clear() no longer creates a new set of memory, just sets the values to 0

src/main.c

@@ -5,6 +5,35 @@
  * Vector Library For C
  */
 
+/*
+ * All functions needed
+ * Ones that start with '>' I have completed
+ *
+ * > at()	Returns an indexed element from a vector
+ * > back()	Returns the last element of a vector
+ * > begin()	Returns an iterator pointing to the beginning of a vector
+ * > capacity()	Returns the number of elements that a vector's reserved memory
+ * is able to store > front()	Returns the first element of a vector > end()
+ * Returns an iterator pointing to the end of a vector > push_back()	Adds an
+ * element to the end of a vector > size()	Returns the number of elements
+ * in a vector
+ *
+ * assign()	Fills a vector with multiple values
+ * clear()	Removes all of the contents of a vector
+ * data() Returns a pointer to the block of memory where a vector's elements are
+ * stored empty()	Checks whether a vector is empty or not erase()	Removes
+ * a number of elements from a vector insert()	Inserts a number of elements
+ * into a vector max_size()	Returns the maximum number of elements that a
+ * vector can have pop_back()	Removes the last element of a vector rbegin()
+ * Returns a reverse iterator pointing to the last element of a vector rend()
+ * Returns a reverse iterator pointing to a position right before the first
+ * element of a vector reserve()	Reserves memory for a vector resize()
+ * Changes the size of a vector, adding or removing elements if necessary
+ * shrink_to_fit()	Reduces the reseved memory of a vector if necessary to
+ * exactly fit the number of elements swap()	Swaps the contents of one vector
+ * with another
+ * */
+
 /*
  * Types Wanted:
  *      Char
@@ -36,24 +65,13 @@ typedef struct
 	size_t capacity;
 } Vec8_t;
 
-/* Takes in a temporary cpy of a vec
- * - Can be nullptr to not have size incrementation and have a size of 0 (Create
- * an empty vector)
- *
- * - Can be a vec to have size incrementation and size of base vec + 1 (Create a
- * vector for modifying an old vector)
- *
- * */
+#define CAPACITY 1024
+
 Vec8_t
 create(const Vec8_t* input)
 {
-	Vec8_t vec = { .arr = nullptr, .size = 0, .capacity = 4 };
-	if (input == nullptr)
-	{
-		vec.arr = calloc(vec.capacity, sizeof(char));
-		return vec;
-	}
-	if (input->size > 0)
+	Vec8_t vec = { .arr = nullptr, .size = 0, .capacity = CAPACITY };
+	if (input != nullptr && input->size > 0)
 	{
 		vec.size = input->size + 1;
 	}
@@ -71,6 +89,19 @@ delete(Vec8_t* vec)
 	vec->arr = nullptr;
 }
 
+Vec8_t
+clear(Vec8_t* vec)
+{
+	if (vec != nullptr && vec->capacity > 0)
+	{
+                for(int i = 0; i < vec->size; i++) {
+                        if(!vec->arr) continue;
+                        vec->arr[i] = 0;
+                }
+	}
+        return *vec;
+}
+
 char
 at(const Vec8_t* vec, const int idx)
 {
@@ -149,9 +180,11 @@ add_back(Vec8_t* vec, const char val)
 	{
 		vec->capacity *= 2;
 		char* nvec = reallocf(vec->arr, vec->capacity * sizeof(char));
-                if(nvec == NULL) {
+		if (nvec == NULL)
+		{
 			return *vec;
 		}
+		vec->arr = nvec;
 	}
 	vec->arr[vec->size] = val;
 	vec->size++;
@@ -166,9 +199,12 @@ main()
 	vec = add_back(&vec, '4');
 	vec = add_back(&vec, '5');
 	vec = add_back(&vec, '6');
-	print_vec(&vec);
-	// vec = add_back(&vec, '6');
-	// vec = add_front(&vec, 'c');
+	vec = add_back(&vec, '8');
+	vec = add_back(&vec, '6');
+        clear(&vec);
+        for(int i = 0; i < vec.size; i++) {
+                printf("%i\n", at(&vec, i));
+        }
 	// print_vec(&vec);
 	//        printf("%c", at(nullptr, 0));