import functools
import numbers
import ctypes, ctypes.util
-from pypol import isl
from fractions import Fraction, gcd
+from . import isl, islhelper
+
+
libisl = ctypes.CDLL(ctypes.util.find_library('isl'))
libisl.isl_printer_get_str.restype = ctypes.c_char_p
'empty', 'universe'
]
-
-_CONTEXT = isl.Context()
+'''
+def symbolToInt(self):
+ make dictionary of key:value (letter:integer)
+ iterate through the dictionary to find matching symbol
+ return the given integer value
+ d = {'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5, 'f': 6, 'g': 7, 'h': 8, 'i': 6, 'j': 10, 'k': 11, 'l': 12, 'm': 13, 'n': 14,
+ 'o': 15, 'p': 16, 'q': 17, 'r': 18, 's': 19, 't': 20, 'u': 21, 'v': 22, 'w': 23, 'x': 24, 'y': 25, 'z': 26}
+ if self in d:
+ num = d.get(self)
+ return num
+'''
+
+ids = {}
+
+def get_ids(co):
+ if co in ids:
+ return ids.get(co)
+ else:
+ idd = len(ids)
+ ids[co] = idd
+ print(ids)
+ return idd
def _polymorphic_method(func):
@functools.wraps(func)
raise TypeError('arguments must be linear expressions')
return wrapper
+class Context:
+
+ __slots__ = ('_ic')
+
+ def __init__(self):
+ self._ic = libisl.isl_ctx_alloc()
+
+ @property
+ def _as_parameter_(self):
+ return self._ic
+
+ #comment out so does not delete itself after being created
+ #def __del__(self):
+ # libisl.isl_ctx_free(self)
+
+ def __eq__(self, other):
+ if not isinstance(other, Context):
+ return False
+ return self._ic == other._ic
+
+
+
class Expression:
"""
if value.denominator != 1:
raise TypeError('non-integer constraint: '
'{} <= 0'.format(constraint))
- self._inequalities.append(constraint)
+ self._inequalities.append(constraint)
self._bset = self.to_isl()
- return self._bset
-
-
+ #print(self._bset)
+ #put this here just to test from isl method
+ #from_isl = self.from_isl(self._bset)
+ #print(from_isl)
+ #rint(self)
+ return self._bset
+
+
@property
def equalities(self):
yield from self._equalities
@property
def inequalities(self):
yield from self._inequalities
-
+
@property
def constant(self):
return self._constant
def isconstant(self):
return len(self._coefficients) == 0
-
-
+
+
def isempty(self):
return bool(libisl.isl_basic_set_is_empty(self._bset))
for constraint in self.constraints():
s.update(constraint.symbols)
yield from sorted(s)
-
- def symbol_count(self):
- s = []
- for constraint in self.constraints():
- s.append(constraint.symbols)
- return s
-
+
@property
def dimension(self):
return len(self.symbols())
return False
else:
return True
-
+
def __contains__(self, value):
# is the value in the polyhedron?
# test whether every element in other is in the polyhedron
for value in other:
if value == self.constraints():
- return True
+ return True
else:
- return False
+ return False
raise NotImplementedError
def __ge__(self, other):
@classmethod
def fromstring(cls, string):
raise NotImplementedError
-
+
def to_isl(self):
- space = libisl.isl_space_set_alloc(_CONTEXT, 0, len(self.symbol_count()))
+ #d = Expression().__dict__ #write expression values to dictionary in form {'_constant': value, '_coefficients': value}
+ d = {'_constant': 2, '_coefficients': {'b':1}}
+ coeff = d.get('_coefficients')
+ num_coefficients = len(coeff)
+ space = libisl.isl_space_set_alloc(Context(), 0, num_coefficients)
bset = libisl.isl_basic_set_empty(libisl.isl_space_copy(space))
ls = libisl.isl_local_space_from_space(libisl.isl_space_copy(space))
ceq = libisl.isl_equality_alloc(libisl.isl_local_space_copy(ls))
cin = libisl.isl_inequality_alloc(libisl.isl_local_space_copy(ls))
- d = Expression().__dict__ #write expression values to dictionary in form {'_constant': value, '_coefficients': value}
- '''
- if there are equalities/inequalities, take each constant and coefficient and add as a constraint to the basic set
- need to change the symbols method to a lookup table for the integer value for each letter that could be a symbol
- '''
+ '''if there are equalities/inequalities, take each constant and coefficient and add as a constraint to the basic set
+ need to change the symbols method to a lookup table for the integer value for each letter that could be a symbol'''
if self._equalities:
if '_constant' in d:
value = d.get('_constant')
ceq = libisl.isl_constraint_set_constant_si(ceq, value)
- if '_coefficients' in d:
+ if '_coefficients' in d:
value_co = d.get('_coefficients')
- if value_co: #if dictionary not empty add coefficient as to constraint
- ceq = libisl.isl_constraint_set_coefficient_si(ceq, libisl.isl_set_dim, self.symbols(), value_co)
- bset = libisl.isl_set_add_constraint(bset, ceq)
-
- if self._inequalities:
+ for co in value_co:
+ num = value_co.get(co)
+ ceq = libisl.isl_constraint_set_coefficient_si(ceq, islhelper.isl_dim_set, get_ids(co), num)
+ bset = libisl.isl_set_add_constraint(bset, ceq)
+
+ if self._inequalities:
if '_constant' in d:
value = d.get('_constant')
- cin = libisl.isl_constraint_set_constant_si(cin, value)
- if '_coefficients' in d:
- value_co = d.get('_coefficients')
- if value_co: #if dictionary not empty add coefficient as to constraint
- cin = libisl.isl_constraint_set_coefficient_si(cin, libisl.isl_set_dim, self.symbols(), value_co)
- bset = libisl.isl_set_add_constraint(bset, cin)
- ip = libisl.isl_printer_to_str(_CONTEXT) #create string printer
- ip = libisl.isl_printer_print_set(ip, bset) #print set to printer
+ cin = libisl.isl_constraint_set_constant_si(cin, value)
+ if '_coefficients' in d:
+ value_co = d.get('_coefficients')
+ for co in value_co:
+ num = value_co.get(co)
+ if value_co: #if dictionary not empty add coefficient as to constraint
+ cin = libisl.isl_constraint_set_coefficient_si(cin, islhelper.isl_dim_set, get_ids(co), num)
+ bset = libisl.isl_set_add_constraint(bset, cin)
+ ip = libisl.isl_printer_to_str(Context()) #create string printer
+ ip = libisl.isl_printer_print_set(ip, bset) #print set to printer
string = libisl.isl_printer_get_str(ip) #get string from printer
+ string = str(string)
print(string)
- return bset
+ return string
+
+
+ def from_isl(self, bset):
+ '''takes basic set in isl form and puts back into python version of polyhedron
+ isl example code gives idl form as:
+ "{[i] : exists (a : i = 2a and i >= 10 and i <= 42)}");'''
+
+ poly = 0
+ return poly
-empty = eq(1, 1)
+empty = eq(1,1)
universe = Polyhedron()
projects / linpy.git / blobdiff