Created a preprocessing unit presult_t and a function to process them

Essentially a presult_t contains one of these:

1) A label construction, which stores the label symbol into
`label` (PRES_LABEL)

2) An instruction that calls upon a label, storing the instruction
in `instruction` and the label name in `label` (PRES_LABEL_ADDRESS)

3) An instruction that uses a relative address offset, storing the
instruction in `instruction` and the offset wanted into
`relative_address` (PRES_RELATIVE_ADDRESS)

4) An instruction that requires no further processing, storing the
instruction into `instruction` (PRES_COMPLETE_INSTRUCTION)

In the processing stage, we resolve all calls by iterating one by one
and maintaining an absolute instruction address.  Pretty nice, lots
more machinery involved in parsing now.

0 files changed, 0 insertions, 0 deletions