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pub(crate) fn memchr(n1: u8, haystack: &[u8]) -> Option<usize> {
haystack.iter().position(|&b| b == n1)
}
pub(crate) fn memchr2(n1: u8, n2: u8, haystack: &[u8]) -> Option<usize> {
haystack.iter().position(|&b| b == n1 || b == n2)
}
pub(crate) fn memchr3(
n1: u8,
n2: u8,
n3: u8,
haystack: &[u8],
) -> Option<usize> {
haystack.iter().position(|&b| b == n1 || b == n2 || b == n3)
}
pub(crate) fn memrchr(n1: u8, haystack: &[u8]) -> Option<usize> {
haystack.iter().rposition(|&b| b == n1)
}
pub(crate) fn memrchr2(n1: u8, n2: u8, haystack: &[u8]) -> Option<usize> {
haystack.iter().rposition(|&b| b == n1 || b == n2)
}
pub(crate) fn memrchr3(
n1: u8,
n2: u8,
n3: u8,
haystack: &[u8],
) -> Option<usize> {
haystack.iter().rposition(|&b| b == n1 || b == n2 || b == n3)
}
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