memx 0.2.2

memory functions like libc memcmp(), memchr(), memmem(), memcpy(), memset()
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84

/**/

#[test]
fn test_memrnechr_tpl_empty_buffer() {
    let buf = [];
    assert_eq!(test_memrnechr_tpl(&buf, b'a', b'b', b'c'), None);
}

#[test]
fn test_memrnechr_tpl_single_element_found() {
    let buf = *b"d";
    assert_eq!(test_memrnechr_tpl(&buf, b'a', b'b', b'c'), Some(0));
}

#[test]
fn test_memrnechr_tpl_single_element_not_found_1() {
    let buf = *b"a";
    assert_eq!(test_memrnechr_tpl(&buf, b'a', b'b', b'c'), None);
}

#[test]
fn test_memrnechr_tpl_single_element_not_found_2() {
    let buf = *b"b";
    assert_eq!(test_memrnechr_tpl(&buf, b'a', b'b', b'c'), None);
}

#[test]
fn test_memrnechr_tpl_single_element_not_found_3() {
    let buf = *b"c";
    assert_eq!(test_memrnechr_tpl(&buf, b'a', b'b', b'c'), None);
}

#[test]
fn test_memrnechr_tpl_needle_at_start() {
    let buf = *b"dabc";
    assert_eq!(test_memrnechr_tpl(&buf, b'a', b'b', b'c'), Some(0));
}

#[test]
fn test_memrnechr_tpl_needle_at_middle() {
    let buf = *b"adbc";
    assert_eq!(test_memrnechr_tpl(&buf, b'a', b'b', b'c'), Some(1));
}

#[test]
fn test_memrnechr_tpl_needle_at_end() {
    let buf = *b"abdc";
    assert_eq!(test_memrnechr_tpl(&buf, b'a', b'b', b'c'), Some(2));
}

#[test]
fn test_memrnechr_tpl_needle_not_found() {
    let buf = *b"abca";
    assert_eq!(test_memrnechr_tpl(&buf, b'a', b'b', b'c'), None);
}

#[test]
fn test_memrnechr_tpl_multiple_occurrences() {
    let buf = *b"adbecf";
    assert_eq!(test_memrnechr_tpl(&buf, b'a', b'b', b'c'), Some(5));
}

#[test]
fn test_memrnechr_tpl_long_buffer() {
    let buf = [b'a'; 1024];
    let mut expected_idx = None;
    let mut long_buf = buf.to_vec();
    for (i, item) in long_buf.iter_mut().enumerate().take(1024) {
        if i == 512 {
            *item = b'x';
            expected_idx = Some(i);
        }
    }
    assert_eq!(
        test_memrnechr_tpl(&long_buf, b'a', b'b', b'c'),
        expected_idx
    );
}

#[test]
fn test_memrnechr_tpl_long_buffer_not_found() {
    let buf = [b'a'; 1024];
    assert_eq!(test_memrnechr_tpl(&buf, b'a', b'b', b'c'), None);
}