private void PushCommand(Command comm)
{
CommandStack.Push(comm);
}
/// <summary>
/// Push new Command for evaluation in stack.
/// </summary>
/// <param name="inOperation">Operation to evaluate.</param>
/// <param name="inLeftOperand">Left operand.</param>
/// <param name="requiredCellMemory">Memory Cell in StackMemory, that stores needed value.</param>
public void PushCommand(String inOperation, int requiredCellMemory, int inLeftOperand)
{
freeMemory(requiredCellMemory);
int currEmptyCellMemory = GetUnusedMemoryCell();
Command currCommand = new Command(inOperation, requiredCellMemory, inLeftOperand, currEmptyCellMemory);
commandStack.Push(currCommand);
}
/// <summary>
/// Push new Command for evaluation in stack
/// </summary>
/// <param name="inOperation">Operation to evaluate.</param>
/// <param name="inLeftOperand">Left operand.</param>
/// <param name="inRightOperand">Right operand.</param>
public void PushCommand(String inOperation, String inLeftOperand, String inRightOperand)
{
int currEmptyCellMemory = GetUnusedMemoryCell();
Command currCommand = new Command(inOperation, inLeftOperand, inRightOperand, currEmptyCellMemory);
commandStack.Push(currCommand);
}
/// <summary>
/// Function converts stack with two-address instruction commands into pbStack with one-address instruction commands.
/// </summary>
/// <returns>Stack with one-address instruction commands.</returns>
public Stack<Command> populateStack()
{
Stack<Command> returnVal = new Stack<Command>();
Stack<Command> tempStack ;
Command loadCommand;
Command OperationCommand;
Command SaveCommand;
foreach (Command currCommand in CommandStack)
{
if (currCommand.leftOperand == null)
{
if (currCommand.rightOperand == null)
{
// if Right points direct to value and Left operand stores in MemoryCell
// Save result to Memory Cell
// KOP |MEM |M{#}|
SaveCommand = new Command(CommandBase.commVals.Mem, currCommand.MemoryCellUsed);
returnVal.Push(SaveCommand);
// Load Right operand and Evaluate Operation
// KOP |OP |RO|
OperationCommand = new Command((CommandBase.commVals)currCommand.Code, currCommand.MemoryCellNeededExtra, true);
returnVal.Push(OperationCommand);
// Load left operand
// KOP |LOAD |M{#}|
loadCommand = new Command(CommandBase.commVals.Load, currCommand.MemoryCellNeeded);
returnVal.Push(loadCommand);
}
else
{
// if Right points direct to value and Left operand stores in MemoryCell
// Save result to Memory Cell
// KOP |MEM |M{#}|
SaveCommand = new Command(CommandBase.commVals.Mem, currCommand.MemoryCellUsed);
returnVal.Push(SaveCommand);
// Load Right operand and Evaluate Operation
// KOP |OP |RO|
OperationCommand = new Command((CommandBase.commVals)currCommand.Code, currCommand.MemoryCellNeeded);
returnVal.Push(OperationCommand);
// Load left operand
// KOP |LOAD |M{#}|
loadCommand = new Command(CommandBase.commVals.Load, currCommand.MemoryCellNeeded);
returnVal.Push(loadCommand);
}
}
else
if (currCommand.rightOperand == null)
{
// if Left points direct to value and Right operand stores in MemoryCell
// Save result to Memory Cell
// KOP |MEM |M{#}|
SaveCommand = new Command(CommandBase.commVals.Mem, currCommand.MemoryCellUsed);
returnVal.Push(SaveCommand);
// Load Right operand and Evaluate Operation
// KOP |OP |M{#}|
OperationCommand = new Command((CommandBase.commVals)currCommand.Code, currCommand.MemoryCellNeeded);
returnVal.Push(OperationCommand);
// Load left operand
// KOP |LOAD |LO|
loadCommand = new Command(CommandBase.commVals.Load, currCommand.leftOperand);
returnVal.Push(loadCommand);
}
else
{
// if Left and Right Operands are points direct to their values.
// Save result to Memory Cell
// KOP |MEM |M{#}|
SaveCommand = new Command(CommandBase.commVals.Mem, currCommand.MemoryCellUsed);
returnVal.Push(SaveCommand);
// Load Right operand and Evaluate Operation
// KOP |OP |RO|
OperationCommand = new Command((CommandBase.commVals)currCommand.Code, currCommand.rightOperand);
returnVal.Push(OperationCommand);
// Load left operand
// KOP |LOAD |LO|
loadCommand = new Command(CommandBase.commVals.Load, currCommand.leftOperand);
returnVal.Push(loadCommand);
}
}// foreach
//tempStack = new Stack<Command>(returnVal);
//return tempStack;
return returnVal;
}
