void CLogic::quantize_to_allowed_states( CValue &value, const value_set &allowed_states ) const
{
const CValue *nearest_allowed_state = NULL;
float distance_to_current = 0;
float distance_to_nearest_allowed_state = 0;
bool first = true;
for( value_set::const_iterator i = allowed_states.begin(); i != allowed_states.end(); i++ )
{
const CValue *allowed_state = *i;
if( value.get_type() != allowed_state->get_type() )
{
INTEGRA_TRACE_ERROR << "Value type mismatch whilst quantizing to allowed states";
continue;
}
distance_to_current = value.get_distance( *allowed_state );
if( first || distance_to_current < distance_to_nearest_allowed_state )
{
distance_to_nearest_allowed_state = distance_to_current;
nearest_allowed_state = allowed_state;
first = false;
}
}
if( !nearest_allowed_state )
{
INTEGRA_TRACE_ERROR << "failed to quantize to allowed states - allowed states is empty";
return;
}
assert( nearest_allowed_state->get_type() == value.get_type() );
value = *nearest_allowed_state;
}
bool CStateInfo::test_constraint( const CValue &value ) const
{
CValue::type endpoint_type = get_type();
if( value.get_type() != endpoint_type )
{
CValue *fixed_type = value.transmogrify( endpoint_type );
bool test_result = test_constraint( *fixed_type );
delete fixed_type;
return test_result;
}
const IConstraint &constraint = get_constraint();
const IValueRange *range = constraint.get_value_range();
if( range )
{
switch( value.get_type() )
{
case CValue::STRING:
{
/* for strings, range constraint defines min/max length */
const string &string_value = value;
int string_length = string_value.length();
if( string_length < ( int ) range->get_minimum() ) return false;
if( string_length > ( int ) range->get_maximum() ) return false;
return true;
}
case CValue::INTEGER:
{
/* for integers, range constraint defines min/max value */
int int_value = value;
if( int_value < ( int ) range->get_minimum() ) return false;
if( int_value > ( int ) range->get_maximum() ) return false;
return true;
}
case CValue::FLOAT:
{
/* for floats, range constraint defines min/max value */
float float_value = value;
if( float_value < ( float ) range->get_minimum() ) return false;
if( float_value > ( float ) range->get_maximum() ) return false;
return true;
}
default:
INTEGRA_TRACE_ERROR << "unhandled value type";
return false;
}
}
else /* allowed value constraint */
{
const value_set *allowed_states = constraint.get_allowed_states();
assert( allowed_states );
for( value_set::const_iterator i = allowed_states->begin(); i != allowed_states->end(); i++ )
{
if( value.is_equal( **i ) )
{
return true;
}
}
return false; //not found
}
}