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#include "bu/randomsystem.h"
#include "bu/file.h"
Bu::RandomSystem::RandomSystem( Type eType ) :
eType( eType ),
pSrc( 0 )
{
switch( eType )
{
case Bu::RandomSystem::Fast:
pSrc = new Bu::File("/dev/urandom", Bu::File::Read );
break;
case Bu::RandomSystem::Good:
pSrc = new Bu::File("/dev/random", Bu::File::Read );
break;
}
}
Bu::RandomSystem::~RandomSystem()
{
delete pSrc;
}
void Bu::RandomSystem::seed( int32_t /*iSeed*/ )
{
// Seed really has no effect here...
// on linux, if we were root, we could write data to random/urandom to
// perturb the data, but it's not necesarry
}
int32_t Bu::RandomSystem::rand()
{
if( !pSrc )
throw Bu::ExceptionBase("Not initialized");
int32_t i;
pSrc->read( &i, sizeof(int32_t) );
return i;
}
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