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comparison mercurial/util.py @ 3145:e4ea47c21480

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Add cachefunc to abstract function call cache
author Brendan Cully <brendan@kublai.com>
date Fri, 22 Sep 2006 08:19:25 -0700
parents cff3c58a5766
children 97420a49188d
comparison
equal deleted inserted replaced
3144:8342ad5abe0b 3145:e4ea47c21480
21 defaultdateformats = ('%Y-%m-%d %H:%M:%S', '%Y-%m-%d %H:%M', 21 defaultdateformats = ('%Y-%m-%d %H:%M:%S', '%Y-%m-%d %H:%M',
22 '%a %b %d %H:%M:%S %Y') 22 '%a %b %d %H:%M:%S %Y')
23 23
24 class SignalInterrupt(Exception): 24 class SignalInterrupt(Exception):
25 """Exception raised on SIGTERM and SIGHUP.""" 25 """Exception raised on SIGTERM and SIGHUP."""
26
27 def cachefunc(func):
28 '''cache the result of function calls'''
29 cache = {}
30 if func.func_code.co_argcount == 1:
31 def f(arg):
32 if arg not in cache:
33 cache[arg] = func(arg)
34 return cache[arg]
35 else:
36 def f(*args):
37 if args not in cache:
38 cache[args] = func(*args)
39 return cache[args]
40
41 return f
26 42
27 def pipefilter(s, cmd): 43 def pipefilter(s, cmd):
28 '''filter string S through command CMD, returning its output''' 44 '''filter string S through command CMD, returning its output'''
29 (pout, pin) = popen2.popen2(cmd, -1, 'b') 45 (pout, pin) = popen2.popen2(cmd, -1, 'b')
30 def writer(): 46 def writer():