MsgStream.cpp

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/***********************************************************************************\
* (c) Copyright 1998-2025 CERN for the benefit of the LHCb and ATLAS collaborations *
*                                                                                   *
* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
*                                                                                   *
* In applying this licence, CERN does not waive the privileges and immunities       *
* granted to it by virtue of its status as an Intergovernmental Organization        *
* or submit itself to any jurisdiction.                                             *
\***********************************************************************************/
#include <GaudiKernel/GaudiException.h>
#include <GaudiKernel/IMessageSvc.h>
#include <GaudiKernel/Message.h>
#include <GaudiKernel/MsgStream.h>
#include <cstdarg>
#include <cstdio>
#include <iostream>
 
bool MsgStream::m_countInactive = false;
 
bool MsgStream::enableCountInactive( bool value ) {
  bool old        = m_countInactive;
  m_countInactive = value;
  return old;
}
 
bool MsgStream::countInactive() { return m_countInactive; }
 
MsgStream::MsgStream( IMessageSvc* svc, int ) : m_service( svc ) {
  setLevel( svc ? svc->outputLevel() : MSG::INFO );
  m_currLevel = m_level;
  m_useColors = ( svc ? svc->useColor() : false );
#ifndef NDEBUG
  m_inactCounter = svc ? Gaudi::Cast<IInactiveMessageCounter>( svc ) : 0;
#endif
}
 
MsgStream::MsgStream( IMessageSvc* svc, std::string source, int ) : m_service( svc ), m_source( std::move( source ) ) {
  setLevel( svc ? svc->outputLevel( m_source ) : MSG::INFO );
  m_currLevel = m_level;
  m_useColors = ( svc && svc->useColor() );
#ifndef NDEBUG
  m_inactCounter = svc ? Gaudi::Cast<IInactiveMessageCounter>( svc ) : 0;
#endif
}
 
MsgStream& MsgStream::doOutput() {
  try {
    // This piece of code may throw and we cannot afford it when we print a message
    // in the middle of a catch block.
    if ( isActive() ) {
      const Message msg( m_source, m_currLevel, m_stream.str() );
      if ( m_service ) {
        m_service->reportMessage( msg, m_currLevel );
      } else {
        std::cout << msg << std::endl;
      }
    }
    m_stream.str( "" );
  } catch ( ... ) {}
  return *this;
}
 
void MsgStream::setColor( MSG::Color col ) {
  if ( m_useColors ) {
    int fc = 90 + col;
    try { // this may throw and we must not do it
      m_stream << "\x1b[" << fc << ";1m";
    } catch ( ... ) {}
  }
}
 
void MsgStream::setColor( MSG::Color fg, MSG::Color bg ) {
  if ( m_useColors ) {
    try { // this may throw and we must not do it
      int fc = 90 + fg;
      m_stream << "\x1b[" << fc;
      int bc = 100 + bg;
      m_stream << ";" << bc;
      m_stream << ";1m";
    } catch ( ... ) {}
  }
}
 
void MsgStream::resetColor() {
  if ( m_useColors ) {
    try { // this may throw and we must not do it
      m_stream << "\x1b[m" << m_service->getLogColor( m_currLevel );
    } catch ( ... ) {}
  }
}
 
std::string format( const char* fmt, ... ) {
  const int   buffsize = 2048;
  static char buffer[buffsize];
  va_list     arguments;
  va_start( arguments, fmt );
  if ( vsnprintf( buffer, buffsize, fmt, arguments ) >= buffsize ) {
    va_end( arguments );
    throw GaudiException( "Insufficient buffer size (" + std::to_string( buffsize ) + ") when formatting message",
                          "MsgStream", StatusCode::FAILURE );
  }
  va_end( arguments );
  return std::string( buffer );
}