implemented List_increaseCapacity_size

src/collections/List.c

@@ -14,19 +14,28 @@ List_ List_copy(const List_ src){
     return copy;
 }
 
-void* List_expand_size(List_* self, u32 size_to_add){
+void List_increaseCapacity_size(List_* self, u32 size_to_add){
     u32 occupied_size = self->size;
-    u32 expanded_alloc_size = self->allocated_size;
-    if(expanded_alloc_size == 0)
-        expanded_alloc_size = 64;
-    self->size += size_to_add;
-    while(self->size > expanded_alloc_size){
-        expanded_alloc_size *= 2;
+    u32 expanded_size = occupied_size + size_to_add;
+    
+    if(self->allocated_size < expanded_size) {
+        u32 expanded_alloc_size = self->allocated_size;
+        if(expanded_alloc_size == 0)
+            expanded_alloc_size = 32;
+        while(expanded_alloc_size < expanded_size){
+            expanded_alloc_size *= 2;
+        }
+        // if self->data is null, realloc acts like malloc
+        self->data = realloc(self->data, expanded_alloc_size);
+        self->allocated_size = expanded_alloc_size;
     }
-    // if self->data is null, realloc acts like malloc
-    self->data = realloc(self->data, expanded_alloc_size);
-    self->allocated_size = expanded_alloc_size;
-    return (u8*)(self->data) + occupied_size;
+}
+
+void* List_expand_size(List_* self, u32 size_to_add){
+    List_increaseCapacity_size(self, size_to_add);
+    u8* empty_cell_ptr = (u8*)self->data + self->size;
+    self->size += size_to_add;
+    return empty_cell_ptr;
 }
 
 void List_push_size(List_* self, void* values, u32 size){