import functools
import re
-from . import islhelper
+from fractions import Fraction
+from . import islhelper
from .islhelper import mainctx, libisl, isl_set_basic_sets
from .linexprs import Expression, Symbol
libisl.isl_set_free(islset)
return value
+ _RE_COORDINATE = re.compile(r'\((?P<num>\-?\d+)\)(/(?P<den>\d+))?')
+
def vertices(self):
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);
if islhelper.isl_version < '0.13':
string = islhelper.isl_set_to_str(expr)
+ print(string)
+ # to be continued...
else:
+ # horrible hack, find a cleaner solution
string = islhelper.isl_multi_aff_to_str(expr)
- print(string)
+ matches = self._RE_COORDINATE.finditer(string)
+ point = {}
+ 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)
+ point[symbol] = coordinate
+ points.append(point)
+ return points
def points(self):
if not self.isbounded():
- raise ValueError('domain must be unbounded')
+ raise ValueError('domain must be bounded')
from .polyhedra import Universe, Eq
islset = self._toislset(self.polyhedra, self.symbols)
islpoints = islhelper.isl_set_points(islset)