"Finished" PA06

+- LLDataEngine.c
+- PA06_Main
+- QueueUtility.c

PA06-1018/LLDataEngine.c

@@ -172,7 +172,23 @@ Dependencies: deepCopyData, setItemToEmpty
 bool getItemAtIndex( StateDataType *returnVal,
                                    const StateLLType stateData, int listIndex )
 {
-    // return false (temp)
+    int llIncrementer = 0;
+    StateDataType *currentPtr = stateData.headPtr;
+    // while through linked list
+    while(!listIsEmpty(stateData) && currentPtr != NULL)
+    {
+        // look for listIndex
+        if(listIndex == llIncrementer)
+        {
+            // if found, return true, copy data into return
+            deepCopyData(returnVal, currentPtr);
+            return true;
+        }
+        llIncrementer = llIncrementer + 1;
+    }
+    // since not found, return empty value in returnVal.
+    setItemToEmpty(returnVal);
+    // return false since not found, or not within bounds.
     return false;
 }
 
@@ -221,7 +237,60 @@ Dependencies: privateCreateNodeFromNode
 bool insertItemAtIndex( StateLLType *stateData, 
                                   StateDataType toBeInserted, int insertIndex )
 {
-    // return false (temp)
+    int llIncrementer = 0;
+    StateDataType *currentPtr = stateData->headPtr;
+    StateDataType *insertedNode;
+    // while through linked list
+    while(!listIsEmpty(*stateData) && currentPtr != NULL)
+    {
+        // checks within middle of list
+        if(insertIndex == llIncrementer)
+        {
+            // if found, return true, insert data
+            // create node given toBeInserted
+            insertedNode = privateCreateNodeFromNode(toBeInserted);
+            // move the node's nextPtr to currentPtr->nextPtr
+            currentPtr->nextPtr = insertedNode->nextPtr;
+            // move the currentPtr's nextPtr to the node
+            currentPtr = insertedNode;
+            return true;
+        }
+        llIncrementer = llIncrementer + 1;
+    }
+    // need a check for beginning of list
+    if(insertIndex == 0)
+    {
+        if(stateData->headPtr == NULL)
+        {
+            // if at beginning of list, but no more data
+            // create node given toBeInserted
+            insertedNode = privateCreateNodeFromNode(toBeInserted);
+            // move the headPtr to node
+            stateData->headPtr = insertedNode;
+            return true;
+        }
+        // if at beginning of list, if more data in list
+        // create node given toBeInserted
+        insertedNode = privateCreateNodeFromNode(toBeInserted);
+        // need to point the headPtr->nextPtr to the node's nextPtr
+        stateData->headPtr->nextPtr = insertedNode->nextPtr;
+        // move the headPtr to node
+        stateData->headPtr = insertedNode;
+        return true;
+    }
+    // put the end of list check out here?
+    if(insertIndex == getListSize(*stateData))
+    {
+        // if found, return true, append data
+        // create node given toBeInserted
+        insertedNode = privateCreateNodeFromNode(toBeInserted);
+        // move the node's nextPtr to NULL
+        insertedNode->nextPtr = NULL;
+        // move the currentPtr's nextPtr to the node
+        currentPtr = insertedNode;
+        return true;
+    }
+    // return false since not inserted, or not within bounds.
     return false;
 }
 
@@ -356,7 +425,60 @@ Dependencies: deepCopyData, free, setItemToEmpty
 bool removeItemAtIndex( StateLLType *stateData, 
                                   StateDataType *removedItem, int removeIndex )
 {
-    // return false (temp)
+    int llIncrementer = 0;
+    StateDataType *currentPtr = stateData->headPtr;
+    // while through linked list
+    while(!listIsEmpty(*stateData) && currentPtr != NULL)
+    {
+        // checks within middle of list
+        if(removeIndex == llIncrementer)
+        {
+            // if found, return true, insert data
+            // copy data out of the list
+            deepCopyData(removedItem, currentPtr);
+            // move the pointer of currentPtr to the next item
+            currentPtr->nextPtr = currentPtr->nextPtr->nextPtr;
+            // free the memory of the removed item.
+            free(currentPtr->nextPtr);
+            return true;
+        }
+        llIncrementer = llIncrementer + 1;
+    }
+    // need a check for beginning of list
+    if(removeIndex == 0)
+    {
+        if(stateData->headPtr == NULL)
+        {
+            // if at beginning of list, but no more data
+            // copy data out of the list
+            deepCopyData(removedItem, currentPtr);
+            // free the memory of the removed item.
+            free(currentPtr->nextPtr);
+            return true;
+        }
+        // if at beginning of list, if more data in list
+        // copy data out of the list
+        deepCopyData(removedItem, currentPtr);
+        // move the pointer of currentPtr to the next item
+        currentPtr->nextPtr = currentPtr->nextPtr->nextPtr;
+        // free the memory of the removed item.
+        free(currentPtr->nextPtr);
+        return true;
+    }
+    // put the end of list check out here?
+    if(removeIndex == getListSize(*stateData))
+    {
+        // if found, return true, append data
+        // copy data out of the list
+        deepCopyData(removedItem, currentPtr);
+        // move the pointer of currentPtr to the next item
+        currentPtr->nextPtr = currentPtr->nextPtr->nextPtr;
+        // free the memory of the removed item.
+        free(currentPtr->nextPtr);
+        return true;
+    }
+    setItemToEmpty(removedItem);
+    // return false since not inserted, or not within bounds.
     return false;
 }