Mercurial > hg > mercurial-crew-with-dirclash
comparison mercurial/util.py @ 5206:0f6a1bdf89fb
match: handle large regexes
Some Python versions don't handle large regexes, so when we hit an
overflow, split our regex in two.
| author | Matt Mackall <mpm@selenic.com> |
|---|---|
| date | Sun, 19 Aug 2007 14:03:56 -0500 |
| parents | 84b10dc3dccc |
| children | 1108c952cca1 b0bc8cf41ffc |
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| 5195:6d5ed61c508c | 5206:0f6a1bdf89fb |
|---|---|
| 474 if not pats: | 474 if not pats: |
| 475 return | 475 return |
| 476 try: | 476 try: |
| 477 pat = '(?:%s)' % '|'.join([regex(k, p, tail) for (k, p) in pats]) | 477 pat = '(?:%s)' % '|'.join([regex(k, p, tail) for (k, p) in pats]) |
| 478 return re.compile(pat).match | 478 return re.compile(pat).match |
| 479 except OverflowError: | |
| 480 # We're using a Python with a tiny regex engine and we | |
| 481 # made it explode, so we'll divide the pattern list in two | |
| 482 # until it works | |
| 483 l = len(pats) | |
| 484 if l < 2: | |
| 485 raise | |
| 486 a, b = matchfn(pats[:l/2], tail), matchfn(pats[l/2:], tail) | |
| 487 return lambda s: a(s) or b(s) | |
| 479 except re.error: | 488 except re.error: |
| 480 for k, p in pats: | 489 for k, p in pats: |
| 481 try: | 490 try: |
| 482 re.compile('(?:%s)' % regex(k, p, tail)) | 491 re.compile('(?:%s)' % regex(k, p, tail)) |
| 483 except re.error: | 492 except re.error: |