public void PushStacks() {
_floatFrameStack.push(new floatStack());
_intFrameStack.push(new intStack());
_boolFrameStack.push(new booleanStack());
_codeFrameStack.push(new ObjectStack());
_nameFrameStack.push(new ObjectStack());
AssignStacksFromFrame();
}
public int ExecuteInstruction(Object inObject) {
if (inObject instanceof Program) {
Program p = (Program) inObject;
if (_useFrames) {
_execStack.push("frame.pop");
}
p.PushAllReverse(_execStack);
if (_useFrames) {
_execStack.push("frame.push");
}
return 0;
}
if (inObject instanceof Integer) {
_intStack.push((Integer) inObject);
return 0;
}
if (inObject instanceof Number) {
_floatStack.push(((Number) inObject).floatValue());
return 0;
}
if (inObject instanceof Instruction) {
((Instruction) inObject).Execute(this);
return 0;
}
if (inObject instanceof String) {
Instruction i = _instructions.get(inObject);
if (i != null) {
i.Execute(this);
} else {
_nameStack.push(inObject);
}
return 0;
}
return -1;
}
public void PopFrame() {
if (_useFrames) {
boolean boolTop = _boolStack.top();
int intTop = _intStack.top();
float floatTop = _floatStack.top();
Object nameTop = _nameStack.top();
Object codeTop = _codeStack.top();
PopStacks();
_floatStack.push(floatTop);
_intStack.push(intTop);
_boolStack.push(boolTop);
if (nameTop != null) _nameStack.push(nameTop);
if (codeTop != null) _codeStack.push(codeTop);
}
}
public void PushAllReverse(ObjectStack inOther) {
for (int n = _size - 1; n >= 0; n--) inOther.push(_stack[n]);
}
/**
* Loads a Push program into the interpreter's exec and code stacks.
*
* @param inProgram The program to load.
*/
public void LoadProgram(Program inProgram) {
_codeStack.push(inProgram);
_execStack.push(inProgram);
}
