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//-----------------------------------------------------------------------
//
// File: chkdsk.cxx
//
// Contents: Sanity checking and recovery mechanism for multistream files
//
// Argument:
//
// History: August-21-92 t-chrisy Created.
//------------------------------------------------------------------------
#include <stdlib.h>
#include <stdio.h>
#include <msf.hxx>
#include <filest.hxx>
#include <header.hxx>
#include <fat.hxx>
#include <wchar.h>
#include <handle.hxx>
#include <dfmsp.hxx>
#include <dir.hxx>
#define INVALID_DOCFILE 1
#define FAIL_CREATE_MULTISTREAM 2
#define INVALID_ARG 3
#define FAIL_CREATE_ILB 4
#define NONE 0
#define TABLE_SIZE (SECTORSIZE/sizeof(SECT))
//+-------------------------------------------------------------------------
//
// Function: DllMultiStreamFromCorruptedStream
//
// Synopsis: Create a new multistream instance from an existing stream.
// This is used to reopen a stored multi-stream.
//
// Effects: Creates a new CMStream instance
//
// Arguments: [ppms] -- Pointer to storage for return of multistream
// [pplstStream] -- Stream to be used by multi-stream for
// reads and writes
// [dwFlags] - Startup flags
//
// Returns: STG_E_INVALIDHEADER if signature on pStream does not
// match.
// STG_E_UNKNOWN if there was a problem in setup.
// S_OK if call completed OK.
//
// Algorithm: Check the signature on the pStream and on the contents
// of the pStream. If either is a mismatch, return
// STG_E_INVALIDHEADER.
// Create a new CMStream instance and run the setup function.
// If the setup function fails, return STG_E_UNKNOWN.
// Otherwise, return S_OK.
//
// History: 17-Aug-91 PhilipLa Created.
// 26-Aug-92 t-chrisy modifed to reduce ErrJmp
// Notes:
//
//--------------------------------------------------------------------------
SCODE DllMultiStreamFromCorruptedStream(CMStream MSTREAM_NEAR **ppms,
ILockBytes **pplstStream,
DWORD dwFlags)
{
SCODE sc;
CMStream MSTREAM_NEAR *temp;
BOOL fConvert = ((dwFlags & RSF_CONVERT) != 0);
BOOL fDelay = ((dwFlags & RSF_DELAY) != 0);
BOOL fTruncate = ((dwFlags & RSF_TRUNCATE) != 0);
msfDebugOut((DEB_ITRACE,"In DllMultiStreamFromStream\n"));
msfMem(temp = new CMStream(pplstStream, NULL, SECTORSHIFT));
ULARGE_INTEGER ulSize;
(*pplstStream)->GetSize(&ulSize);
msfAssert(ULIGetHigh(ulSize) == 0);
msfDebugOut((DEB_ITRACE,"Size is: %lu\n",ULIGetLow(ulSize)));
do
{
if ((ULIGetLow(ulSize) != 0) && (fConvert))
{
msfChk(temp->InitConvert(fDelay));
break;
}
if ((ULIGetLow(ulSize) == 0) || (fTruncate))
{
msfChk(temp->InitNew(fDelay));
break;
}
msfChk(temp->Init());
if (FAILED(sc))
msfDebugOut((DEB_ITRACE,"Fail to initialize multistream.\n"));
}
while (FALSE);
*ppms = temp;
msfDebugOut((DEB_ITRACE,"Leaving DllMultiStreamFromStream\n"));
if (fConvert && ULIGetLow(ulSize) && !fDelay)
return STG_I_CONVERTED;
return S_OK;
Err:
delete temp;
return sc;
}
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