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// printstrings-main.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: allauzen@google.com (Cyril Allauzen)
// Modified by: jpr@google.com (Jake Ratkiewicz)
//
// \file
// Output as strings the string FSTs in a finite-state archive.
#ifndef FST_EXTENSIONS_FAR_PRINT_STRINGS_H__
#define FST_EXTENSIONS_FAR_PRINT_STRINGS_H__
#include <string>
#include <vector>
using std::vector;
#include <fst/extensions/far/far.h>
#include <fst/shortest-distance.h>
#include <fst/string.h>
DECLARE_string(far_field_separator);
namespace fst {
template <class Arc>
void FarPrintStrings(
const vector<string> &ifilenames, const FarEntryType entry_type,
const FarTokenType far_token_type, const string &begin_key,
const string &end_key, const bool print_key, const bool print_weight,
const string &symbols_fname, const bool initial_symbols,
const int32 generate_filenames,
const string &filename_prefix, const string &filename_suffix) {
typename StringPrinter<Arc>::TokenType token_type;
if (far_token_type == FTT_SYMBOL) {
token_type = StringPrinter<Arc>::SYMBOL;
} else if (far_token_type == FTT_BYTE) {
token_type = StringPrinter<Arc>::BYTE;
} else if (far_token_type == FTT_UTF8) {
token_type = StringPrinter<Arc>::UTF8;
} else {
FSTERROR() << "FarPrintStrings: unknown token type";
return;
}
const SymbolTable *syms = 0;
if (!symbols_fname.empty()) {
// allow negative flag?
SymbolTableTextOptions opts;
opts.allow_negative = true;
syms = SymbolTable::ReadText(symbols_fname, opts);
if (!syms) {
FSTERROR() << "FarPrintStrings: error reading symbol table: "
<< symbols_fname;
return;
}
}
FarReader<Arc> *far_reader = FarReader<Arc>::Open(ifilenames);
if (!far_reader) return;
if (!begin_key.empty())
far_reader->Find(begin_key);
string okey;
int nrep = 0;
for (int i = 1; !far_reader->Done(); far_reader->Next(), ++i) {
string key = far_reader->GetKey();
if (!end_key.empty() && end_key < key)
break;
if (okey == key)
++nrep;
else
nrep = 0;
okey = key;
const Fst<Arc> &fst = far_reader->GetFst();
if (i == 1 && initial_symbols && syms == 0 && fst.InputSymbols() != 0)
syms = fst.InputSymbols()->Copy();
string str;
VLOG(2) << "Handling key: " << key;
StringPrinter<Arc> string_printer(
token_type, syms ? syms : fst.InputSymbols());
string_printer(fst, &str);
if (entry_type == FET_LINE) {
if (print_key)
cout << key << FLAGS_far_field_separator[0];
cout << str;
if (print_weight)
cout << FLAGS_far_field_separator[0] << ShortestDistance(fst);
cout << endl;
} else if (entry_type == FET_FILE) {
stringstream sstrm;
if (generate_filenames) {
sstrm.fill('0');
sstrm << std::right << setw(generate_filenames) << i;
} else {
sstrm << key;
if (nrep > 0)
sstrm << "." << nrep;
}
string filename;
filename = filename_prefix + sstrm.str() + filename_suffix;
ofstream ostrm(filename.c_str());
if (!ostrm) {
FSTERROR() << "FarPrintStrings: Can't open file:" << filename;
delete syms;
delete far_reader;
return;
}
ostrm << str;
if (token_type == StringPrinter<Arc>::SYMBOL)
ostrm << "\n";
}
}
delete syms;
}
} // namespace fst
#endif // FST_EXTENSIONS_FAR_PRINT_STRINGS_H__
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