self.window_update(signature, ord(buf[i]))
block_len = i - breaks[-1] + 1
if ((signature[0] % self.TARGET_CHUNK_SIZE == self.BREAKMARK_VALUE
self.window_update(signature, ord(buf[i]))
block_len = i - breaks[-1] + 1
if ((signature[0] % self.TARGET_CHUNK_SIZE == self.BREAKMARK_VALUE