ref: 1978a37e19d4cce2c97dac1b90fc099eeede5d8d
dir: /macros/event_macros.asm/
;\1 = event index ;\2 = return result in carry instead of zero flag CheckEvent: MACRO event_byte = ((\1) / 8) ld a, [wEventFlags + event_byte] IF _NARG > 1 IF ((\1) % 8) == 7 add a ELSE REPT ((\1) % 8) + 1 rrca ENDR ENDC ELSE bit (\1) % 8, a ENDC ENDM ;\1 = event index CheckEventReuseA: MACRO IF event_byte != ((\1) / 8) event_byte = ((\1) / 8) ld a, [wEventFlags + event_byte] ENDC bit (\1) % 8, a ENDM ;\1 = event index ;\2 = event index of the last event used before the branch CheckEventAfterBranchReuseA: MACRO event_byte = ((\2) / 8) IF event_byte != ((\1) / 8) event_byte = ((\1) / 8) ld a, [wEventFlags + event_byte] ENDC bit (\1) % 8, a ENDM ;\1 = reg ;\2 = event index ;\3 = event index this event is relative to (optional, this is needed when there is a fixed flag address) EventFlagBit: MACRO IF _NARG > 2 ld \1, ((\3) % 8) + ((\2) - (\3)) ELSE ld \1, (\2) % 8 ENDC ENDM ;\1 = reg ;\2 = event index EventFlagAddress: MACRO event_byte = ((\2) / 8) ld \1, wEventFlags + event_byte ENDM ;\1 = event index CheckEventHL: MACRO event_byte = ((\1) / 8) ld hl, wEventFlags + event_byte bit (\1) % 8, [hl] ENDM ;\1 = event index CheckEventReuseHL: MACRO IF event_byte != ((\1) / 8) event_byte = ((\1) / 8) ld hl, wEventFlags + event_byte ENDC bit (\1) % 8, [hl] ENDM ; dangerous, only use when HL is guaranteed to be the desired value ;\1 = event index CheckEventForceReuseHL: MACRO event_byte = ((\1) / 8) bit (\1) % 8, [hl] ENDM ;\1 = event index ;\2 = event index of the last event used before the branch CheckEventAfterBranchReuseHL: MACRO event_byte = ((\2) / 8) IF event_byte != ((\1) / 8) event_byte = ((\1) / 8) ld hl, wEventFlags + event_byte ENDC bit (\1) % 8, [hl] ENDM ;\1 = event index CheckAndSetEvent: MACRO event_byte = ((\1) / 8) ld hl, wEventFlags + event_byte bit (\1) % 8, [hl] set (\1) % 8, [hl] ENDM ;\1 = event index CheckAndResetEvent: MACRO event_byte = ((\1) / 8) ld hl, wEventFlags + event_byte bit (\1) % 8, [hl] res (\1) % 8, [hl] ENDM ;\1 = event index CheckAndSetEventA: MACRO ld a, [wEventFlags + ((\1) / 8)] bit (\1) % 8, a set (\1) % 8, a ld [wEventFlags + ((\1) / 8)], a ENDM ;\1 = event index CheckAndResetEventA: MACRO ld a, [wEventFlags + ((\1) / 8)] bit (\1) % 8, a res (\1) % 8, a ld [wEventFlags + ((\1) / 8)], a ENDM ;\1 = event index SetEvent: MACRO event_byte = ((\1) / 8) ld hl, wEventFlags + event_byte set (\1) % 8, [hl] ENDM ;\1 = event index SetEventReuseHL: MACRO IF event_byte != ((\1) / 8) event_byte = ((\1) / 8) ld hl, wEventFlags + event_byte ENDC set (\1) % 8, [hl] ENDM ;\1 = event index ;\2 = event index of the last event used before the branch SetEventAfterBranchReuseHL: MACRO event_byte = ((\2) / 8) IF event_byte != ((\1) / 8) event_byte = ((\1) / 8) ld hl, wEventFlags + event_byte ENDC set (\1) % 8, [hl] ENDM ; dangerous, only use when HL is guaranteed to be the desired value ;\1 = event index SetEventForceReuseHL: MACRO event_byte = ((\1) / 8) set (\1) % 8, [hl] ENDM ;\1 = event index ;\2 = event index ;\3, \4, ... = additional (optional) event indices SetEvents: MACRO SetEvent \1 rept (_NARG + -1) SetEventReuseHL \2 shift endr ENDM ;\1 = event index ResetEvent: MACRO event_byte = ((\1) / 8) ld hl, wEventFlags + event_byte res (\1) % 8, [hl] ENDM ;\1 = event index ResetEventReuseHL: MACRO IF event_byte != ((\1) / 8) event_byte = ((\1) / 8) ld hl, wEventFlags + event_byte ENDC res (\1) % 8, [hl] ENDM ;\1 = event index ;\2 = event index of the last event used before the branch ResetEventAfterBranchReuseHL: MACRO event_byte = ((\2) / 8) IF event_byte != ((\1) / 8) event_byte = ((\1) / 8) ld hl, wEventFlags + event_byte ENDC res (\1) % 8, [hl] ENDM ; dangerous, only use when HL is guaranteed to be the desired value ;\1 = event index ResetEventForceReuseHL: MACRO event_byte = ((\1) / 8) res (\1) % 8, [hl] ENDM ;\1 = event index ;\2 = event index ;\3 = event index (optional) ResetEvents: MACRO ResetEvent \1 rept (_NARG + -1) ResetEventReuseHL \2 shift endr ENDM ;\1 = event index ;\2 = number of bytes away from the base address (optional, for matching the ROM) dbEventFlagBit: MACRO IF _NARG > 1 db ((\1) % 8) + ((\2) * 8) ELSE db ((\1) % 8) ENDC ENDM ;\1 = event index ;\2 = number of bytes away from the base address (optional, for matching the ROM) dwEventFlagAddress: MACRO IF _NARG > 1 dw wEventFlags + ((\1) / 8) - (\2) ELSE dw wEventFlags + ((\1) / 8) ENDC ENDM ;\1 = start ;\2 = end SetEventRange: MACRO event_start_byte = ((\1) / 8) event_end_byte = ((\2) / 8) IF event_end_byte < event_start_byte FAIL "Incorrect argument order in SetEventRange." ENDC IF event_start_byte == event_end_byte ld a, [wEventFlags + event_start_byte] or (1 << (((\2) % 8) + 1)) - (1 << ((\1) % 8)) ld [wEventFlags + event_start_byte], a ELSE event_fill_start = event_start_byte + 1 event_fill_count = event_end_byte - event_start_byte - 1 IF ((\1) % 8) == 0 event_fill_start = event_fill_start + -1 event_fill_count = event_fill_count + 1 ELSE ld a, [wEventFlags + event_start_byte] or $ff - ((1 << ((\1) % 8)) - 1) ld [wEventFlags + event_start_byte], a ENDC IF ((\2) % 8) == 7 event_fill_count = event_fill_count + 1 ENDC IF event_fill_count == 1 ld hl, wEventFlags + event_fill_start ld [hl], $ff ENDC IF event_fill_count > 1 ld a, $ff ld hl, wEventFlags + event_fill_start REPT event_fill_count + -1 ld [hli], a ENDR ld [hl], a ENDC IF ((\2) % 8) == 0 ld hl, wEventFlags + event_end_byte set 0, [hl] ELSE IF ((\2) % 8) != 7 ld a, [wEventFlags + event_end_byte] or (1 << (((\2) % 8) + 1)) - 1 ld [wEventFlags + event_end_byte], a ENDC ENDC ENDC ENDM ;\1 = start ;\2 = end ;\3 = assume a is 0 if present ResetEventRange: MACRO event_start_byte = ((\1) / 8) event_end_byte = ((\2) / 8) IF event_end_byte < event_start_byte FAIL "Incorrect argument order in ResetEventRange." ENDC IF event_start_byte == event_end_byte ld a, [wEventFlags + event_start_byte] and ~((1 << (((\2) % 8) + 1)) - (1 << ((\1) % 8))) & $ff ld [wEventFlags + event_start_byte], a ELSE event_fill_start = event_start_byte + 1 event_fill_count = event_end_byte - event_start_byte - 1 IF ((\1) % 8) == 0 event_fill_start = event_fill_start + -1 event_fill_count = event_fill_count + 1 ELSE ld a, [wEventFlags + event_start_byte] and ~($ff - ((1 << ((\1) % 8)) - 1)) & $ff ld [wEventFlags + event_start_byte], a ENDC IF ((\2) % 8) == 7 event_fill_count = event_fill_count + 1 ENDC IF event_fill_count == 1 ld hl, wEventFlags + event_fill_start ld [hl], 0 ENDC IF event_fill_count > 1 ld hl, wEventFlags + event_fill_start ; force xor a if we just to wrote to it above IF (_NARG < 3) || (((\1) % 8) != 0) xor a ENDC REPT event_fill_count + -1 ld [hli], a ENDR ld [hl], a ENDC IF ((\2) % 8) == 0 ld hl, wEventFlags + event_end_byte res 0, [hl] ELSE IF ((\2) % 8) != 7 ld a, [wEventFlags + event_end_byte] and ~((1 << (((\2) % 8) + 1)) - 1) & $ff ld [wEventFlags + event_end_byte], a ENDC ENDC ENDC ENDM ; returns whether both events are set in Z flag ; This is counter-intuitive because the other event checks set the Z flag when ; the event is not set, but this sets the Z flag when the event is set. ;\1 = event index 1 ;\2 = event index 2 ;\3 = try to reuse a (optional) CheckBothEventsSet: MACRO IF ((\1) / 8) == ((\2) / 8) IF (_NARG < 3) || (((\1) / 8) != event_byte) event_byte = ((\1) / 8) ld a, [wEventFlags + ((\1) / 8)] ENDC and (1 << ((\1) % 8)) | (1 << ((\2) % 8)) cp (1 << ((\1) % 8)) | (1 << ((\2) % 8)) ELSE ; This case doesn't happen in the original ROM. IF ((\1) % 8) == ((\2) % 8) push hl ld a, [wEventFlags + ((\1) / 8)] ld hl, wEventFlags + ((\2) / 8) and [hl] cpl bit ((\1) % 8), a pop hl ELSE push bc ld a, [wEventFlags + ((\1) / 8)] and (1 << ((\1) % 8)) ld b, a ld a, [wEventFlags + ((\2) / 8)] and (1 << ((\2) % 8)) or b cp (1 << ((\1) % 8)) | (1 << ((\2) % 8)) pop bc ENDC ENDC ENDM ; returns the complement of whether either event is set in Z flag ;\1 = event index 1 ;\2 = event index 2 CheckEitherEventSet: MACRO IF ((\1) / 8) == ((\2) / 8) ld a, [wEventFlags + ((\1) / 8)] and (1 << ((\1) % 8)) | (1 << ((\2) % 8)) ELSE ; This case doesn't happen in the original ROM. IF ((\1) % 8) == ((\2) % 8) push hl ld a, [wEventFlags + ((\1) / 8)] ld hl, wEventFlags + ((\2) / 8) or [hl] bit ((\1) % 8), a pop hl ELSE push bc ld a, [wEventFlags + ((\1) / 8)] and (1 << ((\1) % 8)) ld b, a ld a, [wEventFlags + ((\2) / 8)] and (1 << ((\2) % 8)) or b pop bc ENDC ENDC ENDM ; for handling fixed event bits when events are inserted/removed ;\1 = event index ;\2 = fixed flag bit AdjustEventBit: MACRO IF ((\1) % 8) != (\2) add ((\1) % 8) - (\2) ENDC ENDM