Compress the data to a file.
(self)
| 349 | self.write(''.join(seq)) |
| 350 | |
| 351 | def flush(self): |
| 352 | """Compress the data to a file.""" |
| 353 | i = 0 |
| 354 | base = 0 |
| 355 | out = array('b') |
| 356 | while base < len(self.bytes): |
| 357 | |
| 358 | # measure the run starting at t |
| 359 | i = 1 |
| 360 | imax = min(128, len(self.bytes) - base) |
| 361 | basebyte = self.bytes[base] |
| 362 | while (i < imax |
| 363 | and basebyte == self.bytes[base + i]): |
| 364 | i += 1 |
| 365 | # if the run is either length 3 or to the end of the file, |
| 366 | # write it |
| 367 | if i > 2 or base + i == len(self.bytes): |
| 368 | out.append(1 - i) |
| 369 | out.append(self.bytes[base]) |
| 370 | base += i |
| 371 | continue |
| 372 | |
| 373 | # measure the nonrun starting at t |
| 374 | i = 1 |
| 375 | imax = min(128, len(self.bytes) - base) |
| 376 | while (i < imax |
| 377 | and (base + i + 2 >= len(self.bytes) |
| 378 | or self.bytes[base + i] != self.bytes[base + i + 1] |
| 379 | or self.bytes[base + i] != self.bytes[base + i + 2])): |
| 380 | i += 1 |
| 381 | out.append(i - 1) |
| 382 | out.extend(self.bytes[base:base + i]) |
| 383 | base += i |
| 384 | return out |
| 385 | |
| 386 | @staticmethod |
| 387 | def test(): |