mirror of
https://github.com/a2-4am/4cade.git
synced 2024-11-27 08:50:01 +00:00
shave one byte per game(!) and a bit more
This commit is contained in:
Peter Ferrie
parent
f197debcbe
commit
488aaf99c2
@ -379,7 +379,10 @@ CopyDevs
|
||||
!word gGlobalPrefsStore
|
||||
!word -
|
||||
!byte 16
|
||||
+LD16 SRC ; (SRC) points to free space after the OKVS data structure we just created
|
||||
+LD16 SAVE
|
||||
+ST16 PTR
|
||||
jsr stepptr
|
||||
+LD16 PTR ; (PTR) points to free space after the OKVS data structure we just created
|
||||
+ST16 gGamesListStore ; save pointer to free space for next store
|
||||
|
||||
jsr LoadFile ; load games list file into $8200
|
||||
@ -391,6 +394,9 @@ CopyDevs
|
||||
!word -
|
||||
|
||||
!ifndef RELEASE {
|
||||
+LD16 SAVE
|
||||
+ST16 PTR
|
||||
jsr stepptr
|
||||
+READ_ROM_NO_WRITE
|
||||
lda #40
|
||||
sta $21
|
||||
@ -398,9 +404,9 @@ CopyDevs
|
||||
sta $24
|
||||
dec $25
|
||||
jsr $FC22
|
||||
lda SRC+1
|
||||
lda PTR+1
|
||||
jsr $FDDA
|
||||
lda SRC
|
||||
lda PTR
|
||||
jsr $FDDA
|
||||
+READ_RAM1_WRITE_RAM1
|
||||
}
|
||||
|
||||
@ -6,8 +6,8 @@
|
||||
; YE OLDE GRAND UNIFIED MEMORY MAP
|
||||
;
|
||||
; LC RAM BANK 1
|
||||
; D000..E90F - persistent data structures (gGlobalPrefsStore, gGamesListStore)
|
||||
; E92D..FFF1 - main program code
|
||||
; D000..E790 - persistent data structures (gGlobalPrefsStore, gGamesListStore)
|
||||
; E93F..FFF1 - main program code
|
||||
; FFF2..FFF9 - API functions and global constants available for main program
|
||||
; code, prelaunchers, transition effects, &c.
|
||||
; (Wait/UnwaitForVBL, MockingboardStuff, MachineStatus)
|
||||
|
||||
108
src/okvs.a
108
src/okvs.a
@ -1,5 +1,5 @@
|
||||
;license:MIT
|
||||
;(c) 2018-2020 by 4am
|
||||
;(c) 2018-2020 by 4am/qkumba
|
||||
;
|
||||
; Ordered key/value store (6502 compatible)(256+ records compatible)
|
||||
;
|
||||
@ -34,10 +34,10 @@
|
||||
; There is no range checking because this is assembly.
|
||||
|
||||
; All functions take the starting address of the store's data buffer in
|
||||
; memory, so there can be multiple independent stores at one time. The next-
|
||||
; record pointers are actual memory addresses, so stores are not easily
|
||||
; relocatable. append() will happily extend the store's data buffer without
|
||||
; limit. There is no overflow protection because this is assembly.
|
||||
; memory, so there can be multiple independent stores at one time. Only the
|
||||
; size of a record is stored, so stores are easily relocatable. append() will
|
||||
; happily extend the store's data buffer without limit. There is no overflow
|
||||
; protection because this is assembly.
|
||||
;
|
||||
; There is no sort() function.
|
||||
;
|
||||
@ -56,9 +56,9 @@
|
||||
; ...Record...
|
||||
;
|
||||
; Record
|
||||
; +0 next-record pointer (word)
|
||||
; +2 key length
|
||||
; +3 key
|
||||
; +0 record length (including this field)
|
||||
; +1 key length
|
||||
; +2 key
|
||||
; +K+2 value length (actual length, not max length)
|
||||
; +K+3 value
|
||||
; ... filler bytes up to value max length (set at append() time)
|
||||
@ -160,7 +160,7 @@ okvs_append
|
||||
stx SAVE
|
||||
; PTR -> new record
|
||||
; SAVE -> new record
|
||||
jsr incptr2
|
||||
jsr incptr
|
||||
; PTR -> space for new key
|
||||
+LDPARAMPTR 3, SRC ; SRC -> new key to copy
|
||||
ldy #0
|
||||
@ -188,8 +188,8 @@ okvs_append
|
||||
tay
|
||||
lda (SRC),y ; no max, use actual length instead
|
||||
tax
|
||||
inx
|
||||
+ tay
|
||||
+ inx
|
||||
tay
|
||||
- lda (SRC),y
|
||||
sta (PTR),y
|
||||
dey
|
||||
@ -199,27 +199,22 @@ okvs_append
|
||||
txa
|
||||
clc
|
||||
adc PTR
|
||||
sta SRC
|
||||
bcc +
|
||||
inc PTR+1
|
||||
+ lda PTR+1
|
||||
sta SRC+1 ; SRC -> byte after this record
|
||||
+LD16 SAVE
|
||||
+ST16 PTR ; PTR -> this record again
|
||||
ldy #0
|
||||
lda SRC ; update next-record pointer
|
||||
sta (PTR),y
|
||||
iny
|
||||
lda SRC+1
|
||||
sta (PTR),y
|
||||
jsr GetStoreAddress
|
||||
tax
|
||||
lda PTR+1
|
||||
adc #0
|
||||
pha
|
||||
+ jsr GetStoreAddress
|
||||
; PTR -> store
|
||||
ldy #2
|
||||
lda SRC-2,y
|
||||
pla
|
||||
ldy #3
|
||||
sta (PTR),y ; update next-free-space pointer in head
|
||||
iny
|
||||
lda SRC-2,y
|
||||
dey
|
||||
txa
|
||||
sta (PTR),y
|
||||
sec
|
||||
sbc SAVE
|
||||
ldy #0
|
||||
sta (SAVE),y ; set record length
|
||||
rts
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
@ -269,11 +264,12 @@ okvs_get
|
||||
sty KEYLEN
|
||||
@matchRecordLoop
|
||||
+LD16 PTR
|
||||
clc
|
||||
adc #2
|
||||
bcc +
|
||||
iny ; DEST -> key of this record
|
||||
+ +ST16 DEST
|
||||
tax
|
||||
inx
|
||||
bne +
|
||||
iny
|
||||
+ stx DEST ; DEST -> key of this record
|
||||
sty DEST+1
|
||||
ldy #0
|
||||
@matchKeyLoop
|
||||
lda (SRC),y
|
||||
@ -291,7 +287,7 @@ KEYLEN = *+1
|
||||
+LD16 PTR
|
||||
clc
|
||||
rts
|
||||
@next jsr derefptr ; PTR -> next record
|
||||
@next jsr stepptr ; PTR -> next record
|
||||
inc WINDEX
|
||||
bne +
|
||||
inc WINDEX+1
|
||||
@ -305,17 +301,6 @@ KEYLEN = *+1
|
||||
@fail sec
|
||||
rts
|
||||
|
||||
okvs_get_current
|
||||
+ST16 PTR
|
||||
ldy #0
|
||||
lda (PTR),y
|
||||
clc
|
||||
adc PTR
|
||||
sta PTR
|
||||
bcc +
|
||||
inc PTR+1
|
||||
+ jmp incptr
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
; okvs_next
|
||||
; get (N+1)th key, with wraparound
|
||||
@ -362,7 +347,7 @@ okvs_nth
|
||||
+LD16 WINDEX
|
||||
+ST16 SAVE
|
||||
jmp @next
|
||||
- jsr derefptr
|
||||
- jsr stepptr
|
||||
@next
|
||||
lda SAVE
|
||||
dec SAVE
|
||||
@ -372,7 +357,7 @@ okvs_nth
|
||||
dec SAVE+1
|
||||
tay
|
||||
bne -
|
||||
jsr incptr2
|
||||
jsr incptr
|
||||
+LD16 PTR
|
||||
ldx #0
|
||||
rts
|
||||
@ -467,13 +452,13 @@ okvs_iter_values
|
||||
sta WINDEX
|
||||
sta WINDEX+1
|
||||
@loop
|
||||
lda #2 ; for iter, skip length = 2
|
||||
lda #1 ; for iter, skip length = 1
|
||||
@branch bne + ; SMC (iter_values puts a BIT here, so no branch)
|
||||
; for iter_values, skip length = length(key) + 2 + 1
|
||||
tay ;;ldy #2
|
||||
; for iter_values, skip length = length(key) + 1 + 1
|
||||
tay ;;ldy #1
|
||||
lda (PTR),y ; A = length of key
|
||||
clc
|
||||
adc #3 ; skip over pointer to next record (2 bytes) + key length (1 byte)
|
||||
adc #2 ; skip over record length (1 byte) + key length (1 byte)
|
||||
+ sta @skiplen
|
||||
lda WCOUNT+1 ; save WCOUNT on stack
|
||||
pha
|
||||
@ -508,7 +493,7 @@ okvs_iter_values
|
||||
sta WCOUNT
|
||||
pla
|
||||
sta WCOUNT+1
|
||||
jsr derefptr ; PTR -> next record
|
||||
jsr stepptr ; PTR -> next record
|
||||
inc WINDEX
|
||||
bne +
|
||||
inc WINDEX+1
|
||||
@ -524,6 +509,11 @@ okvs_iter_values
|
||||
;------------------------------------------------------------------------------
|
||||
; internal functions
|
||||
|
||||
okvs_get_current
|
||||
+ST16 PTR
|
||||
jsr stepptr
|
||||
bne incptr
|
||||
|
||||
incptr4 jsr incptr2
|
||||
incptr2 jsr incptr
|
||||
incptr
|
||||
@ -560,3 +550,15 @@ derefptr
|
||||
pla
|
||||
sta PTR+1
|
||||
rts
|
||||
|
||||
stepptr
|
||||
; out: Y = 0
|
||||
; preserves X
|
||||
ldy #0
|
||||
lda (PTR),y
|
||||
clc
|
||||
adc PTR
|
||||
sta PTR
|
||||
bcc +
|
||||
inc PTR+1
|
||||
+ rts
|
||||
|
||||
Loading…
Reference in New Issue
Block a user