payload: Rework pointer to directly target another payload field

PayloadEntry pointer will no longer pre-compute it's offset to target on
construction, but instead save a reference to the target field and
dynamically compute the pointer value on demand.

This has the restriction that pointer targets must now reside in the
same Payload object, at the same encapsulation level.  However, pointers
will now dynamically react to their target's relocation due to padding
change or other field alterations.

When a pointer is generated, we now simply encode the address of the
target field as it currently stands at the time.  A new property "math"
may be given a lambda function, which will have the chance to massage
this final pointer value before use.

Signed-off-by: Malfurious <m@lfurio.us>

0 files changed, 0 insertions, 0 deletions