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
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
use crate::doc;
use crate::errors::ParseIntError;
use crate::int::radix::assert_range;
use alloc::string::String;
use alloc::vec::Vec;
use core::num::IntErrorKind;
macro_rules! radix {
($BUint: ident, $BInt: ident, $Digit: ident) => {
#[doc = doc::radix::impl_desc!($BInt)]
impl<const N: usize> $BInt<N> {
/// Converts a byte slice in a given base to an integer. The input slice must contain ascii/utf8 characters in [0-9a-zA-Z].
///
/// This function is equivalent to the [`from_str_radix`](#method.from_str_radix) function for a string slice equivalent to the byte slice and the same radix.
///
/// Returns `None` if the conversion of the byte slice to string slice fails or if a digit is larger than or equal to the given radix, otherwise the integer is wrapped in `Some`.
#[inline]
pub const fn parse_bytes(buf: &[u8], radix: u32) -> Option<Self> {
let s = crate::nightly::option_try!(crate::nightly::ok!(core::str::from_utf8(buf)));
crate::nightly::ok!(Self::from_str_radix(s, radix))
}
/// Converts a slice of big-endian digits in the given radix to an integer. The digits are first converted to an unsigned integer, then this is transmuted to a signed integer. Each `u8` of the slice is interpreted as one digit of base `radix` of the number, so this function will return `None` if any digit is greater than or equal to `radix`, otherwise the integer is wrapped in `Some`.
///
/// For examples, see the
#[doc = concat!("[`from_radix_be`](crate::", stringify!($BUint), "::from_radix_be) method documentation for [`", stringify!($BUint), "`](crate::", stringify!($BUint), ").")]
#[inline]
pub const fn from_radix_be(buf: &[u8], radix: u32) -> Option<Self> {
match $BUint::from_radix_be(buf, radix) { // TODO: use Option::map when stable
Some(uint) => Some(Self::from_bits(uint)),
None => None,
}
}
/// Converts a slice of big-endian digits in the given radix to an integer. The digits are first converted to an unsigned integer, then this is transmuted to a signed integer. Each `u8` of the slice is interpreted as one digit of base `radix` of the number, so this function will return `None` if any digit is greater than or equal to `radix`, otherwise the integer is wrapped in `Some`.
///
/// For examples, see the
#[doc = concat!("[`from_radix_le`](crate::", stringify!($BUint), "::from_radix_le) method documentation for [`", stringify!($BUint), "`](crate::", stringify!($BUint), ").")]
#[inline]
pub const fn from_radix_le(buf: &[u8], radix: u32) -> Option<Self> {
match $BUint::from_radix_le(buf, radix) { // TODO: use Option::map when stable
Some(uint) => Some(Self::from_bits(uint)),
None => None,
}
}
/// Converts a string slice in a given base to an integer.
///
/// The string is expected to be an optional `+` or `-` sign followed by digits. Leading and trailing whitespace represent an error. Digits are a subset of these characters, depending on `radix`:
///
/// - `0-9`
/// - `a-z`
/// - `A-Z`
///
/// # Panics
///
/// This function panics if `radix` is not in the range from 2 to 36 inclusive.
///
/// For examples, see the
#[doc = concat!("[`from_str_radix`](crate::", stringify!($BUint), "::from_str_radix) method documentation for [`", stringify!($BUint), "`](crate::", stringify!($BUint), ").")]
#[inline]
pub const fn from_str_radix(src: &str, radix: u32) -> Result<Self, ParseIntError> {
assert_range!(radix, 36);
if src.is_empty() {
return Err(ParseIntError {
kind: IntErrorKind::Empty,
});
}
let mut negative = false;
let mut leading_sign = false;
let buf = src.as_bytes();
if buf[0] == b'-' {
negative = true;
leading_sign = true;
} else if buf[0] == b'+' {
leading_sign = true;
}
match $BUint::from_buf_radix_internal::<true, true>(buf, radix, leading_sign) {
Ok(uint) => {
if negative {
if uint.bit(Self::BITS - 1) && uint.trailing_zeros() != Self::BITS - 1 {
Err(ParseIntError {
kind: IntErrorKind::NegOverflow,
})
} else {
Ok(Self::from_bits(uint).wrapping_neg())
}
} else {
let out = Self::from_bits(uint);
if out.is_negative() {
Err(ParseIntError {
kind: IntErrorKind::PosOverflow,
})
} else {
Ok(out)
}
}
}
Err(err) => {
if let IntErrorKind::PosOverflow = err.kind() {
if negative {
return Err(ParseIntError {
kind: IntErrorKind::NegOverflow,
});
}
}
return Err(err)
}
}
}
#[doc = doc::radix::parse_str_radix!($BUint)]
#[inline]
pub const fn parse_str_radix(src: &str, radix: u32) -> Self {
match Self::from_str_radix(src, radix) {
Ok(n) => n,
Err(e) => panic!("{}", e.description()),
}
}
/// Returns the integer as a string in the given radix.
///
/// # Panics
///
/// This function panics if `radix` is not in the range from 2 to 36 inclusive.
///
/// For examples, see the
#[doc = concat!("[`to_str_radix`](crate::", stringify!($BUint), "::to_str_radix) method documentation for [`", stringify!($BUint), "`](crate::", stringify!($BUint), ").")]
#[inline]
pub fn to_str_radix(&self, radix: u32) -> String {
if self.is_negative() {
format!("-{}", self.unsigned_abs().to_str_radix(radix))
} else {
self.bits.to_str_radix(radix)
}
}
/// Returns the integer's underlying representation as an unsigned integer in the given base in big-endian digit order.
///
/// # Panics
///
/// This function panics if `radix` is not in the range from 2 to 256 inclusive.
///
/// For examples, see the
#[doc = concat!("[`to_radix_be`](crate::", stringify!($BUint), "::to_radix_be) method documentation for [`", stringify!($BUint), "`]")]
#[inline]
pub fn to_radix_be(&self, radix: u32) -> Vec<u8> {
self.bits.to_radix_be(radix)
}
/// Returns the integer's underlying representation as an unsigned integer in the given base in little-endian digit order.
///
/// # Panics
///
/// This function panics if `radix` is not in the range from 2 to 256 inclusive.
///
/// For examples, see the
#[doc = concat!("[`to_radix_le`](crate::", stringify!($BUint), "::to_radix_le) method documentation for [`", stringify!($BUint), "`](crate::", stringify!($BUint), ").")]
#[inline]
pub fn to_radix_le(&self, radix: u32) -> Vec<u8> {
self.bits.to_radix_le(radix)
}
}
#[cfg(test)]
paste::paste! {
mod [<$Digit _digit_tests>] {
use crate::test::types::big_types::$Digit::*;
use crate::test::{quickcheck_from_to_radix, test_bignum, self};
use crate::$BInt;
use crate::test::types::itest;
test_bignum! {
function: <itest>::from_str_radix,
cases: [
("-14359abcasdhfkdgdfgsde", 34u32),
("+23797984569ahgkhhjdskjdfiu", 32u32),
("-253613132341435345", 7u32),
("+23467abcad47790809ef37", 16u32),
("-712930769245766867875986646", 10u32),
("-😱234292", 36u32),
("-+345934758", 13u32),
("12💯12", 15u32),
("gap gap", 36u32),
("-9223372036854775809", 10u32),
("-1000000000000000000001", 8u32),
("+1000000000000000000001", 8u32),
("-8000000000000001", 16u32),
("+-23459374", 15u32),
("8000000000000000", 16u32),
("", 10u32)
]
}
quickcheck_from_to_radix!(itest, radix_be, 256);
quickcheck_from_to_radix!(itest, radix_le, 256);
quickcheck_from_to_radix!(itest, str_radix, 36);
test::quickcheck_from_str_radix!(itest, "+" | "-");
test::quickcheck_from_str!(itest);
#[test]
fn from_to_radix_le() {
let buf = &[
61, 45, 48, 20, 37, 59, 53, 28, 28, 52, 54, 13, 44, 3, 46, 42, 20, 46, 37, 32,
13, 27, 47, 30, 33, 25, 3, 32, 4, 54, 53, 6, 44, 25, 10, 22, 33, 48, 7, 17,
];
let u = $BInt::<100>::from_radix_le(buf, 64).unwrap();
let v = u.to_radix_le(64);
assert_eq!(v, buf);
let buf = &[
33, 34, 61, 53, 74, 67, 54, 62, 22, 29, 4, 2, 43, 73, 74, 24, 8, 74, 65, 3, 78,
];
let option = $BInt::<100>::from_radix_le(buf, 78);
assert!(option.is_none());
let buf = &[
1, 3, 3, 0, 2, 1, 2, 3, 0, 4, 1, 2, 0, 0, 0, 0, 3, 2, 0, 1, 0, 4, 1, 3, 1, 4,
3, 3, 3, 4, 1, 2, 2, 1, 3, 0, 2, 1, 2, 3, 1, 1, 0, 2, 2, 1, 1, 2, 1, 0, 0, 0,
3, 3, 3, 0, 0, 4, 4, 2,
];
let u = $BInt::<100>::from_radix_le(buf, 5).unwrap();
let v = u.to_radix_le(5);
assert_eq!(v, buf);
}
#[test]
fn from_to_radix_be() {
let buf = &[
29, 89, 92, 118, 69, 140, 141, 70, 71, 76, 66, 13, 30, 28, 38, 145, 40, 7, 57,
18, 25, 65, 150, 119, 155, 18, 64, 76, 106, 87,
];
let u = $BInt::<100>::from_radix_be(buf, 157).unwrap();
let v = u.to_radix_be(157);
assert_eq!(v, buf);
let buf = &[
1, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1,
1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0,
1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0,
0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1,
];
let u = $BInt::<100>::from_radix_be(buf, 2).unwrap();
let v = u.to_radix_be(2);
assert_eq!(v, buf);
let buf = &[
91, 167, 5, 99, 61, 38, 158, 149, 115, 79, 13, 118, 53, 16, 144, 123, 70, 81,
78, 61, 39, 6, 34, 95, 98, 23, 175, 182,
];
let option = $BInt::<100>::from_radix_le(buf, 180);
assert!(option.is_none());
let buf = &[
39, 90, 119, 93, 95, 7, 70, 81, 3, 100, 39, 107, 98, 31, 61, 5, 36, 19, 18,
124, 4, 77, 119, 17, 121, 116, 24, 35,
];
let u = $BInt::<100>::from_radix_be(buf, 128).unwrap();
let v = u.to_radix_be(128);
assert_eq!(v, buf);
}
#[test]
fn from_to_str_radix() {
let src = "-293487598aashkhkhakb8345cbvjkus";
let u = $BInt::<100>::from_str_radix(src, 35).unwrap();
let v = u.to_str_radix(35);
assert_eq!(v, src);
let src = "zzzzzzzzzzzzzzzzzzzzzzzzz";
let result = $BInt::<1>::from_str_radix(src, 36);
assert!(result.is_err());
let invalid = "inval_id string";
let result = $BInt::<1>::from_str_radix(invalid, 36);
assert!(result.is_err());
let src = "72954hslfhbui79845y6audfgiu984h5ihhhdfg";
let u = $BInt::<100>::from_str_radix(src, 36).unwrap();
assert_eq!(u.to_str_radix(36), src);
}
#[test]
fn parse_bytes() {
let src = "1797972456987acbdead7889";
let u = $BInt::<100>::parse_bytes(src.as_bytes(), 16).unwrap();
let v = $BInt::<100>::from_str_radix(src, 16).unwrap();
assert_eq!(u, v);
assert_eq!(v.to_str_radix(16), src);
let bytes = b"279874657dgfhjh";
let option = $BInt::<100>::parse_bytes(bytes, 11);
assert!(option.is_none());
}
}
}
};
}
crate::macro_impl!(radix);