From d62d3d0d24d30964bc713e31574d0ff749e279ed Mon Sep 17 00:00:00 2001
From: drh <drh@noemail.net>
Date: Fri, 24 Jan 2003 12:14:20 +0000
Subject: [PATCH] Add asserts to btree.c that check for the correct size of
 various typedefs and structures.  Ticket #233. (CVS 845)

FossilOrigin-Name: c7e647d011b086a6e57420850f6bc4f28fcb23ee
---
 manifest      | 12 ++++++------
 manifest.uuid |  2 +-
 src/btree.c   | 18 +++++++++++++++++-
 3 files changed, 24 insertions(+), 8 deletions(-)

diff --git a/manifest b/manifest
index c01d4989ca..6e7c3aa864 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Minor\srefinements\sto\sthe\spager.\s(CVS\s844)
-D 2003-01-22T01:26:44
+C Add\sasserts\sto\sbtree.c\sthat\scheck\sfor\sthe\scorrect\ssize\sof\svarious\stypedefs\nand\sstructures.\s\sTicket\s#233.\s(CVS\s845)
+D 2003-01-24T12:14:20
 F Makefile.in 6606854b1512f185b8e8c779b8d7fc2750463d64
 F Makefile.linux-gcc b86a99c493a5bfb402d1d9178dcdc4bd4b32f906
 F README f1de682fbbd94899d50aca13d387d1b3fd3be2dd
@@ -19,7 +19,7 @@ F publish.sh ce0bf7e235984bc156dc5d1a0c8092db4c8442f3
 F spec.template 238f7db425a78dc1bb7682e56e3834c7270a3f5e
 F sqlite.1 83f4a9d37bdf2b7ef079a82d54eaf2e3509ee6ea
 F src/auth.c 9c2db0bc7707f2d2e227f47e3d557b41d44ade75
-F src/btree.c 131b5903f66e148f0f9af0cedd1c6654932c4e04
+F src/btree.c eb4f430b062500d7533c031097d3ff8824eca3ba
 F src/btree.h 17710339f7a8f46e3c7d6d0d4648ef19c584ffda
 F src/build.c 0454fd02e163865c82106dd52dec4a4caf908ebf
 F src/delete.c cbd499f3f9297504c42e328af89bef1a2113d04c
@@ -154,7 +154,7 @@ F www/speed.tcl 52759968401d81760fc01f9d3ab6242f6d2a7066
 F www/sqlite.tcl ae3dcfb077e53833b59d4fcc94d8a12c50a44098
 F www/tclsqlite.tcl 1db15abeb446aad0caf0b95b8b9579720e4ea331
 F www/vdbe.tcl 2013852c27a02a091d39a766bc87cff329f21218
-P 61869bb51b981a47d783cc8739833cc0c4733b0a
-R c183df5a3160c5a0bd4aa1d31253edd6
+P 19221dee5fee4c8800cbae309f009964c8d646a2
+R 5f54a128edf3ccd559b45b128151fef3
 U drh
-Z fa8ef383d1b8461b08c239cde8f9cd63
+Z a3694ca5aa529fbe36a1167d1cb0514e
diff --git a/manifest.uuid b/manifest.uuid
index b430c6e74d..c51d816a09 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-19221dee5fee4c8800cbae309f009964c8d646a2
\ No newline at end of file
+c7e647d011b086a6e57420850f6bc4f28fcb23ee
\ No newline at end of file
diff --git a/src/btree.c b/src/btree.c
index 564d9ad878..db0ba02469 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -9,7 +9,7 @@
 **    May you share freely, never taking more than you give.
 **
 *************************************************************************
-** $Id: btree.c,v 1.80 2003/01/05 21:41:41 drh Exp $
+** $Id: btree.c,v 1.81 2003/01/24 12:14:20 drh Exp $
 **
 ** This file implements a external (disk-based) database using BTrees.
 ** For a detailed discussion of BTrees, refer to
@@ -675,6 +675,22 @@ int sqliteBtreeOpen(
   Btree *pBt;
   int rc;
 
+  /*
+  ** The following asserts make sure that structures used by the btree are
+  ** the right size.  This is to guard against size changes that result
+  ** when compiling on a different architecture.
+  */
+  assert( sizeof(u32)==4 );
+  assert( sizeof(u16)==2 );
+  assert( sizeof(Pgno)==4 );
+  assert( sizeof(PageHdr)==8 );
+  assert( sizeof(CellHdr)==12 );
+  assert( sizeof(FreeBlk)==4 );
+  assert( sizeof(OverflowPage)==SQLITE_PAGE_SIZE );
+  assert( sizeof(FreelistInfo)==OVERFLOW_SIZE );
+  assert( sizeof(ptr)==sizeof(char*) );
+  assert( sizeof(uptr)==sizeof(ptr) );
+
   pBt = sqliteMalloc( sizeof(*pBt) );
   if( pBt==0 ){
     *ppBtree = 0;