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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
use crate::{Btrit, Error, Trits, T3B1};
use std::{
fmt,
ops::{Deref, DerefMut},
str::FromStr,
};
#[derive(Copy, Clone, Hash, PartialEq, Eq)]
#[repr(i8)]
#[allow(missing_docs)]
pub enum Tryte {
N = -13,
O = -12,
P = -11,
Q = -10,
R = -9,
S = -8,
T = -7,
U = -6,
V = -5,
W = -4,
X = -3,
Y = -2,
Z = -1,
Nine = 0,
A = 1,
B = 2,
C = 3,
D = 4,
E = 5,
F = 6,
G = 7,
H = 8,
I = 9,
J = 10,
K = 11,
L = 12,
M = 13,
}
impl Tryte {
pub const MIN_VALUE: Self = Tryte::N;
pub const MAX_VALUE: Self = Tryte::M;
pub fn from_trits(trits: [Btrit; 3]) -> Self {
let x = i8::from(trits[0]) + i8::from(trits[1]) * 3 + i8::from(trits[2]) * 9;
Tryte::try_from(x).unwrap()
}
pub fn as_trits(&self) -> &Trits<T3B1> {
unsafe { &*(T3B1::make(self as *const _ as *const _, 0, 3) as *const _) }
}
pub fn as_trits_mut(&mut self) -> &mut Trits<T3B1> {
unsafe { &mut *(T3B1::make(self as *const _ as *const _, 0, 3) as *mut _) }
}
}
impl From<Tryte> for char {
fn from(tryte: Tryte) -> char {
match tryte as i8 {
0 => '9',
-13..=-1 => (((tryte as i8 + 13) as u8) + b'N') as char,
1..=13 => (((tryte as i8 - 1) as u8) + b'A') as char,
x => unreachable!("Tried to decode Tryte with variant {}", x),
}
}
}
impl From<[Btrit; 3]> for Tryte {
fn from(trits: [Btrit; 3]) -> Self {
Self::from_trits(trits)
}
}
impl fmt::Debug for Tryte {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{:?}", char::from(*self))
}
}
impl fmt::Display for Tryte {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", char::from(*self))
}
}
impl TryFrom<char> for Tryte {
type Error = Error;
fn try_from(c: char) -> Result<Self, Self::Error> {
match c {
'9' => Ok(Tryte::Nine),
'N'..='Z' => Ok(unsafe { std::mem::transmute((c as u8 - b'N') as i8 - 13) }),
'A'..='M' => Ok(unsafe { std::mem::transmute((c as u8 - b'A') as i8 + 1) }),
_ => Err(Error::InvalidRepr),
}
}
}
impl TryFrom<i8> for Tryte {
type Error = Error;
fn try_from(x: i8) -> Result<Self, Self::Error> {
match x {
-13..=13 => Ok(unsafe { std::mem::transmute(x) }),
_ => Err(Error::InvalidRepr),
}
}
}
#[derive(Default)]
pub struct TryteBuf {
inner: Vec<Tryte>,
}
impl TryteBuf {
pub fn new() -> Self {
Self::default()
}
pub fn with_capacity(cap: usize) -> Self {
Self {
inner: Vec::with_capacity(cap),
}
}
pub fn try_from_str(s: &str) -> Result<Self, Error> {
s.chars().map(Tryte::try_from).collect()
}
pub fn is_empty(&self) -> bool {
self.len() == 0
}
pub fn len(&self) -> usize {
self.inner.len()
}
pub fn push(&mut self, tryte: Tryte) {
self.inner.push(tryte);
}
pub fn pop(&mut self) -> Option<Tryte> {
self.inner.pop()
}
pub fn as_trits(&self) -> &Trits<T3B1> {
unsafe { &*(T3B1::make(self.as_ptr() as *const _, 0, self.len() * 3) as *const _) }
}
pub fn as_trits_mut(&mut self) -> &mut Trits<T3B1> {
unsafe { &mut *(T3B1::make(self.as_ptr() as *const _, 0, self.len() * 3) as *mut _) }
}
}
impl Deref for TryteBuf {
type Target = [Tryte];
fn deref(&self) -> &Self::Target {
&self.inner
}
}
impl DerefMut for TryteBuf {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.inner
}
}
impl FromIterator<Tryte> for TryteBuf {
fn from_iter<I: IntoIterator<Item = Tryte>>(iter: I) -> Self {
let iter = iter.into_iter();
let mut this = Self::with_capacity(iter.size_hint().0);
for tryte in iter {
this.push(tryte);
}
this
}
}
impl<'a> From<&'a [Tryte]> for TryteBuf {
fn from(trytes: &'a [Tryte]) -> Self {
Self { inner: trytes.to_vec() }
}
}
impl FromStr for TryteBuf {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Self::try_from_str(s)
}
}
impl fmt::Debug for TryteBuf {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{:?}", self.inner)
}
}
impl fmt::Display for TryteBuf {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
for tryte in self.iter() {
write!(f, "{}", tryte)?;
}
Ok(())
}
}