libzypp  17.16.0
PoolQueryUtil.tcc
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1 /*---------------------------------------------------------------------\
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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