/* 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 bdb_idl_append( ID *a, ID *b )
{
ID ida, idb, tmp, swap = 0;
if ( BDB_IDL_IS_ZERO( b ) ) {
return 0;
}
if ( BDB_IDL_IS_ZERO( a ) ) {
BDB_IDL_CPY( a, b );
return 0;
}
if ( b[0] == 1 ) {
return bdb_idl_append_one( a, BDB_IDL_FIRST( b ));
}
ida = BDB_IDL_LAST( a );
idb = BDB_IDL_LAST( b );
if ( BDB_IDL_IS_RANGE( a ) || BDB_IDL_IS_RANGE(b) ||
a[0] + b[0] >= BDB_IDL_UM_MAX ) {
a[2] = IDL_MAX( ida, idb );
a[1] = IDL_MIN( a[1], b[1] );
a[0] = NOID;
return 0;
}
if ( 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;
{
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;
}
/*
* bdb_idl_notin - return a intersection ~b (or a minus b)
*/
int
bdb_idl_notin(
ID *a,
ID *b,
ID *ids )
{
ID ida, idb;
ID cursora = 0, cursorb = 0;
if( BDB_IDL_IS_ZERO( a ) ||
BDB_IDL_IS_ZERO( b ) ||
BDB_IDL_IS_RANGE( b ) )
{
BDB_IDL_CPY( ids, a );
return 0;
}
if( BDB_IDL_IS_RANGE( a ) ) {
BDB_IDL_CPY( ids, a );
return 0;
}
ida = bdb_idl_first( a, &cursora ),
idb = bdb_idl_first( b, &cursorb );
ids[0] = 0;
while( ida != NOID ) {
if ( idb == NOID ) {
/* we could shortcut this */
ids[++ids[0]] = ida;
ida = bdb_idl_next( a, &cursora );
} else if ( ida < idb ) {
ids[++ids[0]] = ida;
ida = bdb_idl_next( a, &cursora );
} else if ( ida > idb ) {
idb = bdb_idl_next( b, &cursorb );
} else {
ida = bdb_idl_next( a, &cursora );
idb = bdb_idl_next( b, &cursorb );
}
}
return 0;
}
/* Add one ID to an unsorted list. We ensure that the first element is the
* minimum and the last element is the maximum, for fast range compaction.
* this means IDLs up to length 3 are always sorted...
*/
int bdb_idl_append_one( ID *ids, ID id )
{
if (BDB_IDL_IS_RANGE( ids )) {
/* if already in range, treat as a dup */
if (id >= BDB_IDL_FIRST(ids) && id <= BDB_IDL_LAST(ids))
return -1;
if (id < BDB_IDL_FIRST(ids))
ids[1] = id;
else if (id > BDB_IDL_LAST(ids))
ids[2] = id;
return 0;
}
if ( ids[0] ) {
ID tmp;
if (id < ids[1]) {
tmp = ids[1];
ids[1] = id;
id = tmp;
}
if ( ids[0] > 1 && id < ids[ids[0]] ) {
tmp = ids[ids[0]];
ids[ids[0]] = id;
id = tmp;
}
}
ids[0]++;
if ( ids[0] >= BDB_IDL_UM_MAX ) {
ids[0] = NOID;
ids[2] = id;
} else {
ids[ids[0]] = id;
}
return 0;
}
int bdb_idl_insert( ID *ids, ID id )
{
unsigned x;
#if IDL_DEBUG > 1
Debug( LDAP_DEBUG_ANY, "insert: %04lx at %d\n", (long) id, x, 0 );
idl_dump( ids );
#elif IDL_DEBUG > 0
idl_check( ids );
#endif
if (BDB_IDL_IS_RANGE( ids )) {
/* if already in range, treat as a dup */
if (id >= BDB_IDL_FIRST(ids) && id <= BDB_IDL_LAST(ids))
return -1;
if (id < BDB_IDL_FIRST(ids))
ids[1] = id;
else if (id > BDB_IDL_LAST(ids))
ids[2] = id;
return 0;
}
x = bdb_idl_search( ids, id );
assert( x > 0 );
if( x < 1 ) {
/* internal error */
return -2;
}
if ( x <= ids[0] && ids[x] == id ) {
/* duplicate */
return -1;
}
if ( ++ids[0] >= BDB_IDL_DB_MAX ) {
if( id < ids[1] ) {
ids[1] = id;
ids[2] = ids[ids[0]-1];
} else if ( ids[ids[0]-1] < id ) {
ids[2] = id;
} else {
ids[2] = ids[ids[0]-1];
}
ids[0] = NOID;
} else {
/* insert id */
AC_MEMCPY( &ids[x+1], &ids[x], (ids[0]-x) * sizeof(ID) );
ids[x] = id;
}
#if IDL_DEBUG > 1
idl_dump( ids );
#elif IDL_DEBUG > 0
idl_check( ids );
#endif
return 0;
}
ID bdb_idl_first( ID *ids, ID *cursor )
{
ID pos;
if ( ids[0] == 0 ) {
*cursor = NOID;
return NOID;
}
if ( BDB_IDL_IS_RANGE( ids ) ) {
if( *cursor < ids[1] ) {
*cursor = ids[1];
}
return *cursor;
}
if ( *cursor == 0 )
pos = 1;
else
pos = bdb_idl_search( ids, *cursor );
if( pos > ids[0] ) {
return NOID;
}
*cursor = pos;
return ids[pos];
}
static int bdb_idl_delete( ID *ids, ID id )
{
unsigned x;
#if IDL_DEBUG > 1
Debug( LDAP_DEBUG_ANY, "delete: %04lx at %d\n", (long) id, x, 0 );
idl_dump( ids );
#elif IDL_DEBUG > 0
idl_check( ids );
#endif
if (BDB_IDL_IS_RANGE( ids )) {
/* If deleting a range boundary, adjust */
if ( ids[1] == id )
ids[1]++;
else if ( ids[2] == id )
ids[2]--;
/* deleting from inside a range is a no-op */
/* If the range has collapsed, re-adjust */
if ( ids[1] > ids[2] )
ids[0] = 0;
else if ( ids[1] == ids[2] )
ids[1] = 1;
return 0;
}
x = bdb_idl_search( ids, id );
assert( x > 0 );
if( x <= 0 ) {
/* internal error */
return -2;
}
if( x > ids[0] || ids[x] != id ) {
/* not found */
return -1;
} else if ( --ids[0] == 0 ) {
if( x != 1 ) {
return -3;
}
} else {
AC_MEMCPY( &ids[x], &ids[x+1], (1+ids[0]-x) * sizeof(ID) );
}
#if IDL_DEBUG > 1
idl_dump( ids );
#elif IDL_DEBUG > 0
idl_check( ids );
#endif
return 0;
}
static void idl_check( ID *ids )
{
if( BDB_IDL_IS_RANGE( ids ) ) {
assert( BDB_IDL_RANGE_FIRST(ids) <= BDB_IDL_RANGE_LAST(ids) );
} else {
ID i;
for( i=1; i < ids[0]; i++ ) {
assert( ids[i+1] > ids[i] );
}
}
}
ID bdb_idl_next( ID *ids, ID *cursor )
{
if ( BDB_IDL_IS_RANGE( ids ) ) {
if( ids[2] < ++(*cursor) ) {
return NOID;
}
return *cursor;
}
if ( ++(*cursor) <= ids[0] ) {
return ids[*cursor];
}
return NOID;
}
static void idl_dump( ID *ids )
{
if( BDB_IDL_IS_RANGE( ids ) ) {
#ifdef NEW_LOGGING
LDAP_LOG( INDEX, INFO, "IDL: range (%ld - %ld)\n",
(long) BDB_IDL_RANGE_FIRST( ids ),
(long) BDB_IDL_RANGE_LAST( ids ), 0 );
#else
Debug( LDAP_DEBUG_ANY,
"IDL: range ( %ld - %ld )\n",
(long) BDB_IDL_RANGE_FIRST( ids ),
(long) BDB_IDL_RANGE_LAST( ids ) );
#endif
} else {
ID i;
#ifdef NEW_LOGGING
LDAP_LOG( INDEX, INFO, "IDL: size %ld", (long) ids[0], 0, 0 );
#else
Debug( LDAP_DEBUG_ANY, "IDL: size %ld", (long) ids[0], 0, 0 );
#endif
for( i=1; i<=ids[0]; i++ ) {
if( i % 16 == 1 ) {
Debug( LDAP_DEBUG_ANY, "\n", 0, 0, 0 );
}
#ifdef NEW_LOGGING
LDAP_LOG( INDEX, INFO, "%02lx",(long)ids[i], 0, 0 );
#else
Debug( LDAP_DEBUG_ANY, " %02lx", (long) ids[i], 0, 0 );
#endif
}
Debug( LDAP_DEBUG_ANY, "\n", 0, 0, 0 );
}
idl_check( ids );
}
void
bdb_idl_cache_add_id(
struct bdb_info *bdb,
DB *db,
DBT *key,
ID id )
{
bdb_idl_cache_entry_t *cache_entry, idl_tmp;
DBT2bv( key, &idl_tmp.kstr );
idl_tmp.db = db;
ldap_pvt_thread_rdwr_wlock( &bdb->bi_idl_tree_rwlock );
cache_entry = avl_find( bdb->bi_idl_tree, &idl_tmp,
bdb_idl_entry_cmp );
if ( cache_entry != NULL ) {
if ( !BDB_IDL_IS_RANGE( cache_entry->idl ) &&
cache_entry->idl[0] < BDB_IDL_DB_MAX ) {
size_t s = BDB_IDL_SIZEOF( cache_entry->idl ) + sizeof(ID);
cache_entry->idl = ch_realloc( cache_entry->idl, s );
}
bdb_idl_insert( cache_entry->idl, id );
}
ldap_pvt_thread_rdwr_wunlock( &bdb->bi_idl_tree_rwlock );
}
static void idl_dump( ID *ids )
{
if( BDB_IDL_IS_RANGE( ids ) ) {
Debug( LDAP_DEBUG_ANY,
"IDL: range ( %ld - %ld )\n",
(long) BDB_IDL_RANGE_FIRST( ids ),
(long) BDB_IDL_RANGE_LAST( ids ) );
} else {
ID i;
Debug( LDAP_DEBUG_ANY, "IDL: size %ld", (long) ids[0], 0, 0 );
for( i=1; i<=ids[0]; i++ ) {
if( i % 16 == 1 ) {
Debug( LDAP_DEBUG_ANY, "\n", 0, 0, 0 );
}
Debug( LDAP_DEBUG_ANY, " %02lx", (long) ids[i], 0, 0 );
}
Debug( LDAP_DEBUG_ANY, "\n", 0, 0, 0 );
}
idl_check( ids );
}
int
hdb_dn2idl(
Operation *op,
DB_TXN *txn,
struct berval *ndn,
EntryInfo *ei,
ID *ids,
ID *stack )
{
struct bdb_info *bdb = (struct bdb_info *)op->o_bd->be_private;
struct dn2id_cookie cx;
Debug( LDAP_DEBUG_TRACE, "=> hdb_dn2idl(\"%s\")\n",
ndn->bv_val, 0, 0 );
#ifndef BDB_MULTIPLE_SUFFIXES
if ( op->ors_scope != LDAP_SCOPE_ONELEVEL &&
( ei->bei_id == 0 ||
( ei->bei_parent->bei_id == 0 && op->o_bd->be_suffix[0].bv_len )))
{
BDB_IDL_ALL( bdb, ids );
return 0;
}
#endif
cx.id = ei->bei_id;
BDB_ID2DISK( cx.id, &cx.nid );
cx.ei = ei;
cx.bdb = bdb;
cx.db = cx.bdb->bi_dn2id->bdi_db;
cx.prefix = (op->ors_scope == LDAP_SCOPE_ONELEVEL) ?
DN_ONE_PREFIX : DN_SUBTREE_PREFIX;
cx.ids = ids;
cx.tmp = stack;
cx.buf = stack + BDB_IDL_UM_SIZE;
cx.op = op;
cx.txn = txn;
cx.need_sort = 0;
cx.depth = 0;
if ( cx.prefix == DN_SUBTREE_PREFIX ) {
ids[0] = 1;
ids[1] = cx.id;
} else {
BDB_IDL_ZERO( ids );
}
if ( cx.ei->bei_state & CACHE_ENTRY_NO_KIDS )
return LDAP_SUCCESS;
DBTzero(&cx.key);
cx.key.ulen = sizeof(ID);
cx.key.size = sizeof(ID);
cx.key.flags = DB_DBT_USERMEM;
DBTzero(&cx.data);
hdb_dn2idl_internal(&cx);
if ( cx.need_sort ) {
char *ptr = ((char *)&cx.id)-1;
if ( !BDB_IDL_IS_RANGE( cx.ids ) && cx.ids[0] > 3 )
bdb_idl_sort( cx.ids, cx.tmp );
cx.key.data = ptr;
cx.key.size = sizeof(ID)+1;
*ptr = cx.prefix;
cx.id = ei->bei_id;
if ( cx.bdb->bi_idl_cache_max_size )
bdb_idl_cache_put( cx.bdb, cx.db, &cx.key, cx.ids, cx.rc );
}
if ( cx.rc == DB_NOTFOUND )
cx.rc = LDAP_SUCCESS;
return cx.rc;
}
static int
hdb_dn2idl_internal(
struct dn2id_cookie *cx
)
{
BDB_IDL_ZERO( cx->tmp );
if ( cx->bdb->bi_idl_cache_size ) {
char *ptr = ((char *)&cx->id)-1;
cx->key.data = ptr;
cx->key.size = sizeof(ID)+1;
if ( cx->prefix == DN_SUBTREE_PREFIX ) {
ID *ids = cx->depth ? cx->tmp : cx->ids;
*ptr = cx->prefix;
cx->rc = bdb_idl_cache_get(cx->bdb, cx->db, &cx->key, ids);
if ( cx->rc == LDAP_SUCCESS ) {
if ( cx->depth ) {
bdb_idl_delete( cx->tmp, cx->id ); /* ITS#6983, drop our own ID */
bdb_idl_append( cx->ids, cx->tmp );
cx->need_sort = 1;
}
return cx->rc;
}
}
*ptr = DN_ONE_PREFIX;
cx->rc = bdb_idl_cache_get(cx->bdb, cx->db, &cx->key, cx->tmp);
if ( cx->rc == LDAP_SUCCESS ) {
goto gotit;
}
if ( cx->rc == DB_NOTFOUND ) {
return cx->rc;
}
}
bdb_cache_entryinfo_lock( cx->ei );
/* If number of kids in the cache differs from on-disk, load
* up all the kids from the database
*/
if ( cx->ei->bei_ckids+1 != cx->ei->bei_dkids ) {
EntryInfo ei;
db_recno_t dkids = cx->ei->bei_dkids;
ei.bei_parent = cx->ei;
/* Only one thread should load the cache */
while ( cx->ei->bei_state & CACHE_ENTRY_ONELEVEL ) {
bdb_cache_entryinfo_unlock( cx->ei );
ldap_pvt_thread_yield();
bdb_cache_entryinfo_lock( cx->ei );
if ( cx->ei->bei_ckids+1 == cx->ei->bei_dkids ) {
goto synced;
}
}
cx->ei->bei_state |= CACHE_ENTRY_ONELEVEL;
bdb_cache_entryinfo_unlock( cx->ei );
cx->rc = cx->db->cursor( cx->db, NULL, &cx->dbc,
cx->bdb->bi_db_opflags );
if ( cx->rc )
goto done_one;
cx->data.data = &cx->dbuf;
cx->data.ulen = sizeof(ID);
cx->data.dlen = sizeof(ID);
cx->data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL;
/* The first item holds the parent ID. Ignore it. */
cx->key.data = &cx->nid;
cx->key.size = sizeof(ID);
cx->rc = cx->dbc->c_get( cx->dbc, &cx->key, &cx->data, DB_SET );
if ( cx->rc ) {
cx->dbc->c_close( cx->dbc );
goto done_one;
}
/* If the on-disk count is zero we've never checked it.
* Count it now.
*/
if ( !dkids ) {
cx->dbc->c_count( cx->dbc, &dkids, 0 );
cx->ei->bei_dkids = dkids;
}
cx->data.data = cx->buf;
cx->data.ulen = BDB_IDL_UM_SIZE * sizeof(ID);
cx->data.flags = DB_DBT_USERMEM;
if ( dkids > 1 ) {
/* Fetch the rest of the IDs in a loop... */
while ( (cx->rc = cx->dbc->c_get( cx->dbc, &cx->key, &cx->data,
DB_MULTIPLE | DB_NEXT_DUP )) == 0 ) {
u_int8_t *j;
size_t len;
void *ptr;
DB_MULTIPLE_INIT( ptr, &cx->data );
while (ptr) {
DB_MULTIPLE_NEXT( ptr, &cx->data, j, len );
if (j) {
EntryInfo *ei2;
diskNode *d = (diskNode *)j;
short nrlen;
BDB_DISK2ID( j + len - sizeof(ID), &ei.bei_id );
nrlen = ((d->nrdnlen[0] ^ 0x80) << 8) | d->nrdnlen[1];
ei.bei_nrdn.bv_len = nrlen;
/* nrdn/rdn are set in-place.
* hdb_cache_load will copy them as needed
*/
ei.bei_nrdn.bv_val = d->nrdn;
ei.bei_rdn.bv_len = len - sizeof(diskNode)
- ei.bei_nrdn.bv_len;
ei.bei_rdn.bv_val = d->nrdn + ei.bei_nrdn.bv_len + 1;
bdb_idl_append_one( cx->tmp, ei.bei_id );
hdb_cache_load( cx->bdb, &ei, &ei2 );
}
}
}
}
cx->rc = cx->dbc->c_close( cx->dbc );
done_one:
bdb_cache_entryinfo_lock( cx->ei );
cx->ei->bei_state &= ~CACHE_ENTRY_ONELEVEL;
bdb_cache_entryinfo_unlock( cx->ei );
if ( cx->rc )
return cx->rc;
} else {
/* The in-memory cache is in sync with the on-disk data.
* do we have any kids?
*/
synced:
cx->rc = 0;
if ( cx->ei->bei_ckids > 0 ) {
/* Walk the kids tree; order is irrelevant since bdb_idl_sort
* will sort it later.
*/
avl_apply( cx->ei->bei_kids, apply_func,
cx->tmp, -1, AVL_POSTORDER );
}
bdb_cache_entryinfo_unlock( cx->ei );
}
if ( !BDB_IDL_IS_RANGE( cx->tmp ) && cx->tmp[0] > 3 )
bdb_idl_sort( cx->tmp, cx->buf );
if ( cx->bdb->bi_idl_cache_max_size && !BDB_IDL_IS_ZERO( cx->tmp )) {
char *ptr = ((char *)&cx->id)-1;
cx->key.data = ptr;
cx->key.size = sizeof(ID)+1;
*ptr = DN_ONE_PREFIX;
bdb_idl_cache_put( cx->bdb, cx->db, &cx->key, cx->tmp, cx->rc );
}
gotit:
if ( !BDB_IDL_IS_ZERO( cx->tmp )) {
if ( cx->prefix == DN_SUBTREE_PREFIX ) {
bdb_idl_append( cx->ids, cx->tmp );
cx->need_sort = 1;
if ( !(cx->ei->bei_state & CACHE_ENTRY_NO_GRANDKIDS)) {
ID *save, idcurs;
EntryInfo *ei = cx->ei;
int nokids = 1;
save = cx->op->o_tmpalloc( BDB_IDL_SIZEOF( cx->tmp ),
cx->op->o_tmpmemctx );
BDB_IDL_CPY( save, cx->tmp );
idcurs = 0;
cx->depth++;
for ( cx->id = bdb_idl_first( save, &idcurs );
cx->id != NOID;
cx->id = bdb_idl_next( save, &idcurs )) {
EntryInfo *ei2;
cx->ei = NULL;
if ( bdb_cache_find_id( cx->op, cx->txn, cx->id, &cx->ei,
ID_NOENTRY, NULL ))
continue;
if ( cx->ei ) {
ei2 = cx->ei;
if ( !( ei2->bei_state & CACHE_ENTRY_NO_KIDS )) {
BDB_ID2DISK( cx->id, &cx->nid );
hdb_dn2idl_internal( cx );
if ( !BDB_IDL_IS_ZERO( cx->tmp ))
nokids = 0;
}
bdb_cache_entryinfo_lock( ei2 );
ei2->bei_finders--;
bdb_cache_entryinfo_unlock( ei2 );
}
}
cx->depth--;
cx->op->o_tmpfree( save, cx->op->o_tmpmemctx );
if ( nokids ) {
bdb_cache_entryinfo_lock( ei );
ei->bei_state |= CACHE_ENTRY_NO_GRANDKIDS;
bdb_cache_entryinfo_unlock( ei );
}
}
/* Make sure caller knows it had kids! */
cx->tmp[0]=1;
cx->rc = 0;
} else {
BDB_IDL_CPY( cx->ids, cx->tmp );
}
}
return cx->rc;
}
/*
* idl_intersection - return a = a intersection b
*/
int
bdb_idl_intersection(
ID *a,
ID *b )
{
ID ida, idb;
ID idmax, idmin;
ID cursora = 0, cursorb = 0, cursorc;
int swap = 0;
if ( BDB_IDL_IS_ZERO( a ) || BDB_IDL_IS_ZERO( b ) ) {
a[0] = 0;
return 0;
}
idmin = IDL_MAX( BDB_IDL_FIRST(a), BDB_IDL_FIRST(b) );
idmax = IDL_MIN( BDB_IDL_LAST(a), BDB_IDL_LAST(b) );
if ( idmin > idmax ) {
a[0] = 0;
return 0;
} else if ( idmin == idmax ) {
a[0] = 1;
a[1] = idmin;
return 0;
}
if ( BDB_IDL_IS_RANGE( a ) ) {
if ( BDB_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 ( BDB_IDL_IS_RANGE( b )
&& BDB_IDL_FIRST( b ) <= BDB_IDL_FIRST( a )
&& BDB_IDL_LAST( b ) >= BDB_IDL_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 = bdb_idl_first( a, &cursora );
idb = bdb_idl_first( b, &cursorb );
cursorc = 0;
while( ida <= idmax || idb <= idmax ) {
if( ida == idb ) {
a[++cursorc] = ida;
ida = bdb_idl_next( a, &cursora );
idb = bdb_idl_next( b, &cursorb );
} else if ( ida < idb ) {
ida = bdb_idl_next( a, &cursora );
} else {
idb = bdb_idl_next( b, &cursorb );
}
}
a[0] = cursorc;
done:
if (swap)
BDB_IDL_CPY( b, a );
return 0;
}
void
bdb_idl_sort( ID *ids, ID *tmp )
{
int count, soft_limit, phase = 0, size = ids[0];
ID *idls[2];
unsigned char *maxv = (unsigned char *)&ids[size];
if ( BDB_IDL_IS_RANGE( ids ))
return;
/* Use insertion sort for small lists */
if ( size <= SMALL ) {
int i,j;
ID a;
for (j=1;j<=size;j++) {
a = ids[j];
for (i=j-1;i>=1;i--) {
if (ids[i] <= a) break;
ids[i+1] = ids[i];
}
ids[i+1] = a;
}
return;
}
tmp[0] = size;
idls[0] = ids;
idls[1] = tmp;
#if BYTE_ORDER == BIG_ENDIAN
for (soft_limit = 0; !maxv[soft_limit]; soft_limit++);
#else
for (soft_limit = sizeof(ID)-1; !maxv[soft_limit]; soft_limit--);
#endif
for (
#if BYTE_ORDER == BIG_ENDIAN
count = sizeof(ID)-1; count >= soft_limit; --count
#else
count = 0; count <= soft_limit; ++count
#endif
) {
unsigned int num[BUCKETS], * np, n, sum;
int i;
ID *sp, *source, *dest;
unsigned char *bp, *source_start;
source = idls[phase]+1;
dest = idls[phase^1]+1;
source_start = ((unsigned char *) source) + count;
np = num;
for ( i = BUCKETS; i > 0; --i ) *np++ = 0;
/* count occurences of every byte value */
bp = source_start;
for ( i = size; i > 0; --i, bp += sizeof(ID) )
num[*bp]++;
/* transform count into index by summing elements and storing
* into same array
*/
sum = 0;
np = num;
for ( i = BUCKETS; i > 0; --i ) {
n = *np;
*np++ = sum;
sum += n;
}
/* fill dest with the right values in the right place */
bp = source_start;
sp = source;
for ( i = size; i > 0; --i, bp += sizeof(ID) ) {
np = num + *bp;
dest[*np] = *sp++;
++(*np);
}
phase ^= 1;
}
/* copy back from temp if needed */
if ( phase ) {
ids++; tmp++;
for ( count = 0; count < size; ++count )
*ids++ = *tmp++;
}
}
void
bdb_idl_sort( ID *ids, ID *tmp )
{
int *istack = (int *)tmp;
int i,j,k,l,ir,jstack;
ID a, itmp;
if ( BDB_IDL_IS_RANGE( ids ))
return;
ir = ids[0];
l = 1;
jstack = 0;
for(;;) {
if (ir - l < SMALL) { /* Insertion sort */
for (j=l+1;j<=ir;j++) {
a = ids[j];
for (i=j-1;i>=1;i--) {
if (ids[i] <= a) break;
ids[i+1] = ids[i];
}
ids[i+1] = a;
}
if (jstack == 0) break;
ir = istack[jstack--];
l = istack[jstack--];
} else {
k = (l + ir) >> 1; /* Choose median of left, center, right */
SWAP(ids[k], ids[l+1]);
if (ids[l] > ids[ir]) {
SWAP(ids[l], ids[ir]);
}
if (ids[l+1] > ids[ir]) {
SWAP(ids[l+1], ids[ir]);
}
if (ids[l] > ids[l+1]) {
SWAP(ids[l], ids[l+1]);
}
i = l+1;
j = ir;
a = ids[l+1];
for(;;) {
do i++; while(ids[i] < a);
do j--; while(ids[j] > a);
if (j < i) break;
SWAP(ids[i],ids[j]);
}
ids[l+1] = ids[j];
ids[j] = a;
jstack += 2;
if (ir-i+1 >= j-1) {
istack[jstack] = ir;
istack[jstack-1] = i;
ir = j-1;
} else {
istack[jstack] = j-1;
istack[jstack-1] = l;
l = i;
}
}
}
}
/*
* idl_union - return a = a union b
*/
int
bdb_idl_union(
ID *a,
ID *b )
{
ID ida, idb;
ID cursora = 0, cursorb = 0, cursorc;
if ( BDB_IDL_IS_ZERO( b ) ) {
return 0;
}
if ( BDB_IDL_IS_ZERO( a ) ) {
BDB_IDL_CPY( a, b );
return 0;
}
if ( BDB_IDL_IS_RANGE( a ) || BDB_IDL_IS_RANGE(b) ) {
over: ida = IDL_MIN( BDB_IDL_FIRST(a), BDB_IDL_FIRST(b) );
idb = IDL_MAX( BDB_IDL_LAST(a), BDB_IDL_LAST(b) );
a[0] = NOID;
a[1] = ida;
a[2] = idb;
return 0;
}
ida = bdb_idl_first( a, &cursora );
idb = bdb_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 > BDB_IDL_UM_MAX ) {
goto over;
}
b[cursorc] = ida;
ida = bdb_idl_next( a, &cursora );
} else {
if ( ida == idb )
ida = bdb_idl_next( a, &cursora );
idb = bdb_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;
}
