H5Dwrite_chunk

herr_t H5Dwrite_chunk(hid_t dset_id,  hid_t dxpl_id,  uint  filters,  const  hsize_t *  offset,
       size_t data_size,  const  void *  buf)

Writes a raw data chunk directly to a dataset.

`dset_id`	Dataset identifier
`dxpl_id`	Data transfer property list identifier, or H5P_DEFAULT
`filters`	Mask indicating which filters are used with the chunk
`offset`	Logical position of the chunk's first element
`data_size`	Size of the chunk data in bytes
`buf`	Buffer containing the chunk data

Non-negative on success, negative on failure.