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

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006 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 2, 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 COPYING.  If not, write to
  18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  19 // MA 02111-1307, USA.
  20
  21 // As a special exception, you may use this file as part of a free
  22 // software library without restriction.  Specifically, if other files
  23 // instantiate templates or use macros or inline functions from this
  24 // file, or you compile this file and link it with other files to
  25 // produce an executable, this file does not by itself cause the
  26 // resulting executable to be covered by the GNU General Public
  27 // License.  This exception does not however invalidate any other
  28 // reasons why the executable file might be covered by the GNU General
  29 // Public License.
  30
  31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  32
  33 // Permission to use, copy, modify, sell, and distribute this software
  34 // is hereby granted without fee, provided that the above copyright
  35 // notice appears in all copies, and that both that copyright notice
  36 // and this permission notice appear in supporting documentation. None
  37 // of the above authors, nor IBM Haifa Research Laboratories, make any
  38 // representation about the suitability of this software for any
  39 // purpose. It is provided "as is" without express or implied
  40 // warranty.
  41
  42 /**
  43  * @file text_populate.hpp
  44  * Contains a function for populating a vector with text words from
  45  *    a file.
  46  */
  47
  48 #ifndef PB_DS_TEXT_POPULATE_HPP
  49 #define PB_DS_TEXT_POPULATE_HPP
  50
  51 #include <io/illegal_input_error.hpp>
  52 #include <set>
  53 #include <fstream>
  54 #include <string>
  55 #include <iostream>
  56
  57 namespace pb_ds
  58 {
  59
  60   namespace test
  61   {
  62
  63     template<typename Vec>
  64     void
  65     text_populate(const std::string& r_f_name, Vec& r_a_txt)
  66     {
  67       const size_t size = r_a_txt.size();
  68
  69       try
  70         {
  71           std::ifstream f(r_f_name.c_str());
  72
  73           if (!f.good())
  74             {
  75               std::cerr << "Cannot open file " << r_f_name.c_str() <<
  76                 std::endl;
  77
  78               throw pb_ds::test::illegal_input_error();
  79             }
  80
  81           size_t i = 0;
  82
  83           while (f.good()&&  i < size)
  84             {
  85               f >> r_a_txt[i].first;
  86               r_a_txt[i].second = 0;
  87
  88               ++i;
  89             }
  90
  91           if (i < size)
  92             {
  93               std::cerr << "Read only " << static_cast<unsigned long>(i) <<
  94                 " words" << std::endl;
  95
  96               throw pb_ds::test::illegal_input_error();
  97             }
  98         }
  99       catch(...)
 100         {
 101           std::cerr << "Error reading from file" << std::endl;
 102
 103           throw;
 104         }
 105     }
 106
 107     template<typename Vec>
 108     void
 109     distinct_text_populate(const std::string& r_f_name, Vec& r_a_txt)
 110     {
 111       const size_t size = r_a_txt.size();
 112
 113       try
 114         {
 115           std::ifstream f(r_f_name.c_str());
 116
 117           if (!f.good())
 118             {
 119               std::cerr << "Cannot open file " << r_f_name.c_str() <<
 120                 std::endl;
 121
 122               throw pb_ds::test::illegal_input_error();
 123             }
 124
 125           typedef std::set< typename Vec::value_type::first_type> set_t;
 126
 127           set_t s;
 128
 129           while (f.good()&&  s.size() < size)
 130             {
 131               typename Vec::value_type::first_type v;
 132
 133               f >> v;
 134
 135               if (s.find(v) == s.end())
 136                 {
 137                   r_a_txt[s.size()] = std::make_pair(v, 0);
 138
 139                   s.insert(v);
 140                 }
 141             }
 142
 143           if (s.size() < size)
 144             {
 145               std::cerr << "Read only " << static_cast<unsigned long>(s.size()) <<
 146                 " words" << std::endl;
 147
 148               throw pb_ds::test::illegal_input_error();
 149             }
 150         }
 151       catch(...)
 152         {
 153           std::cerr << "Error reading from file" << std::endl;
 154
 155           throw;
 156         }
 157     }
 158
 159   } // namespace test
 160
 161 } // namespace pb_ds
 162
 163 #endif // #ifndef PB_DS_TEXT_POPULATE_HPP