[PATCH v2 06/11] Add a more general version of lookup_struct_elt_type.

[John Baldwin]

On 2/8/19 4:40 PM, John Baldwin wrote:
> lookup_struct_elt is a new function which returns a tuple of
> information about a component of a structure or union.  The returned
> tuple contains a pointer to the struct field object for the component
> as well as a bit offset of that field within the structure.  If the
> field names a field in an anonymous substructure, the offset is the
> "global" offset relative to the original structure type.  If noerr is
> set, then the returned tuple will set the field pointer to NULL to
> indicate a missing component rather than throwing an error.
> 
> lookup_struct_elt_type is now reimplemented in terms of this new
> function.  It simply returns the type of the returned field.

Hopefully this is close enough to lk_find_field that you can reuse it.
One difference is that it defines its own dedicated type and the second is
that it returns the raw bitpos so that it is hopefully easier to reuse in
other places.  I think you can probably call it and just pass the members
the returned structure (with an added divide for the offset to convert to
bytes) to construct an lk_symbol.

-- 
John Baldwin

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