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# 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
import collections
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 ApmPartitionTable(KaitaiStruct):
"""
.. seealso::
Specification taken from https://en.wikipedia.org/wiki/Apple_Partition_Map
"""
SEQ_FIELDS = []
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
pass
class PartitionEntry(KaitaiStruct):
SEQ_FIELDS = ["magic", "reserved_1", "number_of_partitions", "partition_start", "partition_size", "partition_name", "partition_type", "data_start", "data_size", "partition_status", "boot_code_start", "boot_code_size", "boot_loader_address", "reserved_2", "boot_code_entry", "reserved_3", "boot_code_cksum", "processor_type"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['magic']['start'] = self._io.pos()
self.magic = self._io.ensure_fixed_contents(b"\x50\x4D")
self._debug['magic']['end'] = self._io.pos()
self._debug['reserved_1']['start'] = self._io.pos()
self.reserved_1 = self._io.read_bytes(2)
self._debug['reserved_1']['end'] = self._io.pos()
self._debug['number_of_partitions']['start'] = self._io.pos()
self.number_of_partitions = self._io.read_u4be()
self._debug['number_of_partitions']['end'] = self._io.pos()
self._debug['partition_start']['start'] = self._io.pos()
self.partition_start = self._io.read_u4be()
self._debug['partition_start']['end'] = self._io.pos()
self._debug['partition_size']['start'] = self._io.pos()
self.partition_size = self._io.read_u4be()
self._debug['partition_size']['end'] = self._io.pos()
self._debug['partition_name']['start'] = self._io.pos()
self.partition_name = (KaitaiStream.bytes_terminate(self._io.read_bytes(32), 0, False)).decode(u"ascii")
self._debug['partition_name']['end'] = self._io.pos()
self._debug['partition_type']['start'] = self._io.pos()
self.partition_type = (KaitaiStream.bytes_terminate(self._io.read_bytes(32), 0, False)).decode(u"ascii")
self._debug['partition_type']['end'] = self._io.pos()
self._debug['data_start']['start'] = self._io.pos()
self.data_start = self._io.read_u4be()
self._debug['data_start']['end'] = self._io.pos()
self._debug['data_size']['start'] = self._io.pos()
self.data_size = self._io.read_u4be()
self._debug['data_size']['end'] = self._io.pos()
self._debug['partition_status']['start'] = self._io.pos()
self.partition_status = self._io.read_u4be()
self._debug['partition_status']['end'] = self._io.pos()
self._debug['boot_code_start']['start'] = self._io.pos()
self.boot_code_start = self._io.read_u4be()
self._debug['boot_code_start']['end'] = self._io.pos()
self._debug['boot_code_size']['start'] = self._io.pos()
self.boot_code_size = self._io.read_u4be()
self._debug['boot_code_size']['end'] = self._io.pos()
self._debug['boot_loader_address']['start'] = self._io.pos()
self.boot_loader_address = self._io.read_u4be()
self._debug['boot_loader_address']['end'] = self._io.pos()
self._debug['reserved_2']['start'] = self._io.pos()
self.reserved_2 = self._io.read_bytes(4)
self._debug['reserved_2']['end'] = self._io.pos()
self._debug['boot_code_entry']['start'] = self._io.pos()
self.boot_code_entry = self._io.read_u4be()
self._debug['boot_code_entry']['end'] = self._io.pos()
self._debug['reserved_3']['start'] = self._io.pos()
self.reserved_3 = self._io.read_bytes(4)
self._debug['reserved_3']['end'] = self._io.pos()
self._debug['boot_code_cksum']['start'] = self._io.pos()
self.boot_code_cksum = self._io.read_u4be()
self._debug['boot_code_cksum']['end'] = self._io.pos()
self._debug['processor_type']['start'] = self._io.pos()
self.processor_type = (KaitaiStream.bytes_terminate(self._io.read_bytes(16), 0, False)).decode(u"ascii")
self._debug['processor_type']['end'] = self._io.pos()
@property
def partition(self):
if hasattr(self, '_m_partition'):
return self._m_partition if hasattr(self, '_m_partition') else None
if (self.partition_status & 1) != 0:
io = self._root._io
_pos = io.pos()
io.seek((self.partition_start * self._root.sector_size))
self._debug['_m_partition']['start'] = io.pos()
self._m_partition = io.read_bytes((self.partition_size * self._root.sector_size))
self._debug['_m_partition']['end'] = io.pos()
io.seek(_pos)
return self._m_partition if hasattr(self, '_m_partition') else None
@property
def data(self):
if hasattr(self, '_m_data'):
return self._m_data if hasattr(self, '_m_data') else None
io = self._root._io
_pos = io.pos()
io.seek((self.data_start * self._root.sector_size))
self._debug['_m_data']['start'] = io.pos()
self._m_data = io.read_bytes((self.data_size * self._root.sector_size))
self._debug['_m_data']['end'] = io.pos()
io.seek(_pos)
return self._m_data if hasattr(self, '_m_data') else None
@property
def boot_code(self):
if hasattr(self, '_m_boot_code'):
return self._m_boot_code if hasattr(self, '_m_boot_code') else None
io = self._root._io
_pos = io.pos()
io.seek((self.boot_code_start * self._root.sector_size))
self._debug['_m_boot_code']['start'] = io.pos()
self._m_boot_code = io.read_bytes(self.boot_code_size)
self._debug['_m_boot_code']['end'] = io.pos()
io.seek(_pos)
return self._m_boot_code if hasattr(self, '_m_boot_code') else None
@property
def sector_size(self):
"""0x200 (512) bytes for disks, 0x1000 (4096) bytes is not supported by APM
0x800 (2048) bytes for CDROM
"""
if hasattr(self, '_m_sector_size'):
return self._m_sector_size if hasattr(self, '_m_sector_size') else None
self._m_sector_size = 512
return self._m_sector_size if hasattr(self, '_m_sector_size') else None
@property
def partition_lookup(self):
"""Every partition entry contains the number of partition entries.
We parse the first entry, to know how many to parse, including the first one.
No logic is given what to do if other entries have a different number.
"""
if hasattr(self, '_m_partition_lookup'):
return self._m_partition_lookup if hasattr(self, '_m_partition_lookup') else None
io = self._root._io
_pos = io.pos()
io.seek(self._root.sector_size)
self._debug['_m_partition_lookup']['start'] = io.pos()
self._raw__m_partition_lookup = io.read_bytes(self.sector_size)
io = KaitaiStream(BytesIO(self._raw__m_partition_lookup))
self._m_partition_lookup = self._root.PartitionEntry(io, self, self._root)
self._m_partition_lookup._read()
self._debug['_m_partition_lookup']['end'] = io.pos()
io.seek(_pos)
return self._m_partition_lookup if hasattr(self, '_m_partition_lookup') else None
@property
def partition_entries(self):
if hasattr(self, '_m_partition_entries'):
return self._m_partition_entries if hasattr(self, '_m_partition_entries') else None
io = self._root._io
_pos = io.pos()
io.seek(self._root.sector_size)
self._debug['_m_partition_entries']['start'] = io.pos()
self._raw__m_partition_entries = [None] * (self._root.partition_lookup.number_of_partitions)
self._m_partition_entries = [None] * (self._root.partition_lookup.number_of_partitions)
for i in range(self._root.partition_lookup.number_of_partitions):
if not 'arr' in self._debug['_m_partition_entries']:
self._debug['_m_partition_entries']['arr'] = []
self._debug['_m_partition_entries']['arr'].append({'start': io.pos()})
self._raw__m_partition_entries[i] = io.read_bytes(self.sector_size)
io = KaitaiStream(BytesIO(self._raw__m_partition_entries[i]))
_t__m_partition_entries = self._root.PartitionEntry(io, self, self._root)
_t__m_partition_entries._read()
self._m_partition_entries[i] = _t__m_partition_entries
self._debug['_m_partition_entries']['arr'][i]['end'] = io.pos()
self._debug['_m_partition_entries']['end'] = io.pos()
io.seek(_pos)
return self._m_partition_entries if hasattr(self, '_m_partition_entries') else None
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