Function parse_digits

rust/crates/ccusage/src/date_utils.rs:169–178

(bytes: &[u8])

}

pub(crate) fn parse_digits(bytes: &[u8]) -> Option<u32> {
    let mut value = 0;
    for byte in bytes {
        if !byte.is_ascii_digit() {
            return None;
        }
        value = value * 10 + u32::from(byte - b'0');
    }
    Some(value)
}

pub(crate) fn days_in_month(year: i32, month: u32) -> u32 {
    match month {