libstdc++-v3/testsuite/util/io/text_populate.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005-2025 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the terms
   7 // of the GNU General Public License as published by the Free Software
   8 // Foundation; either version 3, or (at your option) any later
   9 // version.
  10
  11 // This library is distributed in the hope that it will be useful, but
  12 // WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 // General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20
  21 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  22
  23 // Permission to use, copy, modify, sell, and distribute this software
  24 // is hereby granted without fee, provided that the above copyright
  25 // notice appears in all copies, and that both that copyright notice
  26 // and this permission notice appear in supporting documentation. None
  27 // of the above authors, nor IBM Haifa Research Laboratories, make any
  28 // representation about the suitability of this software for any
  29 // purpose. It is provided "as is" without express or implied
  30 // warranty.
  31
  32 /**
  33  * @file text_populate.hpp
  34  * Contains a function for populating a vector with text words from
  35  *    a file.
  36  */
  37
  38 #ifndef PB_DS_TEXT_POPULATE_HPP
  39 #define PB_DS_TEXT_POPULATE_HPP
  40
  41 #include <io/illegal_input_error.hpp>
  42 #include <set>
  43 #include <fstream>
  44 #include <string>
  45 #include <iostream>
  46
  47 namespace __gnu_pbds
  48 {
  49
  50   namespace test
  51   {
  52
  53     template<typename Vec>
  54     void
  55     text_populate(const std::string& r_f_name, Vec& r_a_txt)
  56     {
  57       const size_t size = r_a_txt.size();
  58
  59       try
  60         {
  61           std::ifstream f(r_f_name.c_str());
  62
  63           if (!f.good())
  64             {
  65               std::cerr << "Cannot open file " << r_f_name.c_str() <<
  66                 std::endl;
  67
  68               throw __gnu_pbds::test::illegal_input_error();
  69             }
  70
  71           size_t i = 0;
  72
  73           while (f.good()&&  i < size)
  74             {
  75               f >> r_a_txt[i].first;
  76               r_a_txt[i].second = 0;
  77
  78               ++i;
  79             }
  80
  81           if (i < size)
  82             {
  83               std::cerr << "Read only " << static_cast<unsigned long>(i) <<
  84                 " words" << std::endl;
  85
  86               throw __gnu_pbds::test::illegal_input_error();
  87             }
  88         }
  89       catch(...)
  90         {
  91           std::cerr << "Error reading from file" << std::endl;
  92
  93           throw;
  94         }
  95     }
  96
  97     template<typename Vec>
  98     void
  99     distinct_text_populate(const std::string& r_f_name, Vec& r_a_txt)
 100     {
 101       const size_t size = r_a_txt.size();
 102
 103       try
 104         {
 105           std::ifstream f(r_f_name.c_str());
 106
 107           if (!f.good())
 108             {
 109               std::cerr << "Cannot open file " << r_f_name.c_str() <<
 110                 std::endl;
 111
 112               throw __gnu_pbds::test::illegal_input_error();
 113             }
 114
 115           typedef std::set< typename Vec::value_type::first_type> set_t;
 116
 117           set_t s;
 118
 119           while (f.good()&&  s.size() < size)
 120             {
 121               typename Vec::value_type::first_type v;
 122
 123               f >> v;
 124
 125               if (s.find(v) == s.end())
 126                 {
 127                   r_a_txt[s.size()] = std::make_pair(v, 0);
 128
 129                   s.insert(v);
 130                 }
 131             }
 132
 133           if (s.size() < size)
 134             {
 135               std::cerr << "Read only " << static_cast<unsigned long>(s.size()) <<
 136                 " words" << std::endl;
 137
 138               throw __gnu_pbds::test::illegal_input_error();
 139             }
 140         }
 141       catch(...)
 142         {
 143           std::cerr << "Error reading from file" << std::endl;
 144
 145           throw;
 146         }
 147     }
 148
 149   } // namespace test
 150
 151 } // namespace __gnu_pbds
 152
 153 #endif // #ifndef PB_DS_TEXT_POPULATE_HPP