LogTools.h

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#ifndef ZYPP_BASE_LOGTOOLS_H
#define ZYPP_BASE_LOGTOOLS_H

#include <iostream>
#include <string>
#include <vector>
#include <list>
#include <set>
#include <map>

#include "zypp/base/Tr1hash.h"
#include "zypp/base/Logger.h"
#include "zypp/base/Iterator.h"
#include "zypp/base/Deprecated.h"

namespace zypp
{ 
  
  using std::endl;

  template<class _Iterator>
    std::ostream & dumpRange( std::ostream & str,
                              _Iterator begin, _Iterator end,
                              const std::string & intro = "{",
                              const std::string & pfx   = "\n  ",
                              const std::string & sep   = "\n  ",
                              const std::string & sfx   = "\n",
                              const std::string & extro = "}" )
    {
      str << intro;
      if ( begin != end )
        {
          str << pfx << *begin;
          for (  ++begin; begin != end; ++begin )
            str << sep << *begin;
          str << sfx;
        }
      return str << extro;
    }

  template<class _Iterator>
    std::ostream & dumpRangeLine( std::ostream & str,
                                  _Iterator begin, _Iterator end )
    { return dumpRange( str, begin, end, "(", "", ", ", "", ")" ); }


  template<class _Tp>
    std::ostream & operator<<( std::ostream & str, const std::vector<_Tp> & obj )
    { return dumpRange( str, obj.begin(), obj.end() ); }

  template<class _Tp>
    std::ostream & operator<<( std::ostream & str, const std::set<_Tp> & obj )
    { return dumpRange( str, obj.begin(), obj.end() ); }

  template<class _Tp>
    std::ostream & operator<<( std::ostream & str, const std::tr1::unordered_set<_Tp> & obj )
    { return dumpRange( str, obj.begin(), obj.end() ); }

  template<class _Tp>
    std::ostream & operator<<( std::ostream & str, const std::list<_Tp> & obj )
    { return dumpRange( str, obj.begin(), obj.end() ); }

  namespace _logtoolsdetail
  { 

    // mapEntry

    template<class _Pair>
      class MapEntry
      {
      public:
        MapEntry( const _Pair & pair_r )
        : _pair( &pair_r )
        {}

        const _Pair & pair() const
        { return *_pair; }

      private:
        const _Pair *const _pair;
      };

    template<class _Pair>
      std::ostream & operator<<( std::ostream & str, const MapEntry<_Pair> & obj )
      {
        return str << '[' << obj.pair().first << "] = " << obj.pair().second;
      }

    template<class _Pair>
      MapEntry<_Pair> mapEntry( const _Pair & pair_r )
      { return MapEntry<_Pair>( pair_r ); }

    // dumpMap

    template<class _Map>
      class DumpMap
      {
      public:
        typedef _Map                        MapType;
        typedef typename _Map::value_type   PairType;
        typedef MapEntry<PairType>          MapEntryType;

        struct Transformer : public std::unary_function<PairType, MapEntryType>
        {
          MapEntryType operator()( const PairType & pair_r ) const
          { return mapEntry( pair_r ); }
        };

        typedef transform_iterator<Transformer, typename MapType::const_iterator>
                MapEntry_const_iterator;

      public:
        DumpMap( const _Map & map_r )
        : _map( &map_r )
        {}

        const _Map & map() const
        { return *_map; }

        MapEntry_const_iterator begin() const
        { return make_transform_iterator( map().begin(), Transformer() ); }

        MapEntry_const_iterator end() const
        { return make_transform_iterator( map().end(), Transformer() );}

      private:
        const _Map *const _map;
      };

    template<class _Map>
      std::ostream & operator<<( std::ostream & str, const DumpMap<_Map> & obj )
      { return dumpRange( str, obj.begin(), obj.end() ); }

    template<class _Map>
      DumpMap<_Map> dumpMap( const _Map & map_r )
      { return DumpMap<_Map>( map_r ); }

    // dumpKeys

    template<class _Map>
      class DumpKeys
      {
      public:
        typedef typename MapKVIteratorTraits<_Map>::Key_const_iterator MapKey_const_iterator;

      public:
        DumpKeys( const _Map & map_r )
        : _map( &map_r )
        {}

        const _Map & map() const
        { return *_map; }

        MapKey_const_iterator begin() const
        { return make_map_key_begin( map() ); }

        MapKey_const_iterator end() const
        { return make_map_key_end( map() ); }

      private:
        const _Map *const _map;
      };

    template<class _Map>
      std::ostream & operator<<( std::ostream & str, const DumpKeys<_Map> & obj )
      { return dumpRange( str, obj.begin(), obj.end() ); }

    template<class _Map>
      DumpKeys<_Map> dumpKeys( const _Map & map_r )
      { return DumpKeys<_Map>( map_r ); }

    // dumpValues

    template<class _Map>
      class DumpValues
      {
      public:
        typedef typename MapKVIteratorTraits<_Map>::Value_const_iterator MapValue_const_iterator;

      public:
        DumpValues( const _Map & map_r )
        : _map( &map_r )
        {}

        const _Map & map() const
        { return *_map; }

        MapValue_const_iterator begin() const
        { return make_map_value_begin( map() ); }

        MapValue_const_iterator end() const
        { return make_map_value_end( map() ); }

      private:
        const _Map *const _map;
      };

    template<class _Map>
      std::ostream & operator<<( std::ostream & str, const DumpValues<_Map> & obj )
      { return dumpRange( str, obj.begin(), obj.end() ); }

    template<class _Map>
      DumpValues<_Map> dumpValues( const _Map & map_r )
      { return DumpValues<_Map>( map_r ); }

  } // namespace _logtoolsdetail

  // iomanipulator
  using _logtoolsdetail::mapEntry;   // std::pair as '[key] = value'
  using _logtoolsdetail::dumpMap;    // dumpRange '[key] = value'
  using _logtoolsdetail::dumpKeys;   // dumpRange keys
  using _logtoolsdetail::dumpValues; // dumpRange values

  template<class _Key, class _Tp>
    std::ostream & operator<<( std::ostream & str, const std::map<_Key, _Tp> & obj )
    { return str << dumpMap( obj ); }

  template<class _Key, class _Tp>
    std::ostream & operator<<( std::ostream & str, const std::tr1::unordered_map<_Key, _Tp> & obj )
    { return str << dumpMap( obj ); }

  inline std::ostream & operator<<( std::ostream & str, const std::basic_ios<char> & obj )
  {
    std::string ret( "[" );
    ret += ( obj.good() ? 'g' : '_' );
    ret += ( obj.eof()  ? 'e' : '_' );
    ret += ( obj.fail() ? 'F' : '_' );
    ret += ( obj.bad()  ? 'B' : '_' );
    ret += "]";
    return str << ret;
  }

  // iomanipulator: str << dump(val) << ...
  // calls:         std::ostream & dumpOn( std::ostream & str, const Type & obj )

  namespace detail
  {
    template<class _Tp>
    struct Dump
    {
      Dump( const _Tp & obj_r ) : _obj( obj_r ) {}
      const _Tp & _obj;
    };

    template<class _Tp>
    std::ostream & operator<<( std::ostream & str, const Dump<_Tp> & obj )
    { return dumpOn( str, obj._obj ); }
  }

  template<class _Tp>
  detail::Dump<_Tp> dump( const _Tp & obj_r )
  { return detail::Dump<_Tp>(obj_r); }


} // namespace zypp
#endif // ZYPP_BASE_LOGTOOLS_H