separate preprocessor directives into smaller libraries

src/includes.h

@@ -0,0 +1,32 @@
+/*
+    TVM is a virtual machine for LC-3 based operating systems and it is used for educational purposes.
+    Copyright (c) under MIT license
+    Written by Erick Ahmed, 2022
+*/
+
+/* List of all the libraries needed to run tyvm.c */
+
+//#define __UNIX        // uncomment ONLY if compiling for unix-based operative system
+
+/* universal libraries */
+    #include <stdint.h>
+    #include <stdio.h>
+    #include <signal.h>
+
+/* unix only libraries */
+#ifdef __UNIX
+    #include <stdlib.h>
+    #include <string.h>
+    #include <unistd.h>
+    #include <fcntl.h>
+
+    /* sys libraries */
+    #include <sys/time.h>
+    #include <sys/types.h>
+    #include <sys/termios.h>
+    #include <sys/mman.h>
+/* windows only libraries */
+#else
+    #include <Windows.h>
+    #include <conio.h>
+#endif