Update. cvs/libc-ud-970827

1997-08-10 19:17  Philip Blundell  <Philip.Blundell@pobox.com>

	* nss/nss_db/db-XXX.c: Include <db_185.h> not <db.h>.  Somebody
	should update this to use the new db API.
	* nss/nss_db/db-netgrp.c: Likewise.
	* nss/nss_db/db-alias.c: Likewise.
	* db2/Makefile: Makefile for db-2.x in glibc.

1997-08-27 21:20  Ulrich Drepper  <drepper@cygnus.com>

	* csu/Makefile (before-compile): New goal.  Make sure abi-tag.h
	is generated.
	[$(elf)=yes] (asm-CPPFLAGS): Make sure abi-tag.h file can be found.

	* Makeconfig [$(build-omitfp)=yes] (CFLAGS-.o): Add
	-D__USE_STRING_INLINES.
	* string/string.f: Move strnlen optimization after inclusion of
	<bits/string.h>.  Include <bits/string.h> only if __USE_STRING_INLINES
	is defined.
	* sysdeps/generic/memcpy.c: Undef memcpy to allow macro of this name
	in <bits/string.h>.
	* sysdeps/generic/memset.c: Likewise.
	* sysdeps/i386/string.h: i386 optimized string functions.
	* sysdeps/i386/i486string.h: i486+ optimized string functions.

	* Makefile (subdirs): Change db to db2.
	* shlib-versions: Bump libdb verion number to 3.
	* include/db.h: Include from db2 directory.
	* include/db_185.h: New file.
	* sysdeps/i386/Makefile [$(subdirs)=db2] (CPPFLAGS): Add macros
	to provide spinlock information for db2.
	* sysdeps/m68k/m68020/Makefile: New file.  Likewise.
	* sysdeps/sparc/Makefile: New file.  Likewise.
	* sysdeps/unix/sysv/linux/Makefile [$(subdirs)=db2] (CPPFLAGS):
	Add -DHAVE_LLSEEK.
	* db2/config.h: Hand-edited config file for db2 in glibc.
	* db2/compat.h: New file from db-2.3.4.
	* db2/db.h: Likewise.
	* db2/db_185.h: Likewise.
	* db2/db_int.h: Likewise.
	* db2/makedb.c: Likewise.
	* db2/btree/bt_close.c: Likewise.
	* db2/btree/bt_compare.c: Likewise.
	* db2/btree/bt_conv.c: Likewise.
	* db2/btree/bt_cursor.c: Likewise.
	* db2/btree/bt_delete.c: Likewise.
	* db2/btree/bt_open.c: Likewise.
	* db2/btree/bt_page.c: Likewise.
	* db2/btree/bt_put.c: Likewise.
	* db2/btree/bt_rec.c: Likewise.
	* db2/btree/bt_recno.c: Likewise.
	* db2/btree/btree_auto.c: Likewise.
	* db2/btree/bt_rsearch.c: Likewise.
	* db2/btree/bt_search.c: Likewise.
	* db2/btree/bt_split.c: Likewise.
	* db2/btree/bt_stat.c: Likewise.
	* db2/btree/btree.src: Likewise.
	* db2/common/db_appinit.c: Likewise.
	* db2/common/db_err.c: Likewise.
	* db2/common/db_byteorder.c: Likewise.
	* db2/common/db_apprec.c: Likewise.
	* db2/common/db_salloc.c: Likewise.
	* db2/common/db_log2.c: Likewise.
	* db2/common/db_region.c: Likewise.
	* db2/common/db_shash.c: Likewise.
	* db2/db/db.c: Likewise.
	* db2/db/db.src: Likewise.
	* db2/db/db_conv.c: Likewise.
	* db2/db/db_dispatch.c: Likewise.
	* db2/db/db_dup.c: Likewise.
	* db2/db/db_overflow.c: Likewise.
	* db2/db/db_pr.c: Likewise.
	* db2/db/db_rec.c: Likewise.
	* db2/db/db_ret.c: Likewise.
	* db2/db/db_thread.c: Likewise.
	* db2/db/db_auto.c: Likewise.
	* db2/db185/db185.c: Likewise.
	* db2/db185/db185_int.h: Likewise.
	* db2/dbm/dbm.c: Likewise.
	* db2/hash/hash.c: Likewise.
	* db2/hash/hash.src: Likewise.
	* db2/hash/hash_page.c: Likewise.
	* db2/hash/hash_conv.c: Likewise.
	* db2/hash/hash_debug.c: Likewise.
	* db2/hash/hash_stat.c: Likewise.
	* db2/hash/hash_rec.c: Likewise.
	* db2/hash/hash_dup.c: Likewise.
	* db2/hash/hash_func.c: Likewise.
	* db2/hash/hash_auto.c: Likewise.
	* db2/include/mp.h: Likewise.
	* db2/include/btree.h: Likewise.
	* db2/include/db.h.src: Likewise.
	* db2/include/db_int.h.src: Likewise.
	* db2/include/db_shash.h: Likewise.
	* db2/include/db_swap.h: Likewise.
	* db2/include/db_185.h.src: Likewise.
	* db2/include/txn.h: Likewise.
	* db2/include/db_am.h: Likewise.
	* db2/include/shqueue.h: Likewise.
	* db2/include/hash.h: Likewise.
	* db2/include/db_dispatch.h: Likewise.
	* db2/include/lock.h: Likewise.
	* db2/include/db_page.h: Likewise.
	* db2/include/log.h: Likewise.
	* db2/include/db_auto.h: Likewise.
	* db2/include/btree_auto.h: Likewise.
	* db2/include/hash_auto.h: Likewise.
	* db2/include/log_auto.h: Likewise.
	* db2/include/txn_auto.h: Likewise.
	* db2/include/db_ext.h: Likewise.
	* db2/include/btree_ext.h: Likewise.
	* db2/include/clib_ext.h: Likewise.
	* db2/include/common_ext.h: Likewise.
	* db2/include/hash_ext.h: Likewise.
	* db2/include/lock_ext.h: Likewise.
	* db2/include/log_ext.h: Likewise.
	* db2/include/mp_ext.h: Likewise.
	* db2/include/mutex_ext.h: Likewise.
	* db2/include/os_ext.h: Likewise.
	* db2/include/txn_ext.h: Likewise.
	* db2/include/cxx_int.h: Likewise.
	* db2/include/db_cxx.h: Likewise.
	* db2/include/queue.h: Likewise.
	* db2/lock/lock.c: Likewise.
	* db2/lock/lock_conflict.c: Likewise.
	* db2/lock/lock_util.c: Likewise.
	* db2/lock/lock_deadlock.c: Likewise.
	* db2/log/log.c: Likewise.
	* db2/log/log_get.c: Likewise.
	* db2/log/log.src: Likewise.
	* db2/log/log_compare.c: Likewise.
	* db2/log/log_put.c: Likewise.
	* db2/log/log_rec.c: Likewise.
	* db2/log/log_archive.c: Likewise.
	* db2/log/log_register.c: Likewise.
	* db2/log/log_auto.c: Likewise.
	* db2/log/log_findckp.c: Likewise.
	* db2/mp/mp_bh.c: Likewise.
	* db2/mp/mp_fget.c: Likewise.
	* db2/mp/mp_fopen.c: Likewise.
	* db2/mp/mp_fput.c: Likewise.
	* db2/mp/mp_fset.c: Likewise.
	* db2/mp/mp_open.c: Likewise.
	* db2/mp/mp_region.c: Likewise.
	* db2/mp/mp_pr.c: Likewise.
	* db2/mp/mp_sync.c: Likewise.
	* db2/mutex/68020.gcc: Likewise.
	* db2/mutex/mutex.c: Likewise.
	* db2/mutex/README: Likewise.
	* db2/mutex/x86.gcc: Likewise.
	* db2/mutex/sparc.gcc: Likewise.
	* db2/mutex/uts4.cc.s: Likewise.
	* db2/mutex/alpha.dec: Likewise.
	* db2/mutex/alpha.gcc: Likewise.
	* db2/mutex/parisc.gcc: Likewise.
	* db2/mutex/parisc.hp: Likewise.
	* db2/os/db_os_abs.c: Likewise.
	* db2/os/db_os_dir.c: Likewise.
	* db2/os/db_os_fid.c: Likewise.
	* db2/os/db_os_lseek.c: Likewise.
	* db2/os/db_os_mmap.c: Likewise.
	* db2/os/db_os_open.c: Likewise.
	* db2/os/db_os_rw.c: Likewise.
	* db2/os/db_os_sleep.c: Likewise.
	* db2/os/db_os_stat.c: Likewise.
	* db2/os/db_os_unlink.c: Likewise.
	* db2/txn/txn.c: Likewise.
	* db2/txn/txn.src: Likewise.
	* db2/txn/txn_rec.c: Likewise.
	* db2/txn/txn_auto.c: Likewise.
	* db2/clib/getlong.c: Likewise.
	* db2/progs/db_archive/db_archive.c: Likewise.
	* db2/progs/db_checkpoint/db_checkpoint.c: Likewise.
	* db2/progs/db_deadlock/db_deadlock.c: Likewise.
	* db2/progs/db_dump/db_dump.c: Likewise.
	* db2/progs/db_dump185/db_dump185.c: Likewise.
	* db2/progs/db_load/db_load.c: Likewise.
	* db2/progs/db_printlog/db_printlog.c: Likewise.
	* db2/progs/db_recover/db_recover.c: Likewise.
	* db2/progs/db_stat/db_stat.c: Likewise.

	* libio/stdio.h [__cplusplus] (__STDIO_INLINE): Define as inline.

	* po/de.po, po/sv.po: Update from 2.0.5 translations.

	* sysdeps/unix/sysv/linux/netinet/tcp.h: Pretty print.

	* sunrpc/rpc/xdr.h (XDR): Don't define argument of x_destroy callback
	as const.
	* sunrpc/xdr_mem.c (xdrmem_destroy): Don't define argument as const.
	* sunrpx/xdr_rec.c (xdrrec_destroy): Likewise.
	* sunrpx/xdr_stdio.c (xdrstdio_destroy): Likewise.

1997-08-27 18:47  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/if_index.c: Include <errno.h>.
	Reported by Benjamin Kosnik <bkoz@cygnus.com>.

1997-08-27 02:27  Roland McGrath  <roland@baalperazim.frob.com>

	* abi-tags: New file.
	* csu/Makefile (distribute): Remove abi-tag.h.
	($(objpfx)abi-tag.h): New target.
	* Makefile (distribute): Add abi-tags.
	* sysdeps/unix/sysv/linux/abi-tag.h: File removed.
	* sysdeps/mach/hurd/abi-tag.h: File removed.
	* sysdeps/stub/abi-tag.h: File removed.

1997-08-25  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/make-syscalls.sh: Change output so that it
	generates compilation rules only for the currently selected object
	suffixes.

1997-08-25  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/m68k/dl-machine.h (RTLD_START): Switch back to previous
	section to avoid confusing the compiler.
	* sysdeps/alpha/dl-machine.h (RTLD_START): Likewise.
	* sysdeps/i386/dl-machine.h (RTLD_START): Likewise.
	* sysdeps/mips/dl-machine.h (RTLD_START): Likewise.
	* sysdeps/mips/mips64/dl-machine.h (RTLD_START): Likewise.
	* sysdeps/sparc/sparc32/dl-machine.h (RTLD_START): Likewise.

	* sysdeps/m68k/dl-machine.h (elf_machine_load_address): Use a GOT
	relocation instead of a constant to avoid text relocation.
	(ELF_MACHINE_BEFORE_RTLD_RELOC): Removed.
	(RTLD_START): Declare global labels as functions and add size
	directive.

1997-08-25 17:01  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/i386/bits/select.h: Correct assembler versions to work even
	for descriptors >= 32.

	* stdlib/alloca.h: Don't define alloca to __alloca since if gcc
	is used __alloca is not defined to __builtin_alloca and so might
	not be available.
	Reported by Uwe Ohse <uwe@ohse.de>.

	* sysdeps/unix/sysv/linux/sys/sysmacros.h: Define macros in a special
	way if gcc is not used and so dev_t is an array.
	Reported by Uwe Ohse <uwe@ohse.de>.

1997-08-23  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* manual/libc.texinfo: Reorder chapters to match logical order.

1997-08-25 12:22  Ulrich Drepper  <drepper@cygnus.com>

	* sunrpc/rpc/xdr.h: Change name of parameters in prototypes of
	xdr_reference, xdrmem_create, and xdrstdio_create because of clash
	with g++ internal symbols.
	Patch by Sudish Joseph <sj@eng.mindspring.net>.

	* elf/dl-deps.c: Implement handling of DT_FILTER.

1 files changed, 680 insertions, 0 deletions

diff --git a/db2/db/db_dup.c b/db2/db/db_dup.c
new file mode 100644
index 0000000000..8d364d518e
--- /dev/null
+++ b/db2/db/db_dup.c
@@ -0,0 +1,680 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1996, 1997
+ *	Sleepycat Software.  All rights reserved.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)db_dup.c	10.8 (Sleepycat) 7/20/97";
+#endif /* not lint */
+
+#ifndef NO_SYSTEM_INCLUDES
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#endif
+
+#include "db_int.h"
+#include "db_page.h"
+#include "db_swap.h"
+#include "btree.h"
+#include "db_am.h"
+#include "common_ext.h"
+
+static int __db_addpage __P((DB *,
+    PAGE **, db_indx_t *, int (*)(DB *, u_int32_t, PAGE **)));
+static int __db_dsplit __P((DB *,
+    PAGE **, db_indx_t *, u_int32_t, int (*)(DB *, u_int32_t, PAGE **)));
+
+/*
+ * __db_dput --
+ *	Put a duplicate item onto a duplicate page at the given index.
+ *
+ * PUBLIC: int __db_dput __P((DB *,
+ * PUBLIC:    DBT *, PAGE **, db_indx_t *, int (*)(DB *, u_int32_t, PAGE **)));
+ */
+int
+__db_dput(dbp, dbt, pp, indxp, newfunc)
+	DB *dbp;
+	DBT *dbt;
+	PAGE **pp;
+	db_indx_t *indxp;
+	int (*newfunc) __P((DB *, u_int32_t, PAGE **));
+{
+	BOVERFLOW bo;
+	DBT *data_dbtp, hdr_dbt, *hdr_dbtp;
+	PAGE *pagep;
+	db_indx_t size, isize;
+	db_pgno_t pgno;
+	int ret;
+
+	/*
+	 * We need some access method independent threshold for when we put
+	 * a duplicate item onto an overflow page.
+	 */
+	if (dbt->size > 0.25 * dbp->pgsize) {
+		if ((ret = __db_poff(dbp, dbt, &pgno, newfunc)) != 0)
+			return (ret);
+		bo.deleted = 0;
+		bo.type = B_OVERFLOW;
+		bo.tlen = dbt->size;
+		bo.pgno = pgno;
+		hdr_dbt.data = &bo;
+		hdr_dbt.size = isize = BOVERFLOW_SIZE;
+		hdr_dbtp = &hdr_dbt;
+		size = BOVERFLOW_PSIZE;
+		data_dbtp = NULL;
+	} else {
+		size = BKEYDATA_PSIZE(dbt->size);
+		isize = BKEYDATA_SIZE(dbt->size);
+		hdr_dbtp = NULL;
+		data_dbtp = dbt;
+	}
+
+	pagep = *pp;
+	if (size > P_FREESPACE(pagep)) {
+		if (*indxp == NUM_ENT(*pp) && NEXT_PGNO(*pp) == PGNO_INVALID)
+			ret = __db_addpage(dbp, pp, indxp, newfunc);
+		else
+			ret = __db_dsplit(dbp, pp, indxp, isize, newfunc);
+		if (ret != 0)
+			/* XXX: Pages not returned to free list. */
+			return (ret);
+		pagep = *pp;
+	}
+
+	/*
+	 * Now, pagep references the page on which to insert and indx is the
+	 * the location to insert.
+	 */
+	if ((ret = __db_pitem(dbp,
+	    pagep, (u_int32_t)*indxp, isize, hdr_dbtp, data_dbtp)) != 0)
+		return (ret);
+
+	(void)memp_fset(dbp->mpf, pagep, DB_MPOOL_DIRTY);
+	return (0);
+}
+
+/*
+ * __db_drem --
+ *	Remove a duplicate at the given index on the given page.
+ *
+ * PUBLIC: int __db_drem __P((DB *,
+ * PUBLIC:    PAGE **, u_int32_t, int (*)(DB *, PAGE *)));
+ */
+int
+__db_drem(dbp, pp, indx, freefunc)
+	DB *dbp;
+	PAGE **pp;
+	u_int32_t indx;
+	int (*freefunc) __P((DB *, PAGE *));
+{
+	PAGE *pagep;
+	int ret;
+
+	pagep = *pp;
+
+	/* Check if we are freeing a big item. */
+	if (GET_BKEYDATA(pagep, indx)->type == B_OVERFLOW) {
+		if ((ret = __db_doff(dbp,
+		    GET_BOVERFLOW(pagep, indx)->pgno, freefunc)) != 0)
+			return (ret);
+		ret = __db_ditem(dbp, pagep, indx, BOVERFLOW_SIZE);
+	} else
+		ret = __db_ditem(dbp, pagep, indx,
+		    BKEYDATA_SIZE(GET_BKEYDATA(pagep, indx)->len));
+	if (ret != 0)
+		return (ret);
+
+	if (NUM_ENT(pagep) == 0) {
+		/*
+		 * If the page is emptied, then the page is freed and the pp
+		 * parameter is set to reference the next, locked page in the
+		 * duplicate chain, if one exists.  If there was no such page,
+		 * then it is set to NULL.
+		 *
+		 * !!!
+		 * __db_relink will set the dirty bit for us.
+		 */
+		if ((ret = __db_relink(dbp, pagep, pp, 0)) != 0)
+			return (ret);
+		if ((ret = freefunc(dbp, pagep)) != 0)
+			return (ret);
+	} else
+		(void)memp_fset(dbp->mpf, pagep, DB_MPOOL_DIRTY);
+
+	return (0);
+}
+
+/*
+ * __db_dend --
+ *	Find the last page in a set of offpage duplicates.
+ *
+ * PUBLIC: int __db_dend __P((DB *, db_pgno_t, PAGE **));
+ */
+int
+__db_dend(dbp, pgno, pagep)
+	DB *dbp;
+	db_pgno_t pgno;
+	PAGE **pagep;
+{
+	PAGE *h;
+	int ret;
+
+	/*
+	 * This implements DB_KEYLAST.  The last page is returned in pp; pgno
+	 * should be the page number of the first page of the duplicate chain.
+	 */
+	for (;;) {
+		if ((ret = memp_fget(dbp->mpf, &pgno, 0, &h)) != 0) {
+			(void)__db_pgerr(dbp, pgno);
+			return (ret);
+		}
+		if ((pgno = NEXT_PGNO(h)) == PGNO_INVALID)
+			break;
+		(void)memp_fput(dbp->mpf, h, 0);
+	}
+
+	*pagep = h;
+	return (0);
+}
+
+/*
+ * __db_dsplit --
+ *	Split a page of duplicates, calculating the split point based
+ *	on an element of size "size" being added at "*indxp".
+ *	On entry hp contains a pointer to the page-pointer of the original
+ *	page.  On exit, it returns a pointer to the page containing "*indxp"
+ *	and "indxp" has been modified to reflect the index on the new page
+ *	where the element should be added.  The function returns with
+ *	the page on which the insert should happen, not yet put.
+ */
+static int
+__db_dsplit(dbp, hp, indxp, size, newfunc)
+	DB *dbp;
+	PAGE **hp;
+	db_indx_t *indxp;
+	u_int32_t size;
+	int (*newfunc) __P((DB *, u_int32_t, PAGE **));
+{
+	PAGE *h, *np, *tp;
+	BKEYDATA *bk;
+	DBT page_dbt;
+	db_indx_t indx, nindex, oindex, sum;
+	db_indx_t halfbytes, i, lastsum;
+	int did_indx, ret, s;
+
+	h = *hp;
+	indx = *indxp;
+
+	/* Create a temporary page to do compaction onto. */
+	if ((tp = (PAGE *)malloc(dbp->pgsize)) == NULL)
+		return (ENOMEM);
+#ifdef DEBUG
+	memset(tp, 0xff, dbp->pgsize);
+#endif
+	/* Create new page for the split. */
+	if ((ret = newfunc(dbp, P_DUPLICATE, &np)) != 0) {
+		FREE(tp, dbp->pgsize);
+		return (ret);
+	}
+
+	P_INIT(np, dbp->pgsize, PGNO(np), PGNO(h), NEXT_PGNO(h), 0,
+	    P_DUPLICATE);
+	P_INIT(tp, dbp->pgsize, PGNO(h), PREV_PGNO(h), PGNO(np), 0,
+	    P_DUPLICATE);
+
+	/* Figure out the split point */
+	halfbytes = (dbp->pgsize - HOFFSET(h)) / 2;
+	did_indx = 0;
+	for (sum = 0, lastsum = 0, i = 0; i < NUM_ENT(h); i++) {
+		if (i == indx) {
+			sum += size;
+			if (lastsum < halfbytes && sum >= halfbytes) {
+				/* We've crossed the halfway point. */
+				if ((db_indx_t)(halfbytes - lastsum) <
+				    (db_indx_t)(sum - halfbytes)) {
+					*hp = np;
+					*indxp = 0;
+					i--;
+				} else
+					*indxp = i;
+				break;
+			}
+			*indxp = i;
+			lastsum = sum;
+			did_indx = 1;
+		}
+		if (GET_BKEYDATA(h, i)->type == B_KEYDATA)
+			sum += BKEYDATA_SIZE(GET_BKEYDATA(h, i)->len);
+		else
+			sum += BOVERFLOW_SIZE;
+
+		if (lastsum < halfbytes && sum >= halfbytes) {
+			/* We've crossed the halfway point. */
+			if ((db_indx_t)(halfbytes - lastsum) <
+			    (db_indx_t)(sum - halfbytes))
+				i--;
+			break;
+		}
+	}
+
+	/*
+	 * Check if we have set the return values of the index pointer and
+	 * page pointer.
+	 */
+	if (!did_indx) {
+		*hp = np;
+		*indxp = indx - i - 1;
+	}
+
+	if (DB_LOGGING(dbp)) {
+		page_dbt.size = dbp->pgsize;
+		page_dbt.data = h;
+		if ((ret = __db_split_log(dbp->dbenv->lg_info,
+		    dbp->txn, &LSN(h), 0, DB_SPLITOLD, dbp->log_fileid,
+		    PGNO(h), &page_dbt, &LSN(h))) != 0) {
+			FREE(tp, dbp->pgsize);
+			return (ret);
+		}
+		LSN(tp) = LSN(h);
+	}
+
+	/*
+	 * If it's a btree, adjust the cursors.
+	 *
+	 * i is the index of the last element to stay on the page.
+	 */
+	if (dbp->type == DB_BTREE || dbp->type == DB_RECNO)
+		__bam_ca_split(dbp, PGNO(h), PGNO(h), PGNO(np), i + 1, 0);
+
+	for (nindex = 0, oindex = i + 1; oindex < NUM_ENT(h); oindex++) {
+		bk = GET_BKEYDATA(h, oindex);
+		if (bk->type == B_KEYDATA)
+			s = BKEYDATA_SIZE(bk->len);
+		else
+			s = BOVERFLOW_SIZE;
+
+		np->inp[nindex++] = HOFFSET(np) -= s;
+		memcpy((u_int8_t *)np + HOFFSET(np), bk, s);
+		NUM_ENT(np)++;
+	}
+
+	/*
+	 * Now do data compaction by copying the remaining stuff onto the
+	 * temporary page and then copying it back to the real page.
+	 */
+	for (nindex = 0, oindex = 0; oindex <= i; oindex++) {
+		bk = GET_BKEYDATA(h, oindex);
+		if (bk->type == B_KEYDATA)
+			s = BKEYDATA_SIZE(bk->len);
+		else
+			s = BOVERFLOW_SIZE;
+
+		tp->inp[nindex++] = HOFFSET(tp) -= s;
+		memcpy((u_int8_t *)tp + HOFFSET(tp), bk, s);
+		NUM_ENT(tp)++;
+	}
+
+	/*
+	 * This page (the temporary) should be only half full, so we do two
+	 * memcpy's, one for the top of the page and one for the bottom of
+	 * the page.  This way we avoid copying the middle which should be
+	 * about half a page.
+	 */
+	memcpy(h, tp, LOFFSET(tp));
+	memcpy((u_int8_t *)h + HOFFSET(tp),
+	    (u_int8_t *)tp + HOFFSET(tp), dbp->pgsize - HOFFSET(tp));
+	FREE(tp, dbp->pgsize);
+
+	if (DB_LOGGING(dbp)) {
+		page_dbt.size = dbp->pgsize;
+		page_dbt.data = h;
+		if ((ret = __db_split_log(dbp->dbenv->lg_info,
+		    dbp->txn, &LSN(h), 0, DB_SPLITNEW, dbp->log_fileid,
+		    PGNO(h), &page_dbt, &LSN(h))) != 0)
+			return (ret);
+
+		page_dbt.size = dbp->pgsize;
+		page_dbt.data = np;
+		if ((ret = __db_split_log(dbp->dbenv->lg_info,
+		    dbp->txn, &LSN(np), 0, DB_SPLITNEW, dbp->log_fileid,
+		    PGNO(np),  &page_dbt, &LSN(np))) != 0)
+			return (ret);
+	}
+
+	/*
+	 * Figure out if the location we're interested in is on the new
+	 * page, and if so, reset the callers' pointer.  Push the other
+	 * page back to the store.
+	 */
+	if (*hp == h)
+		ret = memp_fput(dbp->mpf, np, DB_MPOOL_DIRTY);
+	else
+		ret = memp_fput(dbp->mpf, h, DB_MPOOL_DIRTY);
+
+	return (ret);
+}
+
+/*
+ * __db_ditem --
+ *	Remove an item from a page.
+ *
+ * PUBLIC:  int __db_ditem __P((DB *, PAGE *, int, u_int32_t));
+ */
+int
+__db_ditem(dbp, pagep, indx, nbytes)
+	DB *dbp;
+	PAGE *pagep;
+	int indx;
+	u_int32_t nbytes;
+{
+	DBT ldbt;
+	db_indx_t cnt, offset;
+	int ret;
+	u_int8_t *from;
+
+	if (DB_LOGGING(dbp)) {
+		ldbt.data = P_ENTRY(pagep, indx);
+		ldbt.size = nbytes;
+		if ((ret = __db_addrem_log(dbp->dbenv->lg_info, dbp->txn,
+		    &LSN(pagep), 0, DB_REM_DUP, dbp->log_fileid, PGNO(pagep),
+		    (u_int32_t)indx, nbytes, &ldbt, NULL, &LSN(pagep))) != 0)
+			return (ret);
+	}
+
+	/*
+	 * If there's only a single item on the page, we don't have to
+	 * work hard.
+	 */
+	if (NUM_ENT(pagep) == 1) {
+		NUM_ENT(pagep) = 0;
+		HOFFSET(pagep) = dbp->pgsize;
+		return (0);
+	}
+
+	/*
+	 * Pack the remaining key/data items at the end of the page.  Use
+	 * memmove(3), the regions may overlap.
+	 */
+	from = (u_int8_t *)pagep + HOFFSET(pagep);
+	memmove(from + nbytes, from, pagep->inp[indx] - HOFFSET(pagep));
+	HOFFSET(pagep) += nbytes;
+
+	/* Adjust the indices' offsets. */
+	offset = pagep->inp[indx];
+	for (cnt = 0; cnt < NUM_ENT(pagep); ++cnt)
+		if (pagep->inp[cnt] < offset)
+			pagep->inp[cnt] += nbytes;
+
+	/* Shift the indices down. */
+	--NUM_ENT(pagep);
+	if (indx != NUM_ENT(pagep))
+		memmove(&pagep->inp[indx], &pagep->inp[indx + 1],
+		    sizeof(db_indx_t) * (NUM_ENT(pagep) - indx));
+
+	/* If it's a btree, adjust the cursors. */
+	if (dbp->type == DB_BTREE || dbp->type == DB_RECNO)
+		__bam_ca_di(dbp, PGNO(pagep), indx, -1);
+
+	return (0);
+}
+
+/*
+ * __db_pitem --
+ *	Put an item on a page.
+ *
+ * PUBLIC: int __db_pitem
+ * PUBLIC:     __P((DB *, PAGE *, u_int32_t, u_int32_t, DBT *, DBT *));
+ */
+int
+__db_pitem(dbp, pagep, indx, nbytes, hdr, data)
+	DB *dbp;
+	PAGE *pagep;
+	u_int32_t indx;
+	u_int32_t nbytes;
+	DBT *hdr, *data;
+{
+	BKEYDATA bk;
+	DBT thdr;
+	int ret;
+	u_int8_t *p;
+
+	/*
+	 * Put a single item onto a page.  The logic figuring out where to
+	 * insert and whether it fits is handled in the caller.  All we do
+	 * here is manage the page shuffling.  We cheat a little bit in that
+	 * we don't want to copy the dbt on a normal put twice.  If hdr is
+	 * NULL, we create a BKEYDATA structure on the page, otherwise, just
+	 * copy the caller's information onto the page.
+	 *
+	 * This routine is also used to put entries onto the page where the
+	 * entry is pre-built, e.g., during recovery.  In this case, the hdr
+	 * will point to the entry, and the data argument will be NULL.
+	 *
+	 * !!!
+	 * There's a tremendous potential for off-by-one errors here, since
+	 * the passed in header sizes must be adjusted for the structure's
+	 * placeholder for the trailing variable-length data field.
+	 */
+	if (DB_LOGGING(dbp))
+		if ((ret = __db_addrem_log(dbp->dbenv->lg_info, dbp->txn,
+		    &LSN(pagep), 0, DB_ADD_DUP, dbp->log_fileid, PGNO(pagep),
+		    (u_int32_t)indx, nbytes, hdr, data, &LSN(pagep))) != 0)
+			return (ret);
+
+	if (hdr == NULL) {
+		bk.deleted = 0;
+		bk.type = B_KEYDATA;
+		bk.len = data == NULL ? 0 : data->size;
+
+		thdr.data = &bk;
+		thdr.size = SSZA(BKEYDATA, data);
+		hdr = &thdr;
+	}
+
+	/* Adjust the index table, then put the item on the page. */
+	if (indx != NUM_ENT(pagep))
+		memmove(&pagep->inp[indx + 1], &pagep->inp[indx],
+		    sizeof(db_indx_t) * (NUM_ENT(pagep) - indx));
+	HOFFSET(pagep) -= nbytes;
+	pagep->inp[indx] = HOFFSET(pagep);
+	++NUM_ENT(pagep);
+
+	p = P_ENTRY(pagep, indx);
+	memcpy(p, hdr->data, hdr->size);
+	if (data != NULL)
+		memcpy(p + hdr->size, data->data, data->size);
+
+	/* If it's a btree, adjust the cursors. */
+	if (dbp->type == DB_BTREE || dbp->type == DB_RECNO)
+		__bam_ca_di(dbp, PGNO(pagep), indx, 1);
+
+	return (0);
+}
+
+/*
+ * __db_relink --
+ *	Relink around a deleted page.
+ *
+ * PUBLIC: int __db_relink __P((DB *, PAGE *, PAGE **, int));
+ */
+int
+__db_relink(dbp, pagep, new_next, needlock)
+	DB *dbp;
+	PAGE *pagep, **new_next;
+	int needlock;
+{
+	PAGE *np, *pp;
+	DB_LOCK npl, ppl;
+	DB_LSN *nlsnp, *plsnp;
+	int ret;
+
+	ret = 0;
+	np = pp = NULL;
+	npl = ppl = LOCK_INVALID;
+	nlsnp = plsnp = NULL;
+
+	/* Retrieve and lock the two pages. */
+	if (pagep->next_pgno != PGNO_INVALID) {
+		if (needlock && (ret = __bam_lget(dbp,
+		    0, pagep->next_pgno, DB_LOCK_WRITE, &npl)) != 0)
+			goto err;
+		if ((ret = memp_fget(dbp->mpf,
+		    &pagep->next_pgno, 0, &np)) != 0) {
+			(void)__db_pgerr(dbp, pagep->next_pgno);
+			goto err;
+		}
+		nlsnp = &np->lsn;
+	}
+	if (pagep->prev_pgno != PGNO_INVALID) {
+		if (needlock && (ret = __bam_lget(dbp,
+		    0, pagep->prev_pgno, DB_LOCK_WRITE, &ppl)) != 0)
+			goto err;
+		if ((ret = memp_fget(dbp->mpf,
+		    &pagep->prev_pgno, 0, &pp)) != 0) {
+			(void)__db_pgerr(dbp, pagep->next_pgno);
+			goto err;
+		}
+		plsnp = &pp->lsn;
+	}
+
+	/* Log the change. */
+	if (DB_LOGGING(dbp)) {
+		if ((ret = __db_relink_log(dbp->dbenv->lg_info, dbp->txn,
+		    &pagep->lsn, 0, dbp->log_fileid, pagep->pgno, &pagep->lsn,
+		    pagep->prev_pgno, plsnp, pagep->next_pgno, nlsnp)) != 0)
+			goto err;
+		if (np != NULL)
+			np->lsn = pagep->lsn;
+		if (pp != NULL)
+			pp->lsn = pagep->lsn;
+	}
+
+	/*
+	 * Modify and release the two pages.
+	 *
+	 * !!!
+	 * The parameter new_next gets set to the page following the page we
+	 * are removing.  If there is no following page, then new_next gets
+	 * set to NULL.
+	 */
+	if (np != NULL) {
+		np->prev_pgno = pagep->prev_pgno;
+		if (new_next == NULL)
+			ret = memp_fput(dbp->mpf, np, DB_MPOOL_DIRTY);
+		else {
+			*new_next = np;
+			ret = memp_fset(dbp->mpf, np, DB_MPOOL_DIRTY);
+		}
+		if (ret != 0)
+			goto err;
+		if (needlock)
+			(void)__bam_lput(dbp, npl);
+	} else if (new_next != NULL)
+		*new_next = NULL;
+
+	if (pp != NULL) {
+		pp->next_pgno = pagep->next_pgno;
+		if ((ret = memp_fput(dbp->mpf, pp, DB_MPOOL_DIRTY)) != 0)
+			goto err;
+		if (needlock)
+			(void)__bam_lput(dbp, ppl);
+	}
+	return (0);
+
+err:	if (np != NULL)
+		(void)memp_fput(dbp->mpf, np, 0);
+	if (needlock && npl != LOCK_INVALID)
+		(void)__bam_lput(dbp, npl);
+	if (pp != NULL)
+		(void)memp_fput(dbp->mpf, pp, 0);
+	if (needlock && ppl != LOCK_INVALID)
+		(void)__bam_lput(dbp, ppl);
+	return (ret);
+}
+
+/*
+ * __db_ddup --
+ *	Delete an offpage chain of duplicates.
+ *
+ * PUBLIC: int __db_ddup __P((DB *, db_pgno_t, int (*)(DB *, PAGE *)));
+ */
+int
+__db_ddup(dbp, pgno, freefunc)
+	DB *dbp;
+	db_pgno_t pgno;
+	int (*freefunc) __P((DB *, PAGE *));
+{
+	PAGE *pagep;
+	DBT tmp_dbt;
+	int ret;
+
+	do {
+		if ((ret = memp_fget(dbp->mpf, &pgno, 0, &pagep)) != 0) {
+			(void)__db_pgerr(dbp, pgno);
+			return (ret);
+		}
+
+		if (DB_LOGGING(dbp)) {
+			tmp_dbt.data = pagep;
+			tmp_dbt.size = dbp->pgsize;
+			if ((ret = __db_split_log(dbp->dbenv->lg_info, dbp->txn,
+			    &LSN(pagep), 0, DB_SPLITOLD, dbp->log_fileid,
+			    PGNO(pagep), &tmp_dbt, &LSN(pagep))) != 0)
+				return (ret);
+		}
+		pgno = pagep->next_pgno;
+		if ((ret = freefunc(dbp, pagep)) != 0)
+			return (ret);
+	} while (pgno != PGNO_INVALID);
+
+	return (0);
+}
+
+/*
+ * __db_addpage --
+ *	Create a new page and link it onto the next_pgno field of the
+ *	current page.
+ */
+static int
+__db_addpage(dbp, hp, indxp, newfunc)
+	DB *dbp;
+	PAGE **hp;
+	db_indx_t *indxp;
+	int (*newfunc) __P((DB *, u_int32_t, PAGE **));
+{
+	PAGE *newpage;
+	int ret;
+
+	if ((ret = newfunc(dbp, P_DUPLICATE, &newpage)) != 0)
+		return (ret);
+
+	if (DB_LOGGING(dbp)) {
+		if ((ret = __db_addpage_log(dbp->dbenv->lg_info,
+		    dbp->txn, &LSN(*hp), 0, dbp->log_fileid,
+		    PGNO(*hp), &LSN(*hp), PGNO(newpage), &LSN(newpage))) != 0) {
+			return (ret);
+		}
+		LSN(newpage) = LSN(*hp);
+	}
+
+	PREV_PGNO(newpage) = PGNO(*hp);
+	NEXT_PGNO(*hp) = PGNO(newpage);
+
+	if ((ret = memp_fput(dbp->mpf, *hp, DB_MPOOL_DIRTY)) != 0)
+		return (ret);
+	*hp = newpage;
+	*indxp = 0;
+	return (0);
+}