our job: delete
|
|
* all the indirect blocks, and replace the header
|
|
* block by an all-id block.
|
|
*/
|
|
|
|
/* delete all indirect blocks */
|
|
for ( j = 0; !ID_BLOCK_NOID(idl, j); j++ ) {
|
|
sprintf( kstr, "%c%ld%s", CONT_PREFIX,
|
|
ID_BLOCK_ID(idl, j), key.dptr );
|
|
k2.dptr = kstr;
|
|
k2.dsize = strlen( kstr ) + 1;
|
|
|
|
rc = ldbm_cache_delete( db, k2 );
|
|
}
|
|
|
|
/* store allid block in place of header block */
|
|
idl_free( idl );
|
|
idl = idl_allids( be );
|
|
rc = idl_store( be, db, key, idl );
|
|
|
|
free( kstr );
|
|
idl_free( idl );
|
|
idl_free( tmp );
|
|
return( rc );
|
|
}
|
|
|
|
idl_split_block( tmp, id, &tmp2, &tmp3 );
|
|
idl_free( tmp );
|
|
|
|
/* create a new updated indirect header block */
|
|
tmp = idl_alloc( ID_BLOCK_NMAX(idl) + 1 );
|
|
ID_BLOCK_NIDS(tmp) = ID_BLOCK_INDIRECT_VALUE;
|
|
/* everything up to the split block */
|
|
SAFEMEMCPY(
|
|
(char *) &ID_BLOCK_ID(tmp, 0),
|
|
(char *) &ID_BLOCK_ID(idl, 0),
|
|
i * sizeof(ID) );
|
|
/* the two new blocks */
|
|
ID_BLOCK_ID(tmp, i) = ID_BLOCK_ID(tmp2, 0);
|
|
ID_BLOCK_ID(tmp, i + 1) = ID_BLOCK_ID(tmp3, 0);
|
|
/* everything after the split block */
|
|
SAFEMEMCPY(
|
|
(char *) &ID_BLOCK_ID(tmp, i + 2),
|
|
(char *) &ID_BLOCK_ID(idl, i + 1),
|
|
(ID_BLOCK_NMAX(idl) - i - 1) * sizeof(ID) );
|
|
|
|
/* store the header block */
|
|
rc = idl_store( be, db, key, tmp );
|
|
|
|
/* store the first id block */
|
|
sprintf( kstr, "%c%ld%s", CONT_PREFIX,
|
|
ID_BLOCK_ID(tmp2, 0), key.dptr );
|
|
k2.dptr = kstr;
|
|
k2.dsize = strlen( kstr ) + 1;
|
|
rc = idl_store( be, db, k2, tmp2 );
|
|
|
|
/* store the second id block */
|
|
sprintf( kstr, "%c%ld%s", CONT_PREFIX,
|
|
ID_BLOCK_ID(tmp3, 0), key.dptr );
|
|
k2.dptr = kstr;
|
|
k2.dsize = strlen( kstr ) + 1;
|
|
rc = idl_store( be, db, k2, tmp3 );
|
|
|
|
idl_free( tmp2 );
|
|
idl_free( tmp3 );
|
|
break;
|
|
}
|
|
|
|
free( kstr );
|
|
idl_free( tmp );
|
|
idl_free( idl );
|
|
return( rc );
|
|
}
|
|
|
|
|
|
/*
|
|
* idl_insert - insert an id into an id list.
|
|
*
|
|
* returns
|
|
* 0 id inserted
|
|
* 1 id inserted, first id in block has changed
|
|
* 2 id not inserted, already there
|
|
* 3 id not inserted, block must be split
|
|
*/
|
|
int
|
|
idl_insert( ID_BLOCK **idl, ID id, unsigned int maxids )
|
|
{
|
|
unsigned int i;
|
|
|
|
if ( ID_BLOCK_ALLIDS( *idl ) ) {
|
|
return( 2 ); /* already there */
|
|
}
|
|
|
|
/* is it already there? *//* XXX linear search XXX */
|
|
for ( i = 0; i < ID_BLOCK_NIDS(*idl) && id > ID_BLOCK_ID(*idl, i); i++ ) {
|
|
; /* NULL */
|
|
}
|
|
if ( i < ID_BLOCK_NIDS(*idl) && ID_BLOCK_ID(*idl, i) == id ) {
|
|
return( 2 ); /* already there */
|
|
}
|
|
|
|
/* do we need to make room for it? */
|
|
if ( ID_BLOCK_NIDS(*idl) == ID_BLOCK_NMAX(*idl) ) {
|
|
/* make room or indicate block needs splitting */
|
|
if ( ID_BLOCK_NMAX(*idl) >= maxids ) {
|
|
return( 3 ); /* block needs splitting */
|
|
}
|
|
|
|
ID_BLOCK_NMAX(*idl) *= 2;
|
|
if ( ID_BLOCK_NMAX(*idl) > maxids ) {
|
|
ID_BLOCK_NMAX(*idl) = maxids;
|
|
}
|
|
*idl = (ID_BLOCK *) ch_realloc( (char *) *idl,
|
|
(ID_BLOCK_NMAX(*idl) + ID_BLOCK_IDS_OFFSET) * sizeof(ID) );
|
|
}
|
|
|
|
/* make a slot for the new id */
|
|
SAFEMEMCPY( &ID_BLOCK_ID(*idl, i), &ID_BLOCK_ID(*idl, i+1),
|
|
ID_BLOCK_NIDS(*idl) - i );
|
|
|
|
ID_BLOCK_ID(*idl, i) = id;
|
|
ID_BLOCK_NIDS(*idl)++;
|
|
(void) memset(
|
|
(char *) &ID_BLOCK_ID((*idl), ID_BLOCK_NIDS(*idl)),
|
|
'\0',
|
|
(ID_BLOCK_NMAX(*idl) - ID_BLOCK_NIDS(*idl)) * sizeof(ID) );
|
|
|
|
return( i == 0 ? 1 : 0 ); /* inserted - first id changed or not */
|
|
}
|
|
|
|
|
|
int
|
|
idl_delete_key (
|
|
Backend *be,
|
|
DBCache *db,
|
|
Datum key,
|
|
ID id
|
|
)
|
|
{
|
|
Datum data;
|
|
ID_BLOCK *idl;
|
|
unsigned i;
|
|
int j, nids;
|
|
char *kstr;
|
|
|
|
if ( (idl = idl_fetch_one( be, db, key ) ) == NULL )
|
|
{
|
|
/* It wasn't found. Hmm... */
|
|
return -1;
|
|
}
|
|
|
|
if ( ID_BLOCK_ALLIDS( idl ) ) {
|
|
idl_free( idl );
|
|
return 0;
|
|
}
|
|
|
|
if ( ! ID_BLOCK_INDIRECT( idl ) ) {
|
|
for ( i=0; i < ID_BLOCK_NIDS(idl); i++ ) {
|
|
if ( ID_BLOCK_ID(idl, i) == id ) {
|
|
if( --ID_BLOCK_NIDS(idl) == 0 ) {
|
|
ldbm_cache_delete( db, key );
|
|
|
|
} else {
|
|
SAFEMEMCPY (
|
|
&ID_BLOCK_ID(idl, i),
|
|
&ID_BLOCK_ID(idl, i+1),
|
|
(ID_BLOCK_NIDS(idl)-i) * sizeof(ID) );
|
|
|
|
ID_BLOCK_ID(idl, ID_BLOCK_NIDS(idl)) = NOID;
|
|
|
|
idl_store( be, db, key, idl );
|
|
}
|
|
|
|
idl_free( idl );
|
|
return 0;
|
|
}
|
|
/* We didn't find the ID. Hmmm... */
|
|
}
|
|
idl_free( idl );
|
|
return -1;
|
|
}
|
|
|
|
/* We have to go through an indirect block and find the ID
|
|
in the list of IDL's
|
|
*/
|
|
for ( nids = 0; !ID_BLOCK_NOID(idl, nids); nids++ )
|
|
; /* NULL */
|
|
kstr = (char *) ch_malloc( key.dsize + CONT_SIZE );
|
|
|
|
for ( j = 0; !ID_BLOCK_NOID(idl, j); j++ )
|
|
{
|
|
ID_BLOCK *tmp;
|
|
ldbm_datum_init( data );
|
|
sprintf( kstr, "%c%ld%s", CONT_PREFIX,
|
|
ID_BLOCK_ID(idl, j), key.dptr );
|
|
data.dptr = kstr;
|
|
data.dsize = strlen( kstr ) + 1;
|
|
|
|
if ( (tmp = idl_fetch_one( be, db, data )) == NULL ) {
|
|
Debug( LDAP_DEBUG_ANY,
|
|
"idl_fetch of (%s) returns NULL\n", data.dptr, 0, 0 );
|
|
continue;
|
|
}
|
|
/*
|
|
Now try to find the ID in tmp
|
|
*/
|
|
for ( i=0; i < ID_BLOCK_NIDS(tmp); i++ )
|
|
{
|
|
if ( ID_BLOCK_ID(tmp, i) == id )
|
|
{
|
|
SAFEMEMCPY(
|
|
&ID_BLOCK_ID(tmp, i),
|
|
&ID_BLOCK_ID(tmp, i+1),
|
|
(ID_BLOCK_NIDS(tmp)-(i+1)) * sizeof(ID));
|
|
ID_BLOCK_ID(tmp, ID_BLOCK_NIDS(tmp)-1 ) = NOID;
|
|
ID_BLOCK_NIDS(tmp)--;
|
|
|
|
if ( ID_BLOCK_NIDS(tmp) ) {
|
|
idl_store ( be, db, data, tmp );
|
|
|
|
} else {
|
|
ldbm_cache_delete( db, data );
|
|
SAFEMEMCPY(
|
|
&ID_BLOCK_ID(idl, j),
|
|
&ID_BLOCK_ID(idl, j+1),
|
|
(nids-(j+1)) * sizeof(ID));
|
|
ID_BLOCK_ID(idl, nids-1) = NOID;
|
|
nids--;
|
|
if ( ! nids )
|
|
ldbm_cache_delete( db, key );
|
|
else
|
|
idl_store( be, db, key, idl );
|
|
}
|
|
idl_free( tmp );
|
|
free( kstr );
|
|
idl_free( idl );
|
|
return 0;
|
|
}
|
|
}
|
|
idl_free( tmp );
|
|
}
|
|
free( kstr );
|
|
idl_free( idl );
|
|
return -1;
|
|
}
|
|
|
|
|
|
/* return a duplicate of a single ID_BLOCK */
|
|
static ID_BLOCK *
|
|
idl_dup( ID_BLOCK *idl )
|
|
{
|
|
ID_BLOCK *new;
|
|
|
|
if ( idl == NULL ) {
|
|
return( NULL );
|
|
}
|
|
|
|
new = idl_alloc( ID_BLOCK_NMAX(idl) );
|
|
|
|
SAFEMEMCPY(
|
|
(char *) new,
|
|
(char *) idl,
|
|
(ID_BLOCK_NMAX(idl) + ID_BLOCK_IDS_OFFSET) * sizeof(ID) );
|
|
|
|
return( new );
|
|
}
|
|
|
|
|
|
/* return the smaller ID_BLOCK */
|
|
static ID_BLOCK *
|
|
idl_min( ID_BLOCK *a, ID_BLOCK *b )
|
|
{
|
|
return( ID_BLOCK_NIDS(a) > ID_BLOCK_NIDS(b) ? b : a );
|
|
}
|
|
|
|
|
|
/*
|
|
* idl_intersection - return a intersection b
|
|
*/
|
|
ID_BLOCK *
|
|
idl_intersection(
|
|
Backend *be,
|
|
ID_BLOCK *a,
|
|
ID_BLOCK *b
|
|
)
|
|
{
|
|
unsigned int ai, bi, ni;
|
|
ID_BLOCK *n;
|
|
|
|
if ( a == NULL || b == NULL ) {
|
|
return( NULL );
|
|
}
|
|
if ( ID_BLOCK_ALLIDS( a ) ) {
|
|
return( idl_dup( b ) );
|
|
}
|
|
if ( ID_BLOCK_ALLIDS( b ) ) {
|
|
return( idl_dup( a ) );
|
|
}
|
|
|
|
n = idl_dup( idl_min( a, b ) );
|
|
|
|
for ( ni = 0, ai = 0, bi = 0; ai < ID_BLOCK_NIDS(a); ai++ ) {
|
|
for ( ;
|
|
bi < ID_BLOCK_NIDS(b) && ID_BLOCK_ID(b, bi) < ID_BLOCK_ID(a, ai);
|
|
bi++ )
|
|
{
|
|
; /* NULL */
|
|
}
|
|
|
|
if ( bi == ID_BLOCK_NIDS(b) ) {
|
|
break;
|
|
}
|
|
|
|
if ( ID_BLOCK_ID(b, bi) == ID_BLOCK_ID(a, ai) ) {
|
|
ID_BLOCK_ID(n, ni++) = ID_BLOCK_ID(a, ai);
|
|
}
|
|
}
|
|
|
|
if ( ni == 0 ) {
|
|
idl_free( n );
|
|
return( NULL );
|
|
}
|
|
ID_BLOCK_NIDS(n) = ni;
|
|
|
|
return( n );
|
|
}
|
|
|
|
|
|
/*
|
|
* idl_union - return a union b
|
|
*/
|
|
ID_BLOCK *
|
|
idl_union(
|
|
Backend *be,
|
|
ID_BLOCK *a,
|
|
ID_BLOCK *b
|
|
)
|
|
{
|
|
unsigned int ai, bi, ni;
|
|
ID_BLOCK *n;
|
|
|
|
if ( a == NULL ) {
|
|
return( idl_dup( b ) );
|
|
}
|
|
if ( b == NULL ) {
|
|
return( idl_dup( a ) );
|
|
}
|
|
if ( ID_BLOCK_ALLIDS( a ) || ID_BLOCK_ALLIDS( b ) ) {
|
|
return( idl_allids( be ) );
|
|
}
|
|
|
|
if ( ID_BLOCK_NIDS(b) < ID_BLOCK_NIDS(a) ) {
|
|
n = a;
|
|
a = b;
|
|
b = n;
|
|
}
|
|
|
|
n = idl_alloc( ID_BLOCK_NIDS(a) + ID_BLOCK_NIDS(b) );
|
|
|
|
for ( ni = 0, ai = 0, bi = 0;
|
|
ai < ID_BLOCK_NIDS(a) && bi < ID_BLOCK_NIDS(b);
|
|
)
|
|
{
|
|
if ( ID_BLOCK_ID(a, ai) < ID_BLOCK_ID(b, bi) ) {
|
|
ID_BLOCK_ID(n, ni++) = ID_BLOCK_ID(a, ai++);
|
|
|
|
} else if ( ID_BLOCK_ID(b, bi) < ID_BLOCK_ID(a, ai) ) {
|
|
ID_BLOCK_ID(n, ni++) = ID_BLOCK_ID(b, bi++);
|
|
|
|
} else {
|
|
ID_BLOCK_ID(n, ni++) = ID_BLOCK_ID(a, ai);
|
|
ai++, bi++;
|
|
}
|
|
}
|
|
|
|
for ( ; ai < ID_BLOCK_NIDS(a); ai++ ) {
|
|
ID_BLOCK_ID(n, ni++) = ID_BLOCK_ID(a, ai);
|
|
}
|
|
for ( ; bi < ID_BLOCK_NIDS(b); bi++ ) {
|
|
ID_BLOCK_ID(n, ni++) = ID_BLOCK_ID(b, bi);
|
|
}
|
|
ID_BLOCK_NIDS(n) = ni;
|
|
|
|
return( n );
|
|
}
|
|
|
|
|
|
/*
|
|
* idl_notin - return a intersection ~b (or a minus b)
|
|
*/
|
|
ID_BLOCK *
|
|
idl_notin(
|
|
Backend *be,
|
|
ID_BLOCK *a,
|
|
ID_BLOCK *b
|
|
)
|
|
{
|
|
unsigned int ni, ai, bi;
|
|
ID_BLOCK *n;
|
|
|
|
if ( a == NULL ) {
|
|
return( NULL );
|
|
}
|
|
if ( b == NULL || ID_BLOCK_ALLIDS( b )) {
|
|
return( idl_dup( a ) );
|
|
}
|
|
|
|
if ( ID_BLOCK_ALLIDS( a ) ) {
|
|
n = idl_alloc( SLAPD_LDBM_MIN_MAXIDS );
|
|
ni = 0;
|
|
|
|
for ( ai = 1, bi = 0;
|
|
ai < ID_BLOCK_NIDS(a) && ni < ID_BLOCK_NMAX(n) && bi < ID_BLOCK_NMAX(b);
|
|
ai++ )
|
|
{
|
|
if ( ID_BLOCK_ID(b, bi) == ai ) {
|
|
bi++;
|
|
} else {
|
|
ID_BLOCK_ID(n, ni++) = ai;
|
|
}
|
|
}
|
|
|
|
for ( ; ai < ID_BLOCK_NIDS(a) && ni < ID_BLOCK_NMAX(n); ai++ ) {
|
|
ID_BLOCK_ID(n, ni++) = ai;
|
|
}
|
|
|
|
if ( ni == ID_BLOCK_NMAX(n) ) {
|
|
idl_free( n );
|
|
return( idl_allids( be ) );
|
|
} else {
|
|
ID_BLOCK_NIDS(n) = ni;
|
|
return( n );
|
|
}
|
|
}
|
|
|
|
n = idl_dup( a );
|
|
|
|
ni = 0;
|
|
for ( ai = 0, bi = 0; ai < ID_BLOCK_NIDS(a); ai++ ) {
|
|
for ( ;
|
|
bi < ID_BLOCK_NIDS(b) && ID_BLOCK_ID(b, bi) < ID_BLOCK_ID(a, ai);
|
|
bi++ )
|
|
{
|
|
; /* NULL */
|
|
}
|
|
|
|
if ( bi == ID_BLOCK_NIDS(b) ) {
|
|
break;
|
|
}
|
|
|
|
if ( ID_BLOCK_ID(b, bi) != ID_BLOCK_ID(a, ai) ) {
|
|
ID_BLOCK_ID(n, ni++) = ID_BLOCK_ID(a, ai);
|
|
}
|
|
}
|
|
|
|
for ( ; ai < ID_BLOCK_NIDS(a); ai++ ) {
|
|
ID_BLOCK_ID(n, ni++) = ID_BLOCK_ID(a, ai);
|
|
}
|
|
ID_BLOCK_NIDS(n) = ni;
|
|
|
|
return( n );
|
|
}
|
|
|
|
/* return the first ID in the block
|
|
* if ALLIDS block
|
|
* NIDS > 1 return 1
|
|
* otherwise return NOID
|
|
* otherwise return first ID
|
|
*
|
|
* cursor is set to 1
|
|
*/
|
|
ID
|
|
idl_firstid( ID_BLOCK *idl, ID *cursor )
|
|
{
|
|
*cursor = 1;
|
|
|
|
if ( idl == NULL || ID_BLOCK_NIDS(idl) == 0 ) {
|
|
return( NOID );
|
|
}
|
|
|
|
if ( ID_BLOCK_ALLIDS( idl ) ) {
|
|
return( ID_BLOCK_NIDS(idl) > 1 ? 1 : NOID );
|
|
}
|
|
|
|
return( ID_BLOCK_ID(idl, 0) );
|
|
}
|
|
|
|
/* return next ID
|
|
* if ALLIDS block, cursor is id.
|
|
* increment id
|
|
* if id < NIDS return id
|
|
* otherwise NOID.
|
|
* otherwise cursor is index into block
|
|
* if index < nids
|
|
* return id at index then increment
|
|
*/
|
|
ID
|
|
idl_nextid( ID_BLOCK *idl, ID *cursor )
|
|
{
|
|
if ( ID_BLOCK_ALLIDS( idl ) ) {
|
|
if( ++(*cursor) < ID_BLOCK_NIDS(idl) ) {
|
|
return *cursor;
|
|
} else {
|
|
return NOID;
|
|
}
|
|
}
|
|
|
|
if ( *cursor < ID_BLOCK_NIDS(idl) ) {
|
|
return( ID_BLOCK_ID(idl, (*cursor)++) );
|
|
}
|
|
|
|
return( NOID );
|
|
}
|