RootCompressionSettings.cpp

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// STD
#include <stdexcept>
    
// local
#include "RootCompressionSettings.h"

// ROOT
#include "Compression.h"

// boost
#include "boost/lexical_cast.hpp"

//-----------------------------------------------------------------------------
// Implementation file for class : RootCompressionSettings
//
// 2013-10-24 : Chris Jones
//-----------------------------------------------------------------------------

//=============================================================================
// Standard constructor, initializes variables
//=============================================================================
RootHistCnv::RootCompressionSettings::
RootCompressionSettings( const std::string & settings ) 
  : m_compSettings ( settings ),
    m_level ( ROOT::CompressionSettings(ROOT::kZLIB,1) )
{

  const std::string::size_type idx = m_compSettings.find(':');
  if ( idx != std::string::npos )
  {
    // Get compression algorithm type
    const std::string alg = m_compSettings.substr(0,idx);
    ROOT::ECompressionAlgorithm alg_code = ROOT::kUseGlobalSetting;
    if      ( alg == "ZLIB" ) { alg_code = ROOT::kZLIB; }
    else if ( alg == "LZMA" ) { alg_code = ROOT::kLZMA; }
    else
    {
      throw std::runtime_error("ERROR: Unknown ROOT compression algorithm:"+alg);
    }

    // get compression level
    const std::string slev = m_compSettings.substr(idx+1);
    const int         ilev = boost::lexical_cast<int>(slev);
    
    // set the level
    m_level = ROOT::CompressionSettings(alg_code,ilev);
  }

}

//=============================================================================