Utils/Logger/Log.hh

   1 // $Id$
   2 //
   3 // Copyright (C) 2007
   4 // Fraunhofer Institut fuer offene Kommunikationssysteme (FOKUS)
   5 // Kompetenzzentrum fuer Satelitenkommunikation (SatCom)
   6 //     Stefan Bund <g0dil@berlios.de>
   7 //
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 2 of the License, or
  11 // (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the
  20 // Free Software Foundation, Inc.,
  21 // 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22
  23 /** \file
  24     \brief Log public header */
  25
  26 #ifndef HH_Log_
  27 #define HH_Log_ 1
  28
  29 // Custom includes
  30 #include <boost/preprocessor/seq/size.hpp>
  31 #include <boost/preprocessor/dec.hpp>
  32 #include <boost/preprocessor/seq/elem.hpp>
  33 #include <boost/preprocessor/seq/pop_back.hpp>
  34 #include "Parameters.hh"
  35
  36 //#include "Log.mpp"
  37 ///////////////////////////////hh.p////////////////////////////////////////
  38
  39 /** \brief Write log message
  40
  41     This macro will write it's last argument to the log stream. The last argument must be an
  42     expression which will be placed after a streaming \c operator<< (like
  43     <i>some-log-sttream</i> \c << <i>last-macro-arg</i>).
  44     \code
  45     SENF_LOG((parameters...)("log message " << args << ...));
  46     \endcode
  47
  48     \hideinitializer
  49  */
  50 #define SENF_LOG(args)                                                                            \
  51     SENF_LOG_BLOCK_( SENF_LOG_MERGE_PARAMETERS(BOOST_PP_SEQ_POP_BACK(args)),                      \
  52                      { log << BOOST_PP_SEQ_ELEM(BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(args)),args); })
  53
  54 /** \brief Enable block based on logging parameters
  55
  56     This macro is like SENF_LOG, however instead of writing a simple message, this macro allows
  57     to specify a complete block of code to be executed if the log message is enabled.
  58     \code
  59     SENF_LOG_BLOCK((parameters...)({
  60        // arbitrary code using 'log' for logging
  61        log << "log message";
  62     }));
  63     \endcode
  64
  65     \hideinitializer
  66  */
  67 #define SENF_LOG_BLOCK(args)                                                                      \
  68     SENF_LOG_BLOCK_( SENF_LOG_MERGE_PARAMETERS(BOOST_PP_SEQ_POP_BACK(args)),                      \
  69                      BOOST_PP_SEQ_ELEM(BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(args)),args))
  70
  71 #define SENF_LOG_BLOCK_(parameters, block)                                                        \
  72     do {                                                                                          \
  73         if (parameters::compile_enabled && parameters::enabled()) {                               \
  74             std::ostream & log (parameters::log_stream());                                         \
  75             do block while(0);                                                                    \
  76             log << std::endl;                                                                     \
  77         }                                                                                         \
  78     } while(0)
  79
  80 ///////////////////////////////hh.e////////////////////////////////////////
  81 //#include "Log.cci"
  82 //#include "Log.ct"
  83 //#include "Log.cti"
  84 #endif
  85
  86 \f
  87 // Local Variables:
  88 // mode: c++
  89 // fill-column: 100
  90 // comment-column: 40
  91 // c-file-style: "senf"
  92 // indent-tabs-mode: nil
  93 // ispell-local-dictionary: "american"
  94 // compile-command: "scons -u test"
  95 // End: