/usr/lib/python2.7/dist-packages/brial/blocks.py is in python-brial 0.8.5-4.
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import sys
if __name__ == '__main__':
import pathadjuster
from .PyPolyBoRi import Ring, VariableBlock, Polynomial
from .PyPolyBoRi import VariableFactory, MonomialFactory
from itertools import chain, islice
#class BlockEndException(object):
#pass
#def __init__(self, arg):
# self.arg = arg
# pass
class Block(object):
"""The block class represents a block of variables
<var_name>(start_index,...,start_index+size-1), it is the preferred
block type for simple one-dimensional variable sets"""
def __init__(self, var_name, size, start_index=0, reverse=False):
indices = range(start_index, start_index + size)
if reverse:
indices = reversed(indices)
#self.index2pos=dict([(v,k) for (k,v) in enumerate(indices)])
self.names = [var_name + "(" + str(i) + ")" for i in indices]
self.var_name = var_name
self.start_index = start_index
self.reverse = reverse
self.size = size
def __iter__(self):
return iter(self.names)
def __getitem__(self, i):
return self.names[i]
def __len__(self):
return self.size
def register(self, start, context):
#def var_func(i):
# return Variable(self.index2pos[i]+start)
ring_context = context
while isinstance(ring_context, PrefixedDictProxy):
ring_context = ring_context.wrapped
ring = ring_context['r']
var_func = VariableBlock(self.size, self.start_index, start, self.
reverse, ring)
var_func.__name__ = self.var_name
context[self.var_name] = var_func
class AlternatingBlock(object):
"""The Alternating Block class is used for doing tricky variable
schemes,where base names vary, e.g.
a(0),b(0),a(1),b(1),a(2),b(2)"""
def __init__(self, var_names, size_per_variable, start_index=0,
reverse=False):
self.var_names = var_names
self.size_per_variable = size_per_variable
self.reverse = reverse
indices = range(start_index, start_index + size_per_variable)
if reverse:
indices = reversed(indices)
names = []
for i in indices:
for n in var_names:
names.append(n + "(" + str(i) + ")")
self.indices = indices
self.index2pos = dict([(v, k) for (k, v) in enumerate(indices)])
self.names = names
def __len__(self):
return self.size_per_variable * len(self.var_names)
def __iter__(self):
return iter(self.names)
def __getitem__(self, i):
return self.names[i]
def register(self, start, context):
def gen_var_func(var_pos):
class var_factory(object):
def __init__(self, ring, index2pos, size):
self.ring = ring
self.index2pos = index2pos
self.size = size
def __call__(self, idx):
return self.ring.variable(self.index2pos[idx] * self.size +
var_pos + start)
ring_context = context
while isinstance(ring_context, PrefixedDictProxy):
ring_context = ring_context.wrapped
ring = ring_context['r']
return var_factory(ring, self.index2pos, len(self.var_names))
for (var_pos, n) in enumerate(self.var_names):
var_func = gen_var_func(var_pos)
var_func.__name__ = n
context[n] = var_func
def shift(f, i):
def g(j):
return f(i + j)
g.__name__ = f.__name__
return g
class AdderBlock(AlternatingBlock):
def __init__(self, adder_bits, sums="s", carries="c", input1="a",
input2="b", start_index=0):
AlternatingBlock.__init__(self, (sums, carries, input1, input2),
adder_bits, start_index=start_index, reverse=True)
self.input1 = input1
self.input2 = input2
self.sums = sums
self.carries = carries
self.start_index = start_index
self.adder_bits = adder_bits
def register(self, start, context):
super(AdderBlock, self).register(start, context)
a = context[self.input1]
b = context[self.input2]
self.s = shift(context[self.sums], self.start_index)
self.c = shift(context[self.carries], self.start_index)
a = shift(a, self.start_index)
b = shift(b, self.start_index)
carries = [Polynomial(a(0).ring().zero())]
for i in range(self.adder_bits):
#print i, ":"
c = 1 + (1 + a(i) * b(i)) * (1 + carries[-1] * a(i)) * (1 +
carries[-1] * b(i))
carries.append(c)
self.add_results = [a(i) + b(i) + carries[i] for i in range(self.
adder_bits)]
self.carries_polys = carries[1:]
#def s(i):
# return self.add_results[i-self.start_index]
#def c(i):
# return self.carries_polys[i-self.start_index]
#context[self.sums]=s
#context[self.carries]=c
def implement(self, equations):
for i in range(self.adder_bits):
equations.append(self.s(i) + self.add_results[i])
equations.append(self.c(i) + self.carries_polys[i])
pass
class HigherOrderBlock(object):
"""HigherOrderBlocks are multidimensional blocks of variables, for each dimension a seperate start_index and size can be specified
var_name : variables will be called <var_name>(multiindex), where multiindex is a tuple of the size <size_tuple>
size_tuple : specifies the sizes of the ranges of each component of the multi-indices
start_index_tuple : the multi-indices will be of the form start_index_tuple + a, where a is a multi-index with non-negative components
"""
def __init__(self, var_name, size_tuple, start_index_tuple=None,
reverse=False):
if start_index_tuple is None:
start_index_tuple = len(size_tuple) * (0, )
cart = [()]
assert len(size_tuple) == len(start_index_tuple)
outer_indices = reversed(range(len(size_tuple)))
for i in outer_indices:
s_i = start_index_tuple[i]
s = size_tuple[i]
#print "cart", cart
cart = [(j, ) + c for j in range(s_i, s_i + s) for c in cart]
if reverse:
cart.reverse()
self.cart = cart
self.cart2index = dict([(v, k) for (k, v) in enumerate(cart)])
self.var_name = var_name
self.names = [var_name + str(c) for c in cart]
pass
def __getitem__(self, i):
return self.names[i]
def __iter__(self):
return iter(self.names)
def __len__(self):
return len(self.names)
def register(self, start, context):
def var_func(*indices):
return Variable(self.cart2index[indices] + start)
var_func.__name__ = self.var_name
context[self.var_name] = var_func
class InOutBlock(object):
def __init__(self, out_size, in_size, output="out", input="in",
in_start_index=0, out_start_index=0,
out_reverse=False, in_reverse=False):
self.output = Block(var_name=output, start_index=out_start_index,
size=out_size, reverse=out_reverse)
self.input = Block(var_name=input, start_index=in_start_index,
size=in_size, reverse=in_reverse)
self.out_start_index = out_start_index
self.in_start_index = in_start_index
def __iter__(self):
return chain(self.output, self.input)
def __getitem__(self, i):
if (i < len(self.output)):
return self.output[i]
else:
return self.input[i - len(self.output)]
def __len__(self):
return len(self.output) + len(self.input)
def register(self, start, context):
self.output.register(start, context)
self.input.register(start + len(self.output), context)
self.out_vars = shift(context[self.output.var_name], self.
out_start_index)
self.in_vars = shift(context[self.input.var_name], self.in_start_index)
pass
class MultiBlock(object):
def __init__(self, sizes=[], var_names=["v"], start_indices=[], reverses=[
]):
self.start_indices = start_indices + [0] * (len(var_names) - len(
start_indices))
reverses += [False] * (len(var_names) - len(reverses))
sizes += [1] * (len(var_names) - len(sizes))
self.blocks = [Block(var_name=var_names[idx], size=sizes[idx],
start_index=self.start_indices[idx], reverse=reverses[idx]) for
idx in range(len(var_names))]
def __iter__(self):
return chain(*self.blocks)
def __getitem__(self, i):
return next(islice(chain(*self.blocks), i, i + 1))
# sum([bl.names for bl in self.blocks])[i]
def __len__(self):
return sum((len(bl) for bl in self.blocks))
def register(self, start, context):
offset = 0
for bl in self.blocks:
bl.register(start + offset, context)
offset += len(bl)
self.vars = [shift(context[self.blocks[idx].var_name], self.
start_indices[idx]) for idx in range(len(self.blocks))]
class PrefixedDictProxy(object):
"""docstring for PrefixedDictProxy"""
def __init__(self, wrapped, prefix):
super(PrefixedDictProxy, self).__init__()
self.wrapped = wrapped
self.prefix = prefix
def __getitem__(self, k):
try:
return self.wrapped[self.prefix + k]
except KeyError:
print(self.prefix, k, list(self.wrapped))
raise KeyError
def __setitem__(self, k, v):
self.wrapped[self.prefix + k] = v
class MacroBlock(object):
def __init__(self, prefix):
self.prefix = prefix
self.blocks = []
self.combinations = []
self.connections = []
def declare(self, blocks):
self.blocks = blocks
def connect(self, combinations):
self.combinations = combinations
def __iter__(self):
return (self.prefix + "_" + n for n in chain(*self.blocks))
def __getitem__(self, i):
return self.prefix + "_" + next(islice(chain(*self.blocks), i, i + 1))
#for bl in self.blocks:
# if i >= len(bl):
# i -= len(bl)
# else:
# return bl[i]
def __len__(self):
return sum((len(bl) for bl in self.blocks))
def resolve(self, localname):
return self.prefix + "_" + localname
def register(self, start, context):
context = PrefixedDictProxy(context, self.prefix + "_")
offset = 0
for bl in self.blocks:
bl.register(start + offset, context)
offset += len(bl)
for ((con1, indices1), (con2, indices2)) in self.combinations:
for idx in range(min(len(indices1), len(indices2))):
self.connections += [context[con1](indices1[idx]) + context[
con2](indices2[idx])]
def implement(self, equations):
for bl in self.blocks:
if hasattr(bl, "implement"):
bl.implement(equations)
equations += self.connections
class IfThen(object):
def __init__(self, ifpart, thenpart, supposed_to_be_valid=True):
self.ifpart = [Polynomial(p) for p in ifpart]
self.thenpart = [Polynomial(p) for p in thenpart]
self.supposedToBeValid = supposed_to_be_valid
def __str__(self):
return ("If(AND(" + ", ".join([str(p) + " == 0" for p in self.ifpart])
+ ")), THEN " + ", ".join([str(p) + " == 0" for p in self.thenpart
]))
def if_then(i, t, supposed_to_be_valid=True):
return IfThen(i, t, supposed_to_be_valid)
def declare_ring(blocks, context=None):
"""Declare Ring is the preferred function to create a ring and declare a variable scheme,
the number of variables is automatically determined,
usually you pass globals() as context argument to store the ring and the variable mapping.
Example
declare_ring([Block("x",10),Block("y",5)],globals())
gives a ring with x(0..9),y(0..4) and registers the ring as r,
and the variable blocks x and y in the context dictionary globals(), which consists of the global variables of the python module
"""
if context is None:
context = sys.modules['__main__'].__dict__
def canonicalize(blocks):
for elt in blocks:
if isinstance(elt, str):
yield elt
else:
for subelt in elt:
yield subelt
blocks = list(blocks)
n = 0
for b in blocks:
if isinstance(b, str):
n = n + 1
else:
n = n + len(b)
r = Ring(n, names=canonicalize(blocks))
context["internalVariable"] = VariableFactory(r)
# context["Monomial"] = MonomialFactory(r)
context["r"] = r
declare_block_scheme(blocks, context)
return r
def declare_block_scheme(blocks, context):
start = 0
block_starts = []
ring = context["r"]
for b in blocks:
if start != 0:
block_starts.append(start)
if isinstance(b, str):
context[b] = context["internalVariable"](start)
#_cpp_set_variable_name(ring, start, b)
start = start + 1
else:
b.register(start, context)
#for (pos,name) in enumerate(b):
# _cpp_set_variable_name(ring, start+pos, name)
start = start + len(b)
context["block_start_hints"] = block_starts
context["number_of_declared_vars"] = start
def main():
r = Ring(1000)
ablock = AlternatingBlock(["a", "b", "c"], 100)
declare_block_scheme([ablock], globals())
for i in range(10):
print(r.variable(i))
print(list(ablock))
declare_block_scheme([
Block(var_name="x", size=100),
HigherOrderBlock("y", (3, 4, 11, 2)),
AlternatingBlock(["a", "b", "c"], 100)],
globals())
for i in range(10):
print(x(i))
print(y(0, 0, 0, 0))
print(y(0, 0, 0, 1))
print(y(0, 0, 1, 0))
print(y(0, 0, 1, 1))
print(a(0), a(1), a(2), b(0), b(1), c(0))
declare_block_scheme([
Block(var_name="x", size=100, reverse=True),
HigherOrderBlock("y", (3, 4, 11, 2), reverse=True),
AlternatingBlock(["a", "b", "c"], 100, reverse=True)],
globals())
for i in range(10):
print(x(i))
print(y(0, 0, 0, 0))
print(y(0, 0, 0, 1))
print(y(0, 0, 1, 0))
print(y(0, 0, 1, 1))
print(a(0), a(1), a(2), b(0), b(1), c(0))
declare_block_scheme(["a", "b", "c"], globals())
print(a, b, c)
if __name__ == '__main__':
main()
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