Update.cvs/libc-ud-971111

1997-11-11 21:30  Ulrich Drepper  <drepper@cygnus.com>

	* include/sys/stat.h: Define stat, fstat, lstat and *64 variants
	as macros so the the library compiles correctly even without
	optimization.
	* io/fstat.c: Undef fstat.
	* io/fstat64.c: Undef fstat64
	* io/lstat.c: Undef lstat.
	* io/lstat64.c: Undef lstat64
	* io/stat.c: Undef stat.
	* io/stat64.c: Undef stat64
	* io/fts.c: Include <include/sys/stat.h> to get macro definitions.
	* io/ftw.c: Likewise.
	* io/getdirname.c: Likewise.

	* Makefile (install): Run test-installation.pl if possible.

	* db2/Makefile: Update from db-2.3.12.
	* db2/db.h: Likewise.
	* db2/db_int.h: Likewise.
	* db2/btree/bt_cursor.c: Likewise.
	* db2/btree/bt_delete.c: Likewise.
	* db2/btree/bt_open.c: Likewise.
	* db2/btree/bt_put.c: Likewise.
	* db2/btree/bt_rec.c: Likewise.
	* db2/btree/bt_recno.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/btree/btree_auto.c: Likewise.
	* db2/btree/bt_cursor.c: Likewise.
	* db2/btree/bt_delete.c: Likewise.
	* db2/btree/bt_open.c: Likewise.
	* db2/btree/bt_put.c: Likewise.
	* db2/btree/bt_rec.c: Likewise.
	* db2/btree/bt_recno.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/btree/btree_auto.c: Likewise.
	* db2/common/db_appinit.c: Likewise.
	* db2/common/db_apprec.c: Likewise.
	* db2/common/db_byteorder.c: Likewise.
	* db2/common/db_region.c: Likewise.
	* db2/db/db.c: Likewise
	* db2/db/db.src: Likewise
	* db2/db/db_auto.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/db185/db185.c: Likewise.
	* db2/hash/hash.c: Likewise.
	* db2/hash/hash.src: Likewise.
	* db2/hash/hash_auto.c: Likewise.
	* db2/hash/hash_dup.c: Likewise.
	* db2/hash/hash_page.c: Likewise.
	* db2/hash/hash_rec.c: Likewise.
	* db2/include/btree_auto.h: Likewise.
	* db2/include/btree_ext.h: Likewise.
	* db2/include/clib_ext.h: Likewise.
	* db2/include/common_ext.h: Likewise.
	* db2/include/db.h.src: Likewise.
	* db2/include/db_am.h: Likewise.
	* db2/include/db_auto.h: Likewise.
	* db2/include/db_cxx.h: Likewise.
	* db2/include/db_ext.h: Likewise.
	* db2/include/db_int.h.src: Likewise.
	* db2/include/hash.h: Likewise.
	* db2/include/hash_auto.h: Likewise.
	* db2/include/hash_ext.h: Likewise.
	* db2/include/lock.h: Likewise.
	* db2/include/lock_ext.h: Likewise.
	* db2/include/log.h: Likewise.
	* db2/include/log_ext.h: Likewise.
	* db2/include/mp.h: Likewise.
	* db2/include/mp_ext.h: Likewise.
	* db2/include/mutex_ext.h: Likewise.
	* db2/include/os_ext.h: Likewise.
	* db2/include/os_func.h: Likewise.
	* db2/include/txn.h: Likewise.
	* db2/include/txn_ext.h: Likewise.
	* db2/lock/lock.c: Likewise.
	* db2/lock/lock_deadlock.c: Likewise.
	* db2/log/log.c: Likewise.
	* db2/log/log_archive.c: Likewise.
	* db2/log/log_auto.c: Likewise.
	* db2/log/log_findckp.c: Likewise.
	* db2/log/log_get.c: Likewise.
	* db2/log/log_put.c: Likewise.
	* db2/log/log_rec.c: Likewise.
	* db2/log/log_register.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_pr.c: Likewise.
	* db2/mp/mp_region.c: Likewise.
	* db2/mp/mp_sync.c: Likewise.
	* db2/mutex/mutex.c: Likewise.
	* db2/os/os_abs.c: Likewise.
	* db2/os/os_dir.c: Likewise.
	* db2/os/os_fid.c: Likewise.
	* db2/os/os_fsync.c: Likewise.
	* db2/os/os_func.c: Likewise.
	* db2/os/os_map.c: Likewise.
	* db2/os/os_oflags.c: Likewise.
	* db2/os/os_open.c: Likewise.
	* db2/os/os_rpath.c: Likewise.
	* db2/os/os_rw.c: Likewise.
	* db2/os/os_seek.c: Likewise.
	* db2/os/os_sleep.c: Likewise.
	* db2/os/os_stat.c: Likewise.
	* db2/os/os_unlink.c: Likewise.
	* db2/progs/db_deadlock/db_deadlock.c: Likewise.
	* db2/progs/db_dump/db_dump.c: Likewise.
	* db2/progs/db_load/db_load.c: Likewise.
	* db2/progs/db_recover/db_recover.c: Likewise.
	* db2/progs/db_stat/db_stat.c: Likewise.
	* db2/txn/txn.c: Likewise.
	* db2/txn/txn_auto.c: Likewise.
	* db2/txn/txn_rec.c: Likewise.
	* db2/os/db_os_abs.c: Removed.
	* db2/os/db_os_dir.c: Removed.
	* db2/os/db_os_fid.c: Removed.
	* db2/os/db_os_lseek.c: Removed.
	* db2/os/db_os_mmap.c: Removed.
	* db2/os/db_os_open.c: Removed.
	* db2/os/db_os_rw.c: Removed.
	* db2/os/db_os_sleep.c: Removed.
	* db2/os/db_os_stat.c: Removed.
	* db2/os/db_os_unlink.c: Removed.

	* libio/stdio.h (fopen): Add __restrict to parameters.

	* manual/process.texi (system): Describe behaviour for NULL argument.

	* stdio-common/printf-parse.h: Parse hh modifier.
	* stdio-common/vfprintf.c: Handle hh modifier.
	* stdio-common/vfscanf.c: Likewise.
	* manual/stdio.texi: Describe hh modifier for scanf/printf.

	* math/complex.h: Don't define _Imaginary_I, but instead _Complex_I.
	gcc does no yet know the `imaginary' keyword.

	* math/test-math.c: Add little test for know gcc bug.

	* math/tgmath.h: Make complex versions of log10() only available
	if __USE_GNU.

	* stdlib/test-canon.c: Fix typo.

	* sysdeps/generic/setenv.c: Avoid compilation warnings.
	Reported by Jim Meyering.

	* sysdeps/generic/bits/errno.h: EILSEQ is an ISO C error number.
	* sysdeps/mach/hurd/bits/errno.h: Likewise.
	* sysdeps/standalone/bits/errno.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/errno.h: Likewise.

	* sysdeps/i386/i586/memcpy.S: New file.
	* sysdeps/i386/i586/mempcpy.S: New file.

	* sysdeps/i386/i586/memset.S: Fix typo.

	* sysdeps/posix/getcwd.c: Define HAVE_MEMPCPY for _LIBC.  Add casts.

	* sysdeps/posix/system.c: Add comment to explain code.

	* sysdeps/wordsize-32/inttypes.h: Include <stddef.h> for wchar_t.
	Define PTRDIFF_{MIN,MAX}, SIG_ATOMIC_{MIN,MAX}, SIZE_MAX,
	WCHAR_{MIN,MAX}, WINT_{MIN,MAX}.
	Define wcstoimax, wcstoumax.
	* sysdeps/wordsize-64/inttypes.h: Likewise.

	* wcsmbs/wchar.h: Define WCHAR_{MIN,MAX} if not already defined.
	Declare __wcsto{l,ul,ll,ull}_internal only if not already done.

	* time/Makefile (routines): Add strfxtime.
	* time/strftime.c: Implement %F and %f format.
	* time/strfxtime.c: New file.
	* time/time.h: Define new types and symbols from ISO C 9X.

	* time/mktime.c: Little comment correction.

1997-11-10  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/libm-ieee754/s_sincosl.c: Fix typo.

	* sysdeps/libm-ieee754/s_tanl.c: Fix typo.

	* sysdeps/libm-ieee754/s_floorl.c: Correct typos.

	* sysdeps/libm-ieee754/e_remainderl.c: Replace
	EXTRACT_LDOUBLE_WORDS by GET_LDOUBLE_WORDS.

	* sysdeps/libm-ieee754/e_atan2l.c: Replace EXTRACT_LDOUBLE_WORDS
	by GET_LDOUBLE_WORDS.

	* sysdeps/libm-ieee754/s_scalbnl.c: Replace ";" by "," for correct
	variable declaration.
	* sysdeps/libm-ieee754/s_scalblnl.c: Likewise.

	* sysdeps/libm-ieee754/s_lrint.c (__lrint): Correct function.

	* math/libm-test.c (sqrt_test): Add test for sqrt (0.25).
	(asin_test): Add more test.

1997-11-10 23:34  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/libm-ieee754/e_asin.c: Add braces to make code clearer
	and to not confuse the poor compiler.
	* sysdeps/libm-ieee754/e_asinf.c: Likewise.
	Reported by vertex@cagent.com.

1997-11-09  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* elf/dl-lookup.c (do_lookup): Don't accept the base version if we
	require a specific one.

	* libio/oldfreopen.c: Bind old symbols to version GLIBC_2.0.
	* libio/oldiofopen.c: Likewise.
	* libio/oldstdfiles.c: Likewise.
	* libc.map: Export them.

1997-11-10 07:40  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* stdlib/exit.c (exit): Handle recursive calls to exit ().

1997-11-09  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/m68k/fpu/s_llrint.c: Fixed to take double argument
	instead of long double.
	* sysdeps/m68k/fpu/s_llrintf.c: New file.
	* sysdeps/m68k/fpu/s_llrintl.c: New file.

	* sysdeps/libm-ieee754/s_llrint.c: Make compilable and fix
	overflow condition.
	* sysdeps/libm-ieee754/s_llrintf.c: Fix overflow condition.
	* sysdeps/libm-ieee754/s_llrintl.c: Likewise.
	* sysdeps/libm-ieee754/s_llround.c: Likewise.
	* sysdeps/libm-ieee754/s_llroundf.c: Likewise.
	* sysdeps/libm-ieee754/s_llroundl.c: Likewise.
	* sysdeps/libm-ieee754/s_lrint.c: Likewise.
	* sysdeps/libm-ieee754/s_lrintf.c: Likewise.
	* sysdeps/libm-ieee754/s_lrintl.c: Likewise.
	* sysdeps/libm-ieee754/s_lround.c: Likewise.
	* sysdeps/libm-ieee754/s_lroundf.c: Likewise.
	* sysdeps/libm-ieee754/s_lroundl.c: Likewise.

	* math/libm-test.c: Test all three variants of lrint and llrint.
	Fix typos in lround and llround tests.  Add tests for boundary
	cases for lrint and llround.

1997-11-08  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* manual/arith.texi: Misc doc fixes.
	* manual/ctype.texi: Likewise.
	* manual/pattern.texi: Likewise.
	* manual/terminal.texi: Likewise.

1997-11-08  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/xstatconv.c: Use struct assignment
	instead of memcpy to let the compiler use whatever it regards as
	optimal.
	* sysdeps/unix/sysv/linux/alpha/xstatconv.c: Likewise.

1997-11-08  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/Makefile (sysdep_headers)
	[$(subdir)=misc]: Add sys/prctl.h.
	* sysdeps/unix/sysv/linux/Dist: Distribute it.

1997-11-08  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* io/ftwtest-sh: Don't use the unknown which command, instead try
	pwd as /bin/pwd and /usr/bin/pwd.

1997-11-08  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* manual/maint.texi (Tools for Installation): Don't recommend
	broken version 3.76.1 of make.
	(Porting): Fix wording.

1997-11-06 06:13  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* config.make.in (build-pic-default): New, defined with
	pic_default.

	* configure.in (pic_default): New, set to yes if PIC is
	default.

	* Makeconfig (CPPFLAGS-.o, CPPFLAGS-.op, CPPFLAGS-.og,
	CPPFLAGS-.ob): Add -DPIC if $(build-pic-default) is yes.

1997-11-09 18:15  Ulrich Drepper  <drepper@cygnus.com>

	* Makerules (libc.so): Fix typo.

	* csu/Makefile (CFLAGS-initfini.s): Correctly fix moving function
	definition.  Patch by Zack Weinberg <zack@rabi.phys.columbia.edu>.

	* stdlib/strtod.c: Handle numbers like 0.0e10000 correctly which
	produce ±0.0.  Reported by Joe Keane <jgk@jgk.org>.

	* sysdeps/libm-ieee754/s_ceill.c: Fix typos.
	* sysdeps/libm-ieee754/s_llrint.c: Correct code, it never worked.

1997-11-06 07:00  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* sysdeps/unix/sysv/i386/i686/time.S: Removed.

1997-11-08 14:07  Thorsten Kukuk  <kukuk@vt.uni-paderborn.de>

	* nis/libnsl.map: Add __do_niscall2 for nis_cachemgr.

	* nis/nis_call.c: Set UDP resend timeout correct.

	* nis/nss_compat/compat-grp.c: Rewritten to make it faster.
	* nis/nss_compat/compat-pwd.c: Likewise.
	* nis/nss_compat/compat-spwd.c: Likewise.
	* nis/ypclnt.c: Fix UDP resend timeout, fix yp_bind/do_ypcall
	interaction.

	* inet/protocols/routed.h: Include sys/socket.h.
	* inet/protocols/talkd.h: Likewise.
	* inet/protocols/timed.h: Include rpc/types.h.
	* sunrpc/rpc/pmap_clnt.h: Include rpc/clnt.h.

1997-11-06 01:39  Ulrich Drepper  <drepper@cygnus.com>

	* Makerules (libc.so): Add missing closing brace.

1997-11-05  Brendan Kehoe  <brendan@lisa.cygnus.com>

	* libio.h (__P): Name its arg `p' instead of `params'.
	This was added solely to work around problems with
	the definition of __P in the Solaris math.h header.

1 files changed, 296 insertions, 165 deletions

diff --git a/db2/btree/bt_put.c b/db2/btree/bt_put.c
index af09f76d41..b3d775bb0f 100644
--- a/db2/btree/bt_put.c
+++ b/db2/btree/bt_put.c
@@ -47,7 +47,7 @@
 #include "config.h"
 
 #ifndef lint
-static const char sccsid[] = "@(#)bt_put.c	10.25 (Sleepycat) 9/17/97";
+static const char sccsid[] = "@(#)bt_put.c	10.31 (Sleepycat) 10/26/97";
 #endif /* not lint */
 
 #ifndef NO_SYSTEM_INCLUDES
@@ -66,7 +66,10 @@ static const char sccsid[] = "@(#)bt_put.c	10.25 (Sleepycat) 9/17/97";
 static int __bam_fixed __P((BTREE *, DBT *));
 static int __bam_lookup __P((DB *, DBT *, int *));
 static int __bam_ndup __P((DB *, PAGE *, u_int32_t));
-static int __bam_partial __P((DB *, DBT *, PAGE *, u_int32_t));
+static int __bam_ovput __P((DB *, PAGE *, u_int32_t, DBT *));
+static int __bam_partial __P((DB *, DBT *, PAGE *, u_int32_t, u_int32_t));
+static u_int32_t
+	   __bam_partsize __P((DB *, DBT *, PAGE *, u_int32_t));
 
 /*
  * __bam_put --
@@ -334,21 +337,6 @@ slow:	return (__bam_search(dbp, key, S_INSERT, 1, NULL, exactp));
 }
 
 /*
- * OVPUT --
- *	Copy an overflow item onto a page.
- */
-#undef	OVPUT
-#define	OVPUT(h, indx, bo) do {						\
-	DBT __hdr;							\
-	memset(&__hdr, 0, sizeof(__hdr));				\
-	__hdr.data = &bo;						\
-	__hdr.size = BOVERFLOW_SIZE;					\
-	if ((ret = __db_pitem(dbp,					\
-	    h, indx, BOVERFLOW_SIZE, &__hdr, NULL)) != 0)		\
-		return (ret);						\
-} while (0)
-
-/*
  * __bam_iitem --
  *	Insert an item into the tree.
  *
@@ -365,19 +353,18 @@ __bam_iitem(dbp, hp, indxp, key, data, op, flags)
 {
 	BTREE *t;
 	BKEYDATA *bk;
-	BOVERFLOW kbo, dbo;
 	DBT tdbt;
 	PAGE *h;
 	db_indx_t indx;
-	u_int32_t have_bytes, need_bytes, needed;
-	int bigkey, bigdata, dcopy, dupadjust, ret;
+	u_int32_t data_size, have_bytes, need_bytes, needed;
+	int bigkey, bigdata, dupadjust, replace, ret;
 
 	t = dbp->internal;
 	h = *hp;
 	indx = *indxp;
 
-	dupadjust = 0;
 	bk = NULL;			/* XXX: Shut the compiler up. */
+	dupadjust = replace = 0;
 
 	/*
 	 * If it's a page of duplicates, call the common code to do the work.
@@ -385,7 +372,7 @@ __bam_iitem(dbp, hp, indxp, key, data, op, flags)
 	 * !!!
 	 * Here's where the hp and indxp are important.  The duplicate code
 	 * may decide to rework/rearrange the pages and indices we're using,
-	 * so the caller must understand that the stack has to change.
+	 * so the caller must understand that the page stack may change.
 	 */
 	if (TYPE(h) == P_DUPLICATE) {
 		/* Adjust the index for the new item if it's a DB_AFTER op. */
@@ -401,24 +388,7 @@ __bam_iitem(dbp, hp, indxp, key, data, op, flags)
 		return (__db_dput(dbp, data, hp, indxp, __bam_new));
 	}
 
-	/*
-	 * XXX
-	 * Handle partial puts.
-	 *
-	 * This is truly awful from a performance standput.  We don't optimize
-	 * for partial puts at all, we delete the record and add it back in,
-	 * regardless of size or if we're simply overwriting current data.
-	 * The hash access method does this a lot better than we do, and we're
-	 * eventually going to have to fix it.
-	 */
-	if (F_ISSET(data, DB_DBT_PARTIAL)) {
-		tdbt = *data;
-		if ((ret = __bam_partial(dbp, &tdbt, h, indx)) != 0)
-			return (ret);
-		data = &tdbt;
-	}
-
-	/* If it's a short fixed-length record, fix it up. */
+	/* Handle fixed-length records: build the real record. */
 	if (F_ISSET(dbp, DB_RE_FIXEDLEN) && data->size != t->bt_recno->re_len) {
 		tdbt = *data;
 		if ((ret = __bam_fixed(t, &tdbt)) != 0)
@@ -427,30 +397,15 @@ __bam_iitem(dbp, hp, indxp, key, data, op, flags)
 	}
 
 	/*
-	 * If the key or data item won't fit on a page, store it in the
-	 * overflow pages.
-	 *
-	 * !!!
-	 * From this point on, we have to recover the allocated overflow
-	 * pages on error.
+	 * Figure out how much space the data will take, including if it's a
+	 * partial record.  If either of the key or data items won't fit on
+	 * a page, we'll have to store them on overflow pages.
 	 */
-	bigkey = bigdata = 0;
-	if (LF_ISSET(BI_NEWKEY) && key->size > t->bt_ovflsize) {
-		B_TSET(kbo.type, B_OVERFLOW, 0);
-		kbo.tlen = key->size;
-		if ((ret = __db_poff(dbp, key, &kbo.pgno, __bam_new)) != 0)
-			goto err;
-		bigkey = 1;
-	}
-	if (data->size > t->bt_ovflsize) {
-		B_TSET(dbo.type, B_OVERFLOW, 0);
-		dbo.tlen = data->size;
-		if ((ret = __db_poff(dbp, data, &dbo.pgno, __bam_new)) != 0)
-			goto err;
-		bigdata = 1;
-	}
+	bigkey = LF_ISSET(BI_NEWKEY) && key->size > t->bt_ovflsize;
+	data_size = F_ISSET(data, DB_DBT_PARTIAL) ?
+	    __bam_partsize(dbp, data, h, indx) : data->size;
+	bigdata = data_size > t->bt_ovflsize;
 
-	dcopy = 0;
 	needed = 0;
 	if (LF_ISSET(BI_NEWKEY)) {
 		/* If BI_NEWKEY is set we're adding a new key and data pair. */
@@ -461,7 +416,7 @@ __bam_iitem(dbp, hp, indxp, key, data, op, flags)
 		if (bigdata)
 			needed += BOVERFLOW_PSIZE;
 		else
-			needed += BKEYDATA_PSIZE(data->size);
+			needed += BKEYDATA_PSIZE(data_size);
 	} else {
 		/*
 		 * We're either overwriting the data item of a key/data pair
@@ -482,16 +437,8 @@ __bam_iitem(dbp, hp, indxp, key, data, op, flags)
 		if (bigdata)
 			need_bytes += BOVERFLOW_PSIZE;
 		else
-			need_bytes += BKEYDATA_PSIZE(data->size);
+			need_bytes += BKEYDATA_PSIZE(data_size);
 
-		/*
-		 * If we're overwriting a data item, we copy it if it's not a
-		 * special record type and it's the same size (including any
-		 * alignment) and do a delete/insert otherwise.
-		 */
-		if (op == DB_CURRENT && !bigdata &&
-		    B_TYPE(bk->type) == B_KEYDATA && have_bytes == need_bytes)
-			dcopy = 1;
 		if (have_bytes < need_bytes)
 			needed += need_bytes - have_bytes;
 	}
@@ -505,9 +452,15 @@ __bam_iitem(dbp, hp, indxp, key, data, op, flags)
 	 * check in the btree split code, so we don't undo it there!?!?
 	 */
 	if (P_FREESPACE(h) < needed ||
-	    (t->bt_maxkey != 0 && NUM_ENT(h) > t->bt_maxkey)) {
-		ret = DB_NEEDSPLIT;
-		goto err;
+	    (t->bt_maxkey != 0 && NUM_ENT(h) > t->bt_maxkey))
+		return (DB_NEEDSPLIT);
+
+	/* Handle partial puts: build the real record. */
+	if (F_ISSET(data, DB_DBT_PARTIAL)) {
+		tdbt = *data;
+		if ((ret = __bam_partial(dbp, &tdbt, h, indx, data_size)) != 0)
+			return (ret);
+		data = &tdbt;
 	}
 
 	/*
@@ -515,10 +468,10 @@ __bam_iitem(dbp, hp, indxp, key, data, op, flags)
 	 *
 	 * 1. Append a new key/data pair.
 	 * 2. Insert a new key/data pair.
-	 * 3. Copy the data item.
-	 * 4. Delete/insert the data item.
-	 * 5. Append a new data item.
-	 * 6. Insert a new data item.
+	 * 3. Append a new data item (a new duplicate).
+	 * 4. Insert a new data item (a new duplicate).
+	 * 5. Overflow item: delete and re-add the data item.
+	 * 6. Replace the data item.
 	 */
 	if (LF_ISSET(BI_NEWKEY)) {
 		switch (op) {
@@ -533,42 +486,17 @@ __bam_iitem(dbp, hp, indxp, key, data, op, flags)
 		}
 
 		/* Add the key. */
-		if (bigkey)
-			OVPUT(h, indx, kbo);
-		else {
-			DBT __data;
-			memset(&__data, 0, sizeof(__data));
-			__data.data = key->data;
-			__data.size = key->size;
+		if (bigkey) {
+			if ((ret = __bam_ovput(dbp, h, indx, key)) != 0)
+				return (ret);
+		} else
 			if ((ret = __db_pitem(dbp, h, indx,
-			    BKEYDATA_SIZE(key->size), NULL, &__data)) != 0)
-				goto err;
-		}
+			    BKEYDATA_SIZE(key->size), NULL, key)) != 0)
+				return (ret);
 		++indx;
 	} else {
 		switch (op) {
-		case DB_CURRENT:	/* 3. Copy the data item. */
-			/*
-			 * If we're not logging and it's possible, overwrite
-			 * the current item.
-			 *
-			 * XXX
-			 * We should add a separate logging message so that
-			 * we can do this anytime it's possible, including
-			 * for partial record puts.
-			 */
-			if (dcopy && !DB_LOGGING(dbp)) {
-				bk->len = data->size;
-				memcpy(bk->data, data->data, data->size);
-				goto done;
-			}
-					/* 4. Delete/insert the data item. */
-			if (TYPE(h) == P_LBTREE)
-				++indx;
-			if ((ret = __bam_ditem(dbp, h, indx)) != 0)
-				goto err;
-			break;
-		case DB_AFTER:		/* 5. Append a new data item. */
+		case DB_AFTER:		/* 3. Append a new data item. */
 			if (TYPE(h) == P_LBTREE) {
 				/*
 				 * Adjust the cursor and copy in the key for
@@ -576,7 +504,7 @@ __bam_iitem(dbp, hp, indxp, key, data, op, flags)
 				 */
 				if ((ret = __bam_adjindx(dbp,
 				    h, indx + P_INDX, indx, 1)) != 0)
-					goto err;
+					return (ret);
 
 				indx += 3;
 				dupadjust = 1;
@@ -589,7 +517,7 @@ __bam_iitem(dbp, hp, indxp, key, data, op, flags)
 				*indxp += 1;
 			}
 			break;
-		case DB_BEFORE:		/* 6. Insert a new data item. */
+		case DB_BEFORE:		/* 4. Insert a new data item. */
 			if (TYPE(h) == P_LBTREE) {
 				/*
 				 * Adjust the cursor and copy in the key for
@@ -597,43 +525,62 @@ __bam_iitem(dbp, hp, indxp, key, data, op, flags)
 				 */
 				if ((ret =
 				    __bam_adjindx(dbp, h, indx, indx, 1)) != 0)
-					goto err;
+					return (ret);
 
 				++indx;
 				dupadjust = 1;
 			} else
 				__bam_ca_di(dbp, h->pgno, indx, 1);
 			break;
+		case DB_CURRENT:
+			if (TYPE(h) == P_LBTREE)
+				++indx;
+
+			/*
+			 * 5. Delete/re-add the data item.
+			 *
+			 * If we're dealing with offpage items, we have to 
+			 * delete and then re-add the item.
+			 */
+			if (bigdata || B_TYPE(bk->type) == B_OVERFLOW) {
+				if ((ret = __bam_ditem(dbp, h, indx)) != 0)
+					return (ret);
+				break;
+			}
+
+			/* 6. Replace the data item. */
+			replace = 1;
+			break;
 		default:
 			abort();
 		}
 	}
 
 	/* Add the data. */
-	if (bigdata)
-		OVPUT(h, indx, dbo);
-	else {
+	if (bigdata) {
+		if ((ret = __bam_ovput(dbp, h, indx, data)) != 0)
+			return (ret);
+	} else {
 		BKEYDATA __bk;
-		DBT __hdr, __data;
-		memset(&__data, 0, sizeof(__data));
-		__data.data = data->data;
-		__data.size = data->size;
+		DBT __hdr;
 
 		if (LF_ISSET(BI_DELETED)) {
 			B_TSET(__bk.type, B_KEYDATA, 1);
-			__bk.len = __data.size;
+			__bk.len = data->size;
 			__hdr.data = &__bk;
 			__hdr.size = SSZA(BKEYDATA, data);
 			ret = __db_pitem(dbp, h, indx,
-			    BKEYDATA_SIZE(__data.size), &__hdr, &__data);
-		} else
+			    BKEYDATA_SIZE(data->size), &__hdr, data);
+		} else if (replace)
+			ret = __bam_ritem(dbp, h, indx, data);
+		else
 			ret = __db_pitem(dbp, h, indx,
-			    BKEYDATA_SIZE(data->size), NULL, &__data);
+			    BKEYDATA_SIZE(data->size), NULL, data);
 		if (ret != 0)
-			goto err;
+			return (ret);
 	}
 
-done:	++t->lstat.bt_added;
+	++t->lstat.bt_added;
 
 	ret = memp_fset(dbp->mpf, h, DB_MPOOL_DIRTY);
 
@@ -645,22 +592,206 @@ done:	++t->lstat.bt_added;
 	if (dupadjust && P_FREESPACE(h) <= dbp->pgsize / 2) {
 		--indx;
 		if ((ret = __bam_ndup(dbp, h, indx)) != 0)
-			goto err;
+			return (ret);
 	}
 
 	if (t->bt_recno != NULL)
 		F_SET(t->bt_recno, RECNO_MODIFIED);
 
-	if (0) {
-err:		if (bigkey)
-			(void)__db_doff(dbp, kbo.pgno, __bam_free);
-		if (bigdata)
-			(void)__db_doff(dbp, dbo.pgno, __bam_free);
-	}
 	return (ret);
 }
 
 /*
+ * __bam_partsize --
+ *	Figure out how much space a partial data item is in total.
+ */
+static u_int32_t
+__bam_partsize(dbp, data, h, indx)
+	DB *dbp;
+	DBT *data;
+	PAGE *h;
+	u_int32_t indx;
+{
+	BKEYDATA *bk;
+	u_int32_t nbytes;
+
+	/*
+	 * Figure out how much total space we'll need.  If the record doesn't
+	 * already exist, it's simply the data we're provided.
+	 */
+	if (indx >= NUM_ENT(h))
+		return (data->doff + data->size);
+
+	/*
+	 * Otherwise, it's the data provided plus any already existing data
+	 * that we're not replacing.
+	 */
+	bk = GET_BKEYDATA(h, indx + (TYPE(h) == P_LBTREE ? O_INDX : 0));
+	nbytes =
+	    B_TYPE(bk->type) == B_OVERFLOW ? ((BOVERFLOW *)bk)->tlen : bk->len;
+
+	/*
+	 * There are really two cases here:
+	 *
+	 * Case 1: We are replacing some bytes that do not exist (i.e., they
+	 * are past the end of the record).  In this case the number of bytes
+	 * we are replacing is irrelevant and all we care about is how many
+	 * bytes we are going to add from offset.  So, the new record length
+	 * is going to be the size of the new bytes (size) plus wherever those
+	 * new bytes begin (doff).
+	 *
+	 * Case 2: All the bytes we are replacing exist.  Therefore, the new
+	 * size is the oldsize (nbytes) minus the bytes we are replacing (dlen)
+	 * plus the bytes we are adding (size).
+	 */
+	if (nbytes < data->doff + data->dlen)		/* Case 1 */
+		return (data->doff + data->size);
+
+	return (nbytes + data->size - data->dlen);	/* Case 2 */
+}
+
+/*
+ * OVPUT --
+ *	Copy an overflow item onto a page.
+ */
+#undef	OVPUT
+#define	OVPUT(h, indx, bo) do {						\
+	DBT __hdr;							\
+	memset(&__hdr, 0, sizeof(__hdr));				\
+	__hdr.data = &bo;						\
+	__hdr.size = BOVERFLOW_SIZE;					\
+	if ((ret = __db_pitem(dbp,					\
+	    h, indx, BOVERFLOW_SIZE, &__hdr, NULL)) != 0)		\
+		return (ret);						\
+} while (0)
+
+/*
+ * __bam_ovput --
+ *	Build an overflow item and put it on the page.
+ */
+static int
+__bam_ovput(dbp, h, indx, item)
+	DB *dbp;
+	PAGE *h;
+	u_int32_t indx;
+	DBT *item;
+{
+	BOVERFLOW bo;
+	int ret;
+
+	B_TSET(bo.type, B_OVERFLOW, 0);
+	bo.tlen = item->size;
+	if ((ret = __db_poff(dbp, item, &bo.pgno, __bam_new)) != 0)
+		return (ret);
+
+	OVPUT(h, indx, bo);
+
+	return (0);
+}
+
+/*
+ * __bam_ritem --
+ *	Replace an item on a page.
+ *
+ * PUBLIC: int __bam_ritem __P((DB *, PAGE *, u_int32_t, DBT *));
+ */
+int
+__bam_ritem(dbp, h, indx, data)
+	DB *dbp;
+	PAGE *h;
+	u_int32_t indx;
+	DBT *data;
+{
+	BKEYDATA *bk;
+	DBT orig, repl;
+	db_indx_t lo, ln, min, off, prefix, suffix;
+	int32_t nbytes;
+	int cnt, ret;
+	u_int8_t *p, *t;
+
+	/*
+	 * Replace 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.
+	 */
+	bk = GET_BKEYDATA(h, indx);
+
+	/* Log the change. */
+	if (DB_LOGGING(dbp)) {
+		/*
+		 * We might as well check to see if the two data items share
+		 * a common prefix and suffix -- it can save us a lot of log
+		 * message if they're large.
+		 */
+		min = data->size < bk->len ? data->size : bk->len;
+		for (prefix = 0,
+		    p = bk->data, t = data->data;
+		    prefix < min && *p == *t; ++prefix, ++p, ++t)
+			;
+
+		min -= prefix;
+		for (suffix = 0,
+		    p = (u_int8_t *)bk->data + bk->len - 1,
+		    t = (u_int8_t *)data->data + data->size - 1;
+		    suffix < min && *p == *t; ++suffix, --p, --t)
+			;
+
+		/* We only log the parts of the keys that have changed. */
+		orig.data = (u_int8_t *)bk->data + prefix;
+		orig.size = bk->len - (prefix + suffix);
+		repl.data = (u_int8_t *)data->data + prefix;
+		repl.size = data->size - (prefix + suffix);
+		if ((ret = __bam_repl_log(dbp->dbenv->lg_info, dbp->txn,
+		    &LSN(h), 0, dbp->log_fileid, PGNO(h), &LSN(h),
+		    (u_int32_t)indx, (u_int32_t)B_DISSET(bk->type),
+		    &orig, &repl, (u_int32_t)prefix, (u_int32_t)suffix)) != 0)
+			return (ret);
+	}
+
+	/*
+	 * Set references to the first in-use byte on the page and the
+	 * first byte of the item being replaced.
+	 */
+	p = (u_int8_t *)h + HOFFSET(h);
+	t = (u_int8_t *)bk;
+
+	/*
+	 * If the entry is growing in size, shift the beginning of the data
+	 * part of the page down.  If the entry is shrinking in size, shift
+	 * the beginning of the data part of the page up.  Use memmove(3),
+	 * the regions overlap.
+	 */
+	lo = BKEYDATA_SIZE(bk->len);
+	ln = BKEYDATA_SIZE(data->size);
+	if (lo != ln) {
+		nbytes = lo - ln;		/* Signed difference. */
+		if (p == t)			/* First index is fast. */
+			h->inp[indx] += nbytes;
+		else {				/* Else, shift the page. */
+			memmove(p + nbytes, p, t - p);
+
+			/* Adjust the indices' offsets. */
+			off = h->inp[indx];
+			for (cnt = 0; cnt < NUM_ENT(h); ++cnt)
+				if (h->inp[cnt] <= off)
+					h->inp[cnt] += nbytes;
+		}
+
+		/* Clean up the page and adjust the item's reference. */
+		HOFFSET(h) += nbytes;
+		t += nbytes;
+	}
+
+	/* Copy the new item onto the page. */
+	bk = (BKEYDATA *)t;
+	B_TSET(bk->type, B_KEYDATA, 0);
+	bk->len = data->size;
+	memcpy(bk->data, data->data, data->size);
+
+	return (0);
+}
+
+/*
  * __bam_ndup --
  *	Check to see if the duplicate set at indx should have its own page.
  *	If it should, create it.
@@ -766,16 +897,21 @@ __bam_fixed(t, dbt)
 	rp = t->bt_recno;
 
 	/*
-	 * If using fixed-length records, and the record is long, return
-	 * EINVAL.  If it's short, pad it out.  Use the record data return
-	 * memory, it's only short-term.
+	 * If database contains fixed-length records, and the record is long,
+	 * return EINVAL.
 	 */
 	if (dbt->size > rp->re_len)
 		return (EINVAL);
+
+	/*
+	 * The caller checked to see if it was just right, so we know it's
+	 * short.  Pad it out.  We use the record data return memory, it's
+	 * only a short-term use.
+	 */
 	if (t->bt_rdata.ulen < rp->re_len) {
 		t->bt_rdata.data = t->bt_rdata.data == NULL ?
-		    (void *)malloc(rp->re_len) :
-		    (void *)realloc(t->bt_rdata.data, rp->re_len);
+		    (void *)__db_malloc(rp->re_len) :
+		    (void *)__db_realloc(t->bt_rdata.data, rp->re_len);
 		if (t->bt_rdata.data == NULL) {
 			t->bt_rdata.ulen = 0;
 			return (ENOMEM);
@@ -786,12 +922,16 @@ __bam_fixed(t, dbt)
 	memset((u_int8_t *)t->bt_rdata.data + dbt->size,
 	    rp->re_pad, rp->re_len - dbt->size);
 
-	/* Set the DBT to reference our new record. */
+	/*
+	 * Clean up our flags and other information just in case, and
+	 * change the caller's DBT to reference our created record.
+	 */
 	t->bt_rdata.size = rp->re_len;
 	t->bt_rdata.dlen = 0;
 	t->bt_rdata.doff = 0;
 	t->bt_rdata.flags = 0;
 	*dbt = t->bt_rdata;
+
 	return (0);
 }
 
@@ -800,47 +940,28 @@ __bam_fixed(t, dbt)
  *	Build the real record for a partial put.
  */
 static int
-__bam_partial(dbp, dbt, h, indx)
+__bam_partial(dbp, dbt, h, indx, nbytes)
 	DB *dbp;
 	DBT *dbt;
 	PAGE *h;
-	u_int32_t indx;
+	u_int32_t indx, nbytes;
 {
 	BTREE *t;
 	BKEYDATA *bk, tbk;
 	BOVERFLOW *bo;
 	DBT copy;
-	u_int32_t len, nbytes, tlen;
+	u_int32_t len, tlen;
 	int ret;
 	u_int8_t *p;
 
 	bo = NULL;			/* XXX: Shut the compiler up. */
 	t = dbp->internal;
 
-	/*
-	 * Figure out how much total space we'll need.  Worst case is where
-	 * the record is 0 bytes long, in which case doff causes the record
-	 * to extend, and the put data is appended to it.
-	 */
-	if (indx < NUM_ENT(h)) {
-		bk = GET_BKEYDATA(h, indx + (TYPE(h) == P_LBTREE ? O_INDX : 0));
-		if (B_TYPE(bk->type) == B_OVERFLOW) {
-			bo = (BOVERFLOW *)bk;
-			nbytes = bo->tlen;
-		} else
-			nbytes = bk->len;
-	} else {
-		bk = &tbk;
-		B_TSET(bk->type, B_KEYDATA, 0);
-		nbytes = bk->len = 0;
-	}
-	nbytes += dbt->doff + dbt->size + dbt->dlen;
-
-	/* Allocate the space. */
+	/* We use the record data return memory, it's only a short-term use. */
 	if (t->bt_rdata.ulen < nbytes) {
 		t->bt_rdata.data = t->bt_rdata.data == NULL ?
-		    (void *)malloc(nbytes) :
-		    (void *)realloc(t->bt_rdata.data, nbytes);
+		    (void *)__db_malloc(nbytes) :
+		    (void *)__db_realloc(t->bt_rdata.data, nbytes);
 		if (t->bt_rdata.data == NULL) {
 			t->bt_rdata.ulen = 0;
 			return (ENOMEM);
@@ -848,6 +969,16 @@ __bam_partial(dbp, dbt, h, indx)
 		t->bt_rdata.ulen = nbytes;
 	}
 
+	/* Find the current record. */
+	if (indx < NUM_ENT(h)) {
+		bk = GET_BKEYDATA(h, indx + (TYPE(h) == P_LBTREE ? O_INDX : 0));
+		bo = (BOVERFLOW *)bk;
+	} else {
+		bk = &tbk;
+		B_TSET(bk->type, B_KEYDATA, 0);
+		bk->len = 0;
+	}
+
 	/* We use nul bytes for extending the record, get it over with. */
 	memset(t->bt_rdata.data, 0, nbytes);