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tar listing is working

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~d6 2024-09-14 20:41:13 -04:00
parent 4b643ea646
commit a206871a07
1 changed files with 180 additions and 96 deletions
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tar.tal
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@ -3,18 +3,26 @@
( by d_m ) ( by d_m )
( ) ( )
( currently only supports listing the contents of tar files ) ( currently only supports listing the contents of tar files )
( )
( see https://en.wikipedia.org/wiki/Tar_(computing)#UStar_format )
( File1 is used to read the tar file ) ( File1 is used to read the tar file )
( File2 is used to write files and directories ) ( TODO File2 is used to write files and directories )
|a0 @File1 [ &vec $2 &ok $2 &stat $2 &del $1 &append $1 &name $2 &len $2 &r $2 &w $2 ] |a0 @File1 [ &vec $2 &ok $2 &stat $2 &del $1 &append $1 &name $2 &len $2 &r $2 &w $2 ]
|b0 @File2 [ &vec $2 &ok $2 &stat $2 &del $1 &append $1 &name $2 &len $2 &r $2 &w $2 ] |b0 @File2 [ &vec $2 &ok $2 &stat $2 &del $1 &append $1 &name $2 &len $2 &r $2 &w $2 ]
|0100 |0100
;arg-callback ;on-stdin arg/init BRK ;arg-callback ;on-stdin arg/init BRK
( exit normally )
@exit ( code^ -> BRK ) @exit ( code^ -> BRK )
#80 ORA #0f DEO BRK #80 ORA #0f DEO BRK
( exit abnormally )
@panic ( -> $exit )
#010e DEO #010f DEO BRK
( handle all provided command-line arguments )
@arg-callback ( -> ) @arg-callback ( -> )
;arg/count LDA ;arg/count LDA
DUP #00 EQU ?&missing DUP #00 EQU ?&missing
@ -24,102 +32,104 @@
&toomany ;too-many-arguments &toomany ;too-many-arguments
&error print ;usage print #01 !exit &error print ;usage print #01 !exit
@run ( -> ) ( run the program )
#00 arg/read .File1/name DEO2 list #00 !exit @run ( -> BRK )
#00 arg/read .File1/name DEO2 list-entries #00 !exit
@on-stdin ( -> BRK ) BRK ( ignore stdin once we've processed the args )
@on-stdin ( -> BRK )
@usage "usage: 20 "uxncli 20 "tar.rom 20 "FILENAME 0a 00 BRK
@missing-filename "error: 20 "missing 20 "filename 0a 00
@too-many-arguments "error: 20 "too 20 "many 20 "arguments 0a 00
@unsupported "unsupported 20 "format 20 00
@panic ( -> $exit )
#010e DEO #010f DEO BRK
( print a null-terminated string )
@print ( s* -> ) @print ( s* -> )
&loop LDAk #00 EQU ,&eof JCN &loop LDAk ?{ POP2 JMP2r }
LDAk #18 DEO INC2 ,&loop JMP LDAk #18 DEO INC2 !&loop
&eof POP2 JMP2r
( print up to `len` bytes from string. stops on NUL. )
@lprint ( s* len* -> )
OVR2 ADD2 SWP2 ( limit* s* )
&loop LDAk ?{ !&done } ( limit* s*)
LDAk #18 DEO INC2 GTH2k ?&loop ( limit* s+1* )
&done POP2 POP2 JMP2r ( )
( read 512 bytes of header for the next tar entry. )
( assumes .File1/name is already set. )
@read-header ( -> ok^ ) @read-header ( -> ok^ )
( assume .File1/name was already written )
#0200 .File1/len DEO2 #0200 .File1/len DEO2
;header .File1/r DEO2 ;header .File1/r DEO2
( TODO validate checksum )
.File1/ok DEI2 #0200 EQU2 JMP2r .File1/ok DEI2 #0200 EQU2 JMP2r
@list ( -> ) ( list all the entries in the tar archive )
read-header ?&ok JMP2r &ok @list-entries ( -> )
( dump-header ) read-header ?{ JMP2r }
;header/filename LDA ?&non-null ;header/filename LDA ?&non-null
#800f DEO BRK #800f DEO BRK
&non-null &non-null
;header/type LDA ( type^ ) ;header/type LDA ( type^ )
DUP #00 EQU ?list-file-v ( ) DUP #00 EQU ?list-file-v ( type^ )
DUP LIT "0 EQU ?list-file-v ( ) DUP LIT "0 EQU ?list-file-v ( type^ )
DUP LIT "5 EQU ?list-dir-v ( ) DUP LIT "5 EQU ?list-dir-v ( type^ )
DUP LIT "7 EQU ?list-file-v ( type^ )
!list-unsupported ( ) !list-unsupported ( )
( non-verbose file entry listing )
@list-file ( 00^ -> ) @list-file ( 00^ -> )
POP POP
LIT "f #18 DEO #2018 DEO LIT "f #18 DEO #2018 DEO
;header/filename print #0a18 DEO ;header/filename #0064 lprint #0a18 DEO
;header/size load-octal11 round-up-to-512 skip !list ;header/size load-octal11 round-up-to-512 skip !list-entries
( non-verbose directory entry listing )
@list-dir ( 00^ -> ) @list-dir ( 00^ -> )
POP POP
LIT "d #18 DEO #2018 DEO LIT "d #18 DEO #2018 DEO
;header/filename print #0a18 DEO ;header/filename #0064 lprint #0a18 DEO
!list !list-entries
( verbose file entry listing )
@list-file-v ( 00^ -> ) @list-file-v ( 00^ -> )
POP POP
LIT "f #18 DEO #2018 DEO LIT "f #18 DEO #2018 DEO
( ;header/mode #0008 dump-mem0 )
( ;header/owner #0008 dump-mem0 )
( ;header/group #0008 dump-mem0 )
( ;header/size #000b dump-mem0 )
( ;header/mtime #000b dump-mem0 )
;header/size load-octal11 dump-longer #2018 DEO ;header/size load-octal11 dump-longer #2018 DEO
;header/filename print #0a18 DEO ;header/filename #0064 lprint #0a18 DEO
;header/size load-octal11 round-up-to-512 skip !list ;header/size load-octal11 round-up-to-512 skip !list-entries
( verbose directory entry listing )
@list-dir-v ( 00^ -> ) @list-dir-v ( 00^ -> )
POP POP
LIT "d #18 DEO #2018 DEO LIT "d #18 DEO #2018 DEO
( ;header/mode #0008 dump-mem0 )
( ;header/owner #0008 dump-mem0 )
( ;header/group #0008 dump-mem0 )
( ;header/size #000b dump-mem0 )
( ;header/mtime #000b dump-mem0 )
;header/size load-octal11 dump-longer #2018 DEO ;header/size load-octal11 dump-longer #2018 DEO
;header/filename print #0a18 DEO ;header/filename #0064 lprint #0a18 DEO
!list !list-entries
( handle unsupported directory entry listing )
@list-unsupported ( type^ -> ) @list-unsupported ( type^ -> )
;unsupported print emit/byte #0a18 DEO !panic ;unsupported print DUP emit/byte #2018 DEO
!list LIT2 "[ 18 DEO #18 DEO LIT2 "] 18 DEO
#0a18 DEO
dump-header !panic
( write data from memory into the tar file ) ( TODO write data from memory into the tar file )
@write-memory ( filename* size* data* -> ) @write-memory ( filename* size* data* -> )
STH2 STH2k write-file-header ( [data* size*] ) STH2 STH2k write-file-header ( [data* size*] )
STH2r STH2r write-file-body JMP2r ( ) STH2r STH2r write-file-body JMP2r ( )
.File1/len .File1/len
( TODO write out the file header )
@write-file-header ( filename* size* -> ) @write-file-header ( filename* size* -> )
SWP2 ;header/filename copy JMP2r SWP2 ;header/filename copy JMP2r
write-size-2 write-size-2
( TODO: checksum ) ( TODO: compute checksum )
LIT "0 ;header/type STA LIT "0 ;header/type STA
#00 ;header/linkname STA #00 ;header/linkname STA
JMP2r JMP2r
( TODO write file body into archive )
@write-file-body ( size* data* -> ) @write-file-body ( size* data* -> )
SWP2 .File1/len DEO2 .File1/w DEO2 JMP2r SWP2 .File1/len DEO2 .File1/w DEO2 JMP2r
@mod ( x* y* -> x%y* ) ( TODO write file size, limited to 64k )
DIV2k MUL2 SUB2 JMP2r
@write-size-2 ( size* -> ) @write-size-2 ( size* -> )
;header/size STH2 ( size* [start*] ) ;header/size STH2 ( size* [start*] )
LIT2r 000a ADD2r ( size* [start* last*] ) LIT2r 000a ADD2r ( size* [start* last*] )
@ -133,6 +143,8 @@
&done ( zero* [start* pos*] ) &done ( zero* [start* pos*] )
POP2 POP2r POP2r JMP2r ( ) POP2 POP2r POP2r JMP2r ( )
( TODO: copy string from src to dst )
( TODO: need a length param too )
@copy ( src* dst* -> ) @copy ( src* dst* -> )
STH2 STH2
&loop &loop
@ -140,32 +152,44 @@
POP2 POP2r JMP2r POP2 POP2r JMP2r
&ok INC2 INC2r !&loop &ok INC2 INC2r !&loop
@read-error "error 20 "reading 20 "data 0a 00 ( skips `n` bytes forward in File1, specified as a 5-byte integer )
( )
( skips n bytes, specified as a 5-byte integer ) ( since we can only actually read 32k at a time, and since we can )
( only easily work with 2-byte shorts, we first read the lowest )
( two bytes and skip that much. then, for the higher byte, we can )
( do two skips of 32k for each unit found. )
@skip ( carry^ hi* lo* -> ) @skip ( carry^ hi* lo* -> )
skip-lo ( carry^ hi* ) skip-lo ( carry^ hi* )
skip-hi ( carry^ ) skip-hi ( carry^ )
?skip-4g JMP2r ( ) ?skip-4g JMP2r ( )
@skip-4g ( -> ) skip-2g ( fall-through ) ( unconditionally skip 4GiB, that is 4294967296 bytes )
@skip-4g ( -> ) skip-2g ( >> )
( unconditionally skip 2GiB, that is 2147483648 bytes )
@skip-2g ( -> ) #8000 !skip-hi @skip-2g ( -> ) #8000 !skip-hi
( skips hi*2^16 bytes ) ( skips `hi*65536` bytes )
( - 0001 will skip 65536 bytes )
( - 0010 will skip 1048576 bytes )
( - ffff will skip 4294901760 bytes )
@skip-hi ( hi* -> ) @skip-hi ( hi* -> )
#0000 SWP2 SUB2 ( -hi* ) #0000 SWP2 SUB2 ( -hi* )
&loop ORAk ?&ok POP2 JMP2r ( ) &loop ORAk ?&ok POP2 JMP2r ( )
&ok skip-64k INC2 !&loop ( -hi+1* ) &ok skip-64k INC2 !&loop ( -hi+1* )
@skip-64k ( -> ) skip-32k ( fall-through ) ( skips exactly 65536 bytes )
@skip-64k ( -> ) skip-32k ( >> )
( skips exactly 32768 bytes )
@skip-32k ( -> ) #8000 !skip-buf @skip-32k ( -> ) #8000 !skip-buf
( skip up to 65536 bytes )
@skip-lo ( lo* -> ) @skip-lo ( lo* -> )
DUP2 #8000 GTH2 ?&double !skip-buf DUP2 #8001 LTH2 ?{ skip-32k #8000 SUB2 } !skip-buf
&double #8000 SUB2 skip-buf !skip-32k
( skips lo bytes ) ( skips up to 32768 bytes of; limited by the size of buf )
@skip-buf ( lo* -> ) @skip-buf ( n* -> )
ORAk ?&non-zero POP2 JMP2r &non-zero ORAk ?&non-zero POP2 JMP2r &non-zero
DUP2 .File1/len DEO2 DUP2 .File1/len DEO2
;buffer .File1/r DEO2 ;buffer .File1/r DEO2
@ -173,18 +197,34 @@
;read-error print !panic ;read-error print !panic
&ok JMP2r &ok JMP2r
( '0' -> 00 )
( '1' -> 01 )
( ... )
( '7' -> 07 )
( anything else -> 00 )
@octal-digit ( char^ -> oct^ ) @octal-digit ( char^ -> oct^ )
LIT "0 LTHk ?&zero SUB JMP2r &zero POP2 #00 JMP2r LIT "0 LTHk ?&zero SUB JMP2r &zero POP2 #00 JMP2r
( returns values between #00:0000:0000 and #01:ffff:ffff ) ( returns values between #00:0000:0000 and #01:ffff:ffff )
( )
( octal11 of 77777777777 = #01 #ffff #ffff, max value )
( octal11 of 37777777777 = #00 #ffff #ffff )
( octal11 of 00000177777 = #00 #0000 #ffff )
( octal11 of 00000000377 = #00 #0000 #00ff )
( octal11 of 00000000000 = #00 #0000 #0000, min value )
@load-octal11 ( addr* -> carry^ hi* lo* ) @load-octal11 ( addr* -> carry^ hi* lo* )
INC2k load-octal10 ( addr* hi* lo* ; load addr+1 ) INC2k load-octal10 ( addr* hi* lo* ; load addr+1 )
STH2 STH2 ( addr* [lo* hi*] ) STH2 STH2 ( addr* [lo* hi*] )
LDA ( LIT "0 SUB ) octal-digit STH2r STH ( octal^ a^ [lo* b^] ) LDA octal-digit STH2r STH ( octal^ a^ [lo* b^] )
#20 SFT #02 SFT2 STHr STH2r ( carry^ hi* lo* ) #20 SFT #02 SFT2 STHr STH2r ( carry^ hi* lo* )
JMP2r ( carry^ hi* lo* ) JMP2r ( carry^ hi* lo* )
( returns values between #0000:0000 and #3fff:ffff ) ( returns values between #0000:0000 and #3fff:ffff )
( )
( octal10 of 7777777777 = #3fff #ffff, max value )
( octal10 of 0000177777 = #0000 #ffff )
( octal10 of 0000000377 = #0000 #00ff )
( octal10 of 0000000000 = #0000 #0000, min value )
@load-octal10 ( addr* -> hi* lo* ) @load-octal10 ( addr* -> hi* lo* )
#0005 OVR2 ADD2 ( addr* addr+5* ) #0005 OVR2 ADD2 ( addr* addr+5* )
load-octal5 STH2 ( addr* [cd*] ) load-octal5 STH2 ( addr* [cd*] )
@ -194,6 +234,10 @@
JMP2r ( hi* lo* ) JMP2r ( hi* lo* )
( returns values between #0000 and #7fff ) ( returns values between #0000 and #7fff )
( )
( octal5 of 77777 = #7fff, max value )
( octal5 of 00377 = #00ff )
( octal5 of 00000 = #0000, min value )
@load-octal5 ( addr* -> num* ) @load-octal5 ( addr* -> num* )
#1000 LIT2r 0000 ( addr* place* [sum*] ) #1000 LIT2r 0000 ( addr* place* [sum*] )
&loop ( pos* place* [sum*] ) &loop ( pos* place* [sum*] )
@ -206,10 +250,10 @@
( emit 1, 2, 4, or 5 bytes as a decimal number ) ( emit 1, 2, 4, or 5 bytes as a decimal number )
@emit @emit
&1+long STH2 STH2 ,&byte JSR STH2r STH2r &1+long STH2 STH2 /byte STH2r STH2r
&long SWP2 ,&short JSR &long SWP2 /short
&short SWP ,&byte JSR &short SWP /byte
&byte DUP #04 SFT ,&char JSR &byte DUP #04 SFT /char
&char #0f AND DUP #09 GTH #27 MUL ADD #30 ADD #18 DEO &char #0f AND DUP #09 GTH #27 MUL ADD #30 ADD #18 DEO
JMP2r JMP2r
@ -220,6 +264,9 @@
POP2 DUP2 #ffff EQU2 ?{ INC2 #0000 JMP2r } POP2 DUP2 #ffff EQU2 ?{ INC2 #0000 JMP2r }
POP2 INC #0000 #0000 JMP2r POP2 INC #0000 #0000 JMP2r
( since 4-byte integers are called `long` values, )
( i'm calling a 5-byte integer a `longer` value. )
@dump-longer ( carry^ long** -- ) @dump-longer ( carry^ long** -- )
STH2 STH2 dump-byte STH2r STH2r ( >> ) STH2 STH2 dump-byte STH2r STH2r ( >> )
@dump-long ( long** -- ) @dump-long ( long** -- )
@ -256,45 +303,82 @@
;header/checksum #0008 dump-mem ;header/checksum #0008 dump-mem
;header/type #0001 dump-mem ;header/type #0001 dump-mem
;header/linkname #0064 dump-mem ;header/linkname #0064 dump-mem
LIT2 "- 18 DEOk DEOk DEOk DEOk DEO #0a18 DEO LIT2 "+ 18 DEOk DEOk DEOk DEOk DEO #0a18 DEO
LIT2 "s 18 DEO #2018 DEO ;uheader/ustar #0006 dump-mem
;header/size load-octal11 dump-longer #0a18 DEO ;uheader/version #0002 dump-mem
LIT2 "t 18 DEO #2018 DEO ;uheader/owner-name #0020 dump-mem
;header/size load-octal11 round-up-to-512 dump-longer #0a18 DEO ;uheader/group-name #0020 dump-mem
;uheader/major #0008 dump-mem
;uheader/minor #0008 dump-mem
;uheader/filename-prefix #009b dump-mem
;uheader/pad #000c dump-mem
LIT2 "- 18 DEOk DEOk DEOk DEOk DEO #0a18 DEO LIT2 "- 18 DEOk DEOk DEOk DEOk DEO #0a18 DEO
JMP2r JMP2r
( header/size is 11 octal digits; 12th digit is NUL ) ( some handy string constants )
( octal 77777777777 = #01 #ffff #ffff ) @usage "usage: 20 "uxncli 20 "tar.rom 20 "FILENAME 0a 00
( octal 37777777777 = #ffff #ffff ) @missing-filename "error: 20 "missing 20 "filename 0a 00
( octal 00000177777 = #ffff ) @too-many-arguments "error: 20 "too 20 "many 20 "arguments 0a 00
( octal 00000000377 = #ff ) @unsupported "unsupported 20 "format 20 00
( octal 00000000000 = #00 ) @read-error "error 20 "reading 20 "data 0a 00
( header/type -- only 0 and 5 are supported ) ( load argument parser )
( '0' normal file; also could be NUL ) ~arg.tal
( HEADER DETAILS )
( )
( header -- basic v7 tar header )
( /filename - name of file, null-terminated. if ustar, check prefix )
( /mode - file permissions, ignored by uxn )
( /owner - owner ID, ignored by uxn )
( /group - group ID, ignored by uxn )
( /size - file size as 11 octal digits. max size is 8GiB. )
( /mtime - last modification time, ignored by uxn )
( /checksum - 6 octal digits followed by NUL, then space )
( /type -- only 0, 5, and 7 are supported )
( '0' [or NUL] normal file )
( '1' hard link ) ( '1' hard link )
( '2' symlink ) ( '2' symlink )
( '3' character device ) ( '3' character device )
( '4' block device ) ( '4' block device )
( '5' directory ) ( '5' directory )
( '6' fifo ) ( '6' fifo )
( '7' contiguous file ) ( '7' contiguous file -- treat as normal file )
( 'g' global extended header with metadata; POSIX.1-2001 )
( 'x' extended header with metadata for next file; POSIX.1-2001 )
( /linkname -- for hardlinks, the file containing the linked data )
( uheader -- ustar header, found in v7 padding bytes )
( /ustar -- ustar indiciator, should be "ustar " )
( /version -- ustar version )
( /owner-name -- owner name string, ignored by uxn )
( /group-name -- group name string, ignored by uxn )
( /major -- major device number, ignored by uxn )
( /minor -- minor device number, ignored by uxn )
( /filename-prefix -- if non-null, true path is prefix+"/"+filename )
( )
( the v7 header is always 512 bytes even if ustar indicator is absent. )
( header is always exactly 512 bytes )
@header @header
&filename $64 &filename $64 ( 0x00: filename, string, 100 byte )
&mode $8 ( octal ) &mode $8 ( 0x64: mode, octal-1, 8 bytes )
&owner $8 ( octal ) &owner $8 ( 0x6c: owner, octal-1, 8 bytes )
&group $8 ( octal ) &group $8 ( 0x74: group, octal-1, 8 bytes )
&size $c ( octal ) &size $c ( 0x7c: size, octal-1, 12 bytes )
&mtime $c ( octal ) &mtime $c ( 0x88: mtime, octal-1, 12 bytes )
&checksum $8 &checksum $8 ( 0x94: checksum, octal-2, 8 bytes )
&type $1 ( item type ) &type $1 ( 0x9c: file type, 1 byte )
&linkname $64 &linkname $64 ( 0x9d: linked filename, string, 100 bytes )
( >> )
@uheader
&ustar $6 ( 0x101: ustar indicator, non-terminated string, 6 bytes, "ustar " )
&version $2 ( 0x107: ustar version, non-terminated string, 2 bytes )
&owner-name $20 ( 0x109: owner name, string, 32 bytes )
&group-name $20 ( 0x129: group name, string, 32 bytes )
&major $8 ( 0x149: device major number, octal? )
&minor $8 ( 0x151: device minor number, octal? )
&filename-prefix $9b ( 0x159: prefix before filename, string, 155 bytes )
&pad $c ( 0x1f4: padding, 12 bytes )
&end ( 0x200: end of header )
( load argument parser ) ( buffer for reading up to 32k bytes of data at a time )
~arg.tal
( buffer for reading up to 32k bytes of data )
|8000 @buffer $8000 |8000 @buffer $8000