util: Move ISO, FAT stuff to a library
This commit is contained in:
K Lange
parent
707b7f7ed2
commit
106ca0b88f
363
util/__init__.krk
Normal file
363
util/__init__.krk
Normal file
@ -0,0 +1,363 @@
|
||||
import fileio
|
||||
|
||||
def to_int(little: bool, data: bytes):
|
||||
let out = 0
|
||||
if little: data = reversed(data)
|
||||
for x in data:
|
||||
out *= 0x100
|
||||
out += x
|
||||
return out
|
||||
|
||||
def to_bytes(little: bool, val: int, length: int):
|
||||
let out = [0] * length
|
||||
let i = 0
|
||||
while val and i < length:
|
||||
out[i] = val & 0xFF
|
||||
val >>= 8
|
||||
i++
|
||||
if not little:
|
||||
out = reversed(out)
|
||||
return bytes(out)
|
||||
|
||||
def read_struct(fmt: str, data: bytes, offset: int):
|
||||
if not fmt or not isinstance(fmt,str):
|
||||
raise ValueError
|
||||
# First, read the endianness
|
||||
let littleEndian = True
|
||||
if fmt[0] in '@<>#!':
|
||||
if fmt[0] == '>': littleEndian = False
|
||||
else if fmt[0] == '!': littleEndian = False
|
||||
fmt = fmt[1:]
|
||||
# Then read length
|
||||
let length = None
|
||||
if fmt[0] in '0123456789':
|
||||
length = int(fmt[0])
|
||||
fmt = fmt[1:]
|
||||
while fmt[0] in '012345679':
|
||||
length *= 10
|
||||
length += int(fmt[0])
|
||||
fmt = fmt[1:]
|
||||
# Then read type
|
||||
if fmt[0] == 'B':
|
||||
return int(data[offset]), offset + 1
|
||||
else if fmt[0] == 'b':
|
||||
let out = int(data[offset])
|
||||
if out > 0x7F: out = -out
|
||||
return out, offset + 1
|
||||
else if fmt[0] == 's':
|
||||
return bytes([data[x] for x in range(offset,offset+length)]), offset + length
|
||||
else if fmt[0] == 'I':
|
||||
return to_int(littleEndian, bytes([data[x] for x in range(offset,offset+4)])), offset + 4
|
||||
else if fmt[0] == 'H':
|
||||
return to_int(littleEndian, bytes([data[x] for x in range(offset,offset+2)])), offset + 2
|
||||
raise ValueError("Huh")
|
||||
|
||||
def pack_into(fmt: str, data: bytes, offset: int, val: any):
|
||||
if not fmt or not isinstance(fmt,str):
|
||||
raise ValueError
|
||||
# First, read the endianness
|
||||
let littleEndian = True
|
||||
if fmt[0] in '@<>#!':
|
||||
if fmt[0] == '>': littleEndian = False
|
||||
else if fmt[0] == '!': littleEndian = False
|
||||
fmt = fmt[1:]
|
||||
# Then read length
|
||||
let length = None
|
||||
if fmt[0] in '0123456789':
|
||||
length = int(fmt[0])
|
||||
fmt = fmt[1:]
|
||||
while fmt[0] in '012345679':
|
||||
length *= 10
|
||||
length += int(fmt[0])
|
||||
fmt = fmt[1:]
|
||||
# Then read type
|
||||
if fmt[0] == 'B':
|
||||
data[offset] = val
|
||||
return offset + 1
|
||||
else if fmt[0] == 'b':
|
||||
data[offset] = val
|
||||
return offset + 1
|
||||
else if fmt[0] == 's':
|
||||
for x in range(length):
|
||||
data[offset+x] = val[x]
|
||||
return offset + length
|
||||
else if fmt[0] == 'I':
|
||||
for x in to_bytes(littleEndian, val, 4):
|
||||
data[offset] = x
|
||||
offset++
|
||||
return offset
|
||||
else if fmt[0] == 'H':
|
||||
for x in to_bytes(littleEndian, val, 2):
|
||||
data[offset] = x
|
||||
offset++
|
||||
return offset
|
||||
raise ValueError("Huh")
|
||||
|
||||
class ISO(object):
|
||||
|
||||
def __init__(self, path):
|
||||
let data
|
||||
with fileio.open(path, 'rb') as f:
|
||||
self.data = bytearray(f.read())
|
||||
self.sector_size = 2048
|
||||
let o = 0x10 * self.sector_size
|
||||
let _unused
|
||||
self.type, o = read_struct('B',self.data,o)
|
||||
self.id, o = read_struct('5s',self.data,o)
|
||||
self.version, o = read_struct('B',self.data,o)
|
||||
_unused, o = read_struct('B',self.data,o)
|
||||
self.system_id, o = read_struct('32s',self.data,o)
|
||||
self.volume_id, o = read_struct('32s',self.data,o)
|
||||
_unused, o = read_struct('8s',self.data,o)
|
||||
self.volume_space_lsb, o = read_struct('<I',self.data,o)
|
||||
self.volume_space_msb, o = read_struct('>I',self.data,o)
|
||||
_unused, o = read_struct('32s',self.data,o)
|
||||
self.volume_set_lsb, o = read_struct('<H',self.data,o)
|
||||
self.volume_set_msb, o = read_struct('>H',self.data,o)
|
||||
self.volume_seq_lsb, o = read_struct('<H',self.data,o)
|
||||
self.volume_seq_msb, o = read_struct('>H',self.data,o)
|
||||
self.logical_block_size_lsb, o = read_struct('<H',self.data,o)
|
||||
self.logical_block_size_msb, o = read_struct('>H',self.data,o)
|
||||
self.path_table_size_lsb, o = read_struct('<I',self.data,o)
|
||||
self.path_table_size_msb, o = read_struct('>I',self.data,o)
|
||||
self.path_table_lsb, o = read_struct('<I',self.data,o)
|
||||
self.optional_path_table_lsb, o = read_struct('<I',self.data,o)
|
||||
self.path_table_msb, o = read_struct('>I',self.data,o)
|
||||
self.optional_path_table_msb, o = read_struct('>I',self.data,o)
|
||||
let _offset = o
|
||||
self.root_dir_entry, o = read_struct('34s',self.data,o)
|
||||
|
||||
self.root = ISOFile(self,_offset)
|
||||
self._cache = {}
|
||||
|
||||
def get_file(self, path):
|
||||
if path == '/':
|
||||
return self.root
|
||||
else:
|
||||
if path in self._cache:
|
||||
return self._cache[path]
|
||||
let units = path.split('/')
|
||||
units = units[1:] # remove root
|
||||
let me = self.root
|
||||
for i in units:
|
||||
let next_file = me.find(i)
|
||||
if not next_file:
|
||||
me = None
|
||||
break
|
||||
else:
|
||||
me = next_file
|
||||
self._cache[path] = me
|
||||
return me
|
||||
|
||||
class ISOFile(object):
|
||||
|
||||
def __init__(self, iso, offset):
|
||||
self.iso = iso
|
||||
self.offset = offset
|
||||
|
||||
let o = offset
|
||||
self.length, o = read_struct('B', self.iso.data, o)
|
||||
if not self.length:
|
||||
return
|
||||
self.ext_length, o = read_struct('B', self.iso.data, o)
|
||||
self.extent_start_lsb, o = read_struct('<I',self.iso.data, o)
|
||||
self.extent_start_msb, o = read_struct('>I',self.iso.data, o)
|
||||
self.extent_length_lsb, o = read_struct('<I',self.iso.data, o)
|
||||
self.extent_length_msb, o = read_struct('>I',self.iso.data, o)
|
||||
|
||||
self.date_data, o = read_struct('7s', self.iso.data, o)
|
||||
|
||||
self.flags, o = read_struct('b', self.iso.data, o)
|
||||
self.interleave_units, o = read_struct('b', self.iso.data, o)
|
||||
self.interleave_gap, o = read_struct('b', self.iso.data, o)
|
||||
|
||||
self.volume_seq_lsb, o = read_struct('<H',self.iso.data, o)
|
||||
self.volume_seq_msb, o = read_struct('>H',self.iso.data, o)
|
||||
|
||||
self.name_len, o = read_struct('b', self.iso.data, o)
|
||||
self.name, o = read_struct('{}s'.format(self.name_len), self.iso.data, o)
|
||||
self.name = self.name.decode()
|
||||
|
||||
def write_extents(self):
|
||||
pack_into('<I', self.iso.data, self.offset + 2, self.extent_start_lsb)
|
||||
pack_into('>I', self.iso.data, self.offset + 6, self.extent_start_lsb)
|
||||
pack_into('<I', self.iso.data, self.offset + 10, self.extent_length_lsb)
|
||||
pack_into('>I', self.iso.data, self.offset + 14, self.extent_length_lsb)
|
||||
|
||||
def readable_name(self):
|
||||
if not ';' in self.name:
|
||||
return self.name.lower()
|
||||
else:
|
||||
let tmp, _
|
||||
tmp, _ = self.name.split(';')
|
||||
return tmp.lower()
|
||||
|
||||
|
||||
def list(self):
|
||||
let sectors = self.iso.data[self.extent_start_lsb * self.iso.sector_size: self.extent_start_lsb * self.iso.sector_size+ 3 * self.iso.sector_size]
|
||||
let offset = 0
|
||||
|
||||
while 1:
|
||||
let f = ISOFile(self.iso, self.extent_start_lsb * self.iso.sector_size + offset)
|
||||
yield f
|
||||
offset += f.length
|
||||
if not f.length:
|
||||
break
|
||||
|
||||
def find(self, name):
|
||||
let sectors = self.iso.data[self.extent_start_lsb * self.iso.sector_size: self.extent_start_lsb * self.iso.sector_size+ 3 * self.iso.sector_size]
|
||||
let offset = 0
|
||||
if '.' in name and len(name.split('.')[0]) > 8:
|
||||
let a, b
|
||||
a, b = name.split('.')
|
||||
name = a[:8] + '.' + b
|
||||
if '-' in name:
|
||||
name = name.replace('-','_')
|
||||
while 1:
|
||||
let f = ISOFile(self.iso, self.extent_start_lsb * self.iso.sector_size + offset)
|
||||
if not f.length:
|
||||
if offset < self.extent_length_lsb:
|
||||
offset += 1
|
||||
continue
|
||||
else:
|
||||
break
|
||||
if ';' in f.name:
|
||||
let tmp, _
|
||||
tmp, _ = f.name.split(';')
|
||||
if tmp.endswith('.'):
|
||||
tmp = tmp[:-1]
|
||||
if tmp.lower() == name.lower():
|
||||
return f
|
||||
elif f.name.lower() == name.lower():
|
||||
return f
|
||||
offset += f.length
|
||||
return None
|
||||
|
||||
class FAT(object):
|
||||
|
||||
def __init__(self, iso, offset):
|
||||
self.iso = iso
|
||||
self.offset = offset
|
||||
|
||||
let _
|
||||
self.bytespersector, _ = read_struct('H', self.iso.data, offset + 11)
|
||||
self.sectorspercluster, _ = read_struct('B', self.iso.data, offset + 13)
|
||||
self.reservedsectors, _ = read_struct('H', self.iso.data, offset + 14)
|
||||
self.numberoffats, _ = read_struct('B', self.iso.data, offset + 16)
|
||||
self.numberofdirs, _ = read_struct('H', self.iso.data, offset + 17)
|
||||
self.fatsize, _ = read_struct('H', self.iso.data, offset + 22)
|
||||
|
||||
self.root_dir_sectors = (self.numberofdirs * 32 + (self.bytespersector - 1)) // self.bytespersector
|
||||
self.first_data_sector = self.reservedsectors + (self.numberoffats * self.fatsize) + self.root_dir_sectors
|
||||
self.root_sector= self.first_data_sector - self.root_dir_sectors
|
||||
self.root = FATDirectory(self, self.offset + self.root_sector * self.bytespersector)
|
||||
|
||||
def get_offset(self, cluster):
|
||||
return self.offset + ((cluster - 2) * self.sectorspercluster + self.first_data_sector) * self.bytespersector
|
||||
|
||||
def get_file(self, path):
|
||||
let units = path.split('/')
|
||||
units = units[1:]
|
||||
|
||||
let me = self.root
|
||||
let out = None
|
||||
for i in units:
|
||||
for fatfile in me.list():
|
||||
if fatfile.readable_name() == i:
|
||||
me = fatfile.to_dir()
|
||||
out = fatfile
|
||||
break
|
||||
return out
|
||||
|
||||
class FATDirectory(object):
|
||||
|
||||
def __init__(self, fat, offset):
|
||||
self.fat = fat
|
||||
self.offset = offset
|
||||
|
||||
def list(self):
|
||||
let o = self.offset
|
||||
while 1:
|
||||
let out = FATFile(self.fat, o)
|
||||
if out.name != '\0\0\0\0\0\0\0\0':
|
||||
yield out
|
||||
else:
|
||||
break
|
||||
o += out.size
|
||||
|
||||
|
||||
class FATFile(object):
|
||||
|
||||
def __init__(self, fat, offset):
|
||||
|
||||
self.fat = fat
|
||||
self.offset = offset
|
||||
self.magic_long = None
|
||||
self.size = 0
|
||||
self.long_name = ''
|
||||
|
||||
let o = self.offset
|
||||
self.actual_offset = o
|
||||
|
||||
let _
|
||||
self.attrib, _ = read_struct('B',self.fat.iso.data,o+11)
|
||||
|
||||
while (self.attrib & 0x0F) == 0x0F:
|
||||
# Long file name entry
|
||||
let tmp = read_struct('10s',self.fat.iso.data,o+1)[0]
|
||||
tmp += read_struct('12s',self.fat.iso.data,o+14)[0]
|
||||
tmp += read_struct('4s',self.fat.iso.data,o+28)[0]
|
||||
let s = []
|
||||
for i = 0; i < len(tmp); i += 2:
|
||||
if tmp[x] != '\xFF':
|
||||
s.append(chr(tmp[x]))
|
||||
tmp = "".join(s).strip('\x00')
|
||||
self.long_name = tmp + self.long_name
|
||||
self.size += 32
|
||||
o = self.offset + self.size
|
||||
self.actual_offset = o
|
||||
self.attrib, _ = read_struct('B',self.fat.iso.data,o+11)
|
||||
|
||||
o = self.offset + self.size
|
||||
|
||||
self.name, o = read_struct('8s',self.fat.iso.data,o)
|
||||
self.ext, o = read_struct('3s',self.fat.iso.data,o)
|
||||
self.attrib, o = read_struct('B',self.fat.iso.data,o)
|
||||
self.userattrib, o = read_struct('B',self.fat.iso.data,o)
|
||||
self.undelete, o = read_struct('b',self.fat.iso.data,o)
|
||||
self.createtime, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.createdate, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.accessdate, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.clusterhi, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.modifiedti, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.modifiedda, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.clusterlow, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.filesize, o = read_struct('I',self.fat.iso.data,o)
|
||||
|
||||
self.name = self.name.decode()
|
||||
self.ext = self.ext.decode()
|
||||
|
||||
self.size += 32
|
||||
|
||||
self.cluster = (self.clusterhi << 16) + self.clusterlow
|
||||
|
||||
def is_dir(self):
|
||||
return bool(self.attrib & 0x10)
|
||||
|
||||
def is_long(self):
|
||||
return bool((self.attrib & 0x0F) == 0x0F)
|
||||
|
||||
def to_dir(self):
|
||||
return FATDirectory(self.fat, self.fat.get_offset(self.cluster))
|
||||
|
||||
def get_offset(self):
|
||||
return self.fat.get_offset(self.cluster)
|
||||
|
||||
def readable_name(self):
|
||||
if self.long_name:
|
||||
return self.long_name
|
||||
if self.ext.strip():
|
||||
return (self.name.strip() + '.' + self.ext.strip()).lower()
|
||||
else:
|
||||
return self.name.strip().lower()
|
||||
|
||||
@ -1,241 +1,5 @@
|
||||
#!/usr/bin/env kuroko
|
||||
import fileio
|
||||
|
||||
def to_int(little: bool, data: bytes):
|
||||
let out = 0
|
||||
if little: data = reversed(data)
|
||||
for x in data:
|
||||
out *= 0x100
|
||||
out += x
|
||||
return out
|
||||
|
||||
def to_bytes(little: bool, val: int, length: int):
|
||||
let out = [0] * length
|
||||
let i = 0
|
||||
while val and i < length:
|
||||
out[i] = val & 0xFF
|
||||
val >>= 8
|
||||
i++
|
||||
if not little:
|
||||
out = reversed(out)
|
||||
return bytes(out)
|
||||
|
||||
def read_struct(fmt: str, data: bytes, offset: int):
|
||||
if not fmt or not isinstance(fmt,str):
|
||||
raise ValueError
|
||||
# First, read the endianness
|
||||
let littleEndian = True
|
||||
if fmt[0] in '@<>#!':
|
||||
if fmt[0] == '>': littleEndian = False
|
||||
else if fmt[0] == '!': littleEndian = False
|
||||
fmt = fmt[1:]
|
||||
# Then read length
|
||||
let length = None
|
||||
if fmt[0] in '0123456789':
|
||||
length = int(fmt[0])
|
||||
fmt = fmt[1:]
|
||||
while fmt[0] in '012345679':
|
||||
length *= 10
|
||||
length += int(fmt[0])
|
||||
fmt = fmt[1:]
|
||||
# Then read type
|
||||
if fmt[0] == 'B':
|
||||
return int(data[offset]), offset + 1
|
||||
else if fmt[0] == 'b':
|
||||
let out = int(data[offset])
|
||||
if out > 0x7F: out = -out
|
||||
return out, offset + 1
|
||||
else if fmt[0] == 's':
|
||||
return bytes([data[x] for x in range(offset,offset+length)]), offset + length
|
||||
else if fmt[0] == 'I':
|
||||
return to_int(littleEndian, bytes([data[x] for x in range(offset,offset+4)])), offset + 4
|
||||
else if fmt[0] == 'H':
|
||||
return to_int(littleEndian, bytes([data[x] for x in range(offset,offset+2)])), offset + 2
|
||||
raise ValueError("Huh")
|
||||
|
||||
def pack_into(fmt: str, data: bytes, offset: int, val: any):
|
||||
if not fmt or not isinstance(fmt,str):
|
||||
raise ValueError
|
||||
# First, read the endianness
|
||||
let littleEndian = True
|
||||
if fmt[0] in '@<>#!':
|
||||
if fmt[0] == '>': littleEndian = False
|
||||
else if fmt[0] == '!': littleEndian = False
|
||||
fmt = fmt[1:]
|
||||
# Then read length
|
||||
let length = None
|
||||
if fmt[0] in '0123456789':
|
||||
length = int(fmt[0])
|
||||
fmt = fmt[1:]
|
||||
while fmt[0] in '012345679':
|
||||
length *= 10
|
||||
length += int(fmt[0])
|
||||
fmt = fmt[1:]
|
||||
# Then read type
|
||||
if fmt[0] == 'B':
|
||||
data[offset] = val
|
||||
return offset + 1
|
||||
else if fmt[0] == 'b':
|
||||
data[offset] = val
|
||||
return offset + 1
|
||||
else if fmt[0] == 's':
|
||||
for x in range(length):
|
||||
data[offset+x] = val[x]
|
||||
return offset + length
|
||||
else if fmt[0] == 'I':
|
||||
for x in to_bytes(littleEndian, val, 4):
|
||||
data[offset] = x
|
||||
offset++
|
||||
return offset
|
||||
else if fmt[0] == 'H':
|
||||
for x in to_bytes(littleEndian, val, 2):
|
||||
data[offset] = x
|
||||
offset++
|
||||
return offset
|
||||
raise ValueError("Huh")
|
||||
|
||||
class ISO(object):
|
||||
|
||||
def __init__(self, path):
|
||||
let data
|
||||
with fileio.open(path, 'rb') as f:
|
||||
self.data = bytearray(f.read())
|
||||
self.sector_size = 2048
|
||||
let o = 0x10 * self.sector_size
|
||||
let _unused
|
||||
self.type, o = read_struct('B',self.data,o)
|
||||
self.id, o = read_struct('5s',self.data,o)
|
||||
self.version, o = read_struct('B',self.data,o)
|
||||
_unused, o = read_struct('B',self.data,o)
|
||||
self.system_id, o = read_struct('32s',self.data,o)
|
||||
self.volume_id, o = read_struct('32s',self.data,o)
|
||||
_unused, o = read_struct('8s',self.data,o)
|
||||
self.volume_space_lsb, o = read_struct('<I',self.data,o)
|
||||
self.volume_space_msb, o = read_struct('>I',self.data,o)
|
||||
_unused, o = read_struct('32s',self.data,o)
|
||||
self.volume_set_lsb, o = read_struct('<H',self.data,o)
|
||||
self.volume_set_msb, o = read_struct('>H',self.data,o)
|
||||
self.volume_seq_lsb, o = read_struct('<H',self.data,o)
|
||||
self.volume_seq_msb, o = read_struct('>H',self.data,o)
|
||||
self.logical_block_size_lsb, o = read_struct('<H',self.data,o)
|
||||
self.logical_block_size_msb, o = read_struct('>H',self.data,o)
|
||||
self.path_table_size_lsb, o = read_struct('<I',self.data,o)
|
||||
self.path_table_size_msb, o = read_struct('>I',self.data,o)
|
||||
self.path_table_lsb, o = read_struct('<I',self.data,o)
|
||||
self.optional_path_table_lsb, o = read_struct('<I',self.data,o)
|
||||
self.path_table_msb, o = read_struct('>I',self.data,o)
|
||||
self.optional_path_table_msb, o = read_struct('>I',self.data,o)
|
||||
let _offset = o
|
||||
self.root_dir_entry, o = read_struct('34s',self.data,o)
|
||||
|
||||
self.root = ISOFile(self,_offset)
|
||||
self._cache = {}
|
||||
|
||||
def get_file(self, path):
|
||||
if path == '/':
|
||||
return self.root
|
||||
else:
|
||||
if path in self._cache:
|
||||
return self._cache[path]
|
||||
let units = path.split('/')
|
||||
units = units[1:] # remove root
|
||||
let me = self.root
|
||||
for i in units:
|
||||
let next_file = me.find(i)
|
||||
if not next_file:
|
||||
me = None
|
||||
break
|
||||
else:
|
||||
me = next_file
|
||||
self._cache[path] = me
|
||||
return me
|
||||
|
||||
class ISOFile(object):
|
||||
|
||||
def __init__(self, iso, offset):
|
||||
self.iso = iso
|
||||
self.offset = offset
|
||||
|
||||
let o = offset
|
||||
self.length, o = read_struct('B', self.iso.data, o)
|
||||
if not self.length:
|
||||
return
|
||||
self.ext_length, o = read_struct('B', self.iso.data, o)
|
||||
self.extent_start_lsb, o = read_struct('<I',self.iso.data, o)
|
||||
self.extent_start_msb, o = read_struct('>I',self.iso.data, o)
|
||||
self.extent_length_lsb, o = read_struct('<I',self.iso.data, o)
|
||||
self.extent_length_msb, o = read_struct('>I',self.iso.data, o)
|
||||
|
||||
self.date_data, o = read_struct('7s', self.iso.data, o)
|
||||
|
||||
self.flags, o = read_struct('b', self.iso.data, o)
|
||||
self.interleave_units, o = read_struct('b', self.iso.data, o)
|
||||
self.interleave_gap, o = read_struct('b', self.iso.data, o)
|
||||
|
||||
self.volume_seq_lsb, o = read_struct('<H',self.iso.data, o)
|
||||
self.volume_seq_msb, o = read_struct('>H',self.iso.data, o)
|
||||
|
||||
self.name_len, o = read_struct('b', self.iso.data, o)
|
||||
self.name, o = read_struct('{}s'.format(self.name_len), self.iso.data, o)
|
||||
self.name = self.name.decode()
|
||||
|
||||
def __str__(self):
|
||||
return f'<ISOFile name={self.name} start={self.extent_start_lsb * self.iso.sector_size} length={self.extent_length_lsb}>'
|
||||
|
||||
def write_extents(self):
|
||||
pack_into('<I', self.iso.data, self.offset + 2, self.extent_start_lsb)
|
||||
pack_into('>I', self.iso.data, self.offset + 6, self.extent_start_lsb)
|
||||
pack_into('<I', self.iso.data, self.offset + 10, self.extent_length_lsb)
|
||||
pack_into('>I', self.iso.data, self.offset + 14, self.extent_length_lsb)
|
||||
|
||||
def readable_name(self):
|
||||
if not ';' in self.name:
|
||||
return self.name.lower()
|
||||
else:
|
||||
let tmp, _
|
||||
tmp, _ = self.name.split(';')
|
||||
return tmp.lower()
|
||||
|
||||
|
||||
def list(self):
|
||||
let sectors = self.iso.data[self.extent_start_lsb * self.iso.sector_size: self.extent_start_lsb * self.iso.sector_size+ 3 * self.iso.sector_size]
|
||||
let offset = 0
|
||||
|
||||
while 1:
|
||||
let f = ISOFile(self.iso, self.extent_start_lsb * self.iso.sector_size + offset)
|
||||
yield f
|
||||
offset += f.length
|
||||
if not f.length:
|
||||
break
|
||||
|
||||
def find(self, name):
|
||||
let sectors = self.iso.data[self.extent_start_lsb * self.iso.sector_size: self.extent_start_lsb * self.iso.sector_size+ 3 * self.iso.sector_size]
|
||||
let offset = 0
|
||||
if '.' in name and len(name.split('.')[0]) > 8:
|
||||
let a, b
|
||||
a, b = name.split('.')
|
||||
name = a[:8] + '.' + b
|
||||
if '-' in name:
|
||||
name = name.replace('-','_')
|
||||
while 1:
|
||||
let f = ISOFile(self.iso, self.extent_start_lsb * self.iso.sector_size + offset)
|
||||
if not f.length:
|
||||
if offset < self.extent_length_lsb:
|
||||
offset += 1
|
||||
continue
|
||||
else:
|
||||
break
|
||||
if ';' in f.name:
|
||||
let tmp, _
|
||||
tmp, _ = f.name.split(';')
|
||||
if tmp.endswith('.'):
|
||||
tmp = tmp[:-1]
|
||||
if tmp.lower() == name.lower():
|
||||
return f
|
||||
elif f.name.lower() == name.lower():
|
||||
return f
|
||||
offset += f.length
|
||||
return None
|
||||
from util import ISO
|
||||
|
||||
let image = ISO('image.iso')
|
||||
let cdfile = image.get_file('/boot.sys')
|
||||
|
||||
@ -1,366 +1,6 @@
|
||||
#!/usr/bin/env kuroko
|
||||
import fileio
|
||||
|
||||
def to_int(little: bool, data: bytes):
|
||||
let out = 0
|
||||
if little: data = reversed(data)
|
||||
for x in data:
|
||||
out *= 0x100
|
||||
out += x
|
||||
return out
|
||||
|
||||
def to_bytes(little: bool, val: int, length: int):
|
||||
let out = [0] * length
|
||||
let i = 0
|
||||
while val and i < length:
|
||||
out[i] = val & 0xFF
|
||||
val >>= 8
|
||||
i++
|
||||
if not little:
|
||||
out = reversed(out)
|
||||
return bytes(out)
|
||||
|
||||
def read_struct(fmt: str, data: bytes, offset: int):
|
||||
if not fmt or not isinstance(fmt,str):
|
||||
raise ValueError
|
||||
# First, read the endianness
|
||||
let littleEndian = True
|
||||
if fmt[0] in '@<>#!':
|
||||
if fmt[0] == '>': littleEndian = False
|
||||
else if fmt[0] == '!': littleEndian = False
|
||||
fmt = fmt[1:]
|
||||
# Then read length
|
||||
let length = None
|
||||
if fmt[0] in '0123456789':
|
||||
length = int(fmt[0])
|
||||
fmt = fmt[1:]
|
||||
while fmt[0] in '012345679':
|
||||
length *= 10
|
||||
length += int(fmt[0])
|
||||
fmt = fmt[1:]
|
||||
# Then read type
|
||||
if fmt[0] == 'B':
|
||||
return int(data[offset]), offset + 1
|
||||
else if fmt[0] == 'b':
|
||||
let out = int(data[offset])
|
||||
if out > 0x7F: out = -out
|
||||
return out, offset + 1
|
||||
else if fmt[0] == 's':
|
||||
return bytes([data[x] for x in range(offset,offset+length)]), offset + length
|
||||
else if fmt[0] == 'I':
|
||||
return to_int(littleEndian, bytes([data[x] for x in range(offset,offset+4)])), offset + 4
|
||||
else if fmt[0] == 'H':
|
||||
return to_int(littleEndian, bytes([data[x] for x in range(offset,offset+2)])), offset + 2
|
||||
raise ValueError("Huh")
|
||||
|
||||
def pack_into(fmt: str, data: bytes, offset: int, val: any):
|
||||
if not fmt or not isinstance(fmt,str):
|
||||
raise ValueError
|
||||
# First, read the endianness
|
||||
let littleEndian = True
|
||||
if fmt[0] in '@<>#!':
|
||||
if fmt[0] == '>': littleEndian = False
|
||||
else if fmt[0] == '!': littleEndian = False
|
||||
fmt = fmt[1:]
|
||||
# Then read length
|
||||
let length = None
|
||||
if fmt[0] in '0123456789':
|
||||
length = int(fmt[0])
|
||||
fmt = fmt[1:]
|
||||
while fmt[0] in '012345679':
|
||||
length *= 10
|
||||
length += int(fmt[0])
|
||||
fmt = fmt[1:]
|
||||
# Then read type
|
||||
if fmt[0] == 'B':
|
||||
data[offset] = val
|
||||
return offset + 1
|
||||
else if fmt[0] == 'b':
|
||||
data[offset] = val
|
||||
return offset + 1
|
||||
else if fmt[0] == 's':
|
||||
for x in range(length):
|
||||
data[offset+x] = val[x]
|
||||
return offset + length
|
||||
else if fmt[0] == 'I':
|
||||
for x in to_bytes(littleEndian, val, 4):
|
||||
data[offset] = x
|
||||
offset++
|
||||
return offset
|
||||
else if fmt[0] == 'H':
|
||||
for x in to_bytes(littleEndian, val, 2):
|
||||
data[offset] = x
|
||||
offset++
|
||||
return offset
|
||||
raise ValueError("Huh")
|
||||
|
||||
class ISO(object):
|
||||
|
||||
def __init__(self, path):
|
||||
let data
|
||||
with fileio.open(path, 'rb') as f:
|
||||
self.data = bytearray(f.read())
|
||||
self.sector_size = 2048
|
||||
let o = 0x10 * self.sector_size
|
||||
let _unused
|
||||
self.type, o = read_struct('B',self.data,o)
|
||||
self.id, o = read_struct('5s',self.data,o)
|
||||
self.version, o = read_struct('B',self.data,o)
|
||||
_unused, o = read_struct('B',self.data,o)
|
||||
self.system_id, o = read_struct('32s',self.data,o)
|
||||
self.volume_id, o = read_struct('32s',self.data,o)
|
||||
_unused, o = read_struct('8s',self.data,o)
|
||||
self.volume_space_lsb, o = read_struct('<I',self.data,o)
|
||||
self.volume_space_msb, o = read_struct('>I',self.data,o)
|
||||
_unused, o = read_struct('32s',self.data,o)
|
||||
self.volume_set_lsb, o = read_struct('<H',self.data,o)
|
||||
self.volume_set_msb, o = read_struct('>H',self.data,o)
|
||||
self.volume_seq_lsb, o = read_struct('<H',self.data,o)
|
||||
self.volume_seq_msb, o = read_struct('>H',self.data,o)
|
||||
self.logical_block_size_lsb, o = read_struct('<H',self.data,o)
|
||||
self.logical_block_size_msb, o = read_struct('>H',self.data,o)
|
||||
self.path_table_size_lsb, o = read_struct('<I',self.data,o)
|
||||
self.path_table_size_msb, o = read_struct('>I',self.data,o)
|
||||
self.path_table_lsb, o = read_struct('<I',self.data,o)
|
||||
self.optional_path_table_lsb, o = read_struct('<I',self.data,o)
|
||||
self.path_table_msb, o = read_struct('>I',self.data,o)
|
||||
self.optional_path_table_msb, o = read_struct('>I',self.data,o)
|
||||
let _offset = o
|
||||
self.root_dir_entry, o = read_struct('34s',self.data,o)
|
||||
|
||||
self.root = ISOFile(self,_offset)
|
||||
self._cache = {}
|
||||
|
||||
def get_file(self, path):
|
||||
if path == '/':
|
||||
return self.root
|
||||
else:
|
||||
if path in self._cache:
|
||||
return self._cache[path]
|
||||
let units = path.split('/')
|
||||
units = units[1:] # remove root
|
||||
let me = self.root
|
||||
for i in units:
|
||||
let next_file = me.find(i)
|
||||
if not next_file:
|
||||
me = None
|
||||
break
|
||||
else:
|
||||
me = next_file
|
||||
self._cache[path] = me
|
||||
return me
|
||||
|
||||
class ISOFile(object):
|
||||
|
||||
def __init__(self, iso, offset):
|
||||
self.iso = iso
|
||||
self.offset = offset
|
||||
|
||||
let o = offset
|
||||
self.length, o = read_struct('B', self.iso.data, o)
|
||||
if not self.length:
|
||||
return
|
||||
self.ext_length, o = read_struct('B', self.iso.data, o)
|
||||
self.extent_start_lsb, o = read_struct('<I',self.iso.data, o)
|
||||
self.extent_start_msb, o = read_struct('>I',self.iso.data, o)
|
||||
self.extent_length_lsb, o = read_struct('<I',self.iso.data, o)
|
||||
self.extent_length_msb, o = read_struct('>I',self.iso.data, o)
|
||||
|
||||
self.date_data, o = read_struct('7s', self.iso.data, o)
|
||||
|
||||
self.flags, o = read_struct('b', self.iso.data, o)
|
||||
self.interleave_units, o = read_struct('b', self.iso.data, o)
|
||||
self.interleave_gap, o = read_struct('b', self.iso.data, o)
|
||||
|
||||
self.volume_seq_lsb, o = read_struct('<H',self.iso.data, o)
|
||||
self.volume_seq_msb, o = read_struct('>H',self.iso.data, o)
|
||||
|
||||
self.name_len, o = read_struct('b', self.iso.data, o)
|
||||
self.name, o = read_struct('{}s'.format(self.name_len), self.iso.data, o)
|
||||
self.name = self.name.decode()
|
||||
|
||||
def write_extents(self):
|
||||
pack_into('<I', self.iso.data, self.offset + 2, self.extent_start_lsb)
|
||||
pack_into('>I', self.iso.data, self.offset + 6, self.extent_start_lsb)
|
||||
pack_into('<I', self.iso.data, self.offset + 10, self.extent_length_lsb)
|
||||
pack_into('>I', self.iso.data, self.offset + 14, self.extent_length_lsb)
|
||||
|
||||
def readable_name(self):
|
||||
if not ';' in self.name:
|
||||
return self.name.lower()
|
||||
else:
|
||||
let tmp, _
|
||||
tmp, _ = self.name.split(';')
|
||||
return tmp.lower()
|
||||
|
||||
|
||||
def list(self):
|
||||
let sectors = self.iso.data[self.extent_start_lsb * self.iso.sector_size: self.extent_start_lsb * self.iso.sector_size+ 3 * self.iso.sector_size]
|
||||
let offset = 0
|
||||
|
||||
while 1:
|
||||
let f = ISOFile(self.iso, self.extent_start_lsb * self.iso.sector_size + offset)
|
||||
yield f
|
||||
offset += f.length
|
||||
if not f.length:
|
||||
break
|
||||
|
||||
def find(self, name):
|
||||
let sectors = self.iso.data[self.extent_start_lsb * self.iso.sector_size: self.extent_start_lsb * self.iso.sector_size+ 3 * self.iso.sector_size]
|
||||
let offset = 0
|
||||
if '.' in name and len(name.split('.')[0]) > 8:
|
||||
let a, b
|
||||
a, b = name.split('.')
|
||||
name = a[:8] + '.' + b
|
||||
if '-' in name:
|
||||
name = name.replace('-','_')
|
||||
while 1:
|
||||
let f = ISOFile(self.iso, self.extent_start_lsb * self.iso.sector_size + offset)
|
||||
if not f.length:
|
||||
if offset < self.extent_length_lsb:
|
||||
offset += 1
|
||||
continue
|
||||
else:
|
||||
break
|
||||
if ';' in f.name:
|
||||
let tmp, _
|
||||
tmp, _ = f.name.split(';')
|
||||
if tmp.endswith('.'):
|
||||
tmp = tmp[:-1]
|
||||
if tmp.lower() == name.lower():
|
||||
return f
|
||||
elif f.name.lower() == name.lower():
|
||||
return f
|
||||
offset += f.length
|
||||
return None
|
||||
|
||||
class FAT(object):
|
||||
|
||||
def __init__(self, iso, offset):
|
||||
self.iso = iso
|
||||
self.offset = offset
|
||||
|
||||
let _
|
||||
self.bytespersector, _ = read_struct('H', self.iso.data, offset + 11)
|
||||
self.sectorspercluster, _ = read_struct('B', self.iso.data, offset + 13)
|
||||
self.reservedsectors, _ = read_struct('H', self.iso.data, offset + 14)
|
||||
self.numberoffats, _ = read_struct('B', self.iso.data, offset + 16)
|
||||
self.numberofdirs, _ = read_struct('H', self.iso.data, offset + 17)
|
||||
self.fatsize, _ = read_struct('H', self.iso.data, offset + 22)
|
||||
|
||||
self.root_dir_sectors = (self.numberofdirs * 32 + (self.bytespersector - 1)) // self.bytespersector
|
||||
self.first_data_sector = self.reservedsectors + (self.numberoffats * self.fatsize) + self.root_dir_sectors
|
||||
self.root_sector= self.first_data_sector - self.root_dir_sectors
|
||||
self.root = FATDirectory(self, self.offset + self.root_sector * self.bytespersector)
|
||||
|
||||
def get_offset(self, cluster):
|
||||
return self.offset + ((cluster - 2) * self.sectorspercluster + self.first_data_sector) * self.bytespersector
|
||||
|
||||
def get_file(self, path):
|
||||
let units = path.split('/')
|
||||
units = units[1:]
|
||||
|
||||
let me = self.root
|
||||
let out = None
|
||||
for i in units:
|
||||
for fatfile in me.list():
|
||||
if fatfile.readable_name() == i:
|
||||
me = fatfile.to_dir()
|
||||
out = fatfile
|
||||
break
|
||||
return out
|
||||
|
||||
class FATDirectory(object):
|
||||
|
||||
def __init__(self, fat, offset):
|
||||
self.fat = fat
|
||||
self.offset = offset
|
||||
|
||||
def list(self):
|
||||
let o = self.offset
|
||||
while 1:
|
||||
let out = FATFile(self.fat, o)
|
||||
if out.name != '\0\0\0\0\0\0\0\0':
|
||||
yield out
|
||||
else:
|
||||
break
|
||||
o += out.size
|
||||
|
||||
|
||||
class FATFile(object):
|
||||
|
||||
def __init__(self, fat, offset):
|
||||
|
||||
self.fat = fat
|
||||
self.offset = offset
|
||||
self.magic_long = None
|
||||
self.size = 0
|
||||
self.long_name = ''
|
||||
|
||||
let o = self.offset
|
||||
self.actual_offset = o
|
||||
|
||||
let _
|
||||
self.attrib, _ = read_struct('B',self.fat.iso.data,o+11)
|
||||
|
||||
while (self.attrib & 0x0F) == 0x0F:
|
||||
# Long file name entry
|
||||
let tmp = read_struct('10s',self.fat.iso.data,o+1)[0]
|
||||
tmp += read_struct('12s',self.fat.iso.data,o+14)[0]
|
||||
tmp += read_struct('4s',self.fat.iso.data,o+28)[0]
|
||||
let s = []
|
||||
for i = 0; i < len(tmp); i += 2:
|
||||
if tmp[x] != '\xFF':
|
||||
s.append(chr(tmp[x]))
|
||||
tmp = "".join(s).strip('\x00')
|
||||
self.long_name = tmp + self.long_name
|
||||
self.size += 32
|
||||
o = self.offset + self.size
|
||||
self.actual_offset = o
|
||||
self.attrib, _ = read_struct('B',self.fat.iso.data,o+11)
|
||||
|
||||
o = self.offset + self.size
|
||||
|
||||
self.name, o = read_struct('8s',self.fat.iso.data,o)
|
||||
self.ext, o = read_struct('3s',self.fat.iso.data,o)
|
||||
self.attrib, o = read_struct('B',self.fat.iso.data,o)
|
||||
self.userattrib, o = read_struct('B',self.fat.iso.data,o)
|
||||
self.undelete, o = read_struct('b',self.fat.iso.data,o)
|
||||
self.createtime, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.createdate, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.accessdate, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.clusterhi, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.modifiedti, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.modifiedda, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.clusterlow, o = read_struct('H',self.fat.iso.data,o)
|
||||
self.filesize, o = read_struct('I',self.fat.iso.data,o)
|
||||
|
||||
self.name = self.name.decode()
|
||||
self.ext = self.ext.decode()
|
||||
|
||||
self.size += 32
|
||||
|
||||
self.cluster = (self.clusterhi << 16) + self.clusterlow
|
||||
|
||||
def is_dir(self):
|
||||
return bool(self.attrib & 0x10)
|
||||
|
||||
def is_long(self):
|
||||
return bool((self.attrib & 0x0F) == 0x0F)
|
||||
|
||||
def to_dir(self):
|
||||
return FATDirectory(self.fat, self.fat.get_offset(self.cluster))
|
||||
|
||||
def get_offset(self):
|
||||
return self.fat.get_offset(self.cluster)
|
||||
|
||||
def readable_name(self):
|
||||
if self.long_name:
|
||||
return self.long_name
|
||||
if self.ext.strip():
|
||||
return (self.name.strip() + '.' + self.ext.strip()).lower()
|
||||
else:
|
||||
return self.name.strip().lower()
|
||||
from util import ISO, FAT
|
||||
|
||||
let image = ISO('image.iso')
|
||||
let fat = image.root.find('FAT.IMG')
|
||||
|
||||
Loading…
Reference in New Issue
Block a user