| // extract-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: riley@google.com (Michael Riley) |
| // Modified: jpr@google.com (Jake Ratkiewicz) to use the new arc-dispatch |
| |
| // \file |
| // Extracts component FSTs from an finite-state archive. |
| // |
| |
| #ifndef FST_EXTENSIONS_FAR_EXTRACT_H__ |
| #define FST_EXTENSIONS_FAR_EXTRACT_H__ |
| |
| #include <string> |
| #include <vector> |
| using std::vector; |
| |
| #include <fst/extensions/far/far.h> |
| |
| namespace fst { |
| |
| template<class Arc> |
| void FarExtract(const vector<string> &ifilenames, |
| const int32 &generate_filenames, |
| const string &begin_key, |
| const string &end_key, |
| const string &filename_prefix, |
| const string &filename_suffix) { |
| 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; |
| const Fst<Arc> &fst = far_reader->GetFst(); |
| |
| if (key == okey) |
| ++nrep; |
| else |
| nrep = 0; |
| |
| okey = key; |
| |
| string ofilename; |
| if (generate_filenames) { |
| ostringstream tmp; |
| tmp.width(generate_filenames); |
| tmp.fill('0'); |
| tmp << i; |
| ofilename = tmp.str(); |
| } else { |
| if (nrep > 0) { |
| ostringstream tmp; |
| tmp << '.' << nrep; |
| key += tmp.str(); |
| } |
| ofilename = key; |
| } |
| fst.Write(filename_prefix + ofilename + filename_suffix); |
| } |
| |
| return; |
| } |
| |
| } // namespace fst |
| |
| #endif // FST_EXTENSIONS_FAR_EXTRACT_H__ |