clone_file

Function clone_or_copy_file_range

Source 
pub fn clone_or_copy_file_range<P: AsRef<Path>, Q: AsRef<Path>>(
    src: P,
    src_offset: u64,
    src_length: u64,
    dest: Q,
    dest_offset: u64,
) -> Result<Option<u64>>
Expand description

Tries to clone a range of bytes to another file, falling back to copy_file_range on error

Returns Ok(None) on successful clone, Ok(Some(copied_byte_count)) on successful naive copy.