ByteCode.cpp

//constructor------------------------------------------------------









void ByteCode::assign (int type, int index , float value){
	if( type == INT){
		int val = (int) value;
		printf("ldc %d\n", val);
		cout<<"istore  "<<index<<endl;
	}else if(type == FLOAT){
		printf("ldc %f\n", value);
		cout<<"istore  "<<index<<endl;
	}
}

void ByteCode::arithmticOperation(int type1, int operation, int index1 , int index2, int index3){
	if(operation == 0 ){
		if(type1 == INT){
			cout<<"iload  "<<index2<<endl;
			cout<<"iload  "<<index3<<endl;
			cout<<"iadd"<<endl;
			cout<<"istore  "<<index1;
		}else if(type1 ==  FLOAT){
			cout<<"fload  "<<index2<<endl;
			cout<<"fload  "<<index3<<endl;
			cout<<"fadd"<<endl;
			cout<<"fstore  "<<index1;
		}
	}else if(operation == 1 ){
		if(type1 == INT){
			cout<<"iload  "<<index2<<endl;
			cout<<"iload  "<<index3<<endl;
			cout<<"isub"<<endl;
			cout<<"istore  "<<index1;
		}else if(type1 ==  FLOAT){
			cout<<"fload  "<<index2<<endl;
			cout<<"fload  "<<index3<<endl;
			cout<<"fsub"<<endl;
			cout<<"fstore  "<<index1;
		}
	}else if(operation == 2 ){
		if(type1 == INT){
			cout<<"iload  "<<index2<<endl;
			cout<<"iload  "<<index3<<endl;
			cout<<"imul"<<endl;
			cout<<"istore  "<<index1;
		}else if(type1 ==  FLOAT){
			cout<<"fload  "<<index2<<endl;
			cout<<"fload  "<<index3<<endl;
			cout<<"fmul"<<endl;
			cout<<"fstore  "<<index1;
		}
	}else {
		if(type1 == INT){
			cout<<"iload  "<<index2<<endl;
			cout<<"iload  "<<index3<<endl;
			cout<<"idiv"<<endl;
			cout<<"istore  "<<index1;
		}else if(type1 ==  FLOAT){
			cout<<"fload  "<<index2<<endl;
			cout<<"fload  "<<index3<<endl;
			cout<<"fdiv"<<endl;
			cout<<"fstore  "<<index1;
		}
	}
}

//called at the begining of if statement.
void ByteCode::beginIf(bool boolean){
	string newLabel = getLabel();

	if(boolean ==true){
		cout<<"ldc  1"<<endl;
		cout<<"ifeq  "<<newLabel<<endl;
	}else{
		//if(false)
		cout<<"ldc  0"<<endl;
		cout<<"ifeq  "<<newLabel<<endl;
	}
}


//called at the begining of else.
void ByteCode::beginElse(){
	string prevLabel = stack.pop();
	string newLabel= getLabel();
	cout<<"goto  "<<newLabel<<endl;
	cout<<prevLabel<<":"<<endl;
}

//called when if and (else) hava finished.
void ByteCode::endIF(){
	string prevLabel = stack.pop();
	cout<<prevLabel<<":"<<endl;
}

void ByteCode::beginWhile(bool boolean){
	string newLabel = getLabel();
	if(boolean =true){
		cout<<"ldc  1"<<endl;
		cout<<"ifeq  "<<newLabel<<endl;
	}else{
		//if(false)
		cout<<"ldc  0"<<endl;
		cout<<"ifeq  "<<newLabel<<endl;
	}
}


void ByteCode::endWhile(){
	string prevLabel = stack.pop();
	cout<<prevLabel<<":"<<endl;
}

string ByteCode::getLabel(){
	string newLabel = label;
	label++;
	stack.push(newLabel);
	return newLabel;
}