HbookName.h

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#ifndef GAUDIALG_HBOOKNAME_H
#define GAUDIALG_HBOOKNAME_H 1
// Include files
#include <string>
#include <algorithm>

namespace
{
  inline std::string dirHbookName
  ( const std::string& addr        ,
    const int          maxLen = 16 )
  {
    // ignore empty locations
    if( addr.empty() ) { return std::string(); }
    //
    std::string old( addr );
    // remove long names
    if( 0 < maxLen &&  maxLen < (int) old.size() )
    {
      auto p1 = old.begin();
      const char sep('/');
      while( old.end() != p1 )
      {
        p1 =
          std::find_if( p1        ,
                        old.end() ,
                        [&](const char& c) { return c!=sep; } );
        auto p2 = std::find( p1 , old.end() , sep ) ;
        if( ( p2 - p1 ) <= (int) maxLen  ) { p1 = p2 ; continue ; }
        old.insert( p1 + maxLen , sep ) ;
        p1 = old.begin() ;
      }
    }
    return old;
  }

} // end of anonymous namespace

// ============================================================================
// The END
// ============================================================================
#endif // GAUDIALG_HBOOKNAME_H
// ============================================================================