mirror of https://git.sr.ht/~rabbits/uxn
156 lines
3.2 KiB
Tal
156 lines
3.2 KiB
Tal
( thue interpreter
|
|
usage: thue.rom demo.t )
|
|
|
|
|10 @Console &vector $2 &read $1 &pad $5 &write $1
|
|
|a0 @File &vector $2 &success $2 &stat $2 &delete $1 &append $1 &name $2 &length $2 &read $2 &write $2
|
|
|
|
|0000
|
|
|
|
@src $40
|
|
@ptr $2
|
|
@len $2
|
|
|
|
|0100 ( -> )
|
|
|
|
;on-console .Console/vector DEO2
|
|
|
|
BRK
|
|
|
|
@on-console ( -> )
|
|
|
|
;src STH2
|
|
|
|
( read )
|
|
.Console/read DEI
|
|
DUP #20 LTH OVR #7f GTH ORA ,&end JCN
|
|
STH2kr ;slen JSR2 #003f GTH2 ,&end JCN
|
|
STH2r ;sput JSR2 BRK
|
|
&end
|
|
POP
|
|
|
|
( parse )
|
|
STH2r .File/name DEO2
|
|
#0001 .File/length DEO2
|
|
;program .ptr STZ2
|
|
&s
|
|
;&buf .File/read DEO2
|
|
.File/success DEI2 #0000 EQU2 ,&eof JCN
|
|
[ LIT &buf $1 ] ;walk JSR2
|
|
,&s JMP
|
|
&eof
|
|
|
|
( assemble )
|
|
;program/assembly .ptr STZ2
|
|
;program
|
|
&w
|
|
( save ) DUP2 .ptr LDZ2 STA2
|
|
( incr ) .ptr LDZ2k INC2 INC2 ROT STZ2
|
|
( next ) &eos INC2 LDAk ,&eos JCN INC2
|
|
LDAk ,&w JCN
|
|
|
|
( save acc )
|
|
INC2 ;program/accumulator ;scpy JSR2
|
|
|
|
( run )
|
|
&eval ,step JSR ,&eval JCN
|
|
#010f DEO
|
|
|
|
BRK
|
|
|
|
@step ( -- done )
|
|
|
|
;program/assembly
|
|
&while
|
|
DUP2 ;run-rule JSR2 ,&found JCN
|
|
#0004 ADD2 LDA2k ORA ,&while JCN
|
|
POP2
|
|
#00
|
|
|
|
JMP2r
|
|
&found #01 JMP2r
|
|
|
|
@walk ( char -- )
|
|
|
|
.ptr LDZ2 STA
|
|
|
|
( check for left-side )
|
|
.ptr LDZ2 #0002 SUB2 ;&marker ;scmp JSR2 #01 NEQ ,&no-marker JCN
|
|
#00 .ptr LDZ2 #0002 SUB2 STA
|
|
.ptr LDZ2k #0002 SUB2 ROT STZ2
|
|
.len LDZ2k INC2 ROT STZ2
|
|
&no-marker
|
|
( check for right-side )
|
|
.ptr LDZ2 LDA #0a NEQ ,&no-lb JCN
|
|
#00 .ptr LDZ2 STA
|
|
&no-lb
|
|
.ptr LDZ2k INC2 ROT STZ2
|
|
|
|
JMP2r
|
|
&marker "::= $1
|
|
|
|
@run-rule ( rule* -- )
|
|
|
|
LDA2k ,&a STR2
|
|
INC2 INC2 LDA2 ,&b STR2
|
|
|
|
;program/accumulator
|
|
&w
|
|
[ LIT2 &a $2 ] OVR2 ;sseg JSR2 #01 NEQ ,&no-found JCN
|
|
,&b LDR2 LDA LIT "~ EQU ,&output JCN
|
|
( shift ) DUP2 [ ,&b LDR2 ;slen JSR2 ,&a LDR2 ;slen JSR2 SUB2 ] ;ssft JSR2
|
|
( write ) [ LIT2 &b $2 ] SWP2 OVR2 ;slen JSR2 ;mcpy JSR2
|
|
POP2 #01 JMP2r
|
|
&no-found
|
|
INC2 LDAk ,&w JCN
|
|
POP2
|
|
#00
|
|
|
|
JMP2r
|
|
&output
|
|
,&a LDR2 ;slen JSR2 #0000 SWP2 SUB2 ;ssft JSR2
|
|
POP2 ,&b LDR2 INC2
|
|
LDAk LIT "` NEQ ,&no-lb JCN
|
|
#0a18 DEO #01 JMP2r
|
|
&no-lb
|
|
,print-str JSR #01
|
|
JMP2r
|
|
|
|
@print-str ( str* -- )
|
|
|
|
&while
|
|
LDAk #18 DEO
|
|
INC2 LDAk ,&while JCN
|
|
POP2
|
|
|
|
JMP2r
|
|
|
|
@ssft ( str* len* -- )
|
|
|
|
STH2 DUP2k ;slen JSR2 ADD2 STH2r
|
|
DUP2 #8000 GTH2 ,&l JCN
|
|
ORAk ,&r JCN
|
|
POP2 POP2 POP2
|
|
|
|
JMP2r
|
|
&l #8000 SWP2 SUB2 #8000 ADD2 ,msfl JSR JMP2r
|
|
&r ,msfr JSR JMP2r
|
|
|
|
( stdlib )
|
|
|
|
@mcpy ( src* dst* len* -- ) SWP2 STH2 OVR2 ADD2 SWP2 &l LDAk STH2kr STA INC2r INC2 GTH2k ,&l JCN POP2 POP2 POP2r JMP2r
|
|
@msfl ( b* a* len* -- ) STH2 SWP2 EQU2k ,&e JCN &l DUP2k STH2kr ADD2 LDA ROT ROT STA INC2 GTH2k ,&l JCN POP2 POP2 &e POP2r JMP2r
|
|
@msfr ( b* a* len* -- ) STH2 EQU2k ,&e JCN &l DUP2 LDAk ROT ROT STH2kr ADD2 STA #0001 SUB2 LTH2k ,&l JCN POP2 POP2 &e POP2r JMP2r
|
|
|
|
@scap ( str* -- end* ) LDAk #00 NEQ JMP JMP2r &w INC2 LDAk ,&w JCN JMP2r
|
|
@sput ( chr str* -- ) ,scap JSR STA JMP2r
|
|
@slen ( str* -- len* ) DUP2 ,scap JSR SWP2 SUB2 JMP2r
|
|
@scpy ( src* dst* -- ) STH2 &w LDAk STH2kr STA INC2r INC2 LDAk ,&w JCN POP2 #00 STH2r STA JMP2r
|
|
@scmp ( a* b* -- f ) STH2 &l LDAk LDAkr STHr ANDk #00 EQU ,&e JCN NEQk ,&e JCN POP2 INC2 INC2r ,&l JMP &e NIP2 POP2r EQU JMP2r
|
|
@sseg ( a* b* -- f ) STH2 &l LDAk LDAkr STHr NEQ ,&e JCN INC2k LDA #00 EQU ,&e JCN INC2 INC2r ,&l JMP &e LDA LDAr STHr EQU JMP2r
|
|
|
|
$10
|
|
|
|
@program $4000
|
|
&assembly $4000
|
|
&accumulator $4000
|