mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
239 lines
3.7 KiB
239 lines
3.7 KiB
/*++
|
|
|
|
Copyright (c) 1990 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
easet.hxx
|
|
|
|
Abstract:
|
|
|
|
This class models an EA set.
|
|
|
|
Notes:
|
|
|
|
There are minor alignment problems here.
|
|
|
|
--*/
|
|
|
|
#if !defined(EA_SET_DEFN)
|
|
|
|
#define EA_SET_DEFN
|
|
|
|
#include "cluster.hxx"
|
|
|
|
#if defined ( _AUTOCHECK_ ) || defined( _EFICHECK_ )
|
|
#define UFAT_EXPORT
|
|
#elif defined ( _UFAT_MEMBER_ )
|
|
#define UFAT_EXPORT __declspec(dllexport)
|
|
#else
|
|
#define UFAT_EXPORT __declspec(dllimport)
|
|
#endif
|
|
|
|
//
|
|
// Forward references
|
|
//
|
|
|
|
DECLARE_CLASS( EA_SET );
|
|
DECLARE_CLASS( FAT );
|
|
DECLARE_CLASS( FAT_SA );
|
|
DECLARE_CLASS( LOG_IO_DP_DRIVE );
|
|
DECLARE_CLASS( MEM );
|
|
|
|
|
|
struct _EA_HDR {
|
|
USHORT Signature;
|
|
USHORT OwnHandle;
|
|
ULONG NeedCount;
|
|
UCHAR OwnerFileName[14];
|
|
ULONG Reserved;
|
|
LONG TotalSize;
|
|
};
|
|
|
|
DEFINE_TYPE( struct _EA_HDR, EA_HDR );
|
|
|
|
struct _PACKED_EA_HDR {
|
|
USHORT Signature;
|
|
USHORT OwnHandle;
|
|
ULONG NeedCount;
|
|
UCHAR OwnerFileName[14];
|
|
UCHAR Reserved[4];
|
|
UCHAR TotalSize[4];
|
|
};
|
|
|
|
DEFINE_TYPE( struct _PACKED_EA_HDR, PACKED_EA_HDR );
|
|
|
|
const SizeOfEaHdr = 30; // sizeof returns 32.
|
|
|
|
struct _EA {
|
|
UCHAR Flag;
|
|
UCHAR NameSize;
|
|
UCHAR ValueSize[2]; // Was USHORT.
|
|
CHAR Name[1];
|
|
};
|
|
|
|
DEFINE_TYPE( struct _EA, EA );
|
|
|
|
CONST USHORT EaSetSignature = 0x4145;
|
|
CONST UCHAR NeedFlag = 0x80;
|
|
|
|
|
|
class EA_SET : public CLUSTER_CHAIN {
|
|
|
|
public:
|
|
|
|
UFAT_EXPORT
|
|
DECLARE_CONSTRUCTOR( EA_SET );
|
|
|
|
VIRTUAL
|
|
UFAT_EXPORT
|
|
~EA_SET(
|
|
);
|
|
|
|
NONVIRTUAL
|
|
UFAT_EXPORT
|
|
BOOLEAN
|
|
Initialize(
|
|
IN OUT PMEM Mem,
|
|
IN OUT PLOG_IO_DP_DRIVE Drive,
|
|
IN PFAT_SA FatSuperArea,
|
|
IN PCFAT Fat,
|
|
IN ULONG ClusterNumber,
|
|
IN ULONG LengthOfChain DEFAULT 0
|
|
);
|
|
|
|
NONVIRTUAL
|
|
UFAT_EXPORT
|
|
BOOLEAN
|
|
Read(
|
|
);
|
|
|
|
NONVIRTUAL
|
|
BOOLEAN
|
|
Write(
|
|
);
|
|
|
|
NONVIRTUAL
|
|
PEA_HDR
|
|
GetEaSetHeader(
|
|
);
|
|
|
|
NONVIRTUAL
|
|
UFAT_EXPORT
|
|
PEA
|
|
GetEa(
|
|
IN ULONG Index,
|
|
OUT PLONG EaSize DEFAULT NULL,
|
|
OUT PBOOLEAN PossiblyMore DEFAULT NULL
|
|
);
|
|
|
|
NONVIRTUAL
|
|
BOOLEAN
|
|
VerifySignature(
|
|
) CONST;
|
|
|
|
private:
|
|
|
|
NONVIRTUAL
|
|
VOID
|
|
Construct(
|
|
);
|
|
|
|
NONVIRTUAL
|
|
VOID
|
|
Destroy(
|
|
);
|
|
|
|
NONVIRTUAL
|
|
BOOLEAN
|
|
PackEaHeader(
|
|
);
|
|
|
|
NONVIRTUAL
|
|
BOOLEAN
|
|
UnPackEaHeader(
|
|
);
|
|
|
|
EA_HDR _eahdr;
|
|
LONG _size;
|
|
BOOLEAN _size_imposed;
|
|
PEA _current_ea;
|
|
ULONG _current_index;
|
|
|
|
};
|
|
|
|
INLINE
|
|
BOOLEAN
|
|
EA_SET::Write(
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine packs the ea header and then writes the cluster chain to disk.
|
|
|
|
Arguments:
|
|
|
|
None.
|
|
|
|
Return Value:
|
|
|
|
FALSE - Failure.
|
|
TRUE - Success.
|
|
|
|
--*/
|
|
{
|
|
return PackEaHeader() && CLUSTER_CHAIN::Write();
|
|
}
|
|
|
|
|
|
INLINE
|
|
PEA_HDR
|
|
EA_SET::GetEaSetHeader(
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine returns a pointer to the unpacked ea set header.
|
|
|
|
Arguments:
|
|
|
|
None.
|
|
|
|
Return Value:
|
|
|
|
A pointer to the unpacked ea set header.
|
|
|
|
--*/
|
|
{
|
|
return &_eahdr;
|
|
}
|
|
|
|
|
|
INLINE
|
|
BOOLEAN
|
|
EA_SET::VerifySignature(
|
|
) CONST
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine verifies the signature on the EA set.
|
|
|
|
Arguments:
|
|
|
|
None.
|
|
|
|
Return Value:
|
|
|
|
FALSE - The signature is invalid.
|
|
TRUE - The signature is valid.
|
|
|
|
--*/
|
|
{
|
|
return _eahdr.Signature == EaSetSignature;
|
|
}
|
|
|
|
|
|
#endif // EA_SET_DEFN
|