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Fixed leading spaces not working in &PRINT

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This commit is contained in:
Quinn Dunki 2016-02-07 14:08:35 -08:00
parent 6a08a561e7
commit 3702d0c50d
1 changed files with 50 additions and 10 deletions
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60
applesoft.s
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@ -30,6 +30,7 @@ LINGET = $da0c ; Read a line number (16-bit integer) into LINNUM
FRMNUM = $dd67 ; Evaluate an expression as a number and store in FAC
CHKCOM = $debe ; Validates current character is a ',', then gets it
SYNCHR = $dec0 ; Validates current character is what's in A
SYNERR = $dec9 ; Beeps and shows a SYNTAX ERROR
AYINT = $e10c ; Convert FAC to 8-bit signed integer
GETBYT = $e6f8 ; Gets an integer at text pointer, stores in X
GETNUM = $e746 ; Gets an 8-bit, stores it X, skips past a comma
@ -254,8 +255,15 @@ WGAmpersandAddrArgument:
; OUT Y : Pointer to a stored copy of the string (MSB)
; Side effects: Clobbers P0/P1 and all registers
WGAmpersandStrArgument:
lda #'"'
jsr SYNCHR ; Expect opening quote
ldy #0
lda #'"' ; Expect opening quote
cmp (TXTPTRL),y ; Can't use SYNERR here because it skips whitespace
bne WGAmpersandStrArgument_error
inc TXTPTRL ; Can't use CHRGET here, because it skips leading whitespace (among other issues)
bne WGAmpersandStrArgument_loop_inc0
inc TXTPTRH
WGAmpersandStrArgument_loop_inc0:
lda TXTPTRL ; Allocate for, and copy the string at TXTPTR
sta PARAM0
@ -265,19 +273,32 @@ WGAmpersandStrArgument:
jsr WGStoreStr
WGAmpersandStrArgument_loop:
jsr CHRGET ; Consume the string for Applesoft
inc TXTPTRL ; Can't use CHRGET here, because it skips leading whitespace (among other issues)
bne WGAmpersandStrArgument_loop_inc1
inc TXTPTRH
WGAmpersandStrArgument_loop_inc1:
lda (TXTPTRL),y
beq WGAmpersandStrArgument_done
cmp #'"' ; Check for closing quote
bne WGAmpersandStrArgument_loop
WGAmpersandStrArgument_done:
lda #'"'
jsr SYNCHR ; Expect closing quote
lda #'"' ; Expect closing quote
cmp (TXTPTRL),y ; Can't use SYNERR here because it skips whitespace
bne WGAmpersandTempStrArgument_error
inc TXTPTRL ; Can't use CHRGET here, because it skips leading whitespace (among other issues)
bne WGAmpersandStrArgument_loop_inc2
inc TXTPTRH
WGAmpersandStrArgument_loop_inc2:
ldx PARAM0
ldy PARAM1
rts
WGAmpersandStrArgument_error:
jmp SYNERR
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; WGAmpersandTempStrArgument
@ -288,8 +309,15 @@ WGAmpersandStrArgument_done:
; OUT A : String length
; Side effects: Clobbers P0/P1 and all registers
WGAmpersandTempStrArgument:
lda #'"'
jsr SYNCHR ; Expect opening quote
ldy #0
lda #'"' ; Expect opening quote
cmp (TXTPTRL),y ; Can't use SYNERR here because it skips whitespace
bne WGAmpersandTempStrArgument_error
inc TXTPTRL ; Can't use CHRGET here, because it skips leading whitespace (among other issues)
bne WGAmpersandTempStrArgument_loop_inc0
inc TXTPTRH
WGAmpersandTempStrArgument_loop_inc0:
lda TXTPTRL ; Grab current TXTPTR
sta PARAM0
@ -297,14 +325,24 @@ WGAmpersandTempStrArgument:
sta PARAM1
WGAmpersandTempStrArgument_loop:
jsr CHRGET ; Consume the string for Applesoft
inc TXTPTRL ; Can't use CHRGET here, because it skips leading whitespace (among other issues)
bne WGAmpersandTempStrArgument_loop_inc1
inc TXTPTRH
WGAmpersandTempStrArgument_loop_inc1:
lda (TXTPTRL),y
beq WGAmpersandTempStrArgument_done
cmp #'"' ; Check for closing quote
bne WGAmpersandTempStrArgument_loop
WGAmpersandTempStrArgument_done:
lda #'"'
jsr SYNCHR ; Expect closing quote
lda #'"' ; Expect closing quote
cmp (TXTPTRL),y ; Can't use SYNERR here because it skips whitespace
bne WGAmpersandTempStrArgument_error
inc TXTPTRL ; Can't use CHRGET here, because it skips leading whitespace (among other issues)
bne WGAmpersandTempStrArgument_loop_inc2
inc TXTPTRH
WGAmpersandTempStrArgument_loop_inc2:
; Compute the 8-bit distance TXTPTR moved. Note that we can't simply
; count in the above loop, because CHRGET will skip ahead unpredictable
@ -320,6 +358,8 @@ WGAmpersandTempStrArgument_done:
rts
WGAmpersandTempStrArgument_error:
jmp SYNERR
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Ampersand API entry points