197 lines
3 KiB
C++
197 lines
3 KiB
C++
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/*++
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Copyright (c) 1990 Microsoft Corporation
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Module Name:
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rootdir.hxx
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Abstract:
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This class is an implementation of FATDIR for the FAT root directory.
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--*/
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#if !defined(ROOTDIR_DEFN)
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#define ROOTDIR_DEFN
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#include "drive.hxx"
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#include "fatdir.hxx"
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#include "mem.hxx"
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#include "secrun.hxx"
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#if defined ( _AUTOCHECK_ ) || defined( _EFICHECK_ )
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#define UFAT_EXPORT
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#elif defined ( _UFAT_MEMBER_ )
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#define UFAT_EXPORT __declspec(dllexport)
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#else
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#define UFAT_EXPORT __declspec(dllimport)
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#endif
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DECLARE_CLASS( ROOTDIR );
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class ROOTDIR : public FATDIR {
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public:
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UFAT_EXPORT
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DECLARE_CONSTRUCTOR( ROOTDIR );
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UFAT_EXPORT
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VIRTUAL
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~ROOTDIR(
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);
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NONVIRTUAL
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UFAT_EXPORT
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BOOLEAN
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Initialize(
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IN PMEM Mem,
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IN OUT PLOG_IO_DP_DRIVE Drive,
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IN LBN StartingSector,
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IN LONG NumberOfEntries
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);
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NONVIRTUAL
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BOOLEAN
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Read(
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);
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NONVIRTUAL
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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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GetDirEntry(
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IN LONG EntryNumber
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);
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NONVIRTUAL
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LONG
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QueryNumberOfEntries(
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);
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private:
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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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SECRUN _secrun;
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LONG _number_of_entries;
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};
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INLINE
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BOOLEAN
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ROOTDIR::Read(
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)
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/*++
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Routine Description:
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This routine reads the directory in from the disk.
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Arguments:
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None.
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Return Value:
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FALSE - Failure.
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TRUE - Success.
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--*/
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{
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return _secrun.Read();
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}
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INLINE
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BOOLEAN
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ROOTDIR::Write(
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)
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/*++
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Routine Description:
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This routine writes the drirectory to the disk.
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Arguments:
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None.
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Return Value:
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FALSE - Failure.
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TRUE - Success.
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--*/
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{
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return _secrun.Write();
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}
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INLINE
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PVOID
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ROOTDIR::GetDirEntry(
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IN LONG EntryNumber
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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 requested
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directory entry. The data may then be interpreted with a fat
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directory entry object. The return value will be NULL if a request
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for a directory entry is beyond the size of the directory.
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Arguments:
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EntryNumber - The desired entry number. The entries will be numbered
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0, 1, 2, ... , n-1.
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Return Value:
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A pointer to the beginning of a directory entry or NULL.
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--*/
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{
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return (EntryNumber < _number_of_entries) ?
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(PCHAR) _secrun.GetBuf() + BytesPerDirent*EntryNumber : NULL;
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}
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INLINE
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LONG
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ROOTDIR::QueryNumberOfEntries(
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)
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/*++
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Routine Description:
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This routine returns the number of entries in the directory.
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Arguments:
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None.
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Return Value:
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The number of entries in the directory.
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--*/
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{
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return _number_of_entries;
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}
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#endif // ROOTDIR_DEFN
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