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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
from enum import Enum
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 TrDosImage(KaitaiStruct):
""".trd file is a raw dump of TR-DOS (ZX-Spectrum) floppy. .trd files are
headerless and contain consequent "logical tracks", each logical track
consists of 16 256-byte sectors.
Logical tracks are defined the same way as used by TR-DOS: for single-side
floppies it's just a physical track number, for two-side floppies sides are
interleaved, i.e. logical_track_num = (physical_track_num << 1) | side
So, this format definition is more for TR-DOS filesystem than for .trd files,
which are formatless.
Strings (file names, disk label, disk password) are padded with spaces and use
ZX Spectrum character set, including UDGs, block drawing chars and Basic
tokens. ASCII range is mostly standard ASCII, with few characters (^, `, DEL)
replaced with (up arrow, pound, copyright symbol).
.trd file can be smaller than actual floppy disk, if last logical tracks are
empty (contain no file data) they can be omitted.
"""
class DiskType(Enum):
type_80_tracks_double_side = 22
type_40_tracks_double_side = 23
type_80_tracks_single_side = 24
type_40_tracks_single_side = 25
SEQ_FIELDS = ["files"]
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['files']['start'] = self._io.pos()
self.files = []
i = 0
while True:
if not 'arr' in self._debug['files']:
self._debug['files']['arr'] = []
self._debug['files']['arr'].append({'start': self._io.pos()})
_t_files = self._root.File(self._io, self, self._root)
_t_files._read()
_ = _t_files
self.files.append(_)
self._debug['files']['arr'][len(self.files) - 1]['end'] = self._io.pos()
if _.is_terminator:
break
i += 1
self._debug['files']['end'] = self._io.pos()
class VolumeInfo(KaitaiStruct):
SEQ_FIELDS = ["catalog_end", "unused", "first_free_sector_sector", "first_free_sector_track", "disk_type", "num_files", "num_free_sectors", "tr_dos_id", "unused_2", "password", "unused_3", "num_deleted_files", "label", "unused_4"]
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['catalog_end']['start'] = self._io.pos()
self.catalog_end = self._io.ensure_fixed_contents(b"\x00")
self._debug['catalog_end']['end'] = self._io.pos()
self._debug['unused']['start'] = self._io.pos()
self.unused = self._io.read_bytes(224)
self._debug['unused']['end'] = self._io.pos()
self._debug['first_free_sector_sector']['start'] = self._io.pos()
self.first_free_sector_sector = self._io.read_u1()
self._debug['first_free_sector_sector']['end'] = self._io.pos()
self._debug['first_free_sector_track']['start'] = self._io.pos()
self.first_free_sector_track = self._io.read_u1()
self._debug['first_free_sector_track']['end'] = self._io.pos()
self._debug['disk_type']['start'] = self._io.pos()
self.disk_type = KaitaiStream.resolve_enum(self._root.DiskType, self._io.read_u1())
self._debug['disk_type']['end'] = self._io.pos()
self._debug['num_files']['start'] = self._io.pos()
self.num_files = self._io.read_u1()
self._debug['num_files']['end'] = self._io.pos()
self._debug['num_free_sectors']['start'] = self._io.pos()
self.num_free_sectors = self._io.read_u2le()
self._debug['num_free_sectors']['end'] = self._io.pos()
self._debug['tr_dos_id']['start'] = self._io.pos()
self.tr_dos_id = self._io.ensure_fixed_contents(b"\x10")
self._debug['tr_dos_id']['end'] = self._io.pos()
self._debug['unused_2']['start'] = self._io.pos()
self.unused_2 = self._io.read_bytes(2)
self._debug['unused_2']['end'] = self._io.pos()
self._debug['password']['start'] = self._io.pos()
self.password = self._io.read_bytes(9)
self._debug['password']['end'] = self._io.pos()
self._debug['unused_3']['start'] = self._io.pos()
self.unused_3 = self._io.read_bytes(1)
self._debug['unused_3']['end'] = self._io.pos()
self._debug['num_deleted_files']['start'] = self._io.pos()
self.num_deleted_files = self._io.read_u1()
self._debug['num_deleted_files']['end'] = self._io.pos()
self._debug['label']['start'] = self._io.pos()
self.label = self._io.read_bytes(8)
self._debug['label']['end'] = self._io.pos()
self._debug['unused_4']['start'] = self._io.pos()
self.unused_4 = self._io.read_bytes(3)
self._debug['unused_4']['end'] = self._io.pos()
@property
def num_tracks(self):
if hasattr(self, '_m_num_tracks'):
return self._m_num_tracks if hasattr(self, '_m_num_tracks') else None
self._m_num_tracks = (40 if (self.disk_type.value & 1) != 0 else 80)
return self._m_num_tracks if hasattr(self, '_m_num_tracks') else None
@property
def num_sides(self):
if hasattr(self, '_m_num_sides'):
return self._m_num_sides if hasattr(self, '_m_num_sides') else None
self._m_num_sides = (1 if (self.disk_type.value & 8) != 0 else 2)
return self._m_num_sides if hasattr(self, '_m_num_sides') else None
class PositionAndLengthCode(KaitaiStruct):
SEQ_FIELDS = ["start_address", "length"]
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['start_address']['start'] = self._io.pos()
self.start_address = self._io.read_u2le()
self._debug['start_address']['end'] = self._io.pos()
self._debug['length']['start'] = self._io.pos()
self.length = self._io.read_u2le()
self._debug['length']['end'] = self._io.pos()
class Filename(KaitaiStruct):
SEQ_FIELDS = ["name"]
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['name']['start'] = self._io.pos()
self.name = self._io.read_bytes(8)
self._debug['name']['end'] = self._io.pos()
@property
def first_byte(self):
if hasattr(self, '_m_first_byte'):
return self._m_first_byte if hasattr(self, '_m_first_byte') else None
_pos = self._io.pos()
self._io.seek(0)
self._debug['_m_first_byte']['start'] = self._io.pos()
self._m_first_byte = self._io.read_u1()
self._debug['_m_first_byte']['end'] = self._io.pos()
self._io.seek(_pos)
return self._m_first_byte if hasattr(self, '_m_first_byte') else None
class PositionAndLengthPrint(KaitaiStruct):
SEQ_FIELDS = ["extent_no", "reserved", "length"]
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['extent_no']['start'] = self._io.pos()
self.extent_no = self._io.read_u1()
self._debug['extent_no']['end'] = self._io.pos()
self._debug['reserved']['start'] = self._io.pos()
self.reserved = self._io.read_u1()
self._debug['reserved']['end'] = self._io.pos()
self._debug['length']['start'] = self._io.pos()
self.length = self._io.read_u2le()
self._debug['length']['end'] = self._io.pos()
class PositionAndLengthGeneric(KaitaiStruct):
SEQ_FIELDS = ["reserved", "length"]
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['reserved']['start'] = self._io.pos()
self.reserved = self._io.read_u2le()
self._debug['reserved']['end'] = self._io.pos()
self._debug['length']['start'] = self._io.pos()
self.length = self._io.read_u2le()
self._debug['length']['end'] = self._io.pos()
class PositionAndLengthBasic(KaitaiStruct):
SEQ_FIELDS = ["program_and_data_length", "program_length"]
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['program_and_data_length']['start'] = self._io.pos()
self.program_and_data_length = self._io.read_u2le()
self._debug['program_and_data_length']['end'] = self._io.pos()
self._debug['program_length']['start'] = self._io.pos()
self.program_length = self._io.read_u2le()
self._debug['program_length']['end'] = self._io.pos()
class File(KaitaiStruct):
SEQ_FIELDS = ["name", "extension", "position_and_length", "length_sectors", "starting_sector", "starting_track"]
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['name']['start'] = self._io.pos()
self._raw_name = self._io.read_bytes(8)
io = KaitaiStream(BytesIO(self._raw_name))
self.name = self._root.Filename(io, self, self._root)
self.name._read()
self._debug['name']['end'] = self._io.pos()
self._debug['extension']['start'] = self._io.pos()
self.extension = self._io.read_u1()
self._debug['extension']['end'] = self._io.pos()
self._debug['position_and_length']['start'] = self._io.pos()
_on = self.extension
if _on == 66:
self.position_and_length = self._root.PositionAndLengthBasic(self._io, self, self._root)
self.position_and_length._read()
elif _on == 67:
self.position_and_length = self._root.PositionAndLengthCode(self._io, self, self._root)
self.position_and_length._read()
elif _on == 35:
self.position_and_length = self._root.PositionAndLengthPrint(self._io, self, self._root)
self.position_and_length._read()
else:
self.position_and_length = self._root.PositionAndLengthGeneric(self._io, self, self._root)
self.position_and_length._read()
self._debug['position_and_length']['end'] = self._io.pos()
self._debug['length_sectors']['start'] = self._io.pos()
self.length_sectors = self._io.read_u1()
self._debug['length_sectors']['end'] = self._io.pos()
self._debug['starting_sector']['start'] = self._io.pos()
self.starting_sector = self._io.read_u1()
self._debug['starting_sector']['end'] = self._io.pos()
self._debug['starting_track']['start'] = self._io.pos()
self.starting_track = self._io.read_u1()
self._debug['starting_track']['end'] = self._io.pos()
@property
def is_deleted(self):
if hasattr(self, '_m_is_deleted'):
return self._m_is_deleted if hasattr(self, '_m_is_deleted') else None
self._m_is_deleted = self.name.first_byte == 1
return self._m_is_deleted if hasattr(self, '_m_is_deleted') else None
@property
def is_terminator(self):
if hasattr(self, '_m_is_terminator'):
return self._m_is_terminator if hasattr(self, '_m_is_terminator') else None
self._m_is_terminator = self.name.first_byte == 0
return self._m_is_terminator if hasattr(self, '_m_is_terminator') else None
@property
def contents(self):
if hasattr(self, '_m_contents'):
return self._m_contents if hasattr(self, '_m_contents') else None
_pos = self._io.pos()
self._io.seek((((self.starting_track * 256) * 16) + (self.starting_sector * 256)))
self._debug['_m_contents']['start'] = self._io.pos()
self._m_contents = self._io.read_bytes((self.length_sectors * 256))
self._debug['_m_contents']['end'] = self._io.pos()
self._io.seek(_pos)
return self._m_contents if hasattr(self, '_m_contents') else None
@property
def volume_info(self):
if hasattr(self, '_m_volume_info'):
return self._m_volume_info if hasattr(self, '_m_volume_info') else None
_pos = self._io.pos()
self._io.seek(2048)
self._debug['_m_volume_info']['start'] = self._io.pos()
self._m_volume_info = self._root.VolumeInfo(self._io, self, self._root)
self._m_volume_info._read()
self._debug['_m_volume_info']['end'] = self._io.pos()
self._io.seek(_pos)
return self._m_volume_info if hasattr(self, '_m_volume_info') else None
|
