CPLErr VRTRawRasterBand::XMLInit( CPLXMLNode * psTree,
const char *pszVRTPath )
{
const CPLErr eErr = VRTRasterBand::XMLInit( psTree, pszVRTPath );
if( eErr != CE_None )
return eErr;
/* -------------------------------------------------------------------- */
/* Validate a bit. */
/* -------------------------------------------------------------------- */
if( psTree == NULL || psTree->eType != CXT_Element
|| !EQUAL(psTree->pszValue, "VRTRasterBand")
|| !EQUAL(CPLGetXMLValue(psTree,"subClass",""), "VRTRawRasterBand") )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Invalid node passed to VRTRawRasterBand::XMLInit()." );
return CE_Failure;
}
/* -------------------------------------------------------------------- */
/* Prepare filename. */
/* -------------------------------------------------------------------- */
const char *pszFilename =
CPLGetXMLValue(psTree, "SourceFilename", NULL);
if( pszFilename == NULL )
{
CPLError( CE_Warning, CPLE_AppDefined,
"Missing <SourceFilename> element in VRTRasterBand." );
return CE_Failure;
}
// TODO(schwehr): Should this be a bool?
const int l_bRelativeToVRT =
atoi(CPLGetXMLValue( psTree, "SourceFilename.relativeToVRT", "1" ) );
/* -------------------------------------------------------------------- */
/* Collect layout information. */
/* -------------------------------------------------------------------- */
int nWordDataSize = GDALGetDataTypeSizeBytes( GetRasterDataType() );
const char* pszImageOffset = CPLGetXMLValue( psTree, "ImageOffset", "0");
const vsi_l_offset nImageOffset = CPLScanUIntBig(
pszImageOffset, static_cast<int>(strlen(pszImageOffset)) );
int nPixelOffset = nWordDataSize;
if( CPLGetXMLValue( psTree, "PixelOffset", NULL ) != NULL )
{
nPixelOffset = atoi(CPLGetXMLValue( psTree, "PixelOffset", "0") );
}
if (nPixelOffset <= 0)
{
CPLError( CE_Failure, CPLE_AppDefined,
"Invalid value for <PixelOffset> element : %d",
nPixelOffset );
return CE_Failure;
}
int nLineOffset = 0;
if( CPLGetXMLValue( psTree, "LineOffset", NULL ) == NULL )
nLineOffset = nWordDataSize * GetXSize();
else
nLineOffset = atoi(CPLGetXMLValue( psTree, "LineOffset", "0") );
const char *pszByteOrder = CPLGetXMLValue( psTree, "ByteOrder", NULL );
/* -------------------------------------------------------------------- */
/* Open the file, and setup the raw layer access to the data. */
/* -------------------------------------------------------------------- */
return SetRawLink( pszFilename, pszVRTPath, l_bRelativeToVRT,
nImageOffset, nPixelOffset, nLineOffset,
pszByteOrder );
}
CPLErr VRTRawRasterBand::XMLInit( CPLXMLNode * psTree,
const char *pszVRTPath,
void* pUniqueHandle,
std::map<CPLString, GDALDataset*>& oMapSharedSources )
{
const CPLErr eErr = VRTRasterBand::XMLInit( psTree, pszVRTPath, pUniqueHandle,
oMapSharedSources );
if( eErr != CE_None )
return eErr;
/* -------------------------------------------------------------------- */
/* Validate a bit. */
/* -------------------------------------------------------------------- */
if( psTree == nullptr || psTree->eType != CXT_Element
|| !EQUAL(psTree->pszValue, "VRTRasterBand")
|| !EQUAL(CPLGetXMLValue(psTree,"subClass",""), "VRTRawRasterBand") )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Invalid node passed to VRTRawRasterBand::XMLInit()." );
return CE_Failure;
}
/* -------------------------------------------------------------------- */
/* Prepare filename. */
/* -------------------------------------------------------------------- */
const char *pszFilename =
CPLGetXMLValue(psTree, "SourceFilename", nullptr);
if( pszFilename == nullptr )
{
CPLError( CE_Warning, CPLE_AppDefined,
"Missing <SourceFilename> element in VRTRasterBand." );
return CE_Failure;
}
const bool l_bRelativeToVRT = CPLTestBool(
CPLGetXMLValue( psTree, "SourceFilename.relativeToVRT", "1" ));
/* -------------------------------------------------------------------- */
/* Collect layout information. */
/* -------------------------------------------------------------------- */
int nWordDataSize = GDALGetDataTypeSizeBytes( GetRasterDataType() );
const char* pszImageOffset = CPLGetXMLValue( psTree, "ImageOffset", "0");
const vsi_l_offset nImageOffset = CPLScanUIntBig(
pszImageOffset, static_cast<int>(strlen(pszImageOffset)) );
int nPixelOffset = nWordDataSize;
const char* pszPixelOffset =
CPLGetXMLValue( psTree, "PixelOffset", nullptr );
if( pszPixelOffset != nullptr )
{
nPixelOffset = atoi(pszPixelOffset);
}
if (nPixelOffset <= 0)
{
CPLError( CE_Failure, CPLE_AppDefined,
"Invalid value for <PixelOffset> element : %d",
nPixelOffset );
return CE_Failure;
}
int nLineOffset = 0;
const char* pszLineOffset = CPLGetXMLValue( psTree, "LineOffset", nullptr );
if( pszLineOffset == nullptr )
{
if( nPixelOffset > INT_MAX / GetXSize() )
{
CPLError( CE_Failure, CPLE_AppDefined, "Int overflow");
return CE_Failure;
}
nLineOffset = nPixelOffset * GetXSize();
}
else
nLineOffset = atoi(pszLineOffset);
const char *pszByteOrder = CPLGetXMLValue( psTree, "ByteOrder", nullptr );
/* -------------------------------------------------------------------- */
/* Open the file, and setup the raw layer access to the data. */
/* -------------------------------------------------------------------- */
return SetRawLink( pszFilename, pszVRTPath, l_bRelativeToVRT,
nImageOffset, nPixelOffset, nLineOffset,
pszByteOrder );
}