Logger.h

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/*---------------------------------------------------------------------\
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|                         /_____||_| |_| |_|                           |
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\---------------------------------------------------------------------*/
#ifndef ZYPP_BASE_LOGGER_H
#define ZYPP_BASE_LOGGER_H
#include <cstring>
#include <iosfwd>
#include <string>
 
#ifndef ZYPP_NDEBUG
namespace zypp
{
  namespace debug
  { // impl in LogControl.cc
 
    // Log code loacaton and block leave
    // Indent if nested
    struct TraceLeave
    {
      TraceLeave( const TraceLeave & ) =delete;
      TraceLeave & operator=( const TraceLeave & ) =delete;
      TraceLeave( const char * file_r, const char * fnc_r, int line_r );
      ~TraceLeave();
    private:
      static unsigned _depth;
      const char *    _file;
      const char *    _fnc;
      int             _line;
    };
#define TRACE ::zypp::debug::TraceLeave _TraceLeave( __FILE__, __FUNCTION__, __LINE__ )
 
    // OnScreenDebug messages colored to stderr
    struct Osd
    {
      Osd( std::ostream &, int = 0 );
      ~Osd();
 
      template<class Tp>
      Osd & operator<<( Tp && val )
      {
        _strout << std::forward<Tp>(val);
        _strlog << std::forward<Tp>(val);
        return *this;
      }
 
      Osd & operator<<( std::ostream& (*iomanip)( std::ostream& ) );
 
    private:
      std::ostream & _strout;
      std::ostream & _strlog;
    };
#define OSD ::zypp::debug::Osd(L_USR("OSD"))
  }
}
#endif // ZYPP_NDEBUG
 
 
#ifndef ZYPP_BASE_LOGGER_LOGGROUP
#define ZYPP_BASE_LOGGER_LOGGROUP "DEFINE_LOGGROUP"
#endif
 
#define XXX L_XXX( ZYPP_BASE_LOGGER_LOGGROUP )
#define DBG L_DBG( ZYPP_BASE_LOGGER_LOGGROUP )
#define MIL L_MIL( ZYPP_BASE_LOGGER_LOGGROUP )
#define WAR L_WAR( ZYPP_BASE_LOGGER_LOGGROUP )
#define ERR L_ERR( ZYPP_BASE_LOGGER_LOGGROUP )
#define SEC L_SEC( ZYPP_BASE_LOGGER_LOGGROUP )
#define INT L_INT( ZYPP_BASE_LOGGER_LOGGROUP )
#define USR L_USR( ZYPP_BASE_LOGGER_LOGGROUP )
 
#define L_XXX(GROUP) ZYPP_BASE_LOGGER_LOG( GROUP, zypp::base::logger::E_XXX )
#define L_DBG(GROUP) ZYPP_BASE_LOGGER_LOG( GROUP"++", zypp::base::logger::E_MIL )
#define L_MIL(GROUP) ZYPP_BASE_LOGGER_LOG( GROUP, zypp::base::logger::E_MIL )
#define L_WAR(GROUP) ZYPP_BASE_LOGGER_LOG( GROUP, zypp::base::logger::E_WAR )
#define L_ERR(GROUP) ZYPP_BASE_LOGGER_LOG( GROUP, zypp::base::logger::E_ERR )
#define L_SEC(GROUP) ZYPP_BASE_LOGGER_LOG( GROUP, zypp::base::logger::E_SEC )
#define L_INT(GROUP) ZYPP_BASE_LOGGER_LOG( GROUP, zypp::base::logger::E_INT )
#define L_USR(GROUP) ZYPP_BASE_LOGGER_LOG( GROUP, zypp::base::logger::E_USR )
 
 
#define L_ENV_CONSTR_DEFINE_FUNC(ENV) \
    namespace zypp::log { \
      bool has_env_constr_##ENV () \
      { \
          static bool has_##ENV = (::getenv(#ENV) != NULL); \
          return has_##ENV; \
      } \
      const char *empty_or_group_if_##ENV ( const char *group ) \
      { \
        return has_env_constr_##ENV() ? group : nullptr; \
      } \
    }
 
#define L_ENV_CONSTR_FWD_DECLARE_FUNC(ENV) namespace zypp::log { bool has_env_constr_##ENV (); const char *empty_or_group_if_##ENV ( const char *group ); }
#define L_ENV_CONSTR(ENV,GROUP,LEVEL) ZYPP_BASE_LOGGER_LOG( zypp::log::empty_or_group_if_##ENV( GROUP ), LEVEL )
 
#define L_BASEFILE ( *__FILE__ == '/' ? strrchr( __FILE__, '/' ) + 1 : __FILE__ )
 
#define ZYPP_BASE_LOGGER_LOG(GROUP,LEVEL) \
        zypp::base::logger::getStream( GROUP, LEVEL, L_BASEFILE, __FUNCTION__, __LINE__ )
 
namespace zypp
{ 
  namespace base
  { 
 
    namespace logger
    { 
 
      enum LogLevel {
        E_XXX = 999, 
        E_DBG = 0,   
        E_MIL,       
        E_WAR,       
        E_ERR,       
        E_SEC,       
        E_INT,       
        E_USR        
      };
 
      extern std::ostream & getStream( const char * group_r,
                                       LogLevel     level_r,
                                       const char * file_r,
                                       const char * func_r,
                                       const int    line_r );
      extern bool isExcessive();
 
    } // namespace logger
 
  } // namespace base
} // namespace zypp
#endif // ZYPP_BASE_LOGGER_H