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annotate pyrect/regexp/dfa.py @ 43:83c69d42faa8

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replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
author Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
date Tue, 03 Aug 2010 05:35:38 +0900
parents
children 20a1c25d1fc9
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43
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
1 #!/usr/bin/env python
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
parents:
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2
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
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3 import curses.ascii as ascii
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
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4 import copy
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
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5 from fa import FA
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
parents:
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6
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
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7 class DFA(FA):
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
parents:
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8 def __init__(self, start, accepts, map_, states):
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
parents:
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9 def transition(state, input):
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Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
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10 return map_[state, input]
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
parents:
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11 FA.__init__(self, transition, start, accepts, map_, states)
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
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parents:
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12
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
parents:
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13 def get_runtime(self):
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Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
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14 return DFARuntime(self)
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
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parents:
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15
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
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16 class DFARuntime(object):
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
parents:
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17 def __init__(self, DFA):
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18 self.DFA = DFA
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19 self.curState = self.DFA.start
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20
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
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21 def do_transition(self, char):
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Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
parents:
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22 self.curState = self.DFA.transition(
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
parents:
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23 self.curState, char)
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
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24
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
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25 def is_accept_state(self):
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Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
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26 return self.curState in self.DFA.accepts
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27
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28 def accept(self, string):
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Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
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29 try:
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Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
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30 for alphabet in string:
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
parents:
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31 self.do_transition(alphabet)
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32 except KeyError:
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Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
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33 return False
83c69d42faa8 replace converting-flow, module dfareg with module regexp. it's is substantial changing in implimentation.
Ryoma SHINYA <shinya@firefly.cr.ie.u-ryukyu.ac.jp>
parents:
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34 return self.is_accept_state()