Exemplo n.º 1
0
//=========================================================================================
bool BinaryOperationEvaluator::EvaluateOperands( Number*& leftNumber, Number*& rightNumber, Environment& environment )
{
	bool success = false;

	leftNumber = 0;
	rightNumber = 0;

	do
	{
		if( !leftOperand )
		{
			environment.AddError( "Binary operator has no left operand." );
			break;
		}

		if( !rightOperand )
		{
			environment.AddError( "Binary operator has no right operand." );
			break;
		}

		// Call upon the environment to create the types of numbers we'll be working with.
		leftNumber = environment.CreateNumber( this );
		rightNumber = environment.CreateNumber( this );
		if( !( leftNumber && rightNumber ) )
		{
			environment.AddError( "Failed to create numbers from environment for binary operation." );
			break;
		}
		
		// Evaluate our left and right operands.
		if( !leftOperand->EvaluateResult( *leftNumber, environment ) )
		{
			environment.AddError( "Failed to evaluate left operand of binary operator." );
			break;
		}
		if( !rightOperand->EvaluateResult( *rightNumber, environment ) )
		{
			environment.AddError( "Failed to evaluate right operand of binary operator." );
			break;
		}

		success = true;
	}
	while( false );

	if( !success )
	{
		delete leftNumber;
		delete rightNumber;
		leftNumber = 0;
		rightNumber = 0;
	}

	return success;
}
Exemplo n.º 2
0
//=========================================================================================
void TaylorSeriesFunctionEvaluator::Center( const Number* number, Environment& environment )
{
	if( center )
		delete center;
	center = environment.CreateNumber(0);
	center->AssignFrom( number, environment );
}
Exemplo n.º 3
0
//=========================================================================================
/*virtual*/ bool InverseFunctionEvaluator::EvaluateResult( Number& result, Environment& environment )
{
	bool success = false;
	Number* argumentResult = 0;

	do
	{
		FunctionArgumentEvaluator* argument = GetArgument(0);
		if( !argument )
		{
			environment.AddError( "The inverse function expects an argument." );
			break;
		}

		argumentResult = environment.CreateNumber( argument );
		if( !argument->EvaluateResult( *argumentResult, environment ) )
			break;

		if( !result.IsTypeOf( MultivectorNumber::ClassName() ) )
			break;
		
		if( !result.AssignMultilicativeInverse( argumentResult, environment ) )
		{
			environment.AddError( "Failed to take the inverse!" );
			break;
		}

		success = true;
	}
	while( false );

	delete argumentResult;

	return success;
}
Exemplo n.º 4
0
//=========================================================================================
// It is very important that we evaluate the arguments from left to right, because
// this is the expected behavior of the language.
bool FunctionEvaluator::EvaluateArguments( Number**& numberArray, int& numberArraySize, Environment& environment )
{
	bool success = false;

	do
	{
		// Some functions don't take any arguments.
		// If this one does, then go evaluate those arguments.
		numberArray = 0;
		numberArraySize = listOfArguments.Count();
		if( numberArraySize > 0 )
		{
			numberArray = new Number*[ numberArraySize ];
			memset( numberArray, 0, numberArraySize * sizeof( Number* ) );

			// Go populate the number array with the argument list evaluation results.
			FunctionArgumentEvaluator* evaluator = ( FunctionArgumentEvaluator* )listOfArguments.LeftMost();
			int index;
			for( index = 0; index < numberArraySize; index++ )
			{
				if( !evaluator )
					break;
				Number* number = environment.CreateNumber( this );
				numberArray[ index ] = number;
				if( !evaluator->EvaluateResult( *number, environment ) )
					break;
				evaluator = ( FunctionArgumentEvaluator* )evaluator->Right();
			}
			if( index < numberArraySize )
				break;
		}

		success = true;
	}
	while( false );

	// It's all or nothing.  If we failed, don't return anything.
	if( !success )
		DeleteArguments( numberArray, numberArraySize );

	return success;
}
Exemplo n.º 5
0
//=========================================================================================
bool UnaryOperationEvaluator::EvaluateOperand( Number*& number, Environment& environment )
{
	bool success = false;

	do
	{
		if( !operand )
		{
			environment.AddError( "Unary operator has no argument." );
			break;
		}

		// Call upon the environment to create the type of number we'll be working with.
		number = environment.CreateNumber( operand );
		if( !number )
		{
			environment.AddError( "Failed to create number from environment for unary operator." );
			break;
		}

		// Evaluate our operand.
		if( !operand->EvaluateResult( *number, environment ) )
		{
			environment.AddError( "Unary operand operand evaluation failed." );
			break;
		}

		success = true;
	}
	while( false );

	if( !success )
	{
		delete number;
		number = 0;
	}

	return success;
}