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# Copyright (c) 2005 The Regents of The University of Michigan
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Nathan Binkert
__all__ = [ 'orderdict' ]
from UserDict import DictMixin
class orderdict(dict, DictMixin):
def __init__(self, *args, **kwargs):
if len(args) > 1:
raise TypeError("expected at most one argument, got %d" % \
len(args))
self._keys = []
self.update(*args, **kwargs)
def __setitem__(self, key, item):
if key not in self:
self._keys.append(key)
super(orderdict, self).__setitem__(key, item)
def __delitem__(self, key):
super(orderdict, self).__delitem__(key)
self._keys.remove(key)
def clear(self):
super(orderdict, self).clear()
self._keys = []
def iterkeys(self):
for key in self._keys:
yield key
def itervalues(self):
for key in self._keys:
yield self[key]
def iteritems(self):
for key in self._keys:
yield key, self[key]
def keys(self):
return self._keys[:]
def values(self):
return [ self[key] for key in self._keys ]
def items(self):
return [ (self[key],key) for key in self._keys ]
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