add header guards and two new functions to modify the stored data.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@723 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/media/TMap.h

@@ -1,3 +1,5 @@
+#ifndef _MEDIA_T_MAP_H
+#define _MEDIA_T_MAP_H
 
 template<class key, class value> class Map
 {
@@ -13,7 +15,7 @@ public:
 		list[count].v = v;
 		count++;
 	}
-	
+
 	bool Get(const key &k, value *v)
 	{
 		for (int i = 0; i < count; i++)
@@ -33,6 +35,25 @@ public:
 		return true;
 	}
 	
+	bool GetPointer(const key &k, value **v)
+	{
+		for (int i = 0; i < count; i++)
+			if (list[i].k == k) {
+				*v = &(list[i].v);
+				return true;
+			}
+		return false;
+	}
+	
+	// you can't Remove() while iterating through the map using GetAt()
+	bool GetPointerAt(int32 index, value **v)
+	{
+		if (index < 0 || index >= count) 
+			return false;
+		*v = &(list[index].v);
+		return true;
+	}
+	
 	// you can't Remove() while iterating through the map using GetAt()
 	bool Remove(const key &k) 
 	{
@@ -58,3 +79,4 @@ private:
 	int count;
 };
 
+#endif // _MEDIA_T_MAP_H