Function append_data_rows 

pub(crate) fn append_data_rows(
    rows: &mut Vec<Row>,
    desc: &TensorDescriptor,
    buf: &[u8],
    buf_file_offset: usize,
    mode: DataMode,
)

Append rows displaying the tensor buffer buf in the chosen DataMode.

buf_file_offset is the byte offset of buf within the file — used for the offset column in hex-mode rows.