1 files changed, 91 insertions, 0 deletions
diff --git a/src/engine/SCons/compat/_scons_hashlib.py b/src/engine/SCons/compat/_scons_hashlib.py
new file mode 100644
index 0000000..bb4c69c
--- /dev/null
+++ b/src/engine/SCons/compat/_scons_hashlib.py
@@ -0,0 +1,91 @@
+#
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 The SCons Foundation
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+__doc__ = """
+hashlib backwards-compatibility module for older (pre-2.5) Python versions
+
+This does not not NOT (repeat, *NOT*) provide complete hashlib
+functionality.  It only wraps the portions of MD5 functionality used
+by SCons, in an interface that looks like hashlib (or enough for our
+purposes, anyway).  In fact, this module will raise an ImportError if
+the underlying md5 module isn't available.
+"""
+
+__revision__ = "src/engine/SCons/compat/_scons_hashlib.py 4577 2009/12/27 19:44:43 scons"
+
+import md5
+import string
+
+class md5obj:
+
+    md5_module = md5
+
+    def __init__(self, name, string=''):
+        if not name in ('MD5', 'md5'):
+            raise ValueError, "unsupported hash type"
+        self.name = 'md5'
+        self.m = self.md5_module.md5()
+
+    def __repr__(self):
+        return '<%s HASH object @ %#x>' % (self.name, id(self))
+
+    def copy(self):
+        import copy
+        result = copy.copy(self)
+        result.m = self.m.copy()
+        return result
+
+    def digest(self):
+        return self.m.digest()
+
+    def update(self, arg):
+        return self.m.update(arg)
+
+    if hasattr(md5.md5(), 'hexdigest'):
+
+        def hexdigest(self):
+            return self.m.hexdigest()
+
+    else:
+
+        # Objects created by the underlying md5 module have no native
+        # hexdigest() method (*cough* 1.5.2 *cough*), so provide an
+        # equivalent lifted from elsewhere.
+        def hexdigest(self):
+            h = string.hexdigits
+            r = ''
+            for c in self.digest():
+                i = ord(c)
+                r = r + h[(i >> 4) & 0xF] + h[i & 0xF]
+            return r
+
+new = md5obj
+
+def md5(string=''):
+    return md5obj('md5', string)
+
+# Local Variables:
+# tab-width:4
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=4 shiftwidth=4: