mirror of
https://github.com/a2-4am/4cade.git
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223 lines
6.4 KiB
Plaintext
223 lines
6.4 KiB
Plaintext
;license:MIT
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;(c) 2018-2020 by 4am
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;
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; Parser for global preferences file
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;
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; Public functions
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; - pref_get
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; - pref_set
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; - SaveSmallFile
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;
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; Public constants (all length-prefixed strings)
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; - kNextAttract
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; - kNextFX
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; - kNextDFX
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; - kCheat
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;
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kGlobalPrefsBuffer = $8000
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; valid pref keys
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kNextAttract
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!byte 11
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!raw "NEXTATTRACT"
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kNextFX
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!byte 6
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!raw "NEXTFX"
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kNextDFX
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!byte 7
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!raw "NEXTDFX"
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kCheat
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!byte 5
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!raw "CHEAT"
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.kEquals !byte 1
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!raw "="
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.kLF !byte 1,$0A
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.kFluff1 !byte .kFluff2-*-1
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!raw "# Total Replay preferences file",$0A
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!raw "# Do not edit by hand.",$0A
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!raw "# Or do. I'm a comment, not a cop.",$0A
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!byte $0A
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!raw "# value=module listed in ATTRACT.CONF",$0A
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.kFluff2 !byte .kFluff3-*-1
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!byte $0A
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!raw "# value=effect listed in FX.CONF",$0A
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.kFluff3 !byte .kFluff4-*-1
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!byte $0A
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!raw "# value=effect listed in DFX.CONF",$0A
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.kFluff4 !byte .kEOF-*-1
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!byte $0A
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!raw "# value=0 or 1",$0A
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.kEOF !byte ._-*-1
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!byte $0A
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!raw "[eof]",$0A
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._
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.addStringFromStore
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+ST16 .key
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jsr .addString
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+LDADDR .kEquals
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jsr .addString
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jsr okvs_get
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!word gGlobalPrefsStore
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.key !word $FDFD ; SMC
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jsr .addString
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+LDADDR .kLF
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; execution falls through here
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.addString
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+ST16 $00
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ldy #0
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lda ($00),y
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beq PREFRTS
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tay
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clc
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adc $FE
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tax
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- lda ($00),y
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dey
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sta ($FE),y
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bne -
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stx $FE
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bcc PREFRTS
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inc $FF
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PREFRTS rts
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;------------------------------------------------------------------------------
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; pref_get
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; get pref value by pref key, and optionally validate that the pref value
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; exists as a key in another OKVS
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;
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; example usage:
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; jsr pref_get
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; !word kNextFX
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; !word gFXStore
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;
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; See above for list of valid pref keys.
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;
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; The OKVS you pass in as the second parameter must have at least 1 record.
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; This is not checked.
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;
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; in: stack contains 4 bytes of parameters:
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; +1 [word] address of length-prefixed pref key
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; +3 [word] address of OKVS, or 0
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; gGlobalPrefsStore must be initialized (this is done in 4cade.init)
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; out: A/Y = address of pref value
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; $WINDEX = index of pref value in passed store
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; (if OKVS parameter is 0, no validation occurs and X=0 and Z=1 on exit,
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; some callers rely on this behavior, so don't change it!)
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; PARAM clobbered
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; PTR clobbered
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; SRC clobbered
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; SAVE clobbered
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;------------------------------------------------------------------------------
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pref_get
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+PARAMS_ON_STACK 4
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+LDPARAMPTR 1, +
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+LDPARAMPTR 3, .store1
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jsr okvs_get ; look up pref key in prefs store
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!word gGlobalPrefsStore
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+ !word $FDFD ; SMC
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bcs .useDefaultValue ; if pref key is not found, use default value
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ldx .store1+1
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beq PREFRTS ; if no OKVS to validate against, we're done
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+ST16 +
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+ST16 PTR
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ldy #0
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lda (PTR),y
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beq .useDefaultValue ; if pref value is empty, use default value
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jsr okvs_get ; check whether the pref value exists as a key in the passed-in store
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.store1 !word $FDFD ; SMC
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+ !word $FDFD ; SMC
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bcc + ; found key, continue
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.useDefaultValue ; did not find key, use first key in passed store as a default value
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sta WINDEX
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sta WINDEX+1
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+
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+LD16 .store1
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jmp okvs_nth
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;------------------------------------------------------------------------------
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; pref_set
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; set pref value by pref key, serialize prefs, and write them to disk
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;
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; in: stack contains 4 bytes of parameters:
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; +1 [word] address of length-prefixed pref key
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; +3 [word] address of length-prefixed pref value
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; out: all registers and flags clobbered
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; PARAM clobbered
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; PTR clobbered
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; SRC clobbered
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; $FE/$FF clobbered
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;------------------------------------------------------------------------------
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pref_set
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+PARAMS_ON_STACK 4
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+LDPARAMPTR 1, +
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+LDPARAMPTR 3, ++
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jsr okvs_update ; save that in prefs store
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!word gGlobalPrefsStore
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+ !word $FDFD ; SMC
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++ !word $FDFD ; SMC
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+LDADDR kGlobalPrefsBuffer ; clear prefs buffer
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+ST16 $FE
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ldx #$02
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ldy #$00
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tya
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- sta ($FE),y
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iny
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bne -
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inc $FF
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dex
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bne -
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dec $FF
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dec $FF
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+LDADDR .kFluff1 ; serialize prefs into prefs buffer
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jsr .addString
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+LDADDR kNextAttract
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jsr .addStringFromStore
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+LDADDR .kFluff2
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jsr .addString
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+LDADDR kNextFX
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jsr .addStringFromStore
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+LDADDR .kFluff3
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jsr .addString
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+LDADDR kNextDFX
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jsr .addStringFromStore
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+LDADDR .kFluff4
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jsr .addString
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+LDADDR kCheat
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jsr .addStringFromStore
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+LDADDR .kEOF
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jsr .addString
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+LDADDR kGlobalPrefsFilename ; write prefs buffer to file on disk
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jsr SetPath
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+LD16 kGlobalPrefsBuffer
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; /!\ execution falls through here to glue.prorwts/SaveSmallFile
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;------------------------------------------------------------------------------
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; SaveSmallFile
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; Save a file into memory all at once, using ProRWTS2.
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; /!\ Only first block (512 bytes) is written. Keep those files small. /!\
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; /!\ All 512 bytes are written to disk. Clear buffer before calling. /!\
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;
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; supports paths, see note
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;
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; in: A/Y points to data buffer
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; gPathname contains path+filename to write
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; out: all flags clobbered
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; all registers clobbered
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;------------------------------------------------------------------------------
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SaveSmallFile
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+ST16 ldrlo ; set data buffer address for ProRWTS2
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jsr SwitchToBank2
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jsr SaveSmallFileInternal
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jmp SwitchToBank1
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