gistfile1.txt

; Macro which allows data to cross over banks, used for map layout data.
; Doesn't support more than 1 bank crossing at a time
; Must have DATA_ADDR and DATA_BANK defined before use.
; ARG 1: name
.macro m_RoomLayoutData
	.FOPEN "build/maps/\1.cmp" m_DataFile
	.FSIZE m_DataFile SIZE
	.FCLOSE m_DataFile
	.REDEFINE SIZE SIZE-1

	.IF DATA_ADDR + SIZE >= $8000
		.REDEFINE DATA_READAMOUNT $8000-DATA_ADDR
		\1: .incbin "build/maps/\1.cmp" SKIP 1 READ DATA_READAMOUNT
		.REDEFINE DATA_BANK DATA_BANK+1
		.BANK DATA_BANK SLOT 1
		.ORGA $4000
                .IF DATA_READAMOUNT < SIZE
                        .incbin "build/maps/\1.cmp" SKIP DATA_READAMOUNT+1
                .ENDIF
		.REDEFINE DATA_ADDR $4000 + SIZE-DATA_READAMOUNT
	.ELSE
		\1: .incbin "build/maps/\1.cmp" SKIP 1
		.REDEFINE DATA_ADDR DATA_ADDR + SIZE
	.ENDIF

	.UNDEFINE SIZE
.endm


; Usage:
.DEFINE DATA_ADDR $4000
.DEFINE DATA_BANK $1d

m_RoomLayoutData room0100
m_RoomLayoutData room0101
m_RoomLayoutData room0102
m_RoomLayoutData room0103
; ...

; Envisioned alternative using INTERBANK sections:

.MACRO m_RoomLayoutDataWithSections
	\1: .incbin "build/maps/\1.cmp" SKIP 1
.ENDM

.SECTION "Room Layout Data" INTERBANK

m_RoomLayoutDataWithSections room0100
m_RoomLayoutDataWithSections room0101
m_RoomLayoutDataWithSections room0102
m_RoomLayoutDataWithSections room0103

.ENDS