zypp/PoolQueryUtil.tcc

   1 /*---------------------------------------------------------------------\
   2 |                          ____ _   __ __ ___                          |
   3 |                         |__  / \ / / . \ . \                         |
   4 |                           / / \ V /|  _/  _/                         |
   5 |                          / /__ | | | | | |                           |
   6 |                         /_____||_| |_| |_|                           |
   7 |                                                                      |
   8 \---------------------------------------------------------------------*/
   9 /** \file zypp/PoolQueryUtil.tcc
  10  *
  11  * including fstream is not hell here because this header only included
  12  * by implementation file, header doesn't need include it.
  13 */
  14 #ifndef ZYPP_POOLQUERYUTIL_TCC
  15 #define ZYPP_POOLQUERYUTIL_TCC
  16
  17 #include <fstream>
  18
  19 #include "zypp/Pathname.h"
  20 #include "zypp/PoolQuery.h"
  21 #include "zypp/base/String.h"
  22
  23 namespace zypp
  24 {
  25
  26   /**
  27    * sends to output iterator all queries readed from file.
  28    *
  29    * \code
  30    *  list<PoolQuery> s;
  31    *  insert_iterator<list<PoolQuery> > ii(s, s.end());
  32    *  readPoolQueriesFromStream(f,ii);
  33    * \endcode
  34    */
  35   template <class OutputIterator>
  36   void readPoolQueriesFromFile(const zypp::filesystem::Pathname &file,
  37       OutputIterator out )
  38   {
  39     bool found;
  40     std::ifstream fin( file.c_str() );
  41
  42     if (!fin)
  43       ZYPP_THROW(Exception(str::form("Cannot open file %s",file.c_str())));
  44
  45     do
  46     {
  47       zypp::PoolQuery q;
  48       found = q.recover( fin );
  49       if (found)
  50         *out++ = q;
  51     } while ( found );
  52
  53     fin.close();
  54   }
  55
  56   /**
  57    * Writes all queries from begin to end.
  58    */
  59
  60   template <class InputIterator>
  61   void writePoolQueriesToFile(const zypp::filesystem::Pathname &file,
  62       InputIterator begin, InputIterator end )
  63   {
  64     std::ofstream fout( file.c_str(), std::ios_base::out | std::ios_base::trunc );
  65
  66     if (!fout)
  67       ZYPP_THROW(Exception(str::form("Cannot open file %s",file.c_str())));
  68
  69     for_( it, begin, end )
  70     {
  71       it->serialize( fout );
  72     }
  73
  74     fout.close();
  75   }
  76
  77 }
  78 #endif // ZYPP_POOLQUERYUTIL_H