From 2ce71b4e7a11d23d9267f4c3e2714adde454ddcd Mon Sep 17 00:00:00 2001
From: drh <drh@noemail.net>
Date: Mon, 6 Jun 2011 13:38:11 +0000
Subject: [PATCH] Add assert() statements to verify that u16 pointers
 associated with the enhancement in [897f56a158] are always 2-byte aligned.

FossilOrigin-Name: 98ccfa930e8e5f10808a518e3e22e85e8a8a65c2
---
 manifest      | 12 ++++++------
 manifest.uuid |  2 +-
 src/btree.c   |  2 ++
 3 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/manifest b/manifest
index acedbbc719..9f7ebae4ea 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Performance\simprovement\sto\sthe\sbtree\ssearch\sroutine.
-D 2011-06-04T01:43:53.858
+C Add\sassert()\sstatements\sto\sverify\sthat\su16\spointers\sassociated\swith\nthe\senhancement\sin\s[897f56a158]\sare\salways\s2-byte\saligned.
+D 2011-06-06T13:38:11.704
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 11dcc00a8d0e5202def00e81732784fb0cc4fe1d
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -122,7 +122,7 @@ F src/auth.c 523da7fb4979469955d822ff9298352d6b31de34
 F src/backup.c 986c15232757f2873dff35ee3b35cbf935fc573c
 F src/bitvec.c af50f1c8c0ff54d6bdb7a80e2fceca5a93670bef
 F src/btmutex.c 976f45a12e37293e32cae0281b15a21d48a8aaa7
-F src/btree.c c19d7b35c8325b302d88d73e834642a7a96ee003
+F src/btree.c 8c46f0ab69ad9549c75a3a91fed87abdaa743e2f
 F src/btree.h f5d775cd6cfc7ac32a2535b70e8d2af48ef5f2ce
 F src/btreeInt.h 67978c014fa4f7cc874032dd3aacadd8db656bc3
 F src/build.c 5a428625d21ad409514afb40ad083bee25dd957a
@@ -942,7 +942,7 @@ F tool/split-sqlite3c.tcl d9be87f1c340285a3e081eb19b4a247981ed290c
 F tool/symbols.sh bc2a3709940d47c8ac8e0a1fdf17ec801f015a00
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
 F tool/warnings.sh 347d974d143cf132f953b565fbc03026f19fcb4d
-P 897f56a158ebe62758c9998e4941ae046c75fb99
-R 84139bde7a129a9544042a4a85d415c4
+P 65db822f200bafe9abe59b33b17b2c643c17c5e8
+R 6f20bbc84376df4d202ff7744a749f24
 U drh
-Z 4316427fea8d5aeb84c01ffb6d821ecd
+Z b952c48c970134cec62f175ed76931db
diff --git a/manifest.uuid b/manifest.uuid
index e0e3846b64..4a6c7d51ec 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-65db822f200bafe9abe59b33b17b2c643c17c5e8
\ No newline at end of file
+98ccfa930e8e5f10808a518e3e22e85e8a8a65c2
\ No newline at end of file
diff --git a/src/btree.c b/src/btree.c
index 640d48b452..3d7162dbb3 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -5421,6 +5421,7 @@ static void dropCell(MemPage *pPage, int idx, int sz, int *pRC){
     return;
   }
   endPtr = &data[pPage->cellOffset + 2*pPage->nCell - 2];
+  assert( (SQLITE_PTR_TO_INT(ptr)&1)==0 );  /* ptr is always 2-byte aligned */
   while( ptr<endPtr ){
     *(u16*)ptr = *(u16*)&ptr[2];
     ptr += 2;
@@ -5516,6 +5517,7 @@ static void insertCell(
     }
     ptr = &data[end];
     endPtr = &data[ins];
+    assert( (SQLITE_PTR_TO_INT(ptr)&1)==0 );  /* ptr is always 2-byte aligned */
     while( ptr>endPtr ){
       *(u16*)ptr = *(u16*)&ptr[-2];
       ptr -= 2;