Function find_byteset

rust/stringzilla.rs:1405–1419

(haystack: H, needles: Byteset)

/// `needles` within `haystack`, if found, otherwise `None`.
#[inline(always)]
pub fn find_byteset<H>(haystack: H, needles: Byteset) -> Option<usize>
where
    H: AsRef<[u8]>,
{
    let haystack_ref = haystack.as_ref();
    let haystack_pointer = haystack_ref.as_ptr() as _;
    let haystack_length = haystack_ref.len();

    let result = unsafe { sz_find_byteset(haystack_pointer, haystack_length, &needles as *const _ as *const c_void) };
    if result.is_null() {
        None
    } else {
        Some(unsafe { result.offset_from(haystack_pointer) }.try_into().unwrap())
    }
}

/// Finds the index of the last character in `haystack` that is also present in `needles`.
/// This can be used to find the last occurrence of any character from a specified set,