Operations on Structure Handles

The macros for performing operations on structures are as follows:

size_t STRUCT_SIZE(handle)

Returns the size of the structure referred to by handle, according to its embedded data model.

typeof fieldname STRUCT_FGET(handle, fieldname)

Returns the indicated field in the data structure referred to by handle. This field is a non-pointer type.

typeof fieldname STRUCT_FGETP(handle, fieldname)

Returns the indicated field in the data structure referred to by handle. This field is a pointer type.

STRUCT_FSET(handle, fieldname, val)

Sets the indicated field in the data structure referred to by handle to value val. The type of val should match the type of fieldname. The field is a non-pointer type.

STRUCT_FSETP(handle, fieldname, val)

Sets the indicated field in the data structure referred to by handle to value val. The field is a pointer type.

typeof fieldname *STRUCT_FADDR(handle, fieldname)

Returns the address of the indicated field in the data structure referred to by handle.

struct structname *STRUCT_BUF(handle)

Returns a pointer to the native structure described by handle.