[apps/shared] Add method in shared function store

Change-Id: I1b15ed95e7e9a5c4cffe303e5f699ec03ad87b45

apps/graph/function_store.cpp

@@ -60,6 +60,10 @@ void FunctionStore::removeFunction(Shared::Function * f) {
   }
 }
 
+int FunctionStore::maxNumberOfFunctions() {
+  return k_maxNumberOfFunctions;
+}
+
 const char *  FunctionStore::firstAvailableName() {
   for (int k = 0; k < k_maxNumberOfFunctions; k++) {
     int j = 0;

apps/graph/function_store.h

@@ -16,6 +16,7 @@ public:
   Function * definedFunctionAtIndex(int i) override;
   Function * addEmptyFunction() override;
   void removeFunction(Shared::Function * f) override;
+  int maxNumberOfFunctions() override;
   static constexpr int k_maxNumberOfFunctions = 8;
 private:
   const char * firstAvailableName() override;

apps/sequence/sequence_store.cpp

@@ -52,6 +52,10 @@ void SequenceStore::removeFunction(Shared::Function * f) {
   }
 }
 
+int SequenceStore::maxNumberOfFunctions() {
+  return k_maxNumberOfSequences;
+}
+
 const char *  SequenceStore::firstAvailableName() {
   for (int k = 0; k < k_maxNumberOfSequences; k++) {
     int j = 0;

apps/sequence/sequence_store.h

@@ -16,6 +16,7 @@ public:
   Sequence * definedFunctionAtIndex(int i) override;
   Sequence * addEmptyFunction() override;
   void removeFunction(Shared::Function * f) override;
+  int maxNumberOfFunctions() override;
   static constexpr int k_maxNumberOfSequences = 3;
 private:
   const char * firstAvailableName() override;

apps/shared/function_store.h

@@ -23,6 +23,7 @@ public:
   int numberOfDefinedFunctions();
   // An active function must be defined to be counted
   int numberOfActiveFunctions();
+  virtual int maxNumberOfFunctions() = 0;
 protected:
   int m_numberOfFunctions;
 private: