GraphApp: Use a FunctionStore

Change-Id: Ib75947c40167489726fafc493ccb0ebf2862142b

apps/graph/function_store.cpp

@@ -0,0 +1,23 @@
+#include "function_store.h"
+extern "C" {
+#include <assert.h>
+}
+
+Graph::FunctionStore::FunctionStore() :
+  m_numberOfFunctions(0)
+{
+}
+
+Graph::Function * Graph::FunctionStore::functionAtIndex(int i) {
+  assert(i>=0 && i<m_numberOfFunctions);
+  return &m_functions[i];
+}
+
+void Graph::FunctionStore::pushFunction(const char * functionText) {
+  assert(m_numberOfFunctions < k_maxNumberOfFunctions);
+  m_functions[m_numberOfFunctions++] = Function(functionText);
+}
+
+int Graph::FunctionStore::numberOfFunctions() {
+  return m_numberOfFunctions;
+}