Starting decoder

This commit is contained in:
neauoire 2023-11-14 20:30:09 -08:00
parent e03918ea3f
commit 964d793199
6 changed files with 88 additions and 16 deletions

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@ -10,12 +10,26 @@ then
fi
# Make c file
cc lz_main.c -o main && ./main
./main # read example.txt, write compressed.bin
# Decoding
$ASM decoder.tal decoder.rom
uxncli decoder.rom compressed.bin decompressed.txt
rm ./main
rm ./compressed.bin
rm ./decompressed.txt
# Encoding
$ASM encoder.tal encoder.rom
uxncli encoder.rom example-small.txt recompressed.bin
# Redecoding
uxncli decoder.rom recompressed.bin redecoded.txt
cat redecoded.txt

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@ -1,8 +1,7 @@
( decompressor )
|10 @Console &vector $2 &read $1 &pad $5 &write $1 &err $1
|a0 @File1 &vector $2 &success $2 &stat $2 &delete $1 &append $1 &name $2 &length $2 &read $2 &write $2
|b0 @File2 &vector $2 &success $2 &stat $2 &delete $1 &append $1 &name $2 &length $2 &read $2 &write $2
|a0 @File &vector $2 &success $2 &stat $2 &delete $1 &append $1 &name $2 &length $2 &read $2 &write $2
|0000
@ -28,9 +27,9 @@
( ;mem pstr #0a18 DEO )
( debug #800e DEO )
( write )
;dst .File1/name DEO2
;mem .ptr LDZ2 SUB2 .File1/length DEO2
;mem .File1/write DEO2
;dst .File/name DEO2
;mem .ptr LDZ2 SUB2 .File/length DEO2
;mem .File/write DEO2
( halt ) #800f DEO
BRK
@ -38,15 +37,15 @@ BRK
@decompress ( str* -- )
;mem .ptr STZ2
.File1/name DEO2
.File/name DEO2
#0001 .input-size STZ2
&stream
.input-size LDZ2 .File1/length DEO2
.input-size LDZ2 .File/length DEO2
;&b
DUP2 .File1/read DEO2
.File1/success DEI2 #0000 EQU2 ?&eof
DUP2 .File/read DEO2
.File/success DEI2 #0000 EQU2 ?&eof
LDA decompress/run
.File1/success DEI2 ORA ?&stream
.File/success DEI2 ORA ?&stream
JMP2r
&eof POP2 JMP2r
@ -65,7 +64,7 @@ JMP2r
( 1 byte )
#00 SWP #0004 ADD2
( offset )
;&b .File1/read DEO2
;&b .File/read DEO2
;&b LDA INC
!do-copy
@ -75,11 +74,11 @@ JMP2r
( hb )
#3f AND
( lb )
#0001 .File1/length DEO2
;&b .File1/read DEO2
#0001 .File/length DEO2
;&b .File/read DEO2
;&b LDA #0004 ADD2
( offset )
;&b .File1/read DEO2
;&b .File/read DEO2
;&b LDA INC
!do-copy
@ -105,9 +104,9 @@ JMP2r
@do-literal ( length* -- )
DUP2 .File1/length DEO2
DUP2 .File/length DEO2
.ptr LDZ2
DUP2 .File1/read DEO2
DUP2 .File/read DEO2
ADD2 .ptr STZ2
JMP2r

58
cli/lz/encoder.tal Normal file
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@ -0,0 +1,58 @@
( decompressor )
|10 @Console &vector $2 &read $1 &pad $5 &write $1 &err $1
|a0 @File &vector $2 &success $2 &stat $2 &delete $1 &append $1 &name $2 &length $2 &read $2 &write $2
|0000
@input-length $2
@src $30
@dst $30
@ptr $1
|0100
(
@|vectors )
@ready-src ( -> ) ;&await .Console/vector DEO2 BRK
&await ( -> ) .Console/read DEI .src skey ?ready-dst BRK
@ready-dst ( -> ) ;&await .Console/vector DEO2 BRK
&await ( -> ) .Console/read DEI .dst skey ?on-ready BRK
@on-ready ( -> )
;src .File/name DEO2
#1000 .File/length DEO2
;history .File/read DEO2
.File/success DEI2 .input-length STZ2
;history pstr #0a18 DEO
( make a file full of literals )
;dst .File/name DEO2
#0002 .File/length DEO2
( make a bunch of literals )
.input-length LDZ2 #0000
&l ( -- )
DUP2 ;history ADD2 LDA ,&b STR
;&literal .File/write DEO2
INC2 GTH2k ?&l
POP2
( halt ) #800f DEO
BRK
&literal 00 &b
(
@|stdlib )
@pstr ( str* -- ) LDAk ?&w POP2 JMP2r &w LDAk #18 DEO INC2 LDAk ?&w POP2 JMP2r
@skey ( key buf -- proc ) OVR #21 LTH ?&eval #00 SWP sput #00 JMP2r &eval POP2 #01 JMP2r
@scap ( str* -- end* ) LDAk ?&w JMP2r &w INC2 LDAk ?&w JMP2r
@sput ( chr str* -- ) scap INC2k #00 ROT ROT STA STA JMP2r
@history $1000
@mem

1
cli/lz/example-small.txt Normal file
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@ -0,0 +1 @@
abcdef

BIN
cli/lz/recompressed.bin Normal file

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BIN
cli/lz/redecoded.txt Normal file

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