Implement MxAtomId and reference counter (stl set) (#109)

* Implement MxAtomId and reference counter (stl set)
* Partial success in hiding 4786 warning spam.
* Build out most of MxOmni::Destroy since it also touches the set

* Add some size asserts

LEGO1/mxatomid.cpp

@@ -1,20 +1,97 @@
 #include "mxatomid.h"
+#include "mxomni.h"
 
 // OFFSET: LEGO1 0x100acf90
-MxAtomId::MxAtomId(const char *, LookupMode)
+MxAtomId::MxAtomId(const char *p_str, LookupMode p_mode)
 {
-  // TODO
+  if (!MxOmni::GetInstance())
+    return;
+
+  if (!AtomIdCounterSet())
+    return;
+
+  MxAtomIdCounter *counter = GetCounter(p_str, p_mode);
+  m_internal = counter->GetKey()->GetData();
+  counter->Inc();
 }
 
 // OFFSET: LEGO1 0x100acfd0
 MxAtomId::~MxAtomId()
 {
-  // TODO
+  Destroy();
+}
+
+// OFFSET: LEGO1 0x100acfe0
+void MxAtomId::Destroy()
+{
+  if (!m_internal)
+    return;
+
+  if (!MxOmni::GetInstance())
+    return;
+
+  if (!AtomIdCounterSet())
+    return;
+
+  // The dtor is called on the counter object immediately,
+  // so this syntax should be correct.
+  MxAtomIdCounterSet::iterator it = AtomIdCounterSet()->find(
+    &MxAtomIdCounter(m_internal)
+  );
+  
+  MxAtomIdCounter *counter = (MxAtomIdCounter*)(*it);
+  counter->Dec();
 }
 
 // OFFSET: LEGO1 0x100ad1c0
-MxAtomId &MxAtomId::operator=(const MxAtomId &id)
+MxAtomId &MxAtomId::operator=(const MxAtomId &p_atomId)
 {
-  // TODO
+  if (m_internal)
+    Destroy();
+
+  if (p_atomId.m_internal && MxOmni::GetInstance() && AtomIdCounterSet()) {
+    MxAtomIdCounter *counter = GetCounter(p_atomId.m_internal, LookupMode_Exact);
+    counter->Inc();
+  }
+
+  m_internal = p_atomId.m_internal;
+
   return *this;
 }
+
+// OFFSET: LEGO1 0x100ad210
+MxAtomIdCounter* MxAtomId::GetCounter(const char *p_str, LookupMode p_mode)
+{
+  MxAtomId _unused;
+  MxAtomIdCounter *counter = new MxAtomIdCounter(p_str);
+
+  switch (p_mode) {
+    case LookupMode_LowerCase:
+    case LookupMode_LowerCase2:
+      counter->GetKey()->ToLowerCase();
+      break;
+    case LookupMode_UpperCase:
+      counter->GetKey()->ToUpperCase();
+      break;
+  }
+
+  MxAtomIdCounterSet::iterator it = AtomIdCounterSet()->find(counter);
+  if (it != AtomIdCounterSet()->end()) {
+    // Counter already in the set. Delete temp value and return it.
+    delete counter;
+    counter = *it;
+  } else {
+    // Counter is not in the set. Add it.
+    AtomIdCounterSet()->insert(counter);
+  }
+
+  return counter;
+}
+
+// OFFSET: LEGO1 0x100ad7e0
+void MxAtomId::Clear()
+{
+  // Reset but do not delete MxAtomId object.
+  Destroy();
+  m_internal = NULL;
+}