Initial checkin. Mostly complete implementation of UDF 2.01 physical partitions.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5231 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/file_systems/udf/PhysicalPartition.cpp

@@ -0,0 +1,36 @@
+#include "PhysicalPartition.h"
+
+#define B_NOT_IMPLEMENTED B_ERROR
+
+using namespace Udf;
+
+/*! \brief Creates a new PhysicalPartition object.
+*/
+PhysicalPartition::PhysicalPartition(uint16 number, uint32 start, uint32 length)
+	: fNumber(number)
+	, fStart(start)
+	, fLength(length)
+{
+}
+
+/*! \brief Destroys the PhysicalPartition object.
+*/
+PhysicalPartition::~PhysicalPartition()
+{
+}
+
+/*! \brief Maps the given logical block to a physical block on disc.
+
+	The given logical block is simply treated as an offset from the
+	start of the physical partition.
+*/
+status_t
+PhysicalPartition::MapBlock(uint32 logicalBlock, uint32 &physicalBlock)
+{
+	if (logicalBlock >= fLength)
+		return B_BAD_ADDRESS;
+	else {
+		physicalBlock = fStart + logicalBlock;
+		return B_OK;
+	}
+}

src/add-ons/kernel/file_systems/udf/PhysicalPartition.h

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+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//
+//  Copyright (c) 2003 Tyler Dauwalder, [email protected]
+//---------------------------------------------------------------------
+#ifndef _UDF_PHYSICAL_PARTITION_H
+#define _UDF_PHYSICAL_PARTITION_H
+
+/*! \file PhysicalPartition.h
+*/
+
+#include <kernel_cpp.h>
+
+#include "Partition.h"
+#include "UdfDebug.h"
+
+namespace Udf {
+
+/*! \brief Standard type 1 physical partition
+
+	PhysicalPartitions map logical block numbers directly to physical
+	block numbers.
+
+	See also: ECMA-167 10.7.2
+*/
+class PhysicalPartition : public Partition {
+public:
+	PhysicalPartition(uint16 number, uint32 start, uint32 length);
+	virtual ~PhysicalPartition();
+	virtual status_t MapBlock(uint32 logicalBlock, uint32 &physicalBlock);
+
+	uint16 Number() const { return fNumber; }
+	uint32 Start() const { return fStart; }
+	uint32 Length() const { return fLength; }
+private:
+	uint16 fNumber;
+	uint32 fStart;
+	uint32 fLength;
+};
+
+};	// namespace Udf
+
+#endif	// _UDF_PHYSICAL_PARTITION_H