beginning drafting of tcp server

inc/util.hpp

@@ -1,13 +1,18 @@
 #pragma once
 
+#include <cstdlib>
 #include <stdio.h>
 
+typedef unsigned int uint;
+
 template<class T> struct array {
     T* data;
     size_t len;
+    size_t cap;
     inline T& operator[](int i) { return data[i]; }
 };
 
-typedef unsigned int uint;
-
+template<class T> void append(array<T>& a, T el);
+template<class T> T pop(array<T>& a);
+template<class T> void resize(array<T>& a, size_t new_size);
 bool read_file(array<char>* out, const char* filepath);