path: root/c++/src/H5DataSet.cpp

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#include <string>
#ifdef OLD_HEADER_FILENAME
#include <iostream.h>
#else
#include <iostream>
#endif

#include "H5Include.h"
#include "H5RefCounter.h"
#include "H5Exception.h"
#include "H5IdComponent.h"
#include "H5Idtemplates.h"
#include "H5PropList.h"
#include "H5Object.h"
#include "H5PropList.h"
#include "H5DxferProp.h"
#include "H5DataType.h"
#include "H5DcreatProp.h"
#include "H5DataSpace.h"
#include "H5AbstractDs.h"
#include "H5DataSet.h"

#ifndef H5_NO_NAMESPACE
namespace H5 {
#endif

//--------------------------------------------------------------------------
// Function:	DataSet default constructor
///\brief	Default constructor: Creates a stub dataset.
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
DataSet::DataSet() : AbstractDs() {}

//--------------------------------------------------------------------------
// Function:	DataSet overloaded constructor
///\brief	Creates an DataSet object using the id of an existing dataset.
///\param	existing_id - IN: Id of an existing dataset
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
DataSet::DataSet( const hid_t dataset_id ) : AbstractDs( dataset_id ) {}

//--------------------------------------------------------------------------
// Function:	DataSet copy constructor
///\brief	Copy constructor: makes a copy of the original DataSet object.
///\param	original - IN: DataSet instance to copy
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
DataSet::DataSet( const DataSet& original ) : AbstractDs( original ) {}

//--------------------------------------------------------------------------
// Function:	DataSet::getSpace
///\brief	Gets a copy of the dataspace of this dataset.
///\return	DataSpace instance
///\exception	H5::DataSetIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
DataSpace DataSet::getSpace() const
{
   // Calls C function H5Dget_space to get the id of the dataspace
   hid_t dataspace_id = H5Dget_space( id );

   // If the dataspace id is invalid, throw an exception
   if( dataspace_id <= 0 )
   {
      throw DataSetIException("DataSet::getSpace", "H5Dget_space failed");
   }
   //create dataspace object using the existing id then return the object
   DataSpace data_space( dataspace_id );
   return( data_space );
}

// This private member function calls the C API to get the identifier 
// of the datatype that is used by this dataset.  It is used
// by the various AbstractDs functions to get the specific datatype.
hid_t DataSet::p_getType() const
{
   hid_t type_id = H5Dget_type( id );
   if( type_id > 0 )
      return( type_id );
   else
   {
      throw DataSetIException(0, "H5Dget_type failed");
   }
}

//--------------------------------------------------------------------------
// Function:	DataSet::getCreatePlist
///\brief	Gets the dataset creation property list.
///\return	DSetCreatPropList instance
///\exception	H5::DataSetIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
DSetCreatPropList DataSet::getCreatePlist() const
{
   hid_t create_plist_id = H5Dget_create_plist( id );
   if( create_plist_id <= 0 )
   {
      throw DataSetIException("DataSet::getCreatePlist", "H5Dget_create_plist failed");
   }
   // create and return the DSetCreatPropList object 
   DSetCreatPropList create_plist( create_plist_id );
   return( create_plist );
}

//--------------------------------------------------------------------------
// Function:	DataSet::getStorageSize
///\brief	Returns the amount of storage required for a dataset.  
///\return	Amount of storage
///\exception	H5::DataSetIException
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
hsize_t DataSet::getStorageSize() const
{
   hsize_t storage_size = H5Dget_storage_size( id );

   if( storage_size > 0 )  // checking with Quincey for failure value - BMR
      return( storage_size );
   else
   {
      throw DataSetIException("DataSet::getStorageSize", "H5Dget_storage_size 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::getStorageSize", "H5Dget_storage_size failed");
   }
   return( size );
}

//--------------------------------------------------------------------------
// Function:	DataSet::getVlenBufSize
///\brief	Reclaims VL datatype memory buffers. 
///\param	dataspace - 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
//--------------------------------------------------------------------------
void DataSet::vlenReclaim( DataType& type, DataSpace& space, DSetMemXferPropList& xfer_plist, void* buf ) const
{
   // 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::read
///\brief	Reads raw data from the specified dataset.
///\param	buf - IN: Buffer for read data
///\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 reads raw data from this dataset into the 
///		buffer \a buf, converting from file datatype and dataspace 
///		to memory datatype \a mem_type and dataspace \a mem_space. 
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void DataSet::read( 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 = H5Dread( id, mem_type_id, mem_space_id, file_space_id, xfer_plist_id, buf );
   if( ret_value < 0 )
   {
      throw DataSetIException("DataSet::read", "H5Dread failed");
   }
}

//--------------------------------------------------------------------------
// Function:	DataSet::read
///\brief	This is an overloaded member function, provided for convenience.
///		It takes a reference to a \c std::string for the buffer.
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void DataSet::read( string& strg, const DataType& mem_type, const DataSpace& mem_space, const DataSpace& file_space, const DSetMemXferPropList& xfer_plist ) const
{
   // Allocate C character string for reading
   size_t size = mem_type.getSize();
   char* strg_C = new char[size+1];  // temporary C-string for C API

   // Use the overloaded member to read
   read(strg_C, mem_type, mem_space, file_space, xfer_plist);

   // Get the String and clean up
   strg = strg_C;
   delete strg_C;
}

//--------------------------------------------------------------------------
// 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");
   }
}

//--------------------------------------------------------------------------
// Function:	DataSet::write
///\brief	This is an overloaded member function, provided for convenience.
///		It takes a reference to a \c std::string for the buffer.
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void DataSet::write( const string& strg, const DataType& mem_type, const DataSpace& mem_space, const DataSpace& file_space, const DSetMemXferPropList& xfer_plist ) const
{
   // Convert string to C-string
   const char* strg_C;
   strg_C = strg.c_str();  // strg_C refers to the contents of strg as a C-str

   // Use the overloaded member
   write(strg_C, mem_type, mem_space, file_space, xfer_plist);
}

//--------------------------------------------------------------------------
// 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::extend
///\brief	Extends a dataset with unlimited dimension.
///\param	size - IN: Array containing the new magnitude of each dimension
///\exception	H5::DataSetIException
///\par Description
///		For more information, please see the Description section in
///		C layer Reference Manual at:
/// http:
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void DataSet::extend( const hsize_t* size ) const
{
   herr_t ret_value = H5Dextend( id, size );
   if( ret_value < 0 )  // raise exception when H5Dextend returns a neg value
   {
      throw DataSetIException("DataSet::extend", "H5Dextend failed");
   }
}

//--------------------------------------------------------------------------
// Function:	DataSet::fillMemBuf
///\brief	Fills a selection in memory with a value.
///\param	fill - IN: Pointer to fill value to use - default NULL
///\param	fill_type - IN: Datatype of the fill value
///\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(const void *fill, DataType& fill_type, void *buf, DataType& buf_type, DataSpace& space)
{
    hid_t fill_type_id = fill_type.getId();
    hid_t buf_type_id = buf_type.getId();
    hid_t space_id = space.getId();
    herr_t ret_value = H5Dfill(fill, fill_type_id, buf, buf_type_id, space_id);
    if( ret_value < 0 )
    {
	throw DataSetIException("DataSet::fillMemBuf", "H5Dfill failed");
    }
}

//--------------------------------------------------------------------------
// 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:    DataSet::p_close (private)
///\brief       Closes this dataset.
///\exception   H5::DataSetIException
///\note
///             This function will be obsolete because its functionality
///             is recently handled by the C library layer.
// Programmer   Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
void DataSet::p_close() const
{
   herr_t ret_value = H5Dclose( id );
   if( ret_value < 0 )
   {
      throw DataSetIException(0, "H5Dclose failed");
   }
}

//--------------------------------------------------------------------------
// Function:	DataSet destructor
///\brief	Properly terminates access to this dataset.
// Programmer	Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
DataSet::~DataSet()
{
   // The dataset id will be closed properly 
    try {
	resetIdComponent( this ); }
    catch (Exception close_error) { // thrown by p_close
        cerr << "DataSet::~DataSet - " << close_error.getDetailMsg() << endl;
    }
}

#ifndef H5_NO_NAMESPACE
} // end namespace
#endif