H5Dread

herr_t H5Dread(hid_t dset_id,  hid_t mem_type_id,  hid_t mem_space_id,  hid_t file_space_id,
       hid_t dxpl_id,  void *  buf)

Reads data from a dataset.

`dset_id`	Dataset identifier
`mem_type_id`	Memory datatype identifier
`mem_space_id`	Memory dataspace identifier, or H5S_ALL
`file_space_id`	File dataspace identifier, or H5S_ALL
`dxpl_id`	Data transfer property list identifier, or H5P_DEFAULT
`buf`	Buffer to receive the data

Non-negative on success, negative on failure.