FunPack3D .wfa unpacker

funpackextractor.py

import struct
import os
import sys

PACKAGE_HEADER = "<I"
FILE_HEADER = "<32sII"

print("FunPack 3D .WFA unpacker by krzys_h")
if len(sys.argv) != 2:
	print("Usage: {} path_to_file.wfa".format(sys.argv[0]))
	sys.exit(1)

file_path = sys.argv[1]

print("* Opening '{}'...".format(file_path))
f = open(file_path, "rb")

print("* Parsing file list...")
file_count, = struct.unpack(PACKAGE_HEADER, f.read(struct.calcsize(PACKAGE_HEADER)))
print(" - The archive contains {} files".format(file_count))

files = []
for fileid in range(file_count):
	filename, filestart, filesize = struct.unpack(FILE_HEADER, f.read(struct.calcsize(FILE_HEADER)))
	filename = filename.split(b'\x00')[0].decode()
	print(" - File '{}', size {}, starts at {}".format(filename, filesize, filestart))
	files.append((filename, filestart, filesize))

datastart = f.tell()
print(" - Actual data starts at {}".format(datastart))

target_dir = os.path.splitext(file_path)[0]
print("* Unpacking files into '{}'".format(target_dir))
print(" - Create output directory")
os.mkdir(target_dir)

for filename, filestart, filesize in files:
	print(" - {}".format(filename))
	f.seek(datastart + filestart)
	outf = open(os.path.join(target_dir, filename), "wb")
	outf.write(f.read(filesize))
	outf.close()

print("* Done")
f.close()