source/debuglog.cc

   1 /* This file is part of Shapes.
   2  *
   3  * Shapes is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, either version 3 of the License, or
   6  * any later version.
   7  *
   8  * Shapes is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with Shapes.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  * Copyright 2008 Henrik Tidefelt
  17  */
  18
  19 #include "debuglog.h"
  20 #include "shapesexceptions.h"
  21
  22 using namespace Shapes;
  23
  24 Kernel::DebugLog::DebugLog( )
  25         : os_( 0 )
  26 { }
  27
  28 Kernel::DebugLog::~DebugLog( )
  29 { }
  30
  31 bool
  32 Kernel::DebugLog::initialized( ) const
  33 {
  34         return os_ != 0 || ! filename_.empty( );
  35 }
  36
  37 void
  38 Kernel::DebugLog::setStream( std::ostream * os )
  39 {
  40         if( initialized( ) )
  41                 {
  42                         throw "Multiply specified debug log";
  43                 }
  44         os_ = os;
  45 }
  46
  47 void
  48 Kernel::DebugLog::setFilename( const std::string & filename )
  49 {
  50         if( initialized( ) )
  51                 {
  52                         throw "Multiply specified debug log";
  53                 }
  54         filename_ = filename;
  55 }
  56
  57 std::ostream &
  58 Kernel::DebugLog::os( )
  59 {
  60         if( os_ == 0 )
  61                 {
  62                         if( filename_.empty( ) )
  63                                 {
  64                                         throw Exceptions::InternalError( "The debug log filename was not initialized before it was needed." );
  65                                 }
  66                         myFile_.open( filename_.c_str( ) );
  67                         if( ! myFile_.is_open( ) )
  68                                 {
  69                                         throw Exceptions::FileWriteOpenError( Ast::THE_UNKNOWN_LOCATION, strrefdup( filename_ ), "(debug log)" );
  70                                 }
  71                         os_ = & myFile_;
  72                 }
  73         return *os_;
  74 }