import functools
import re
-from . import islhelper
+from fractions import Fraction
-from .islhelper import mainctx, libisl, isl_set_basic_sets
+from . import islhelper
+from .islhelper import mainctx, libisl
+from .geometry import GeometricObject, Point
from .linexprs import Expression, Symbol
@functools.total_ordering
-class Domain:
+class Domain(GeometricObject):
__slots__ = (
'_polyhedra',
def __new__(cls, *polyhedra):
from .polyhedra import Polyhedron
if len(polyhedra) == 1:
- polyhedron = polyhedra[0]
- if isinstance(polyhedron, str):
- return cls.fromstring(polyhedron)
- elif isinstance(polyhedron, Polyhedron):
- return polyhedron
+ argument = polyhedra[0]
+ if isinstance(argument, str):
+ return cls.fromstring(argument)
+ elif isinstance(argument, GeometricObject):
+ return argument.aspolyhedron()
else:
raise TypeError('argument must be a string '
- 'or a Polyhedron instance')
+ 'or a GeometricObject instance')
else:
for polyhedron in polyhedra:
if not isinstance(polyhedron, Polyhedron):
return self._dimension
def disjoint(self):
+ """
+ Returns this set as disjoint.
+ """
islset = self._toislset(self.polyhedra, self.symbols)
islset = libisl.isl_set_make_disjoint(mainctx, islset)
return self._fromislset(islset, self.symbols)
def isempty(self):
+ """
+ Returns true if this set is an Empty set.
+ """
islset = self._toislset(self.polyhedra, self.symbols)
empty = bool(libisl.isl_set_is_empty(islset))
libisl.isl_set_free(islset)
return not self.isempty()
def isuniverse(self):
+ """
+ Returns true if this set is the Universe set.
+ """
islset = self._toislset(self.polyhedra, self.symbols)
universe = bool(libisl.isl_set_plain_is_universe(islset))
libisl.isl_set_free(islset)
return universe
def isbounded(self):
+ """
+ Returns true if this set is bounded.
+ """
islset = self._toislset(self.polyhedra, self.symbols)
bounded = bool(libisl.isl_set_is_bounded(islset))
libisl.isl_set_free(islset)
return bounded
def __eq__(self, other):
+ """
+ Returns true if two sets are equal.
+ """
symbols = self._xsymbols([self, other])
islset1 = self._toislset(self.polyhedra, symbols)
islset2 = other._toislset(other.polyhedra, symbols)
return equal
def isdisjoint(self, other):
+ """
+ Return True if two sets have a null intersection.
+ """
symbols = self._xsymbols([self, other])
islset1 = self._toislset(self.polyhedra, symbols)
islset2 = self._toislset(other.polyhedra, symbols)
return equal
def issubset(self, other):
+ """
+ Report whether another set contains this set.
+ """
symbols = self._xsymbols([self, other])
islset1 = self._toislset(self.polyhedra, symbols)
islset2 = self._toislset(other.polyhedra, symbols)
return equal
def __le__(self, other):
+ """
+ Returns true if this set is less than or equal to another set.
+ """
return self.issubset(other)
def __lt__(self, other):
+ """
+ Returns true if this set is less than another set.
+ """
symbols = self._xsymbols([self, other])
islset1 = self._toislset(self.polyhedra, symbols)
islset2 = self._toislset(other.polyhedra, symbols)
return equal
def complement(self):
+ """
+ Returns the complement of this set.
+ """
islset = self._toislset(self.polyhedra, self.symbols)
islset = libisl.isl_set_complement(islset)
return self._fromislset(islset, self.symbols)
def __invert__(self):
+ """
+ Returns the complement of this set.
+ """
return self.complement()
def simplify(self):
- #does not change anything in any of the examples
- #isl seems to do this naturally
+ """
+ Returns a set without redundant constraints.
+ """
islset = self._toislset(self.polyhedra, self.symbols)
islset = libisl.isl_set_remove_redundancies(islset)
return self._fromislset(islset, self.symbols)
- def polyhedral_hull(self):
- # several types of hull are available
- # polyhedral seems to be the more appropriate, to be checked
+ def aspolyhedron(self):
+ """
+ Returns polyhedral hull of set.
+ """
from .polyhedra import Polyhedron
islset = self._toislset(self.polyhedra, self.symbols)
islbset = libisl.isl_set_polyhedral_hull(islset)
return Polyhedron._fromislbasicset(islbset, self.symbols)
- def project_out(self, dims):
- # use to remove certain variables
+ def asdomain(self):
+ return self
+
+ def project(self, dims):
+ """
+ Return new set with given dimensions removed.
+ """
islset = self._toislset(self.polyhedra, self.symbols)
n = 0
for index, symbol in reversed(list(enumerate(self.symbols))):
return Domain._fromislset(islset, dims)
def sample(self):
- from .polyhedra import Polyhedron
+ """
+ Returns a single subset of the input.
+ """
islset = self._toislset(self.polyhedra, self.symbols)
- islbset = libisl.isl_set_sample(islset)
- return Polyhedron._fromislbasicset(islbset, self.symbols)
+ islpoint = libisl.isl_set_sample_point(islset)
+ if bool(libisl.isl_point_is_void(islpoint)):
+ libisl.isl_point_free(islpoint)
+ raise ValueError('domain must be non-empty')
+ point = {}
+ for index, symbol in enumerate(self.symbols):
+ coordinate = libisl.isl_point_get_coordinate_val(islpoint,
+ libisl.isl_dim_set, index)
+ coordinate = islhelper.isl_val_to_int(coordinate)
+ point[symbol] = coordinate
+ libisl.isl_point_free(islpoint)
+ return point
def intersection(self, *others):
+ """
+ Return the intersection of two sets as a new set.
+ """
if len(others) == 0:
return self
symbols = self._xsymbols((self,) + others)
return self._fromislset(islset1, symbols)
def __and__(self, other):
+ """
+ Return the intersection of two sets as a new set.
+ """
return self.intersection(other)
def union(self, *others):
+ """
+ Return the union of sets as a new set.
+ """
if len(others) == 0:
return self
symbols = self._xsymbols((self,) + others)
return self._fromislset(islset1, symbols)
def __or__(self, other):
+ """
+ Return a new set with elements from both sets.
+ """
return self.union(other)
def __add__(self, other):
+ """
+ Return new set containing all elements in both sets.
+ """
return self.union(other)
def difference(self, other):
+ """
+ Return the difference of two sets as a new set.
+ """
symbols = self._xsymbols([self, other])
islset1 = self._toislset(self.polyhedra, symbols)
islset2 = other._toislset(other.polyhedra, symbols)
return self._fromislset(islset, symbols)
def __sub__(self, other):
+ """
+ Return the difference of two sets as a new set.
+ """
return self.difference(other)
def lexmin(self):
+ """
+ Return a new set containing the lexicographic minimum of the elements in the set.
+ """
islset = self._toislset(self.polyhedra, self.symbols)
islset = libisl.isl_set_lexmin(islset)
return self._fromislset(islset, self.symbols)
def lexmax(self):
+ """
+ Return a new set containing the lexicographic maximum of the elements in the set.
+ """
islset = self._toislset(self.polyhedra, self.symbols)
islset = libisl.isl_set_lexmax(islset)
return self._fromislset(islset, self.symbols)
-
+
def num_parameters(self):
- #could be useful with large, complicated polyhedrons
+ """
+ Return the total number of parameters, input, output or set dimensions.
+ """
islbset = self._toislbasicset(self.equalities, self.inequalities, self.symbols)
num = libisl.isl_basic_set_dim(islbset, libisl.isl_dim_set)
return num
-
+
def involves_dims(self, dims):
- #could be useful with large, complicated polyhedrons
+ """
+ Returns true if set depends on given dimensions.
+ """
islset = self._toislset(self.polyhedra, self.symbols)
dims = sorted(dims)
symbols = sorted(list(self.symbols))
for dim in dims:
if dim in symbols:
first = symbols.index(dims[0])
- n +=1
+ n +=1
else:
first = 0
- else:
- return False
+ else:
+ return False
value = bool(libisl.isl_set_involves_dims(islset, libisl.isl_dim_set, first, n))
libisl.isl_set_free(islset)
return value
-
+
+ _RE_COORDINATE = re.compile(r'\((?P<num>\-?\d+)\)(/(?P<den>\d+))?')
+
def vertices(self):
- if self.isbounded():
- islbset = self._toislbasicset(self.equalities, self.inequalities, self.symbols)
- vertices = libisl.isl_basic_set_compute_vertices(islbset);
- vertexes = islhelper.isl_vertices_vertices(vertices)
- #vertex = libisl.isl_vertices_get_n_vertices(vertices)
- for verts in vertexes:
- expr = libisl.isl_vertex_get_expr(verts);
- this = islhelper.isl_set_to_str(expr)
- print(this)
- else:
- raise TypeError('set must be bounded')
- return string
+ """
+ Return a list of vertices for this Polygon.
+ """
+ from .polyhedra import Polyhedron
+ if not self.isbounded():
+ raise ValueError('domain must be bounded')
+ islbset = self._toislbasicset(self.equalities, self.inequalities, self.symbols)
+ vertices = libisl.isl_basic_set_compute_vertices(islbset);
+ vertices = islhelper.isl_vertices_vertices(vertices)
+ points = []
+ for vertex in vertices:
+ expr = libisl.isl_vertex_get_expr(vertex)
+ coordinates = []
+ if islhelper.isl_version < '0.13':
+ constraints = islhelper.isl_basic_set_constraints(expr)
+ for constraint in constraints:
+ constant = libisl.isl_constraint_get_constant_val(constraint)
+ constant = islhelper.isl_val_to_int(constant)
+ for index, symbol in enumerate(self.symbols):
+ coefficient = libisl.isl_constraint_get_coefficient_val(constraint,
+ libisl.isl_dim_set, index)
+ coefficient = islhelper.isl_val_to_int(coefficient)
+ if coefficient != 0:
+ coordinate = -Fraction(constant, coefficient)
+ coordinates.append((symbol, coordinate))
+ else:
+
+ # horrible hack, find a cleaner solution
+ string = islhelper.isl_multi_aff_to_str(expr)
+ matches = self._RE_COORDINATE.finditer(string)
+ for symbol, match in zip(self.symbols, matches):
+ numerator = int(match.group('num'))
+ denominator = match.group('den')
+ denominator = 1 if denominator is None else int(denominator)
+ coordinate = Fraction(numerator, denominator)
+ coordinates.append((symbol, coordinate))
+ points.append(Point(coordinates))
+ return points
def points(self):
- bounds = {}
- coordinates = []
- symbols = self.symbols
- if self.isbounded():
- islset = self._toislset(self.polyhedra, self.symbols)
- points = islhelper.isl_set_points(islset)
- for sym in symbols:
- for point in points:
- coordinate = libisl.isl_point_get_coordinate_val(point, libisl.isl_dim_set, symbols.index(sym))
- coordinate = islhelper.isl_val_to_int(coordinate)
- coordinates.append(coordinate)
- else:
- raise TypeError('set must be bounded')
- return coordinates
-
+ """
+ Returns the points contained in the set.
+ """
+ if not self.isbounded():
+ raise ValueError('domain must be bounded')
+ from .polyhedra import Universe, Eq
+ islset = self._toislset(self.polyhedra, self.symbols)
+ islpoints = islhelper.isl_set_points(islset)
+ points = []
+ for islpoint in islpoints:
+ coordinates = {}
+ for index, symbol in enumerate(self.symbols):
+ coordinate = libisl.isl_point_get_coordinate_val(islpoint,
+ libisl.isl_dim_set, index)
+ coordinate = islhelper.isl_val_to_int(coordinate)
+ coordinates[symbol] = coordinate
+ points.append(Point(coordinates))
+ return points
+
+ def __contains__(self, point):
+ for polyhedron in self.polyhedra:
+ if point in polyhedron:
+ return True
+ return False
+
+ def subs(self, symbol, expression=None):
+ polyhedra = [polyhedron.subs(symbol, expression)
+ for polyhedron in self.polyhedra]
+ return Domain(*polyhedra)
+
@classmethod
def _fromislset(cls, islset, symbols):
from .polyhedra import Polyhedron
islset = libisl.isl_set_remove_divs(islset)
- islbsets = isl_set_basic_sets(islset)
+ islbsets = islhelper.isl_set_basic_sets(islset)
libisl.isl_set_free(islset)
polyhedra = []
for islbset in islbsets:
self._dimension = len(self._symbols)
return self
+ @classmethod
def _toislset(cls, polyhedra, symbols):
polyhedron = polyhedra[0]
islbset = polyhedron._toislbasicset(polyhedron.equalities,
strings = [repr(polyhedron) for polyhedron in self.polyhedra]
return 'Or({})'.format(', '.join(strings))
+ def _repr_latex_(self):
+ strings = []
+ for polyhedron in self.polyhedra:
+ strings.append('({})'.format(polyhedron._repr_latex_().strip('$')))
+ return '${}$'.format(' \\vee '.join(strings))
+
@classmethod
def fromsympy(cls, expr):
import sympy
def And(*domains):
+ """
+ Return the intersection of two sets as a new set.
+ """
if len(domains) == 0:
from .polyhedra import Universe
return Universe
return domains[0].intersection(*domains[1:])
def Or(*domains):
+ """
+ Return the union of sets as a new set.
+ """
if len(domains) == 0:
from .polyhedra import Empty
return Empty
return domains[0].union(*domains[1:])
def Not(domain):
+ """
+ Returns the complement of this set.
+ """
return ~domain
projects / linpy.git / blobdiff