uxn-utils/cli/lz/ulzenc.tal

( ulz encoder )

|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

	@src $30
	@dst $30
	@ptr $1

|0100

@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 ( -> )
	( | load raw )
	;src .File/name DEO2
	#4000 .File/length DEO2
	;raw .File/read DEO2
	;raw .File/success DEI2 uxn_lz_compress
	( halt ) #800f DEO
	BRK

@uxn_lz_compress ( input* length* -- )
	ADD2k NIP2 SWP2
	&w ( -- )
		( | get available dictionary size )
		DUP2 ;raw SUB2 #0100 LTH2k ?{ SWP2 }
		POP2 ,&dict-len STR2
		( | size of the string to search for )
		SUB2k #3fff #0004 ADD2 LTH2k ?{ SWP2 }
		POP2 ,&string-len STR2
		( | itterate through the dictionary )
		[ LIT2 &dict-len $2 ] phex #2018 DEO
		[ LIT2 &string-len $2 ] phex #0a18 DEO
		( TODO: remove me!! ) INC2 NEQ2k ?&w
	JMP2r

(
@|stdlib )

@skey ( key buf -- proc )
	OVR #21 LTH ?&eval
	#00 SWP sput #00 JMP2r
	&eval POP2 #01 JMP2r

@scap ( str* -- end* )
	&w INC2 & LDAk ?&w
	JMP2r

@sput ( chr str* -- )
	scap/ INC2k #00 ROT ROT STA
	STA
	JMP2r

@getc ( -- b )
	#0001 .File/length DEO2
	;&b .File/read DEO2
	[ LIT &b $1 ] JMP2r

@phex ( short* -- )
	SWP phex/b
	&b ( -- )
		DUP #04 SFT phex/c
	&c ( -- )
		#0f AND DUP #09 GTH #27 MUL ADD [ LIT "0 ] ADD #18 DEO
		JMP2r
	
(
@|memory )

@raw $4000

@compressed $4000