fixing label names, fixes #11

fixed processing of register pair return value of asmsub

README.md

@@ -109,3 +109,6 @@ Another example (cube3d-sprites.p8) draws the vertices of a rotating 3d cube:
 
 ![cube3d screen](docs/source/_static/cube3d.png)
 
+If you want to play a video game, a fully working Tetris clone is included in the examples:
+
+![tehtriz_screen](docs/source/_static/tehtriz.png)

compiler/res/prog8lib/c64lib.p8

@@ -235,7 +235,7 @@ asmsub	GETIN    () -> clobbers(X,Y) -> (ubyte @ A)		= $FFE4		; (via 810 ($32A))
 asmsub	CLALL    () -> clobbers(A,X) -> ()			= $FFE7		; (via 812 ($32C)) close all files
 asmsub	UDTIM    () -> clobbers(A,X) -> ()			= $FFEA		; update the software clock
 asmsub	SCREEN   () -> clobbers() -> (ubyte @ X, ubyte @ Y)	= $FFED		; read number of screen rows and columns
-asmsub	PLOT     (ubyte dir @ Pc, ubyte col @ Y, ubyte row @ X) -> clobbers() -> (ubyte @ X, ubyte @ Y)	= $FFF0		; read/set position of cursor on screen.  See c64scr.PLOT for a 'safe' wrapper that preserves X.
+asmsub	PLOT     (ubyte dir @ Pc, ubyte col @ Y, ubyte row @ X) -> clobbers() -> (ubyte @ X, ubyte @ Y)	= $FFF0		; read/set position of cursor on screen.  Use c64scr.plot for a 'safe' wrapper that preserves X.
 asmsub	IOBASE   () -> clobbers() -> (uword @ XY)		= $FFF3		; read base address of I/O devices
 
 ; ---- end of C64 kernal routines ----

compiler/res/prog8lib/c64utils.p8

@@ -54,40 +54,39 @@ asmsub  ubyte2hex  (ubyte value @ A) -> clobbers() -> (ubyte @ A, ubyte @ Y)  {
 		pha
 		and  #$0f
 		tax
-		ldy  hex_digits,x
+		ldy  _hex_digits,x
 		pla
 		lsr  a
 		lsr  a
 		lsr  a
 		lsr  a
 		tax
-		lda  hex_digits,x
+		lda  _hex_digits,x
 		ldx  c64.SCRATCH_ZPREGX
 		rts
 
-hex_digits	.text "0123456789abcdef"	; can probably be reused for other stuff as well
+_hex_digits	.text "0123456789abcdef"	; can probably be reused for other stuff as well
 	}}
 }
 
 
-		str  word2hex_output = "1234"   ; 0-terminated, to make printing easier
 asmsub  uword2hex  (uword value @ AY) -> clobbers(A,Y) -> ()  {
-	; ---- convert 16 bit uword in A/Y into 4-character hexadecimal string into memory  'word2hex_output'
+	; ---- convert 16 bit uword in A/Y into 4-character hexadecimal string 'uword2hex.output' (0-terminated)
 	%asm {{
 		sta  c64.SCRATCH_ZPREG
 		tya
 		jsr  ubyte2hex
-		sta  word2hex_output
-		sty  word2hex_output+1
+		sta  output
+		sty  output+1
 		lda  c64.SCRATCH_ZPREG
 		jsr  ubyte2hex
-		sta  word2hex_output+2
-		sty  word2hex_output+3
+		sta  output+2
+		sty  output+3
 		rts
+output	.text  "0000", $00      ; 0-terminated output buffer (to make printing easier)
 	}}
 }
 
-		ubyte[3]  word2bcd_bcdbuff = [0, 0, 0]
 asmsub  uword2bcd  (uword value @ AY) -> clobbers(A,Y) -> ()  {
 	; Convert an 16 bit binary value to BCD
 	;
@@ -106,22 +105,22 @@ asmsub  uword2bcd  (uword value @ AY) -> clobbers(A,Y) -> ()  {
 		sei				; disable interrupts because of bcd math
 		sed				; switch to decimal mode
 		lda  #0				; ensure the result is clear
-		sta  word2bcd_bcdbuff+0
-		sta  word2bcd_bcdbuff+1
-		sta  word2bcd_bcdbuff+2
+		sta  bcdbuff+0
+		sta  bcdbuff+1
+		sta  bcdbuff+2
 		ldy  #16			; the number of source bits
 
 -		asl  c64.SCRATCH_ZPB1		; shift out one bit
 		rol  c64.SCRATCH_ZPREG
-		lda  word2bcd_bcdbuff+0		; and add into result
-		adc  word2bcd_bcdbuff+0
-		sta  word2bcd_bcdbuff+0
-		lda  word2bcd_bcdbuff+1		; propagating any carry
-		adc  word2bcd_bcdbuff+1
-		sta  word2bcd_bcdbuff+1
-		lda  word2bcd_bcdbuff+2		; ... thru whole result
-		adc  word2bcd_bcdbuff+2
-		sta  word2bcd_bcdbuff+2
+		lda  bcdbuff+0		; and add into result
+		adc  bcdbuff+0
+		sta  bcdbuff+0
+		lda  bcdbuff+1		; propagating any carry
+		adc  bcdbuff+1
+		sta  bcdbuff+1
+		lda  bcdbuff+2		; ... thru whole result
+		adc  bcdbuff+2
+		sta  bcdbuff+2
 		dey				; and repeat for next bit
 		bne  -
 		cld				; back to binary
@@ -130,23 +129,24 @@ asmsub  uword2bcd  (uword value @ AY) -> clobbers(A,Y) -> ()  {
 		cli				; enable interrupts again (only if they were enabled before)
 +		rts
 _had_irqd  .byte  0
+bcdbuff  .byte  0,0,0
 	}}
 }
 
 
-		ubyte[5]  word2decimal_output = 0
-asmsub  uword2decimal  (uword value @ AY) -> clobbers(A,Y) -> ()  {
-	; ---- convert 16 bit uword in A/Y into decimal string into memory  'word2decimal_output'
+asmsub  uword2decimal  (uword value @ AY) -> clobbers(A) -> (ubyte @ Y)  {
+	; ---- convert 16 bit uword in A/Y into 0-terminated decimal string into memory  'uword2decimal.output'
+	;      returns length of resulting string in Y
 	%asm {{
 		jsr  uword2bcd
-		lda  word2bcd_bcdbuff+2
+		lda  uword2bcd.bcdbuff+2
 		clc
 		adc  #'0'
-		sta  word2decimal_output
+		sta  output
 		ldy  #1
-		lda  word2bcd_bcdbuff+1
+		lda  uword2bcd.bcdbuff+1
 		jsr  +
-		lda  word2bcd_bcdbuff+0
+		lda  uword2bcd.bcdbuff+0
 
 +		pha
 		lsr  a
@@ -155,153 +155,135 @@ asmsub  uword2decimal  (uword value @ AY) -> clobbers(A,Y) -> ()  {
 		lsr  a
 		clc
 		adc  #'0'
-		sta  word2decimal_output,y
+		sta  output,y
 		iny
 		pla
 		and  #$0f
 		adc  #'0'
-		sta  word2decimal_output,y
+		sta  output,y
 		iny
-		rts
-	}}
-
-}
-
-
-asmsub  str2byte  (str string @ AY) -> clobbers(Y) -> (byte @ A) {
-	%asm {{
-		; -- convert string (address in A/Y) to byte in A
-		;    doesn't use any kernal routines
-		sta  c64.SCRATCH_ZPWORD1
-		sty  c64.SCRATCH_ZPWORD1+1
-		ldy  #0
-		lda  (c64.SCRATCH_ZPWORD1),y
-		cmp  #'-'
-		beq  +
-		jmp  str2ubyte._enter
-+		inc  c64.SCRATCH_ZPWORD1
-		bne  +
-		inc  c64.SCRATCH_ZPWORD1+1
-+		jsr  str2ubyte._enter
-		eor  #$ff
-		sec
-		adc  #0
-		rts
-	}}
-}
-
-asmsub  str2ubyte  (str string @ AY) -> clobbers(Y) -> (ubyte @ A) {
-	%asm {{
-		; -- convert string (address in A/Y) to ubyte in A
-		;    doesn't use any kernal routines
-		sta  c64.SCRATCH_ZPWORD1
-		sty  c64.SCRATCH_ZPWORD1+1
-_enter		jsr  _numlen			; Y= slen
 		lda  #0
-		dey
-		bpl  +
+		sta  output,y
 		rts
-+		lda  (c64.SCRATCH_ZPWORD1),y
-		sec
-		sbc  #'0'
-		dey
-		bpl  +
-		rts
-+		sta  c64.SCRATCH_ZPREG		;result
-		lda  (c64.SCRATCH_ZPWORD1),y
-		sec
-		sbc  #'0'
-		asl  a
-		sta  c64.SCRATCH_ZPB1
-		asl  a
-		asl  a
-		clc
-		adc  c64.SCRATCH_ZPB1
-		clc
-		adc  c64.SCRATCH_ZPREG
-		dey
-		bpl  +
-		rts
-+		sta  c64.SCRATCH_ZPREG
-		lda  (c64.SCRATCH_ZPWORD1),y
-		tay
-		lda  _hundreds-'0',y
-		clc
-		adc  c64.SCRATCH_ZPREG
-		rts
-_hundreds	.byte  0, 100, 200
 
-_numlen
-		;-- return the length of the numeric string at ZPWORD1, in Y
+output  .text  "00000", $00     ; 0 terminated
+
+	}}
+
+}
+
+
+asmsub str2uword(str string @ AY) -> clobbers() -> (uword @ AY) {
+	; -- returns the unsigned word value of the string number argument in AY
+	;    the number may NOT be preceded by a + sign and may NOT contain spaces
+	;    (any non-digit character will terminate the number string that is parsed)
+	%asm {{
+_result = c64.SCRATCH_ZPWORD2
+		sta  _mod+1
+		sty  _mod+2
 		ldy  #0
--		lda  (c64.SCRATCH_ZPWORD1),y
-		cmp  #'0'
-		bmi  +
-		cmp  #':'	; one after '9'
+		sty  _result
+		sty  _result+1
+_mod		lda  $ffff,y		; modified
+		sec
+		sbc  #48
 		bpl  +
-		iny
-		bne  -
-+		rts
+_done		; return result
+		lda  _result
+		ldy  _result+1
+		rts
++		cmp  #10
+		bcs  _done
+		; add digit to result
+		pha
+		jsr  _result_times_10
+		pla
+		clc
+		adc  _result
+		sta  _result
+		bcc  +
+		inc  _result+1
++		iny
+		bne  _mod
+		; never reached
 
+_result_times_10     ; (W*4 + W)*2
+		lda  _result+1
+		sta  c64.SCRATCH_ZPREG
+		lda  _result
+		asl  a
+		rol  c64.SCRATCH_ZPREG
+		asl  a
+		rol  c64.SCRATCH_ZPREG
+		clc
+		adc  _result
+		sta  _result
+		lda  c64.SCRATCH_ZPREG
+		adc  _result+1
+		asl  _result
+		rol  a
+		sta  _result+1
+		rts
 	}}
 }
 
 
-asmsub	c64flt_FREADSTR	(ubyte length @ A) -> clobbers(A,X,Y) -> ()	= $b7b5		; @todo needed for (slow) str conversion below
-asmsub	c64flt_GETADR	() -> clobbers(X) -> (ubyte @ Y, ubyte @ A)	= $b7f7		; @todo needed for (slow) str conversion below
-asmsub	c64flt_FTOSWORDYA  () -> clobbers(X) -> (ubyte @ Y, ubyte @ A)	= $b1aa		; @todo needed for (slow) str conversion below
-
-asmsub  str2uword(str string @ AY) -> clobbers() -> (uword @ AY) {
+asmsub str2word(str string @ AY) -> clobbers() -> (word @ AY) {
+	; -- returns the signed word value of the string number argument in AY
+	;    the number may be preceded by a + or - sign but may NOT contain spaces
+	;    (any non-digit character will terminate the number string that is parsed)
 	%asm {{
-		;-- convert string (address in A/Y) to uword number in A/Y
-		;   @todo don't use the (slow) kernel floating point conversion
-		sta  $22
-		sty  $23
-		jsr  _strlen2233
-		tya
-		stx  c64.SCRATCH_ZPREGX
-		jsr  c64flt_FREADSTR			; string to fac1
-		jsr  c64flt_GETADR			; fac1 to unsigned word in Y/A
-		ldx  c64.SCRATCH_ZPREGX
-		sta  c64.SCRATCH_ZPREG
-		tya
-		ldy  c64.SCRATCH_ZPREG
-		rts
-
-_strlen2233
-		;-- return the length of the (zero-terminated) string at $22/$23, in Y
+_result = c64.SCRATCH_ZPWORD2
+		sta  c64.SCRATCH_ZPWORD1
+		sty  c64.SCRATCH_ZPWORD1+1
 		ldy  #0
--		lda  ($22),y
+		sty  _result
+		sty  _result+1
+		sty  _negative
+		lda  (c64.SCRATCH_ZPWORD1),y
+		cmp  #'+'
+		bne  +
+		iny
++		cmp  #'-'
+		bne  _parse
+		inc  _negative
+		iny
+_parse		lda  (c64.SCRATCH_ZPWORD1),y
+		sec
+		sbc  #48
+		bpl  _digit
+_done		; return result
+		lda  _negative
 		beq  +
-		iny
-		bne  -
-+		rts
-	}}
-}
-
-asmsub  str2word(str string @ AY) -> clobbers() -> (word @ AY) {
-	%asm {{
-		;-- convert string (address in A/Y) to signed word number in A/Y
-		;   @todo don't use the (slow) kernel floating point conversion
-		sta  $22
-		sty  $23
-		jsr  str2uword._strlen2233
-		tya
-		stx  c64.SCRATCH_ZPREGX
-		jsr  c64flt_FREADSTR		; string to fac1
-		jsr  c64flt_FTOSWORDYA		; fac1 to unsigned word in Y/A
-		ldx  c64.SCRATCH_ZPREGX
-		sta  c64.SCRATCH_ZPREG
-		tya
-		ldy  c64.SCRATCH_ZPREG
+		sec
+		lda  #0
+		sbc  _result
+		sta  _result
+		lda  #0
+		sbc  _result+1
+		sta  _result+1
++		lda  _result
+		ldy  _result+1
 		rts
+_digit		cmp  #10
+		bcs  _done
+		; add digit to result
+		pha
+		jsr  str2uword._result_times_10
+		pla
+		clc
+		adc  _result
+		sta  _result
+		bcc  +
+		inc  _result+1
++		iny
+		bne  _parse
+		; never reached
+_negative	.byte  0
 	}}
 }
 
 
-; @todo string to 32 bit unsigned integer http://www.6502.org/source/strings/ascii-to-32bit.html
-
-
 asmsub  set_irqvec_excl() -> clobbers(A) -> ()  {
 	%asm {{
 		sei
@@ -311,7 +293,9 @@ asmsub  set_irqvec_excl() -> clobbers(A) -> ()  {
 		sta  c64.CINV+1
 		cli
 		rts
-_irq_handler	jsr  irq.irq
+_irq_handler	jsr  set_irqvec._irq_handler_init
+		jsr  irq.irq
+		jsr  set_irqvec._irq_handler_end
 		lda  #$ff
 		sta  c64.VICIRQ			; acknowledge raster irq
 		lda  c64.CIA1ICR		; acknowledge CIA1 interrupt
@@ -328,10 +312,64 @@ asmsub  set_irqvec() -> clobbers(A) -> ()  {
 		sta  c64.CINV+1
 		cli
 		rts
-_irq_handler    jsr  irq.irq
+_irq_handler    jsr  _irq_handler_init
+		jsr  irq.irq
+		jsr  _irq_handler_end
 		jmp  c64.IRQDFRT		; continue with normal kernel irq routine
 
-	}}
+_irq_handler_init
+		; save all zp scratch registers and the X register as these might be clobbered by the irq routine
+		stx  IRQ_X_REG
+		lda  c64.SCRATCH_ZPB1
+		sta  IRQ_SCRATCH_ZPB1
+		lda  c64.SCRATCH_ZPREG
+		sta  IRQ_SCRATCH_ZPREG
+		lda  c64.SCRATCH_ZPREGX
+		sta  IRQ_SCRATCH_ZPREGX
+		lda  c64.SCRATCH_ZPWORD1
+		sta  IRQ_SCRATCH_ZPWORD1
+		lda  c64.SCRATCH_ZPWORD1+1
+		sta  IRQ_SCRATCH_ZPWORD1+1
+		lda  c64.SCRATCH_ZPWORD2
+		sta  IRQ_SCRATCH_ZPWORD2
+		lda  c64.SCRATCH_ZPWORD2+1
+		sta  IRQ_SCRATCH_ZPWORD2+1
+		; stack protector; make sure we don't clobber the top of the evaluation stack
+		dex
+		dex
+		dex
+		dex
+		dex
+		dex
+		rts
+
+_irq_handler_end
+		; restore all zp scratch registers and the X register
+		lda  IRQ_SCRATCH_ZPB1
+		sta  c64.SCRATCH_ZPB1
+		lda  IRQ_SCRATCH_ZPREG
+		sta  c64.SCRATCH_ZPREG
+		lda  IRQ_SCRATCH_ZPREGX
+		sta  c64.SCRATCH_ZPREGX
+		lda  IRQ_SCRATCH_ZPWORD1
+		sta  c64.SCRATCH_ZPWORD1
+		lda  IRQ_SCRATCH_ZPWORD1+1
+		sta  c64.SCRATCH_ZPWORD1+1
+		lda  IRQ_SCRATCH_ZPWORD2
+		sta  c64.SCRATCH_ZPWORD2
+		lda  IRQ_SCRATCH_ZPWORD2+1
+		sta  c64.SCRATCH_ZPWORD2+1
+		ldx  IRQ_X_REG
+		rts
+
+IRQ_X_REG		.byte  0
+IRQ_SCRATCH_ZPB1	.byte  0
+IRQ_SCRATCH_ZPREG	.byte  0
+IRQ_SCRATCH_ZPREGX	.byte  0
+IRQ_SCRATCH_ZPWORD1	.word  0
+IRQ_SCRATCH_ZPWORD2	.word  0
+
+		}}
 }
 
 
@@ -364,7 +402,9 @@ asmsub  set_rasterirq(uword rasterpos @ AY) -> clobbers(A) -> () {
 		rts
 
 _raster_irq_handler
+		jsr  set_irqvec._irq_handler_init
 		jsr  irq.irq
+		jsr  set_irqvec._irq_handler_end
 		lda  #$ff
 		sta  c64.VICIRQ			; acknowledge raster irq
 		jmp  c64.IRQDFRT
@@ -403,7 +443,9 @@ asmsub  set_rasterirq_excl(uword rasterpos @ AY) -> clobbers(A) -> () {
 		rts
 
 _raster_irq_handler
+		jsr  set_irqvec._irq_handler_init
 		jsr  irq.irq
+		jsr  set_irqvec._irq_handler_end
 		lda  #$ff
 		sta  c64.VICIRQ			; acknowledge raster irq
 		jmp  c64.IRQDFEND		; end irq processing - don't call kernel
@@ -480,7 +522,7 @@ _loop		sta  c64.Colors,y
 }
 
 
-asmsub scroll_left_full  (ubyte alsocolors @ Pc) -> clobbers(A, Y) -> ()  {
+asmsub  scroll_left_full  (ubyte alsocolors @ Pc) -> clobbers(A, Y) -> ()  {
 	; ---- scroll the whole screen 1 character to the left
 	;      contents of the rightmost column are unchanged, you should clear/refill this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -541,7 +583,7 @@ _scroll_screen  ; scroll the screen memory
 }
 
 
-asmsub scroll_right_full  (ubyte alsocolors @ Pc) -> clobbers(A) -> ()  {
+asmsub  scroll_right_full  (ubyte alsocolors @ Pc) -> clobbers(A) -> ()  {
 	; ---- scroll the whole screen 1 character to the right
 	;      contents of the leftmost column are unchanged, you should clear/refill this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -594,7 +636,7 @@ _scroll_screen  ; scroll the screen memory
 }
 
 
-asmsub scroll_up_full  (ubyte alsocolors @ Pc) -> clobbers(A) -> ()  {
+asmsub  scroll_up_full  (ubyte alsocolors @ Pc) -> clobbers(A) -> ()  {
 	; ---- scroll the whole screen 1 character up
 	;      contents of the bottom row are unchanged, you should refill/clear this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -647,7 +689,7 @@ _scroll_screen  ; scroll the screen memory
 }
 
 
-asmsub scroll_down_full  (ubyte alsocolors @ Pc) -> clobbers(A) -> ()  {
+asmsub  scroll_down_full  (ubyte alsocolors @ Pc) -> clobbers(A) -> ()  {
 	; ---- scroll the whole screen 1 character down
 	;      contents of the top row are unchanged, you should refill/clear this yourself
 	;      Carry flag determines if screen color data must be scrolled too
@@ -720,27 +762,6 @@ asmsub  print (str text @ AY) -> clobbers(A,Y) -> ()  {
 }
 
 
-asmsub  print_p  (str_p text @ AY) -> clobbers(A) -> (ubyte @ Y)  {
-	; ---- print pstring (length as first byte) from A/Y, returns str len in Y
-	%asm {{
-		sta  c64.SCRATCH_ZPB1
-		sty  c64.SCRATCH_ZPREG
-		stx  c64.SCRATCH_ZPREGX
-		ldy  #0
-		lda  (c64.SCRATCH_ZPB1),y
-		beq  +
-		tax
--		iny
-		lda  (c64.SCRATCH_ZPB1),y
-		jsr  c64.CHROUT
-		dex
-		bne  -
-+		ldx  c64.SCRATCH_ZPREGX
-		rts 		; output string length is in Y
-	}}
-}
-
-
 asmsub  print_ub0  (ubyte value @ A) -> clobbers(A,Y) -> ()  {
 	; ---- print the ubyte in A in decimal form, with left padding 0s (3 positions total)
 	%asm {{
@@ -873,7 +894,7 @@ asmsub  print_uw0  (uword value @ AY) -> clobbers(A,Y) -> ()  {
 	%asm {{
 		jsr  c64utils.uword2decimal
 		ldy  #0
--		lda  c64utils.word2decimal_output,y
+-		lda  c64utils.uword2decimal.output,y
 		jsr  c64.CHROUT
 		iny
 		cpy  #5
@@ -888,25 +909,25 @@ asmsub  print_uw  (uword value @ AY) -> clobbers(A,Y) -> ()  {
 	%asm {{
 		jsr  c64utils.uword2decimal
 		ldy  #0
-		lda  c64utils.word2decimal_output
+		lda  c64utils.uword2decimal.output
 		cmp  #'0'
 		bne  _pr_decimal
 		iny
-		lda  c64utils.word2decimal_output+1
+		lda  c64utils.uword2decimal.output+1
 		cmp  #'0'
 		bne  _pr_decimal
 		iny
-		lda  c64utils.word2decimal_output+2
+		lda  c64utils.uword2decimal.output+2
 		cmp  #'0'
 		bne  _pr_decimal
 		iny
-		lda  c64utils.word2decimal_output+3
+		lda  c64utils.uword2decimal.output+3
 		cmp  #'0'
 		bne  _pr_decimal
 		iny
 
 _pr_decimal
-		lda  c64utils.word2decimal_output,y
+		lda  c64utils.uword2decimal.output,y
 		jsr  c64.CHROUT
 		iny
 		cpy  #5
@@ -916,7 +937,7 @@ _pr_decimal
 }
 
 asmsub  print_w  (word value @ AY) -> clobbers(A,Y) -> ()  {
-	; ---- print the (signed) word in A/Y in decimal form, without left padding 0s
+	; ---- print the (signed) word in A/Y in decimal form, without left padding 0's
 	%asm {{
 		cpy  #0
 		bpl  +
@@ -937,7 +958,7 @@ asmsub  print_w  (word value @ AY) -> clobbers(A,Y) -> ()  {
 }
 
 asmsub  input_chars  (uword buffer @ AY) -> clobbers(A) -> (ubyte @ Y)  {
-	; ---- Input a string (max. 80 chars) from the keyboard. Returns length in Y.
+	; ---- Input a string (max. 80 chars) from the keyboard. Returns length in Y. (string is terminated with a 0 byte as well)
 	;      It assumes the keyboard is selected as I/O channel!
 
 	%asm {{
@@ -1065,7 +1086,7 @@ _colormod	sta  $ffff		; modified
 	}}
 }
 
-asmsub  PLOT  (ubyte col @ Y, ubyte row @ A) -> clobbers(A) -> () {
+asmsub  plot  (ubyte col @ Y, ubyte row @ A) -> clobbers(A) -> () {
 	; ---- safe wrapper around PLOT kernel routine, to save the X register.
 	%asm  {{
 		stx  c64.SCRATCH_ZPREGX

compiler/res/prog8lib/prog8lib.asm

@@ -649,7 +649,57 @@ func_read_flags	.proc
 		rts
 		.pend
 		
+		
+func_sqrt16	.proc
+		lda  c64.ESTACK_LO+1,x
+		sta  c64.SCRATCH_ZPWORD2
+		lda  c64.ESTACK_HI+1,x
+		sta  c64.SCRATCH_ZPWORD2+1
+		stx  c64.SCRATCH_ZPREGX
+		ldy  #$00    ; r = 0
+		ldx  #$07
+		clc         ; clear bit 16 of m
+_loop
+		tya
+		ora  _stab-1,x
+		sta  c64.SCRATCH_ZPB1     ; (r asl 8) | (d asl 7)
+		lda  c64.SCRATCH_ZPWORD2+1
+		bcs  _skip0  ; m >= 65536? then t <= m is always true
+		cmp  c64.SCRATCH_ZPB1
+		bcc  _skip1  ; t <= m
+_skip0
+		sbc  c64.SCRATCH_ZPB1
+		sta  c64.SCRATCH_ZPWORD2+1     ; m = m - t
+		tya
+		ora  _stab,x
+		tay         ; r = r or d
+_skip1
+		asl  c64.SCRATCH_ZPWORD2
+		rol  c64.SCRATCH_ZPWORD2+1     ; m = m asl 1
+		dex
+		bne  _loop
 
+		; last iteration
+		bcs  _skip2
+		sty  c64.SCRATCH_ZPB1
+		lda  c64.SCRATCH_ZPWORD2
+		cmp  #$80
+		lda  c64.SCRATCH_ZPWORD2+1
+		sbc  c64.SCRATCH_ZPB1
+		bcc  _skip3
+_skip2
+		iny         ; r = r or d (d is 1 here)
+_skip3
+		ldx  c64.SCRATCH_ZPREGX
+		tya
+		sta  c64.ESTACK_LO+1,x
+		lda  #0
+		sta  c64.ESTACK_HI+1,x
+		rts
+_stab   .byte $01,$02,$04,$08,$10,$20,$40,$80
+		.pend
+		
+		
 func_sin8	.proc
 		ldy  c64.ESTACK_LO+1,x
 		lda  _sinecos8,y
@@ -1112,8 +1162,7 @@ _gtequ		dey
 _result_minw	.word  0
 		.pend
 
-
-func_len_str	.proc
+func_strlen	.proc
 	; -- push length of 0-terminated string on stack
 		jsr  peek_address
 		ldy  #0
@@ -1126,15 +1175,6 @@ func_len_str	.proc
 		rts
 		.pend
 
-func_len_strp	.proc
-	; -- push length of pascal-string on stack
-		jsr  peek_address
-		ldy  #0
-		lda  (c64.SCRATCH_ZPWORD1),y	; first byte is length
-		sta  c64.ESTACK_LO+1,x
-		rts
-		.pend
-
 func_rnd	.proc
 	; -- put a random ubyte on the estack
 		jsr  math.randbyte

compiler/res/version.txt

@@ -1 +1 @@
-1.3 (beta)
+1.5 (beta)

compiler/src/prog8/CompilerMain.kt

@@ -88,7 +88,7 @@ private fun compileMain(args: Array<String>) {
             println("Syntax check...")
             val heap = HeapValues()
             val time1= measureTimeMillis {
-                moduleAst.checkIdentifiers(heap)
+                moduleAst.checkIdentifiers(namespace)
             }
             //println(" time1: $time1")
             val time2 = measureTimeMillis {
@@ -104,9 +104,7 @@ private fun compileMain(args: Array<String>) {
             }
             //println(" time4: $time4")
 
-            val allScopedSymbolDefinitions = moduleAst.checkIdentifiers(heap)       // useful for checking symbol usage later?
-//            moduleAst.simplifyExpressions(namespace, heap)
-//            moduleAst.optimizeStatements(namespace, heap)
+            moduleAst.checkIdentifiers(namespace)
             if(optimize) {
                 // optimize the parse tree
                 println("Optimizing...")

compiler/src/prog8/ast/AST.kt

@@ -26,9 +26,7 @@ enum class DataType {
     WORD,
     FLOAT,
     STR,
-    STR_P,
     STR_S,
-    STR_PS,
     ARRAY_UB,
     ARRAY_B,
     ARRAY_UW,
@@ -44,9 +42,7 @@ enum class DataType {
                 WORD -> targetType == WORD || targetType==UWORD || targetType == FLOAT
                 FLOAT -> targetType == FLOAT
                 STR -> targetType == STR || targetType==STR_S || targetType == UWORD
-                STR_P -> targetType == STR_P || targetType==STR_PS || targetType == UWORD
                 STR_S -> targetType == STR || targetType==STR_S || targetType == UWORD
-                STR_PS -> targetType == STR_P || targetType==STR_PS || targetType == UWORD
                 ARRAY_UB -> targetType == UWORD || targetType==ARRAY_UB
                 ARRAY_B -> targetType == UWORD  || targetType==ARRAY_B
                 ARRAY_UW -> targetType == UWORD || targetType==ARRAY_UW
@@ -98,7 +94,6 @@ enum class BranchCondition {
 
 val IterableDatatypes = setOf(
         DataType.STR, DataType.STR_S,
-        DataType.STR_P, DataType.STR_PS,  // note: these are a bit weird they store their length as the first byte
         DataType.ARRAY_UB, DataType.ARRAY_B,
         DataType.ARRAY_UW, DataType.ARRAY_W,
         DataType.ARRAY_F)
@@ -107,7 +102,7 @@ val ByteDatatypes = setOf(DataType.UBYTE, DataType.BYTE)
 val WordDatatypes = setOf(DataType.UWORD, DataType.WORD)
 val IntegerDatatypes = setOf(DataType.UBYTE, DataType.BYTE, DataType.UWORD, DataType.WORD)
 val NumericDatatypes = setOf(DataType.UBYTE, DataType.BYTE, DataType.UWORD, DataType.WORD, DataType.FLOAT)
-val StringDatatypes = setOf(DataType.STR, DataType.STR_P, DataType.STR_S, DataType.STR_PS)
+val StringDatatypes = setOf(DataType.STR, DataType.STR_S)
 val ArrayDatatypes = setOf(DataType.ARRAY_UB, DataType.ARRAY_B, DataType.ARRAY_UW, DataType.ARRAY_W, DataType.ARRAY_F)
 
 
@@ -330,8 +325,11 @@ inline fun <reified T> findParentNode(node: Node): T? {
 
 interface IStatement : Node {
     fun process(processor: IAstProcessor) : IStatement
-    fun makeScopedName(name: String): List<String> {
-        // this is usually cached in a lazy property on the statement object itself
+    fun makeScopedName(name: String): String {
+        // easy way out is to always return the full scoped name.
+        // it would be nicer to find only the minimal prefixed scoped name, but that's too much hassle for now.
+        // and like this, we can cache the name even,
+        // like in a lazy property on the statement object itself (label, subroutine, vardecl)
         val scope = mutableListOf<String>()
         var statementScope = this.parent
         while(statementScope !is ParentSentinel && statementScope !is Module) {
@@ -340,8 +338,9 @@ interface IStatement : Node {
             }
             statementScope = statementScope.parent
         }
-        scope.add(name)
-        return scope
+        if(name.isNotEmpty())
+            scope.add(name)
+        return scope.joinToString(".")
     }
 }
 
@@ -512,7 +511,6 @@ class Block(override val name: String,
             val isInLibrary: Boolean,
             override val position: Position) : IStatement, INameScope {
     override lateinit var parent: Node
-    val scopedname: String by lazy { makeScopedName(name).joinToString(".") }
 
     override fun linkParents(parent: Node) {
         this.parent = parent
@@ -552,7 +550,6 @@ data class DirectiveArg(val str: String?, val name: String?, val int: Int?, over
 
 data class Label(val name: String, override val position: Position) : IStatement {
     override lateinit var parent: Node
-    val scopedname: String by lazy { makeScopedName(name).joinToString(".") }
 
     override fun linkParents(parent: Node) {
         this.parent = parent
@@ -563,6 +560,8 @@ data class Label(val name: String, override val position: Position) : IStatement
     override fun toString(): String {
         return "Label(name=$name, pos=$position)"
     }
+
+    val scopedname: String by lazy { makeScopedName(name) }
 }
 
 
@@ -690,7 +689,7 @@ class VarDecl(val type: VarDeclType,
 
     override fun process(processor: IAstProcessor) = processor.process(this)
 
-    val scopedname: String by lazy { makeScopedName(name).joinToString(".") }
+    val scopedname: String by lazy { makeScopedName(name) }
 
     override fun toString(): String {
         return "VarDecl(name=$name, vartype=$type, datatype=$datatype, value=$value, pos=$position)"
@@ -1161,14 +1160,15 @@ class LiteralValue(val type: DataType,
             DataType.UWORD -> "uword:$wordvalue"
             DataType.WORD -> "word:$wordvalue"
             DataType.FLOAT -> "float:$floatvalue"
-            DataType.STR, DataType.STR_P, DataType.STR_S, DataType.STR_PS-> {
+            in StringDatatypes -> {
                 if(heapId!=null) "str:#$heapId"
                 else "str:$initialstrvalue"
             }
-            DataType.ARRAY_UB, DataType.ARRAY_B, DataType.ARRAY_UW, DataType.ARRAY_W, DataType.ARRAY_F -> {
+            in ArrayDatatypes -> {
                 if(heapId!=null) "arrayspec:#$heapId"
                 else "arrayspec:$arrayvalue"
             }
+            else -> throw FatalAstException("weird datatype")
         }
         return "LiteralValue($vstr)"
     }
@@ -1274,7 +1274,7 @@ class LiteralValue(val type: DataType,
                         return LiteralValue(targettype, wordvalue = value, position = position)
                 }
             }
-            DataType.STR, DataType.STR_P,  DataType.STR_S, DataType.STR_PS -> {
+            in StringDatatypes -> {
                 if(targettype in StringDatatypes)
                     return this
             }
@@ -1316,9 +1316,7 @@ class RangeExpr(var from: IExpression,
             fromDt==DataType.UBYTE && toDt==DataType.UBYTE -> DataType.UBYTE
             fromDt==DataType.UWORD && toDt==DataType.UWORD -> DataType.UWORD
             fromDt==DataType.STR && toDt==DataType.STR -> DataType.STR
-            fromDt==DataType.STR_P && toDt==DataType.STR_P -> DataType.STR_P
             fromDt==DataType.STR_S && toDt==DataType.STR_S -> DataType.STR_S
-            fromDt==DataType.STR_PS && toDt==DataType.STR_PS -> DataType.STR_PS
             fromDt==DataType.WORD || toDt==DataType.WORD -> DataType.WORD
             fromDt==DataType.BYTE || toDt==DataType.BYTE -> DataType.BYTE
             else -> DataType.UBYTE
@@ -1590,7 +1588,7 @@ class AnonymousScope(override var statements: MutableList<IStatement>,
     override lateinit var parent: Node
 
     init {
-        name = "<<<anonymous-$sequenceNumber>>>"
+        name = "<anon-$sequenceNumber>"     // make sure it's an invalid soruce code identifier so user source code can never produce it
         sequenceNumber++
     }
 
@@ -1631,7 +1629,7 @@ class Subroutine(override val name: String,
                  override var statements: MutableList<IStatement>,
                  override val position: Position) : IStatement, INameScope {
     override lateinit var parent: Node
-    val scopedname: String by lazy { makeScopedName(name).joinToString(".") }
+    val scopedname: String by lazy { makeScopedName(name) }
 
     override fun linkParents(parent: Node) {
         this.parent = parent
@@ -1651,7 +1649,7 @@ class Subroutine(override val name: String,
             .map { (it as InlineAssembly).assembly }
             .count { " rti" in it || "\trti" in it || " rts" in it || "\trts" in it || " jmp" in it || "\tjmp" in it }
 
-    val canBeAsmSubroutine =false // TODO see below
+    val canBeAsmSubroutine =false // TODO disabled for now, see below about problem with converting to asm subroutine
 //            !isAsmSubroutine
 //                    && ((parameters.size == 1 && parameters[0].type in setOf(DataType.BYTE, DataType.UBYTE, DataType.WORD, DataType.UWORD))
 //                    || (parameters.size == 2 && parameters.map { it.type }.all { it == DataType.BYTE || it == DataType.UBYTE }))
@@ -2289,31 +2287,6 @@ private fun prog8Parser.RepeatloopContext.toAst(): RepeatLoop {
 }
 
 
-internal fun registerSet(asmReturnvaluesRegisters: Iterable<RegisterOrStatusflag>): Set<Register> {
-    val resultRegisters = mutableSetOf<Register>()
-    for(x in asmReturnvaluesRegisters) {
-        when(x.registerOrPair) {
-            RegisterOrPair.A -> resultRegisters.add(Register.A)
-            RegisterOrPair.X -> resultRegisters.add(Register.X)
-            RegisterOrPair.Y -> resultRegisters.add(Register.Y)
-            RegisterOrPair.AX -> {
-                resultRegisters.add(Register.A)
-                resultRegisters.add(Register.X)
-            }
-            RegisterOrPair.AY -> {
-                resultRegisters.add(Register.A)
-                resultRegisters.add(Register.Y)
-            }
-            RegisterOrPair.XY -> {
-                resultRegisters.add(Register.X)
-                resultRegisters.add(Register.Y)
-            }
-        }
-    }
-    return resultRegisters
-}
-
-
 internal fun escape(str: String) = str.replace("\t", "\\t").replace("\n", "\\n").replace("\r", "\\r")
 
 internal fun unescape(str: String, position: Position): String {

compiler/src/prog8/ast/AstChecker.kt

@@ -139,9 +139,6 @@ private class AstChecker(private val namespace: INameScope,
         if(forLoop.body.isEmpty())
             printWarning("for loop body is empty", forLoop.position)
 
-        if(forLoop.iterable is LiteralValue)
-            checkResult.add(SyntaxError("currently not possible to loop over a literal value directly, define it as a variable instead", forLoop.position))      // todo loop over literals (by creating a generated variable)
-
         if(!forLoop.iterable.isIterable(namespace, heap)) {
             checkResult.add(ExpressionError("can only loop over an iterable type", forLoop.position))
         } else {
@@ -358,23 +355,17 @@ private class AstChecker(private val namespace: INameScope,
         // assigning from a functioncall COULD return multiple values (from an asm subroutine)
         if(assignment.value is FunctionCall) {
             val stmt = (assignment.value as FunctionCall).target.targetStatement(namespace)
-            if (stmt is Subroutine && stmt.returntypes.size > 1) {
+            if (stmt is Subroutine) {
                 if (stmt.isAsmSubroutine) {
                     if (stmt.returntypes.size != assignment.targets.size)
                         checkResult.add(ExpressionError("number of return values doesn't match number of assignment targets", assignment.value.position))
                     else {
-                        if (assignment.targets.all { it.register != null }) {
-                            val returnRegisters = registerSet(stmt.asmReturnvaluesRegisters)
-                            val targetRegisters = assignment.targets.filter { it.register != null }.map { it.register }.toSet()
-                            if (returnRegisters != targetRegisters)
-                                checkResult.add(ExpressionError("asmsub return registers $returnRegisters don't match assignment target registers", assignment.position))
-                        }
                         for (thing in stmt.returntypes.zip(assignment.targets)) {
                             if (thing.second.determineDatatype(namespace, heap, assignment) != thing.first)
                                 checkResult.add(ExpressionError("return type mismatch for target ${thing.second.shortString()}", assignment.value.position))
                         }
                     }
-                } else
+                } else if(assignment.targets.size>1)
                     checkResult.add(ExpressionError("only asmsub subroutines can return multiple values", assignment.value.position))
             }
         }
@@ -695,12 +686,23 @@ private class AstChecker(private val namespace: INameScope,
                         checkResult.add(ExpressionError("remainder can only be used on unsigned integer operands", expr.right.position))
                 }
             }
-            "and", "or", "xor", "&", "|", "^" -> {
+            "and", "or", "xor" -> {
+                // only integer numeric operands accepted, and if literal constants, only boolean values accepted (0 or 1)
+                val rightDt = expr.right.resultingDatatype(namespace, heap)
+                val leftDt = expr.left.resultingDatatype(namespace, heap)
+                if(leftDt !in IntegerDatatypes || rightDt !in IntegerDatatypes)
+                    checkResult.add(ExpressionError("logical operator can only be used on boolean operands", expr.right.position))
+                val constLeft = expr.left.constValue(namespace, heap)
+                val constRight = expr.right.constValue(namespace, heap)
+                if(constLeft!=null && constLeft.asIntegerValue !in 0..1 || constRight!=null && constRight.asIntegerValue !in 0..1)
+                    checkResult.add(ExpressionError("const literal argument of logical operator must be boolean (0 or 1)", expr.position))
+            }
+            "&", "|", "^" -> {
                 // only integer numeric operands accepted
                 val rightDt = expr.right.resultingDatatype(namespace, heap)
                 val leftDt = expr.left.resultingDatatype(namespace, heap)
                 if(leftDt !in IntegerDatatypes || rightDt !in IntegerDatatypes)
-                    checkResult.add(ExpressionError("logical or bitwise operator can only be used on integer operands", expr.right.position))
+                    checkResult.add(ExpressionError("bitwise operator can only be used on integer operands", expr.right.position))
             }
         }
 
@@ -716,12 +718,6 @@ private class AstChecker(private val namespace: INameScope,
     override fun process(typecast: TypecastExpression): IExpression {
         if(typecast.type in IterableDatatypes)
             checkResult.add(ExpressionError("cannot type cast to string or array type", typecast.position))
-        val funcTarget = (typecast.expression as? IFunctionCall)?.target?.targetStatement(namespace)
-        if(funcTarget is Subroutine &&
-                funcTarget.asmReturnvaluesRegisters.isNotEmpty() &&
-                funcTarget.asmReturnvaluesRegisters.all { it.stack!=true }) {
-            checkResult.add(ExpressionError("cannot type cast a call to an asmsub that returns value in register - use a variable to store it first", typecast.position))
-        }
         return super.process(typecast)
     }
 
@@ -890,9 +886,6 @@ private class AstChecker(private val namespace: INameScope,
                 if(index!=null && (index<0 || index>=arraysize))
                     checkResult.add(ExpressionError("array index out of bounds", arrayIndexedExpression.arrayspec.position))
             } else if(target.datatype in StringDatatypes) {
-                // check supported string tyep
-                if(target.datatype == DataType.STR_P || target.datatype==DataType.STR_PS)
-                    checkResult.add(ExpressionError("indexing pascal-strings is not supported, use regular str type instead", arrayIndexedExpression.arrayspec.position))
                 // check string lengths
                 val heapId = (target.value as LiteralValue).heapId!!
                 val stringLen = heap.get(heapId).str!!.length
@@ -1009,7 +1002,7 @@ private class AstChecker(private val namespace: INameScope,
                 if (number < -32768 || number > 32767)
                     return err("value '$number' out of range for word")
             }
-            DataType.STR, DataType.STR_P, DataType.STR_S, DataType.STR_PS -> {
+            DataType.STR, DataType.STR_S -> {
                 if(!value.isString)
                     return err("string value expected")
                 val str = value.strvalue(heap)
@@ -1135,8 +1128,6 @@ private class AstChecker(private val namespace: INameScope,
             DataType.FLOAT -> sourceDatatype in NumericDatatypes
             DataType.STR -> sourceDatatype==DataType.STR
             DataType.STR_S -> sourceDatatype==DataType.STR_S
-            DataType.STR_P -> sourceDatatype==DataType.STR_P
-            DataType.STR_PS -> sourceDatatype==DataType.STR_PS
             else -> checkResult.add(SyntaxError("cannot assign new value to variable of type $targetDatatype", position))
         }
 

compiler/src/prog8/ast/AstIdentifiersChecker.kt

@@ -1,50 +1,53 @@
 package prog8.ast
 
-import prog8.compiler.HeapValues
 import prog8.functions.BuiltinFunctions
 
 /**
  * Checks the validity of all identifiers (no conflicts)
- * Also builds a list of all (scoped) symbol definitions
  * Also makes sure that subroutine's parameters also become local variable decls in the subroutine's scope.
  * Finally, it also makes sure the datatype of all Var decls and sub Return values is set correctly.
  */
 
-fun Module.checkIdentifiers(heap: HeapValues): MutableMap<String, IStatement> {
-    val checker = AstIdentifiersChecker(heap)
+fun Module.checkIdentifiers(namespace: INameScope) {
+    val checker = AstIdentifiersChecker(namespace)
     this.process(checker)
 
-    // add any anonymous variables for heap values that are used, and replace literalvalue by identifierref
+    // add any anonymous variables for heap values that are used,
+    // and replace an iterable literalvalue by identifierref to new local variable
     for (variable in checker.anonymousVariablesFromHeap) {
         val scope = variable.first.definingScope()
         scope.statements.add(variable.second)
         val parent = variable.first.parent
         when {
             parent is Assignment && parent.value === variable.first -> {
-                val idref = IdentifierReference(listOf("auto_heap_value_${variable.first.heapId}"), variable.first.position)
+                val idref = IdentifierReference(listOf("$autoHeapValuePrefix${variable.first.heapId}"), variable.first.position)
                 idref.linkParents(parent)
                 parent.value = idref
             }
             parent is IFunctionCall -> {
                 val parameterPos = parent.arglist.indexOf(variable.first)
-                val idref = IdentifierReference(listOf("auto_heap_value_${variable.first.heapId}"), variable.first.position)
+                val idref = IdentifierReference(listOf("$autoHeapValuePrefix${variable.first.heapId}"), variable.first.position)
                 idref.linkParents(parent)
                 parent.arglist[parameterPos] = idref
             }
+            parent is ForLoop -> {
+                val idref = IdentifierReference(listOf("$autoHeapValuePrefix${variable.first.heapId}"), variable.first.position)
+                idref.linkParents(parent)
+                parent.iterable = idref
+            }
             else -> TODO("replace literalvalue by identifierref: $variable  (in $parent)")
         }
         variable.second.linkParents(scope as Node)
     }
 
     printErrors(checker.result(), name)
-    return checker.symbols
 }
 
 
-private class AstIdentifiersChecker(val heap: HeapValues) : IAstProcessor {
+private class AstIdentifiersChecker(private val namespace: INameScope) : IAstProcessor {
     private val checkResult: MutableList<AstException> = mutableListOf()
 
-    var symbols: MutableMap<String, IStatement> = mutableMapOf()
+    var blocks: MutableMap<String, Block> = mutableMapOf()
         private set
 
     fun result(): List<AstException> {
@@ -52,17 +55,16 @@ private class AstIdentifiersChecker(val heap: HeapValues) : IAstProcessor {
     }
 
     private fun nameError(name: String, position: Position, existing: IStatement) {
-        checkResult.add(NameError("name conflict '$name', first defined in ${existing.position.file} line ${existing.position.line}", position))
+        checkResult.add(NameError("name conflict '$name', also defined in ${existing.position.file} line ${existing.position.line}", position))
     }
 
     override fun process(block: Block): IStatement {
-        val scopedName = block.scopedname
-        val existing = symbols[scopedName]
-        if(existing!=null) {
+        val existing = blocks[block.name]
+        if(existing!=null)
             nameError(block.name, block.position, existing)
-        } else {
-            symbols[scopedName] = block
-        }
+        else
+            blocks[block.name] = block
+
         return super.process(block)
     }
 
@@ -85,13 +87,10 @@ private class AstIdentifiersChecker(val heap: HeapValues) : IAstProcessor {
             // the builtin functions can't be redefined
             checkResult.add(NameError("builtin function cannot be redefined", decl.position))
 
-        val scopedName = decl.scopedname
-        val existing = symbols[scopedName]
-        if(existing!=null) {
+        val existing = namespace.lookup(listOf(decl.name), decl)
+        if (existing != null && existing !== decl)
             nameError(decl.name, decl.position, existing)
-        } else {
-            symbols[scopedName] = decl
-        }
+
         return super.process(decl)
     }
 
@@ -103,13 +102,9 @@ private class AstIdentifiersChecker(val heap: HeapValues) : IAstProcessor {
             if (subroutine.parameters.any { it.name in BuiltinFunctions })
                 checkResult.add(NameError("builtin function name cannot be used as parameter", subroutine.position))
 
-            val scopedName = subroutine.scopedname
-            val existing = symbols[scopedName]
-            if (existing != null) {
+            val existing = namespace.lookup(listOf(subroutine.name), subroutine)
+            if (existing != null && existing !== subroutine)
                 nameError(subroutine.name, subroutine.position, existing)
-            } else {
-                symbols[scopedName] = subroutine
-            }
 
             // check that there are no local variables that redefine the subroutine's parameters
             val allDefinedNames = subroutine.allLabelsAndVariables()
@@ -146,13 +141,9 @@ private class AstIdentifiersChecker(val heap: HeapValues) : IAstProcessor {
             // the builtin functions can't be redefined
             checkResult.add(NameError("builtin function cannot be redefined", label.position))
         } else {
-            val scopedName = label.scopedname
-            val existing = symbols[scopedName]
-            if (existing != null) {
+            val existing = namespace.lookup(listOf(label.name), label)
+            if (existing != null && existing !== label)
                 nameError(label.name, label.position, existing)
-            } else {
-                symbols[scopedName] = label
-            }
         }
         return super.process(label)
     }
@@ -228,13 +219,16 @@ private class AstIdentifiersChecker(val heap: HeapValues) : IAstProcessor {
 
     internal val anonymousVariablesFromHeap = mutableSetOf<Pair<LiteralValue, VarDecl>>()
 
+
     override fun process(literalValue: LiteralValue): LiteralValue {
         if(literalValue.heapId!=null && literalValue.parent !is VarDecl) {
             // a literal value that's not declared as a variable, which refers to something on the heap.
             // we need to introduce an auto-generated variable for this to be able to refer to the value!
-            val variable = VarDecl(VarDeclType.VAR, literalValue.type, false, null, "auto_heap_value_${literalValue.heapId}", literalValue, literalValue.position)
+            val variable = VarDecl(VarDeclType.VAR, literalValue.type, false, null, "$autoHeapValuePrefix${literalValue.heapId}", literalValue, literalValue.position)
             anonymousVariablesFromHeap.add(Pair(literalValue, variable))
         }
         return super.process(literalValue)
     }
 }
+
+private const val autoHeapValuePrefix = "auto_heap_value_"

compiler/src/prog8/ast/StmtReorderer.kt

@@ -233,7 +233,7 @@ private class VarInitValueCreator: IAstProcessor {
             val scope = decl.definingScope()
             if(scope !in vardeclsToAdd)
                 vardeclsToAdd[scope] = mutableListOf()
-            vardeclsToAdd[scope]!!.add(decl.asDefaultValueDecl(null))
+            vardeclsToAdd.getValue(scope).add(decl.asDefaultValueDecl(null))
             val declvalue = decl.value!!
             val value =
                     if(declvalue is LiteralValue) {

compiler/src/prog8/compiler/Compiler.kt

@@ -92,17 +92,12 @@ class HeapValues {
 
     fun update(heapId: Int, str: String) {
         val oldVal = heap[heapId] ?: throw IllegalArgumentException("heapId not found in heap")
-        when(oldVal.type){
-            DataType.STR,
-            DataType.STR_P,
-            DataType.STR_S,
-            DataType.STR_PS -> {
-                if(oldVal.str!!.length!=str.length)
-                    throw IllegalArgumentException("heap string length mismatch")
-                heap[heapId] = oldVal.copy(str=str)
-            }
-            else-> throw IllegalArgumentException("heap data type mismatch")
+        if(oldVal.type in StringDatatypes) {
+            if (oldVal.str!!.length != str.length)
+                throw IllegalArgumentException("heap string length mismatch")
+            heap[heapId] = oldVal.copy(str = str)
         }
+        else throw IllegalArgumentException("heap data type mismatch")
     }
 
     fun update(heapId: Int, heapval: HeapValue) {
@@ -162,9 +157,8 @@ internal class Compiler(private val rootModule: Module,
     }
 
     override fun process(block: Block): IStatement {
-        prog.newBlock(block.scopedname, block.name, block.address, block.options())
+        prog.newBlock(block.name, block.address, block.options())
         processVariables(block)
-        prog.label("block."+block.scopedname, false)
         prog.line(block.position)
         translate(block.statements)
         return super.process(block)
@@ -293,7 +287,6 @@ internal class Compiler(private val rootModule: Module,
             DataType.ARRAY_UW, DataType.ARRAY_W -> Opcode.READ_INDEXED_VAR_WORD
             DataType.ARRAY_F -> Opcode.READ_INDEXED_VAR_FLOAT
             DataType.STR, DataType.STR_S -> Opcode.READ_INDEXED_VAR_BYTE
-            DataType.STR_P, DataType.STR_PS -> throw CompilerException("cannot index on type $dt - use regular 0-terminated str type")
             else -> throw CompilerException("invalid dt for indexed access $dt")
         }
     }
@@ -304,7 +297,6 @@ internal class Compiler(private val rootModule: Module,
             DataType.ARRAY_UW, DataType.ARRAY_W -> Opcode.WRITE_INDEXED_VAR_WORD
             DataType.ARRAY_F -> Opcode.WRITE_INDEXED_VAR_FLOAT
             DataType.STR, DataType.STR_S -> Opcode.WRITE_INDEXED_VAR_BYTE
-            DataType.STR_P, DataType.STR_PS -> TODO("cannot index on type $dt - use regular str type")
             else -> throw CompilerException("invalid dt for indexed access $dt")
         }
     }
@@ -384,7 +376,16 @@ internal class Compiler(private val rootModule: Module,
     }
 
     private fun translate(stmt: InlineAssembly) {
-        prog.instr(Opcode.INLINE_ASSEMBLY, callLabel = stmt.assembly)
+        // If the inline assembly is the only statement inside a subroutine (except vardecls),
+        // we can use the name of that subroutine to identify it.
+        // The compiler could then convert it to a special system call
+        val sub = stmt.parent as? Subroutine
+        val scopename =
+                if(sub!=null && sub.statements.filter{it !is VarDecl}.size==1)
+                    sub.scopedname
+                else
+                    null
+        prog.instr(Opcode.INLINE_ASSEMBLY, callLabel=scopename, callLabel2 = stmt.assembly)
     }
 
     private fun translate(stmt: Continue) {
@@ -459,8 +460,8 @@ internal class Compiler(private val rootModule: Module,
             }
         } else {
             // regular if..else branching
-            val labelElse = makeLabel("else")
-            val labelEnd = makeLabel("end")
+            val labelElse = makeLabel(branch, "else")
+            val labelEnd = makeLabel(branch, "end")
             val opcode = branchOpcode(branch, true)
             if (branch.elsepart.isEmpty()) {
                 prog.instr(opcode, callLabel = labelEnd)
@@ -478,9 +479,9 @@ internal class Compiler(private val rootModule: Module,
         }
     }
 
-    private fun makeLabel(postfix: String): String {
+    private fun makeLabel(scopeStmt: IStatement, postfix: String): String {
         generatedLabelSequenceNumber++
-        return "_prog8stmt_${generatedLabelSequenceNumber}_$postfix"
+        return "${scopeStmt.makeScopedName("")}.<s-$generatedLabelSequenceNumber-$postfix>"
     }
 
     private fun translate(stmt: IfStatement) {
@@ -526,13 +527,13 @@ internal class Compiler(private val rootModule: Module,
             in WordDatatypes -> Opcode.JZW
             else -> throw CompilerException("invalid condition datatype (expected byte or word) $stmt")
         }
-        val labelEnd = makeLabel("end")
+        val labelEnd = makeLabel(stmt, "end")
         if(stmt.elsepart.isEmpty()) {
             prog.instr(conditionJumpOpcode, callLabel = labelEnd)
             translate(stmt.truepart)
             prog.label(labelEnd)
         } else {
-            val labelElse = makeLabel("else")
+            val labelElse = makeLabel(stmt, "else")
             prog.instr(conditionJumpOpcode, callLabel = labelElse)
             translate(stmt.truepart)
             prog.instr(Opcode.JUMP, callLabel = labelEnd)
@@ -642,10 +643,8 @@ internal class Compiler(private val rootModule: Module,
                     val funcname = expr.target.nameInSource[0]
                     translateBuiltinFunctionCall(funcname, expr.arglist)
                 } else {
-                    when(target) {
-                        is Subroutine -> translateSubroutineCall(target, expr.arglist, expr.position)
-                        else -> TODO("non-builtin-function call to $target")
-                    }
+                    if (target is Subroutine) translateSubroutineCall(target, expr.arglist, expr.position)
+                    else TODO("non-builtin-function call to $target")
                 }
             }
             is IdentifierReference -> translate(expr)
@@ -668,7 +667,7 @@ internal class Compiler(private val rootModule: Module,
                     in ArrayDatatypes -> {
                         if(lv.heapId==null)
                             throw CompilerException("array should have been moved into heap  ${lv.position}")
-                        TODO("push address of array with PUSH_WORD")
+                        TODO("push address of array with PUSH_ADDR_HEAPVAR")
                     }
                     else -> throw CompilerException("weird datatype")
                 }
@@ -805,10 +804,7 @@ internal class Compiler(private val rootModule: Module,
                 // 1 argument, type determines the exact syscall to use
                 val arg=args.single()
                 when (arg.resultingDatatype(namespace, heap)) {
-                    DataType.STR -> createSyscall("${funcname}_str")
-                    DataType.STR_P -> createSyscall("${funcname}_strp")
-                    DataType.STR_S -> createSyscall("${funcname}_str")
-                    DataType.STR_PS -> createSyscall("${funcname}_strp")
+                    DataType.STR, DataType.STR_S -> createSyscall("${funcname}_str")
                     else -> throw CompilerException("wrong datatype for len()")
                 }
             }
@@ -1013,12 +1009,20 @@ internal class Compiler(private val rootModule: Module,
             // the result values of the asm-subroutine that are returned in registers, have to be pushed on the stack
             // (in reversed order)   otherwise the asm-subroutine can't be used in expressions.
             for(rv in subroutine.asmReturnvaluesRegisters.reversed()) {
-                if(rv.statusflag!=null)
-                    TODO("not yet supported: return values in cpu status flag $rv  $subroutine")
-                when(rv.registerOrPair) {
-                    A,X,Y -> prog.instr(Opcode.PUSH_VAR_BYTE, callLabel = rv.registerOrPair.name)
-                    AX, AY, XY -> prog.instr(Opcode.PUSH_VAR_WORD, callLabel = rv.registerOrPair.name)
-                    null -> {}
+                if(rv.statusflag!=null) {
+                    if (rv.statusflag == Statusflag.Pc) {
+                        prog.instr(Opcode.CARRY_TO_A)
+                        prog.instr(Opcode.PUSH_VAR_BYTE, callLabel = Register.A.name)
+                    }
+                    else TODO("return value in cpu status flag only supports Carry, not $rv  ($subroutine)")
+                } else {
+                    when (rv.registerOrPair) {
+                        A, X, Y -> prog.instr(Opcode.PUSH_VAR_BYTE, callLabel = rv.registerOrPair.name)
+                        AX -> prog.instr(Opcode.PUSH_REGAX_WORD)
+                        AY -> prog.instr(Opcode.PUSH_REGAY_WORD)
+                        XY -> prog.instr(Opcode.PUSH_REGXY_WORD)
+                        null -> {}
+                    }
                 }
             }
         }
@@ -1585,74 +1589,17 @@ internal class Compiler(private val rootModule: Module,
     private fun translateMultiReturnAssignment(stmt: Assignment) {
         val targetStmt = (stmt.value as? FunctionCall)?.target?.targetStatement(namespace)
         if(targetStmt is Subroutine && targetStmt.isAsmSubroutine) {
-            // TODO check correctness of multi-return values (they should be on the stack rather than directly assigned!)
-            // we're dealing with the one case where multiple assignment targets are allowed: a call to an asmsub with multiple return values
-            // for now, we only support multiple return values as long as they're returned in registers as well.
-            if(targetStmt.asmReturnvaluesRegisters.isEmpty())
-                throw CompilerException("we only support multiple return values / assignment when the asmsub returns values in registers")
-            // if the result registers are not assigned in the exact same registers, or in variables, we need some code
-            if(stmt.targets.all{it.register!=null}) {
-                val resultRegisters = registerSet(targetStmt.asmReturnvaluesRegisters)
-                if(stmt.targets.size!=resultRegisters.size)
-                    throw CompilerException("asmsub number of return values doesn't match number of assignment targets ${stmt.position}")
-                val targetRegs = stmt.targets.filter {it.register!=null}.map{it.register}.toSet()
-                if(resultRegisters!=targetRegs)
-                    throw CompilerException("asmsub return registers don't match assignment target registers ${stmt.position}")
-                // output is in registers already, no need to emit any asm code
-            } else {
-                // output is in registers but has to be stored somewhere
-                for(result in targetStmt.asmReturnvaluesRegisters.zip(stmt.targets))
-                    storeRegisterIntoTarget(result.first, result.second, stmt)
+            // this is the only case where multiple assignment targets are allowed: a call to an asmsub with multiple return values
+            // the return values are already on the stack (the subroutine call puts them there)
+            if(stmt.targets.size!=targetStmt.asmReturnvaluesRegisters.size)
+                throw CompilerException("asmsub number of return values doesn't match number of assignment targets ${stmt.position}")
+            for(target in stmt.targets) {
+                val dt = target.determineDatatype(namespace, heap, stmt)
+                popValueIntoTarget(target, dt!!)
             }
         } else throw CompilerException("can only use multiple assignment targets on an asmsub call")
     }
 
-    private fun storeRegisterIntoTarget(registerOrStatus: RegisterOrStatusflag, target: AssignTarget, parent: IStatement) {
-        if(registerOrStatus.statusflag!=null)
-            return
-        when(registerOrStatus.registerOrPair){
-            A -> {
-                val assignment = Assignment(listOf(target), null, RegisterExpr(Register.A, target.position), target.position)
-                assignment.linkParents(parent)
-                translate(assignment)
-            }
-            X -> {
-                val assignment = Assignment(listOf(target), null, RegisterExpr(Register.X, target.position), target.position)
-                assignment.linkParents(parent)
-                translate(assignment)
-            }
-            Y -> {
-                val assignment = Assignment(listOf(target), null, RegisterExpr(Register.Y, target.position), target.position)
-                assignment.linkParents(parent)
-                translate(assignment)
-            }
-            AX -> {
-                // deal with register pair AX:  target = A + X*256
-                val targetDt = target.determineDatatype(namespace, heap, parent)
-                if(targetDt!=DataType.UWORD && targetDt!=DataType.WORD)
-                    throw CompilerException("invalid target datatype for registerpair $targetDt")
-                prog.instr(Opcode.PUSH_REGAX_WORD)
-                popValueIntoTarget(target, targetDt)
-            }
-            AY -> {
-                // deal with register pair AY:  target = A + Y*256
-                val targetDt = target.determineDatatype(namespace, heap, parent)
-                if(targetDt!=DataType.UWORD && targetDt!=DataType.WORD)
-                    throw CompilerException("invalid target datatype for registerpair $targetDt")
-                prog.instr(Opcode.PUSH_REGAY_WORD)
-                popValueIntoTarget(target, targetDt)
-            }
-            XY -> {
-                // deal with register pair XY:  target = X + Y*256
-                val targetDt = target.determineDatatype(namespace, heap, parent)
-                if(targetDt!=DataType.UWORD && targetDt!=DataType.WORD)
-                    throw CompilerException("invalid target datatype for registerpair $targetDt")
-                prog.instr(Opcode.PUSH_REGXY_WORD)
-                popValueIntoTarget(target, targetDt)
-            }
-        }
-    }
-
     private fun popValueIntoTarget(assignTarget: AssignTarget, datatype: DataType) {
         when {
             assignTarget.identifier != null -> {
@@ -1773,7 +1720,7 @@ internal class Compiler(private val rootModule: Module,
     }
 
     private fun translateForOverIterableVar(loop: ForLoop, loopvarDt: DataType, iterableValue: LiteralValue) {
-        if(loopvarDt==DataType.UBYTE && iterableValue.type !in setOf(DataType.STR, DataType.STR_P, DataType.STR_S, DataType.STR_PS, DataType.ARRAY_UB))
+        if(loopvarDt==DataType.UBYTE && iterableValue.type !in setOf(DataType.STR, DataType.STR_S, DataType.ARRAY_UB))
             throw CompilerException("loop variable type doesn't match iterableValue type")
         else if(loopvarDt==DataType.UWORD && iterableValue.type != DataType.ARRAY_UW)
             throw CompilerException("loop variable type doesn't match iterableValue type")
@@ -1783,7 +1730,6 @@ internal class Compiler(private val rootModule: Module,
         val numElements: Int
         when(iterableValue.type) {
             !in IterableDatatypes -> throw CompilerException("non-iterableValue type")
-            DataType.STR_P, DataType.STR_PS -> throw CompilerException("can't iterate string type ${iterableValue.type}")
             DataType.STR, DataType.STR_S -> {
                 numElements = iterableValue.strvalue(heap).length
                 if(numElements>255) throw CompilerException("string length > 255")
@@ -1817,9 +1763,9 @@ internal class Compiler(private val rootModule: Module,
          * break:
          *      nop
          */
-        val loopLabel = makeLabel("loop")
-        val continueLabel = makeLabel("continue")
-        val breakLabel = makeLabel("break")
+        val loopLabel = makeLabel(loop, "loop")
+        val continueLabel = makeLabel(loop, "continue")
+        val breakLabel = makeLabel(loop, "break")
         val indexVarType = if (numElements <= 255) DataType.UBYTE else DataType.UWORD
         val indexVar = loop.body.getLabelOrVariable(ForLoop.iteratorLoopcounterVarname) as VarDecl
 
@@ -1878,9 +1824,9 @@ internal class Compiler(private val rootModule: Module,
          * break:
          *      nop
          */
-        val loopLabel = makeLabel("loop")
-        val continueLabel = makeLabel("continue")
-        val breakLabel = makeLabel("break")
+        val loopLabel = makeLabel(body, "loop")
+        val continueLabel = makeLabel(body, "continue")
+        val breakLabel = makeLabel(body, "break")
 
         continueStmtLabelStack.push(continueLabel)
         breakStmtLabelStack.push(breakLabel)
@@ -1983,9 +1929,9 @@ internal class Compiler(private val rootModule: Module,
         startAssignment.linkParents(body)
         translate(startAssignment)
 
-        val loopLabel = makeLabel("loop")
-        val continueLabel = makeLabel("continue")
-        val breakLabel = makeLabel("break")
+        val loopLabel = makeLabel(body, "loop")
+        val continueLabel = makeLabel(body, "continue")
+        val breakLabel = makeLabel(body, "break")
         val literalStepValue = (range.step as? LiteralValue)?.asNumericValue?.toInt()
 
         continueStmtLabelStack.push(continueLabel)
@@ -2087,9 +2033,9 @@ internal class Compiler(private val rootModule: Module,
          *  break:
          *      nop
          */
-        val loopLabel = makeLabel("loop")
-        val breakLabel = makeLabel("break")
-        val continueLabel = makeLabel("continue")
+        val loopLabel = makeLabel(stmt, "loop")
+        val breakLabel = makeLabel(stmt, "break")
+        val continueLabel = makeLabel(stmt, "continue")
         prog.line(stmt.position)
         breakStmtLabelStack.push(breakLabel)
         continueStmtLabelStack.push(continueLabel)
@@ -2125,9 +2071,9 @@ internal class Compiler(private val rootModule: Module,
          *  break:
          *      nop
          */
-        val loopLabel = makeLabel("loop")
-        val continueLabel = makeLabel("continue")
-        val breakLabel = makeLabel("break")
+        val loopLabel = makeLabel(stmt, "loop")
+        val continueLabel = makeLabel(stmt, "continue")
+        val breakLabel = makeLabel(stmt, "break")
         prog.line(stmt.position)
         breakStmtLabelStack.push(breakLabel)
         continueStmtLabelStack.push(continueLabel)
@@ -2148,13 +2094,6 @@ internal class Compiler(private val rootModule: Module,
     }
 
     private fun translate(expr: TypecastExpression) {
-        val funcTarget = (expr.expression as? IFunctionCall)?.target?.targetStatement(namespace)
-        if(funcTarget is Subroutine &&
-                funcTarget.asmReturnvaluesRegisters.isNotEmpty() &&
-                funcTarget.asmReturnvaluesRegisters.all { it.stack!=true }) {
-            throw CompilerException("cannot type cast a call to an asmsub that returns value in register - use a variable to store it first")
-        }
-
         translate(expr.expression)
         val sourceDt = expr.expression.resultingDatatype(namespace, heap) ?: throw CompilerException("don't know what type to cast")
         if(sourceDt==expr.type)
@@ -2244,7 +2183,7 @@ internal class Compiler(private val rootModule: Module,
                         File(filename).readText()
                 }
 
-        prog.instr(Opcode.INLINE_ASSEMBLY, callLabel=scopeprefix+sourcecode+scopeprefixEnd)
+        prog.instr(Opcode.INLINE_ASSEMBLY, callLabel=null, callLabel2=scopeprefix+sourcecode+scopeprefixEnd)
     }
 
     private fun translateAsmBinary(args: List<DirectiveArg>) {

compiler/src/prog8/compiler/intermediate/Instruction.kt

@@ -8,15 +8,21 @@ open class Instruction(val opcode: Opcode,
                        val callLabel: String? = null,
                        val callLabel2: String? = null)
 {
-    lateinit var next: Instruction
-    var nextAlt: Instruction? = null
+    var branchAddress: Int? = null
 
     override fun toString(): String {
         val argStr = arg?.toString() ?: ""
         val result =
                 when {
                     opcode==Opcode.LINE -> "_line  $callLabel"
-                    opcode==Opcode.INLINE_ASSEMBLY -> "inline_assembly"
+                    opcode==Opcode.INLINE_ASSEMBLY -> {
+                        // inline assembly is not written out (it can't be processed as intermediate language)
+                        // instead, it is converted into a system call that can be intercepted by the vm
+                        if(callLabel!=null)
+                            "syscall  SYSASM.$callLabel\n    return"
+                        else
+                            "inline_assembly"
+                    }
                     opcode==Opcode.SYSCALL -> {
                         val syscall = Syscall.values().find { it.callNr==arg!!.numericValue() }
                         "syscall  $syscall"

compiler/src/prog8/compiler/intermediate/IntermediateProgram.kt

@@ -11,8 +11,7 @@ import java.nio.file.Path
 
 class IntermediateProgram(val name: String, var loadAddress: Int, val heap: HeapValues, val importedFrom: Path) {
 
-    class ProgramBlock(val scopedname: String,
-                       val shortname: String,
+    class ProgramBlock(val name: String,
                        var address: Int?,
                        val instructions: MutableList<Instruction> = mutableListOf(),
                        val variables: MutableMap<String, Value> = mutableMapOf(),
@@ -447,8 +446,8 @@ class IntermediateProgram(val name: String, var loadAddress: Int, val heap: Heap
         currentBlock.memoryPointers[name] = Pair(address, datatype)
     }
 
-    fun newBlock(scopedname: String, shortname: String, address: Int?, options: Set<String>) {
-        currentBlock = ProgramBlock(scopedname, shortname, address, force_output="force_output" in options)
+    fun newBlock(name: String, address: Int?, options: Set<String>) {
+        currentBlock = ProgramBlock(name, address, force_output="force_output" in options)
         blocks.add(currentBlock)
     }
 
@@ -472,7 +471,7 @@ class IntermediateProgram(val name: String, var loadAddress: Int, val heap: Heap
         }
         out.println("%end_heap")
         for(blk in blocks) {
-            out.println("\n%block ${blk.scopedname} ${blk.address?.toString(16) ?: ""}")
+            out.println("\n%block ${blk.name} ${blk.address?.toString(16) ?: ""}")
 
             out.println("%variables")
             for(variable in blk.variables) {

compiler/src/prog8/compiler/intermediate/Opcode.kt

@@ -244,7 +244,6 @@ enum class Opcode {
     JZW,         // branch if value is zero (word)
     JNZW,        // branch if value is not zero (word)
 
-
     // subroutines
     CALL,
     RETURN,
@@ -257,6 +256,7 @@ enum class Opcode {
     CLC,        // clear carry status flag  NOTE: is mostly fake, carry flag is not affected by any numeric operations
     SEI,        // set irq-disable status flag
     CLI,        // clear irq-disable status flag
+    CARRY_TO_A, // load var/register A with carry status bit
     RSAVE,      // save all internal registers and status flags
     RSAVEX,     // save just X (the evaluation stack pointer)
     RRESTORE,   // restore all internal registers and status flags

compiler/src/prog8/compiler/target/c64/AsmGen.kt

@@ -23,10 +23,7 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
     private var breakpointCounter = 0
 
     init {
-        // Because 64tass understands scoped names via .proc / .block,
-        // we'll strip the block prefix from all scoped names in the program.
-        // Also, convert invalid label names (such as "<<<anonymous-1>>>") to something that's allowed.
-        // Also have to do that for the variablesMarkedForZeropage!
+        // Convert invalid label names (such as "<anon-1>") to something that's allowed.
         val newblocks = mutableListOf<IntermediateProgram.ProgramBlock>()
         for(block in program.blocks) {
             val newvars = block.variables.map { symname(it.key, block) to it.value }.toMap().toMutableMap()
@@ -42,14 +39,13 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
                             callLabel2 = if (it.callLabel2 != null) symname(it.callLabel2, block) else null)
                 }
             }.toMutableList()
-            val newConstants = block.memoryPointers.map { symname(it.key, block) to it.value }.toMap().toMutableMap()
+            val newMempointers = block.memoryPointers.map { symname(it.key, block) to it.value }.toMap().toMutableMap()
             val newblock = IntermediateProgram.ProgramBlock(
-                    block.scopedname,
-                    block.shortname,
+                    block.name,
                     block.address,
                     newinstructions,
                     newvars,
-                    newConstants,
+                    newMempointers,
                     newlabels,
                     force_output = block.force_output)
             newblock.variablesMarkedForZeropage.clear()
@@ -106,29 +102,20 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
     }
 
 
+    // convert a fully scoped name (defined in the given block) to a valid assembly symbol name
     private fun symname(scoped: String, block: IntermediateProgram.ProgramBlock?): String {
         if(' ' in scoped)
             return scoped
         val blockLocal: Boolean
-        var name = when {
-            block==null -> {
-                blockLocal=true
-                scoped
-            }
-            scoped.startsWith("${block.shortname}.") -> {
-                blockLocal = true
-                scoped.substring(block.shortname.length+1)
-            }
-            scoped.startsWith("block.") -> {
-                blockLocal = false
-                scoped
-            }
-            else -> {
-                blockLocal = false
-                scoped
-            }
+        var name = if (block!=null && scoped.startsWith("${block.name}.")) {
+            blockLocal = true
+            scoped.substring(block.name.length+1)
         }
-        name = name.replace("<<<", "prog8_").replace(">>>", "")
+        else {
+            blockLocal = false
+            scoped
+        }
+        name = name.replace("<", "prog8_").replace(">", "")     // take care of the autogenerated invalid (anon) label names
         if(name=="-")
             return "-"
         if(blockLocal)
@@ -199,7 +186,7 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
         for(block in program.blocks) {
             val initVarsLabel = block.instructions.firstOrNull { it is LabelInstr && it.name==initvarsSubName } as? LabelInstr
             if(initVarsLabel!=null)
-                out("  jsr  ${block.scopedname}.${initVarsLabel.name}")
+                out("  jsr  ${block.name}.${initVarsLabel.name}")
         }
         out("  clc")
         when(zeropage.exitProgramStrategy) {
@@ -222,9 +209,9 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
 
     private fun block2asm(blk: IntermediateProgram.ProgramBlock) {
         block = blk
-        out("\n; ---- block: '${block.shortname}' ----")
+        out("\n; ---- block: '${block.name}' ----")
         if(!blk.force_output)
-            out("${block.shortname}\t.proc\n")
+            out("${block.name}\t.proc\n")
         if(block.address!=null) {
             out(".cerror * > ${block.address?.toHex()}, 'block address overlaps by ', *-${block.address?.toHex()},' bytes'")
             out("* = ${block.address?.toHex()}")
@@ -232,14 +219,14 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
 
         // deal with zeropage variables
         for(variable in blk.variables) {
-            val sym = symname(blk.scopedname+"."+variable.key, null)
+            val sym = symname(blk.name+"."+variable.key, null)
             val zpVar = program.allocatedZeropageVariables[sym]
             if(zpVar==null) {
                 // This var is not on the ZP yet. Attempt to move it there (if it's not a float, those take up too much space)
                 if(variable.value.type in zeropage.allowedDatatypes && variable.value.type != DataType.FLOAT) {
                     try {
                         val address = zeropage.allocate(sym, variable.value.type, null)
-                        out("${variable.key} = $address\t; zp ${variable.value.type}")
+                        out("${variable.key} = $address\t; auto zp ${variable.value.type}")
                         // make sure we add the var to the set of zpvars for this block
                         blk.variablesMarkedForZeropage.add(variable.key)
                         program.allocatedZeropageVariables[sym] = Pair(address, variable.value.type)
@@ -293,13 +280,10 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
                 DataType.UWORD -> out("${v.first}\t.word  0")
                 DataType.WORD -> out("${v.first}\t.sint  0")
                 DataType.FLOAT -> out("${v.first}\t.byte  0,0,0,0,0  ; float")
-                DataType.STR,
-                DataType.STR_P,
-                DataType.STR_S,
-                DataType.STR_PS -> {
+                DataType.STR, DataType.STR_S -> {
                     val rawStr = heap.get(v.second.heapId).str!!
                     val bytes = encodeStr(rawStr, v.second.type).map { "$" + it.toString(16).padStart(2, '0') }
-                    out("${v.first}\t; ${v.second.type} \"${escape(rawStr)}\"")
+                    out("${v.first}\t; ${v.second.type} \"${escape(rawStr).replace("\u0000", "<NULL>")}\"")
                     for (chunk in bytes.chunked(16))
                         out("  .byte  " + chunk.joinToString())
                 }
@@ -360,24 +344,14 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
     }
 
     private fun encodeStr(str: String, dt: DataType): List<Short> {
-        when(dt) {
+        return when(dt) {
             DataType.STR -> {
                 val bytes = Petscii.encodePetscii(str, true)
-                return bytes.plus(0)
-            }
-            DataType.STR_P -> {
-                val result = listOf(str.length.toShort())
-                val bytes = Petscii.encodePetscii(str, true)
-                return result.plus(bytes)
+                bytes.plus(0)
             }
             DataType.STR_S -> {
                 val bytes = Petscii.encodeScreencode(str, true)
-                return bytes.plus(0)
-            }
-            DataType.STR_PS -> {
-                val result = listOf(str.length.toShort())
-                val bytes = Petscii.encodeScreencode(str, true)
-                return result.plus(bytes)
+                bytes.plus(0)
             }
             else -> throw AssemblyError("invalid str type")
         }
@@ -440,12 +414,9 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
     private fun simpleInstr2Asm(ins: Instruction): String? {
         // a label 'instruction' is simply translated into a asm label
         if(ins is LabelInstr) {
-            if(ins.name.startsWith("block."))
-                return ""
-
             val labelresult =
-                    if(ins.name.startsWith("${block.shortname}."))
-                        ins.name.substring(block.shortname.length+1)
+                    if(ins.name.startsWith("${block.name}."))
+                        ins.name.substring(block.name.length+1)
                     else
                         ins.name
             return if(ins.asmProc) labelresult+"\t\t.proc" else labelresult
@@ -462,6 +433,7 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
             Opcode.CLC -> " clc"
             Opcode.SEI -> " sei"
             Opcode.CLI -> " cli"
+            Opcode.CARRY_TO_A -> " lda  #0 |  adc  #0"
             Opcode.JUMP -> {
                 if(ins.callLabel!=null)
                     " jmp  ${ins.callLabel}"
@@ -489,7 +461,7 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
             Opcode.DISCARD_BYTE -> " inx"
             Opcode.DISCARD_WORD -> " inx"
             Opcode.DISCARD_FLOAT -> " inx |  inx |  inx"
-            Opcode.INLINE_ASSEMBLY ->  "@inline@" + (ins.callLabel ?: "")      // All of the inline assembly is stored in the calllabel property. the '@inline@' is a special marker to process it.
+            Opcode.INLINE_ASSEMBLY ->  "@inline@" + (ins.callLabel2 ?: "")      // All of the inline assembly is stored in the calllabel2 property. the '@inline@' is a special marker to process it.
             Opcode.SYSCALL -> {
                 if (ins.arg!!.numericValue() in syscallsForStackVm.map { it.callNr })
                     throw CompilerException("cannot translate vm syscalls to real assembly calls - use *real* subroutine calls instead. Syscall ${ins.arg.numericValue()}")
@@ -1268,9 +1240,6 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
             Opcode.ROR2_WORD -> {
                 AsmFragment(" lsr  $variable+1 |  ror  $variable |  bcc  + |  lda  $variable+1 |  ora  #\$80 |  sta  $variable+1 |+", 30)
             }
-//            Opcode.SYSCALL -> {
-//                TODO("optimize SYSCALL $ins in-place on variable $variable")
-//            }
             else -> null
         }
     }

compiler/src/prog8/compiler/target/c64/Petscii.kt

@@ -1055,11 +1055,12 @@ class Petscii {
             val lookup = if(lowercase) encodingPetsciiLowercase else encodingPetsciiUppercase
             return text.map {
                 val petscii = lookup[it]
-                if(petscii==null) {
-                    val case = if(lowercase) "lower" else "upper"
+                petscii?.toShort() ?: if(it=='\u0000')
+                    0.toShort()
+                else {
+                    val case = if (lowercase) "lower" else "upper"
                     throw CharConversionException("no ${case}case Petscii character for '$it'")
                 }
-                petscii.toShort()
             }
         }
 
@@ -1072,11 +1073,12 @@ class Petscii {
             val lookup = if(lowercase) encodingScreencodeLowercase else encodingScreencodeUppercase
             return text.map{
                 val screencode = lookup[it]
-                if(screencode==null) {
-                    val case = if(lowercase) "lower" else "upper"
+                screencode?.toShort() ?: if(it=='\u0000')
+                    0.toShort()
+                else {
+                    val case = if (lowercase) "lower" else "upper"
                     throw CharConversionException("no ${case}Screencode character for '$it'")
                 }
-                screencode.toShort()
             }
         }
 

compiler/src/prog8/functions/BuiltinFunctions.kt

@@ -46,7 +46,7 @@ val BuiltinFunctions = mapOf(
     "atan"        to FunctionSignature(true, listOf(BuiltinFunctionParam("rads", setOf(DataType.FLOAT))), DataType.FLOAT) { a, p, n, h -> oneDoubleArg(a, p, n, h, Math::atan) },
     "ln"          to FunctionSignature(true, listOf(BuiltinFunctionParam("value", setOf(DataType.FLOAT))), DataType.FLOAT) { a, p, n, h -> oneDoubleArg(a, p, n, h, Math::log) },
     "log2"        to FunctionSignature(true, listOf(BuiltinFunctionParam("value", setOf(DataType.FLOAT))), DataType.FLOAT) { a, p, n, h -> oneDoubleArg(a, p, n, h, ::log2) },
-        // TODO: sqrt() should have integer versions too
+    "sqrt16"      to FunctionSignature(true, listOf(BuiltinFunctionParam("value", setOf(DataType.UWORD))), DataType.UBYTE) { a, p, n, h -> oneIntArgOutputInt(a, p, n, h) { Math.sqrt(it.toDouble()).toInt() } },
     "sqrt"        to FunctionSignature(true, listOf(BuiltinFunctionParam("value", setOf(DataType.FLOAT))), DataType.FLOAT) { a, p, n, h -> oneDoubleArg(a, p, n, h, Math::sqrt) },
     "rad"         to FunctionSignature(true, listOf(BuiltinFunctionParam("value", setOf(DataType.FLOAT))), DataType.FLOAT) { a, p, n, h -> oneDoubleArg(a, p, n, h, Math::toRadians) },
     "deg"         to FunctionSignature(true, listOf(BuiltinFunctionParam("value", setOf(DataType.FLOAT))), DataType.FLOAT) { a, p, n, h -> oneDoubleArg(a, p, n, h, Math::toDegrees) },
@@ -84,6 +84,7 @@ val BuiltinFunctions = mapOf(
                                                         BuiltinFunctionParam("address", IterableDatatypes + setOf(DataType.UWORD)),
                                                         BuiltinFunctionParam("numwords", setOf(DataType.UWORD)),
                                                         BuiltinFunctionParam("wordvalue", setOf(DataType.UWORD, DataType.WORD))), null),
+    "strlen"      to FunctionSignature(true, listOf(BuiltinFunctionParam("string", StringDatatypes)), DataType.UBYTE, ::builtinStrlen),
     "vm_write_memchr"  to FunctionSignature(false, listOf(BuiltinFunctionParam("address", setOf(DataType.UWORD))), null),
     "vm_write_memstr"  to FunctionSignature(false, listOf(BuiltinFunctionParam("address", setOf(DataType.UWORD))), null),
     "vm_write_num"     to FunctionSignature(false, listOf(BuiltinFunctionParam("number", NumericDatatypes)), null),
@@ -302,6 +303,20 @@ private fun builtinAvg(args: List<IExpression>, position: Position, namespace:IN
     return numericLiteral(result, args[0].position)
 }
 
+private fun builtinStrlen(args: List<IExpression>, position: Position, namespace:INameScope, heap: HeapValues): LiteralValue {
+    if (args.size != 1)
+        throw SyntaxError("strlen requires one argument", position)
+    val argument = args[0].constValue(namespace, heap) ?: throw NotConstArgumentException()
+    if(argument.type !in StringDatatypes)
+        throw SyntaxError("strlen must have string argument", position)
+    val string = argument.strvalue(heap)
+    val zeroIdx = string.indexOf('\u0000')
+    return if(zeroIdx>=0)
+        LiteralValue.optimalInteger(zeroIdx, position=position)
+    else
+        LiteralValue.optimalInteger(string.length, position=position)
+}
+
 private fun builtinLen(args: List<IExpression>, position: Position, namespace:INameScope, heap: HeapValues): LiteralValue {
     // note: in some cases the length is > 255 and then we have to return a UWORD type instead of a UBYTE.
     if(args.size!=1)

compiler/src/prog8/optimizing/ConstantFolding.kt

@@ -534,7 +534,7 @@ class ConstantFolding(private val namespace: INameScope, private val heap: HeapV
             if(literalValue.strvalue(heap).length !in 1..255)
                 addError(ExpressionError("string literal length must be between 1 and 255", literalValue.position))
             else {
-                val heapId = heap.add(literalValue.type, literalValue.strvalue(heap))     // TODO: we don't know the actual string type yet, STR != STR_P etc...
+                val heapId = heap.add(literalValue.type, literalValue.strvalue(heap))     // TODO: we don't know the actual string type yet, STR != STR_S etc...
                 val newValue = LiteralValue(literalValue.type, heapId = heapId, position = literalValue.position)
                 return super.process(newValue)
             }

compiler/src/prog8/parser/ModuleParsing.kt

@@ -5,7 +5,6 @@ import prog8.ast.*
 import prog8.compiler.LauncherType
 import prog8.compiler.OutputType
 import prog8.determineCompilationOptions
-import java.io.File
 import java.io.InputStream
 import java.nio.file.Files
 import java.nio.file.Path

compiler/src/prog8/stackvm/Program.kt

@@ -1,9 +1,6 @@
 package prog8.stackvm
 
-import prog8.ast.DataType
-import prog8.ast.NumericDatatypes
-import prog8.ast.Position
-import prog8.ast.unescape
+import prog8.ast.*
 import prog8.compiler.HeapValues
 import prog8.compiler.intermediate.*
 import java.io.File
@@ -14,7 +11,7 @@ class Program (val name: String,
                val program: MutableList<Instruction>,
                val variables: Map<String, Value>,
                val memoryPointers: Map<String, Pair<Int, DataType>>,
-               val labels: Map<String, Instruction>,
+               val labels: Map<String, Int>,
                val memory: Map<Int, List<Value>>,
                val heap: HeapValues)
 {
@@ -23,7 +20,6 @@ class Program (val name: String,
         program.add(LabelInstr("____program_end", false))
         program.add(Instruction(Opcode.TERMINATE))
         program.add(Instruction(Opcode.NOP))
-        connect()
     }
 
     companion object {
@@ -34,7 +30,7 @@ class Program (val name: String,
             val program = mutableListOf<Instruction>()
             val variables = mutableMapOf<String, Value>()
             val memoryPointers = mutableMapOf<String, Pair<Int, DataType>>()
-            val labels = mutableMapOf<String, Instruction>()
+            val labels = mutableMapOf<String, Int>()
 
             while(lines.hasNext()) {
                 val (lineNr, line) = lines.next()
@@ -56,7 +52,7 @@ class Program (val name: String,
                               program: MutableList<Instruction>,
                               variables: MutableMap<String, Value>,
                               memoryPointers: MutableMap<String, Pair<Int, DataType>>,
-                              labels: MutableMap<String, Instruction>)
+                              labels: MutableMap<String, Int>)
         {
             while(true) {
                 val (_, line) = lines.next()
@@ -70,8 +66,10 @@ class Program (val name: String,
                     loadMemoryPointers(lines, memoryPointers, heap)
                 else if(line=="%instructions") {
                     val (blockInstructions, blockLabels) = loadInstructions(lines, heap)
+                    val baseIndex = program.size
                     program.addAll(blockInstructions)
-                    labels.putAll(blockLabels)
+                    val labelsWithIndex = blockLabels.mapValues { baseIndex+blockInstructions.indexOf(it.value) }
+                    labels.putAll(labelsWithIndex)
                 }
             }
         }
@@ -89,10 +87,7 @@ class Program (val name: String,
             }
             heapvalues.sortedBy { it.first }.forEach {
                 when(it.second) {
-                    DataType.STR,
-                    DataType.STR_P,
-                    DataType.STR_S,
-                    DataType.STR_PS -> heap.add(it.second, unescape(it.third.substring(1, it.third.length-1), Position("<stackvmsource>", 0, 0, 0)))
+                    DataType.STR, DataType.STR_S -> heap.add(it.second, unescape(it.third.substring(1, it.third.length-1), Position("<stackvmsource>", 0, 0, 0)))
                     DataType.ARRAY_UB, DataType.ARRAY_B,
                     DataType.ARRAY_UW, DataType.ARRAY_W -> {
                         val numbers = it.third.substring(1, it.third.length-1).split(',')
@@ -148,8 +143,19 @@ class Program (val name: String,
                             Instruction(opcode, callLabel = withoutQuotes)
                         }
                         Opcode.SYSCALL -> {
-                            val call = Syscall.valueOf(args!!)
-                            Instruction(opcode, Value(DataType.UBYTE, call.callNr))
+                            if(args!! in syscallNames) {
+                                val call = Syscall.valueOf(args)
+                                Instruction(opcode, Value(DataType.UBYTE, call.callNr))
+                            } else {
+                                val args2 = args.replace('.', '_')
+                                if(args2 in syscallNames) {
+                                    val call = Syscall.valueOf(args2)
+                                    Instruction(opcode, Value(DataType.UBYTE, call.callNr))
+                                } else {
+                                    // the syscall is not yet implemented. emit a stub.
+                                    Instruction(Opcode.SYSCALL, Value(DataType.UBYTE, Syscall.SYSCALLSTUB.callNr), callLabel = args2)
+                                }
+                            }
                         }
                         else -> {
                             Instruction(opcode, getArgValue(args, heap))
@@ -202,7 +208,7 @@ class Program (val name: String,
                     DataType.UWORD -> Value(DataType.UWORD, valueStr.substring(3).toInt(16))
                     DataType.WORD -> Value(DataType.WORD, valueStr.substring(2).toInt(16))
                     DataType.FLOAT -> Value(DataType.FLOAT, valueStr.substring(2).toDouble())
-                    DataType.STR, DataType.STR_P, DataType.STR_S, DataType.STR_PS -> {
+                    in StringDatatypes -> {
                         if(valueStr.startsWith('"') && valueStr.endsWith('"'))
                             throw VmExecutionException("encountered a var with a string value, but all string values should already have been moved into the heap")
                         else if(!valueStr.startsWith("heap:"))
@@ -212,11 +218,7 @@ class Program (val name: String,
                             Value(type, heapId)
                         }
                     }
-                    DataType.ARRAY_UB,
-                    DataType.ARRAY_B,
-                    DataType.ARRAY_UW,
-                    DataType.ARRAY_W,
-                    DataType.ARRAY_F -> {
+                    in ArrayDatatypes -> {
                         if(!valueStr.startsWith("heap:"))
                             throw VmExecutionException("invalid array value, should be a heap reference")
                         else {
@@ -224,6 +226,7 @@ class Program (val name: String,
                             Value(type, heapId)
                         }
                     }
+                    else -> throw VmExecutionException("weird datatype")
                 }
                 vars[name] = value
             }
@@ -270,50 +273,4 @@ class Program (val name: String,
             }
         }
     }
-
-
-    private fun connect() {
-        val it1 = program.iterator()
-        val it2 = program.iterator()
-        it2.next()
-
-        while(it1.hasNext() && it2.hasNext()) {
-            val instr = it1.next()
-            val nextInstr = it2.next()
-            when(instr.opcode) {
-                Opcode.TERMINATE -> instr.next = instr          // won't ever execute a next instruction
-                Opcode.RETURN -> instr.next = instr             // kinda a special one, in actuality the return instruction is dynamic
-                Opcode.JUMP -> {
-                    if(instr.callLabel==null) {
-                        throw VmExecutionException("stackVm doesn't support JUMP to memory address")
-                    } else {
-                        // jump to label
-                        val target = labels[instr.callLabel] ?: throw VmExecutionException("undefined label: ${instr.callLabel}")
-                        instr.next = target
-                    }
-                }
-                Opcode.BCC, Opcode.BCS, Opcode.BZ, Opcode.BNZ, Opcode.BNEG, Opcode.BPOS, Opcode.JZ, Opcode.JNZ, Opcode.JZW, Opcode.JNZW -> {
-                    if(instr.callLabel==null) {
-                        throw VmExecutionException("stackVm doesn't support branch to memory address")
-                    } else {
-                        // branch to label
-                        val jumpInstr = labels[instr.callLabel] ?: throw VmExecutionException("undefined label: ${instr.callLabel}")
-                        instr.next = jumpInstr
-                        instr.nextAlt = nextInstr
-                    }
-                }
-                Opcode.CALL -> {
-                    if(instr.callLabel==null) {
-                        throw VmExecutionException("stackVm doesn't support CALL to memory address")
-                    } else {
-                        // call label
-                        val jumpInstr = labels[instr.callLabel] ?: throw VmExecutionException("undefined label: ${instr.callLabel}")
-                        instr.next = jumpInstr
-                        instr.nextAlt = nextInstr  // instruction to return to
-                    }
-                }
-                else -> instr.next = nextInstr
-            }
-        }
-    }
 }

compiler/src/prog8/stackvm/ScreenDialog.kt

@@ -15,6 +15,8 @@ class BitmapScreenPanel : KeyListener, JPanel() {
 
     private val image = BufferedImage(SCREENWIDTH, SCREENHEIGHT, BufferedImage.TYPE_INT_ARGB)
     private val g2d = image.graphics as Graphics2D
+    private var cursorX: Int=0
+    private var cursorY: Int=0
 
     init {
         val size = Dimension(image.width * SCALING, image.height * SCALING)
@@ -48,6 +50,8 @@ class BitmapScreenPanel : KeyListener, JPanel() {
     fun clearScreen(color: Int) {
         g2d.background = palette[color and 15]
         g2d.clearRect(0, 0, BitmapScreenPanel.SCREENWIDTH, BitmapScreenPanel.SCREENHEIGHT)
+        cursorX = 0
+        cursorY = 0
     }
     fun setPixel(x: Int, y: Int, color: Int) {
         image.setRGB(x, y, palette[color and 15].rgb)
@@ -56,25 +60,74 @@ class BitmapScreenPanel : KeyListener, JPanel() {
         g2d.color = palette[color and 15]
         g2d.drawLine(x1, y1, x2, y2)
     }
-    fun writeText(x: Int, y: Int, text: String, color: Int) {
-        if(color!=1) {
-            TODO("text can only be white for now")
-        }
-        var xx=x
-        var yy=y
-        for(sc in Petscii.encodeScreencode(text, true)) {
-            setChar(xx, yy, sc)
-            xx++
-            if(xx>=(SCREENWIDTH/8)) {
-                yy++
-                xx=0
+    fun printText(text: String, color: Int, lowercase: Boolean) {
+        val lines = text.split('\n')
+        for(line in lines.withIndex()) {
+            printTextSingleLine(line.value, color, lowercase)
+            if(line.index<lines.size-1) {
+                cursorX=0
+                cursorY++
             }
         }
     }
+    private fun printTextSingleLine(text: String, color: Int, lowercase: Boolean) {
+        if(color!=1) {
+            TODO("text can only be white for now")
+        }
+        for(clearx in cursorX until cursorX+text.length) {
+            g2d.clearRect(8*clearx, 8*y, 8, 8)
+        }
+        for(sc in Petscii.encodeScreencode(text, lowercase)) {
+            setChar(cursorX, cursorY, sc)
+            cursorX++
+            if(cursorX>=(SCREENWIDTH/8)) {
+                cursorY++
+                cursorX=0
+            }
+        }
+    }
+
+    fun printChar(char: Short) {
+        if(char==13.toShort() || char==141.toShort()) {
+            cursorX=0
+            cursorY++
+        } else {
+            setChar(cursorX, cursorY, char)
+            cursorX++
+            if (cursorX >= (SCREENWIDTH / 8)) {
+                cursorY++
+                cursorX = 0
+            }
+        }
+    }
+
     fun setChar(x: Int, y: Int, screenCode: Short) {
+        g2d.clearRect(8*x, 8*y, 8, 8)
         g2d.drawImage(Charset.shiftedChars[screenCode.toInt()], 8*x, 8*y , null)
     }
 
+    fun setCursorPos(x: Int, y: Int) {
+        cursorX = x
+        cursorY = y
+    }
+
+    fun getCursorPos(): Pair<Int, Int> {
+        return Pair(cursorX, cursorY)
+    }
+
+    fun writeText(x: Int, y: Int, text: String, color: Int, lowercase: Boolean) {
+        var xx=x
+        if(color!=1) {
+            TODO("text can only be white for now")
+        }
+        for(clearx in xx until xx+text.length) {
+            g2d.clearRect(8*clearx, 8*y, 8, 8)
+        }
+        for(sc in Petscii.encodeScreencode(text, lowercase)) {
+            setChar(xx++, y, sc)
+        }
+    }
+
 
     companion object {
         const val SCREENWIDTH = 320

compiler/test/StackVMOpcodeTests.kt

@@ -58,7 +58,7 @@ class TestStackVmOpcodes {
     private fun makeProg(ins: MutableList<Instruction>,
                  vars: Map<String, Value>?=null,
                  memoryPointers: Map<String, Pair<Int, DataType>>?=null,
-                 labels: Map<String, Instruction>?=null,
+                 labels: Map<String, Int>?=null,
                  mem: Map<Int, List<Value>>?=null) : Program {
         val heap = HeapValues()
         return Program("test", ins, vars ?: mapOf(), memoryPointers ?: mapOf(), labels ?: mapOf(), mem ?: mapOf(), heap)
@@ -751,7 +751,7 @@ class TestStackVmOpcodes {
                 Instruction(Opcode.LINE, callLabel = "string1"),
                 Instruction(Opcode.TERMINATE),
                 Instruction(Opcode.LINE, callLabel = "string2"))
-        val labels = mapOf("label" to ins.last())   // points to the second LINE instruction
+        val labels = mapOf("label" to ins.size-1)   // points to the second LINE instruction
         vm.load(makeProg(ins, labels=labels), null)
         vm.step(2)
         assertEquals("", vm.sourceLine)
@@ -771,7 +771,7 @@ class TestStackVmOpcodes {
                 Instruction(Opcode.LINE, callLabel = "string1"),
                 Instruction(Opcode.TERMINATE),
                 Instruction(Opcode.LINE, callLabel = "string2"))
-        val labels = mapOf("label" to ins.last())   // points to the second LINE instruction
+        val labels = mapOf("label" to ins.size-1)   // points to the second LINE instruction
         vm.load(makeProg(ins, labels=labels), null)
         assertFalse(vm.P_carry)
         vm.step(2)
@@ -792,7 +792,7 @@ class TestStackVmOpcodes {
                 Instruction(Opcode.LINE, callLabel = "string1"),
                 Instruction(Opcode.TERMINATE),
                 Instruction(Opcode.LINE, callLabel = "string2"))
-        val labels = mapOf("label" to ins.last())   // points to the second LINE instruction
+        val labels = mapOf("label" to ins.size-1)   // points to the second LINE instruction
         vm.load(makeProg(ins, labels=labels), null)
         vm.step(2)
         assertEquals("", vm.sourceLine)
@@ -812,7 +812,7 @@ class TestStackVmOpcodes {
                 Instruction(Opcode.LINE, callLabel = "string1"),
                 Instruction(Opcode.TERMINATE),
                 Instruction(Opcode.LINE, callLabel = "string2"))
-        val labels = mapOf("label" to ins.last())   // points to the second LINE instruction
+        val labels = mapOf("label" to ins.size-1)   // points to the second LINE instruction
         vm.load(makeProg(ins, labels=labels), null)
         vm.step(2)
         assertEquals("", vm.sourceLine)
@@ -832,7 +832,7 @@ class TestStackVmOpcodes {
                 Instruction(Opcode.LINE, callLabel = "string1"),
                 Instruction(Opcode.TERMINATE),
                 Instruction(Opcode.LINE, callLabel = "string2"))
-        val labels = mapOf("label" to ins.last())   // points to the second LINE instruction
+        val labels = mapOf("label" to ins.size-1)   // points to the second LINE instruction
         vm.load(makeProg(ins, labels=labels), null)
         vm.step(2)
         assertEquals("", vm.sourceLine)
@@ -852,7 +852,7 @@ class TestStackVmOpcodes {
                 Instruction(Opcode.LINE, callLabel = "string1"),
                 Instruction(Opcode.TERMINATE),
                 Instruction(Opcode.LINE, callLabel = "string2"))
-        val labels = mapOf("label" to ins.last())   // points to the second LINE instruction
+        val labels = mapOf("label" to ins.size-1)   // points to the second LINE instruction
         vm.load(makeProg(ins, labels=labels), null)
         vm.step(2)
         assertEquals("", vm.sourceLine)
@@ -869,7 +869,7 @@ class TestStackVmOpcodes {
                 Instruction(Opcode.LINE, callLabel = "string1"),
                 Instruction(Opcode.TERMINATE),
                 Instruction(Opcode.LINE, callLabel = "string2"))
-        val labels = mapOf("label" to ins.last())   // points to the second LINE instruction
+        val labels = mapOf("label" to ins.size-1)   // points to the second LINE instruction
         vm.load(makeProg(ins, labels=labels), null)
         vm.step(2)
         assertEquals("string2", vm.sourceLine)
@@ -889,7 +889,7 @@ class TestStackVmOpcodes {
             vm.step(1)
         }
 
-        vm.callstack.add(ins[2])        // set the LINE opcode as return instruction
+        vm.callstack.add(2)        // set the LINE opcode as return instruction
         assertEquals("", vm.sourceLine)
         vm.step(2)
         assertEquals("string1", vm.sourceLine)
@@ -906,12 +906,12 @@ class TestStackVmOpcodes {
                 Instruction(Opcode.LINE, callLabel = "called"),
                 Instruction(Opcode.RETURN)
         )
-        val labels = mapOf("label" to ins[3])   // points to the LINE instruction
+        val labels = mapOf("label" to 3)   // points to the LINE instruction
         vm.load(makeProg(ins, labels = labels), null)
         vm.step(1)
         assertEquals("", vm.sourceLine)
         assertEquals(1, vm.callstack.size)
-        assertSame(ins[1], vm.callstack.peek())
+        assertSame(1, vm.callstack.peek())
         vm.step(1)
         assertEquals("called", vm.sourceLine)
         vm.step(1)

compiler/test/ValueOperationsTests.kt

@@ -82,7 +82,6 @@ class TestStackVmValue {
     fun testEqualsAndNotEqualsHeapTypes()
     {
         assertTrue(sameValueAndType(Value(DataType.STR, 999), Value(DataType.STR, 999)))
-        assertFalse(sameValueAndType(Value(DataType.STR, 999), Value(DataType.STR_P, 999)))
         assertFalse(sameValueAndType(Value(DataType.STR, 999), Value(DataType.STR, 222)))
 
         assertTrue(sameValueAndType(Value(DataType.ARRAY_UB, 99), Value(DataType.ARRAY_UB, 99)))

docs/source/index.rst

@@ -25,6 +25,18 @@ The project is on github: https://github.com/irmen/prog8.git
 
 This software is licensed under the GNU GPL 3.0, see https://www.gnu.org/licenses/gpl.html
 
+
+.. image:: _static/cube3d.png
+    :width: 33%
+    :alt: 3d rotating sprites
+.. image:: _static/wizzine.png
+    :width: 33%
+    :alt: Simple wizzine sprite effect
+.. image:: _static/tehtriz.png
+    :width: 33%
+    :alt: Fully playable tetris clone
+
+
 Code example
 ------------
 

docs/source/programming.rst

@@ -604,8 +604,11 @@ ln(x)
 log2(x)
     Base 2 logarithm.
 
+sqrt16(w)
+	16 bit unsigned integer Square root. Result is unsigned byte.
+
 sqrt(x)
-	Square root.
+	Floating point Square root.
 
 round(x)
 	Rounds the floating point to the closest integer.
@@ -639,6 +642,11 @@ len(x)
     Note: this can be different from the number of *bytes* in memory if the datatype isn't a byte.
     Note: lengths of strings and arrays are determined at compile-time! If your program modifies the actual
     length of the string during execution, the value of len(string) may no longer be correct!
+    (use strlen function if you want to dynamically determine the length)
+
+strlen(str)
+    Number of bytes in the string. This value is determined during runtime and counts upto
+    the first terminating 0 byte in the string, regardless of the size of the string during compilation time.
 
 lsb(x)
     Get the least significant byte of the word x. Equivalent to the cast "x as ubyte".

docs/source/syntaxreference.rst

@@ -258,12 +258,8 @@ type identifier  type                     storage size       example var declara
 ``float[x]``     floating-point array     5*x bytes          ``float[4] myvar = [1.1, 2.2, 3.3, 4.4]``
 ``str``          string (petscii)         varies             ``str myvar = "hello."``
                                                              implicitly terminated by a 0-byte
-``str_p``        pascal-string (petscii)  varies             ``str_p myvar = "hello."``
-                                                             implicit first byte = length, no 0-byte
 ``str_s``        string (screencodes)     varies             ``str_s myvar = "hello."``
                                                              implicitly terminated by a 0-byte
-``str_ps``       pascal-string            varies             ``str_ps myvar = "hello."``
-                 (screencodes)                               implicit first byte = length, no 0-byte
 ===============  =======================  =================  =========================================
 
 **arrays:** you can split an array initializer list over several lines if you want.
@@ -366,14 +362,13 @@ Operators
 
 .. todo::
     address-of: ``#`` or ``&`` (to stay close to C)
-	Takes the address of the symbol following it:   ``word  address =  &somevar``
+    Takes the address of the symbol following it:   ``word address = &somevar``
     Perhaps requires an explicit pointer type as well instead of just word?
 
     This can replace the ``memory`` var decl prefix as well, instead of
     ``memory uword var = $c000`` we could write ``&uword var = $c000``
 
 
-
 arithmetic: ``+``  ``-``  ``*``  ``/``  ``**``  ``%``
     ``+``, ``-``, ``*``, ``/`` are the familiar arithmetic operations.
     ``/`` is division (will result in integer division when using on integer operands, and a floating point division when at least one of the operands is a float)
@@ -440,10 +435,20 @@ You call a subroutine like this::
         [ result = ]  subroutinename_or_address ( [argument...] )
 
         ; example:
-        resultvariable  =  subroutine ( arg1, arg2, arg3 )
+        resultvariable = subroutine(arg1, arg2, arg3)
 
 Arguments are separated by commas. The argument list can also be empty if the subroutine
-takes no parameters.
+takes no parameters.  If the subroutine returns a value, you can still omit the assignment to
+a result variable (but the compiler will warn you about discarding the result of the call).
+
+Normal subroutines can only return zero or one return values.
+However, the special ``asmsub`` routines (implemented in assembly code or referencing
+a routine in kernel ROM) can return more than one return values, for instance a status
+in the carry bit and a number in A, or a 16-bit value in A/Y registers.
+Only for these kind of subroutines it is possible to write a multi value assignment to
+store the resulting values::
+
+        var1, var2, var3 = asmsubroutine()
 
 
 

examples/bdmusic.p8

@@ -44,10 +44,10 @@ sub start() {
 
     sub print_notes(ubyte n1, ubyte n2) {
         c64.CHROUT('\n')
-        c64scr.PLOT(n1/2, 24)
+        c64scr.plot(n1/2, 24)
         c64.COLOR=7
         c64.CHROUT('Q')
-        c64scr.PLOT(n2/2, 24)
+        c64scr.plot(n2/2, 24)
         c64.COLOR=4
         c64.CHROUT('Q')
     }

examples/cube3d-float.p8

@@ -24,7 +24,7 @@
             c64scr.clear_screenchars(32)
             draw_edges()
             time+=0.2
-            c64scr.PLOT(0,0)
+            c64scr.plot(0,0)
             c64scr.print("3d cube! (float) ")
             c64scr.print_ub(c64.TIME_LO)
             c64scr.print(" jiffies/frame")

examples/cube3d-sprites.p8

@@ -89,7 +89,7 @@
             anglex-=500
             angley+=217
             anglez+=452
-            c64scr.PLOT(0,0)
+            c64scr.plot(0,0)
             c64scr.print("3d cube! (sprites) ")
             c64scr.print_ub(c64.TIME_LO)
             c64scr.print(" jiffies/frame ")

examples/cube3d.p8

@@ -29,7 +29,7 @@
             anglex+=1000
             angley+=433
             anglez+=907
-            c64scr.PLOT(0,0)
+            c64scr.plot(0,0)
             c64scr.print("3d cube! (integer) ")
             c64scr.print_ub(c64.TIME_LO)
             c64scr.print(" jiffies/frame")

examples/hello.p8

@@ -32,7 +32,6 @@
         float minutes = floor(clock_seconds / 60)
         clock_seconds = floor(clock_seconds - minutes * 60.0)
 
-    ; @todo implement strcpy/strcat/strlen?
         c64scr.print("system time in ti$ is ")
         c64flt.print_f(hours)
         c64.CHROUT(':')

examples/looplabelproblem.p8

@@ -1,18 +0,0 @@
-
-~ main {
-
-    sub start() {
-
-        if A>10 {
-            A=44
-            while true {
-                ;derp
-            }
-        } else {
-
-            gameover:
-                goto gameover
-        }
-    }
-
-}

examples/mandelbrot.p8

@@ -10,7 +10,7 @@
     const ubyte max_iter = 16
 
     sub start()  {
-        c64scr.print("calculating mandelbrot fractal...\n")
+        c64scr.print("calculating mandelbrot fractal...")
 
         c64.TIME_HI=0
         c64.TIME_MID=0
@@ -42,7 +42,7 @@
         float duration = floor(((c64.TIME_LO as float)
                                 + 256.0*(c64.TIME_MID as float)
                                 + 65536.0*(c64.TIME_HI as float))/60.0)
-        c64scr.PLOT(0, 21)
+        c64scr.plot(0, 21)
         c64scr.print("finished in ")
         c64flt.print_f(duration)
         c64scr.print(" seconds!\n")

examples/numbergame.p8

@@ -29,7 +29,7 @@
                 c64scr.print("es")
             c64scr.print(" left.\nWhat is your next guess? ")
             c64scr.input_chars(input)
-            ubyte guess = c64utils.str2ubyte(input)
+            ubyte guess = lsb(c64utils.str2uword(input))
 
             if guess==secretnumber {
                 return ending(true)

examples/rasterbars.p8

@@ -23,23 +23,19 @@
     ubyte ypos = 0
 
     sub irq() {
-        Y++   ; delay for alignment
-        Y++   ; delay for alignment
-        Y++   ; delay for alignment
-        Y++   ; delay for alignment
+        Y++     ; slight timing delay to avoid rasterline transition issues
         ubyte rasterpos = c64.RASTER
+
         if color!=len(colors) {
             c64.EXTCOL = colors[color]
-            c64.RASTER = rasterpos+barheight
             color++
+            c64.RASTER = rasterpos+barheight
         }
         else {
-            Y++   ; delay for alignment
-            Y++   ; delay for alignment
             ypos += 2
             c64.EXTCOL = 0
-            c64.RASTER = sin8u(ypos)/2+40
             color = 0
+            c64.RASTER = sin8u(ypos)/2+40
         }
     }
 }

examples/tehtriz.p8

@@ -1,10 +1,14 @@
-
 ; TehTriz - a Tetris clone.
 ;
+; features:
+;   holding area
+;   wall kick rotations
+;   shows next piece
+;   staged speed increase
+;   some simple sound effects
+;
+; @todo show ghost?
 
-; @todo: holding a block
-; @todo: joystick control
-; @todo: sometimes the game gets confused about what the current tetromino is and will draw the wrong one. Maybe occurs when rotating directly after dropping the previous?
 
 ~ main {
 
@@ -19,7 +23,9 @@
     ubyte xpos
     ubyte ypos
     ubyte nextBlock
-    ubyte speedlevel = 1
+    ubyte speedlevel
+    ubyte holding
+    ubyte holdingAllowed
 
 
     sub start() {
@@ -50,8 +56,10 @@ waitkey:
                     gameOver()
                     goto newgame
                 } else {
+                    sound.blockrotate()
                     checkForLines()
                     spawnNextBlock()
+                    score++
                 }
             }
 
@@ -76,7 +84,7 @@ waitkey:
             }
             drawBlock(xpos, ypos, 160)
         }
-        else if key==29 or key=='.' {
+        else if key==29 or key=='/' {
             ; move right
             drawBlock(xpos, ypos, 32)
             if blocklogic.noCollision(xpos+1, ypos) {
@@ -84,7 +92,7 @@ waitkey:
             }
             drawBlock(xpos, ypos, 160)
         }
-        else if key==17 or key=='m' {
+        else if key==17 or key=='.' {
             ; move down faster
             drawBlock(xpos, ypos, 32)
             if blocklogic.noCollision(xpos, ypos+1) {
@@ -108,6 +116,8 @@ waitkey:
                 drawBlock(xpos, ypos, 160)
                 checkForLines()
                 spawnNextBlock()
+                score++
+                drawScore()
             }
         }
         else if key=='z' {      ; no joystick equivalent (there is only 1 fire button)
@@ -148,6 +158,24 @@ waitkey:
             }
             drawBlock(xpos, ypos, 160)
         }
+        else if key=='c' {
+            ; hold
+            if holdingAllowed {
+                sound.swapping()
+                if holding<7 {
+                    drawBlock(xpos, ypos, 32)
+                    ubyte newholding = blocklogic.currentBlockNum
+                    swapBlock(holding)
+                    holding = newholding
+                    holdingAllowed = false
+                } else {
+                    holding = blocklogic.currentBlockNum
+                    drawBlock(xpos, ypos, 32)
+                    spawnNextBlock()
+                }
+                drawHoldBlock()
+            }
+        }
     }
 
     sub checkForLines() {
@@ -164,7 +192,10 @@ waitkey:
             }
         }
         if num_lines {
-            sound.lineclear()
+            if num_lines>3
+                sound.lineclear_big()
+            else
+                sound.lineclear()
             c64.TIME_LO=0
             while c64.TIME_LO<20 {
                 ; slight delay to flash the line
@@ -183,24 +214,24 @@ waitkey:
 
     sub gameOver() {
         sound.gameover()
-        c64scr.PLOT(7, 7)
+        c64scr.plot(7, 7)
         c64.CHROUT('U')
         c64scr.print("────────────────────────")
         c64.CHROUT('I')
-        c64scr.PLOT(7, 8)
+        c64scr.plot(7, 8)
         c64scr.print("│*** g a m e  o v e r ***│")
-        c64scr.PLOT(7, 9)
+        c64scr.plot(7, 9)
         c64.CHROUT('J')
         c64scr.print("────────────────────────")
         c64.CHROUT('K')
 
-        c64scr.PLOT(7, 18)
+        c64scr.plot(7, 18)
         c64.CHROUT('U')
         c64scr.print("────────────────────────")
         c64.CHROUT('I')
-        c64scr.PLOT(7, 19)
+        c64scr.plot(7, 19)
         c64scr.print("│    f1 for new game     │")
-        c64scr.PLOT(7, 20)
+        c64scr.plot(7, 20)
         c64.CHROUT('J')
         c64scr.print("────────────────────────")
         c64.CHROUT('K')
@@ -215,51 +246,59 @@ waitkey:
         score = 0
         xpos = startXpos
         ypos = startYpos
+        speedlevel = 1
         nextBlock = rnd() % 7
+        holding = 255
+        holdingAllowed = true
     }
 
-    sub spawnNextBlock() {
+    sub swapBlock(ubyte newblock) {
         c64.TIME_LO = 0
-        blocklogic.newCurrentBlock(nextBlock)
-        nextBlock = (rnd() + c64.RASTER) % 7
-        drawNextBlock()
+        blocklogic.newCurrentBlock(newblock)
         xpos = startXpos
         ypos = startYpos
         drawBlock(xpos, ypos, 160)
-        score++
+    }
+
+    sub spawnNextBlock() {
+        swapBlock(nextBlock)
+        nextBlock = (rnd() + c64.RASTER) % 7
+        drawNextBlock()
+        holdingAllowed = true
     }
 
     sub drawBoard() {
         c64.CLEARSCR()
         c64.COLOR = 7
-        c64scr.PLOT(1,1)
+        c64scr.plot(1,1)
         c64scr.print("irmen's")
-        c64scr.PLOT(1,2)
+        c64scr.plot(2,2)
         c64scr.print("teh▁triz")
-        c64scr.PLOT(2,22)
-        c64scr.print("speed: ")
         c64.COLOR = 5
-        c64scr.PLOT(28,3)
+        c64scr.plot(6,4)
+        c64scr.print("hold:")
+        c64scr.plot(2,22)
+        c64scr.print("speed: ")
+        c64scr.plot(28,3)
         c64scr.print("next:")
-        c64scr.PLOT(28,10)
+        c64scr.plot(28,10)
         c64scr.print("lines:")
-        c64scr.PLOT(28,14)
+        c64scr.plot(28,14)
         c64scr.print("score:")
         c64.COLOR = 12
-        c64scr.PLOT(28,18)
+        c64scr.plot(27,18)
         c64scr.print("controls:")
         c64.COLOR = 11
-        c64scr.PLOT(27,19)
-        c64scr.print("z/x  rotate")
-        c64scr.PLOT(27,20)
-        c64scr.print(",/.  move")
-        c64scr.PLOT(27,21)
+        c64scr.plot(28,19)
+        c64scr.print(",/  move")
+        c64scr.plot(28,20)
+        c64scr.print("zx  rotate")
+        c64scr.plot(29,21)
+        c64scr.print(".  descend")
+        c64scr.plot(27,22)
         c64scr.print("spc  drop")
-        c64scr.PLOT(27,22)
-        c64scr.print("  m  descend")
-        ; @todo joystick control:
-        ; c64scr.PLOT(27,23)
-        ; c64scr.print("or joystick2")
+        c64scr.plot(29,23)
+        c64scr.print("c  hold")
 
         c64scr.setcc(boardOffsetX-1, boardOffsetY-2, 255, 0)           ; invisible barrier
         c64scr.setcc(boardOffsetX-1, boardOffsetY-3, 255, 0)           ; invisible barrier
@@ -281,37 +320,56 @@ waitkey:
             c64scr.setcc(boardOffsetX+boardWidth, i, 84, 11)
         }
 
-        for i in 5 to 0 step -1 {
-            blocklogic.newCurrentBlock(i)
-            drawBlock(3, 3+i*3, 102)                    ; 102 = stipple
+        ubyte[5] colors = [6,8,7,5,4]
+        for i in len(colors)-1 to 0 step -1 {
+            for ubyte x in 5 to 0 step -1 {
+                c64scr.setcc(6+x-i, 11+2*i, 102, colors[i])
+            }
         }
         drawScore()
     }
 
     sub drawScore() {
         c64.COLOR=1
-        c64scr.PLOT(30,11)
+        c64scr.plot(30,11)
         c64scr.print_uw(lines)
-        c64scr.PLOT(30,15)
+        c64scr.plot(30,15)
         c64scr.print_uw(score)
-        c64scr.PLOT(9,22)
+        c64scr.plot(9,22)
         c64scr.print_ub(speedlevel)
     }
 
     sub drawNextBlock() {
         const ubyte nextBlockXpos = 29
+        const ubyte nextBlockYpos = 5
         for ubyte x in nextBlockXpos+3 to nextBlockXpos step -1 {
-            c64scr.setcc(x, 5, ' ', 0)
-            c64scr.setcc(x, 6, ' ', 0)
+            c64scr.setcc(x, nextBlockYpos, ' ', 0)
+            c64scr.setcc(x, nextBlockYpos+1, ' ', 0)
         }
 
         ; reuse the normal block draw routine (because we can't manipulate array pointers yet)
         ubyte prev = blocklogic.currentBlockNum
         blocklogic.newCurrentBlock(nextBlock)
-        drawBlock(nextBlockXpos, 5, 160)
+        drawBlock(nextBlockXpos, nextBlockYpos, 160)
         blocklogic.newCurrentBlock(prev)
     }
 
+    sub drawHoldBlock() {
+        const ubyte holdBlockXpos = 7
+        const ubyte holdBlockYpos = 6
+        for ubyte x in holdBlockXpos+3 to holdBlockXpos step -1 {
+            c64scr.setcc(x, holdBlockYpos, '@', 0)
+            c64scr.setcc(x, holdBlockYpos+1, '@', 0)
+        }
+        if holding < 7 {
+            ; reuse the normal block draw routine (because we can't manipulate array pointers yet)
+            ubyte prev = blocklogic.currentBlockNum
+            blocklogic.newCurrentBlock(holding)
+            drawBlock(holdBlockXpos, holdBlockYpos, 160)
+            blocklogic.newCurrentBlock(prev)
+        }
+    }
+
     sub drawBlock(ubyte x, ubyte y, ubyte character) {
         for ubyte i in 15 to 0 step -1 {
             ubyte c=blocklogic.currentBlock[i]
@@ -399,6 +457,7 @@ waitkey:
             rotated[13] = currentBlock[11]
             rotated[14] = currentBlock[7]
             rotated[15] = currentBlock[3]
+            memcopy(rotated, currentBlock, len(currentBlock))
         }
         else if currentBlockNum!=3 {
             ; rotate all blocks (except 3, the square) around their center square in a 3x3 matrix
@@ -412,9 +471,8 @@ waitkey:
             rotated[8] = currentBlock[10]
             rotated[9] = currentBlock[6]
             rotated[10] = currentBlock[2]
+            memcopy(rotated, currentBlock, len(currentBlock))
         }
-
-        memcopy(rotated, currentBlock, len(currentBlock))
     }
 
     sub rotateCCW() {
@@ -437,6 +495,7 @@ waitkey:
             rotated[13] = currentBlock[4]
             rotated[14] = currentBlock[8]
             rotated[15] = currentBlock[12]
+            memcopy(rotated, currentBlock, len(currentBlock))
         }
         else if currentBlockNum!=3 {
             ; rotate all blocks (except 3, the square) around their center square in a 3x3 matrix
@@ -450,8 +509,8 @@ waitkey:
             rotated[8] = currentBlock[0]
             rotated[9] = currentBlock[4]
             rotated[10] = currentBlock[8]
+            memcopy(rotated, currentBlock, len(currentBlock))
         }
-        memcopy(rotated, currentBlock, len(currentBlock))
     }
 
     ; For movement checking it is not needed to clamp the x/y coordinates,
@@ -535,6 +594,16 @@ waitkey:
         c64.CR1 = %10000001
     }
 
+    sub swapping() {
+        ; beep
+        c64.MVOL = 8
+        c64.AD1 = %01010111
+        c64.SR1 = %00000000
+        c64.FREQ1 = 5500
+        c64.CR1 = %00010000
+        c64.CR1 = %00010001
+    }
+
     sub lineclear() {
         ; explosion
         c64.MVOL = 15
@@ -545,6 +614,16 @@ waitkey:
         c64.CR1 = %10000001
     }
 
+    sub lineclear_big() {
+        ; big explosion
+        c64.MVOL = 15
+        c64.AD1 = %01101010
+        c64.SR1 = %00000000
+        c64.FREQ1 = 2600
+        c64.CR1 = %10000000
+        c64.CR1 = %10000001
+    }
+
     sub gameover() {
         ; buzz
         c64.MVOL = 15

examples/test.p8

@@ -1,12 +1,15 @@
-%import c64utils
 %zeropage basicsafe
 
+
 ~ main {
 
-    ; @todo see problem in looplabelproblem.p8
-    ; @todo compiler error for using literal values other than 0 or 1 with boolean expressions
+    ubyte @zp var1
 
     sub start() {
-
+        ubyte @zp var1
+        A=20
+        A=var1
+        Y=main.var1
     }
+
 }

parser/antlr/prog8.g4

@@ -111,7 +111,7 @@ constdecl: 'const' varinitializer ;
 
 memoryvardecl: 'memory' varinitializer;
 
-datatype:  'ubyte' | 'byte' | 'uword' | 'word' | 'float' | 'str' | 'str_p' | 'str_s' | 'str_ps' ;
+datatype:  'ubyte' | 'byte' | 'uword' | 'word' | 'float' | 'str' | 'str_s' ;
 
 arrayspec:  '[' expression ']' ;
 

parser/src/prog8/parser/prog8Lexer.java

@@ -1,4 +1,4 @@
-// Generated from prog8.g4 by ANTLR 4.7.2
+// Generated from ./parser/antlr/prog8.g4 by ANTLR 4.7.2
 
 package prog8.parser;
 
@@ -34,10 +34,9 @@ public class prog8Lexer extends Lexer {
 		T__87=88, T__88=89, T__89=90, T__90=91, T__91=92, T__92=93, T__93=94, 
 		T__94=95, T__95=96, T__96=97, T__97=98, T__98=99, T__99=100, T__100=101, 
 		T__101=102, T__102=103, T__103=104, T__104=105, T__105=106, T__106=107, 
-		T__107=108, T__108=109, T__109=110, T__110=111, T__111=112, LINECOMMENT=113, 
-		COMMENT=114, WS=115, EOL=116, NAME=117, DEC_INTEGER=118, HEX_INTEGER=119, 
-		BIN_INTEGER=120, FLOAT_NUMBER=121, STRING=122, INLINEASMBLOCK=123, SINGLECHAR=124, 
-		ZEROPAGE=125;
+		T__107=108, T__108=109, T__109=110, LINECOMMENT=111, COMMENT=112, WS=113, 
+		EOL=114, NAME=115, DEC_INTEGER=116, HEX_INTEGER=117, BIN_INTEGER=118, 
+		FLOAT_NUMBER=119, STRING=120, INLINEASMBLOCK=121, SINGLECHAR=122, ZEROPAGE=123;
 	public static String[] channelNames = {
 		"DEFAULT_TOKEN_CHANNEL", "HIDDEN"
 	};
@@ -61,10 +60,10 @@ public class prog8Lexer extends Lexer {
 			"T__81", "T__82", "T__83", "T__84", "T__85", "T__86", "T__87", "T__88", 
 			"T__89", "T__90", "T__91", "T__92", "T__93", "T__94", "T__95", "T__96", 
 			"T__97", "T__98", "T__99", "T__100", "T__101", "T__102", "T__103", "T__104", 
-			"T__105", "T__106", "T__107", "T__108", "T__109", "T__110", "T__111", 
-			"LINECOMMENT", "COMMENT", "WS", "EOL", "NAME", "DEC_INTEGER", "HEX_INTEGER", 
-			"BIN_INTEGER", "FLOAT_NUMBER", "FNUMBER", "STRING_ESCAPE_SEQ", "STRING", 
-			"INLINEASMBLOCK", "SINGLECHAR", "ZEROPAGE"
+			"T__105", "T__106", "T__107", "T__108", "T__109", "LINECOMMENT", "COMMENT", 
+			"WS", "EOL", "NAME", "DEC_INTEGER", "HEX_INTEGER", "BIN_INTEGER", "FLOAT_NUMBER", 
+			"FNUMBER", "STRING_ESCAPE_SEQ", "STRING", "INLINEASMBLOCK", "SINGLECHAR", 
+			"ZEROPAGE"
 		};
 	}
 	public static final String[] ruleNames = makeRuleNames();
@@ -74,19 +73,19 @@ public class prog8Lexer extends Lexer {
 			null, "'~'", "':'", "'goto'", "'%output'", "'%launcher'", "'%zeropage'", 
 			"'%zpreserved'", "'%address'", "'%import'", "'%breakpoint'", "'%asminclude'", 
 			"'%asmbinary'", "'%option'", "','", "'='", "'const'", "'memory'", "'ubyte'", 
-			"'byte'", "'uword'", "'word'", "'float'", "'str'", "'str_p'", "'str_s'", 
-			"'str_ps'", "'['", "']'", "'+='", "'-='", "'/='", "'*='", "'**='", "'&='", 
-			"'|='", "'^='", "'%='", "'<<='", "'>>='", "'++'", "'--'", "'+'", "'-'", 
-			"'**'", "'*'", "'/'", "'%'", "'<<'", "'>>'", "'<'", "'>'", "'<='", "'>='", 
-			"'=='", "'!='", "'&'", "'^'", "'|'", "'to'", "'step'", "'and'", "'or'", 
-			"'xor'", "'not'", "'('", "')'", "'as'", "'@'", "'return'", "'break'", 
-			"'continue'", "'.'", "'A'", "'X'", "'Y'", "'AX'", "'AY'", "'XY'", "'Pc'", 
-			"'Pz'", "'Pn'", "'Pv'", "'.w'", "'true'", "'false'", "'%asm'", "'sub'", 
-			"'->'", "'{'", "'}'", "'asmsub'", "'clobbers'", "'stack'", "'if'", "'else'", 
-			"'if_cs'", "'if_cc'", "'if_eq'", "'if_z'", "'if_ne'", "'if_nz'", "'if_pl'", 
-			"'if_pos'", "'if_mi'", "'if_neg'", "'if_vs'", "'if_vc'", "'for'", "'in'", 
-			"'while'", "'repeat'", "'until'", null, null, null, null, null, null, 
-			null, null, null, null, null, null, "'@zp'"
+			"'byte'", "'uword'", "'word'", "'float'", "'str'", "'str_s'", "'['", 
+			"']'", "'+='", "'-='", "'/='", "'*='", "'**='", "'&='", "'|='", "'^='", 
+			"'%='", "'<<='", "'>>='", "'++'", "'--'", "'+'", "'-'", "'**'", "'*'", 
+			"'/'", "'%'", "'<<'", "'>>'", "'<'", "'>'", "'<='", "'>='", "'=='", "'!='", 
+			"'&'", "'^'", "'|'", "'to'", "'step'", "'and'", "'or'", "'xor'", "'not'", 
+			"'('", "')'", "'as'", "'@'", "'return'", "'break'", "'continue'", "'.'", 
+			"'A'", "'X'", "'Y'", "'AX'", "'AY'", "'XY'", "'Pc'", "'Pz'", "'Pn'", 
+			"'Pv'", "'.w'", "'true'", "'false'", "'%asm'", "'sub'", "'->'", "'{'", 
+			"'}'", "'asmsub'", "'clobbers'", "'stack'", "'if'", "'else'", "'if_cs'", 
+			"'if_cc'", "'if_eq'", "'if_z'", "'if_ne'", "'if_nz'", "'if_pl'", "'if_pos'", 
+			"'if_mi'", "'if_neg'", "'if_vs'", "'if_vc'", "'for'", "'in'", "'while'", 
+			"'repeat'", "'until'", null, null, null, null, null, null, null, null, 
+			null, null, null, null, "'@zp'"
 		};
 	}
 	private static final String[] _LITERAL_NAMES = makeLiteralNames();
@@ -101,9 +100,9 @@ public class prog8Lexer extends Lexer {
 			null, null, null, null, null, null, null, null, null, null, null, null, 
 			null, null, null, null, null, null, null, null, null, null, null, null, 
 			null, null, null, null, null, null, null, null, null, null, null, null, 
-			null, null, null, null, null, "LINECOMMENT", "COMMENT", "WS", "EOL", 
-			"NAME", "DEC_INTEGER", "HEX_INTEGER", "BIN_INTEGER", "FLOAT_NUMBER", 
-			"STRING", "INLINEASMBLOCK", "SINGLECHAR", "ZEROPAGE"
+			null, null, null, "LINECOMMENT", "COMMENT", "WS", "EOL", "NAME", "DEC_INTEGER", 
+			"HEX_INTEGER", "BIN_INTEGER", "FLOAT_NUMBER", "STRING", "INLINEASMBLOCK", 
+			"SINGLECHAR", "ZEROPAGE"
 		};
 	}
 	private static final String[] _SYMBOLIC_NAMES = makeSymbolicNames();
@@ -167,13 +166,13 @@ public class prog8Lexer extends Lexer {
 	@Override
 	public void action(RuleContext _localctx, int ruleIndex, int actionIndex) {
 		switch (ruleIndex) {
-		case 123:
+		case 121:
 			STRING_action((RuleContext)_localctx, actionIndex);
 			break;
-		case 124:
+		case 122:
 			INLINEASMBLOCK_action((RuleContext)_localctx, actionIndex);
 			break;
-		case 125:
+		case 123:
 			SINGLECHAR_action((RuleContext)_localctx, actionIndex);
 			break;
 		}
@@ -213,299 +212,292 @@ public class prog8Lexer extends Lexer {
 	}
 
 	public static final String _serializedATN =
-		"\3\u608b\ua72a\u8133\ub9ed\u417c\u3be7\u7786\u5964\2\177\u0373\b\1\4\2"+
-		"\t\2\4\3\t\3\4\4\t\4\4\5\t\5\4\6\t\6\4\7\t\7\4\b\t\b\4\t\t\t\4\n\t\n\4"+
-		"\13\t\13\4\f\t\f\4\r\t\r\4\16\t\16\4\17\t\17\4\20\t\20\4\21\t\21\4\22"+
-		"\t\22\4\23\t\23\4\24\t\24\4\25\t\25\4\26\t\26\4\27\t\27\4\30\t\30\4\31"+
-		"\t\31\4\32\t\32\4\33\t\33\4\34\t\34\4\35\t\35\4\36\t\36\4\37\t\37\4 \t"+
-		" \4!\t!\4\"\t\"\4#\t#\4$\t$\4%\t%\4&\t&\4\'\t\'\4(\t(\4)\t)\4*\t*\4+\t"+
-		"+\4,\t,\4-\t-\4.\t.\4/\t/\4\60\t\60\4\61\t\61\4\62\t\62\4\63\t\63\4\64"+
-		"\t\64\4\65\t\65\4\66\t\66\4\67\t\67\48\t8\49\t9\4:\t:\4;\t;\4<\t<\4=\t"+
-		"=\4>\t>\4?\t?\4@\t@\4A\tA\4B\tB\4C\tC\4D\tD\4E\tE\4F\tF\4G\tG\4H\tH\4"+
-		"I\tI\4J\tJ\4K\tK\4L\tL\4M\tM\4N\tN\4O\tO\4P\tP\4Q\tQ\4R\tR\4S\tS\4T\t"+
-		"T\4U\tU\4V\tV\4W\tW\4X\tX\4Y\tY\4Z\tZ\4[\t[\4\\\t\\\4]\t]\4^\t^\4_\t_"+
-		"\4`\t`\4a\ta\4b\tb\4c\tc\4d\td\4e\te\4f\tf\4g\tg\4h\th\4i\ti\4j\tj\4k"+
-		"\tk\4l\tl\4m\tm\4n\tn\4o\to\4p\tp\4q\tq\4r\tr\4s\ts\4t\tt\4u\tu\4v\tv"+
-		"\4w\tw\4x\tx\4y\ty\4z\tz\4{\t{\4|\t|\4}\t}\4~\t~\4\177\t\177\4\u0080\t"+
-		"\u0080\3\2\3\2\3\3\3\3\3\4\3\4\3\4\3\4\3\4\3\5\3\5\3\5\3\5\3\5\3\5\3\5"+
-		"\3\5\3\6\3\6\3\6\3\6\3\6\3\6\3\6\3\6\3\6\3\6\3\7\3\7\3\7\3\7\3\7\3\7\3"+
-		"\7\3\7\3\7\3\7\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\t\3\t"+
-		"\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3\n\3\n\3\n\3\n\3\n\3\n\3\n\3\n\3\13\3\13"+
-		"\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\f\3\f\3\f\3\f\3\f"+
-		"\3\f\3\f\3\f\3\f\3\f\3\f\3\f\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3"+
-		"\r\3\16\3\16\3\16\3\16\3\16\3\16\3\16\3\16\3\17\3\17\3\20\3\20\3\21\3"+
-		"\21\3\21\3\21\3\21\3\21\3\22\3\22\3\22\3\22\3\22\3\22\3\22\3\23\3\23\3"+
-		"\23\3\23\3\23\3\23\3\24\3\24\3\24\3\24\3\24\3\25\3\25\3\25\3\25\3\25\3"+
-		"\25\3\26\3\26\3\26\3\26\3\26\3\27\3\27\3\27\3\27\3\27\3\27\3\30\3\30\3"+
-		"\30\3\30\3\31\3\31\3\31\3\31\3\31\3\31\3\32\3\32\3\32\3\32\3\32\3\32\3"+
-		"\33\3\33\3\33\3\33\3\33\3\33\3\33\3\34\3\34\3\35\3\35\3\36\3\36\3\36\3"+
-		"\37\3\37\3\37\3 \3 \3 \3!\3!\3!\3\"\3\"\3\"\3\"\3#\3#\3#\3$\3$\3$\3%\3"+
-		"%\3%\3&\3&\3&\3\'\3\'\3\'\3\'\3(\3(\3(\3(\3)\3)\3)\3*\3*\3*\3+\3+\3,\3"+
-		",\3-\3-\3-\3.\3.\3/\3/\3\60\3\60\3\61\3\61\3\61\3\62\3\62\3\62\3\63\3"+
-		"\63\3\64\3\64\3\65\3\65\3\65\3\66\3\66\3\66\3\67\3\67\3\67\38\38\38\3"+
-		"9\39\3:\3:\3;\3;\3<\3<\3<\3=\3=\3=\3=\3=\3>\3>\3>\3>\3?\3?\3?\3@\3@\3"+
-		"@\3@\3A\3A\3A\3A\3B\3B\3C\3C\3D\3D\3D\3E\3E\3F\3F\3F\3F\3F\3F\3F\3G\3"+
-		"G\3G\3G\3G\3G\3H\3H\3H\3H\3H\3H\3H\3H\3H\3I\3I\3J\3J\3K\3K\3L\3L\3M\3"+
-		"M\3M\3N\3N\3N\3O\3O\3O\3P\3P\3P\3Q\3Q\3Q\3R\3R\3R\3S\3S\3S\3T\3T\3T\3"+
-		"U\3U\3U\3U\3U\3V\3V\3V\3V\3V\3V\3W\3W\3W\3W\3W\3X\3X\3X\3X\3Y\3Y\3Y\3"+
-		"Z\3Z\3[\3[\3\\\3\\\3\\\3\\\3\\\3\\\3\\\3]\3]\3]\3]\3]\3]\3]\3]\3]\3^\3"+
-		"^\3^\3^\3^\3^\3_\3_\3_\3`\3`\3`\3`\3`\3a\3a\3a\3a\3a\3a\3b\3b\3b\3b\3"+
-		"b\3b\3c\3c\3c\3c\3c\3c\3d\3d\3d\3d\3d\3e\3e\3e\3e\3e\3e\3f\3f\3f\3f\3"+
-		"f\3f\3g\3g\3g\3g\3g\3g\3h\3h\3h\3h\3h\3h\3h\3i\3i\3i\3i\3i\3i\3j\3j\3"+
-		"j\3j\3j\3j\3j\3k\3k\3k\3k\3k\3k\3l\3l\3l\3l\3l\3l\3m\3m\3m\3m\3n\3n\3"+
-		"n\3o\3o\3o\3o\3o\3o\3p\3p\3p\3p\3p\3p\3p\3q\3q\3q\3q\3q\3q\3r\3r\7r\u02fe"+
-		"\nr\fr\16r\u0301\13r\3r\3r\3r\3r\3s\3s\7s\u0309\ns\fs\16s\u030c\13s\3"+
-		"s\3s\3t\3t\3t\3t\3u\6u\u0315\nu\ru\16u\u0316\3v\3v\7v\u031b\nv\fv\16v"+
-		"\u031e\13v\3w\3w\3w\6w\u0323\nw\rw\16w\u0324\5w\u0327\nw\3x\3x\6x\u032b"+
-		"\nx\rx\16x\u032c\3y\3y\6y\u0331\ny\ry\16y\u0332\3z\3z\3z\5z\u0338\nz\3"+
-		"z\5z\u033b\nz\3{\6{\u033e\n{\r{\16{\u033f\3{\3{\6{\u0344\n{\r{\16{\u0345"+
-		"\5{\u0348\n{\3|\3|\3|\3|\5|\u034e\n|\3}\3}\3}\7}\u0353\n}\f}\16}\u0356"+
-		"\13}\3}\3}\3}\3~\3~\3~\3~\6~\u035f\n~\r~\16~\u0360\3~\3~\3~\3~\3~\3\177"+
-		"\3\177\3\177\5\177\u036b\n\177\3\177\3\177\3\177\3\u0080\3\u0080\3\u0080"+
-		"\3\u0080\3\u0360\2\u0081\3\3\5\4\7\5\t\6\13\7\r\b\17\t\21\n\23\13\25\f"+
-		"\27\r\31\16\33\17\35\20\37\21!\22#\23%\24\'\25)\26+\27-\30/\31\61\32\63"+
-		"\33\65\34\67\359\36;\37= ?!A\"C#E$G%I&K\'M(O)Q*S+U,W-Y.[/]\60_\61a\62"+
-		"c\63e\64g\65i\66k\67m8o9q:s;u<w=y>{?}@\177A\u0081B\u0083C\u0085D\u0087"+
-		"E\u0089F\u008bG\u008dH\u008fI\u0091J\u0093K\u0095L\u0097M\u0099N\u009b"+
-		"O\u009dP\u009fQ\u00a1R\u00a3S\u00a5T\u00a7U\u00a9V\u00abW\u00adX\u00af"+
-		"Y\u00b1Z\u00b3[\u00b5\\\u00b7]\u00b9^\u00bb_\u00bd`\u00bfa\u00c1b\u00c3"+
-		"c\u00c5d\u00c7e\u00c9f\u00cbg\u00cdh\u00cfi\u00d1j\u00d3k\u00d5l\u00d7"+
-		"m\u00d9n\u00dbo\u00ddp\u00dfq\u00e1r\u00e3s\u00e5t\u00e7u\u00e9v\u00eb"+
-		"w\u00edx\u00efy\u00f1z\u00f3{\u00f5\2\u00f7\2\u00f9|\u00fb}\u00fd~\u00ff"+
-		"\177\3\2\n\4\2\f\f\17\17\4\2\13\13\"\"\5\2C\\aac|\6\2\62;C\\aac|\5\2\62"+
-		";CHch\4\2GGgg\4\2--//\6\2\f\f\16\17$$^^\2\u0382\2\3\3\2\2\2\2\5\3\2\2"+
-		"\2\2\7\3\2\2\2\2\t\3\2\2\2\2\13\3\2\2\2\2\r\3\2\2\2\2\17\3\2\2\2\2\21"+
-		"\3\2\2\2\2\23\3\2\2\2\2\25\3\2\2\2\2\27\3\2\2\2\2\31\3\2\2\2\2\33\3\2"+
-		"\2\2\2\35\3\2\2\2\2\37\3\2\2\2\2!\3\2\2\2\2#\3\2\2\2\2%\3\2\2\2\2\'\3"+
-		"\2\2\2\2)\3\2\2\2\2+\3\2\2\2\2-\3\2\2\2\2/\3\2\2\2\2\61\3\2\2\2\2\63\3"+
-		"\2\2\2\2\65\3\2\2\2\2\67\3\2\2\2\29\3\2\2\2\2;\3\2\2\2\2=\3\2\2\2\2?\3"+
-		"\2\2\2\2A\3\2\2\2\2C\3\2\2\2\2E\3\2\2\2\2G\3\2\2\2\2I\3\2\2\2\2K\3\2\2"+
-		"\2\2M\3\2\2\2\2O\3\2\2\2\2Q\3\2\2\2\2S\3\2\2\2\2U\3\2\2\2\2W\3\2\2\2\2"+
-		"Y\3\2\2\2\2[\3\2\2\2\2]\3\2\2\2\2_\3\2\2\2\2a\3\2\2\2\2c\3\2\2\2\2e\3"+
-		"\2\2\2\2g\3\2\2\2\2i\3\2\2\2\2k\3\2\2\2\2m\3\2\2\2\2o\3\2\2\2\2q\3\2\2"+
-		"\2\2s\3\2\2\2\2u\3\2\2\2\2w\3\2\2\2\2y\3\2\2\2\2{\3\2\2\2\2}\3\2\2\2\2"+
-		"\177\3\2\2\2\2\u0081\3\2\2\2\2\u0083\3\2\2\2\2\u0085\3\2\2\2\2\u0087\3"+
-		"\2\2\2\2\u0089\3\2\2\2\2\u008b\3\2\2\2\2\u008d\3\2\2\2\2\u008f\3\2\2\2"+
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+		"\7\177\2\2\u0353\u0354\3\2\2\2\u0354\u0355\b|\5\2\u0355\u00f8\3\2\2\2"+
+		"\u0356\u0359\7)\2\2\u0357\u035a\5\u00f3z\2\u0358\u035a\n\t\2\2\u0359\u0357"+
+		"\3\2\2\2\u0359\u0358\3\2\2\2\u035a\u035b\3\2\2\2\u035b\u035c\7)\2\2\u035c"+
+		"\u035d\b}\6\2\u035d\u00fa\3\2\2\2\u035e\u035f\7B\2\2\u035f\u0360\7|\2"+
+		"\2\u0360\u0361\7r\2\2\u0361\u00fc\3\2\2\2\26\2\u02ee\u02f9\u0305\u030b"+
+		"\u0313\u0315\u0319\u031b\u0321\u0326\u0329\u032e\u0334\u0336\u033c\u0341"+
+		"\u0343\u034f\u0359\7\2\3\2\b\2\2\3{\2\3|\3\3}\4";
 	public static final ATN _ATN =
 		new ATNDeserializer().deserialize(_serializedATN.toCharArray());
 	static {