RTR3DECL(int) RTFileSeek(RTFILE hFile, int64_t offSeek, unsigned uMethod, uint64_t *poffActual)
{
static ULONG aulSeekRecode[] =
{
FILE_BEGIN,
FILE_CURRENT,
FILE_END,
};
/*
* Validate input.
*/
if (uMethod > RTFILE_SEEK_END)
{
AssertMsgFailed(("Invalid uMethod=%d\n", uMethod));
return VERR_INVALID_PARAMETER;
}
/*
* Execute the seek.
*/
if (MySetFilePointer(hFile, offSeek, poffActual, aulSeekRecode[uMethod]))
return VINF_SUCCESS;
return RTErrConvertFromWin32(GetLastError());
}
RTR3DECL(int) RTFileSetSize(RTFILE hFile, uint64_t cbSize)
{
/*
* Get current file pointer.
*/
int rc;
uint64_t offCurrent;
if (MySetFilePointer(hFile, 0, &offCurrent, FILE_CURRENT))
{
/*
* Set new file pointer.
*/
if (MySetFilePointer(hFile, cbSize, NULL, FILE_BEGIN))
{
/* set file pointer */
if (SetEndOfFile((HANDLE)RTFileToNative(hFile)))
{
/*
* Restore file pointer and return.
* If the old pointer was beyond the new file end, ignore failure.
*/
if ( MySetFilePointer(hFile, offCurrent, NULL, FILE_BEGIN)
|| offCurrent > cbSize)
return VINF_SUCCESS;
}
/*
* Failed, try restoring the file pointer.
*/
rc = GetLastError();
MySetFilePointer(hFile, offCurrent, NULL, FILE_BEGIN);
}
else
rc = GetLastError();
}
else
rc = GetLastError();
return RTErrConvertFromWin32(rc);
}
/**
* This is a helper to check if an attempt was made to grow a file beyond the
* limit of the filesystem.
*
* @returns true for file size limit exceeded.
* @param hFile Filehandle.
* @param offSeek Offset to seek.
* @param uMethod The seek method.
*/
DECLINLINE(bool) IsBeyondLimit(RTFILE hFile, uint64_t offSeek, unsigned uMethod)
{
bool fIsBeyondLimit = false;
/*
* Get the current file position and try set the new one.
* If it fails with a seek error it's because we hit the file system limit.
*/
/** @todo r=bird: I'd be very interested to know on which versions of windows and on which file systems
* this supposedly works. The fastfat sources in the latest WDK makes no limit checks during
* file seeking, only at the time of writing (and some other odd ones we cannot make use of). */
uint64_t offCurrent;
if (MySetFilePointer(hFile, 0, &offCurrent, FILE_CURRENT))
{
if (!MySetFilePointer(hFile, offSeek, NULL, uMethod))
fIsBeyondLimit = GetLastError() == ERROR_SEEK;
else /* Restore file pointer on success. */
MySetFilePointer(hFile, offCurrent, NULL, FILE_BEGIN);
}
return fIsBeyondLimit;
}
RESLT COutputReader::OpenOutputFile(TCHAR *FileName)
{
DWORD bytes;
//int i;
//SPECIESBINOUTINF speInf;
CEnvironmentData bath;
CEnvironmentData salt;
CEnvironmentData temp;
//DWORD filePointer;
//RESLT res;
//BOOL rslt;
if(m_hdl != NULL && m_hdl != INVALID_HANDLE_VALUE)
CloseOutputFile();
m_hdl = CreateFile(FileName, GENERIC_READ, NULL, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, 0);
if(m_hdl == INVALID_HANDLE_VALUE)
return OPENFILEREAD_ERROR;
if(FALSE == ReadFile(m_hdl, &m_sceParams, sizeof(_fSCENARIOPARAMS), &bytes, NULL))
{
CloseOutputFile();
return FILEREAD_ERROR;
}
//CloseOutputFile();
return OK;
// Not sure about what follows
# if 0
m_binOutputConfig = CFileManager::TranslateBinFileOutConfiguration(m_sceParams.binOutStateItemConfig);
// Read in the bathymetry file (if the scenario was configured to save it).
if(m_binOutputConfig.headerInf.bathyMap == TRUE && OK != (res = bath.LoadFromBinFile(m_hdl)))
{
CloseOutputFile();
return res;
}
// Read in the salinity file (if the scenario was configured to save it).
if(m_binOutputConfig.headerInf.salinityMap == TRUE && OK != (res = salt.LoadFromBinFile(m_hdl)))
{
CloseOutputFile();
return res;
}
// Read in the temperature file (if the scenario was configured to save it).
if(m_binOutputConfig.headerInf.temperatureMap == TRUE && OK != (res = temp.LoadFromBinFile(m_hdl)))
{
CloseOutputFile();
return res;
}
// Skip past statistical data if scenario was configured to save it.
if(m_binOutputConfig.headerInf.postRunAnalysis == TRUE)
{
filePointer = MySetFilePointer(m_hdl, sizeof(TAKE), FILE_CURRENT);
filePointer = MySetFilePointer(m_hdl, sizeof(TAKESTATS)*m_sceParams.numSpecies, FILE_CURRENT);
}
// Read in species model information (if the scenario was configured to save it).
if(m_binOutputConfig.headerInf.speInfAndAnimatAsscn == TRUE)
{
_ASSERT(m_speInf == NULL);
_ASSERT(m_aniAssoc == NULL);
m_speInf = new SPECIESBINOUTINF[m_sceParams.numSpecies];
m_aniAssoc = new ANIMATASSCN[m_sceParams.totalNumAnimats];
// Skip over minor species information
for(i=0; i<(int)m_sceParams.numSpecies && rslt == TRUE; i++)
{
if(FALSE == (rslt = ReadFile(m_hdl, &m_speInf[i], sizeof(SPECIESBINOUTINF), &bytes, NULL)))
return FILEREAD_ERROR;
// Skip past the behavior names that belong to this species.
filePointer = MySetFilePointer(m_hdl, __int64(m_speInf[i].description.numBehaviors) * sizeof(BEHAVIOR_NAME), FILE_CURRENT);
if(INVALID_SET_FILE_POINTER == filePointer)
return SETFILEPOINTER_ERROR;
}
// Read in animat summaries/association to species.
rslt &= ReadFile(m_hdl, m_aniAssoc, m_sceParams.totalNumAnimats * sizeof(ANIMATASSCN), &bytes, NULL);
return FILEREAD_ERROR;
}
// Skip over acoustic exposures, get the file pointer for animat states (- 1
// to number of iterations because because an initial AE isn't saved).
m_filePointerAnimats =
MySetFilePointer(m_hdl, __int64(m_sceParams.duration-1) * sizeof(ACST_SRC_STATE), FILE_CURRENT);
if(INVALID_SET_FILE_POINTER == filePointer)
return SETFILEPOINTER_ERROR;
return OK;
#endif
}
