class SRule_r(SRule):
'''
Applies the transformation on one match.
'''
def __init__(self, LHS, RHS, external_matches_only=False, custom_resolution=lambda packet: False):
'''
Applies the transformation as long as matches can be found.
@param LHS: The pre-condition pattern (LHS + NACs).
@param RHS: The post-condition pattern (RHS).
@param max_iterations: The maximum number of times to apply the transformation.
@param external_matches_only: Resolve conflicts ignoring the matches found in this FRule.
@param custom_resolution: Override the default resolution function.
'''
super(SRule_r, self).__init__()
self.R = Resolver(external_matches_only=external_matches_only,
custom_resolution=custom_resolution)
def packet_in(self, packet):
self.exception = None
self.is_success = False
# Match
packet = self.M.packet_in(packet)
if not self.M.is_success:
self.exception = self.M.exception
return packet
# Choose the first match
packet = self.I.packet_in(packet)
if not self.I.is_success:
self.exception = self.I.exception
return packet
while True:
# Rewrite
packet = self.W.packet_in(packet)
if not self.W.is_success:
self.exception = self.W.exception
return packet
# Resolve any conflicts if necessary
packet = self.R.packet_in(packet)
if not self.R.is_success:
self.exception = self.R.exception
return packet
# Rule has been applied once, so it's a success anyway
self.is_success = True
if self.I.iterations == self.I.max_iterations:
return packet
# Re-Match
packet = self.M.packet_in(packet)
if not self.M.is_success:
self.exception = self.M.exception
return packet
# Choose another match
packet = self.I.next_in(packet)
# No more iterations are left
if not self.I.is_success:
if self.I.exception:
self.exception = self.I.exception
return packet
class XRule_r(XRule):
'''
Applies the transformation on one match with roll-back capability.
'''
def __init__(self, LHS, RHS, external_matches_only=False, custom_resolution=lambda packet: False):
'''
Applies the transformation on one match with roll-back capability.
@param LHS: The pre-condition pattern (LHS + NACs).
@param RHS: The post-condition pattern (RHS).
@param external_matches_only: Resolve conflicts ignoring the matches found in this ARule.
@param custom_resolution: Override the default resolution function.
'''
super(XRule_r, self).__init__()
self.R = Resolver(external_matches_only=external_matches_only,
custom_resolution=custom_resolution)
def packet_in(self, packet):
packet = super(XRule_r, self).packet_in(packet)
# is_success is True
if self.exception is None:
# Resolve any conflicts if necessary
packet = self.R.packet_in(packet)
if not self.R.is_success:
self.exception = self.R.exception
return packet
# Output success packet
else:
self.is_success = False
return packet
def next_in(self, packet):
packet = super(XRule_r, self).next_in(packet)
# is_success is True
if self.exception is None:
# Resolve any conflicts if necessary
packet = self.R.packet_in(packet)
if not self.R.is_success:
self.exception = self.R.exception
return packet
# Output success packet
else:
self.is_success = False
return packet
def __init__(self, LHS, RHS, external_matches_only=False, custom_resolution=lambda packet: False):
"""
Applies the transformation as long as matches can be found with roll-back capability.
@param LHS: The pre-condition pattern (LHS + NACs).
@param RHS: The post-condition pattern (RHS).
@param max_iterations: The maximum number of times to apply the rule.
@param external_matches_only: Resolve conflicts ignoring the matches found in this FRule.
@param custom_resolution: Override the default resolution function.
"""
super(XSRule_r, self).__init__()
self.R = Resolver(external_matches_only=external_matches_only, custom_resolution=custom_resolution)
def __init__(self, LHS, RHS, external_matches_only=False, custom_resolution=lambda packet: False):
'''
Applies the transformation on one match with roll-back capability.
@param LHS: The pre-condition pattern (LHS + NACs).
@param RHS: The post-condition pattern (RHS).
@param external_matches_only: Resolve conflicts ignoring the matches found in this ARule.
@param custom_resolution: Override the default resolution function.
'''
super(XRule_r, self).__init__()
self.R = Resolver(external_matches_only=external_matches_only,
custom_resolution=custom_resolution)
def __init__(self, LHS, RHS, external_matches_only=False, custom_resolution=lambda packet: False):
"""
Applies an inner rule for each application of the outer rule.
@param LHS: The pre-condition pattern (LHS + NACs).
@param RHS: The post-condition pattern (RHS).
@param inner_rule: The rule to apply in the loop.
@param outer_first: Whether the outer rule should be applied before the inner rule.
@param max_iterations: The maximum number of matches of the LHS.
@param external_matches_only: Resolve conflicts ignoring the matches found in this FRule.
@param custom_resolution: Override the default resolution function.
"""
super(LFRule_r, self).__init__()
self.R = Resolver(external_matches_only=external_matches_only, custom_resolution=custom_resolution)
class XFRule_r(XFRule):
'''
Applies the transformation on one match.
'''
def __init__(self, LHS, RHS, external_matches_only=False, custom_resolution=lambda packet: False):
'''
Applies the transformation on all matches found with roll-back capability.
@param LHS: The pre-condition pattern (LHS + NACs).
@param RHS: The post-condition pattern (RHS).
@param max_iterations: The maximum number of times to apply the rule.
@param external_matches_only: Resolve conflicts ignoring the matches found in this FRule.
@param custom_resolution: Override the default resolution function.
'''
super(XFRule_r, self).__init__()
self.R = Resolver(external_matches_only=external_matches_only,
custom_resolution=custom_resolution)
def packet_in(self, packet):
self.exception = None
self.is_success = False
# Checkpoint the original packet
self.B.packet_in(packet)
if not self.B.is_success:
self.exception = self.B.exception
return packet
# Match
packet = self.M.packet_in(packet)
if not self.M.is_success:
packet = self.B.restore(packet)
if self.M.exception:
self.exception = self.M.exception
elif self.B.exception:
self.exception = self.B.exception
return packet
# Choose the first match
packet = self.I.packet_in(packet)
if not self.I.is_success:
packet = self.B.restore(packet)
if self.I.exception:
self.exception = self.I.exception
elif self.B.exception:
self.exception = self.B.exception
return packet
while True:
# Rewrite
packet = self.W.packet_in(packet)
if not self.W.is_success:
packet = self.B.restore(packet)
if self.W.exception:
self.exception = self.W.exception
elif self.B.exception:
self.exception = self.B.exception
return packet
# Resolve any conflicts if necessary
packet = self.R.packet_in(packet)
if not self.R.is_success:
self.exception = self.R.exception
return packet
# Choose another match
packet = self.I.next_in(packet)
# No more iterations are left
if not self.I.is_success:
if self.I.exception:
packet = self.B.restore(packet)
if self.B.exception:
self.exception = self.B.exception
self.exception = self.I.exception
self.is_success = False
else:
# Output success packet
self.is_success = True
return packet
class LFRule_r(LFRule):
"""
Applies an inner rule for each application of the outer rule.
"""
def __init__(self, LHS, RHS, external_matches_only=False, custom_resolution=lambda packet: False):
"""
Applies an inner rule for each application of the outer rule.
@param LHS: The pre-condition pattern (LHS + NACs).
@param RHS: The post-condition pattern (RHS).
@param inner_rule: The rule to apply in the loop.
@param outer_first: Whether the outer rule should be applied before the inner rule.
@param max_iterations: The maximum number of matches of the LHS.
@param external_matches_only: Resolve conflicts ignoring the matches found in this FRule.
@param custom_resolution: Override the default resolution function.
"""
super(LFRule_r, self).__init__()
self.R = Resolver(external_matches_only=external_matches_only, custom_resolution=custom_resolution)
def packet_in(self, packet):
self.exception = None
self.is_success = False
# Match
packet = self.M.packet_in(packet)
if not self.M.is_success:
self.exception = self.M.exception
return packet
# Choose the first match
packet = self.I.packet_in(packet)
if not self.I.is_success:
self.exception = self.I.exception
return packet
while True:
if self.outer_first:
# Rewrite
packet = self.W.packet_in(packet)
if not self.W.is_success:
self.exception = self.W.exception
return packet
# Resolve any conflicts if necessary
packet = self.R.packet_in(packet)
if not self.R.is_success:
self.exception = self.R.exception
return packet
# Apply the inner rule
packet = self.inner_rule.packet_in(packet)
if not self.inner_rule.is_success:
self.exception = self.inner_rule.exception
return packet
if not self.outer_first:
# Rewrite
packet = self.W.packet_in(packet)
if not self.W.is_success:
self.exception = self.W.exception
return packet
# Resolve any conflicts if necessary
packet = self.R.packet_in(packet)
if not self.R.is_success:
self.exception = self.R.exception
return packet
# Choose another match
packet = self.I.next_in(packet)
# No more iterations are left
if not self.I.is_success:
if self.I.exception:
self.exception = self.I.exception
else:
# Output success packet
self.is_success = True
return packet