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
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
use core::fmt;
use awint_internals::*;
use SerdeError::*;
use crate::Bits;
const fn verify_for_bytes_assign(src: &[u8], radix: u8) -> Result<(), SerdeError> {
if radix < 2 || radix > 36 {
return Err(InvalidRadix)
}
if src.is_empty() {
return Err(Empty)
}
const_for!(i in {0..src.len()} {
let b = src[i];
if b == b'_' {
continue;
}
let in_decimal_range = b'0' <= b && b < (b'0' + radix);
let in_lower_range = (radix > 10) && (b'a' <= b) && (b < (b'a' + (radix - 10)));
let in_upper_range = (radix > 10) && (b'A' <= b) && (b < (b'A' + (radix - 10)));
if radix <= 10 {
if !in_decimal_range {
return Err(InvalidChar)
}
} else if !(in_decimal_range || in_lower_range || in_upper_range) {
return Err(InvalidChar)
}
});
Ok(())
}
impl Bits {
#[doc(hidden)]
pub const fn power_of_two_bytes_assign(
&mut self,
sign: Option<bool>,
src: &[u8],
radix: u8,
pad: &mut Self,
) -> Result<(), SerdeError> {
if self.bw() != pad.bw() {
return Err(NonEqualWidths)
}
if !radix.is_power_of_two() {
return Err(InvalidRadix)
}
let log2 = radix.trailing_zeros() as usize;
if let Err(e) = verify_for_bytes_assign(src, radix) {
return Err(e)
}
pad.zero_assign();
let mut shl = 0;
const_for!(i in {0..src.len()}.rev() {
let b = src[i];
if b == b'_' {
continue;
}
let char_digit = if b <= b'9' {
b.wrapping_sub(b'0')
} else if b <= b'Z' {
b.wrapping_sub(b'A').wrapping_add(10)
} else {
b.wrapping_sub(b'a').wrapping_add(10)
} as usize;
pad.usize_or_assign(char_digit, shl);
shl += log2;
if shl >= self.bw() {
if (BITS - (char_digit.leading_zeros() as usize)) + shl - log2 > self.bw() {
return Err(Overflow)
}
const_for!(i in {0..i} {
match src[i] {
b'_' | b'0' => (),
_ => return Err(Overflow)
}
});
break
}
});
if let Some(sign) = sign {
if sign {
if pad.lz() == 0 && !pad.is_imin() {
return Err(Overflow)
}
pad.neg_assign();
} else if pad.lz() == 0 {
return Err(Overflow)
}
}
self.copy_assign(pad);
Ok(())
}
pub const fn bytes_radix_assign(
&mut self,
sign: Option<bool>,
src: &[u8],
radix: u8,
pad0: &mut Self,
pad1: &mut Self,
) -> Result<(), SerdeError> {
if (self.bw() != pad0.bw()) || (self.bw() != pad1.bw()) {
return Err(NonEqualWidths)
}
if radix.is_power_of_two() {
return self.power_of_two_bytes_assign(sign, src, radix, pad0)
}
if let Err(e) = verify_for_bytes_assign(src, radix) {
return Err(e)
}
pad0.zero_assign();
pad1.uone_assign();
const_for!(i in {0..src.len()}.rev() {
let b = src[i];
if b == b'_' {
continue;
}
let char_digit = if radix <= 10 || b <= b'9' {
b.wrapping_sub(b'0')
} else if b <= b'Z' {
b.wrapping_sub(b'A').wrapping_add(10)
} else {
b.wrapping_sub(b'a').wrapping_add(10)
} as usize;
let o0 = pad0.short_mul_add_triop(pad1, char_digit).unwrap();
if o0 {
return Err(Overflow)
}
let o1 = pad1.short_cin_mul(0, radix as usize);
if o1 != 0 {
const_for!(i in {0..i} {
match src[i] {
b'_' | b'0' => (),
_ => return Err(Overflow)
}
});
break
}
});
if let Some(sign) = sign {
if sign {
if pad0.lz() == 0 && !pad0.is_imin() {
return Err(Overflow)
}
pad0.neg_assign();
} else if pad0.lz() == 0 {
return Err(Overflow)
}
}
self.copy_assign(pad0);
Ok(())
}
pub const fn to_bytes_radix(
&self,
signed: bool,
dst: &mut [u8],
radix: u8,
upper: bool,
pad: &mut Self,
) -> Result<(), SerdeError> {
if self.bw() != pad.bw() {
return Err(NonEqualWidths)
}
if radix < 2 || radix > 36 {
return Err(InvalidRadix)
}
pad.copy_assign(self);
if signed && pad.msb() {
pad.neg_assign();
}
const_for!(i in {0..dst.len()}.rev() {
let rem = pad.short_udivide_assign(radix as usize).unwrap() as u8;
if rem < 10 {
dst[i] = b'0' + rem;
} else if upper {
dst[i] = b'A' + (rem - 10);
} else {
dst[i] = b'a' + (rem - 10);
}
});
if !pad.is_zero() {
Err(Overflow)
} else {
Ok(())
}
}
#[inline]
pub(crate) fn debug_format_hexadecimal(
&self,
f: &mut fmt::Formatter,
upper: bool,
) -> fmt::Result {
f.write_fmt(format_args!("0x"))?;
const_for!(j0 in {0..((self.bw() >> 2) + 1)}.rev() {
if (self.get_digit(j0 << 2) & 0b1111) != 0 {
const_for!(j1 in {0..(j0 + 1)}.rev() {
let mut char_digit = (self.get_digit(j1 << 2) & 0b1111) as u8;
if char_digit < 10 {
char_digit += b'0';
} else if upper {
char_digit += b'A' - 10;
} else {
char_digit += b'a' - 10;
}
let c = unsafe { char::from_u32_unchecked(char_digit as u32) };
f.write_fmt(format_args!("{}", c))?;
if ((j1 % 8) == 0) && (j1 != 0) {
f.write_fmt(format_args!("_"))?;
}
});
break
}
if j0 == 0 {
f.write_fmt(format_args!("{}", '0'))?;
}
});
f.write_fmt(format_args!("_u{}", self.bw()))
}
#[inline]
pub(crate) fn debug_format_octal(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_fmt(format_args!("0o"))?;
const_for!(j0 in {0..((self.bw() / 3) + 1)}.rev() {
if (self.get_digit(j0 * 3) & 0b111) != 0 {
const_for!(j1 in {0..(j0 + 1)}.rev() {
let mut char_digit = (self.get_digit(j1 * 3) & 0b111) as u8;
char_digit += b'0';
let c = unsafe { char::from_u32_unchecked(char_digit as u32) };
if let Err(e) = f.write_fmt(format_args!("{}", c)) {
return Err(e)
}
if ((j1 % 8) == 0) && (j1 != 0) {
f.write_fmt(format_args!("_"))?;
}
});
break
}
if j0 == 0 {
f.write_fmt(format_args!("{}", '0'))?;
}
});
f.write_fmt(format_args!("_u{}", self.bw()))
}
#[inline]
pub(crate) fn debug_format_binary(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_fmt(format_args!("0b"))?;
const_for!(j0 in {0..self.bw()}.rev() {
if (self.get_digit(j0) & 0b1) != 0 {
const_for!(j1 in {0..(j0 + 1)}.rev() {
let mut char_digit = (self.get_digit(j1) & 0b1) as u8;
char_digit += b'0';
let c = unsafe { char::from_u32_unchecked(char_digit as u32) };
if let Err(e) = f.write_fmt(format_args!("{}", c)) {
return Err(e)
}
if ((j1 % 8) == 0) && (j1 != 0) {
f.write_fmt(format_args!("_"))?;
}
});
break
}
if j0 == 0 {
f.write_fmt(format_args!("{}", '0'))?;
}
});
f.write_fmt(format_args!("_u{}", self.bw()))
}
}