OSDLCDROMDriveHandler.cc

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#include "OSDLCDROMDriveHandler.h"

#include "OSDLCDROMDrive.h"  // for CDROMDrive

#include "OSDLBasic.h"       // for CommonModule
#include "OSDLUtils.h"       // for getBackendLastError


#include "SDL.h"             // for CD-ROM primitives

#include <list>  

using std::list ;
using std::string ;
using std::map ;


using namespace OSDL ;



CDROMDriveException::CDROMDriveException( const std::string & message ) 
        throw() :
    OSDL::Exception( message )
{

}


CDROMDriveException::~CDROMDriveException() throw()
{

}




CDROMDriveHandler::CDROMDriveHandler() throw( CDROMDriveException ) :
     Object(),
     _drives()
{
    
    send( "Initializing CD-ROM subsystem" ) ;
        
    if ( SDL_InitSubSystem( CommonModule::UseCDROM ) 
            != CommonModule::BackendSuccess ) 
        throw CDROMDriveException( "CDROMDriveHandler constructor : "
                "unable to initialize CD-ROM subsystem : " 
                + Utils::getBackendLastError() ) ;
                
    send( "CD-ROM subsystem initialized" ) ;                

}


CDROMDriveHandler::~CDROMDriveHandler() throw()
{

    send( "Stopping CD-ROM subsystem." ) ;

    for ( map<CDROMDriveNumber, CDROMDrive *>::const_iterator it 
        = _drives.begin() ; it != _drives.end(); it++ )
    {
        delete (*it).second ;
    }
    
    // Useless but deemed safer :
    _drives.clear() ;
        
    SDL_QuitSubSystem( CommonModule::UseCDROM ) ;

    send( "CD-ROM subsystem stopped." ) ;

}
            


CDROMDriveNumber CDROMDriveHandler::GetAvailableCDROMDrivesCount() throw()
{
    return SDL_CDNumDrives() ;
}


CDROMDrive & CDROMDriveHandler::getCDROMDrive( CDROMDriveNumber number ) 
    throw( CDROMDriveException )
{
    
    map<CDROMDriveNumber, CDROMDrive *>::const_iterator it 
        = _drives.find( number ) ;
    
    if ( it != _drives.end() )
    {
        
        // Drive found :
        return * (*it).second ;
    
    }
        
    // Else : drive not already created, let's try to create it :
    CDROMDrive * newDrive = new CDROMDrive( number ) ;
    
    /*
     * Here the creation succeeded (otherwise an exception is propagated 
     * as expected) :
     *
     */
    _drives[ number ] = newDrive ;
    
    return *newDrive ;
    
}

                
const std::string CDROMDriveHandler::toString( Ceylan::VerbosityLevels level )
    const throw()
{
        
    CDROMDriveNumber driveNumber = GetAvailableCDROMDrivesCount() ;
    
    if ( driveNumber == 0 )
        return "No available CD-ROM drive found" ;
    
    if ( _drives.empty() )
        return "None of the " + Ceylan::toString( driveNumber ) 
            + " available drive(s) is currently opened." ;
    
    // At least a drive is available, at least one is opened :
            
    list<string> descriptions ;
    
    for ( map<CDROMDriveNumber, CDROMDrive *>::const_iterator it 
        = _drives.begin() ; it != _drives.end(); it++ )
    {
        descriptions.push_back( (*it).second->toString() ) ;
    }
    
    return "Out of " + Ceylan::toString( driveNumber ) 
        + " available CD-ROM drive(s), " 
        + Ceylan::toString( _drives.size() ) + " is/are opened : " 
        + Ceylan::formatStringList( descriptions ) ;    

}               
            

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