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#![feature(slice_internals)]
use core::slice::memchr::{memchr, memrchr};
// test fallback implementations on all targets
fn matches_one() {
assert_eq!(Some(0), memchr(b'a', b"a"));
}
fn matches_begin() {
assert_eq!(Some(0), memchr(b'a', b"aaaa"));
}
fn matches_end() {
assert_eq!(Some(4), memchr(b'z', b"aaaaz"));
}
fn matches_nul() {
assert_eq!(Some(4), memchr(b'\x00', b"aaaa\x00"));
}
fn matches_past_nul() {
assert_eq!(Some(5), memchr(b'z', b"aaaa\x00z"));
}
fn no_match_empty() {
assert_eq!(None, memchr(b'a', b""));
}
fn no_match() {
assert_eq!(None, memchr(b'a', b"xyz"));
}
fn matches_one_reversed() {
assert_eq!(Some(0), memrchr(b'a', b"a"));
}
fn matches_begin_reversed() {
assert_eq!(Some(3), memrchr(b'a', b"aaaa"));
}
fn matches_end_reversed() {
assert_eq!(Some(0), memrchr(b'z', b"zaaaa"));
}
fn matches_nul_reversed() {
assert_eq!(Some(4), memrchr(b'\x00', b"aaaa\x00"));
}
fn matches_past_nul_reversed() {
assert_eq!(Some(0), memrchr(b'z', b"z\x00aaaa"));
}
fn no_match_empty_reversed() {
assert_eq!(None, memrchr(b'a', b""));
}
fn no_match_reversed() {
assert_eq!(None, memrchr(b'a', b"xyz"));
}
fn each_alignment_reversed() {
let mut data = [1u8; 64];
let needle = 2;
let pos = 40;
data[pos] = needle;
for start in 0..16 {
assert_eq!(Some(pos - start), memrchr(needle, &data[start..]));
}
}
fn main() {
matches_one();
matches_begin();
matches_end();
matches_nul();
matches_past_nul();
no_match_empty();
no_match();
matches_one_reversed();
matches_begin_reversed();
matches_end_reversed();
matches_nul_reversed();
matches_past_nul_reversed();
no_match_empty_reversed();
no_match_reversed();
each_alignment_reversed();
}
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