1165   FORMAT_STRING = ('!QQ')  # tag, num_bytes_following (descriptor header)  variable in AvbDescriptor
1176     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1180           struct.unpack(self.FORMAT_STRING, data[0:self.SIZE]))
1209     desc = struct.pack(self.FORMAT_STRING, self.tag, nbf_with_padding)
1250   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbPropertyDescriptor
1264     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1268        value_size) = struct.unpack(self.FORMAT_STRING, data[0:self.SIZE])
1314     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1365   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbHashtreeDescriptor
1395     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1402        root_digest_len, self.flags, _) = struct.unpack(self.FORMAT_STRING,
1483     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1572   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbHashDescriptor
1591     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1596        digest_len, self.flags, _) = struct.unpack(self.FORMAT_STRING,
1654     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1712   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbKernelCmdlineDescriptor
1729     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1733           struct.unpack(self.FORMAT_STRING, data[0:self.SIZE]))
1770     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1809   FORMAT_STRING = ('!QQ'  # tag, num_bytes_following (descriptor header)  variable in AvbChainPartitionDescriptor
1825     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1830        public_key_len, _) = struct.unpack(self.FORMAT_STRING, data[0:self.SIZE])
1877     desc = struct.pack(self.FORMAT_STRING, self.TAG, nbf_with_padding,
1978   FORMAT_STRING = ('!4s2L'  # magic, 2 x version.  variable in AvbFooter
1994     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
1999        self.vbmeta_size) = struct.unpack(self.FORMAT_STRING, data)
2016     return struct.pack(self.FORMAT_STRING, self.magic, self.version_major,
2072   FORMAT_STRING = ('!4s2L'   # magic, 2 x version  variable in AvbVBMetaHeader
2095     assert struct.calcsize(self.FORMAT_STRING) == self.SIZE
2109        release_string) = struct.unpack(self.FORMAT_STRING, data)
2158     return struct.pack(self.FORMAT_STRING, self.magic,