/usr/lib/python2.7/dist-packages/csa/valueset.py is in python-csa 0.1.0-1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# This file is part of the Connection-Set Algebra (CSA).
# Copyright (C) 2010,2011,2012 Mikael Djurfeldt
#
# CSA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# CSA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
from csaobject import *
class ValueSet (CSAObject):
def __init__ (self):
CSAObject.__init__ (self, "valueset")
def __neg__ (self):
return GenericValueSet (lambda i, j: - self (i, j))
def __add__ (self, other):
if not callable (other):
return maybeAffine (other, 1.0, self)
elif isinstance (other, (QuotedValueSet, AffineValueSet)):
return other.__add__ (self)
elif isinstance (other, GenericValueSet):
return GenericValueSet (lambda i, j: self (i, j) + other.function (i, j))
else:
return GenericValueSet (lambda i, j: self (i, j) + other (i, j))
def __radd__ (self, other):
return self.__add__ (other)
def __sub__ (self, other):
return self.__add__ (- other)
def __rsub__ (self, other):
return self.__neg__ ().__add__ (other)
def __mul__ (self, other):
if not callable (other):
return maybeAffine (0.0, other, self)
elif isinstance (other, (QuotedValueSet, AffineValueSet)):
return other.__mul__ (self)
elif isinstance (other, GenericValueSet):
return GenericValueSet (lambda i, j: self (i, j) * other.function (i, j))
else:
return GenericValueSet (lambda i, j: self (i, j) * other (i, j))
def __rmul__ (self, other):
return self.__mul__ (other)
class QuotedValueSet (ValueSet):
def __init__ (self, expression):
ValueSet.__init__ (self)
self.expression = expression
def __call__ (self, i, j):
return self.expression
def __neg__ (self):
return QuotedValueSet (- self.expression)
def __add__ (self, other):
if not callable (other):
return QuotedValueSet (self.expression + other)
elif isinstance (other, QuotedValueSet):
return QuotedValueSet (self.expression + other.expression)
elif isinstance (other, AffineValueSet):
return other.__add__ (self)
else:
return maybeAffine (self.expression, 1.0, other)
def __mul__ (self, other):
if not callable (other):
return QuotedValueSet (self.expression * other)
elif isinstance (other, QuotedValueSet):
return QuotedValueSet (self.expression * other.expression)
elif isinstance (other, AffineValueSet):
return other.__mul__ (self)
else:
return maybeAffine (0.0, self.expression, other)
class GenericValueSet (ValueSet):
def __init__ (self, function):
ValueSet.__init__ (self)
self.function = function
def __call__ (self, i, j):
return self.function (i, j)
def __neg__ (self):
return GenericValueSet (lambda i, j: - self.function (i, j))
def __add__ (self, other):
if not callable (other):
return maybeAffine (other, 1.0, self.function)
elif isinstance (other, (QuotedValueSet, AffineValueSet)):
return other.__add__ (self)
elif isinstance (other, GenericValueSet):
return GenericValueSet (lambda i, j: self.function (i, j) + other.function (i, j))
else:
return GenericValueSet (lambda i, j: self.function (i, j) + other (i, j))
def __mul__ (self, other):
if not callable (other):
return maybeAffine (0.0, other, self.function)
elif isinstance (other, (QuotedValueSet, AffineValueSet)):
return other.__mul__ (self)
elif isinstance (other, GenericValueSet):
return GenericValueSet (lambda i, j: self.function (i, j) * other.function (i, j))
else:
return GenericValueSet (lambda i, j: self.function (i, j) * other (i, j))
class AffineValueSet (ValueSet):
def __init__ (self, constant, coefficient, function):
ValueSet.__init__ (self)
self.const = constant
self.coeff = coefficient
self.func = function
def __call__ (self, i, j):
return self.const + self.coeff * self.func (i, j)
def __neg__ (self):
return maybeAffine (- self.const, - self.coeff, self.func)
def __add__ (self, other):
if not callable (other):
return maybeAffine (self.const + other, self.coeff, self.func)
elif isinstance (other, QuotedValueSet):
return maybeAffine (self.const + other.expression,
self.coeff, self.func)
elif isinstance (other, AffineValueSet):
f = lambda i, j: \
self.const * self.func (i, j) \
+ other.const * other.func (i, j)
return maybeAffine (self.const + other.const,
1.0,
f)
def __mul__ (self, other):
if not callable (other):
return maybeAffine (self.const * other,
self.coeff * other,
self.func)
elif isinstance (other, QuotedValueSet):
return maybeAffine (self.const * other.expression,
self.coeff * other.expression,
self.func)
elif isinstance (other, AffineValueSet):
f = lambda i, j: \
other.const * self.coeff * self.func (i, j) \
+ self.const * other.coeff * other.func (i, j) \
+ self.coeff * other.coeff \
* self.func (i, j) * other.func (i, j)
return maybeAffine (self.const * other.const,
1.0,
f)
def maybeAffine (const, coeff, func):
if coeff == 0.0:
return QuotedValueSet (const)
elif const == 0.0 and coeff == 1.0:
return GenericValueSet (func)
else:
return AffineValueSet (const, coeff, func)
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