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      1 
      2 // Licensed under the Apache License, Version 2.0 (the "License");
      3 // you may not use this file except in compliance with the License.
      4 // You may obtain a copy of the License at
      5 //
      6 //     http://www.apache.org/licenses/LICENSE-2.0
      7 //
      8 // Unless required by applicable law or agreed to in writing, software
      9 // distributed under the License is distributed on an "AS IS" BASIS,
     10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     11 // See the License for the specific language governing permissions and
     12 // limitations under the License.
     13 //
     14 // Copyright 2005-2010 Google, Inc.
     15 // Author: jpr (at) google.com (Jake Ratkiewicz)
     16 
     17 #include <fst/script/text-io.h>
     18 
     19 #include <cstring>
     20 #include <sstream>
     21 #include <utility>
     22 using std::pair; using std::make_pair;
     23 
     24 #include <fst/types.h>
     25 #include <fst/util.h>
     26 
     27 namespace fst {
     28 namespace script {
     29 
     30 // Reads vector of weights; returns true on success.
     31 bool ReadPotentials(const string &weight_type,
     32                     const string& filename,
     33                     vector<WeightClass>* potential) {
     34   ifstream strm(filename.c_str());
     35   if (!strm) {
     36     LOG(ERROR) << "ReadPotentials: Can't open file: " << filename;
     37     return false;
     38   }
     39 
     40   const int kLineLen = 8096;
     41   char line[kLineLen];
     42   size_t nline = 0;
     43 
     44   potential->clear();
     45   while (strm.getline(line, kLineLen)) {
     46     ++nline;
     47     vector<char *> col;
     48     SplitToVector(line, "\n\t ", &col, true);
     49     if (col.size() == 0 || col[0][0] == '\0')  // empty line
     50       continue;
     51     if (col.size() != 2) {
     52       LOG(ERROR) << "ReadPotentials: Bad number of columns, "
     53                  << "file = " << filename << ", line = " << nline;
     54       return false;
     55     }
     56 
     57     ssize_t s = StrToInt64(col[0], filename, nline, false);
     58     WeightClass weight(weight_type, col[1]);
     59 
     60     while (potential->size() <= s)
     61       potential->push_back(WeightClass::Zero());
     62     (*potential)[s] = weight;
     63   }
     64   return true;
     65 }
     66 
     67 // Writes vector of weights; returns true on success.
     68 bool WritePotentials(const string& filename,
     69                      const vector<WeightClass>& potential) {
     70   ostream *strm = &std::cout;
     71   if (!filename.empty()) {
     72     strm = new ofstream(filename.c_str());
     73     if (!*strm) {
     74       LOG(ERROR) << "WritePotentials: Can't open file: " << filename;
     75       delete strm;
     76       return false;
     77     }
     78   }
     79 
     80   strm->precision(9);
     81   for (ssize_t s = 0; s < potential.size(); ++s)
     82     *strm << s << "\t" << potential[s] << "\n";
     83 
     84   if (!*strm)
     85     LOG(ERROR) << "WritePotentials: Write failed: "
     86                << (filename.empty() ? "standard output" : filename);
     87   bool ret = *strm;
     88   if (strm != &std::cout)
     89     delete strm;
     90   return ret;
     91 }
     92 
     93 
     94 }  // namespace script
     95 }  // namespace fst
     96