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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
use super::parse::*;
use std::{
    borrow::Cow,
    cmp::Ordering,
    fmt,
    hash::{Hash, Hasher},
};

/// A media-type name.
///
/// A valid name has the following requirements:
///
/// - The first character must be an alphabet or a number.
/// - The subsequent characters must be alphabets, numbers or `!#$&-^_.+%*'`.
/// - Length of the name can not exceed 127 bytes.
#[derive(Debug, Copy, Clone)]
pub struct Name<'a>(&'a str);

impl<'a> Name<'a> {
    /// Constructs a `Name`.
    ///
    /// If the string is not valid as a name, returns `None`.
    #[must_use]
    pub fn new(s: &'a str) -> Option<Self> {
        if is_restricted_name(s) {
            Some(Self(s))
        } else {
            None
        }
    }

    /// Returns the underlying string.
    #[must_use]
    pub const fn as_str(&self) -> &'a str {
        self.0
    }

    /// The maximum byte length of a name.
    pub const MAX_LENGTH: usize = 127;

    /// Constructs a `Name` without validation.
    pub const fn new_unchecked(s: &'a str) -> Self {
        Self(s)
    }
}

impl<'a> fmt::Display for Name<'a> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.write_str(self.0)
    }
}

impl<'a> AsRef<str> for Name<'a> {
    fn as_ref(&self) -> &str {
        self.0
    }
}

impl<'a> PartialEq for Name<'a> {
    fn eq(&self, other: &Self) -> bool {
        self.0.eq_ignore_ascii_case(other.as_ref())
    }
}

impl<'a> Eq for Name<'a> {}

impl<'a> PartialOrd for Name<'a> {
    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
        Some(self.cmp(other))
    }
}

impl<'a> Ord for Name<'a> {
    fn cmp(&self, other: &Self) -> Ordering {
        self.0
            .chars()
            .map(|c| c.to_ascii_lowercase())
            .cmp(other.0.chars().map(|c| c.to_ascii_lowercase()))
    }
}

impl<'a> Hash for Name<'a> {
    fn hash<H: Hasher>(&self, state: &mut H) {
        self.0.to_ascii_lowercase().hash(state);
    }
}

impl<'a> PartialEq<String> for Name<'a> {
    fn eq(&self, other: &String) -> bool {
        self.eq(other.as_str())
    }
}

impl<'a> PartialOrd<String> for Name<'a> {
    fn partial_cmp(&self, other: &String) -> Option<Ordering> {
        self.partial_cmp(other.as_str())
    }
}

impl<'a> PartialEq<&String> for Name<'a> {
    fn eq(&self, other: &&String) -> bool {
        self.eq(other.as_str())
    }
}

impl<'a> PartialOrd<&String> for Name<'a> {
    fn partial_cmp(&self, other: &&String) -> Option<Ordering> {
        self.partial_cmp(other.as_str())
    }
}

impl<'a> PartialEq<str> for Name<'a> {
    fn eq(&self, other: &str) -> bool {
        self.0.eq_ignore_ascii_case(other)
    }
}

impl<'a> PartialOrd<str> for Name<'a> {
    fn partial_cmp(&self, other: &str) -> Option<Ordering> {
        Some(
            self.0
                .chars()
                .map(|c| c.to_ascii_lowercase())
                .cmp(other.chars().map(|c| c.to_ascii_lowercase())),
        )
    }
}

impl<'a> PartialEq<&str> for Name<'a> {
    fn eq(&self, other: &&str) -> bool {
        self.eq(*other)
    }
}

impl<'a> PartialOrd<&str> for Name<'a> {
    fn partial_cmp(&self, other: &&str) -> Option<Ordering> {
        self.partial_cmp(*other)
    }
}

impl<'a> PartialEq<Cow<'_, str>> for Name<'a> {
    fn eq(&self, other: &Cow<'_, str>) -> bool {
        self.eq(other.as_ref())
    }
}

impl<'a> PartialOrd<Cow<'_, str>> for Name<'a> {
    fn partial_cmp(&self, other: &Cow<'_, str>) -> Option<Ordering> {
        self.partial_cmp(other.as_ref())
    }
}

impl<'a> PartialEq<&Cow<'_, str>> for Name<'a> {
    fn eq(&self, other: &&Cow<'_, str>) -> bool {
        self.eq(other.as_ref())
    }
}

impl<'a> PartialOrd<&Cow<'_, str>> for Name<'a> {
    fn partial_cmp(&self, other: &&Cow<'_, str>) -> Option<Ordering> {
        self.partial_cmp(other.as_ref())
    }
}