makefile verändert

bintree.c

@@ -12,57 +12,7 @@
 // if isDuplicate is NULL, otherwise ignores duplicates and sets isDuplicate to 1 (or to 0 if a new entry is added).
 TreeNode *addToTree(TreeNode *root, const void *data, size_t dataSize, CompareFctType compareFct, int *isDuplicate)
 {
-    if (isDuplicate)
-        *isDuplicate = 0;
 
-    // Wenn kein Knoten angelegt
-    if (root == NULL)
-    {
-        // Neuen Knoten erstellen
-        TreeNode *newNode = malloc(sizeof(TreeNode));
-        if (!newNode)
-            return NULL;
-        // mit Daten füllen
-        newNode->data = malloc(dataSize);
-        if (!(newNode->data))
-        {
-            free(newNode);
-            return NULL;
-        }
-
-        memcpy(newNode->data, data, dataSize);
-        newNode->left = NULL; // Kinder NULL setzen
-        newNode->right = NULL;
-        return newNode;
-    }
-    // auf Doppellungen überprüfen, daten/werte vergelichen
-    // int cmp = compareFct(data, root->data);
-
-    int cmp = compareFct(data, root->data);
-
-    if (cmp == 0) // Duplikat erkannt
-    {
-        if (isDuplicate) // nicht einfügen
-        {
-            *isDuplicate = 1;
-            return root;
-        }
-        else // einfügen erlaubt
-        {
-            root->right = addToTree(root->right, data, dataSize, compareFct, NULL);
-            return root;
-        }
-    }
-    // kein Duplikat
-    if (cmp < 0)
-    {
-        root->left = addToTree(root->left, data, dataSize, compareFct, isDuplicate);
-    }
-    else if (cmp > 0)
-    {
-        root->right = addToTree(root->right, data, dataSize, compareFct, isDuplicate);
-    }
-    return root;
 }
 
 // Iterates over the tree given by root. Follows the usage of strtok. If tree is NULL, the next entry of the last tree given is returned in ordering direction.
@@ -70,64 +20,17 @@ TreeNode *addToTree(TreeNode *root, const void *data, size_t dataSize, CompareFc
 // push the top node and push all its left nodes.
 void *nextTreeData(TreeNode *root)
 {
-    static StackNode *stack = NULL; // Stack für Iterator
-    static TreeNode *lastRoot = NULL;
-    TreeNode *currentNode;
 
-    if (root != NULL) // Initialisierung bei erstem Aufruf
-    {
-        lastRoot = root;
-
-        if (stack)
-        {
-            freeStack(stack);
-            stack = NULL;
-        }
-
-        stack = createStack();
-
-        // alle linken Knoten vom Wurzelknoten pushen
-        currentNode = root;
-        while (currentNode)
-        {
-            push(stack, currentNode);
-            currentNode = currentNode->left;
-        }
-    }
-    // Stack ist leer, keine Daten mehr
-    if (!stack || isEmpty(stack))
-        return NULL;
-
-    TreeNode *newNode = pop(stack); // nächster Knoten
-
-    // Wenn rechter Teilbaum vorhanden → alle linken Knoten pushen
-    currentNode = newNode->right;
-    while (currentNode)
-    {
-        push(stack, currentNode);
-        currentNode = currentNode->left;
-    }
-    return newNode->data; // Daten zurückgeben
 }
 
 // Releases all memory resources (including data copies).
 void clearTree(TreeNode *root)
 {
-    if (root)
+
-    {
-        clearTree(root->left);
-        clearTree(root->right);
-        free(root->data);
-        free(root);
-    }
 }
 
 // Returns the number of entries in the tree given by root.
 unsigned int treeSize(const TreeNode *root)
 {
-    unsigned int size = 0;
+
-    if (root == NULL)
-        return 0;
-    size = 1 + treeSize(root->left) + treeSize(root->right);
-    return size;
 }

highscores.txt

@@ -1,2 +1 @@
 player1;3999
-player_name;3993

makefile

@@ -35,8 +35,10 @@ $(program_obj_filesobj_files): %.o: %.c
 # --------------------------
 # Unit Tests
 # --------------------------
-unitTests:
+unitTestsStack: stack.o test_stack.c $(unityfolder)/unity.c
-	echo "needs to be implemented"
+	$(CC) $(FLAGS) -I$(unityfolder) $^ -o $@
+
+
 
 # --------------------------
 # Clean

stack.c

@@ -10,24 +10,54 @@
 // Pushes data as pointer onto the stack.
 StackNode *push(StackNode *stack, void *data)
 {
+    // Neues Stack-Element erstellen
+    StackNode *newNode = malloc(sizeof(StackNode));
+    if (!newNode) {
+        return stack; // oder NULL, je nach Fehlerstrategie
+    }
 
+    
+    newNode->data = data;
+    newNode->next = stack; // bisheriger Stack wird nach unten geschoben
+
+    return newNode; // neuer Kopf des Stacks
 }
 
 // Deletes the top element of the stack (latest added element) and releases its memory. (Pointer to data has to be
 // freed by caller.)
 StackNode *pop(StackNode *stack)
 {
+   if (stack == NULL)
+        return NULL;
 
+    StackNode *newTop = stack->next;
+
+    // Daten gehen verloren!
+    // Caller KANN sie nicht freigeben.
+    free(stack);
+
+    return newTop;
 }
 
 // Returns the data of the top element.
 void *top(StackNode *stack)
 {
+    if (stack == NULL)
+        return NULL;   // kein Element im Stack
 
+    return stack->data;
 }
 
 // Clears stack and releases all memory.
 void clearStack(StackNode *stack)
 {
+    StackNode *current = stack;
+
+    while (current != NULL) 
+    {
+        StackNode *next = current->next;
+        free(current);
+        current = next;
+    }
 
 }

stack.h

@@ -12,6 +12,7 @@ typedef struct Node {
     void *data;
     struct Node *next;
 } StackNode;
+
 // Pushes data as pointer onto the stack.
 StackNode *push(StackNode *stack, void *data);
 

test_stack.c

@@ -0,0 +1,78 @@
+#include <stdlib.h>
+#include "stack.h"
+#include "unity.h"
+
+void test_push_and_top(void);
+
+void test_pop(void);
+
+void test_clearStack(void);
+
+void setUp(void) {}
+
+void tearDown(void) {}
+
+
+int main(void)
+{
+    UNITY_BEGIN();
+
+    RUN_TEST(test_push_and_top);
+    RUN_TEST(test_pop);
+    RUN_TEST(test_clearStack);
+
+    return UNITY_END();
+}
+
+
+void test_push_and_top(void)
+{
+    StackNode *stack = NULL;
+
+    int a = 10;
+    int b = 20;
+    int c = 30;
+
+    stack = push(stack, &a);
+    stack = push(stack, &b);
+    stack = push(stack, &c);
+
+    TEST_ASSERT_EQUAL_INT(30, *(int*)top(stack));
+
+    clearStack(stack);
+    TEST_ASSERT_NULL(stack);
+}
+
+void test_pop(void)
+{
+    StackNode *stack = NULL;
+
+    int x = 111;
+    int y = 222;
+
+    stack = push(stack, &x);
+    stack = push(stack, &y);
+
+    // pop removes y
+    stack = pop(stack);
+    TEST_ASSERT_EQUAL_INT(111, *(int*)top(stack));
+
+    // pop removes x
+    stack = pop(stack);
+    TEST_ASSERT_NULL(stack);
+}
+
+void test_clearStack(void)
+{
+    StackNode *stack = NULL;
+
+    int x = 5;
+    int y = 6;
+
+    stack = push(stack, &x);
+    stack = push(stack, &y);
+
+    clearStack(stack);
+
+    TEST_ASSERT_NULL(stack);
+}