188 lines
4.4 KiB
C++
188 lines
4.4 KiB
C++
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1992.
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//
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// File: difat.hxx
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//
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// Contents: Double-indirect Fat class headers
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//
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// Classes: CDIFat
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// CDIFatVector
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//
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// Functions:
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//
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// History: 02-Sep-92 PhilipLa Created.
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//
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//--------------------------------------------------------------------------
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#ifndef __DIFAT_HXX__
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#define __DIFAT_HXX__
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//+-------------------------------------------------------------------------
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//
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// Class: CDIFat (dif)
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//
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// Purpose: Double Indirect Fat class for MSF
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//
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// Interface: See below.
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//
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// History: 11-May-92 PhilipLa Created.
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//
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//--------------------------------------------------------------------------
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class CDIFat
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{
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public:
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CDIFat();
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CDIFat(CDIFat *pfatOld);
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inline ~CDIFat();
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VOID Empty(VOID);
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SCODE GetFatSect(const FSINDEX oSect, SECT *psect);
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SCODE SetFatSect(const FSINDEX oSect, const SECT sect);
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SCODE GetSect(const FSINDEX oSect, SECT *psect);
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SCODE Init(CMStream *pmsParent, const FSINDEX cFatSect);
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inline void InitCopy(CDIFat *pfatOld);
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SCODE InitConvert(CMStream *pmsParent, SECT sectMax);
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SCODE InitNew(CMStream *pmsParent);
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SCODE Lookup(const SECT sect, SECT *psectRet);
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SCODE Fixup(CMStream * pmsShadow);
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SCODE Remap(const FSINDEX oSect, SECT *psectReturn);
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SCODE RemapSelf(VOID);
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SCODE Flush(void);
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#ifdef DIFAT_LOOKUP_ARRAY
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inline void CacheUnmarkedSect(SECT sectNew, SECT sectMark, SECT sectFree);
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#endif
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inline void SetParent(CMStream *pms);
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private:
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CFatVector _fv;
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CBasedMStreamPtr _pmsParent;
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FSINDEX _cfsTable;
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#ifdef DIFAT_LOOKUP_ARRAY
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#define DIFAT_ARRAY_SIZE 8
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BOOL _fDoingFixup;
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#ifdef LARGE_DOCFILE
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ULONG _cUnmarked;
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#else
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USHORT _cUnmarked;
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#endif
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SECT _sectUnmarked[DIFAT_ARRAY_SIZE];
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SECT _sectMarkTo[DIFAT_ARRAY_SIZE];
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SECT _sectFree[DIFAT_ARRAY_SIZE];
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#endif
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SCODE Resize(FSINDEX fsiSize);
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inline VOID SectToPair(
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SECT sect,
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FSINDEX *pipfs,
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FSOFFSET *pisect) const;
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SECT PairToSect(FSINDEX ipfs, FSOFFSET isect) const;
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};
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//+-------------------------------------------------------------------------
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//
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// Method: CDIFat::~CDIFat, public
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//
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// Synopsis: CDIFat destructor
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//
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// History: 11-May-92 PhilipLa Created.
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//
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//--------------------------------------------------------------------------
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inline CDIFat::~CDIFat()
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{
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msfDebugOut((DEB_ITRACE, "In CDIFat destructor\n"));
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msfDebugOut((DEB_ITRACE, "Out CDIFat destructor\n"));
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CDIFat::InitCopy, public
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//
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// Synopsis: Init function for copying
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//
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// Arguments: [pfatOld] -- reference to CDIFat to be copied.
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//
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// Returns: S_OK if call completed OK.
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//
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// Algorithm: *Finish This*
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//
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// History: 11-May-92 PhilipLa Created.
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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inline void CDIFat::InitCopy(CDIFat *pfatOld)
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{
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msfDebugOut((DEB_ITRACE, "In CDIFat copy constructor\n"));
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_pmsParent = pfatOld->_pmsParent;
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_cfsTable = pfatOld->_cfsTable;
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_fv.InitCommon(pfatOld->_fv.GetSectBlock(), pfatOld->_fv.GetSectTable());
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_fv.InitCopy(&pfatOld->_fv);
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msfDebugOut((DEB_ITRACE, "Out CDIFat copy constructor\n"));
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}
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inline VOID CDIFat::SectToPair(FSINDEX sect, FSINDEX *pipfs, FSOFFSET *pisect) const
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{
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msfAssert(sect >= CSECTFAT);
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sect = sect - CSECTFAT;
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*pipfs = (FSINDEX)(sect / _fv.GetSectTable());
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*pisect = (FSOFFSET)(sect % _fv.GetSectTable());
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}
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inline SECT CDIFat::PairToSect(FSINDEX ipfs, FSOFFSET isect) const
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{
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return ipfs * _fv.GetSectTable() + isect + CSECTFAT;
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}
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inline void CDIFat::SetParent(CMStream *pms)
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{
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_pmsParent = P_TO_BP(CBasedMStreamPtr, pms);
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_fv.SetParent(pms);
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}
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#ifdef DIFAT_LOOKUP_ARRAY
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inline void CDIFat::CacheUnmarkedSect(SECT sectNew,
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SECT sectMark,
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SECT sectFree)
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{
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if (_cUnmarked < DIFAT_ARRAY_SIZE)
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{
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_sectUnmarked[_cUnmarked] = sectNew;
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_sectMarkTo[_cUnmarked] = sectMark;
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_sectFree[_cUnmarked] = sectFree;
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}
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_cUnmarked++;
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}
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#endif
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#endif //__DIFAT_HXX__
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