log.h

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#if !defined(VITA_LOG_H)
#define      VITA_LOG_H
 
#include <memory>
#include <sstream>
 
#include "kernel/common.h"
 
namespace vita
{
 
class log
{
public:
  enum level {lALL, lDEBUG, lINFO, lOUTPUT, lWARNING, lERROR, lFATAL, lOFF};
 
  static level reporting_level;
 
  static std::unique_ptr<std::ostream> stream;
  static void setup_stream(const std::string &base);
 
  explicit log();
  log(const log &) = delete;
  log &operator=(const log &) = delete;
 
  virtual ~log();
 
  std::ostringstream &get(level = lOUTPUT);
 
protected:
  std::ostringstream os;
 
private:
  level level_;  // current log level
};
 
#if defined(NDEBUG)
#define vitaPRINT(level) if (level == log::lDEBUG);\
                         else if (level < log::reporting_level);\
                         else log().get(level)
#else
#define vitaPRINT(level) if (level < log::reporting_level);\
                         else log().get(level)
#endif
 
#define vitaFATAL   vitaPRINT(log::lFATAL)
#define vitaDEBUG   vitaPRINT(log::lDEBUG)
#define vitaERROR   vitaPRINT(log::lERROR)
#define vitaINFO    vitaPRINT(log::lINFO)
#define vitaOUTPUT  vitaPRINT(log::lOUTPUT)
#define vitaWARNING vitaPRINT(log::lWARNING)
 
}  // namespace vita
#endif  // include guard