Mercurial > hg
comparison mercurial/util.py @ 8281:3e1e499db9d7
util: initialize md5 and sha1 without using extra global variables
This lets the functions skip the "if _sha1 is None" test on each call.
| author | Martin Geisler <mg@lazybytes.net> |
|---|---|
| date | Sun, 03 May 2009 00:03:35 +0200 |
| parents | 0b02d98d44d0 |
| children | 1ea7e7d90007 |
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| 8280:0b02d98d44d0 | 8281:3e1e499db9d7 |
|---|---|
| 18 import os, stat, threading, time, calendar, glob, osutil, random | 18 import os, stat, threading, time, calendar, glob, osutil, random |
| 19 import imp | 19 import imp |
| 20 | 20 |
| 21 # Python compatibility | 21 # Python compatibility |
| 22 | 22 |
| 23 _md5 = None | |
| 24 def md5(s): | 23 def md5(s): |
| 25 global _md5 | 24 try: |
| 26 if _md5 is None: | 25 import hashlib |
| 27 try: | 26 _md5 = hashlib.md5 |
| 28 import hashlib | 27 except ImportError: |
| 29 _md5 = hashlib.md5 | 28 import md5 |
| 30 except ImportError: | 29 _md5 = md5.md5 |
| 31 import md5 | 30 global md5 |
| 32 _md5 = md5.md5 | 31 md5 = _md5 |
| 33 return _md5(s) | 32 return _md5(s) |
| 34 | 33 |
| 35 _sha1 = None | |
| 36 def sha1(s): | 34 def sha1(s): |
| 37 global _sha1 | 35 try: |
| 38 if _sha1 is None: | 36 import hashlib |
| 39 try: | 37 _sha1 = hashlib.sha1 |
| 40 import hashlib | 38 except ImportError: |
| 41 _sha1 = hashlib.sha1 | 39 import sha |
| 42 except ImportError: | 40 _sha1 = sha.sha |
| 43 import sha | 41 global sha1 |
| 44 _sha1 = sha.sha | 42 sha1 = _sha1 |
| 45 return _sha1(s) | 43 return _sha1(s) |
| 46 | 44 |
| 47 import subprocess | 45 import subprocess |
| 48 closefds = os.name == 'posix' | 46 closefds = os.name == 'posix' |
| 49 def popen2(cmd, mode='t', bufsize=-1): | 47 def popen2(cmd, mode='t', bufsize=-1): |