school/cs235/lab05/irdeque.cpp

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2016-04-06 20:46:10 -07:00
#include "irdeque.h"
bool irdeque::addToIRDequeLeft(int id) {
if(in_irdeque(id)) {
return false;
}
l.insertHead(id);
return true;
}
bool irdeque::removeFromIRDequeLeft() {
int id = l.at(l.size() - 1);
l.remove(id);
return true;
}
bool irdeque::removeFromIRDequeRight() {
int id = l.at(0);
l.remove(id);
return false;
}
int irdeque::showTopOfIRDequeLeft() {
if(l.size() == 0) {
return -1;
}
int left = l.at(l.size() - 1);
return left;
}
int irdeque::showTopOfIRDequeRight() {
if(l.size() == 0) {
return -1;
}
int right = l.at(0);
return right;
}
int irdeque::showSizeOfIRDeque() {
return l.size();
}
bool irdeque::in_irdeque(int id) {
node* node_ptr = l.head;
while(node_ptr != NULL) {
if(node_ptr->id == id) {
return true;
}
node_ptr = node_ptr->next;
}
return false;
}