| # Gaudi Framework, version v21r10p1 |

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# MsgStream Class Reference

Definition of the MsgStream class used to transmit messages. More...

`#include <GaudiKernel/MsgStream.h>`

Collaboration diagram for MsgStream:

[legend]

List of all members.

## Public Member Functions
GAUDI_API | MsgStream (IMessageSvc *svc, int buffer_length=128)
| Standard constructor: Connect to message service for output.
GAUDI_API | MsgStream (IMessageSvc *svc, const std::string &source, int buffer_length=128)
| Standard constructor: Connect to message service for output.
| MsgStream (const MsgStream &msg)
| Copy constructor.
virtual GAUDI_API | ~MsgStream ()
| Standard destructor.
MsgStream & | report (int lvl)
| Initialize report of new message: activate if print level is sufficient.
virtual GAUDI_API MsgStream & | doOutput ()
| Output method.
const std::string & | buffer () const
| Access string buffer.
std::ostringstream & | stream ()
| Access string MsgStream.
void | setMsgSvc (IMessageSvc *svc)
| Update `IMessageSvc` pointer.
void | setLevel (int level)
| Update outputlevel.
MSG::Level | level ()
| Retrieve output level.
MSG::Level | currentLevel ()
| Retrieve current stream output level.
void | activate ()
| Activate MsgStream.
void | deactivate ()
| Deactivate MsgStream.
bool | isActive () const
| Accessor: is MsgStream active.
MsgStream & | flush ()
MsgStream & | write (const char *buff, int len)
MsgStream & | operator<< (MsgStream &(*_f)(MsgStream &))
| Accept MsgStream modifiers.
MsgStream & | operator<< (std::ostream &(*_f)(std::ostream &))
| Accept oMsgStream modifiers.
MsgStream & | operator<< (std::ios &(*_f)(std::ios &))
| Accept ios modifiers.
MsgStream & | operator<< (MSG::Level level)
| Accept MsgStream activation using MsgStreamer operator.
MsgStream & | operator<< (longlong arg)
MsgStream & | operator<< (std::ios_base &(*_f)(std::ios_base &))
| Accept ios base class modifiers.
long | flags () const
| IOS emulation.
long | flags (FLAG_TYPE v)
long | setf (FLAG_TYPE v)
int | width () const
int | width (int v)
char | fill () const
char | fill (char v)
int | precision () const
int | precision (int v)
int | rdstate () const
int | good () const
int | eof () const
int | bad () const
long | setf (FLAG_TYPE _f, FLAG_TYPE _m)
void | unsetf (FLAG_TYPE _l)
void | clear (STATE_TYPE _i=std::ios_base::failbit)
GAUDI_API void | setColor (MSG::Color col)
| Set the text color.
GAUDI_API void | setColor (MSG::Color fg, MSG::Color bg)
| Set the foreground and background colors.
GAUDI_API void | resetColor ()
| Reset the colors to defaults.
## Protected Attributes
IMessageSvc * | m_service
| Pointer to message service if buffer has send.
std::string | m_buffer
| Use standard string for information buffering.
std::string | m_source
| Use std::string for source information to be passed to the message service.
std::ostringstream | m_stream
| String MsgStream associated to buffer.
bool | m_active
| Flag set to true if formatting engine is active.
MSG::Level | m_level
| Debug level of the message service.
MSG::Level | m_currLevel
| Current debug level.
bool | m_useColors
| use colors
## Private Types
typedef std::ios_base::fmtflags | FLAG_TYPE
| Error return code in case ios modification is requested for inactive streams.
typedef std::ios_base::iostate | STATE_TYPE

## Detailed Description

Definition of the MsgStream class used to transmit messages.

This class is intended to ease the use of error logging to the message service

Author:
  M.Frank

  Sebastien Ponce

Definition at line 25 of file MsgStream.h.

## Member Typedef Documentation

typedef std::ios_base::fmtflags MsgStream::FLAG_TYPE`[private]`

Error return code in case ios modification is requested for inactive streams.

Definition at line 30 of file MsgStream.h.

typedef std::ios_base::iostate MsgStream::STATE_TYPE`[private]`

Definition at line 31 of file MsgStream.h.

## Constructor & Destructor Documentation

MsgStream::MsgStream | ( | IMessageSvc * | svc,
|  | int | buffer_length = `128` |
| ) |  |  |

Standard constructor: Connect to message service for output.

Definition at line 31 of file MsgStream.cpp.

    00032 : m_service(svc),
    00033   m_source(""),
    00034   m_active(false)
    00035 {
    00036   setLevel((0==svc) ? MSG::INFO : svc->outputLevel());
    00037   m_useColors = (0==svc) ? false : svc->useColor();
    00038 }

MsgStream::MsgStream | ( | IMessageSvc * | svc,
|  | const std::string & | source,
|  | int | buffer_length = `128` |
| ) |  |  |

Standard constructor: Connect to message service for output.

Definition at line 40 of file MsgStream.cpp.

    00041 : m_service(svc),
    00042   m_source(source),
    00043   m_active(false)
    00044 {
    00045   setLevel((0==svc) ? MSG::INFO : svc->outputLevel(source));
    00046   m_useColors = (0==svc) ? false : svc->useColor();
    00047 }

MsgStream::MsgStream | ( | const MsgStream & | msg | ) | `[inline]`

Copy constructor.

Definition at line 55 of file MsgStream.h.

    00056     : m_service(msg.m_service),
    00057       m_active(msg.m_active),
    00058       m_level(msg.m_level),
    00059       m_useColors(msg.m_useColors)
    00060   {
    00061     try { // ignore exception if we cannot copy the string
    00062       m_source = msg.m_source;
    00063     }
    00064     catch (...) {}
    00065   }

MsgStream::~MsgStream | ( |  | ) | `[virtual]`

Standard destructor.

Definition at line 49 of file MsgStream.cpp.

    00049                          {
    00050 }

## Member Function Documentation

MsgStream& MsgStream::report | ( | int | lvl | ) | `[inline]`

Initialize report of new message: activate if print level is sufficient.

Definition at line 69 of file MsgStream.h.

    00069                                {
    00070     lvl = (lvl >= MSG::NUM_LEVELS) ?
    00071       MSG::ALWAYS : (lvl<MSG::NIL) ? MSG::NIL : lvl;
    00072     ((m_currLevel=MSG::Level(lvl)) >= level()) ? activate() : deactivate();
    00073     return *this;
    00074   }

MsgStream & MsgStream::doOutput | ( |  | ) | `[virtual]`

Output method.

Definition at line 52 of file MsgStream.cpp.

    00052                                      {
    00053   try {
    00054     // This piece of code may throw and we cannot afford it when we print a message
    00055     // in the middle of a catch block.
    00056     if ( isActive() )   {
    00057       Message msg(m_source,m_currLevel,m_stream.str());
    00058       if ( m_service != 0 )   {
    00059         m_service->reportMessage (msg, m_currLevel);
    00060       }
    00061       else     {
    00062         std::cout << msg << std::endl;
    00063       }
    00064     }
    00065     m_stream.str("");
    00066   } catch(...) {}
    00067   return *this;
    00068 }

const std::string& MsgStream::buffer | ( |  | ) | const`[inline]`

Access string buffer.

Definition at line 78 of file MsgStream.h.

    00078                                   {
    00079     return m_buffer;
    00080   }

std::ostringstream& MsgStream::stream | ( |  | ) | `[inline]`

Access string MsgStream.

Definition at line 82 of file MsgStream.h.

    00082                                {
    00083     return m_stream;
    00084   }

void MsgStream::setMsgSvc | ( | IMessageSvc * | svc | ) | `[inline]`

Update `IMessageSvc` pointer.

Definition at line 86 of file MsgStream.h.

    00086                                      {
    00087     m_service = svc;
    00088   }

void MsgStream::setLevel | ( | int | level | ) | `[inline]`

Update outputlevel.

Definition at line 90 of file MsgStream.h.

    00090                               {
    00091     level = (level >= MSG::NUM_LEVELS) ?
    00092       MSG::ALWAYS : (level<MSG::NIL) ? MSG::NIL : level;
    00093     m_level = MSG::Level(level);
    00094   }

MSG::Level MsgStream::level | ( |  | ) | `[inline]`

Retrieve output level.

Definition at line 96 of file MsgStream.h.

    00096                      {
    00097     return m_level;
    00098   }

MSG::Level MsgStream::currentLevel | ( |  | ) | `[inline]`

Retrieve current stream output level.

Definition at line 100 of file MsgStream.h.

    00100                             {
    00101     return m_currLevel;
    00102   }

void MsgStream::activate | ( |  | ) | `[inline]`

Activate MsgStream.

Definition at line 104 of file MsgStream.h.

    00104                       {
    00105     m_active = true;
    00106   }

void MsgStream::deactivate | ( |  | ) | `[inline]`

Deactivate MsgStream.

Definition at line 108 of file MsgStream.h.

    00108                         {
    00109     m_active = false;
    00110   }

bool MsgStream::isActive | ( |  | ) | const`[inline]`

Accessor: is MsgStream active.

Definition at line 112 of file MsgStream.h.

    00112                            {
    00113     return m_active;
    00114   }

MsgStream& MsgStream::flush | ( |  | ) | `[inline]`

Definition at line 116 of file MsgStream.h.

    00116                         {
    00117     if ( isActive() ) m_stream.flush();
    00118     return *this;
    00119   }

MsgStream& MsgStream::write | ( | const char * | buff,
|  | int | len |
| ) |  |  | `[inline]`

Definition at line 121 of file MsgStream.h.

    00121                                               {
    00122     if ( isActive() ) m_stream.write(buff, len);
    00123     return *this;
    00124   }

MsgStream& MsgStream::operator<< | ( | MsgStream &(*)(MsgStream &) | _f | ) | `[inline]`

Accept MsgStream modifiers.

Definition at line 126 of file MsgStream.h.

    00126                                                          {
    00127     if ( isActive() ) _f(*this);
    00128     return *this;
    00129   }

MsgStream& MsgStream::operator<< | ( | std::ostream &(*)(std::ostream &) | _f | ) | `[inline]`

Accept oMsgStream modifiers.

Definition at line 131 of file MsgStream.h.

    00131                                                            {
    00132     if ( isActive() ) _f(m_stream);
    00133     return *this;
    00134   }

MsgStream& MsgStream::operator<< | ( | std::ios &(*)(std::ios &) | _f | ) | `[inline]`

Accept ios modifiers.

Definition at line 136 of file MsgStream.h.

    00136                                                    {
    00137     if ( isActive() ) _f(m_stream);
    00138     return *this;
    00139   }

MsgStream& MsgStream::operator<< | ( | MSG::Level | level | ) | `[inline]`

Accept MsgStream activation using MsgStreamer operator.

Definition at line 141 of file MsgStream.h.

    00141                                           {
    00142     return report(level);
    00143   }

MsgStream& MsgStream::operator<< | ( | longlong | arg | ) | `[inline]`

Definition at line 144 of file MsgStream.h.

    00144                                       {
    00145     try {
    00146       // this may throw, and we cannot afford it if the stream is used in a catch block
    00147       if(isActive()) {
    00148 #ifdef _WIN32
    00149         int flg = m_stream.flags();
    00150         char buf[128];
    00151         (flg & std::ios::hex) ?
    00152           ::sprintf(buf,"%I64x",arg) : ::sprintf(buf,"%I64d",arg);
    00153         m_stream << buf;
    00154 #else
    00155         m_stream << arg;
    00156 #endif
    00157       }
    00158     } catch (...) {}
    00159     return *this;
    00160   }

MsgStream& MsgStream::operator<< | ( | std::ios_base &(*)(std::ios_base &) | _f | ) | `[inline]`

Accept ios base class modifiers.

Definition at line 163 of file MsgStream.h.

    00163                                                              {
    00164     if ( isActive() ) _f(m_stream);
    00165     return *this;
    00166   }

long MsgStream::flags | ( |  | ) | const`[inline]`

IOS emulation.

Definition at line 169 of file MsgStream.h.

    00169                      {
    00170     return isActive() ? m_stream.flags()    : 0;
    00171   }

long MsgStream::flags | ( | FLAG_TYPE | v | ) | `[inline]`

Definition at line 172 of file MsgStream.h.

    00172                           {
    00173     return isActive() ? m_stream.flags(v)  :  0;
    00174   }

long MsgStream::setf | ( | FLAG_TYPE | v | ) | `[inline]`

Definition at line 175 of file MsgStream.h.

    00175                          {
    00176     return isActive() ? m_stream.setf(v)  :  0;
    00177   }

int MsgStream::width | ( |  | ) | const`[inline]`

Definition at line 178 of file MsgStream.h.

    00178                     {
    00179     return isActive() ? m_stream.width()    : 0;
    00180   }

int MsgStream::width | ( | int | v | ) | `[inline]`

Definition at line 181 of file MsgStream.h.

    00181                    {
    00182     return isActive() ? m_stream.width(v)    : 0;
    00183   }

char MsgStream::fill | ( |  | ) | const`[inline]`

Definition at line 184 of file MsgStream.h.

    00184                     {
    00185     return isActive() ? m_stream.fill()     : (char)-1;
    00186   }

char MsgStream::fill | ( | char | v | ) | `[inline]`

Definition at line 187 of file MsgStream.h.

    00187                     {
    00188     return isActive() ? m_stream.fill(v)     : (char)-1;
    00189   }

int MsgStream::precision | ( |  | ) | const`[inline]`

Definition at line 190 of file MsgStream.h.

    00190                          {
    00191     return isActive() ? m_stream.precision(): 0;
    00192   }

int MsgStream::precision | ( | int | v | ) | `[inline]`

Definition at line 193 of file MsgStream.h.

    00193                        {
    00194     return isActive() ? m_stream.precision(v): 0;
    00195   }

int MsgStream::rdstate | ( |  | ) | const`[inline]`

Definition at line 196 of file MsgStream.h.

    00196                        {
    00197     return isActive() ? m_stream.rdstate () : std::ios_base::failbit;
    00198   }

int MsgStream::good | ( |  | ) | const`[inline]`

Definition at line 199 of file MsgStream.h.

    00199                     {
    00200     return isActive() ? m_stream.good ()    : 0;
    00201   }

int MsgStream::eof | ( |  | ) | const`[inline]`

Definition at line 202 of file MsgStream.h.

    00202                    {
    00203     return isActive() ? m_stream.eof ()     : 0;
    00204   }

int MsgStream::bad | ( |  | ) | const`[inline]`

Definition at line 205 of file MsgStream.h.

    00205                    {
    00206     return isActive() ? m_stream.bad()      : 0;
    00207   }

long MsgStream::setf | ( | FLAG_TYPE | _f,
|  | FLAG_TYPE | _m |
| ) |  |  | `[inline]`

Definition at line 208 of file MsgStream.h.

    00208                                         {
    00209     return isActive() ? m_stream.setf(_f, _m)   : 0;
    00210   }

void MsgStream::unsetf | ( | FLAG_TYPE | _l | ) | `[inline]`

Definition at line 211 of file MsgStream.h.

    00211                                {
    00212     if ( isActive() ) m_stream.unsetf(_l);
    00213   }

void MsgStream::clear | ( | STATE_TYPE | _i = `std::ios_base::failbit` | ) | `[inline]`

Definition at line 214 of file MsgStream.h.

    00214                                                   {
    00215     if ( isActive() ) m_stream.clear(_i);
    00216   }

void MsgStream::setColor | ( | MSG::Color | col | ) |

Set the text color.

Definition at line 70 of file MsgStream.cpp.

    00070                                      {
    00071 #ifndef _WIN32
    00072   if ( m_useColors)   {
    00073     int fc = 90 + col;
    00074     try { // this may throw and we must not do it
    00075       m_stream << "[" << fc << ";1m";
    00076     }
    00077     catch(...) {}
    00078   }
    00079 #endif
    00080 }

void MsgStream::setColor | ( | MSG::Color | fg,
|  | MSG::Color | bg |
| ) |  |  |

Set the foreground and background colors.

Definition at line 82 of file MsgStream.cpp.

    00082                                                  {
    00083 #ifndef _WIN32
    00084   if ( m_useColors )   {
    00085     try { // this may throw and we must not do it
    00086       int fc = 90 + fg;
    00087       m_stream << "[" << fc;
    00088       int bc = 100 + bg;
    00089       m_stream << ";" << bc;
    00090       m_stream << ";1m";
    00091     }
    00092     catch(...) {}
    00093   }
    00094 #endif
    00095 }

void MsgStream::resetColor | ( |  | ) |

Reset the colors to defaults.

Definition at line 97 of file MsgStream.cpp.

    00097                            {
    00098 #ifndef _WIN32
    00099   if ( m_useColors )   {
    00100     try { // this may throw and we must not do it
    00101       m_stream << "[m" << m_service->getLogColor(m_currLevel);
    00102     }
    00103     catch(...) {}
    00104   }
    00105 #endif
    00106 }

## Member Data Documentation

IMessageSvc* MsgStream::m_service`[protected]`

Pointer to message service if buffer has send.

Definition at line 34 of file MsgStream.h.

std::string MsgStream::m_buffer`[protected]`

Use standard string for information buffering.

Definition at line 36 of file MsgStream.h.

std::string MsgStream::m_source`[protected]`

Use std::string for source information to be passed to the message service.

Definition at line 38 of file MsgStream.h.

std::ostringstream MsgStream::m_stream`[protected]`

String MsgStream associated to buffer.

Definition at line 40 of file MsgStream.h.

bool MsgStream::m_active`[protected]`

Flag set to true if formatting engine is active.

Definition at line 42 of file MsgStream.h.

MSG::Level MsgStream::m_level`[protected]`

Debug level of the message service.

Definition at line 44 of file MsgStream.h.

MSG::Level MsgStream::m_currLevel`[protected]`

Current debug level.

Definition at line 46 of file MsgStream.h.

bool MsgStream::m_useColors`[protected]`

use colors

Definition at line 48 of file MsgStream.h.

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

- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v21r10p1/GaudiKernel/GaudiKernel/MsgStream.h
- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v21r10p1/GaudiKernel/src/Lib/MsgStream.cpp