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// Copyright (C) 1995-1999 Microsoft Corporation. All rights reserved.
// -----------------------------------------------------------------------
// Microsoft Distributed Transaction Coordinator (Microsoft Confidential)
// @doc
// @module ILogRead.H | Header for interface <i ILogRead>.<nl><nl>
// Usage:<nl>
// Clients of this DLL require this file.
// @rev 0 | 05/09/95 | rbarnes | Cloned: For LOGMGR.DLL
// -----------------------------------------------------------------------
#ifndef _ILGREAD_H
# define _ILGREAD_H
// ===============================
// INCLUDES:
// ===============================
#include <objbase.h>
#include "logrec.h" // logmgr general types
// ===============================
// INTERFACE: ILogRead
// ===============================
//#define DUMPBUFFERSIZE 0x5230 (((RECORDSPACE /BYTESPERLINE)+1)*CHARSPERLINE) + (8 * CHARSPERLINE) // data plus header space
#define BYTESPERLINE 16
#define CHARSPERLINE 80
#define DUMPBUFFERSIZE 0xA230
typedef enum _DUMP_TYPE { HEX_DUMP = 0, SUMMARY_DUMP = 1, RECORD_DUMP = 2 } DUMP_TYPE;
typedef enum _LRP_SEEK { LRP_START = -1, LRP_END = -2, LRP_CUR = 0 } LRP_SEEK;
// -----------------------------------------------------------------------
// @interface ILogRead | See also <c CILogRead>.<nl><nl>
// Description:<nl>
// Provide read functionality<nl><nl>
// Usage:<nl>
// Useless, but for an example.
// -----------------------------------------------------------------------
DECLARE_INTERFACE_ (ILogRead, IUnknown){ // @comm IUnknown methods: See <c CILogRead>.
STDMETHOD (QueryInterface) (THIS_ REFIID i_riid, LPVOID FAR* o_ppv) PURE; STDMETHOD_ (ULONG, AddRef) (THIS) PURE; STDMETHOD_ (ULONG, Release) (THIS) PURE;
// @comm ILogRead methods: See <c CILogRead>.
STDMETHOD (ReadInit) (void) PURE; STDMETHOD (ReadLRP ) (LRP lrpLRPStart, ULONG * ulByteLength, USHORT* usUserType) PURE; STDMETHOD (ReadNext ) (LRP *plrpLRP, ULONG * ulByteLength, USHORT* usUserType) PURE; STDMETHOD (GetCurrentLogRecord ) (char *pchBuffer) PURE; STDMETHOD (SetPosition)(LRP lrpLRPPosition)PURE; STDMETHOD (Seek) (LRP_SEEK llrpOrigin, LONG cbLogRecs, LRP* plrpNewLRP) PURE; STDMETHOD (GetCheckpoint) (DWORD cbNumCheckpoint, LRP* plrpLRP) PURE; STDMETHOD (DumpLog) (ULONG ulStartPage, ULONG ulEndPage, DUMP_TYPE ulDumpType, CHAR *szFileName) PURE; STDMETHOD (DumpPage) (CHAR * pchOutBuffer, ULONG ulPageNumber, DUMP_TYPE ulDumpType, ULONG *pulLength) PURE;
virtual CHAR * DumpLRP (LRP lrpTarget,CHAR *szFormat,DUMP_TYPE ulDumpType, ULONG *pulLength) PURE;
};
#endif _ILGREAD_H
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