test_stack mit &

.gitignore

@@ -1 +1,3 @@
-highscores.txt
+doble_initial.exe
+*.o
+*.exe

highscores.txt

@@ -1 +1,2 @@
+krisp;4986
 player1;3999

makefile

@@ -29,21 +29,27 @@ program_obj_files = stack.o bintree.o numbers.o timer.o highscore.o
 doble : main.o $(program_obj_files)
 	$(CC) $(FLAGS) $^ -o doble
 
-$(program_obj_filesobj_files): %.o: %.c
+$(program_obj_files): %.o: %.c
 	$(CC) -c $(FLAGS) $^ -o $@
 
 # --------------------------
 # Unit Tests
 # --------------------------
-unitTests:
-	echo "needs to be implemented"
+
+TEST_BIN = runTests
+
+unitTests: stack.o test_stack.o
+	$(CC) $(FLAGS) -I$(unityfolder) -o $(TEST_BIN) stack.o test_stack.o $(unityfolder)/unity.c
+
+test_stack.o: test_stack.c
+	$(CC) $(FLAGS) -I$(unityfolder) -c test_stack.c -o test_stack.o
 
 # --------------------------
 # Clean
 # --------------------------
 clean:
 ifeq ($(OS),Windows_NT)
-	del /f *.o doble
-else
 	rm -f *.o doble
+else
+	del /f *.o doble
 endif

stack.c

@@ -1,33 +1,82 @@
-#include <stdlib.h>
 #include "stack.h"
+#include <stdio.h>
+#include <stdlib.h>
 
-//TODO: grundlegende Stackfunktionen implementieren:
-/*  * `push`: legt ein Element oben auf den Stack,
+/*typedef struct {
+
+  void *data;
+  struct StackNode *next;
+
+} StackNode;*/
+
+// TODO: grundlegende Stackfunktionen implementieren:
+/* `push`: legt ein Element oben auf den Stack,
  * `pop`: entfernt das oberste Element,
  * `top`: liefert das oberste Element zurück,
  * `clearStack`: gibt den gesamten Speicher frei. */
 
-// Pushes data as pointer onto the stack.
-StackNode *push(StackNode *stack, void *data)
-{
+// [A] -> [B] -> [C] -> NULL
+// head -> stack.next
 
+StackNode *createNode(void *data) {
+
+  StackNode *node = malloc(sizeof(StackNode));
+
+  if (node == NULL)
+    return NULL;
+
+  node->data = data;
+  node->next = NULL;
+  node->prev = NULL;
+
+  return node;
 }
 
-// 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)
-{
+// Pushes data as pointer onto the stack.
+StackNode *push(StackNode *stack, void *data) {
 
+  StackNode *newNode = createNode(data);
+
+  if (newNode == NULL) {
+    return stack;
+  }
+
+  newNode->next = stack;
+  if (stack != NULL) {
+    stack->prev = newNode;
+  }
+
+  return newNode;
+}
+
+// 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 *nextNode = stack->next;
+  if (nextNode != NULL) {
+    nextNode->prev = NULL;
+  }
+
+  free(stack);
+
+  stack = NULL;
+
+  return nextNode;
 }
 
 // Returns the data of the top element.
-void *top(StackNode *stack)
-{
-
-}
+void *top(StackNode *stack) { return stack ? stack->data : NULL; }
 
 // Clears stack and releases all memory.
-void clearStack(StackNode *stack)
-{
+void clearStack(StackNode **stack) {
 
+  while (*stack != NULL) {
+    StackNode *next = (*stack)->next;
+    free(*stack);
+    *stack = next;
+  }
 }

stack.h

@@ -1,25 +1,35 @@
 #ifndef STACK_H
 #define STACK_H
 
-/* A stack is a special type of queue which uses the LIFO (last in, first out) principle. 
-This means that with each new element all other elements are pushed deeper into the stack. 
-The latest element is taken from the stack. */
+/* A stack is a special type of queue which uses the LIFO (last in, first out)
+principle. This means that with each new element all other elements are pushed
+deeper into the stack. The latest element is taken from the stack. */
 
 #include <stdlib.h>
 
-//TODO: passenden Datentyp als struct anlegen
+// TODO: passenden Datentyp als struct anlegen
+
+typedef struct StackNode {
+
+  void *data;
+  struct StackNode *next;
+  struct StackNode *prev;
+
+} StackNode;
+
+StackNode *createNode(void *data);
 
 // Pushes data as pointer onto the stack.
 StackNode *push(StackNode *stack, void *data);
 
-// Deletes the top element of the stack (latest added element) and releases its memory. (Pointer to data has to be
-// freed by caller.)
+// 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);
 
 // Returns the data of the top element.
 void *top(StackNode *stack);
 
 // Clears stack and releases all memory.
-void clearStack(StackNode *stack);
+void clearStack(StackNode **stack);
 
 #endif

test_stack.c

@@ -0,0 +1,57 @@
+#include "unity.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "stack.h"
+
+void test_createNode(void) {
+
+  int testInt = 26;
+  StackNode *testNode = createNode(&testInt);
+
+  TEST_ASSERT_NOT_NULL(testNode);
+  TEST_ASSERT_EQUAL_PTR(&testInt, testNode->data);
+  TEST_ASSERT_NULL(testNode->next);
+  TEST_ASSERT_NULL(testNode->prev);
+
+  free(testNode);
+}
+
+void test_pushDataToStack(void) {}
+
+void test_deleteTopElement(void) {}
+
+void test_returnData(void) {}
+
+void test_clearStack(void) {
+  int testInts[] = {1, 2, 3, 4, 5};
+  StackNode *stack = NULL;
+
+  for (int i = 0; i < 5; i++) {
+    stack = push(stack, &testInts[i]);
+  }
+
+  clearStack(&stack);
+
+  TEST_ASSERT_NULL(stack);
+}
+
+void setUp(void) {}
+void tearDown(void) {}
+
+int main(void) {
+
+  UNITY_BEGIN();
+
+  printf("------------------------stack test------------------------\n");
+
+  RUN_TEST(test_createNode);
+  RUN_TEST(test_pushDataToStack);
+  RUN_TEST(test_deleteTopElement);
+  RUN_TEST(test_returnData);
+  RUN_TEST(test_clearStack);
+  RUN_TEST(test_clearStack);
+
+  return UNITY_END();
+}