yauuid 0.2.1

Yet another library to generate and parse UUIDs
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
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146

//! The implementation for Version 3 UUIDs by Md5 hashing.

use super::*;
use md5::{Md5, Digest};

impl Uuid {
    /// Creates a Version 3 UUID by Md5 hashing a name from namespace and data.
    ///
    /// There are 4 namespaces available in this crate:
    ///
    /// * NAMESPACE_DNS
    /// * NAMESPACE_OID
    /// * NAMESPACE_URL
    /// * NAMESPACE_X500
    ///
    /// # Examples
    ///
    /// ```
    /// use yauuid::Uuid;
    ///
    /// let u = Uuid::new_v3(&Uuid::NAMESPACE_DNS, "python.org".as_bytes());
    /// ```
    pub fn new_v3(ns: &Uuid, data: &[u8]) -> Self {
        let mut result = Md5::new()
            .chain(ns.as_bytes())
            .chain(data)
            .result();

        result[6] = (result[6] & 0x0f) | (0x3 << 4); // version 3
        result[8] = (result[8] & 0x3f) | 0x80;       // RFC4122 variant

        let mut uuid: [u8; 16] = Default::default();
        uuid.copy_from_slice(&result[..]);
        Uuid::from_bytes(uuid)
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    static TESTS: &'static [(&'static Uuid, &'static str, &'static str)] = &[
        (
            &Uuid::NAMESPACE_DNS,
            "example.org",
            "04738bdf-b25a-3829-a801-b21a1d25095b",
        ),
        (
	    &Uuid::NAMESPACE_DNS,
	    "rust-lang.org",
	    "c6db027c-615c-3b4d-959e-1a917747ca5a",
	),
	(
	    &Uuid::NAMESPACE_DNS,
	    "42",
	    "5aab6e0c-b7d3-379c-92e3-2bfbb5572511",
	),
	(
	    &Uuid::NAMESPACE_DNS,
	    "lorem ipsum",
	    "4f8772e9-b59c-3cc9-91a9-5c823df27281",
	),
        (
            &Uuid::NAMESPACE_DNS,
            "python.org",
            "6fa459ea-ee8a-3ca4-894e-db77e160355e",
        ),
	(
	    &Uuid::NAMESPACE_URL,
	    "example.org",
	    "39682ca1-9168-3da2-a1bb-f4dbcde99bf9",
	),
	(
	    &Uuid::NAMESPACE_URL,
	    "rust-lang.org",
	    "7ed45aaf-e75b-3130-8e33-ee4d9253b19f",
	),
	(
	    &Uuid::NAMESPACE_URL,
	    "42",
	    "08998a0c-fcf4-34a9-b444-f2bfc15731dc",
	),
	(
	    &Uuid::NAMESPACE_URL,
	    "lorem ipsum",
	    "e55ad2e6-fb89-34e8-b012-c5dde3cd67f0",
	),
        (
	    &Uuid::NAMESPACE_OID,
	    "example.org",
	    "f14eec63-2812-3110-ad06-1625e5a4a5b2",
	),
	(
	    &Uuid::NAMESPACE_OID,
	    "rust-lang.org",
	    "6506a0ec-4d79-3e18-8c2b-f2b6b34f2b6d",
	),
	(
	    &Uuid::NAMESPACE_OID,
	    "42",
	    "ce6925a5-2cd7-327b-ab1c-4b375ac044e4",
	),
	(
	    &Uuid::NAMESPACE_OID,
	    "lorem ipsum",
	    "5dd8654f-76ba-3d47-bc2e-4d6d3a78cb09",
	),
	(
	    &Uuid::NAMESPACE_X500,
	    "example.org",
	    "64606f3f-bd63-363e-b946-fca13611b6f7",
	),
	(
	    &Uuid::NAMESPACE_X500,
	    "rust-lang.org",
	    "bcee7a9c-52f1-30c6-a3cc-8c72ba634990",
	),
	(
	    &Uuid::NAMESPACE_X500,
	    "42",
	    "c1073fa2-d4a6-3104-b21d-7a6bdcf39a23",
	),
        (
	    &Uuid::NAMESPACE_X500,
	    "lorem ipsum",
	    "02f09a3f-1624-3b1d-8409-44eff7708208",
	),
    ];

    #[test]
    fn test_new() {
        for &(ref ns, ref name, _) in TESTS {
            let uuid = Uuid::new_v3(*ns, name.as_bytes());
            assert_eq!(uuid.version(), Version(3));
            assert_eq!(uuid.variant(), Variant::RFC4122);
        }
    }

    #[test]
    fn test_to_string() {
        for &(ref ns, ref name, ref exp) in TESTS {
            let uuid = Uuid::new_v3(*ns, name.as_bytes());
            assert_eq!(uuid.to_string(), *exp);
        }
    }
}