func createDataset(id C.hid_t, name string, dtype *Datatype, dspace *Dataspace, dcpl *PropList) (*Dataset, error) {
c_name := C.CString(name)
defer C.free(unsafe.Pointer(c_name))
hid := C.H5Dcreate2(id, c_name, dtype.id, dspace.id, P_DEFAULT.id, dcpl.id, P_DEFAULT.id)
if err := h5err(C.herr_t(int(hid))); err != nil {
return nil, err
}
return newDataset(hid), nil
}
// Creates a new dataset at this location.
// hid_t H5Dcreate2( hid_t loc_id, const char *name, hid_t dtype_id, hid_t space_id, hid_t lcpl_id, hid_t dcpl_id, hid_t dapl_id )
func (f *File) CreateDataSet(name string, dtype *DataType, dspace *DataSpace, dcpl *PropList) (*DataSet, error) {
c_name := C.CString(name)
defer C.free(unsafe.Pointer(c_name))
hid := C.H5Dcreate2(f.id, c_name, dtype.id, dspace.id, P_DEFAULT.id, dcpl.id, P_DEFAULT.id)
err := togo_err(C.herr_t(int(hid)))
if err != nil {
return nil, err
}
dset := new_dataset(hid)
return dset, err
}
func createDataset(id C.hid_t, name string, dtype *Datatype, dspace *Dataspace, dcpl *PropList) (*Dataset, error) {
dtype, err := dtype.Copy() // For safety
if err != nil {
return nil, err
}
c_name := C.CString(name)
defer C.free(unsafe.Pointer(c_name))
hid := C.H5Dcreate2(id, c_name, dtype.id, dspace.id, P_DEFAULT.id, dcpl.id, P_DEFAULT.id)
if err := checkID(hid); err != nil {
return nil, err
}
return newDataset(hid), nil
}
// Put writes data into the file.
func (f *File) Put(name string, something interface{}, dimensions ...uint) error {
object := newObject()
defer object.free()
if err := initializeToPut(object, reflect.ValueOf(something), dimensions...); err != nil {
return err
}
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
one := C.hsize_t(1)
sid := C.H5Screate_simple(1, (*C.hsize_t)(unsafe.Pointer(&one)), nil)
if sid < 0 {
return errors.New("cannot create a data space")
}
defer C.H5Sclose(sid)
if result := C.H5Lexists(f.fid, cname, C.H5P_DEFAULT); result < 0 {
return errors.New("cannot check if the name already exists")
} else if result > 0 && C.H5Ldelete(f.fid, cname, C.H5P_DEFAULT) < 0 {
return errors.New("cannot overwrite an existing dataset")
}
did := C.H5Dcreate2(f.fid, cname, object.tid, sid, C.H5P_DEFAULT, C.H5P_DEFAULT, C.H5P_DEFAULT)
if did < 0 {
return errors.New("cannot create a dataset")
}
defer C.H5Dclose(did)
if C.H5Dwrite(did, object.tid, C.H5S_ALL, C.H5S_ALL, C.H5P_DEFAULT, object.data) < 0 {
return errors.New("cannot write the dataset into the file")
}
return nil
}