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// info.h
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Copyright 2005-2010 Google, Inc.
// Author: riley@google.com (Michael Riley)
//
// \file
// Prints information about a PDT.
#ifndef FST_EXTENSIONS_PDT_INFO_H__
#define FST_EXTENSIONS_PDT_INFO_H__
#include <unordered_map>
using std::tr1::unordered_map;
using std::tr1::unordered_multimap;
#include <unordered_set>
using std::tr1::unordered_set;
using std::tr1::unordered_multiset;
#include <vector>
using std::vector;
#include <fst/fst.h>
#include <fst/extensions/pdt/pdt.h>
namespace fst {
// Compute various information about PDTs, helper class for pdtinfo.cc.
template <class A> class PdtInfo {
public:
typedef A Arc;
typedef typename A::StateId StateId;
typedef typename A::Label Label;
typedef typename A::Weight Weight;
PdtInfo(const Fst<A> &fst,
const vector<pair<typename A::Label,
typename A::Label> > &parens);
const string& FstType() const { return fst_type_; }
const string& ArcType() const { return A::Type(); }
int64 NumStates() const { return nstates_; }
int64 NumArcs() const { return narcs_; }
int64 NumOpenParens() const { return nopen_parens_; }
int64 NumCloseParens() const { return nclose_parens_; }
int64 NumUniqueOpenParens() const { return nuniq_open_parens_; }
int64 NumUniqueCloseParens() const { return nuniq_close_parens_; }
int64 NumOpenParenStates() const { return nopen_paren_states_; }
int64 NumCloseParenStates() const { return nclose_paren_states_; }
private:
string fst_type_;
int64 nstates_;
int64 narcs_;
int64 nopen_parens_;
int64 nclose_parens_;
int64 nuniq_open_parens_;
int64 nuniq_close_parens_;
int64 nopen_paren_states_;
int64 nclose_paren_states_;
DISALLOW_COPY_AND_ASSIGN(PdtInfo);
};
template <class A>
PdtInfo<A>::PdtInfo(const Fst<A> &fst,
const vector<pair<typename A::Label,
typename A::Label> > &parens)
: fst_type_(fst.Type()),
nstates_(0),
narcs_(0),
nopen_parens_(0),
nclose_parens_(0),
nuniq_open_parens_(0),
nuniq_close_parens_(0),
nopen_paren_states_(0),
nclose_paren_states_(0) {
unordered_map<Label, size_t> paren_map;
unordered_set<Label> paren_set;
unordered_set<StateId> open_paren_state_set;
unordered_set<StateId> close_paren_state_set;
for (size_t i = 0; i < parens.size(); ++i) {
const pair<Label, Label> &p = parens[i];
paren_map[p.first] = i;
paren_map[p.second] = i;
}
for (StateIterator< Fst<A> > siter(fst);
!siter.Done();
siter.Next()) {
++nstates_;
StateId s = siter.Value();
for (ArcIterator< Fst<A> > aiter(fst, s);
!aiter.Done();
aiter.Next()) {
const A &arc = aiter.Value();
++narcs_;
typename unordered_map<Label, size_t>::const_iterator pit
= paren_map.find(arc.ilabel);
if (pit != paren_map.end()) {
Label open_paren = parens[pit->second].first;
Label close_paren = parens[pit->second].second;
if (arc.ilabel == open_paren) {
++nopen_parens_;
if (!paren_set.count(open_paren)) {
++nuniq_open_parens_;
paren_set.insert(open_paren);
}
if (!open_paren_state_set.count(arc.nextstate)) {
++nopen_paren_states_;
open_paren_state_set.insert(arc.nextstate);
}
} else {
++nclose_parens_;
if (!paren_set.count(close_paren)) {
++nuniq_close_parens_;
paren_set.insert(close_paren);
}
if (!close_paren_state_set.count(s)) {
++nclose_paren_states_;
close_paren_state_set.insert(s);
}
}
}
}
}
}
template <class A>
void PrintPdtInfo(const PdtInfo<A> &pdtinfo) {
ios_base::fmtflags old = cout.setf(ios::left);
cout.width(50);
cout << "fst type" << pdtinfo.FstType().c_str() << endl;
cout.width(50);
cout << "arc type" << pdtinfo.ArcType().c_str() << endl;
cout.width(50);
cout << "# of states" << pdtinfo.NumStates() << endl;
cout.width(50);
cout << "# of arcs" << pdtinfo.NumArcs() << endl;
cout.width(50);
cout << "# of open parentheses" << pdtinfo.NumOpenParens() << endl;
cout.width(50);
cout << "# of close parentheses" << pdtinfo.NumCloseParens() << endl;
cout.width(50);
cout << "# of unique open parentheses"
<< pdtinfo.NumUniqueOpenParens() << endl;
cout.width(50);
cout << "# of unique close parentheses"
<< pdtinfo.NumUniqueCloseParens() << endl;
cout.width(50);
cout << "# of open parenthesis dest. states"
<< pdtinfo.NumOpenParenStates() << endl;
cout.width(50);
cout << "# of close parenthesis source states"
<< pdtinfo.NumCloseParenStates() << endl;
cout.setf(old);
}
} // namespace fst
#endif // FST_EXTENSIONS_PDT_INFO_H__
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