mirror of
https://github.com/blondie7575/WeeGUI.git
synced 2024-06-11 22:29:27 +00:00
5202ddbeb7
Views, buttons, and checkboxes can now all use Applesoft string variables in their title parameters. Hardcoded literals still work as well. Also generalized the string pool allocator and added support for allocating pascal strings.
239 lines
4.0 KiB
ArmAsm
239 lines
4.0 KiB
ArmAsm
;
|
|
; utility.s
|
|
; General utilities for 6502
|
|
;
|
|
; Created by Quinn Dunki on 8/15/14.
|
|
; Copyright (c) 2014 One Girl, One Laptop Productions. All rights reserved.
|
|
;
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; delayShort
|
|
; Sleeps for ~1/30th second
|
|
;
|
|
delayShort:
|
|
SAVE_AXY
|
|
|
|
ldy #$06 ; Loop a bit
|
|
delayShortOuter:
|
|
ldx #$ff
|
|
delayShortInner:
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
dex
|
|
bne delayShortInner
|
|
dey
|
|
bne delayShortOuter
|
|
|
|
RESTORE_AXY
|
|
rts
|
|
|
|
.if 0
|
|
;;;;;;;;;;;;;;;;;;;;;;;
|
|
; scanHexDigit
|
|
; Scans a 4 bit hex value from an ASCII character
|
|
; A: ASCII character
|
|
; Out A: Hex value
|
|
;
|
|
scanHexDigit:
|
|
cmp #'a'
|
|
bcs scanHexDigitLowCase
|
|
cmp #'A'
|
|
bcs scanHexDigitLetter
|
|
sec
|
|
sbc #'0'
|
|
jmp scanHexDigitDone
|
|
|
|
scanHexDigitLowCase:
|
|
sec
|
|
sbc #32
|
|
|
|
scanHexDigitLetter:
|
|
sec
|
|
sbc #55
|
|
|
|
scanHexDigitDone:
|
|
rts
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;
|
|
; scanHex8
|
|
; Scans an 8 bit hex value from a string
|
|
; PARAM0: Pointer to string (LSB)
|
|
; PARAM1: Pointer to string (MSB)
|
|
; Y: Offset into string
|
|
; Out A: 8-bit hex value
|
|
; Y: One past what we scanned
|
|
; Side effects: Clobbers S0
|
|
;
|
|
scanHex8:
|
|
lda (PARAM0),y
|
|
jsr scanHexDigit
|
|
asl
|
|
asl
|
|
asl
|
|
asl
|
|
sta SCRATCH0 ; Stash first digit for later
|
|
|
|
iny
|
|
lda (PARAM0),y
|
|
jsr scanHexDigit
|
|
ora SCRATCH0
|
|
iny ; Be nice and advance Y to end
|
|
rts
|
|
.endif
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; WGStrLen
|
|
; Finds the length of a null-terminated string
|
|
; PARAM0: String pointer, LSB
|
|
; PARAM1: String pointer, MSB
|
|
; Return: A: String length, not including null
|
|
;
|
|
WGStrLen:
|
|
phy
|
|
|
|
ldy #0
|
|
WGStrLen_loop:
|
|
lda (PARAM0),y
|
|
beq WGStrLen_done
|
|
iny
|
|
bra WGStrLen_loop
|
|
|
|
WGStrLen_done:
|
|
tya
|
|
ply
|
|
rts
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; WGAllocStr
|
|
; Finds room in our block string allocator
|
|
; Return: PARAM0: Stored string, LSB
|
|
; PARAM1: Stored string, MSB
|
|
; Null if pool is full
|
|
; X: Pool index of free space
|
|
; Side Effects: Clobbers AX
|
|
;
|
|
WGAllocStr:
|
|
ldx #0
|
|
|
|
WGAllocStr_findEmptyLoop:
|
|
lda WG_STRINGS,x
|
|
beq WGAllocStr_done
|
|
txa
|
|
clc
|
|
adc #16 ; String blocks are 16 bytes wide
|
|
bcs WGAllocStr_noRoom
|
|
tax
|
|
bra WGAllocStr_findEmptyLoop
|
|
|
|
WGAllocStr_noRoom:
|
|
lda #0
|
|
sta PARAM0
|
|
sta PARAM1
|
|
|
|
WGAllocStr_done:
|
|
rts
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; WGStoreStr
|
|
; Finds room in our block allocator and copies the given string.
|
|
; A: Terminator character
|
|
; PARAM0: String pointer, LSB
|
|
; PARAM1: String pointer, MSB
|
|
; Return: PARAM0: Stored string, LSB
|
|
; PARAM1: Stored string, MSB
|
|
; Side Effects: Clobbers SA
|
|
;
|
|
WGStoreStr:
|
|
sta WG_SCRATCHA
|
|
SAVE_AXY
|
|
|
|
jsr WGAllocStr
|
|
lda PARAM1
|
|
beq WGStoreStr_done
|
|
ldy #0
|
|
|
|
phx ; Remember the start of our string
|
|
|
|
WGStoreStr_copyLoop:
|
|
lda (PARAM0),y
|
|
cmp WG_SCRATCHA
|
|
beq WGStoreStr_terminate
|
|
sta WG_STRINGS,x
|
|
inx
|
|
iny
|
|
cpy #15 ; Clip string to maximum block size
|
|
bne WGStoreStr_copyLoop
|
|
|
|
WGStoreStr_terminate:
|
|
lda #0 ; Terminate the stored string
|
|
sta WG_STRINGS,x
|
|
|
|
pla ; Return pointer to the start of the block
|
|
clc
|
|
adc #<WG_STRINGS
|
|
sta PARAM0
|
|
lda #0
|
|
adc #>WG_STRINGS
|
|
sta PARAM1
|
|
|
|
WGStoreStr_done:
|
|
RESTORE_AXY
|
|
rts
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; WGStorePascalStr
|
|
; Finds room in our block allocator and copies the given string.
|
|
; X: Length
|
|
; PARAM0: String pointer, LSB
|
|
; PARAM1: String pointer, MSB
|
|
; Return: PARAM0: Stored string, LSB
|
|
; PARAM1: Stored string, MSB
|
|
; Side Effects: Clobbers SA
|
|
;
|
|
WGStorePascalStr:
|
|
stx WG_SCRATCHA
|
|
SAVE_AXY
|
|
|
|
jsr WGAllocStr
|
|
lda PARAM1
|
|
beq WGStorePascalStr_done
|
|
ldy #0
|
|
|
|
phx ; Remember the start of our string
|
|
|
|
WGStorePascalStr_copyLoop:
|
|
cpy WG_SCRATCHA
|
|
beq WGStorePascalStr_terminate
|
|
lda (PARAM0),y
|
|
sta WG_STRINGS,x
|
|
inx
|
|
iny
|
|
cpy #15 ; Clip string to maximum block size
|
|
bne WGStorePascalStr_copyLoop
|
|
|
|
WGStorePascalStr_terminate:
|
|
lda #0 ; Terminate the stored string
|
|
sta WG_STRINGS,x
|
|
|
|
pla ; Return pointer to the start of the block
|
|
clc
|
|
adc #<WG_STRINGS
|
|
sta PARAM0
|
|
lda #0
|
|
adc #>WG_STRINGS
|
|
sta PARAM1
|
|
|
|
WGStorePascalStr_done:
|
|
RESTORE_AXY
|
|
rts
|