From: Petr Beneš <w1benny@gmail.com>

* `sizeof_field` returns the size of a specific struct member
* `endof_field` returns the offset to the end of the member within the struct

It will be useful in upcoming layout checks of SMBIOS structs.

Signed-off-by: Petr Beneš <w1benny@gmail.com>
---
 tools/include/xen-tools/common-macros.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/include/xen-tools/common-macros.h b/tools/include/xen-tools/common-macros.h
index 0088208c2e..9838a108aa 100644
--- a/tools/include/xen-tools/common-macros.h
+++ b/tools/include/xen-tools/common-macros.h
@@ -83,6 +83,11 @@
 #define __packed __attribute__((__packed__))
 #endif
 
+#define sizeof_field(type, member) sizeof(((type *)NULL)->member)
+
+#define endof_field(type, member) \
+    (offsetof(type, member) + sizeof_field(type, member))
+
 #define container_of(ptr, type, member) ({              \
     typeof(((type *)0)->member) *mptr__ = (ptr);        \
     (type *)((char *)mptr__ - offsetof(type, member));  \
-- 
2.34.1

On Sat, Aug 23, 2025 at 10:26:49PM +0000, Petr Beneš wrote:
> From: Petr Beneš <w1benny@gmail.com>
> 
> * `sizeof_field` returns the size of a specific struct member
> * `endof_field` returns the offset to the end of the member within the struct
> 
> It will be useful in upcoming layout checks of SMBIOS structs.
> 
> Signed-off-by: Petr Beneš <w1benny@gmail.com>

Acked-by: Anthony PERARD <anthony.perard@vates.tech>

-- 
Anthony PERARD