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"Complete" PA08 for processing.

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This commit is contained in:
Charles Descamps 2023-11-05 11:25:45 -07:00
parent 9c24cee2df
commit ba683c4f44
2 changed files with 34 additions and 20 deletions
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54
PA08-1101/RedBlackTreeUtility.c
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@ -340,22 +340,23 @@ RedBlackNodeType *insert(RedBlackNodeType *treeRoot, char inData)
{
// use insertHelper to get to where the data needs to go
insertedNode = insertHelper(treeRoot, inData);
// print out what data is being added, tell user being resolved
printf("\nInserting %c and resolving\n", inData);
// use resolveRBT to get the tree balanced correctly
resolveRBT(&treeRoot, insertedNode);
if(insertedNode != NULL)
{
// print out what data is being added, tell user being resolved
printf("\nInserting %c and resolving\n", inData);
// use resolveRBT to get the tree balanced correctly
resolveRBT(&treeRoot, insertedNode);
}
}
else
{
// if inserting the root node
// set the root with createNodeFromData, node is black.
treeRoot = createNodeFromData(inData, BLACK);
// tell the user inserting the data
printf("\nInserting %c and resolving\n", inData);
// tell the user that the root was set, and is black.
printf(" - Root color set to black\n");
/* AN ALTERNATIVE COULD BE TO INSTEAD
USE THE RESOLVE FUNCTION INSTEAD OF DOING IT BY HAND*/
printf(" - Root color set to black\n");
// set the root with createNodeFromData, node is black.
return createNodeFromData(inData, BLACK);
}
// return treeRoot
return treeRoot;
@ -446,7 +447,7 @@ Dependencies: printf, rotateLeft, rotateRight, swapColors,
*/
void resolveRBT(RedBlackNodeType **treeRoot, RedBlackNodeType *wkgPtr)
{
printf("\nAttempting to Resolve RBT\n");
// printf("\nAttempting to Resolve RBT\n");
// declare parPtr, grndParPtr, unclePtr, grtGrndPtr
RedBlackNodeType *wkgParentPtr;
RedBlackNodeType *wkgGrandParentPtr;
@ -455,19 +456,19 @@ void resolveRBT(RedBlackNodeType **treeRoot, RedBlackNodeType *wkgPtr)
// check for parent and grandparent exists
if(wkgPtr->parentPtr != NULL && wkgPtr->parentPtr->parentPtr != NULL)
{
printf("\nStarting resolution process.\n");
// printf("\nStarting resolution process.\n");
// set all my relatives, will need to know which child I am
wkgParentPtr = wkgPtr->parentPtr;
wkgGrandParentPtr = wkgParentPtr->parentPtr;
if (wkgParentPtr->leftChildPtr == wkgPtr)
if (wkgGrandParentPtr->leftChildPtr == wkgPtr)
{
// set the uncle pointer to the parent's right child
wkgUnclePtr = wkgParentPtr->rightChildPtr;
// set the uncle pointer to the grandparent's right child
wkgUnclePtr = wkgGrandParentPtr->rightChildPtr;
}
else
{
// set the uncle pointer to the parent's left child
wkgUnclePtr = wkgParentPtr->leftChildPtr;
// set the uncle pointer to the grandparent's left child
wkgUnclePtr = wkgGrandParentPtr->leftChildPtr;
}
wkgGreatGrandParentPtr = wkgGrandParentPtr->parentPtr;
// check for red uncle
@ -478,6 +479,9 @@ void resolveRBT(RedBlackNodeType **treeRoot, RedBlackNodeType *wkgPtr)
wkgUnclePtr->color = BLACK;
// change grandparent to red
wkgGrandParentPtr->color = RED;
// print out parent and uncle are red.
printf(" - Parent is red\n");
printf(" - Uncle is red\n");
// recurse with the grandparent
resolveRBT(treeRoot, wkgGrandParentPtr);
}
@ -490,17 +494,22 @@ void resolveRBT(RedBlackNodeType **treeRoot, RedBlackNodeType *wkgPtr)
// check for child is left of parent (Left Left case)
if(wkgParentPtr->leftChildPtr == wkgPtr)
{
printf("\nLL Case, rotate right\n");
// printf("\nLL Case, rotate right\n");
// use rotate right with grandparent(old) and parent(new)
rotateRight(wkgGrandParentPtr, wkgParentPtr);
// link the parent to grandparent's parent
wkgPtr->parentPtr = wkgGrandParentPtr->parentPtr;
// swap colors called with parent and grandparent
swapColors(wkgParentPtr, wkgGrandParentPtr);
}
// check for child is right of parent (Left Right case)
else
{
printf("\nLR Case, rotate right, recurse\n");
// printf("\nLR Case, rotate right, recurse\n");
// use rotate right with parent(old) and createdNode(new)
rotateRight(wkgParentPtr, wkgPtr);
// call resolveRBT with parent as createdNode (will treat as LLC)
resolveRBT(treeRoot, wkgParentPtr);
}
}
// check for parent is right of grandparent
@ -509,17 +518,22 @@ void resolveRBT(RedBlackNodeType **treeRoot, RedBlackNodeType *wkgPtr)
// check for child is right of parent (Right Right case)
if(wkgParentPtr->rightChildPtr == wkgPtr)
{
printf("\nRR Case, rotate left\n");
// printf("\nRR Case, rotate left\n");
// use rotate left with grandparent(old) and parent(new)
rotateLeft(wkgGrandParentPtr, wkgParentPtr);
// link the parent to grandparent's parent
wkgPtr->parentPtr = wkgGrandParentPtr->parentPtr;
// swap colors called with parent and grandparent
swapColors(wkgParentPtr, wkgGrandParentPtr);
}
// check for child is left of parent (Right Left case)
else
{
printf("\nRL Case, rotate left, recurse\n");
// printf("\nRL Case, rotate left, recurse\n");
// use rotate left with parent(old) and createdNode(new)
rotateLeft(wkgParentPtr, wkgPtr);
// call resolveRBT with parent as createdNode (will treat as RRC)
resolveRBT(treeRoot, wkgParentPtr);
}
}
}