C++ DataType::getId方法代码示例

//--------------------------------------------------------------------------
// Function:	Attribute::read
///\brief	Reads data from this attribute.
///\param	mem_type -  IN: Attribute datatype (in memory)
///\param	buf      - OUT: Buffer for read data
///\exception	H5::AttributeIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void Attribute::read( const DataType& mem_type, void *buf ) const
{
   herr_t ret_value = H5Aread( id, mem_type.getId(), buf );
   if( ret_value < 0 )
   {
      throw AttributeIException("Attribute::read", "H5Aread failed");
   }
}

//--------------------------------------------------------------------------
// Function:	Attribute::write
///\brief	Writes data to this attribute.
///\param	mem_type  - IN: Attribute datatype (in memory)
///\param	buf       - IN: Data to be written
///\exception	H5::AttributeIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void Attribute::write( const DataType& mem_type, const void *buf ) const
{
   herr_t ret_value = H5Awrite( id, mem_type.getId(), buf );
   if( ret_value < 0 )
   {
      throw AttributeIException("Attribute::write", "H5Awrite failed");
   }
}

//--------------------------------------------------------------------------
// Function:	DSetCreatPropList::getFillValue
///\brief	Retrieves a dataset fill value
///\param	fvalue_type - IN: Data type for the value passed via \a value
///\param	value - OUT: Pointer to buffer to hold the retrieved fill value
///\exception	H5::PropListIException
///\par Description
///		The fill value is returned through \a value pointer
///		and the memory is allocated by the caller.  The fill
///		value will be converted from its current data type to the
///		specified by \a fvalue_type.
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void DSetCreatPropList::getFillValue( const DataType& fvalue_type, void* value ) const
{
   herr_t ret_value = H5Pget_fill_value( id, fvalue_type.getId(), value );
   if( ret_value < 0 )
   {
      throw PropListIException("DSetCreatPropList::getFillValue",
                "H5Pget_fill_value failed");
   }
}

//--------------------------------------------------------------------------
// Function:	DataType::find
///\brief	Finds a conversion function that can handle a conversion
///		from this datatype to the specified datatype, \a dest.
///\param	dest   - IN: Destination datatype
///\param	pcdata - IN: Pointer to type conversion data
///\return	Pointer to a suitable conversion function
///\exception	H5::DataTypeIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
H5T_conv_t DataType::find( const DataType& dest, H5T_cdata_t **pcdata ) const
{
   // Call C routine to find the conversion function
   H5T_conv_t func = H5Tfind( id, dest.getId(), pcdata );
   if( func == NULL )
   {
      throw DataTypeIException(inMemFunc("find"), "H5Tfind returns a NULL function");
   }
   return( func );
}

//--------------------------------------------------------------------------
// Function:	DataSet::fillMemBuf
///\brief	This is an overloaded member function, provided for convenience.
///		It differs from the above function in that it only takes the
///		the last three arguments.
///\param	buf - IN/OUT: Memory buffer to fill selection within
///\param	buf_type - IN: Datatype of the elements in buffer
///\param	space - IN: Dataspace describing memory buffer & containing selection to use
///\exception	H5::DataSetIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void DataSet::fillMemBuf(void *buf, DataType& buf_type, DataSpace& space)
{
    hid_t buf_type_id = buf_type.getId();
    hid_t space_id = space.getId();
    herr_t ret_value = H5Dfill(NULL, buf_type_id, buf, buf_type_id, space_id);
    if( ret_value < 0 )
    {
	throw DataSetIException("DataSet::fillMemBuf", "H5Dfill failed");
    }
}

//--------------------------------------------------------------------------
// Function:	DataType::unregister
///\brief	Removes a conversion function from all conversion paths.
///\param	pers - IN: Conversion option
///			\li \c H5T_PERS_HARD for hard conversion functions
///			\li \c H5T_PERS_SOFT for soft conversion functions.
///\param	name - IN: Name displayed in diagnostic output.
///\param	dest - IN: Destination datatype.
///\param	func - IN: Function to convert between source and
///		destination datatypes.
///\exception	H5::DataTypeIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void DataType::unregister( H5T_pers_t pers, const char* name, const DataType& dest, H5T_conv_t func ) const
{
   hid_t dest_id = dest.getId();  // get id of the dest datatype for C API

   // Call C routine H5Tunregister to remove the conversion function
   herr_t ret_value = H5Tunregister( pers, name, id, dest_id, func );
   if( ret_value < 0 )
   {
      throw DataTypeIException(inMemFunc("unregister"), "H5Tunregister failed");
   }
}

//--------------------------------------------------------------------------
// Function:	DataSet::vlenReclaim
///\brief	Reclaims VL datatype memory buffers.
///\param	type - IN: Datatype, which is the datatype stored in the buffer
///\param	space - IN: Selection for the memory buffer to free the
///		VL datatypes within
///\param	xfer_plist - IN: Property list used to create the buffer
///\param	buf - IN: Pointer to the buffer to be reclaimed
///\exception	H5::DataSetIException
// Programmer	Binh-Minh Ribler - 2000
//\parDescription
//		This function has better prototype for the users than the
//		other, which might be removed at some point. BMR - 2006/12/20
//--------------------------------------------------------------------------
void DataSet::vlenReclaim(void* buf, const DataType& type, const DataSpace& space, const DSetMemXferPropList& xfer_plist)
{
   // Obtain identifiers for C API
   hid_t type_id = type.getId();
   hid_t space_id = space.getId();
   hid_t xfer_plist_id = xfer_plist.getId();

   herr_t ret_value = H5Dvlen_reclaim(type_id, space_id, xfer_plist_id, buf);
   if (ret_value < 0)
   {
      throw DataSetIException("DataSet::vlenReclaim", "H5Dvlen_reclaim failed");
   }
}

//--------------------------------------------------------------------------
// Function:	DataSet::iterateElems
///\brief	Iterates over all selected elements in a dataspace.
///\param	buf - IN/OUT: Pointer to the buffer in memory containing the
///		elements to iterate over
///\param	type - IN: Datatype for the elements stored in \a buf
///\param	space - IN: Dataspace for \a buf. Also contains the selection
///		to iterate over.
///\param	op - IN: Function pointer to the routine to be called for
///		each element in \a buf iterated over
///\param	op_data - IN/OUT: Pointer to any user-defined data associated
///		with the operation
///\exception	H5::DataSetIException
///\note	This function may not work correctly yet - it's still
///		under development.
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
int DataSet::iterateElems( void* buf, const DataType& type, const DataSpace& space, H5D_operator_t op, void* op_data )
{
   // Obtain identifiers for C API
   hid_t type_id = type.getId();
   hid_t space_id = space.getId();
   herr_t ret_value = H5Diterate( buf, type_id, space_id, op, op_data );
   if( ret_value >= 0 )
      return( ret_value );
   else  // raise exception when H5Diterate returns a negative value
   {
      throw DataSetIException("DataSet::iterateElems", "H5Diterate failed");
   }
}

//--------------------------------------------------------------------------
// Function:	DataSet::write
///\brief	Writes raw data from an application buffer to a dataset.
///\param	buf - IN: Buffer containing data to be written
///\param	mem_type - IN: Memory datatype
///\param	mem_space - IN: Memory dataspace
///\param	file_space - IN: Dataset's dataspace in the file
///\param	xfer_plist - IN: Transfer property list for this I/O operation
///\exception	H5::DataSetIException
///\par Description
///		This function writes raw data from an application buffer
///		\a buf to a dataset, converting from memory datatype
///		\a mem_type and dataspace \a mem_space to file datatype
///		and dataspace.
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void DataSet::write( const void* buf, const DataType& mem_type, const DataSpace& mem_space, const DataSpace& file_space, const DSetMemXferPropList& xfer_plist ) const
{
   // Obtain identifiers for C API
   hid_t mem_type_id = mem_type.getId();
   hid_t mem_space_id = mem_space.getId();
   hid_t file_space_id = file_space.getId();
   hid_t xfer_plist_id = xfer_plist.getId();

   herr_t ret_value = H5Dwrite( id, mem_type_id, mem_space_id, file_space_id, xfer_plist_id, buf );
   if( ret_value < 0 )
   {
      throw DataSetIException("DataSet::write", "H5Dwrite failed");
   }
}

QOSGWidgetFactory::ValueEditorCF
QOSGWidgetFactory::getValueEditor(const DataType &dataType)
{
    SINFO << "QOSGWidgetFactory::getValueEditor: " << dataType.getId() << endLog;

    ValueEditorCF    cFunc = NULL;
    ValueEditorMapIt it    = _typeEditorMap.find(dataType.getId());

    if(it != _typeEditorMap.end())
    {
        cFunc = it->second;
    }
    else if(strstr(dataType.getCName(), "Ptr") != NULL)
    {
        cFunc = _cfFCPtrEditor;
    }
    else
    {
        cFunc = _cfDefaultEditor;
    }

    return cFunc;
}

//--------------------------------------------------------------------------
// Function:	DataType::convert
///\brief	Converts data from this datatype to the specified datatypes.
///\param	dest       - IN: Destination datatype
///\param	nelmts     - IN: Size of array \a buf
///\param	buf        - IN/OUT: Array containing pre- and post-conversion
///				values
///\param	background - IN: Optional backgroud buffer
///\param	plist - IN: Property list - default to PropList::DEFAULT
///\return	Pointer to a suitable conversion function
///\exception	H5::DataTypeIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void DataType::convert( const DataType& dest, size_t nelmts, void *buf, void *background, const PropList& plist ) const
{
   // Get identifiers for C API
   hid_t dest_id = dest.getId();
   hid_t plist_id = plist.getId();

   // Call C routine H5Tconvert to convert the data
   herr_t ret_value;
   ret_value = H5Tconvert( id, dest_id, nelmts, buf, background, plist_id );
   if( ret_value < 0 )
   {
      throw DataTypeIException(inMemFunc("convert"), "H5Tconvert failed");
   }
}

//--------------------------------------------------------------------------
// Function:	DataType::operator==
///\brief	Compares this DataType against the given one to determines
///		whether the two objects refer to the same actual datatype.
///\param	compared_type - IN: Reference to the datatype to compare
///\return	true if the datatypes are equal, and false, otherwise.
///\exception	H5::DataTypeIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
bool DataType::operator==(const DataType& compared_type ) const
{
   // Call C routine H5Tequal to determines whether two datatype
   // identifiers refer to the same datatype
   htri_t ret_value = H5Tequal( id, compared_type.getId() );
   if( ret_value > 0 )
      return true;
   else if( ret_value == 0 )
      return false;
   else
   {
      throw DataTypeIException(inMemFunc("operator=="), "H5Tequal returns negative value");
   }
}

//--------------------------------------------------------------------------
// Function:	CompType::insertMember
///\brief	Inserts a new member to this compound datatype.
///\param	name - IN: Name of the new member
///\param	offset - IN: Offset in memory structure of the field to insert
///\param	new_member - IN: New member to be inserted
///\exception	H5::DataTypeIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void CompType::insertMember( const H5std_string& name, size_t offset, const DataType& new_member ) const
{
   // Convert string to C-string
   const char* name_C;
   name_C = name.c_str();  // name_C refers to the contents of name as a C-str

   hid_t new_member_id = new_member.getId();  // get new_member id for C API

   // Call C routine H5Tinsert to add the new member
   herr_t ret_value = H5Tinsert( id, name_C, offset, new_member_id );
   if( ret_value < 0 )
   {
      throw DataTypeIException("CompType::insertMember", "H5Tinsert failed");
   }
}

//--------------------------------------------------------------------------
// Function:	DataType::copy
///\brief	Copies an existing datatype to this datatype object
///\param	like_type - IN: Datatype to be copied
///\exception	H5::DataTypeIException
// Programmer	Binh-Minh Ribler - 2000
// Modification
//		- Replaced resetIdComponent() with decRefCount() to use C
//		library ID reference counting mechanism - BMR, Jun 1, 2004
//		- Replaced decRefCount with close() to let the C library
//		handle the reference counting - BMR, Jun 1, 2006
//--------------------------------------------------------------------------
void DataType::copy( const DataType& like_type )
{
    // close the current data type before copying like_type to this object
    try {
	close();
    }
    catch (Exception close_error) {
	throw DataTypeIException(inMemFunc("copy"), close_error.getDetailMsg());
    }

    // call C routine to copy the datatype
    id = H5Tcopy( like_type.getId() );
    if( id < 0 )
	throw DataTypeIException(inMemFunc("copy"), "H5Tcopy failed");
}

//--------------------------------------------------------------------------
// Function:	DataSet::getVlenBufSize
///\brief	Returns the number of bytes required to store VL data.
///\return	Amount of storage
///\exception	H5::DataSetIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
hsize_t DataSet::getVlenBufSize( DataType& type, DataSpace& space ) const
{
   // Obtain identifiers for C API
   hid_t type_id = type.getId();
   hid_t space_id = space.getId();

   hsize_t size; // for amount of storage

   herr_t ret_value = H5Dvlen_get_buf_size( id, type_id, space_id, &size );
   if( ret_value < 0 )
   {
      throw DataSetIException("DataSet::getVlenBufSize", "H5Dvlen_get_buf_size failed");
   }
   return( size );
}