H5LTset_attribute_ullong

herr_t H5LTset_attribute_ullong(hid_t loc_id,  const  char *  obj_name,
       const  char *  attr_name,  const  ulong *  buffer,  size_t size)

Sets an unsigned long long attribute.

Creates and writes an attribute containing unsigned long long values.

`loc_id`	Location identifier
`obj_name`	Name of the object to attach the attribute to
`attr_name`	Name of the attribute
`buffer`	Buffer containing the attribute data
`size`	Number of elements in the buffer

Non-negative on success, negative on failure.