ironrdp-core 0.2.0

//! Padding handling helpers
//!
//! For maximum compatibility, messages should be generated with padding set to zero,
//! and message recipients should not assume padding has any particular
//! value.

use crate::{ReadCursor, WriteCursor};

/// Writes zeroes using as few `write_u*` calls as possible.
pub fn write_padding(dst: &mut WriteCursor<'_>, mut n: usize) {
    loop {
        match n {
            0 => break,
            1 => {
                dst.write_u8(0);
                n -= 1;
            }
            2..=3 => {
                dst.write_u16(0);
                n -= 2;
            }
            4..=7 => {
                dst.write_u32(0);
                n -= 4;
            }
            _ => {
                dst.write_u64(0);
                n -= 8;
            }
        }
    }
}

/// Moves read cursor, ignoring padding bytes.
#[inline]
pub fn read_padding(src: &mut ReadCursor<'_>, n: usize) {
    src.advance(n);
}