Method write_string

src/vga_buffer.rs:113–122

Writes the given ASCII string to the buffer. Wraps lines at `BUFFER_WIDTH`. Supports the `\n` newline character. Does **not support strings with non-ASCII characters, since they can't be printed in the VGA text mode.

(&mut self, s: &str)

    /// support strings with non-ASCII characters, since they can't be printed in the VGA text
    /// mode.
    fn write_string(&mut self, s: &str) {
        for byte in s.bytes() {
            match byte {
                // printable ASCII byte or newline
                0x20..=0x7e | b'\n' => self.write_byte(byte),
                // not part of printable ASCII range
                _ => self.write_byte(0xfe),
            }
        }
    }

    /// Shifts all lines one line up and clears the last row.
    fn new_line(&mut self) {