source/core/tracing/TraceLogger.cpp

   1 // ANNA - Anna is Not Nothingness Anymore                                                         //
   2 //                                                                                                //
   3 // (c) Copyright 2005-2015 Eduardo Ramos Testillano & Francisco Ruiz Rayo                         //
   4 //                                                                                                //
   5 // See project site at http://redmine.teslayout.com/projects/anna-suite                           //
   6 // See accompanying file LICENSE or copy at http://www.teslayout.com/projects/public/anna.LICENSE //
   7
   8
   9 #include <stdarg.h>
  10 #include <stdio.h>
  11 #include <syslog.h>
  12
  13 #include <anna/core/tracing/Logger.hpp>
  14 #include <anna/core/tracing/TraceLogger.hpp>
  15 #include <anna/core/DataBlock.hpp>
  16
  17 using namespace anna;
  18
  19 void TraceLogger::initialize(const char* ident)
  20 {
  21   openlog(ident, LOG_PID | LOG_CONS | LOG_ODELAY | LOG_NOWAIT, LOG_LOCAL0);
  22 }
  23
  24 void TraceLogger::do_write(int level, const char* message, ...)
  25 {
  26   va_list ap;
  27   int size;
  28   int nbytes;
  29
  30   try {
  31     DataBlock& dataBlock(getDataBlock());
  32     const char* data(dataBlock.getData());
  33     size = dataBlock.getMaxSize();
  34
  35     while(true) {
  36       va_start(ap, message);
  37       nbytes = vsnprintf(const_cast <char*>(data), size, message, ap);
  38       va_end(ap);
  39
  40       if(nbytes >= size) {
  41         dataBlock.allocate(nbytes + 1);
  42         data = dataBlock.getData();
  43         size = dataBlock.getMaxSize();
  44         continue;
  45       }
  46
  47       break;
  48     }
  49
  50     // void syslog(int priority, const char *format, ...);
  51     syslog(level, "%s", data);
  52   } catch(Exception&) {
  53   }
  54 }
  55