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// pdtreplace.cc
// 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)
//
#include <utility>
using std::pair; using std::make_pair;
#include <vector>
using std::vector;
#include <fst/extensions/pdt/pdtscript.h>
#include <fst/vector-fst.h>
#include <fst/util.h>
DEFINE_string(pdt_parentheses, "", "PDT parenthesis label pairs.");
int main(int argc, char **argv) {
namespace s = fst::script;
string usage = "Recursively replace Fst arcs with other Fst(s).\n";
usage += " Usage: ";
usage += argv[0];
usage += " root.fst rootlabel [rule1.fst label1 ...] [out.fst]\n";
std::set_new_handler(FailedNewHandler);
SetFlags(usage.c_str(), &argc, &argv, true);
if (argc < 4) {
ShowUsage();
return 1;
}
string in_fname = argv[1];
string out_fname = argc % 2 == 0 ? argv[argc - 1] : "";
s::FstClass *ifst = s::FstClass::Read(in_fname);
if (!ifst) return 1;
typedef int64 Label;
typedef pair<Label, const s::FstClass* > FstTuple;
vector<FstTuple> fst_tuples;
Label root = atoll(argv[2]);
fst_tuples.push_back(make_pair(root, ifst));
for (size_t i = 3; i < argc - 1; i += 2) {
ifst = s::FstClass::Read(argv[i]);
if (!ifst) return 1;
Label lab = atoll(argv[i + 1]);
fst_tuples.push_back(make_pair(lab, ifst));
}
s::VectorFstClass ofst(ifst->ArcType());
vector<pair<int64, int64> > parens;
s::PdtReplace(fst_tuples, &ofst, &parens, root);
if (!FLAGS_pdt_parentheses.empty())
fst::WriteLabelPairs(FLAGS_pdt_parentheses, parens);
ofst.Write(out_fname);
return 0;
}
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