From 88da18cccfb7e76b35e075b0c9419c6b164c6a43 Mon Sep 17 00:00:00 2001 From: Hallvard Furuseth Date: Sat, 10 Sep 2011 10:11:55 +0200 Subject: [PATCH] Put MDB_node. in host byte order. --- libraries/libmdb/mdb.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/libraries/libmdb/mdb.c b/libraries/libmdb/mdb.c index db5a11b..fb0df16 100644 --- a/libraries/libmdb/mdb.c +++ b/libraries/libmdb/mdb.c @@ -533,10 +533,13 @@ typedef struct MDB_page { typedef struct MDB_node { /** lo and hi are used for data size on leaf nodes and for * child pgno on branch nodes. On 64 bit platforms, flags - * is also used for pgno. (branch nodes ignore flags) + * is also used for pgno. (Branch nodes have no flags). + * They are in in host byte order in case that lets some + * accesses be optimized into a 32-bit word access. */ - unsigned short mn_lo; - unsigned short mn_hi; /**< part of dsize or pgno */ +#define mn_lo mn_offset[__BYTE_ORDER!=__LITTLE_ENDIAN] +#define mn_hi mn_offset[__BYTE_ORDER==__LITTLE_ENDIAN] /**< part of dsize or pgno */ + unsigned short mn_offset[2]; unsigned short mn_flags; /**< flags for special node types */ #define F_BIGDATA 0x01 /**< data put on overflow page */ #define F_SUBDATA 0x02 /**< data is a sub-database */