include/GaudiAlg/HbookName.h

0001 /***********************************************************************************\
0002 * (c) Copyright 1998-2019 CERN for the benefit of the LHCb and ATLAS collaborations *
0003 *                                                                                   *
0004 * This software is distributed under the terms of the Apache version 2 licence,     *
0005 * copied verbatim in the file "LICENSE".                                            *
0006 *                                                                                   *
0007 * In applying this licence, CERN does not waive the privileges and immunities       *
0008 * granted to it by virtue of its status as an Intergovernmental Organization        *
0009 * or submit itself to any jurisdiction.                                             *
0010 \***********************************************************************************/
0011 #ifndef GAUDIALG_HBOOKNAME_H
0012 #define GAUDIALG_HBOOKNAME_H 1
0013 // Include files
0014 #include <algorithm>
0015 #include <string>
0016
0017 /** @file
0018  *  few useful function to construct names of Hbook histograms
0019  *  and directories
0020  *  functions are imported from
0021  *  Tools/LoKi and Calo/CaloUtils packages
0022  *  @author Vanya BELYAEV Ivan.Belyaev@itep.ru
0023  *  @date   2002-07-25
0024  */
0025
0026 namespace {
0027   /** Simple function to convert any valid Gaudi address
0028    *  (name in Transient Store)
0029    *  to address, which is simultaneously valid for Hbook directory
0030    *
0031    *    examples:
0032    *   "verylongname"  -->  "verylong/name"
0033    *
0034    *  @param   old    old address
0035    *  @param   maxLen maximum allowed length of directory name (16 for Hbook)
0036    *  @return  new  address
0037    *
0038    *  @author Vanya BELYAEV Ivan.Belyaev@itep.ru
0039    *  @date   06/07/2001
0040    */
0041   inline std::string dirHbookName( const std::string& addr, const int maxLen = 16 ) {
0042     // ignore empty locations
0043     if ( addr.empty() ) { return std::string(); }
0044     //
0045     std::string old( addr );
0046     // remove long names
0047     if ( 0 < maxLen && maxLen < (int)old.size() ) {
0048       auto       p1 = old.begin();
0049       const char sep( '/' );
0050       while ( old.end() != p1 ) {
0051         p1      = std::find_if( p1, old.end(), [&]( const char& c ) { return c != sep; } );
0052         auto p2 = std::find( p1, old.end(), sep );
0053         if ( ( p2 - p1 ) <= (int)maxLen ) {
0054           p1 = p2;
0055           continue;
0056         }
0057         old.insert( p1 + maxLen, sep );
0058         p1 = old.begin();
0059       }
0060     }
0061     ///
0062     return old;
0063   }
0064
0065 } // end of anonymous namespace
0066
0067 // ============================================================================
0068 // The END
0069 // ============================================================================
0070 #endif // GAUDIALG_HBOOKNAME_H