diff -ur ooo_SRC680_m138_src.orig/tools/inc/stream.hxx ooo_SRC680_m138_src/tools/inc/stream.hxx
--- ooo_SRC680_m138_src.orig/tools/inc/stream.hxx	2005-11-05 19:04:30.000000000 +0100
+++ ooo_SRC680_m138_src/tools/inc/stream.hxx	2005-11-06 00:01:35.000000000 +0100
@@ -92,6 +94,31 @@ inline rtl_TextEncoding GetStoreCharSet(
 		return eEncoding;
 }
 
+// ------------------
+// - 64-bit helpers -
+// ------------------
+
+// The only reason these inlines exist is to make conversion
+// to full 64-bit stream APIs easier later on.  If all places
+// that make direct use of the stream APIs use these inlines
+// to convert back to 32-bit numbers, we should
+// just be able to grep the code for places that depend on
+// 32-bit interaction with SvStream.
+
+inline sal_uInt32 svstream_Size_to_u32( sal_Size n )
+{
+// This doesn't compile on Windows...
+//	OSL_ENSURE((sal_uInt32)n <= ::std::numeric_limits< sal_uInt32 >::max(),
+//		"svstream_Size_to_u32(): WARNING! truncation will during cast from 64-bit to 32-bit.");
+	return (sal_uInt32) n;
+}
+
+inline sal_Size svstream_u32_to_Size( sal_uInt32 n )
+{
+	return (sal_Size) n;
+}
+
+
 // ---------------
 // - StreamTypes -
 // ---------------