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Side by Side Diff: scons-2.0.1/engine/SCons/compat/_scons_hashlib.py

Issue 6711079: Added an unmodified copy of SCons to third_party. (Closed) Base URL: svn://svn.chromium.org/native_client/trunk/src/third_party/
Patch Set: '' Created 9 years, 9 months ago
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1 #
2 # Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 The S Cons Foundation
3 #
4 # Permission is hereby granted, free of charge, to any person obtaining
5 # a copy of this software and associated documentation files (the
6 # "Software"), to deal in the Software without restriction, including
7 # without limitation the rights to use, copy, modify, merge, publish,
8 # distribute, sublicense, and/or sell copies of the Software, and to
9 # permit persons to whom the Software is furnished to do so, subject to
10 # the following conditions:
11 #
12 # The above copyright notice and this permission notice shall be included
13 # in all copies or substantial portions of the Software.
14 #
15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
16 # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
17 # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
19 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
20 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 #
23
24 __doc__ = """
25 hashlib backwards-compatibility module for older (pre-2.5) Python versions
26
27 This does not not NOT (repeat, *NOT*) provide complete hashlib
28 functionality. It only wraps the portions of MD5 functionality used
29 by SCons, in an interface that looks like hashlib (or enough for our
30 purposes, anyway). In fact, this module will raise an ImportError if
31 the underlying md5 module isn't available.
32 """
33
34 __revision__ = "src/engine/SCons/compat/_scons_hashlib.py 5134 2010/08/16 23:02: 40 bdeegan"
35
36 import md5
37 from string import hexdigits
38
39 class md5obj(object):
40
41 md5_module = md5
42
43 def __init__(self, name, string=''):
44 if not name in ('MD5', 'md5'):
45 raise ValueError("unsupported hash type")
46 self.name = 'md5'
47 self.m = self.md5_module.md5()
48
49 def __repr__(self):
50 return '<%s HASH object @ %#x>' % (self.name, id(self))
51
52 def copy(self):
53 import copy
54 result = copy.copy(self)
55 result.m = self.m.copy()
56 return result
57
58 def digest(self):
59 return self.m.digest()
60
61 def update(self, arg):
62 return self.m.update(arg)
63
64 def hexdigest(self):
65 return self.m.hexdigest()
66
67 new = md5obj
68
69 def md5(string=''):
70 return md5obj('md5', string)
71
72 # Local Variables:
73 # tab-width:4
74 # indent-tabs-mode:nil
75 # End:
76 # vim: set expandtab tabstop=4 shiftwidth=4:
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