Nikita_luk Fat12 9216			Aleksey Fat12 9105
f	1	import sys	f	1	import sys
	2	import struct		2	import struct
	3			3
n	4	def parse_fat12_disk(img):	n	4	def read_fat12_disk_image(image_data):
	5	SECTOR = 512		5	sector_size = 512
	6	ROOT_OFFSET = 19 * SECTOR		6	root_dir_start = 19 * sector_size
	7	entries_list = []		7	root_dir_entries = []
	8	for idx in range(224):		8	for i in range(224):
	9	start_pos = ROOT_OFFSET + idx * 32		9	entry_start = root_dir_start + i * 32
	10	entry_bytes = img[start_pos:start_pos + 32]		10	entry_data = image_data[entry_start:entry_start + 32]
	11	if len(entry_bytes) < 32:		11	if len(entry_data) < 32:
	12	break		12	break
n	13	first_char = entry_bytes[0]	n	13	first_byte = entry_data[0]
	14	if first_char == 0:		14	if first_byte == 0:
	15	break		15	break
n	16	if first_char == 229:	n	16	if first_byte == 229:
	17	continue		17	continue
n	18	name_part = entry_bytes[0:8]	n	18	name_bytes = entry_data[0:8]
	19	ext_part = entry_bytes[8:11]		19	ext_bytes = entry_data[8:11]
	20	attributes = entry_bytes[11]		20	attr = entry_data[11]
	21	if attributes & 8:		21	if attr & 8:
	22	continue		22	continue
n	23	file_size_val = struct.unpack('<I', entry_bytes[28:32])[0]	n	23	size = struct.unpack('<I', entry_data[28:32])[0]
	24	name_str = name_part.decode('cp866', errors='ignore').rstrip()		24	name = name_bytes.decode('cp866', errors='replace').rstrip()
	25	ext_str = ext_part.decode('cp866', errors='ignore').rstrip()		25	ext = ext_bytes.decode('cp866', errors='replace').rstrip()
	26	if ext_str:		26	if ext:
	27	full_name = f'{name_str}.{ext_str}'		27	filename = f'{name}.{ext}'
	28	else:		28	else:
n	29	full_name = name_str	n	29	filename = name
	30	is_dir_flag = attributes & 16 != 0		30	is_directory = attr & 16 != 0
	31	entries_list.append((full_name, file_size_val, is_dir_flag))		31	root_dir_entries.append((filename, size, is_directory))
	32	return entries_list		32	return root_dir_entries
	33			33
n	34	def execute_main():	n	34	def main():
	35	input_data = sys.stdin.buffer.read()		35	image_data = sys.stdin.buffer.read()
	36	if len(input_data) != 1474560:		36	if len(image_data) != 1474560:
	37	return		37	return
n	38	disk_entries = parse_fat12_disk(input_data)	n	38	entries = read_fat12_disk_image(image_data)
	39	if not disk_entries:		39	if not entries:
	40	return		40	return
n	41	disk_entries.sort(key=lambda item: item[0].upper())	n	41	entries.sort(key=lambda x: x[0].upper())
	42	for entry_name, entry_size, is_dir in disk_entries:		42	for filename, size, is_directory in entries:
	43	if is_dir:		43	if is_directory:
	44	print(f'{entry_name:12} dir')		44	print(f'{filename:12} dir')
	45	else:		45	else:
n	46	print(f'{entry_name:12} {entry_size}')	n	46	print(f'{filename:12} {size}')
	47	if __name__ == '__main__':		47	if __name__ == '__main__':
t	48	execute_main()	t	48	main()

Legends
Colors  Added  Changed Deleted	Links (f)irst change (n)ext change (t)op