Apple-2-Tools/atrcopy
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Added methods to allow overriding of segment type in subclasses

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* updated to version 1.3.0
This commit is contained in:
Rob McMullen 2015-12-22 19:57:17 -08:00
parent be8e0ada1a
commit 9907050f5c
1 changed files with 32 additions and 11 deletions
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43
atrcopy.py
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@ -1,7 +1,7 @@
#!/usr/bin/env python
__version__ = "1.1.1"
__version__ = "1.3.0"
import struct
@ -245,6 +245,13 @@ class AtariDosFile(object):
def __str__(self):
return "\n".join(str(s) for s in self.segments) + "\n"
def get_obj_segment(self, metadata_start, data_start, start_addr, end_addr, data, name=""):
"""Subclass use: override this method to create a custom segment.
By default uses an ObjSegment
"""
return ObjSegment(metadata_start, data_start, start_addr, end_addr, data, name)
def parse_segments(self):
bytes = self.data
pos = 0
@ -259,15 +266,15 @@ class AtariDosFile(object):
raise InvalidBinaryFile
first = False
if len(bytes[pos:pos + 4]) < 4:
self.segments.append(ObjSegment(0, 0, bytes[pos:pos + 4], "Short Segment Header"))
self.segments.append(self.get_obj_segment(0, 0, bytes[pos:pos + 4], "Short Segment Header"))
break
start, end = struct.unpack("<HH", bytes[pos:pos + 4])
count = end - start + 1
found = len(bytes[pos + 4:pos + 4 + count])
if found < count:
self.segments.append(ObjSegment(pos, pos + 4, start, end, bytes[pos + 4:pos + 4 + count], "Incomplete Data"))
self.segments.append(self.get_obj_segment(pos, pos + 4, start, end, bytes[pos + 4:pos + 4 + count], "Incomplete Data"))
break
self.segments.append(ObjSegment(pos, pos + 4, start, end, bytes[pos + 4:pos + 4 + count]))
self.segments.append(self.get_obj_segment(pos, pos + 4, start, end, bytes[pos + 4:pos + 4 + count]))
pos += 4 + count
class AtrFileSegment(ObjSegment):
@ -407,6 +414,20 @@ class AtrDiskImage(object):
count += size
return start, count
def get_obj_segment(self, metadata_start, data_start, start_addr, end_addr, data, name):
"""Subclass use: override this method to create a custom segment.
By default uses an ObjSegment
"""
return ObjSegment(metadata_start, data_start, start_addr, end_addr, data, name)
def get_raw_sectors_segment(self, first_sector, num_sectors, count, data, **kwargs):
"""Subclass use: override this method to create a custom segment.
By default uses an RawSectorsSegment
"""
return RawSectorsSegment(first_sector, num_sectors, count, data, **kwargs)
def get_boot_segments(self):
bytes = self.get_sectors(1)[0:20]
values = struct.unpack("<BBHHBHBBBHBHBH", bytes)
@ -416,9 +437,9 @@ class AtrDiskImage(object):
num = values[1]
addr = values[2]
bytes = self.get_sectors(1, num)
header = ObjSegment(0, 0, addr, addr + 20, bytes[0:20], name="Boot Header")
sectors = ObjSegment(0, 0, addr, addr + len(bytes), bytes, name="Boot Sectors")
code = ObjSegment(0, 0, addr + 20, addr + len(bytes), bytes[20:], name="Boot Code")
header = self.get_obj_segment(0, 0, addr, addr + 20, bytes[0:20], name="Boot Header")
sectors = self.get_obj_segment(0, 0, addr, addr + len(bytes), bytes, name="Boot Sectors")
code = self.get_obj_segment(0, 0, addr + 20, addr + len(bytes), bytes[20:], name="Boot Code")
segments = [sectors, header, code]
return segments
@ -426,7 +447,7 @@ class AtrDiskImage(object):
segments = []
addr = 0
start, count = self.get_contiguous_sectors(self.first_vtoc, self.num_vtoc)
segment = RawSectorsSegment(self.first_vtoc, self.num_vtoc, count, self.bytes[start:start+count], name="VTOC")
segment = self.get_raw_sectors_segment(self.first_vtoc, self.num_vtoc, count, self.bytes[start:start+count], name="VTOC")
segments.append(segment)
return segments
@ -434,14 +455,14 @@ class AtrDiskImage(object):
segments = []
addr = 0
start, count = self.get_contiguous_sectors(361, 8)
segment = RawSectorsSegment(361, 8, count, self.bytes[start:start+count], name="Directory")
segment = self.get_raw_sectors_segment(361, 8, count, self.bytes[start:start+count], name="Directory")
segments.append(segment)
return segments
def parse_segments(self):
if self.header.size_in_bytes > 0:
self.segments.append(ObjSegment(0, 0, 0, self.header.atr_header_offset, self.bytes[0:self.header.atr_header_offset], name="%s Header" % self.header.file_format))
self.segments.append(RawSectorsSegment(1, self.header.max_sectors, self.header.size_in_bytes, self.bytes[self.header.atr_header_offset:], name="Raw disk sectors"))
self.segments.append(self.get_obj_segment(0, 0, 0, self.header.atr_header_offset, self.bytes[0:self.header.atr_header_offset], name="%s Header" % self.header.file_format))
self.segments.append(self.get_raw_sectors_segment(1, self.header.max_sectors, self.header.size_in_bytes, self.bytes[self.header.atr_header_offset:], name="Raw disk sectors"))
self.segments.extend(self.get_boot_segments())
self.segments.extend(self.get_vtoc_segments())
self.segments.extend(self.get_directory_segments())