241 lines
3.4 KiB
C++
241 lines
3.4 KiB
C++
/*++
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Copyright (c) 1990 Microsoft Corporation
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Module Name:
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secrun.hxx
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Abstract:
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This class models a run of sectors. It is able to read in a run of
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sectors into memory and write a run of sectors in memory onto disk.
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Author:
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Norbert P. Kusters (norbertk) 26-Nov-90
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--*/
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#if !defined(SECRUN_DEFN)
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#define SECRUN_DEFN
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#include "drive.hxx"
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#include "mem.hxx"
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#if defined ( _AUTOCHECK_ )
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#define IFSUTIL_EXPORT
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#elif defined ( _IFSUTIL_MEMBER_ )
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#define IFSUTIL_EXPORT __declspec(dllexport)
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#else
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#define IFSUTIL_EXPORT __declspec(dllimport)
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#endif
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DECLARE_CLASS( SECRUN );
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class SECRUN : public OBJECT {
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public:
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IFSUTIL_EXPORT
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DECLARE_CONSTRUCTOR( SECRUN );
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VIRTUAL
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IFSUTIL_EXPORT
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~SECRUN(
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);
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NONVIRTUAL
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IFSUTIL_EXPORT
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BOOLEAN
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Initialize(
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IN OUT PMEM Mem,
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IN OUT PIO_DP_DRIVE Drive,
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IN BIG_INT StartSector,
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IN SECTORCOUNT NumSectors
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);
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NONVIRTUAL
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VOID
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Relocate(
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IN BIG_INT NewStartSector
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);
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VIRTUAL
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IFSUTIL_EXPORT
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BOOLEAN
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Read(
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);
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VIRTUAL
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IFSUTIL_EXPORT
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BOOLEAN
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Write(
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);
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NONVIRTUAL
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PVOID
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GetBuf(
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);
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NONVIRTUAL
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BIG_INT
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QueryStartSector(
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) CONST;
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NONVIRTUAL
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LBN
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QueryStartLbn(
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) CONST;
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NONVIRTUAL
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SECTORCOUNT
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QueryLength(
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) CONST;
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private:
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NONVIRTUAL
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VOID
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Construct (
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);
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NONVIRTUAL
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VOID
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Destroy(
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);
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PVOID _buf;
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PIO_DP_DRIVE _drive;
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BIG_INT _start_sector;
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SECTORCOUNT _num_sectors;
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};
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INLINE
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VOID
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SECRUN::Relocate(
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IN BIG_INT NewStartSector
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)
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/*++
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Routine Description:
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This routine relocates the secrun.
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Arguments:
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NewStartSector - Supplies the new starting sector.
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Return Value:
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None.
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--*/
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{
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_start_sector = NewStartSector;
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}
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INLINE
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PVOID
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SECRUN::GetBuf(
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)
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/*++
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Routine Description:
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This routine returns a pointer to the beginning of the read/write
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buffer.
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Arguments:
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None.
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Return Value:
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A pointer to a read/write buffer.
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--*/
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{
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return _buf;
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}
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INLINE
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BIG_INT
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SECRUN::QueryStartSector(
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) CONST
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/*++
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Routine Description:
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This routine returns the starting sector number for the run of sectors.
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Arguments:
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None.
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Return Value:
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The starting sector number for the run of sectors.
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--*/
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{
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return _start_sector;
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}
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INLINE
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LBN
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SECRUN::QueryStartLbn(
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) CONST
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/*++
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Routine Description:
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This routine returns the starting LBN for the run of sectors.
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Arguments:
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None.
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Return Value:
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The starting LBN for the run of sectors.
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--*/
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{
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DebugAssert(_start_sector.GetHighPart() == 0);
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return _start_sector.GetLowPart();
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}
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INLINE
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SECTORCOUNT
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SECRUN::QueryLength(
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) CONST
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/*++
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Routine Description:
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This routine computes the number of sectors in this sector run.
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Arguments:
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None.
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Return Value:
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The number of sectors in this sector run.
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--*/
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{
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return _num_sectors;
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}
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#endif // SECRUN_DEFN
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