void VRTRawRasterBand::ClearRawLink()
{
if( m_poRawRaster != NULL )
{
VSILFILE* fp = m_poRawRaster->GetFPL();
delete m_poRawRaster;
m_poRawRaster = NULL;
// We close the file after deleting the raster band
// since data can be flushed in the destructor.
if( fp != NULL )
{
CPLCloseShared( reinterpret_cast<FILE*>( fp ) );
}
}
CPLFree( m_pszSourceFilename );
m_pszSourceFilename = NULL;
}
CPLErr VRTRawRasterBand::SetRawLink( const char *pszFilename,
const char *pszVRTPath,
int bRelativeToVRTIn,
vsi_l_offset nImageOffset,
int nPixelOffset, int nLineOffset,
const char *pszByteOrder )
{
ClearRawLink();
reinterpret_cast<VRTDataset *>( poDS )->SetNeedsFlush();
/* -------------------------------------------------------------------- */
/* Prepare filename. */
/* -------------------------------------------------------------------- */
if( pszFilename == nullptr )
{
CPLError( CE_Warning, CPLE_AppDefined,
"Missing <SourceFilename> element in VRTRasterBand." );
return CE_Failure;
}
char *pszExpandedFilename = nullptr;
if( pszVRTPath != nullptr && bRelativeToVRTIn )
{
pszExpandedFilename = CPLStrdup(
CPLProjectRelativeFilename( pszVRTPath, pszFilename ) );
}
else
{
pszExpandedFilename = CPLStrdup( pszFilename );
}
/* -------------------------------------------------------------------- */
/* Try and open the file. We always use the large file API. */
/* -------------------------------------------------------------------- */
CPLPushErrorHandler(CPLQuietErrorHandler);
FILE *fp = CPLOpenShared( pszExpandedFilename, "rb+", TRUE );
if( fp == nullptr )
fp = CPLOpenShared( pszExpandedFilename, "rb", TRUE );
if( fp == nullptr
&& reinterpret_cast<VRTDataset *>( poDS )->GetAccess() == GA_Update )
{
fp = CPLOpenShared( pszExpandedFilename, "wb+", TRUE );
}
CPLPopErrorHandler();
CPLErrorReset();
if( fp == nullptr )
{
CPLError( CE_Failure, CPLE_OpenFailed,
"Unable to open %s.%s",
pszExpandedFilename, VSIStrerror( errno ) );
CPLFree( pszExpandedFilename );
return CE_Failure;
}
CPLFree( pszExpandedFilename );
if( !RAWDatasetCheckMemoryUsage(
nRasterXSize, nRasterYSize, 1,
GDALGetDataTypeSizeBytes(GetRasterDataType()),
nPixelOffset, nLineOffset, nImageOffset, 0,
reinterpret_cast<VSILFILE*>(fp)) )
{
CPLCloseShared(fp);
return CE_Failure;
}
m_pszSourceFilename = CPLStrdup(pszFilename);
m_bRelativeToVRT = bRelativeToVRTIn;
/* -------------------------------------------------------------------- */
/* Work out if we are in native mode or not. */
/* -------------------------------------------------------------------- */
bool bNative = true;
if( pszByteOrder != nullptr )
{
if( EQUAL(pszByteOrder,"LSB") )
bNative = CPL_TO_BOOL(CPL_IS_LSB);
else if( EQUAL(pszByteOrder,"MSB") )
bNative = !CPL_IS_LSB;
else
{
CPLError( CE_Failure, CPLE_AppDefined,
"Illegal ByteOrder value '%s', should be LSB or MSB.",
pszByteOrder );
CPLCloseShared(fp);
return CE_Failure;
}
}
/* -------------------------------------------------------------------- */
/* Create a corresponding RawRasterBand. */
/* -------------------------------------------------------------------- */
m_poRawRaster = new RawRasterBand( reinterpret_cast<VSILFILE*>(fp),
nImageOffset, nPixelOffset,
nLineOffset, GetRasterDataType(),
bNative, GetXSize(), GetYSize(),
RawRasterBand::OwnFP::NO );
/* -------------------------------------------------------------------- */
/* Reset block size to match the raw raster. */
/* -------------------------------------------------------------------- */
m_poRawRaster->GetBlockSize( &nBlockXSize, &nBlockYSize );
return CE_None;
}
