diff options
author | Ulrich Drepper <drepper@redhat.com> | 1998-06-09 15:16:55 +0000 |
---|---|---|
committer | Ulrich Drepper <drepper@redhat.com> | 1998-06-09 15:16:55 +0000 |
commit | bf7997b65c7887d2acda95f5201d818a19d81711 (patch) | |
tree | da3583de3a0b5892f90a4b1eb773a87b554ae37e /db2/btree/bt_rsearch.c | |
parent | 7646e67e6cc4c738a7b402c60fed39d52db0433b (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.c | 98 |
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); } |