ref: b9f2b93c1741c44eaa6468284303d16dde654553
dir: /engine/math/print_num.asm/
_PrintNum:: ; Print c digits of the b-byte value from de to hl. ; Allows 2 to 7 digits. For 1-digit numbers, add ; the value to char "0" instead of calling PrintNum. ; The high nybble of the c register specifies how many of the total amount of ; digits will be in front of the decimal point. ; Some extra flags can be given in bits 5-7 of b. ; Bit 5: money if set (unless left-aligned without leading zeros) ; Bit 6: left-aligned if set ; Bit 7: print leading zeros if set push bc bit 5, b jr z, .main bit 7, b jr nz, .moneyflag bit 6, b jr z, .main .moneyflag ; 101xxxxx or 011xxxxx ld a, "¥" ld [hli], a res 5, b ; 100xxxxx or 010xxxxx .main xor a ldh [hPrintNumBuffer + 0], a ldh [hPrintNumBuffer + 1], a ldh [hPrintNumBuffer + 2], a ld a, b and $f cp 1 jr z, .byte cp 2 jr z, .word ; maximum 3 bytes .long ld a, [de] ldh [hPrintNumBuffer + 1], a inc de ld a, [de] ldh [hPrintNumBuffer + 2], a inc de ld a, [de] ldh [hPrintNumBuffer + 3], a jr .start .word ld a, [de] ldh [hPrintNumBuffer + 2], a inc de ld a, [de] ldh [hPrintNumBuffer + 3], a jr .start .byte ld a, [de] ldh [hPrintNumBuffer + 3], a .start push de ld d, b ld a, c swap a and $f ld e, a ld a, c and $f ld b, a ld c, 0 cp 2 jr z, .two cp 3 jr z, .three cp 4 jr z, .four cp 5 jr z, .five cp 6 jr z, .six .seven ld a, HIGH(1000000 >> 8) ldh [hPrintNumBuffer + 4], a ld a, HIGH(1000000) ; mid ldh [hPrintNumBuffer + 5], a ld a, LOW(1000000) ldh [hPrintNumBuffer + 6], a call .PrintDigit call .AdvancePointer .six ld a, HIGH(100000 >> 8) ldh [hPrintNumBuffer + 4], a ld a, HIGH(100000) ; mid ldh [hPrintNumBuffer + 5], a ld a, LOW(100000) ldh [hPrintNumBuffer + 6], a call .PrintDigit call .AdvancePointer .five xor a ; HIGH(10000 >> 8) ldh [hPrintNumBuffer + 4], a ld a, HIGH(10000) ; mid ldh [hPrintNumBuffer + 5], a ld a, LOW(10000) ldh [hPrintNumBuffer + 6], a call .PrintDigit call .AdvancePointer .four xor a ; HIGH(1000 >> 8) ldh [hPrintNumBuffer + 4], a ld a, HIGH(1000) ; mid ldh [hPrintNumBuffer + 5], a ld a, LOW(1000) ldh [hPrintNumBuffer + 6], a call .PrintDigit call .AdvancePointer .three xor a ; HIGH(100 >> 8) ldh [hPrintNumBuffer + 4], a xor a ; HIGH(100) ; mid ldh [hPrintNumBuffer + 5], a ld a, LOW(100) ldh [hPrintNumBuffer + 6], a call .PrintDigit call .AdvancePointer .two dec e jr nz, .two_skip ld a, "0" ldh [hPrintNumBuffer + 0], a .two_skip ld c, 0 ldh a, [hPrintNumBuffer + 3] .mod_10 cp 10 jr c, .modded_10 sub 10 inc c jr .mod_10 .modded_10 ld b, a ldh a, [hPrintNumBuffer + 0] or c jr nz, .money call .PrintLeadingZero jr .money_leading_zero .money call .PrintYen push af ld a, "0" add c ld [hl], a pop af ldh [hPrintNumBuffer + 0], a inc e dec e jr nz, .money_leading_zero inc hl ld [hl], "<DOT>" .money_leading_zero call .AdvancePointer call .PrintYen ld a, "0" add b ld [hli], a pop de pop bc ret .PrintYen: push af ldh a, [hPrintNumBuffer + 0] and a jr nz, .stop bit 5, d jr z, .stop ld a, "¥" ld [hli], a res 5, d .stop pop af ret .PrintDigit: dec e jr nz, .ok ld a, "0" ldh [hPrintNumBuffer + 0], a .ok ld c, 0 .loop ldh a, [hPrintNumBuffer + 4] ld b, a ldh a, [hPrintNumBuffer + 1] ldh [hPrintNumBuffer + 7], a cp b jr c, .skip1 sub b ldh [hPrintNumBuffer + 1], a ldh a, [hPrintNumBuffer + 5] ld b, a ldh a, [hPrintNumBuffer + 2] ldh [hPrintNumBuffer + 8], a cp b jr nc, .skip2 ldh a, [hPrintNumBuffer + 1] or 0 jr z, .skip3 dec a ldh [hPrintNumBuffer + 1], a ldh a, [hPrintNumBuffer + 2] .skip2 sub b ldh [hPrintNumBuffer + 2], a ldh a, [hPrintNumBuffer + 6] ld b, a ldh a, [hPrintNumBuffer + 3] ldh [hPrintNumBuffer + 9], a cp b jr nc, .skip4 ldh a, [hPrintNumBuffer + 2] and a jr nz, .skip5 ldh a, [hPrintNumBuffer + 1] and a jr z, .skip6 dec a ldh [hPrintNumBuffer + 1], a xor a .skip5 dec a ldh [hPrintNumBuffer + 2], a ldh a, [hPrintNumBuffer + 3] .skip4 sub b ldh [hPrintNumBuffer + 3], a inc c jr .loop .skip6 ldh a, [hPrintNumBuffer + 8] ldh [hPrintNumBuffer + 2], a .skip3 ldh a, [hPrintNumBuffer + 7] ldh [hPrintNumBuffer + 1], a .skip1 ldh a, [hPrintNumBuffer + 0] or c jr z, .PrintLeadingZero ldh a, [hPrintNumBuffer + 0] and a jr nz, .done bit 5, d jr z, .done ld a, "¥" ld [hli], a res 5, d .done ld a, "0" add c ld [hl], a ldh [hPrintNumBuffer + 0], a inc e dec e ret nz inc hl ld [hl], "<DOT>" ret .PrintLeadingZero: ; prints a leading zero unless they are turned off in the flags bit 7, d ; print leading zeroes? ret z ld [hl], "0" ret .AdvancePointer: ; increments the pointer unless leading zeroes are not being printed, ; the number is left-aligned, and no nonzero digits have been printed yet bit 7, d ; print leading zeroes? jr nz, .inc bit 6, d ; left alignment or right alignment? jr z, .inc ldh a, [hPrintNumBuffer + 0] and a ret z .inc inc hl ret