def get_size (mem, size): table = mem[0:size] if size == 1: return table[0] elif size == 2: return ((table[0] << 8) | table[1]) elif size == 3: return ((table[0] << 16) | (table[1] << 8) | table[2]) elif size == 4: return ((table[0] << 24) | (table[1] << 16) | (table[2] << 8) | table[3])