ENH: start xcode stuff

Source/cmXCodeObject.h

@@ -0,0 +1,49 @@
+#include "cmStandardIncludes.h"
+
+class cmXCodeObject
+{
+public:
+  enum Type { OBJECT_LIST, ATTRIBUTE_GROUP, OBJECT_REF, OBJECT };
+  enum PBXType { PBXGroup, PBXBuildStyle, PBXProject, PBXHeadersBuildPhase, 
+                 PBXSourcesBuildPhase, PBXFrameworksBuildPhase, PBXNativeTarget,
+                 PBXFileReference, PBXBuildFile, PBXContainerItemProxy, PBXTargetDependency,
+                 PBXShellScriptBuildPhase, PBXResourcesBuildPhase, PBXApplicationReference,
+                 PBXExecutableFileReference, PBXLibraryReference, PBXToolTarget, PBXLibraryTarget,
+                 None
+  };
+  static const char* PBXTypeNames[];
+  
+  cmXCodeObject(PBXType ptype, Type type);
+  void AddAttribute(const char* name, const char* value)
+    {
+      m_StringAttributes[name] = value;
+    }
+  void AddAttribute(const char* name, cmXCodeObject* value)
+    {
+      m_ObjectAttributes[name] = value;
+    }
+  
+  void SetObject(cmXCodeObject* value)
+    {
+      m_Object = value;
+    }
+  void AddObject(cmXCodeObject* value)
+    {
+      m_List.push_back(value);
+    }
+  void Indent(int level, std::ostream& out);
+  void Print(std::ostream& out);
+  static void PrintAll(std::ostream& out);
+  const char* GetId()
+    {
+      return m_Id.c_str();
+    }
+  Type m_Type;
+  cmStdString m_Id;
+  PBXType m_IsA;
+  cmXCodeObject* m_Object;
+  std::vector<cmXCodeObject*> m_List;
+  std::map<cmStdString, cmXCodeObject*> m_ObjectAttributes;
+  std::map<cmStdString, cmStdString> m_StringAttributes;
+  static std::vector<cmXCodeObject*> s_AllObjects;
+};