Added GUI Frame

src/util/string.h

@@ -5,6 +5,7 @@
 
 #pragma once
 #include <dawn/dawn.h>
+#include "array.h"
 
 /**
  * Replaces handlebars within the string with items from the list of variables.
@@ -21,4 +22,24 @@
  */
 int32_t stringHandlebarsBuffer(char *source,
   stringhandlebarvariable_t *variables, int32_t variableCount, char *buffer
-);
+);
+
+/**
+ * Initializes a string stack for pushing strings on to.
+ * @param stack Stack to initialize.
+ */
+void stringStackInit(stringstack_t *stack);
+
+/**
+ * Push a string onto the stack. The source string will be copied so you can
+ * change the original pointer after this push operation.
+ * @param stack Stack to push onto.
+ * @param string String to copy and push.
+ */
+void stringStackPush(stringstack_t *stack, char *string);
+
+/**
+ * Pop an element off the end of a string stack.
+ * @param stack Stack to pop from.
+ */
+void stringStackPop(stringstack_t *stack);