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authorUlrich Drepper <drepper@redhat.com>1998-06-09 15:16:55 +0000
committerUlrich Drepper <drepper@redhat.com>1998-06-09 15:16:55 +0000
commitbf7997b65c7887d2acda95f5201d818a19d81711 (patch)
treeda3583de3a0b5892f90a4b1eb773a87b554ae37e /db2/btree/bt_rsearch.c
parent7646e67e6cc4c738a7b402c60fed39d52db0433b (diff)
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Update.
1998-06-09 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/netinet/ip.h (struct ip_options): Define __data member only for gcc. Reported by ak@muc.de. * misc/mntent.h: Undo last patch. * sysdeps/unix/sysv/linux/fstatvfs.c (fstatvfs): Undo last patch. * misc/tst/mntent.c: Adjust code for this change. * io/fts.c: Updated from a slightly more recent BSD version. * io/fts.h: Likewise. * libc.map: Add __libc_stack_end. * db2/Makefile (routines): Add lock_region. * db2/config.h: Update from db-2.4.14. * db2/db.h: Likewise. * db2/db_185.h: Likewise. * db2/db_int.h: Likewise. * db2/bt_close.c: Likewise. * db2/bt_compare.c: Likewise. * db2/bt_conv.c: Likewise. * db2/bt_cursor.c: Likewise. * db2/bt_delete.c: Likewise. * db2/bt_open.c: Likewise. * db2/bt_page.c: Likewise. * db2/bt_put.c: Likewise. * db2/bt_rec.c: Likewise. * db2/bt_recno.c: Likewise. * db2/bt_rsearch.c: Likewise. * db2/bt_search.c: Likewise. * db2/bt_split.c: Likewise. * db2/bt_stat.c: Likewise. * db2/btree.src: Likewise. * db2/btree_auto.c: Likewise. * db2/getlong.c: Likewise. * db2/db_appinit.c: Likewise. * db2/db_apprec.c: Likewise. * db2/db_byteorder.c: Likewise. * db2/db_err.c: Likewise. * db2/db_log2.c: Likewise. * db2/db_region.c: Likewise. * db2/db_salloc.c: Likewise. * db2/db_shash.c: Likewise. * db2/db.c: Likewise. * db2/db.src: Likewise. * db2/db_auto.c: Likewise. * db2/db_conv.c: Likewise. * db2/db_dispatch.c: Likewise. * db2/db_dup.c: Likewise. * db2/db_overflow.c: Likewise. * db2/db_pr.c: Likewise. * db2/db_rec.c: Likewise. * db2/db_ret.c: Likewise. * db2/db_thread.c: Likewise. * db2/db185.c: Likewise. * db2/db185_int.h: Likewise. * db2/dbm.c: Likewise. * db2/hash.c: Likewise. * db2/hash.src: Likewise. * db2/hash_auto.c: Likewise. * db2/hash_conv.c: Likewise. * db2/hash_debug.c: Likewise. * db2/hash_dup.c: Likewise. * db2/hash_func.c: Likewise. * db2/hash_page.c: Likewise. * db2/hash_rec.c: Likewise. * db2/hash_stat.c: Likewise. * db2/btree.h: Likewise. * db2/btree_ext.h: Likewise. * db2/clib_ext.h: Likewise. * db2/common_ext.h: Likewise. * db2/cxx_int.h: Likewise. * db2/db.h.src: Likewise. * db2/db_185.h.src: Likewise. * db2/db_am.h: Likewise. * db2/db_auto.h: Likewise. * db2/db_cxx.h: Likewise. * db2/db_dispatch.h: Likewise. * db2/db_ext.h: Likewise. * db2/db_int.h.src: Likewise. * db2/db_page.h: Likewise. * db2/db_shash.h: Likewise. * db2/db_swap.h: Likewise. * db2/hash.h: Likewise. * db2/hash_ext.h: Likewise. * db2/lock.h: Likewise. * db2/lock_ext.h: Likewise. * db2/log.h: Likewise. * db2/log_ext.h: Likewise. * db2/mp.h: Likewise. * db2/mp_ext.h: Likewise. * db2/mutex_ext.h: Likewise. * db2/os_ext.h: Likewise. * db2/os_func.h: Likewise. * db2/queue.h: Likewise. * db2/shqueue.h: Likewise. * db2/txn.h: Likewise. * db2/lock.c: Likewise. * db2/lock_conflict.c: Likewise. * db2/lock_deadlock.c: Likewise. * db2/lock_region.c: Likewise. * db2/lock_util.c: Likewise. * db2/log.c: Likewise. * db2/log.src: Likewise. * db2/log_archive.c: Likewise. * db2/log_auto.c: Likewise. * db2/log_compare.c: Likewise. * db2/log_findckp.c: Likewise. * db2/log_get.c: Likewise. * db2/log_put.c: Likewise. * db2/log_rec.c: Likewise. * db2/log_register.c: Likewise. * db2/mp_bh.c: Likewise. * db2/mp_fget.c: Likewise. * db2/mp_fopen.c: Likewise. * db2/mp_fput.c: Likewise. * db2/mp_fset.c: Likewise. * db2/mp_open.c: Likewise. * db2/mp_pr.c: Likewise. * db2/mp_region.c: Likewise. * db2/mp_sync.c: Likewise. * db2/68020.gcc: Likewise. * db2/mutex.c: Likewise. * db2/parisc.gcc: Likewise. * db2/parisc.hp: Likewise. * db2/sco.cc: Likewise. * db2/os_abs.c: Likewise. * db2/os_alloc.c: Likewise. * db2/os_config.c: Likewise. * db2/os_dir.c: Likewise. * db2/os_fid.c: Likewise. * db2/os_fsync.c: Likewise. * db2/os_map.c: Likewise. * db2/os_oflags.c: Likewise. * db2/os_open.c: Likewise. * db2/os_rpath.c: Likewise. * db2/os_rw.c: Likewise. * db2/os_seek.c: Likewise. * db2/os_sleep.c: Likewise. * db2/os_spin.c: Likewise. * db2/os_stat.c: Likewise. * db2/os_unlink.c: Likewise. * db2/db_archive.c: Likewise. * db2/db_checkpoint.c: Likewise. * db2/db_deadlock.c: Likewise. * db2/db_dump.c: Likewise. * db2/db_dump185.c: Likewise. * db2/db_load.c: Likewise. * db2/db_printlog.c: Likewise. * db2/db_recover.c: Likewise. * db2/db_stat.c: Likewise. * db2/txn.c: Likewise. * db2/txn.src: Likewise. * db2/txn_auto.c: Likewise. * db2/txn_rec.c: Likewise. * elf/rtld.c: Move definition of __libc_stack_end to ... * sysdeps/generic/dl-sysdep.h: ...here. * sysdeps/unix/sysv/linux/fstatvfs.c: Handle nodiratime option. * sysdeps/unix/sysv/linux/bits/statvfs.h: Define ST_NODIRATIME. * sysdeps/unix/sysv/linux/sys/mount.h: Define MS_NODIRATIME. 1998-06-08 21:44 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/fstatvfs.c: Handle constant option string from mntent correctly. 1998-06-06 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sunrpc/Makefile (generated): Correct typo. 1998-06-04 Philip Blundell <philb@gnu.org> * elf/elf.h (EM_ARM, et al.): New definitions. * sysdeps/arm/dl-machine.h: Update for new draft ARM ELF ABI.
Diffstat (limited to 'db2/btree/bt_rsearch.c')
-rw-r--r--db2/btree/bt_rsearch.c98
1 files changed, 67 insertions, 31 deletions
diff --git a/db2/btree/bt_rsearch.c b/db2/btree/bt_rsearch.c
index ee26221e25..caa6b3515e 100644
--- a/db2/btree/bt_rsearch.c
+++ b/db2/btree/bt_rsearch.c
@@ -1,7 +1,7 @@
/*-
* See the file LICENSE for redistribution information.
*
- * Copyright (c) 1996, 1997
+ * Copyright (c) 1996, 1997, 1998
* Sleepycat Software. All rights reserved.
*/
/*
@@ -44,14 +44,11 @@
#include "config.h"
#ifndef lint
-static const char sccsid[] = "@(#)bt_rsearch.c 10.8 (Sleepycat) 8/24/97";
+static const char sccsid[] = "@(#)bt_rsearch.c 10.15 (Sleepycat) 5/6/98";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
-
-#include <stdio.h>
-#include <stdlib.h>
#endif
#include "db_int.h"
@@ -62,13 +59,13 @@ static const char sccsid[] = "@(#)bt_rsearch.c 10.8 (Sleepycat) 8/24/97";
* __bam_rsearch --
* Search a btree for a record number.
*
- * PUBLIC: int __bam_rsearch __P((DB *, db_recno_t *, u_int, int, int *));
+ * PUBLIC: int __bam_rsearch __P((DB *, db_recno_t *, u_int32_t, int, int *));
*/
int
__bam_rsearch(dbp, recnop, flags, stop, exactp)
DB *dbp;
db_recno_t *recnop;
- u_int flags;
+ u_int32_t flags;
int stop, *exactp;
{
BINTERNAL *bi;
@@ -78,7 +75,7 @@ __bam_rsearch(dbp, recnop, flags, stop, exactp)
RINTERNAL *ri;
db_indx_t indx, top;
db_pgno_t pg;
- db_recno_t recno, total;
+ db_recno_t i, recno, total;
int isappend, ret, stack;
t = dbp->internal;
@@ -136,8 +133,7 @@ __bam_rsearch(dbp, recnop, flags, stop, exactp)
*exactp = 1;
else {
*exactp = 0;
- if (flags == S_DELETE ||
- flags == S_FIND || recno > total + 1) {
+ if (!PAST_END_OK(flags) || recno > total + 1) {
(void)memp_fput(dbp->mpf, h, 0);
(void)__BT_LPUT(dbp, lock);
return (DB_NOTFOUND);
@@ -164,30 +160,65 @@ __bam_rsearch(dbp, recnop, flags, stop, exactp)
stack = 1;
}
- /* Records in the tree are 0-based, and record numbers are 1-based. */
- --recno;
-
+ /*
+ * !!!
+ * Record numbers in the tree are 0-based, but the recno is
+ * 1-based. All of the calculations below have to take this
+ * into account.
+ */
for (total = 0;;) {
switch (TYPE(h)) {
case P_LBTREE:
- BT_STK_ENTER(t, h, (recno - total) * P_INDX, lock, ret);
+ recno -= total;
+
+ /*
+ * There may be logically deleted records on the page,
+ * walk the page correcting for them. The record may
+ * not exist if there are enough deleted records in the
+ * page.
+ */
+ if (recno <= NUM_ENT(h))
+ for (i = recno - 1;; --i) {
+ if (B_DISSET(GET_BKEYDATA(h,
+ i * P_INDX + O_INDX)->type))
+ ++recno;
+ if (i == 0)
+ break;
+ }
+ if (recno > NUM_ENT(h)) {
+ *exactp = 0;
+ if (!PAST_END_OK(flags) ||
+ recno > (db_recno_t)(NUM_ENT(h) + 1)) {
+ ret = DB_NOTFOUND;
+ goto err;
+ }
+
+ }
+
+ /* Correct from 1-based to 0-based for a page offset. */
+ --recno;
+ BT_STK_ENTER(t, h, recno * P_INDX, lock, ret);
return (ret);
case P_IBTREE:
for (indx = 0, top = NUM_ENT(h);;) {
bi = GET_BINTERNAL(h, indx);
- if (++indx == top || total + bi->nrecs > recno)
+ if (++indx == top || total + bi->nrecs >= recno)
break;
total += bi->nrecs;
}
pg = bi->pgno;
break;
case P_LRECNO:
- BT_STK_ENTER(t, h, recno - total, lock, ret);
+ recno -= total;
+
+ /* Correct from 1-based to 0-based for a page offset. */
+ --recno;
+ BT_STK_ENTER(t, h, recno, lock, ret);
return (ret);
case P_IRECNO:
for (indx = 0, top = NUM_ENT(h);;) {
ri = GET_RINTERNAL(h, indx);
- if (++indx == top || total + ri->nrecs > recno)
+ if (++indx == top || total + ri->nrecs >= recno)
break;
total += ri->nrecs;
}
@@ -244,13 +275,13 @@ err: BT_STK_POP(t);
* __bam_adjust --
* Adjust the tree after adding or deleting a record.
*
- * PUBLIC: int __bam_adjust __P((DB *, BTREE *, int));
+ * PUBLIC: int __bam_adjust __P((DB *, BTREE *, int32_t));
*/
int
__bam_adjust(dbp, t, adjust)
DB *dbp;
BTREE *t;
- int adjust;
+ int32_t adjust;
{
EPG *epg;
PAGE *h;
@@ -264,7 +295,7 @@ __bam_adjust(dbp, t, adjust)
(ret = __bam_cadjust_log(dbp->dbenv->lg_info,
dbp->txn, &LSN(h), 0, dbp->log_fileid,
PGNO(h), &LSN(h), (u_int32_t)epg->indx,
- (int32_t)adjust, 1)) != 0)
+ adjust, 1)) != 0)
return (ret);
if (TYPE(h) == P_IBTREE)
@@ -322,26 +353,31 @@ db_recno_t
__bam_total(h)
PAGE *h;
{
- db_recno_t recs;
- db_indx_t nxt, top;
+ db_recno_t nrecs;
+ db_indx_t indx, top;
+
+ nrecs = 0;
+ top = NUM_ENT(h);
switch (TYPE(h)) {
case P_LBTREE:
- recs = NUM_ENT(h) / 2;
+ /* Check for logically deleted records. */
+ for (indx = 0; indx < top; indx += P_INDX)
+ if (!B_DISSET(GET_BKEYDATA(h, indx + O_INDX)->type))
+ ++nrecs;
break;
case P_IBTREE:
- for (recs = 0, nxt = 0, top = NUM_ENT(h); nxt < top; ++nxt)
- recs += GET_BINTERNAL(h, nxt)->nrecs;
+ for (indx = 0; indx < top; indx += O_INDX)
+ nrecs += GET_BINTERNAL(h, indx)->nrecs;
break;
case P_LRECNO:
- recs = NUM_ENT(h);
+ nrecs = NUM_ENT(h);
break;
case P_IRECNO:
- for (recs = 0, nxt = 0, top = NUM_ENT(h); nxt < top; ++nxt)
- recs += GET_RINTERNAL(h, nxt)->nrecs;
+ for (indx = 0; indx < top; indx += O_INDX)
+ nrecs += GET_RINTERNAL(h, indx)->nrecs;
break;
- default:
- abort();
}
- return (recs);
+
+ return (nrecs);
}