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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
from common import WiiStringTableBuilder, alignUp, alignDown
from filesystem import *
import struct
import os
import cStringIO
class WiiArchiveU8:
class ReadInfo:
# startPos, stringTable, currentNode
pass
class WriteInfo:
# startPos, stringTableBuilder, currentRecursionLevel,
# currentNode, nextDataOffset
pass
def __init__(self, handle=None):
self.root = WiiDirectory()
if handle:
if not hasattr(handle, 'read'):
handle = cStringIO.StringIO(handle)
info = WiiArchiveU8.ReadInfo()
info.startPos = handle.tell()
magic = handle.read(4)
if magic != "U\xAA8\x2D":
print("WiiArchiveU8: tried to load an archive without the U8 magic")
fstStart, fstSize, dataOffset = struct.unpack('>III', handle.read(12))
# read the FST
handle.seek(info.startPos + fstStart)
# read the root node
handle.seek(8, os.SEEK_CUR) # ignore type, nameOffset and dataOffset
rootNodeLastChild = struct.unpack('>I', handle.read(4))[0]
# but before we do this, read the string table
savePos = handle.tell()
handle.seek(savePos + ((rootNodeLastChild - 1) * 12))
stringTableLength = fstSize - (rootNodeLastChild * 12)
info.stringTable = handle.read(stringTableLength)
# now read the root node
handle.seek(savePos)
info.currentNode = 1
self._readDir(handle, self.root, rootNodeLastChild, info)
def _readDir(self, handle, directory, lastChild, info):
# read every node in this directory
while info.currentNode < lastChild:
info.currentNode += 1
value, dataOffset, size = struct.unpack('>III', handle.read(12))
nameOffset = value & 0xFFFFFF
objType = value >> 24
if objType == 0:
newObj = WiiFile()
elif objType == 1:
newObj = WiiDirectory()
else:
raise "oh crap! unknown FS obj type %d" % objType
nameEnd = info.stringTable.find("\0", nameOffset)
newObj.name = info.stringTable[nameOffset:nameEnd]
if newObj.isFile():
savePos = handle.tell()
handle.seek(info.startPos + dataOffset)
newObj.data = handle.read(size)
handle.seek(savePos)
elif newObj.isDirectory():
self._readDir(handle, newObj, size, info)
directory.addChild(newObj)
def pack(self, handle=None):
returnData = False
if handle is None:
handle = cStringIO.StringIO()
returnData = True
info = WiiArchiveU8.WriteInfo()
# first off, before we do anything else, create the string table
info.stringTableBuilder = WiiStringTableBuilder()
self._addNodeToStringTable(self.root, info.stringTableBuilder)
stringTable = info.stringTableBuilder.data
# calculate various fun offsets/sizes
nodeCount = self._countNode(self.root)
info.startPos = handle.tell()
fstStart = 0x20
nodeDataSize = nodeCount * 12
stringTableSize = len(stringTable)
fstSize = nodeDataSize + stringTableSize
dataOffset = alignUp(fstStart + fstSize, 0x20)
# now write the header
handle.write("U\xAA8\x2D")
handle.write(struct.pack('>III', fstStart, fstSize, dataOffset))
handle.write("\0"*16)
# write root node
info.currentNode = 1
info.currentRecursionLevel = 0
info.nextDataOffset = dataOffset
handle.write(struct.pack('>III',
0x01000000 | info.stringTableBuilder.add(''),
0, nodeCount))
self._writeDir(handle, self.root, info)
# write string table
handle.write(stringTable)
# write data (after padding)
handle.write("\0" * (dataOffset - fstSize - fstStart))
self._writeNodeData(handle, self.root)
# looks like we are finally done
if returnData:
data = handle.getvalue()
handle.close()
return data
def _addNodeToStringTable(self, node, table):
table.add(node.name)
if node.isDirectory():
for obj in node.children:
self._addNodeToStringTable(obj, table)
def _countNode(self, node):
if node.isDirectory():
return 1 + sum(map(self._countNode, node.children))
else:
return 1
def _writeDir(self, handle, directory, info):
for obj in directory.children:
info.currentNode += 1
if obj.isDirectory():
handle.write(struct.pack('>III',
0x01000000 | info.stringTableBuilder.add(obj.name),
info.currentRecursionLevel, 0))
lastChildFieldPos = handle.tell() - 4
info.currentRecursionLevel += 1
self._writeDir(handle, obj, info)
info.currentRecursionLevel -= 1
# write lastChild field
dirEndPos = handle.tell()
handle.seek(lastChildFieldPos)
handle.write(struct.pack('>I', info.currentNode))
handle.seek(dirEndPos)
elif obj.isFile():
handle.write(struct.pack('>III',
info.stringTableBuilder.add(obj.name),
info.nextDataOffset, len(obj.data)))
info.nextDataOffset = alignUp(info.nextDataOffset + len(obj.data), 0x20)
def _writeNodeData(self, handle, node):
if node.isDirectory():
for obj in node.children:
self._writeNodeData(handle, obj)
elif node.isFile():
size = len(node.data)
handle.write(node.data)
handle.write("\0" * (alignUp(size, 0x20) - size))
def resolvePath(self, *args):
return self.root.resolvePath(*args)
|
