| \ ***************************************************************************** |
| \ * Copyright (c) 2004, 2008 IBM Corporation |
| \ * All rights reserved. |
| \ * This program and the accompanying materials |
| \ * are made available under the terms of the BSD License |
| \ * which accompanies this distribution, and is available at |
| \ * http://www.opensource.org/licenses/bsd-license.php |
| \ * |
| \ * Contributors: |
| \ * IBM Corporation - initial implementation |
| \ ****************************************************************************/ |
| |
| |
| s" iso-9660" device-name |
| |
| |
| 0 VALUE iso-debug-flag |
| |
| \ Method for code clean up - For release version of code iso-debug-flag is |
| \ cleared and for debugging it is set |
| |
| : iso-debug-print ( str len -- ) iso-debug-flag IF type cr ELSE 2drop THEN ; |
| |
| |
| \ -------------------------------------------------------- |
| \ GLOBAL VARIABLES |
| \ -------------------------------------------------------- |
| |
| |
| 0 VALUE path-tbl-size |
| 0 VALUE path-tbl-addr |
| 0 VALUE root-dir-size |
| 0 VALUE vol-size |
| 0 VALUE logical-blk-size |
| 0 VALUE path-table |
| 0 VALUE count |
| |
| |
| \ INSTANCE VARIABLES |
| |
| |
| INSTANCE VARIABLE dir-addr |
| INSTANCE VARIABLE data-buff |
| INSTANCE VARIABLE #data |
| INSTANCE VARIABLE ptable |
| INSTANCE VARIABLE file-loc |
| INSTANCE VARIABLE file-size |
| INSTANCE VARIABLE cur-file-offset |
| INSTANCE VARIABLE self |
| INSTANCE VARIABLE index |
| |
| |
| \ -------------------------------------------------------- |
| \ COLON DEFINITIONS |
| \ -------------------------------------------------------- |
| |
| |
| \ This method is used to seek to the required position |
| \ Which calls seek of disk-label |
| |
| : seek ( pos.lo pos.hi -- status ) s" seek" $call-parent ; |
| |
| |
| \ This method is used to read the contents of disk |
| \ it calls read of disk-label |
| |
| |
| : read ( addr len -- actual ) s" read" $call-parent ; |
| |
| |
| \ This method releases the memory used as scratch pad buffer. |
| |
| : free-data ( -- ) |
| data-buff @ ( data-buff ) |
| ?DUP IF #data @ free-mem 0 data-buff ! 0 #data ! THEN |
| ; |
| |
| |
| \ This method will release the previous allocated scratch pad buffer and |
| \ allocates a fresh buffer and copies the required number of bytes from the |
| \ media in to it. |
| |
| : read-data ( offset size -- ) |
| dup #data @ > IF |
| free-data dup dup ( offset size size size ) |
| #data ! alloc-mem data-buff ! ( offset size ) |
| THEN |
| swap xlsplit ( size pos.lo pos.hi ) |
| seek -2 and ABORT" seek failed." |
| data-buff @ over read ( size actual ) |
| <> ABORT" read failed." |
| ; |
| |
| |
| \ This method extracts the information required from primary volume |
| \ descriptor and stores the required information in the global variables |
| |
| : extract-vol-info ( -- ) |
| 10 800 * 800 read-data |
| data-buff @ 88 + l@-be to path-tbl-size \ read path table size |
| data-buff @ 94 + l@-be to path-tbl-addr \ read big-endian path table |
| data-buff @ a2 + l@-be dir-addr ! \ gather of root directory info |
| data-buff @ 0aa + l@-be to root-dir-size \ get volume info |
| data-buff @ 54 + l@-be to vol-size \ size in blocks |
| data-buff @ 82 + l@-be to logical-blk-size |
| path-tbl-size alloc-mem dup TO path-table path-tbl-size erase |
| path-tbl-addr 800 * xlsplit seek drop |
| path-table path-tbl-size read drop \ pathtable in-system-memory copy |
| ; |
| |
| |
| \ This method converts the ISO file name to user readable form |
| |
| : file-name ( str len -- str' len' ) |
| 2dup [char] ; findchar IF |
| ( str len offset ) |
| nip \ Omit the trailing ";1" revision of ISO9660 file name |
| 2dup + 1- ( str newlen endptr ) |
| c@ [CHAR] . = IF |
| 1- ( str len' ) \ Remove trailing dot |
| THEN |
| THEN |
| ; |
| |
| |
| \ triplicates top stack element |
| |
| : dup3 ( num -- num num num ) dup dup dup ; |
| |
| |
| \ This method is used for traversing records of path table. If the |
| \ file identifier length is odd 1 byte padding is done else not. |
| |
| : get-next-record ( rec-addr -- next-rec-offset ) |
| dup3 ( rec-addr rec-addr rec-addr rec-addr ) |
| self @ 1 + self ! ( rec-addr rec-addr rec-addr rec-addr ) |
| c@ 1 AND IF ( rec-addr rec-addr rec-addr ) |
| c@ + 9 ( rec-addr rec-addr' rec-len ) |
| ELSE |
| c@ + 8 ( rec-addr rec-addr' rec-len ) |
| THEN |
| + swap - ( next-rec-offset ) |
| ; |
| |
| |
| \ This method does search of given directory name in the path table |
| \ and returns true if finds a match else false. |
| |
| : path-table-search ( str len -- TRUE | FALSE ) |
| path-table path-tbl-size + path-table ptable @ + DO ( str len ) |
| 2dup I 6 + w@-be index @ = ( str len str len ) |
| -rot I 8 + I c@ |
| iso-debug-flag IF |
| ." ISO: comparing path name '" |
| 4dup type ." ' with '" type ." '" cr |
| THEN |
| string=ci and IF ( str len ) |
| s" Directory Matched!! " iso-debug-print ( str len ) |
| self @ index ! ( str len ) |
| I 2 + l@-be dir-addr ! I dup ( str len rec-addr ) |
| get-next-record + path-table - ptable ! ( str len ) |
| 2drop TRUE UNLOOP EXIT ( TRUE ) |
| THEN |
| I get-next-record ( str len next-rec-offset ) |
| +LOOP |
| 2drop |
| FALSE ( FALSE ) |
| s" Invalid path / directory " iso-debug-print |
| ; |
| |
| |
| \ METHOD for searching for a file with in a directory |
| |
| : search-file-dir ( str len -- TRUE | FALSE ) |
| dir-addr @ 800 * dir-addr ! ( str len ) |
| dir-addr @ 100 read-data ( str len ) |
| data-buff @ 0e + l@-be dup >r ( str len rec-len ) |
| 100 > IF ( str len ) |
| s" size dir record" iso-debug-print ( str len ) |
| dir-addr @ r@ read-data ( str len ) |
| THEN |
| r> data-buff @ + data-buff @ DO ( str len ) |
| I 19 + c@ 2 and 0= I c@ 0<> and IF ( str len ) |
| 2dup ( str len str len ) |
| I 21 + I 20 + c@ ( str len str len str' len' ) |
| iso-debug-flag IF |
| ." ISO: comparing file name '" |
| 4dup type ." ' with '" type ." '" cr |
| THEN |
| file-name string=ci IF ( str len ) |
| s" File found!" iso-debug-print ( str len ) |
| I 6 + l@-be 800 * ( str len file-loc ) |
| file-loc ! ( str len ) |
| I 0e + l@-be file-size ! ( str len ) |
| 2drop |
| TRUE ( TRUE ) |
| UNLOOP |
| EXIT |
| THEN |
| THEN |
| ( str len ) |
| I c@ ?dup 0= IF |
| 800 I 7ff AND - |
| iso-debug-flag IF |
| ." skipping " dup . ." bytes at end of sector" cr |
| THEN |
| THEN |
| ( str len offset ) |
| +LOOP |
| 2drop |
| FALSE ( FALSE ) |
| s" file not found" iso-debug-print |
| ; |
| |
| |
| \ This method splits the given absolute path in to directories from root and |
| \ calls search-path-table. when string reaches to state when it can not be |
| \ split i.e., end of the path, calls search-file-dir is made to search for |
| \ file . |
| |
| : search-path ( str len -- FALSE|TRUE ) |
| 0 ptable ! |
| 1 self ! |
| 1 index ! |
| dup ( str len len ) |
| 0= IF |
| 3drop FALSE ( FALSE ) |
| s" Empty path name " iso-debug-print EXIT ( FALSE ) |
| THEN |
| OVER c@ ( str len char ) |
| [char] \ = IF ( str len ) |
| swap 1 + swap 1 - BEGIN ( str len ) |
| [char] \ split ( str len str' len ' ) |
| dup 0 = IF ( str len str' len ' ) |
| 2drop search-file-dir EXIT ( TRUE | FALSE ) |
| ELSE |
| 2swap path-table-search invert IF ( str' len ' ) |
| 2drop FALSE EXIT ( FALSE ) |
| THEN |
| THEN |
| AGAIN |
| ELSE BEGIN |
| [char] \ split dup 0 = IF ( str len str' len' ) |
| 2drop search-file-dir EXIT ( TRUE | FALSE ) |
| ELSE |
| 2swap path-table-search invert IF ( str' len ' ) |
| 2drop FALSE EXIT ( FALSE ) |
| THEN |
| THEN |
| AGAIN |
| THEN |
| ; |
| |
| |
| \ this method will seek and read the file in to the given memory location |
| |
| 0 VALUE loc |
| : load ( addr -- len ) |
| dup to loc ( addr ) |
| file-loc @ xlsplit seek drop |
| file-size @ read ( file-size ) |
| iso-debug-flag IF s" Bytes returned from read:" type dup . cr THEN |
| dup file-size @ <> ABORT" read failed!" |
| ; |
| |
| |
| |
| \ memory used by the file system will be freed |
| |
| : close ( -- ) |
| free-data count 1 - dup to count 0 = IF |
| path-table path-tbl-size free-mem |
| 0 TO path-table |
| THEN |
| ; |
| |
| |
| \ open method of the file system |
| |
| : open ( -- TRUE | FALSE ) |
| 0 data-buff ! |
| 0 #data ! |
| 0 ptable ! |
| 0 file-loc ! |
| 0 file-size ! |
| 0 cur-file-offset ! |
| 1 self ! |
| 1 index ! |
| count 0 = IF |
| s" extract-vol-info called " iso-debug-print |
| extract-vol-info |
| THEN |
| count 1 + to count |
| my-args search-path IF |
| file-loc @ xlsplit seek drop |
| TRUE ( TRUE ) |
| ELSE |
| close |
| FALSE ( FALSE ) |
| THEN |
| 0 cur-file-offset ! |
| s" opened ISO9660 package" iso-debug-print |
| ; |
| |
| |
| \ public seek method |
| |
| : seek ( pos.lo pos.hi -- status ) |
| lxjoin dup cur-file-offset ! ( offset ) |
| file-loc @ + xlsplit ( pos.lo pos.hi ) |
| s" seek" $call-parent ( status ) |
| ; |
| |
| |
| \ public read method |
| |
| : read ( addr len -- actual ) |
| file-size @ cur-file-offset @ - ( addr len remainder-of-file ) |
| min ( addr len|remainder-of-file ) |
| s" read" $call-parent ( actual ) |
| dup cur-file-offset @ + cur-file-offset ! ( actual ) |
| cur-file-offset @ ( offset actual ) |
| xlsplit seek drop ( actual ) |
| ; |
| |
