List the items contained in a Marmoset Viewer's .mview archive file

list_marmoset_archive.py

import struct

def readCString(f):
	"""This is the most naive implementation possible, don't use in prod"""
	str = ""
	c = f.read(1)
	while c != '\0':
		str += c
		c = f.read(1)
	return str

def getFileSize(f):
	pos = f.tell()
	f.seek(0, 2)
	end = f.tell()
	f.seek(pos, 0)
	return end

with open("vivfox.mview", 'rb') as f:
	end = getFileSize(f)
	fmt = "{:<18} {:<18} {:>10} {:>10} {:>10}"  # Output table format
	print(fmt.format("Name", "MIME type", "Compressed", "Size", "Raw size"))
	while True:
		name = readCString(f)
		mime = readCString(f)
		compressed, size, rawSize = struct.unpack("III", f.read(3*4))
		print(fmt.format(name, mime, str(bool(compressed & 1)), hex(size), hex(rawSize)))
		if f.tell() + size >= end:
			break
		f.seek(size, 1)  # move forward by "size" bytes in the file