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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
#![allow(unused_assignments)]
use bytes::{Bytes, Buf};
use num_enum::TryFromPrimitive;
static BASIC_PLANE: &'static [u8] = include_bytes!("./data/basic.bin");
static SUPPLEMENTARY_PLANE: &'static [u8] = include_bytes!("./data/supplementary.bin");
#[derive(Copy, Clone, PartialEq, TryFromPrimitive)]
#[repr(u8)]
pub enum GeneralCategory {
UppercaseLetter = 0,
LowercaseLetter = 1,
TitlecaseLetter = 2,
ModifierLetter = 3,
OtherLetter = 4,
NonspacingMark = 5,
SpacingCombiningMark = 6,
EnclosingMark = 7,
DecimalDigitNumber = 8,
LetterNumber = 9,
OtherNumber = 10,
ConnectorPunctuation = 11,
DashPunctuation = 12,
OpenPunctuation = 13,
ClosePunctuation = 14,
InitialQuotePunctuation = 15,
FinalQuotePunctuation = 16,
OtherPunctuation = 17,
MathSymbol = 18,
CurrencySymbol = 19,
ModifierSymbol = 20,
OtherSymbol = 21,
SpaceSeparator = 22,
LineSeparator = 23,
ParagraphSeparator = 24,
ControlOther = 25,
FormatOther = 26,
SurrogateOther = 27,
PrivateUseOther = 28,
NotAssignedOther = 29,
}
impl GeneralCategory {
pub fn is_letter(self) -> bool {
self as u8 <= 4
}
pub fn is_mark(self) -> bool {
self as u8 >= 5 && self as u8 <= 7
}
pub fn is_number(self) -> bool {
self as u8 >= 8 && self as u8 <= 10
}
pub fn is_punctuation(self) -> bool {
self as u8 >= 11 && self as u8 <= 17
}
pub fn is_symbol(self) -> bool {
self as u8 >= 18 && self as u8 <= 21
}
pub fn is_separator(self) -> bool {
self as u8 >= 22 && self as u8 <= 24
}
pub fn is_other(self) -> bool {
self as u8 >= 25 && self as u8 <= 29
}
}
impl<'a> TryFrom<&'a str> for GeneralCategory {
type Error = ();
fn try_from(value: &'a str) -> Result<Self, Self::Error> {
use GeneralCategory as C;
(match value {
"Lu" => Ok(C::UppercaseLetter),
"Ll" => Ok(C::LowercaseLetter),
"Lt" => Ok(C::TitlecaseLetter),
"Lm" => Ok(C::ModifierLetter),
"Lo" => Ok(C::OtherLetter),
"Mn" => Ok(C::NonspacingMark),
"Mc" => Ok(C::SpacingCombiningMark),
"Me" => Ok(C::EnclosingMark),
"Nd" => Ok(C::DecimalDigitNumber),
"Nl" => Ok(C::LetterNumber),
"No" => Ok(C::OtherNumber),
"Pc" => Ok(C::ConnectorPunctuation),
"Pd" => Ok(C::DashPunctuation),
"Ps" => Ok(C::OpenPunctuation),
"Pe" => Ok(C::ClosePunctuation),
"Pi" => Ok(C::InitialQuotePunctuation),
"Pf" => Ok(C::FinalQuotePunctuation),
"Po" => Ok(C::OtherPunctuation),
"Sm" => Ok(C::MathSymbol),
"Sc" => Ok(C::CurrencySymbol),
"Sk" => Ok(C::ModifierSymbol),
"So" => Ok(C::OtherSymbol),
"Zs" => Ok(C::SpaceSeparator),
"Zl" => Ok(C::LineSeparator),
"Zp" => Ok(C::ParagraphSeparator),
"Cc" => Ok(C::ControlOther),
"Cf" => Ok(C::FormatOther),
"Cs" => Ok(C::SurrogateOther),
"Co" => Ok(C::PrivateUseOther),
"Cn" => Ok(C::NotAssignedOther),
_ => Err(()),
}).to_owned()
}
}
impl ToString for GeneralCategory {
fn to_string(&self) -> String {
use GeneralCategory as C;
(match self {
C::UppercaseLetter => "Lu",
C::LowercaseLetter => "Ll",
C::TitlecaseLetter => "Lt",
C::ModifierLetter => "Lm",
C::OtherLetter => "Lo",
C::NonspacingMark => "Mn",
C::SpacingCombiningMark => "Mc",
C::EnclosingMark => "Me",
C::DecimalDigitNumber => "Nd",
C::LetterNumber => "Nl",
C::OtherNumber => "No",
C::ConnectorPunctuation => "Pc",
C::DashPunctuation => "Pd",
C::OpenPunctuation => "Ps",
C::ClosePunctuation => "Pe",
C::InitialQuotePunctuation => "Pi",
C::FinalQuotePunctuation => "Pf",
C::OtherPunctuation => "Po",
C::MathSymbol => "Sm",
C::CurrencySymbol => "Sc",
C::ModifierSymbol => "Sk",
C::OtherSymbol => "So",
C::SpaceSeparator => "Zs",
C::LineSeparator => "Zl",
C::ParagraphSeparator => "Zp",
C::ControlOther => "Cc",
C::FormatOther => "Cf",
C::SurrogateOther => "Cs",
C::PrivateUseOther => "Co",
C::NotAssignedOther => "Cn",
}).to_owned()
}
}
impl From<char> for GeneralCategory {
fn from(code_point: char) -> Self {
let code_point = code_point as usize;
let mut compare_code_point: usize = 0;
let mut count: usize = 0;
let mut category_value: u8 = 0;
if code_point < 0x10000 {
let mut plane = Bytes::from_static(BASIC_PLANE);
loop {
if !plane.has_remaining() {
break;
}
category_value = plane.get_u8();
count = plane.get_u16_le() as usize;
compare_code_point += count;
if code_point < compare_code_point {
return GeneralCategory::try_from(category_value).unwrap();
}
}
} else {
let mut plane = Bytes::from_static(SUPPLEMENTARY_PLANE);
compare_code_point = 0x10000;
loop {
if !plane.has_remaining() {
break;
}
category_value = plane.get_u8();
count = bytes_get_u24_le(&mut plane);
compare_code_point += count;
if code_point < compare_code_point {
return GeneralCategory::try_from(category_value).unwrap();
}
}
}
GeneralCategory::NotAssignedOther
}
}
fn bytes_get_u24_le(bytes: &mut Bytes) -> usize {
(bytes.get_u16_le() as usize) | ((bytes.get_u8() as usize) << 16)
}