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
|
# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
from pkg_resources import parse_version
from kaitaistruct import __version__ as ks_version, KaitaiStruct, KaitaiStream, BytesIO
if parse_version(ks_version) < parse_version('0.7'):
raise Exception("Incompatible Kaitai Struct Python API: 0.7 or later is required, but you have %s" % (ks_version))
class Comparison1Kaitai(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._read()
def _read(self):
self.count = self._io.read_u4le()
self.items = [None] * (self.count)
for i in range(self.count):
self.items[i] = self._root.Item(self._io, self, self._root)
class Item(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._read()
def _read(self):
self.num1 = self._io.read_u1()
self.num2_lo = self._io.read_u2le()
self.num2_hi = self._io.read_u1()
# tweaked
self.num2
self.flags = self._root.Item.Flags(self._io, self, self._root)
self.fixedarray1 = [None] * (3)
for i in range(3):
self.fixedarray1[i] = self._io.read_u1()
self.name1 = (self._io.read_bytes_term(0, False, True, True)).decode(u"utf-8")
self.len_name2 = self._io.read_u1()
self.name2 = (self._io.read_bytes(self.len_name2)).decode(u"utf-8")
class Flags(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._read()
def _read(self):
self.bool1 = self._io.read_bits_int(1) != 0
self.num4 = self._io.read_bits_int(3)
self.padding = self._io.read_bits_int(4)
@property
def num2(self):
if hasattr(self, '_m_num2'):
return self._m_num2 if hasattr(self, '_m_num2') else None
self._m_num2 = ((self.num2_hi << 16) | self.num2_lo)
return self._m_num2 if hasattr(self, '_m_num2') else None
data = open("blob","rb").read()
Comparison1Kaitai.from_bytes(data)
from timeit import timeit
parsetime = timeit(lambda: Comparison1Kaitai.from_bytes(data), number=1000)/1000
print("Timeit measurements:")
print("parsing: {:.10f} sec/call".format(parsetime))
|
