1// fstprint.cc
2
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14//
15// Copyright 2005-2010 Google, Inc.
16// Author: riley@google.com (Michael Riley)
17// Modified: jpr@google.com (Jake Ratkiewicz) to use FstClass
18//
19// \file
20// Prints out binary FSTs in simple text format used by AT&T
21// (see http://www.research.att.com/projects/mohri/fsm/doc4/fsm.5.html).
22
23#include <fst/script/print.h>
24
25DEFINE_bool(acceptor, false, "Input in acceptor format");
26DEFINE_string(isymbols, "", "Input label symbol table");
27DEFINE_string(osymbols, "", "Output label symbol table");
28DEFINE_string(ssymbols, "", "State label symbol table");
29DEFINE_bool(numeric, false, "Print numeric labels");
30DEFINE_string(save_isymbols, "", "Save input symbol table to file");
31DEFINE_string(save_osymbols, "", "Save output symbol table to file");
32DEFINE_bool(show_weight_one, false,
33            "Print/draw arc weights and final weights equal to Weight::One()");
34DEFINE_bool(allow_negative_labels, false,
35            "Allow negative labels (not recommended; may cause conflicts)");
36
37int main(int argc, char **argv) {
38  namespace s = fst::script;
39  using fst::ostream;
40  using fst::SymbolTable;
41
42  string usage = "Prints out binary FSTs in simple text format.\n\n  Usage: ";
43  usage += argv[0];
44  usage += " [binary.fst [text.fst]]\n";
45
46  std::set_new_handler(FailedNewHandler);
47  SET_FLAGS(usage.c_str(), &argc, &argv, true);
48  if (argc > 3) {
49    ShowUsage();
50    return 1;
51  }
52
53  string in_name = (argc > 1 && strcmp(argv[1], "-") != 0) ? argv[1] : "";
54  string out_name = argc > 2 ? argv[2] : "";
55
56  s::FstClass *fst = s::FstClass::Read(in_name);
57  if (!fst) return 1;
58
59  ostream *ostrm = &cout;
60  string dest = "standard output";
61  if (argc == 3) {
62    dest = argv[2];
63    ostrm = new fst::ofstream(argv[2]);
64    if (!*ostrm) {
65      LOG(ERROR) << argv[0] << ": Open failed, file = " << argv[2];
66      return 1;
67    }
68  }
69  ostrm->precision(9);
70
71  const SymbolTable *isyms = 0, *osyms = 0, *ssyms = 0;
72
73  fst::SymbolTableTextOptions opts;
74  opts.allow_negative = FLAGS_allow_negative_labels;
75
76  if (!FLAGS_isymbols.empty() && !FLAGS_numeric) {
77    isyms = SymbolTable::ReadText(FLAGS_isymbols, opts);
78    if (!isyms) exit(1);
79  }
80
81  if (!FLAGS_osymbols.empty() && !FLAGS_numeric) {
82    osyms = SymbolTable::ReadText(FLAGS_osymbols, opts);
83    if (!osyms) exit(1);
84  }
85
86  if (!FLAGS_ssymbols.empty() && !FLAGS_numeric) {
87    ssyms = SymbolTable::ReadText(FLAGS_ssymbols);
88    if (!ssyms) exit(1);
89  }
90
91  if (!isyms && !FLAGS_numeric)
92    isyms = fst->InputSymbols();
93  if (!osyms && !FLAGS_numeric)
94    osyms = fst->OutputSymbols();
95
96  s::PrintFst(*fst, *ostrm, dest, isyms, osyms, ssyms,
97              FLAGS_acceptor, FLAGS_show_weight_one);
98
99  if (isyms && !FLAGS_save_isymbols.empty())
100    isyms->WriteText(FLAGS_save_isymbols);
101
102  if (osyms && !FLAGS_save_osymbols.empty())
103    osyms->WriteText(FLAGS_save_osymbols);
104
105  if (ostrm != &cout)
106    delete ostrm;
107  return 0;
108}
109