Method resize

arrow-buffer/src/buffer/mutable.rs:436–451

(&mut self, new_len: usize, value: u8)

    // exits.
    #[inline(always)]
    pub fn resize(&mut self, new_len: usize, value: u8) {
        if new_len > self.len {
            let diff = new_len - self.len;
            self.reserve(diff);
            // write the value
            unsafe { self.data.as_ptr().add(self.len).write_bytes(value, diff) };
        }
        // this truncates the buffer when new_len < self.len
        self.len = new_len;
        #[cfg(feature = "pool")]
        {
            if let Some(reservation) = self.reservation.lock().unwrap().as_mut() {
                reservation.resize(self.len);
            }
        }
    }

    /// Shrinks the capacity of the buffer as much as possible.
    /// The new capacity will aligned to the nearest 64 bit alignment.