103 lines
2.5 KiB
C++
103 lines
2.5 KiB
C++
/* Copyright (c) Microsoft Corporation.
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Licensed under the MIT License. */
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/* Copyright (c) Microsoft Corporation.
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Licensed under the MIT License. */
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/***************************************************************************
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Author: ShonK
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Project: Kauai
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Reviewed:
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Copyright (c) Microsoft Corporation
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Stream classes.
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A BSM is a byte stream in memory. The data is stored contiguously, so
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should be used only for relatively small streams.
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A BSF is a byte stream with pieces stored in files and other pieces
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stored in memory.
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***************************************************************************/
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#ifndef STREAM_H
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#define STREAM_H
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/***************************************************************************
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Byte stream in memory. The entire stream is in contiguous memory.
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***************************************************************************/
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typedef class BSM *PBSM;
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#define BSM_PAR BASE
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#define kclsBSM 'BSM'
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class BSM : public BSM_PAR
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{
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RTCLASS_DEC
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ASSERT
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MARKMEM
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NOCOPY(BSM)
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protected:
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HQ _hqrgb;
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long _ibMac;
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long _cbMinGrow;
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bool _FEnsureSize(long cbMin, bool fShrink);
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public:
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BSM(void);
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~BSM(void);
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void SetMinGrow(long cb);
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bool FEnsureSpace(long cb, bool fShrink);
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void *PvLock(long ib);
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void Unlock(void);
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long IbMac(void)
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{ return _ibMac; }
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void FetchRgb(long ib, long cb, void *prgb);
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bool FReplace(void *prgb, long cbIns, long ib, long cbDel);
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bool FWriteRgb(PFLO pflo, long ib = 0);
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bool FWriteRgb(PBLCK pblck, long ib = 0);
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};
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/***************************************************************************
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Byte stream on file. Parts of the stream may be in files.
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***************************************************************************/
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typedef class BSF *PBSF;
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#define BSF_PAR BASE
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#define kclsBSF 'BSF'
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class BSF : public BSF_PAR
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{
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RTCLASS_DEC
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ASSERT
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MARKMEM
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NOCOPY(BSF)
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protected:
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PGG _pggflo;
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long _ibMac;
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long _IfloFind(long ib, long *pib, long *pcb = pvNil);
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bool _FEnsureSplit(long ib, long *piflo = pvNil);
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void _AttemptMerge(long ibMin, long ibLim);
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bool _FReplaceCore(void *prgb, long cbIns, PFLO pflo, long ib, long cbDel);
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public:
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BSF(void);
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~BSF(void);
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long IbMac(void)
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{ return _ibMac; }
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void FetchRgb(long ib, long cb, void *prgb);
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bool FReplace(void *prgb, long cbIns, long ib, long cbDel);
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bool FReplaceFlo(PFLO pflo, bool fCopy, long ib, long cbDel);
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bool FReplaceBsf(PBSF pbsfSrc, long ibSrc, long cbSrc, long ibDst, long cbDel);
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bool FWriteRgb(PFLO pflo, long ib = 0);
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bool FWriteRgb(PBLCK pblck, long ib = 0);
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bool FCompact(void);
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};
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#endif //!STREAM_H
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