get_le32
!= get_le32(s->temp.buf + HEADER_MAGIC_SIZE + 2))
if (xz_crc32(s->temp.buf + 4, 6, 0) != get_le32(s->temp.buf))
if ((s->index.size >> 2) != get_le32(s->temp.buf + 4))
!= get_le32(s->temp.buf + s->temp.size))