99 lines
4.6 KiB
C++
99 lines
4.6 KiB
C++
// --------------------------------------------------------------------------------
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// InetStm.h
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// Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
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// Steven J. Bailey
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// --------------------------------------------------------------------------------
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#ifndef __INETTEXT_H
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#define __INETTEXT_H
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// --------------------------------------------------------------------------------
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// Depends
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// --------------------------------------------------------------------------------
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#include "variantx.h"
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// --------------------------------------------------------------------------------
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// Forward Decls
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// --------------------------------------------------------------------------------
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class CStreamLockBytes;
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// --------------------------------------------------------------------------------
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// INETSTREAMBUFFER
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// --------------------------------------------------------------------------------
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typedef struct tagINETSTREAMBUFFER {
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ULARGE_INTEGER uliOffset; // Global offset of the start of this cache
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BYTE rgb[4096]; // Cached portion of m_pStmLock
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ULONG cb; // How many valid bytes in rgbCache
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ULONG i; // Current Read Offset into rgb
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CHAR chPrev; // Previous character, could be in previous buffer
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} INETSTREAMBUFFER, *LPINETSTREAMBUFFER;
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// --------------------------------------------------------------------------------
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// INETSTREAMLINE
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// --------------------------------------------------------------------------------
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typedef struct tagINETSTREAMLINE {
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BOOL fReset; // Reset to 0 on next call to ReadLine
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BYTE rgbScratch[1024]; // Cached portion of m_pStmLock
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LPBYTE pb; // Actual line (could be allocated != rgb)
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ULONG cb; // How many valid bytes in rgbCache
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ULONG cbAlloc; // Size of buffer pointed to by pb
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} INETSTREAMLINE, *LPINETSTREAMLINE;
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// --------------------------------------------------------------------------------
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// CInternetStream
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// --------------------------------------------------------------------------------
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class CInternetStream : public IUnknown
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{
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public:
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// ----------------------------------------------------------------------------
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// Construction
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// ----------------------------------------------------------------------------
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CInternetStream(void);
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~CInternetStream(void);
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// ----------------------------------------------------------------------------
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// IUnknown Members
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// ----------------------------------------------------------------------------
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STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppv) {
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return TrapError(E_NOTIMPL); }
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STDMETHODIMP_(ULONG) AddRef(void);
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STDMETHODIMP_(ULONG) Release(void);
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// ----------------------------------------------------------------------------
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// IInternetStream Members
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// ----------------------------------------------------------------------------
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HRESULT HrInitNew(IStream *pStream);
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HRESULT HrReadToEnd(void);
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HRESULT HrReadLine(LPPROPSTRINGA pLine);
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HRESULT HrReadHeaderLine(LPPROPSTRINGA pHeader, LONG *piColonPos);
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HRESULT HrGetSize(DWORD *pcbSize);
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#ifdef MAC
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DWORD DwGetOffset(void) { return m_uliOffset.LowPart; }
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#else // !MAC
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DWORD DwGetOffset(void) { return (DWORD)m_uliOffset.QuadPart; }
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#endif // MAC
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void InitNew(DWORD dwOffset, CStreamLockBytes *pStmLock);
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void GetLockBytes(CStreamLockBytes **ppStmLock);
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void Seek(DWORD dwOffset);
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void SetFullyAvailable(BYTE fFullyAvailable) { m_fFullyAvailable = fFullyAvailable; }
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private:
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// ----------------------------------------------------------------------------
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// Private Methods
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// ----------------------------------------------------------------------------
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HRESULT _HrGetNextBuffer(void);
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private:
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// ----------------------------------------------------------------------------
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// Private Data
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// ----------------------------------------------------------------------------
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ULONG m_cRef; // Reference Count
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BYTE m_fFullyAvailable; // Is all the data available
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CStreamLockBytes *m_pStmLock; // Thread Safe Data Source
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ULARGE_INTEGER m_uliOffset; // Last Read Postion of m_pStmLock
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INETSTREAMBUFFER m_rBuffer; // Current Buffer
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INETSTREAMLINE m_rLine; // Current Line
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};
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#endif // __INETTEXT_H
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