RootHistCnv::RootCompressionSettings Class Reference

#include </builds/gaudi/Gaudi/RootHistCnv/src/RootCompressionSettings.h>

Public Member Functions
	RootCompressionSettings (const std::string &settings)
	Standard constructor. More...
int	level () const
	Get the level. More...

Private Attributes
int	m_level
	The cached ROOT compression level int. More...

Detailed Description

Simple class to decode a ROOT compression settings string, of the form '<Alg>:<level>' into the integer code to pass to ROOT.

Author

Chris Jones

Date

2013-10-24

Definition at line 28 of file RootCompressionSettings.h.

Constructor & Destructor Documentation

RootCompressionSettings()

RootHistCnv::RootCompressionSettings::RootCompressionSettings

(

const std::string &

settings

)

Standard constructor.

Definition at line 29 of file RootCompressionSettings.cpp.

    : m_level( ROOT::CompressionSettings( ROOT::RCompressionSetting::EAlgorithm::kZLIB, 1 ) ) {
  const std::string::size_type idx = settings.find( ':' );
  if ( idx != std::string::npos ) {
    // Get compression algorithm type
    const std::string                              alg      = settings.substr( 0, idx );
    ROOT::RCompressionSetting::EAlgorithm::EValues alg_code = ROOT::RCompressionSetting::EAlgorithm::kUseGlobal;
    if ( alg == "ZLIB" ) {
      alg_code = ROOT::RCompressionSetting::EAlgorithm::kZLIB;
    } else if ( alg == "LZMA" ) {
      alg_code = ROOT::RCompressionSetting::EAlgorithm::kLZMA;
    } else if ( alg == "LZ4" ) {
      alg_code = ROOT::RCompressionSetting::EAlgorithm::kLZ4;
#if ROOT_VERSION_CODE >= ROOT_VERSION( 6, 20, 0 )
    } else if ( alg == "ZSTD" ) {
      alg_code = ROOT::RCompressionSetting::EAlgorithm::kZSTD;
#endif
    } else {
      throw std::runtime_error( "ERROR: Unknown ROOT compression algorithm:" + alg );
    }
 
    // get compression level
    const std::string slev = settings.substr( idx + 1 );
    const int         ilev = std::stoi( slev );
 
    // set the level
    m_level = ROOT::CompressionSettings( alg_code, ilev );
  }
}

Member Function Documentation

level()

int RootHistCnv::RootCompressionSettings::level ( ) const

inline

Get the level.

Definition at line 37 of file RootCompressionSettings.h.

{ return m_level; }

Member Data Documentation

m_level

int RootHistCnv::RootCompressionSettings::m_level

private

The cached ROOT compression level int.

Definition at line 30 of file RootCompressionSettings.h.

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The documentation for this class was generated from the following files:

• RootHistCnv/src/RootCompressionSettings.h
• RootHistCnv/src/RootCompressionSettings.cpp