blob: 418cf4e053121b24e42baf821a2280cac20da924 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
\ *****************************************************************************
\ * 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
\ ****************************************************************************/
\ package which adds support to read the romfs
\ this package is somehow limited as the maximum supported length
\ for a file name is hardcoded to 0x100
s" rom-files" device-name
INSTANCE VARIABLE length
INSTANCE VARIABLE next-file
INSTANCE VARIABLE buffer
INSTANCE VARIABLE buffer-size
INSTANCE VARIABLE file
INSTANCE VARIABLE file-size
INSTANCE VARIABLE found
: open true
100 dup buffer-size ! alloc-mem buffer ! false found ! ;
: close buffer @ buffer-size @ free-mem ;
: read ( addr len -- actual ) s" read" $call-parent ;
: seek ( lo hi -- status ) s" seek" $call-parent ;
: .read-file-name ( offset -- str len )
\ move to the file name offset
0 seek drop
\ read <buffer-size> bytes from that address
buffer @ buffer-size @ read drop
\ write a 0 to make sure it is a 0 terminated string
buffer-size @ 1 - buffer @ + 0 swap c!
buffer @ zcount ;
: .print-info ( offset -- )
dup 2 spaces 6 0.r 2 spaces dup
8 + 0 seek drop length 8 read drop
6 length @ swap 0.r 2 spaces
20 + .read-file-name type cr ;
: .list-header cr
s" --offset---size-----file-name----" type cr ;
: list
.list-header
0 0 BEGIN + dup
.print-info dup 0 seek drop
next-file 8 read drop next-file @
dup 0= UNTIL 2drop ;
: (find-file) ( name len -- offset | -1 )
0 0 seek drop false found !
file-size ! file ! 0 0 BEGIN + dup
20 + .read-file-name file @ file-size @
str= IF true found ! THEN
dup 0 seek drop
next-file 8 read drop next-file @
dup 0= found @ or UNTIL drop found @ 0=
IF drop -1 THEN ;
: load ( addr -- size )
my-parent instance>args 2@ [char] \ left-parse-string 2drop
(find-file) dup -1 = IF 2drop 0 ELSE
\ got to the beginning
0 0 seek drop
\ read the file size
dup 8 + 0 seek drop
here 8 read drop here @ ( dest-addr offset file-size )
\ read data start offset
over 18 + 0 seek drop
here 8 read drop here @ ( dest-addr offset file-size data-offset )
rot + 0 seek drop ( dest-addr file-size )
read
THEN
;
|
