356 lines
8.1 KiB
C++
356 lines
8.1 KiB
C++
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 1992.
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//
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// File: header.hxx
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//
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// Contents: MSF header class
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//
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// Classes: CMSFHeader
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//
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// History: 11-Dec-91 PhilipLa Created.
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// 24-Apr-92 AlexT Added data and acccess routines
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// for minifat, ministream.
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//
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//--------------------------------------------------------------------------
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#ifndef __HEADER_HXX__
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#define __HEADER_HXX__
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#include <storagep.h>
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#define HDR_NOFORCE 0x0000
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#define HDR_FORCE 0x0001
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#define HDR_ALL 0x0002
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struct SPreHeader : public SStorageFile
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{
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public:
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USHORT _uMinorVersion;
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USHORT _uDllVersion;
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USHORT _uByteOrder;
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USHORT _uSectorShift;
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USHORT _uMiniSectorShift;
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USHORT _usReserved;
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ULONG _ulReserved1;
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FSINDEX _csectDir; // valid only for >512b sectors
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FSINDEX _csectFat;
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SECT _sectDirStart;
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DFSIGNATURE _signature;
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ULONG _ulMiniSectorCutoff;
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SECT _sectMiniFatStart;
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FSINDEX _csectMiniFat;
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SECT _sectDifStart;
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FSINDEX _csectDif;
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};
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const USHORT CSECTFATREAL = (HEADERSIZE - sizeof(SPreHeader)) / sizeof(SECT);
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const USHORT CSECTFAT = CSECTFATREAL;
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class CMSFHeaderData: public SPreHeader
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{
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public:
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CMSFHeaderData(USHORT uSectorShift);
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SECT _sectFat[CSECTFAT];
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};
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class CMSFHeader
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{
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public:
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CMSFHeader(USHORT uSectorShift);
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SCODE Validate(VOID) const;
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inline USHORT GetMinorVersion(VOID) const;
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inline USHORT GetDllVersion(VOID) const;
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inline SCODE SetDirLength(const FSINDEX cDirSect);
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inline FSINDEX GetDirLength(VOID) const;
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inline SCODE SetFatLength(const FSINDEX cFatSect);
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inline FSINDEX GetFatLength(VOID) const;
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inline SCODE SetMiniFatLength(const FSINDEX cFatSect);
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inline FSINDEX GetMiniFatLength(VOID) const;
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inline SCODE SetDirStart(const SECT sect);
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inline SECT GetDirStart(VOID) const;
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inline SCODE SetFatStart(const SECT sect);
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inline SECT GetFatStart(VOID) const;
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inline SCODE SetMiniFatStart(const SECT sect);
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inline SECT GetMiniFatStart(VOID) const;
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inline SCODE SetDifStart(const SECT sect);
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inline SECT GetDifStart(VOID) const;
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inline SCODE SetDifLength(const FSINDEX cFatSect);
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inline FSINDEX GetDifLength(VOID) const;
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inline SECT GetFatSect(const FSINDEX oSect) const;
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inline SCODE SetFatSect(const FSINDEX oSect, const SECT sect);
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inline USHORT GetSectorShift(VOID) const;
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inline USHORT GetMiniSectorShift(VOID) const;
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inline ULONG GetMiniSectorCutoff(VOID) const;
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inline DFSIGNATURE GetCommitSig(VOID) const;
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inline void SetCommitSig(const DFSIGNATURE sig);
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inline BOOL IsDirty(void) const;
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inline CMSFHeaderData * GetData(void);
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inline void SetDirty(void);
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inline void ResetDirty(void);
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private:
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CMSFHeaderData _hdr;
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BOOL _fDirty;
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SCODE SetSig(const BYTE *pbSig);
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};
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inline SCODE CMSFHeader::SetDirLength(const FSINDEX cDirSect)
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{
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if (_hdr._uSectorShift > SECTORSHIFT512)
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{
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_hdr._csectDir = cDirSect;
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_fDirty = TRUE;
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}
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return S_OK;
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}
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inline FSINDEX CMSFHeader::GetDirLength(VOID) const
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{
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return _hdr._csectDir;
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}
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inline SCODE CMSFHeader::SetFatLength(const FSINDEX cFatSect)
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{
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msfDebugOut((DEB_ITRACE, "In CMSFHeader::SetFatLength(%lu)\n",cFatSect));
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_hdr._csectFat = cFatSect;
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_fDirty = TRUE;
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msfDebugOut((DEB_ITRACE, "Out CMSFHeader::SetFatLength()\n"));
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return S_OK;
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}
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inline FSINDEX CMSFHeader::GetFatLength(VOID) const
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{
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return _hdr._csectFat;
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}
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inline SCODE CMSFHeader::SetMiniFatLength(const FSINDEX cFatSect)
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{
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msfDebugOut((DEB_ITRACE, "In CMSFHeader::SetMiniFatLength(%lu)\n",
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cFatSect));
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_hdr._csectMiniFat = cFatSect;
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_fDirty = TRUE;
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msfDebugOut((DEB_ITRACE, "Out CMSFHeader::SetMiniFatLength()\n"));
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return S_OK;
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}
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inline FSINDEX CMSFHeader::GetMiniFatLength(VOID) const
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{
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return _hdr._csectMiniFat;
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}
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inline SCODE CMSFHeader::SetDirStart(const SECT sectNew)
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{
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_hdr._sectDirStart = sectNew;
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_fDirty = TRUE;
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return S_OK;
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}
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inline SECT CMSFHeader::GetDirStart(VOID) const
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{
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return _hdr._sectDirStart;
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}
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inline SCODE CMSFHeader::SetFatStart(const SECT sectNew)
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{
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_hdr._sectFat[0] = sectNew;
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_fDirty = TRUE;
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return S_OK;
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}
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inline SECT CMSFHeader::GetFatStart(VOID) const
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{
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return _hdr._sectFat[0];
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CMSFHeader::SetMiniFatStart
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//
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// Synopsis: Sets minifat's first sector's index
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//
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// Arguments: [sectNew] -- sector index
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//
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// Returns: S_OK (necessary?)
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//
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// Modifies: _sectMiniFatStart
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//
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// History: 12-May-92 AlexT Added minifat support
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//
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//--------------------------------------------------------------------------
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inline SCODE CMSFHeader::SetMiniFatStart(const SECT sectNew)
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{
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_hdr._sectMiniFatStart = sectNew;
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_fDirty = TRUE;
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return S_OK;
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CMSFHeader::GetMiniFatStart
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//
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// Synopsis: Gets minifat's first sector's index
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//
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// Returns: minifat's first sector's index
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//
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// History: 12-May-92 AlexT Added minifat support
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//
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//--------------------------------------------------------------------------
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inline SECT CMSFHeader::GetMiniFatStart(VOID) const
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{
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return _hdr._sectMiniFatStart;
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}
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inline SCODE CMSFHeader::SetDifStart(const SECT sectNew)
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{
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_hdr._sectDifStart = sectNew;
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_fDirty = TRUE;
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return S_OK;
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}
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inline SECT CMSFHeader::GetDifStart(VOID) const
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{
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return _hdr._sectDifStart;
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}
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inline SECT CMSFHeader::GetFatSect(const FSINDEX oSect) const
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{
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msfAssert(oSect < CSECTFAT);
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return _hdr._sectFat[oSect];
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}
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inline SCODE CMSFHeader::SetFatSect(const FSINDEX oSect, const SECT sect)
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{
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msfAssert(oSect < CSECTFAT);
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_hdr._sectFat[oSect] = sect;
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_fDirty = TRUE;
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return S_OK;
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}
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inline SCODE CMSFHeader::SetDifLength(const FSINDEX cFatSect)
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{
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_hdr._csectDif = cFatSect;
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_fDirty = TRUE;
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return S_OK;
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}
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inline FSINDEX CMSFHeader::GetDifLength(VOID) const
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{
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return _hdr._csectDif;
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}
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inline USHORT CMSFHeader::GetSectorShift(VOID) const
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{
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return _hdr._uSectorShift;
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}
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inline DFSIGNATURE CMSFHeader::GetCommitSig(VOID) const
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{
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return _hdr._signature;
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}
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inline void CMSFHeader::SetCommitSig(const DFSIGNATURE sig)
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{
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_hdr._signature = sig;
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_fDirty = TRUE;
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}
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inline USHORT CMSFHeader::GetMiniSectorShift(VOID) const
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{
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return _hdr._uMiniSectorShift;
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}
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inline ULONG CMSFHeader::GetMiniSectorCutoff(VOID) const
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{
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return _hdr._ulMiniSectorCutoff;
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}
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inline USHORT CMSFHeader::GetMinorVersion(VOID) const
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{
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return _hdr._uMinorVersion;
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}
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inline USHORT CMSFHeader::GetDllVersion(VOID) const
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{
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return _hdr._uDllVersion;
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}
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inline BOOL CMSFHeader::IsDirty(void) const
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{
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return _fDirty;
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}
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inline CMSFHeaderData * CMSFHeader::GetData(void)
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{
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return &_hdr;
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}
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inline void CMSFHeader::SetDirty(void)
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{
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_fDirty = TRUE;
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}
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inline void CMSFHeader::ResetDirty(void)
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{
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_fDirty = FALSE;
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}
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const ULONG OACCESS = 0x7FFFFF80;
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const ULONG OREADLOCK = OACCESS + 1; // 0x7FFFFF81
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const ULONG CREADLOCKS = 16;
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const ULONG OUPDATE = OREADLOCK + CREADLOCKS + 1; // 0x7FFFFF92
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const ULONG OOPENLOCK = OUPDATE + 1;
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const ULONG COPENLOCKS = 20;
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const ULONG OOPENREADLOCK = OOPENLOCK; // 0x7FFFFF93
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const ULONG OOPENWRITELOCK = OOPENLOCK + COPENLOCKS; // 0x7FFFFFA7
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const ULONG OOPENDENYREADLOCK = OOPENWRITELOCK + COPENLOCKS; // 0x7FFFFFBB
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const ULONG OOPENDENYWRITELOCK = OOPENDENYREADLOCK + COPENLOCKS; // 0x7FFFFFCF
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const ULONG OLOCKREGIONEND = OOPENDENYWRITELOCK + COPENLOCKS;
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#ifdef USE_NOSNAPSHOT
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const ULONG OOPENNOSNAPSHOTLOCK = OACCESS - COPENLOCKS;
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#endif
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#ifdef DIRECTWRITERLOCK
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const ULONG ODIRECTWRITERLOCK = OOPENNOSNAPSHOTLOCK - COPENLOCKS;
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#endif
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const ULONG OLOCKREGIONBEGIN = 0x7FFFFF00;
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const ULONG OLOCKREGIONEND_SECTORALIGNED = 0x80000000;
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#endif //__HEADER_HXX__
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