mirror of
https://github.com/KrisKennaway/pyapple2disk.git
synced 2024-11-26 10:49:19 +00:00
disk.py
- Support specializations of Sector, and promoting from Sector to a subclass by the Sector.fromSector() classmethod - have the Sector() __init__ method register itself with the disk via disk.SetSectorOwner() - Add a disk.RWTS sector type - Add a disk.Taste classmethod that attempts to interpret a disk as a subclass, which may be rejected dos33disk.py - Read the VTOC, Catalog, File metadata and file content sectors and claim them in the disk process.py - moved the main() method here to iterate over disk images under a directory and attempt to taste them as DOS 3.3 disks
This commit is contained in:
kris
parent
c66456a9e5
commit
6ae678890c
@ -1,7 +1,5 @@
|
||||
import bitstring
|
||||
import hashlib
|
||||
import os
|
||||
import sys
|
||||
import zlib
|
||||
|
||||
SECTOR_SIZE = 256
|
||||
@ -24,9 +22,24 @@ class Disk(object):
|
||||
self.hash = hashlib.sha1(data).hexdigest()
|
||||
|
||||
self.sectors = {}
|
||||
for (track, sector) in self.EnumerateSectors():
|
||||
self._ReadSector(track, sector)
|
||||
|
||||
# Assign ownership of T0, S0 to RWTS
|
||||
self.rwts = RWTS.fromSector(self.ReadSector(0, 0))
|
||||
|
||||
@classmethod
|
||||
def Taste(cls, disk):
|
||||
# TODO: return a defined exception here
|
||||
return cls(disk.name, disk.data)
|
||||
|
||||
def SetSectorOwner(self, track, sector, owner):
|
||||
self.sectors[(track, sector)] = owner
|
||||
|
||||
def EnumerateSectors(self):
|
||||
for track in xrange(TRACKS_PER_DISK):
|
||||
for sector in xrange(SECTORS_PER_TRACK):
|
||||
self.sectors[(track, sector)] = self._ReadSector(track, sector)
|
||||
yield (track, sector)
|
||||
|
||||
def _ReadSector(self, track, sector):
|
||||
offset = track * TRACK_SIZE + sector * SECTOR_SIZE
|
||||
@ -42,11 +55,11 @@ class Disk(object):
|
||||
except KeyError:
|
||||
raise IOError("Track $%02x sector $%02x out of bounds" % (track, sector))
|
||||
|
||||
def RWTS(self):
|
||||
return self.sectors[(0,0)]
|
||||
|
||||
|
||||
class Sector(object):
|
||||
# TODO: other types will include: VTOC, Catalog, File metadata, File content, Deleted file, Free space
|
||||
TYPE = 'Unknown sector'
|
||||
|
||||
def __init__(self, disk, track, sector, data):
|
||||
# Reference back to parent disk
|
||||
self.disk = disk
|
||||
@ -61,6 +74,16 @@ class Sector(object):
|
||||
compressed_data = zlib.compress(data.tobytes())
|
||||
self.compress_ratio = len(compressed_data) * 100 / len(data.tobytes())
|
||||
|
||||
disk.SetSectorOwner(track, sector, self)
|
||||
|
||||
# TODO: if all callers are using disk.ReadSector(track, sector) to get the sector then do that here
|
||||
@classmethod
|
||||
def fromSector(cls, sector, *args, **kwargs):
|
||||
"""Create and register a new Sector from an existing Sector object."""
|
||||
# TODO: don't recompute hash and entropy
|
||||
return cls(sector.disk, sector.track, sector.sector, sector.data, *args, **kwargs)
|
||||
|
||||
# TOOD: move RWTS ones into RWTS() class?
|
||||
KNOWN_HASHES = {
|
||||
'b376885ac8452b6cbf9ced81b1080bfd570d9b91': 'Zero sector',
|
||||
'90e6b1a0689974743cb92ca0b833ff1e683f4a73': 'RWTS (DOS 3.3 August 1980)',
|
||||
@ -81,38 +104,11 @@ class Sector(object):
|
||||
return human_name
|
||||
|
||||
def __str__(self):
|
||||
return "Track $%02x Sector $%02x: %s" % (self.track, self.sector, self.HumanName())
|
||||
return "Track $%02x Sector $%02x: %s (%s)" % (self.track, self.sector, self.TYPE, self.HumanName())
|
||||
|
||||
def main():
|
||||
disks = {}
|
||||
for root, dirs, files in os.walk(sys.argv[1]):
|
||||
for f in files:
|
||||
if not f.lower().endswith('.dsk') and not f.lower().endswith('.do'):
|
||||
continue
|
||||
|
||||
print f
|
||||
b = bytearray(open(os.path.join(root, f), 'r').read())
|
||||
try:
|
||||
disk = Disk(f, b)
|
||||
disks[f] = disk
|
||||
except IOError:
|
||||
continue
|
||||
except AssertionError:
|
||||
continue
|
||||
class RWTS(Sector):
|
||||
TYPE = "RWTS"
|
||||
|
||||
for ts, data in sorted(disk.sectors.iteritems()):
|
||||
print data
|
||||
|
||||
# Group disks by hash of RWTS sector
|
||||
rwts_hashes = {}
|
||||
for f, d in disks.iteritems():
|
||||
rwts_hash = d.RWTS().hash
|
||||
rwts_hashes.setdefault(rwts_hash, []).append(f)
|
||||
|
||||
for h, disks in rwts_hashes.iteritems():
|
||||
print h
|
||||
for d in sorted(disks):
|
||||
print " %s" % d
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
def __init__(self, disk, track, sector, data):
|
||||
super(RWTS, self).__init__(disk, track, sector, data)
|
||||
|
||||
230
src/apple2disk/dos33disk.py
Normal file
230
src/apple2disk/dos33disk.py
Normal file
@ -0,0 +1,230 @@
|
||||
import bitstring
|
||||
import disk as disklib
|
||||
import string
|
||||
|
||||
PRINTABLE = set(string.letters + string.digits + string.punctuation + ' ')
|
||||
|
||||
class File(object):
|
||||
def __init__(self, short_type, long_type):
|
||||
self.short_type = short_type
|
||||
self.long_type = long_type
|
||||
|
||||
FILE_TYPES = {
|
||||
0x00: File('T', 'TEXT'),
|
||||
0x01: File('I', 'INTEGER BASIC'),
|
||||
# TODO: add handler for parsing file content
|
||||
0x02: File('A', 'APPLESOFT BASIC'),
|
||||
0x04: File('B', 'BINARY'),
|
||||
# TODO: others
|
||||
}
|
||||
|
||||
class VTOCSector(disklib.Sector):
|
||||
TYPE = 'DOS 3.3 VTOC'
|
||||
|
||||
def __init__(self, disk, track, sector, data):
|
||||
super(VTOCSector, self).__init__(disk, track, sector, data)
|
||||
(
|
||||
catalog_track, catalog_sector, dos_release, volume, max_track_sector_pairs,
|
||||
last_track_allocated, track_direction, tracks_per_disk, sectors_per_track,
|
||||
bytes_per_sector, freemap
|
||||
) = data.unpack(
|
||||
'pad:8, uint:8, uint:8, uint:8, pad:16, uint:8, pad:256, uint:8, pad:64, uint:8, ' +
|
||||
'int:8, pad:16, uint:8, uint:8, uintle:16, bits:1600'
|
||||
)
|
||||
|
||||
# TODO: throw a better exception here to reject the identification as a DOS 3.3 disk
|
||||
assert dos_release == 3
|
||||
assert bytes_per_sector == disklib.SECTOR_SIZE
|
||||
assert sectors_per_track == disklib.SECTORS_PER_TRACK
|
||||
|
||||
self.catalog_track = catalog_track
|
||||
self.catalog_sector = catalog_sector
|
||||
|
||||
# TODO: why does DOS 3.3 sometimes display e.g. volume 254 when the VTOC says 178
|
||||
self.volume = volume
|
||||
|
||||
|
||||
class CatalogSector(disklib.Sector):
|
||||
TYPE = 'DOS 3.3 Catalog'
|
||||
|
||||
def __init__(self, disk, track, sector, data):
|
||||
super(CatalogSector, self).__init__(disk, track, sector, data)
|
||||
|
||||
(next_track, next_sector, file_entries) = data.unpack(
|
||||
'pad:8, int:8, int:8, pad:64, bits:1960'
|
||||
)
|
||||
|
||||
catalog_entries = []
|
||||
offset = 0
|
||||
while offset < len(file_entries):
|
||||
file_entry = file_entries[offset:offset+(35*8)]
|
||||
(file_track, file_sector, file_type, file_name, file_length) = file_entry.unpack(
|
||||
'uint:8, uint:8, uint:8, bytes:30, uintle:16'
|
||||
)
|
||||
if file_track and file_sector:
|
||||
entry = CatalogEntry(file_track, file_sector, file_type, file_name, file_length)
|
||||
catalog_entries.append(entry)
|
||||
offset += (35*8)
|
||||
|
||||
self.next_track = next_track
|
||||
self.next_sector = next_sector
|
||||
self.catalog_entries = catalog_entries
|
||||
|
||||
class FileMetadataSector(disklib.Sector):
|
||||
|
||||
def __init__(self, disk, track, sector, data, filename):
|
||||
super(FileMetadataSector, self).__init__(disk, track, sector, data)
|
||||
|
||||
self.filename = filename
|
||||
self.TYPE = 'DOS 3.3 File Metadata (%s)' % filename
|
||||
|
||||
(next_track, next_sector, sector_offset, data_sectors) = data.unpack(
|
||||
'pad:8, uint:8, uint:8, pad:16, uintle:16, pad:40, bits:1952'
|
||||
)
|
||||
|
||||
offset = 0
|
||||
data_track_sectors = []
|
||||
while offset < len(data_sectors):
|
||||
ds = data_sectors[offset:offset + 16]
|
||||
(t, s) = ds.unpack(
|
||||
'uint:8, uint:8'
|
||||
)
|
||||
if t and s:
|
||||
data_track_sectors.append((t, s))
|
||||
offset += 16
|
||||
|
||||
self.next_track = next_track
|
||||
self.next_sector = next_sector
|
||||
self.sector_offset = sector_offset
|
||||
self.data_track_sectors = data_track_sectors
|
||||
|
||||
|
||||
class FileDataSector(disklib.Sector):
|
||||
|
||||
def __init__(self, disk, track, sector, data, filename):
|
||||
super(FileDataSector, self).__init__(disk, track, sector, data)
|
||||
|
||||
self.filename = filename
|
||||
self.TYPE = 'DOS 3.3 File Contents (%s)' % filename
|
||||
|
||||
|
||||
class FreeSector(disklib.Sector):
|
||||
TYPE = "DOS 3.3 Free Sector"
|
||||
|
||||
def __init__(self, disk, track, sector, data):
|
||||
super(FreeSector, self).__init__(disk, track, sector, data)
|
||||
|
||||
|
||||
class Dos33Disk(disklib.Disk):
|
||||
|
||||
def __init__(self, *args, **kwargs):
|
||||
super(Dos33Disk, self).__init__(*args, **kwargs)
|
||||
# TODO: read DOS tracks and compare to known images
|
||||
|
||||
self.vtoc = self._ReadVTOC()
|
||||
|
||||
self.catalog_track = self.vtoc.catalog_track
|
||||
self.catalog_sector = self.vtoc.catalog_sector
|
||||
|
||||
# TODO: why does DOS 3.3 sometimes display e.g. volume 254 when the VTOC says 178
|
||||
self.volume = self.vtoc.volume
|
||||
|
||||
self.ReadCatalog()
|
||||
for catalog_entry in self.catalog.itervalues():
|
||||
self.ReadCatalogEntry(catalog_entry)
|
||||
|
||||
def _ReadVTOC(self):
|
||||
return VTOCSector.fromSector(self.ReadSector(0x11, 0x0))
|
||||
|
||||
def ReadCatalog(self):
|
||||
next_track = self.catalog_track
|
||||
next_sector = self.catalog_sector
|
||||
|
||||
catalog = {}
|
||||
catalog_entries = []
|
||||
while next_track and next_sector:
|
||||
cs = CatalogSector.fromSector(self.ReadSector(next_track, next_sector))
|
||||
(next_track, next_sector, new_entries) = (cs.next_track, cs.next_sector, cs.catalog_entries)
|
||||
catalog_entries.extend(new_entries)
|
||||
|
||||
filenames = []
|
||||
for entry in catalog_entries:
|
||||
filename = entry.FileName().rstrip()
|
||||
catalog[entry.FileName().rstrip()] = entry
|
||||
filenames.append(filename)
|
||||
|
||||
self.filenames = filenames
|
||||
self.catalog = catalog
|
||||
|
||||
def ReadCatalogEntry(self, entry):
|
||||
next_track = entry.track
|
||||
next_sector = entry.sector
|
||||
|
||||
sector_list = [None] * entry.length
|
||||
# entry.length counts the number of data sectors as well as track/sector list sectors
|
||||
track_sector_count = 0
|
||||
while next_track and next_sector:
|
||||
track_sector_count += 1
|
||||
if next_track == 0xff:
|
||||
# Deleted file
|
||||
# TODO: add sector type for this. What to do about sectors claimed by this file that are in use by another file? May discover this before or after this entry
|
||||
print "Found deleted file %s" % entry.FileName()
|
||||
break
|
||||
fs = FileMetadataSector.fromSector(self.ReadSector(next_track, next_sector), entry.FileName())
|
||||
(next_track, next_sector) = (fs.next_track, fs.next_sector)
|
||||
|
||||
num_sectors = len(fs.data_track_sectors)
|
||||
sector_list[fs.sector_offset:fs.sector_offset+num_sectors] = fs.data_track_sectors
|
||||
|
||||
# TODO: Assert we didn't have any holes. Or is this fine e.g. for a sparse text file?
|
||||
|
||||
#print track_sector_count
|
||||
# We allocated space up-front for an unknown number of t/s list sectors, trim them from the end
|
||||
sector_list = sector_list[:entry.length - track_sector_count]
|
||||
|
||||
#print sector_list
|
||||
contents = bitstring.BitString()
|
||||
for ts in sector_list:
|
||||
if not ts:
|
||||
#print "XXX found a sparse sector?"
|
||||
continue
|
||||
(t, s) = ts
|
||||
fds = FileDataSector.fromSector(self.ReadSector(t, s), entry.FileName())
|
||||
contents.append(fds.data)
|
||||
|
||||
return contents
|
||||
|
||||
def __str__(self):
|
||||
catalog = ['DISK VOLUME %d\n' % self.volume]
|
||||
for filename in self.catalog:
|
||||
entry = self.files[filename]
|
||||
try:
|
||||
file_type = FILE_TYPES[entry.file_type][0]
|
||||
except KeyError:
|
||||
print "%s has unknown file type %02x" % (entry.FileName(), entry.file_type)
|
||||
file_type = '?'
|
||||
catalog.append(
|
||||
'%s%s %03d %s' % (
|
||||
'*' if entry.locked else ' ',
|
||||
file_type, entry.length,
|
||||
entry.FileName()
|
||||
)
|
||||
)
|
||||
return '\n'.join(catalog)
|
||||
|
||||
|
||||
class CatalogEntry(object):
|
||||
def __init__(self, track, sector, file_type, file_name, length):
|
||||
self.track = track
|
||||
self.sector = sector
|
||||
self.file_type = file_type & 0x7f
|
||||
self.locked = file_type & 0x80
|
||||
self.file_name = file_name
|
||||
self.length = length
|
||||
# TODO: handle deleted files (track = 0xff, original track in file_name[0x20])
|
||||
|
||||
def FileName(self):
|
||||
return '%s' % ''.join([chr(ord(b) & 0x7f) for b in self.file_name])
|
||||
|
||||
def __str__(self):
|
||||
return "Track $%02x Sector $%02x Type %s Name: %s Length: %d" % (self.track, self.sector, FILE_TYPES[self.file_type], self.FileName(), self.length)
|
||||
49
src/apple2disk/process.py
Normal file
49
src/apple2disk/process.py
Normal file
@ -0,0 +1,49 @@
|
||||
import disk
|
||||
import dos33disk
|
||||
import os
|
||||
import sys
|
||||
|
||||
def main():
|
||||
disks = {}
|
||||
for root, dirs, files in os.walk(sys.argv[1]):
|
||||
for f in files:
|
||||
if not f.lower().endswith('.dsk') and not f.lower().endswith('.do'):
|
||||
continue
|
||||
|
||||
print f
|
||||
|
||||
b = bytearray(open(os.path.join(root, f), 'r').read())
|
||||
try:
|
||||
img = disk.Disk(f, b)
|
||||
except IOError:
|
||||
continue
|
||||
except AssertionError:
|
||||
continue
|
||||
|
||||
# See if this is a DOS 3.3 disk
|
||||
try:
|
||||
img = dos33disk.Dos33Disk.Taste(img)
|
||||
print "%s is a DOS 3.3 disk, volume %d" % (f, img.volume)
|
||||
except IOError:
|
||||
pass
|
||||
except AssertionError:
|
||||
pass
|
||||
|
||||
disks[f] = img
|
||||
|
||||
for ts, data in sorted(img.sectors.iteritems()):
|
||||
print data
|
||||
|
||||
# Group disks by hash of RWTS sector
|
||||
rwts_hashes = {}
|
||||
for f, d in disks.iteritems():
|
||||
rwts_hash = d.rwts.hash
|
||||
rwts_hashes.setdefault(rwts_hash, []).append(f)
|
||||
|
||||
for h, disks in rwts_hashes.iteritems():
|
||||
print h
|
||||
for d in sorted(disks):
|
||||
print " %s" % d
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
Loading…
Reference in New Issue
Block a user