oxihuman-core 0.1.2

Core data structures, algorithms, and asset management for OxiHuman
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

#![allow(dead_code)]
// Copyright (C) 2026 COOLJAPAN OU (Team KitaSan)
// SPDX-License-Identifier: Apache-2.0

/// A simple UUID representation (128-bit).
#[allow(dead_code)]
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct SimpleUuid {
    bytes: [u8; 16],
}

#[allow(dead_code)]
pub fn new_simple_uuid(bytes: [u8; 16]) -> SimpleUuid {
    SimpleUuid { bytes }
}

#[allow(dead_code)]
pub fn uuid_to_string(uuid: &SimpleUuid) -> String {
    let b = &uuid.bytes;
    format!(
        "{:02x}{:02x}{:02x}{:02x}-{:02x}{:02x}-{:02x}{:02x}-{:02x}{:02x}-{:02x}{:02x}{:02x}{:02x}{:02x}{:02x}",
        b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7],
        b[8], b[9], b[10], b[11], b[12], b[13], b[14], b[15]
    )
}

#[allow(dead_code)]
pub fn uuid_from_string(s: &str) -> Option<SimpleUuid> {
    let hex: String = s.chars().filter(|c| c.is_ascii_hexdigit()).collect();
    if hex.len() != 32 {
        return None;
    }
    let mut bytes = [0u8; 16];
    for i in 0..16 {
        bytes[i] = u8::from_str_radix(&hex[i * 2..i * 2 + 2], 16).ok()?;
    }
    Some(SimpleUuid { bytes })
}

#[allow(dead_code)]
pub fn uuids_equal(a: &SimpleUuid, b: &SimpleUuid) -> bool {
    a.bytes == b.bytes
}

#[allow(dead_code)]
pub fn uuid_is_nil(uuid: &SimpleUuid) -> bool {
    uuid.bytes == [0u8; 16]
}

#[allow(dead_code)]
pub fn uuid_version(uuid: &SimpleUuid) -> u8 {
    (uuid.bytes[6] >> 4) & 0x0F
}

#[allow(dead_code)]
pub fn uuid_to_bytes(uuid: &SimpleUuid) -> [u8; 16] {
    uuid.bytes
}

#[allow(dead_code)]
pub fn uuid_from_bytes(bytes: [u8; 16]) -> SimpleUuid {
    SimpleUuid { bytes }
}

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

    #[test]
    fn test_new_simple_uuid() {
        let uuid = new_simple_uuid([0; 16]);
        assert!(uuid_is_nil(&uuid));
    }

    #[test]
    fn test_uuid_to_string() {
        let uuid = new_simple_uuid([0; 16]);
        let s = uuid_to_string(&uuid);
        assert_eq!(s, "00000000-0000-0000-0000-000000000000");
    }

    #[test]
    fn test_uuid_from_string() {
        let s = "550e8400-e29b-41d4-a716-446655440000";
        let uuid = uuid_from_string(s).expect("should succeed");
        assert_eq!(uuid_to_string(&uuid), s);
    }

    #[test]
    fn test_uuid_from_string_invalid() {
        assert!(uuid_from_string("not-a-uuid").is_none());
    }

    #[test]
    fn test_uuids_equal() {
        let a = new_simple_uuid([1; 16]);
        let b = new_simple_uuid([1; 16]);
        assert!(uuids_equal(&a, &b));
    }

    #[test]
    fn test_uuids_not_equal() {
        let a = new_simple_uuid([1; 16]);
        let b = new_simple_uuid([2; 16]);
        assert!(!uuids_equal(&a, &b));
    }

    #[test]
    fn test_uuid_is_nil() {
        let uuid = new_simple_uuid([0; 16]);
        assert!(uuid_is_nil(&uuid));
    }

    #[test]
    fn test_uuid_version() {
        let mut bytes = [0u8; 16];
        bytes[6] = 0x40; // version 4
        let uuid = new_simple_uuid(bytes);
        assert_eq!(uuid_version(&uuid), 4);
    }

    #[test]
    fn test_uuid_to_bytes() {
        let bytes = [1u8; 16];
        let uuid = new_simple_uuid(bytes);
        assert_eq!(uuid_to_bytes(&uuid), bytes);
    }

    #[test]
    fn test_uuid_from_bytes() {
        let bytes = [42u8; 16];
        let uuid = uuid_from_bytes(bytes);
        assert_eq!(uuid.bytes, bytes);
    }
}