Merged r366:387 from the jbeder-event-api branch

src/aliasmanager.cpp

@@ -0,0 +1,45 @@
+#include "aliasmanager.h"
+#include "node.h"
+#include <cassert>
+#include <sstream>
+
+namespace YAML
+{
+	AliasManager::AliasManager(): m_curAnchor(0)
+	{
+	}
+
+	void AliasManager::RegisterReference(const Node& node)
+	{
+		const Node *pIdentity = node.Identity();
+		m_newIdentityByOldIdentity.insert(std::make_pair(pIdentity, &node));
+		m_anchorByIdentity.insert(std::make_pair(&node, _CreateNewAnchor()));
+	}
+	
+	const Node *AliasManager::LookupReference(const Node& node) const
+	{
+		const Node *pIdentity = node.Identity();
+		return _LookupReference(*pIdentity);
+	}
+	
+	anchor_t AliasManager::LookupAnchor(const Node& node) const
+	{
+		AnchorByIdentity::const_iterator it = m_anchorByIdentity.find(&node);
+		if(it == m_anchorByIdentity.end())
+			assert(false); // TODO: throw
+		return it->second;
+	}
+
+	const Node *AliasManager::_LookupReference(const Node& oldIdentity) const
+	{
+		NodeByNode::const_iterator it = m_newIdentityByOldIdentity.find(&oldIdentity);
+		if(it == m_newIdentityByOldIdentity.end())
+			return 0;
+		return it->second;
+	}
+	
+	anchor_t AliasManager::_CreateNewAnchor()
+	{
+		return ++m_curAnchor;
+	}
+}