Algorithm.h

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#ifndef ZYPP_BASE_ALGORITHM_H
#define ZYPP_BASE_ALGORITHM_H

#include <algorithm>

namespace zypp
{ 

  template <class _Iterator, class _Filter, class _Function>
    inline int invokeOnEach( _Iterator begin_r, _Iterator end_r,
                             _Filter filter_r,
                             _Function fnc_r )
    {
      int cnt = 0;
      for ( _Iterator it = begin_r; it != end_r; ++it )
        {
          if ( filter_r( *it ) )
            {
              ++cnt;
              if ( ! fnc_r( *it ) )
                  return -cnt;
            }
        }
      return cnt;
    }

  template <class _Iterator, class _Function>
    inline int invokeOnEach( _Iterator begin_r, _Iterator end_r,
                             _Function fnc_r )
    {
      int cnt = 0;
      for ( _Iterator it = begin_r; it != end_r; ++it )
        {
          ++cnt;
          if ( ! fnc_r( *it ) )
            return -cnt;
        }
      return cnt;
    }

} // namespace zypp
#endif // ZYPP_BASE_ALGORITHM_H

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