Created
September 21, 2021 17:43
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geekbench plar
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import bz2 | |
import io | |
import os | |
from hashlib import sha1 | |
from utils import read_uint32 | |
plar = open("geekbench.plar", "rb") | |
dest = "./plar" | |
assert plar.read(4) == b"PRLA" | |
file_table_offset = read_uint32(plar.read(4)) | |
file_table_size = read_uint32(plar.read(4)) | |
plar.seek(file_table_offset, io.SEEK_SET) | |
while plar.tell() != file_table_offset + file_table_size: | |
filename_length = read_uint32(plar.read(4)) | |
file_start_offset = read_uint32(plar.read(4)) | |
uncompressed_file_size = read_uint32(plar.read(4)) | |
compressed_file_size = read_uint32(plar.read(4)) | |
file_sha1 = plar.read(20) | |
filename = plar.read(filename_length).decode() | |
next_ptr = plar.tell() | |
plar.seek(file_start_offset, io.SEEK_SET) | |
compressed_data = plar.read(compressed_file_size) | |
assert file_sha1 == sha1(compressed_data).digest() | |
if uncompressed_file_size != compressed_file_size: | |
uncompressed_data = bz2.decompress(compressed_data) | |
assert len(uncompressed_data) == uncompressed_file_size | |
else: | |
uncompressed_data = compressed_data | |
target_filename = f"{dest}/{filename}" | |
mkdir_target = "/".join(target_filename.split("/")[:-1]) | |
os.makedirs(mkdir_target, exist_ok=True) | |
open(target_filename, "wb").write(uncompressed_data) | |
plar.seek(next_ptr, io.SEEK_SET) |
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