Added FindDescendant() and _IsShadow().

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3978 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/storage/Partition.h

@@ -60,6 +60,7 @@ public:
 	BPartition *Parent() const;
 	BPartition *ChildAt(int32 index) const;
 	int32 CountChildren() const;
+	BPartition *FindDescendant(partition_id id) const;
 
 	status_t GetPartitioningInfo(BPartitioningInfo *info) const;
 	
@@ -132,6 +133,8 @@ private:
 					user_partition_data *data);
 	void _Unset();
 
+	bool _IsShadow() const;
+
 	int32 _Level() const;
 	virtual bool _AcceptVisitor(BDiskDeviceVisitor *visitor, int32 level);
 	BPartition *_VisitEachDescendant(BDiskDeviceVisitor *visitor,

src/kits/storage/Partition.cpp

@@ -8,6 +8,7 @@
 #include <Partition.h>
 
 #include <DiskDevice.h>
+#include <DiskDevicePrivate.h>
 #include <DiskDeviceVisitor.h>
 #include <Message.h>
 #include <Volume.h>
@@ -358,6 +359,14 @@ BPartition::CountChildren() const
 	return (fPartitionData ? fPartitionData->child_count : 0);
 }
 
+// FindDescendant
+BPartition *
+BPartition::FindDescendant(partition_id id) const
+{
+	IDFinderVisitor visitor(id);
+	return const_cast<BPartition*>(this)->VisitEachDescendant(&visitor);
+}
+
 // GetPartitioningInfo
 status_t
 BPartition::GetPartitioningInfo(BPartitioningInfo *info) const
@@ -435,6 +444,13 @@ BPartition::_Unset()
 	fPartitionData = NULL;
 }
 
+// _IsShadow
+bool
+BPartition::_IsShadow() const
+{
+	return (fPartitionData && fPartitionData->shadow_id >= 0);
+}
+
 // _Level
 int32
 BPartition::_Level() const